Rename core package to protocol

57 files changed, 0 insertions, 14971 deletions

diff --git a/contracts/core/.solhint.json b/contracts/core/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/core/.solhint.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "extends": "default",
-    "rules": {
-        "avoid-low-level-calls": false,
-        "avoid-tx-origin": "warn",
-        "bracket-align": false,
-        "code-complexity": false,
-        "const-name-snakecase": "error",
-        "expression-indent": "error",
-        "function-max-lines": false,
-        "func-order": "error",
-        "indent": ["error", 4],
-        "max-line-length": ["warn", 160],
-        "no-inline-assembly": false,
-        "quotes": ["error", "double"],
-        "separate-by-one-line-in-contract": "error",
-        "space-after-comma": "error",
-        "statement-indent": "error"
-    }
-}
diff --git a/contracts/core/CHANGELOG.json b/contracts/core/CHANGELOG.json
deleted file mode 100644
index 371f18cd4..000000000
--- a/contracts/core/CHANGELOG.json
+++ /dev/null
@@ -1,121 +0,0 @@
-[
-    {
-        "name": "MultiAssetProxy",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "Add MultiAssetProxy implementation",
-                "pr": 1224
-            }
-        ]
-    },
-    {
-        "name": "OrderValidator",
-        "version": "1.0.1",
-        "changes": [
-            {
-                "note": "remove `getApproved` check from ERC721 approval query",
-                "pr": 1149
-            }
-        ]
-    },
-    {
-        "name": "Forwarder",
-        "version": "1.1.0",
-        "changes": [
-            {
-                "note": "Round up when calculating remaining amounts in marketBuy functions",
-                "pr": 1162,
-                "networks": {
-                    "1": "0x5468a1dc173652ee28d249c271fa9933144746b1",
-                    "3": "0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
-                    "42": "0x17992e4ffb22730138e4b62aaa6367fa9d3699a6"
-                }
-            }
-        ]
-    },
-    {
-        "name": "Forwarder",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x7afc2d5107af94c462a194d2c21b5bdd238709d6",
-                    "3": "0x3983e204b12b3c02fb0638caf2cd406a62e0ead3",
-                    "42": "0xd85e2fa7e7e252b27b01bf0d65c946959d2f45b8"
-                }
-            }
-        ]
-    },
-    {
-        "name": "OrderValidator",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x9463e518dea6810309563c81d5266c1b1d149138",
-                    "3": "0x90431a90516ab49af23a0530e04e8c7836e7122f",
-                    "42": "0xb389da3d204b412df2f75c6afb3d0a7ce0bc283d"
-                }
-            }
-        ]
-    },
-    {
-        "name": "Exchange",
-        "version": "2.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x4f833a24e1f95d70f028921e27040ca56e09ab0b",
-                    "3": "0x4530c0483a1633c7a1c97d2c53721caff2caaaaf",
-                    "42": "0x35dd2932454449b14cee11a94d3674a936d5d7b2"
-                }
-            }
-        ]
-    },
-    {
-        "name": "ERC20Proxy",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
-                    "3": "0xb1408f4c245a23c31b98d2c626777d4c0d766caa",
-                    "42": "0xf1ec01d6236d3cd881a0bf0130ea25fe4234003e"
-                }
-            }
-        ]
-    },
-    {
-        "name": "ERC721Proxy",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x208e41fb445f1bb1b6780d58356e81405f3e6127",
-                    "3": "0xe654aac058bfbf9f83fcaee7793311dd82f6ddb4",
-                    "42": "0x2a9127c745688a165106c11cd4d647d2220af821"
-                }
-            }
-        ]
-    },
-    {
-        "name": "AssetProxyOwner",
-        "version": "1.0.0",
-        "changes": [
-            {
-                "note": "protocol v2 deploy",
-                "networks": {
-                    "1": "0x17992e4ffb22730138e4b62aaa6367fa9d3699a6",
-                    "3": "0xf5fa5b5fed2727a0e44ac67f6772e97977aa358b",
-                    "42": "0x2c824d2882baa668e0d5202b1e7f2922278703f8"
-                }
-            }
-        ]
-    }
-]
diff --git a/contracts/core/README.md b/contracts/core/README.md
deleted file mode 100644
index d055705c2..000000000
--- a/contracts/core/README.md
+++ /dev/null
@@ -1,74 +0,0 @@
-## Contracts
-
-Smart contracts that implement the 0x protocol. Addresses of the deployed contracts can be found in the 0x [wiki](https://0xproject.com/wiki#Deployed-Addresses) or the [CHANGELOG](./CHANGELOG.json) of this package.
-
-## Usage
-
-Contracts that make up and interact with version 2.0.0 of the protocol can be found in the [contracts](./contracts) directory. The contents of this directory are broken down into the following subdirectories:
-
-*   [protocol](./contracts/protocol)
-    *   This directory contains the contracts that make up version 2.0.0. A full specification can be found [here](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md).
-*   [test](./contracts/test)
-    *   This directory contains mocks and other contracts that are used solely for testing contracts within the other directories.
-
-## Bug bounty
-
-A bug bounty for the 2.0.0 contracts is ongoing! Instructions can be found [here](https://0xproject.com/wiki#Bug-Bounty).
-
-## Contributing
-
-We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
-
-For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein.
-
-Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
-
-### Install Dependencies
-
-If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
-
-```bash
-yarn config set workspaces-experimental true
-```
-
-Then install dependencies
-
-```bash
-yarn install
-```
-
-### Build
-
-To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
-
-```bash
-PKG=@0x/contracts-core yarn build
-```
-
-Or continuously rebuild on change:
-
-```bash
-PKG=@0x/contracts-core yarn watch
-```
-
-### Clean
-
-```bash
-yarn clean
-```
-
-### Lint
-
-```bash
-yarn lint
-```
-
-### Run Tests
-
-```bash
-yarn test
-```
-
-#### Testing options
-
-Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md).
diff --git a/contracts/core/compiler.json b/contracts/core/compiler.json
deleted file mode 100644
index 10e5bb0a1..000000000
--- a/contracts/core/compiler.json
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-    "artifactsDir": "./generated-artifacts",
-    "contractsDir": "./contracts",
-    "compilerSettings": {
-        "optimizer": {
-            "enabled": true,
-            "runs": 1000000
-        },
-        "outputSelection": {
-            "*": {
-                "*": [
-                    "abi",
-                    "evm.bytecode.object",
-                    "evm.bytecode.sourceMap",
-                    "evm.deployedBytecode.object",
-                    "evm.deployedBytecode.sourceMap"
-                ]
-            }
-        }
-    },
-    "contracts": [
-        "AssetProxyOwner",
-        "ERC20Proxy",
-        "ERC721Proxy",
-        "Exchange",
-        "MixinAuthorizable",
-        "MultiAssetProxy",
-        "TestAssetProxyOwner",
-        "TestAssetProxyDispatcher",
-        "TestExchangeInternals",
-        "TestSignatureValidator",
-        "TestStaticCallReceiver"
-    ]
-}
diff --git a/contracts/core/contracts/protocol/AssetProxy/ERC20Proxy.sol b/contracts/core/contracts/protocol/AssetProxy/ERC20Proxy.sol
deleted file mode 100644
index 258443bca..000000000
--- a/contracts/core/contracts/protocol/AssetProxy/ERC20Proxy.sol
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "./MixinAuthorizable.sol";
-
-
-contract ERC20Proxy is
-    MixinAuthorizable
-{
-    // Id of this proxy.
-    bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC20Token(address)"));
-    
-    // solhint-disable-next-line payable-fallback
-    function () 
-        external
-    {
-        assembly {
-            // The first 4 bytes of calldata holds the function selector
-            let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
-
-            // `transferFrom` will be called with the following parameters:
-            // assetData Encoded byte array.
-            // from Address to transfer asset from.
-            // to Address to transfer asset to.
-            // amount Amount of asset to transfer.
-            // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
-            if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
-
-                // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
-                // where k is the key left padded to 32 bytes and p is the storage slot
-                let start := mload(64)
-                mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff))
-                mstore(add(start, 32), authorized_slot)
-
-                // Revert if authorized[msg.sender] == false
-                if iszero(sload(keccak256(start, 64))) {
-                    // Revert with `Error("SENDER_NOT_AUTHORIZED")`
-                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                    mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
-                    mstore(96, 0)
-                    revert(0, 100)
-                }
-
-                // `transferFrom`.
-                // The function is marked `external`, so no abi decodeding is done for
-                // us. Instead, we expect the `calldata` memory to contain the
-                // following:
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 4 * 32  | function parameters:                |
-                // |          | 4      |         |   1. offset to assetData (*)        |
-                // |          | 36     |         |   2. from                           |
-                // |          | 68     |         |   3. to                             |
-                // |          | 100    |         |   4. amount                         |
-                // | Data     |        |         | assetData:                          |
-                // |          | 132    | 32      | assetData Length                    |
-                // |          | 164    | **      | assetData Contents                  |
-                //
-                // (*): offset is computed from start of function parameters, so offset
-                //      by an additional 4 bytes in the calldata.
-                //
-                // (**): see table below to compute length of assetData Contents
-                //
-                // WARNING: The ABIv2 specification allows additional padding between
-                //          the Params and Data section. This will result in a larger
-                //          offset to assetData.
-
-                // Asset data itself is encoded as follows:
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 1 * 32  | function parameters:                |
-                // |          | 4      | 12 + 20 |   1. token address                  |
-
-                // We construct calldata for the `token.transferFrom` ABI.
-                // The layout of this calldata is in the table below.
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 3 * 32  | function parameters:                |
-                // |          | 4      |         |   1. from                           |
-                // |          | 36     |         |   2. to                             |
-                // |          | 68     |         |   3. amount                         |
-
-                /////// Read token address from calldata ///////
-                // * The token address is stored in `assetData`.
-                //
-                // * The "offset to assetData" is stored at offset 4 in the calldata (table 1).
-                //   [assetDataOffsetFromParams = calldataload(4)]
-                //
-                // * Notes that the "offset to assetData" is relative to the "Params" area of calldata;
-                //   add 4 bytes to account for the length of the "Header" area (table 1).
-                //   [assetDataOffsetFromHeader = assetDataOffsetFromParams + 4]
-                //
-                // * The "token address" is offset 32+4=36 bytes into "assetData" (tables 1 & 2).
-                //   [tokenOffset = assetDataOffsetFromHeader + 36 = calldataload(4) + 4 + 36]
-                let token := calldataload(add(calldataload(4), 40))
-                
-                /////// Setup Header Area ///////
-                // This area holds the 4-byte `transferFrom` selector.
-                // Any trailing data in transferFromSelector will be
-                // overwritten in the next `mstore` call.
-                mstore(0, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
-                
-                /////// Setup Params Area ///////
-                // We copy the fields `from`, `to` and `amount` in bulk
-                // from our own calldata to the new calldata.
-                calldatacopy(4, 36, 96)
-
-                /////// Call `token.transferFrom` using the calldata ///////
-                let success := call(
-                    gas,            // forward all gas
-                    token,          // call address of token contract
-                    0,              // don't send any ETH
-                    0,              // pointer to start of input
-                    100,            // length of input
-                    0,              // write output over input
-                    32              // output size should be 32 bytes
-                )
-
-                /////// Check return data. ///////
-                // If there is no return data, we assume the token incorrectly
-                // does not return a bool. In this case we expect it to revert
-                // on failure, which was handled above.
-                // If the token does return data, we require that it is a single
-                // nonzero 32 bytes value.
-                // So the transfer succeeded if the call succeeded and either
-                // returned nothing, or returned a non-zero 32 byte value. 
-                success := and(success, or(
-                    iszero(returndatasize),
-                    and(
-                        eq(returndatasize, 32),
-                        gt(mload(0), 0)
-                    )
-                ))
-                if success {
-                    return(0, 0)
-                }
-                
-                // Revert with `Error("TRANSFER_FAILED")`
-                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000)
-                mstore(96, 0)
-                revert(0, 100)
-            }
-
-            // Revert if undefined function is called
-            revert(0, 0)
-        }
-    }
-
-    /// @dev Gets the proxy id associated with the proxy address.
-    /// @return Proxy id.
-    function getProxyId()
-        external
-        pure
-        returns (bytes4)
-    {
-        return PROXY_ID;
-    }
-}
diff --git a/contracts/core/contracts/protocol/AssetProxy/ERC721Proxy.sol b/contracts/core/contracts/protocol/AssetProxy/ERC721Proxy.sol
deleted file mode 100644
index 65b664b8b..000000000
--- a/contracts/core/contracts/protocol/AssetProxy/ERC721Proxy.sol
+++ /dev/null
@@ -1,171 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "./MixinAuthorizable.sol";
-
-
-contract ERC721Proxy is
-    MixinAuthorizable
-{
-    // Id of this proxy.
-    bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256)"));
-
-    // solhint-disable-next-line payable-fallback
-    function () 
-        external
-    {
-        assembly {
-            // The first 4 bytes of calldata holds the function selector
-            let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
-
-            // `transferFrom` will be called with the following parameters:
-            // assetData Encoded byte array.
-            // from Address to transfer asset from.
-            // to Address to transfer asset to.
-            // amount Amount of asset to transfer.
-            // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
-            if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
-
-                // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
-                // where k is the key left padded to 32 bytes and p is the storage slot
-                let start := mload(64)
-                mstore(start, and(caller, 0xffffffffffffffffffffffffffffffffffffffff))
-                mstore(add(start, 32), authorized_slot)
-
-                // Revert if authorized[msg.sender] == false
-                if iszero(sload(keccak256(start, 64))) {
-                    // Revert with `Error("SENDER_NOT_AUTHORIZED")`
-                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                    mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
-                    mstore(96, 0)
-                    revert(0, 100)
-                }
-
-                // `transferFrom`.
-                // The function is marked `external`, so no abi decodeding is done for
-                // us. Instead, we expect the `calldata` memory to contain the
-                // following:
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 4 * 32  | function parameters:                |
-                // |          | 4      |         |   1. offset to assetData (*)        |
-                // |          | 36     |         |   2. from                           |
-                // |          | 68     |         |   3. to                             |
-                // |          | 100    |         |   4. amount                         |
-                // | Data     |        |         | assetData:                          |
-                // |          | 132    | 32      | assetData Length                    |
-                // |          | 164    | **      | assetData Contents                  |
-                //
-                // (*): offset is computed from start of function parameters, so offset
-                //      by an additional 4 bytes in the calldata.
-                //
-                // (**): see table below to compute length of assetData Contents
-                //
-                // WARNING: The ABIv2 specification allows additional padding between
-                //          the Params and Data section. This will result in a larger
-                //          offset to assetData.
-
-                // Asset data itself is encoded as follows:
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 2 * 32  | function parameters:                |
-                // |          | 4      | 12 + 20 |   1. token address                  |
-                // |          | 36     |         |   2. tokenId                        |
-                
-                // We construct calldata for the `token.transferFrom` ABI.
-                // The layout of this calldata is in the table below.
-                // 
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 3 * 32  | function parameters:                |
-                // |          | 4      |         |   1. from                           |
-                // |          | 36     |         |   2. to                             |
-                // |          | 68     |         |   3. tokenId                        |
-
-                // There exists only 1 of each token.
-                // require(amount == 1, "INVALID_AMOUNT")
-                if sub(calldataload(100), 1) {
-                    // Revert with `Error("INVALID_AMOUNT")`
-                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                    mstore(64, 0x0000000e494e56414c49445f414d4f554e540000000000000000000000000000)
-                    mstore(96, 0)
-                    revert(0, 100)
-                }
-
-                /////// Setup Header Area ///////
-                // This area holds the 4-byte `transferFrom` selector.
-                // Any trailing data in transferFromSelector will be
-                // overwritten in the next `mstore` call.
-                mstore(0, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
-                
-                /////// Setup Params Area ///////
-                // We copy the fields `from` and `to` in bulk
-                // from our own calldata to the new calldata.
-                calldatacopy(4, 36, 64)
-
-                // Copy `tokenId` field from our own calldata to the new calldata.
-                let assetDataOffset := calldataload(4)
-                calldatacopy(68, add(assetDataOffset, 72), 32)
-
-                /////// Call `token.transferFrom` using the calldata ///////
-                let token := calldataload(add(assetDataOffset, 40))
-                let success := call(
-                    gas,            // forward all gas
-                    token,          // call address of token contract
-                    0,              // don't send any ETH
-                    0,              // pointer to start of input
-                    100,            // length of input
-                    0,              // write output to null
-                    0               // output size is 0 bytes
-                )
-                if success {
-                    return(0, 0)
-                }
-                
-                // Revert with `Error("TRANSFER_FAILED")`
-                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                mstore(64, 0x0000000f5452414e534645525f4641494c454400000000000000000000000000)
-                mstore(96, 0)
-                revert(0, 100)
-            }
-
-            // Revert if undefined function is called
-            revert(0, 0)
-        }
-    }
-
-    /// @dev Gets the proxy id associated with the proxy address.
-    /// @return Proxy id.
-    function getProxyId()
-        external
-        pure
-        returns (bytes4)
-    {
-        return PROXY_ID;
-    }
-}
diff --git a/contracts/core/contracts/protocol/AssetProxy/MixinAuthorizable.sol b/contracts/core/contracts/protocol/AssetProxy/MixinAuthorizable.sol
deleted file mode 100644
index 08f9b94dc..000000000
--- a/contracts/core/contracts/protocol/AssetProxy/MixinAuthorizable.sol
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-utils/contracts/utils/Ownable/Ownable.sol";
-import "./mixins/MAuthorizable.sol";
-
-
-contract MixinAuthorizable is
-    Ownable,
-    MAuthorizable
-{
-    /// @dev Only authorized addresses can invoke functions with this modifier.
-    modifier onlyAuthorized {
-        require(
-            authorized[msg.sender],
-            "SENDER_NOT_AUTHORIZED"
-        );
-        _;
-    }
-
-    mapping (address => bool) public authorized;
-    address[] public authorities;
-
-    /// @dev Authorizes an address.
-    /// @param target Address to authorize.
-    function addAuthorizedAddress(address target)
-        external
-        onlyOwner
-    {
-        require(
-            !authorized[target],
-            "TARGET_ALREADY_AUTHORIZED"
-        );
-
-        authorized[target] = true;
-        authorities.push(target);
-        emit AuthorizedAddressAdded(target, msg.sender);
-    }
-
-    /// @dev Removes authorizion of an address.
-    /// @param target Address to remove authorization from.
-    function removeAuthorizedAddress(address target)
-        external
-        onlyOwner
-    {
-        require(
-            authorized[target],
-            "TARGET_NOT_AUTHORIZED"
-        );
-
-        delete authorized[target];
-        for (uint256 i = 0; i < authorities.length; i++) {
-            if (authorities[i] == target) {
-                authorities[i] = authorities[authorities.length - 1];
-                authorities.length -= 1;
-                break;
-            }
-        }
-        emit AuthorizedAddressRemoved(target, msg.sender);
-    }
-
-    /// @dev Removes authorizion of an address.
-    /// @param target Address to remove authorization from.
-    /// @param index Index of target in authorities array.
-    function removeAuthorizedAddressAtIndex(
-        address target,
-        uint256 index
-    )
-        external
-        onlyOwner
-    {
-        require(
-            authorized[target],
-            "TARGET_NOT_AUTHORIZED"
-        );
-        require(
-            index < authorities.length,
-            "INDEX_OUT_OF_BOUNDS"
-        );
-        require(
-            authorities[index] == target,
-            "AUTHORIZED_ADDRESS_MISMATCH"
-        );
-
-        delete authorized[target];
-        authorities[index] = authorities[authorities.length - 1];
-        authorities.length -= 1;
-        emit AuthorizedAddressRemoved(target, msg.sender);
-    }
-
-    /// @dev Gets all authorized addresses.
-    /// @return Array of authorized addresses.
-    function getAuthorizedAddresses()
-        external
-        view
-        returns (address[] memory)
-    {
-        return authorities;
-    }
-}
diff --git a/contracts/core/contracts/protocol/AssetProxy/MultiAssetProxy.sol b/contracts/core/contracts/protocol/AssetProxy/MultiAssetProxy.sol
deleted file mode 100644
index 42231e73b..000000000
--- a/contracts/core/contracts/protocol/AssetProxy/MultiAssetProxy.sol
+++ /dev/null
@@ -1,300 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "../Exchange/MixinAssetProxyDispatcher.sol";
-import "./MixinAuthorizable.sol";
-
-
-contract MultiAssetProxy is
-    MixinAssetProxyDispatcher,
-    MixinAuthorizable
-{
-    // Id of this proxy.
-    bytes4 constant internal PROXY_ID = bytes4(keccak256("MultiAsset(uint256[],bytes[])"));
-
-    // solhint-disable-next-line payable-fallback
-    function ()
-        external
-    {
-        assembly {
-            // The first 4 bytes of calldata holds the function selector
-            let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
-
-            // `transferFrom` will be called with the following parameters:
-            // assetData Encoded byte array.
-            // from Address to transfer asset from.
-            // to Address to transfer asset to.
-            // amount Amount of asset to transfer.
-            // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
-            if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
-
-                // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
-                // where k is the key left padded to 32 bytes and p is the storage slot
-                mstore(0, caller)
-                mstore(32, authorized_slot)
-
-                // Revert if authorized[msg.sender] == false
-                if iszero(sload(keccak256(0, 64))) {
-                    // Revert with `Error("SENDER_NOT_AUTHORIZED")`
-                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                    mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
-                    mstore(96, 0)
-                    revert(0, 100)
-                }
-
-                // `transferFrom`.
-                // The function is marked `external`, so no abi decoding is done for
-                // us. Instead, we expect the `calldata` memory to contain the
-                // following:
-                //
-                // | Area     | Offset | Length  | Contents                            |
-                // |----------|--------|---------|-------------------------------------|
-                // | Header   | 0      | 4       | function selector                   |
-                // | Params   |        | 4 * 32  | function parameters:                |
-                // |          | 4      |         |   1. offset to assetData (*)        |
-                // |          | 36     |         |   2. from                           |
-                // |          | 68     |         |   3. to                             |
-                // |          | 100    |         |   4. amount                         |
-                // | Data     |        |         | assetData:                          |
-                // |          | 132    | 32      | assetData Length                    |
-                // |          | 164    | **      | assetData Contents                  |
-                //
-                // (*): offset is computed from start of function parameters, so offset
-                //      by an additional 4 bytes in the calldata.
-                //
-                // (**): see table below to compute length of assetData Contents
-                //
-                // WARNING: The ABIv2 specification allows additional padding between
-                //          the Params and Data section. This will result in a larger
-                //          offset to assetData.
-
-                // Load offset to `assetData`
-                let assetDataOffset := calldataload(4)
-
-                // Asset data itself is encoded as follows:
-                //
-                // | Area     | Offset      | Length  | Contents                            |
-                // |----------|-------------|---------|-------------------------------------|
-                // | Header   | 0           | 4       | assetProxyId                        |
-                // | Params   |             | 2 * 32  | function parameters:                |
-                // |          | 4           |         |   1. offset to amounts (*)          |
-                // |          | 36          |         |   2. offset to nestedAssetData (*)  |
-                // | Data     |             |         | amounts:                            |
-                // |          | 68          | 32      | amounts Length                      |
-                // |          | 100         | a       | amounts Contents                    | 
-                // |          |             |         | nestedAssetData:                    |
-                // |          | 100 + a     | 32      | nestedAssetData Length              |
-                // |          | 132 + a     | b       | nestedAssetData Contents (offsets)  |
-                // |          | 132 + a + b |         | nestedAssetData[0, ..., len]        |
-
-                // In order to find the offset to `amounts`, we must add:
-                // 4 (function selector)
-                // + assetDataOffset
-                // + 32 (assetData len)
-                // + 4 (assetProxyId)
-                let amountsOffset := calldataload(add(assetDataOffset, 40))
-
-                // In order to find the offset to `nestedAssetData`, we must add:
-                // 4 (function selector)
-                // + assetDataOffset
-                // + 32 (assetData len)
-                // + 4 (assetProxyId)
-                // + 32 (amounts offset)
-                let nestedAssetDataOffset := calldataload(add(assetDataOffset, 72))
-
-                // In order to find the start of the `amounts` contents, we must add: 
-                // 4 (function selector) 
-                // + assetDataOffset 
-                // + 32 (assetData len)
-                // + 4 (assetProxyId)
-                // + amountsOffset
-                // + 32 (amounts len)
-                let amountsContentsStart := add(assetDataOffset, add(amountsOffset, 72))
-
-                // Load number of elements in `amounts`
-                let amountsLen := calldataload(sub(amountsContentsStart, 32))
-
-                // In order to find the start of the `nestedAssetData` contents, we must add: 
-                // 4 (function selector) 
-                // + assetDataOffset 
-                // + 32 (assetData len)
-                // + 4 (assetProxyId)
-                // + nestedAssetDataOffset
-                // + 32 (nestedAssetData len)
-                let nestedAssetDataContentsStart := add(assetDataOffset, add(nestedAssetDataOffset, 72))
-
-                // Load number of elements in `nestedAssetData`
-                let nestedAssetDataLen := calldataload(sub(nestedAssetDataContentsStart, 32))
-
-                // Revert if number of elements in `amounts` differs from number of elements in `nestedAssetData`
-                if iszero(eq(amountsLen, nestedAssetDataLen)) {
-                    // Revert with `Error("LENGTH_MISMATCH")`
-                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                    mstore(64, 0x0000000f4c454e4754485f4d49534d4154434800000000000000000000000000)
-                    mstore(96, 0)
-                    revert(0, 100)
-                }
-
-                // Copy `transferFrom` selector, offset to `assetData`, `from`, and `to` from calldata to memory
-                calldatacopy(
-                    0,   // memory can safely be overwritten from beginning
-                    0,   // start of calldata
-                    100  // length of selector (4) and 3 params (32 * 3)
-                )
-
-                // Overwrite existing offset to `assetData` with our own
-                mstore(4, 128)
-                
-                // Load `amount`
-                let amount := calldataload(100)
-        
-                // Calculate number of bytes in `amounts` contents
-                let amountsByteLen := mul(amountsLen, 32)
-
-                // Initialize `assetProxyId` and `assetProxy` to 0
-                let assetProxyId := 0
-                let assetProxy := 0
-
-                // Loop through `amounts` and `nestedAssetData`, calling `transferFrom` for each respective element
-                for {let i := 0} lt(i, amountsByteLen) {i := add(i, 32)} {
-
-                    // Calculate the total amount
-                    let amountsElement := calldataload(add(amountsContentsStart, i))
-                    let totalAmount := mul(amountsElement, amount)
-
-                    // Revert if multiplication resulted in an overflow
-                    if iszero(eq(div(totalAmount, amount), amountsElement)) {
-                        // Revert with `Error("UINT256_OVERFLOW")`
-                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                        mstore(64, 0x0000001055494e543235365f4f564552464c4f57000000000000000000000000)
-                        mstore(96, 0)
-                        revert(0, 100)
-                    }
-
-                    // Write `totalAmount` to memory
-                    mstore(100, totalAmount)
-
-                    // Load offset to `nestedAssetData[i]`
-                    let nestedAssetDataElementOffset := calldataload(add(nestedAssetDataContentsStart, i))
-
-                    // In order to find the start of the `nestedAssetData[i]` contents, we must add:
-                    // 4 (function selector) 
-                    // + assetDataOffset 
-                    // + 32 (assetData len)
-                    // + 4 (assetProxyId)
-                    // + nestedAssetDataOffset
-                    // + 32 (nestedAssetData len)
-                    // + nestedAssetDataElementOffset
-                    // + 32 (nestedAssetDataElement len)
-                    let nestedAssetDataElementContentsStart := add(assetDataOffset, add(nestedAssetDataOffset, add(nestedAssetDataElementOffset, 104)))
-
-                    // Load length of `nestedAssetData[i]`
-                    let nestedAssetDataElementLenStart := sub(nestedAssetDataElementContentsStart, 32)
-                    let nestedAssetDataElementLen := calldataload(nestedAssetDataElementLenStart)
-
-                    // Revert if the `nestedAssetData` does not contain a 4 byte `assetProxyId`
-                    if lt(nestedAssetDataElementLen, 4) {
-                        // Revert with `Error("LENGTH_GREATER_THAN_3_REQUIRED")`
-                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                        mstore(64, 0x0000001e4c454e4754485f475245415445525f5448414e5f335f524551554952)
-                        mstore(96, 0x4544000000000000000000000000000000000000000000000000000000000000)
-                        revert(0, 100)
-                    }
-
-                    // Load AssetProxy id
-                    let currentAssetProxyId := and(
-                        calldataload(nestedAssetDataElementContentsStart),
-                        0xffffffff00000000000000000000000000000000000000000000000000000000
-                    )
-
-                    // Only load `assetProxy` if `currentAssetProxyId` does not equal `assetProxyId`
-                    // We do not need to check if `currentAssetProxyId` is 0 since `assetProxy` is also initialized to 0
-                    if iszero(eq(currentAssetProxyId, assetProxyId)) {
-                        // Update `assetProxyId`
-                        assetProxyId := currentAssetProxyId
-                        // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
-                        // where k is the key left padded to 32 bytes and p is the storage slot
-                        mstore(132, assetProxyId)
-                        mstore(164, assetProxies_slot)
-                        assetProxy := sload(keccak256(132, 64))
-                    }
-                    
-                    // Revert if AssetProxy with given id does not exist
-                    if iszero(assetProxy) {
-                        // Revert with `Error("ASSET_PROXY_DOES_NOT_EXIST")`
-                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                        mstore(64, 0x0000001a41535345545f50524f58595f444f45535f4e4f545f45584953540000)
-                        mstore(96, 0)
-                        revert(0, 100)
-                    }
-    
-                    // Copy `nestedAssetData[i]` from calldata to memory
-                    calldatacopy(
-                        132,                                // memory slot after `amounts[i]`
-                        nestedAssetDataElementLenStart,     // location of `nestedAssetData[i]` in calldata
-                        add(nestedAssetDataElementLen, 32)  // `nestedAssetData[i].length` plus 32 byte length
-                    )
-
-                    // call `assetProxy.transferFrom`
-                    let success := call(
-                        gas,                                    // forward all gas
-                        assetProxy,                             // call address of asset proxy
-                        0,                                      // don't send any ETH
-                        0,                                      // pointer to start of input
-                        add(164, nestedAssetDataElementLen),    // length of input  
-                        0,                                      // write output over memory that won't be reused
-                        0                                       // don't copy output to memory
-                    )
-
-                    // Revert with reason given by AssetProxy if `transferFrom` call failed
-                    if iszero(success) {
-                        returndatacopy(
-                            0,                // copy to memory at 0
-                            0,                // copy from return data at 0
-                            returndatasize()  // copy all return data
-                        )
-                        revert(0, returndatasize())
-                    }
-                }
-
-                // Return if no `transferFrom` calls reverted
-                return(0, 0)
-            }
-
-            // Revert if undefined function is called
-            revert(0, 0)
-        }
-    }
-
-    /// @dev Gets the proxy id associated with the proxy address.
-    /// @return Proxy id.
-    function getProxyId()
-        external
-        pure
-        returns (bytes4)
-    {
-        return PROXY_ID;
-    }
-}
diff --git a/contracts/core/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol b/contracts/core/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol
deleted file mode 100644
index fe77048ce..000000000
--- a/contracts/core/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-interfaces/contracts/protocol/AssetProxy/IAuthorizable.sol";
-
-
-contract MAuthorizable is
-    IAuthorizable
-{
-    // Event logged when a new address is authorized.
-    event AuthorizedAddressAdded(
-        address indexed target,
-        address indexed caller
-    );
-
-    // Event logged when a currently authorized address is unauthorized.
-    event AuthorizedAddressRemoved(
-        address indexed target,
-        address indexed caller
-    );
-
-    /// @dev Only authorized addresses can invoke functions with this modifier.
-    modifier onlyAuthorized { revert(); _; }
-}
diff --git a/contracts/core/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol b/contracts/core/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol
deleted file mode 100644
index bfc7b5a66..000000000
--- a/contracts/core/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol
+++ /dev/null
@@ -1,108 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-multisig/contracts/multisig/MultiSigWalletWithTimeLock.sol";
-import "@0x/contracts-utils/contracts/utils/LibBytes/LibBytes.sol";
-
-
-contract AssetProxyOwner is
-    MultiSigWalletWithTimeLock
-{
-    using LibBytes for bytes;
-
-    event AssetProxyRegistration(address assetProxyContract, bool isRegistered);
-
-    // Mapping of AssetProxy contract address =>
-    // if this contract is allowed to call the AssetProxy's `removeAuthorizedAddressAtIndex` method without a time lock.
-    mapping (address => bool) public isAssetProxyRegistered;
-
-    bytes4 constant internal REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR = bytes4(keccak256("removeAuthorizedAddressAtIndex(address,uint256)"));
-
-    /// @dev Function will revert if the transaction does not call `removeAuthorizedAddressAtIndex`
-    ///      on an approved AssetProxy contract.
-    modifier validRemoveAuthorizedAddressAtIndexTx(uint256 transactionId) {
-        Transaction storage txn = transactions[transactionId];
-        require(
-            isAssetProxyRegistered[txn.destination],
-            "UNREGISTERED_ASSET_PROXY"
-        );
-        require(
-            txn.data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR,
-            "INVALID_FUNCTION_SELECTOR"
-        );
-        _;
-    }
-
-    /// @dev Contract constructor sets initial owners, required number of confirmations,
-    ///      time lock, and list of AssetProxy addresses.
-    /// @param _owners List of initial owners.
-    /// @param _assetProxyContracts Array of AssetProxy contract addresses.
-    /// @param _required Number of required confirmations.
-    /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
-    constructor (
-        address[] memory _owners,
-        address[] memory _assetProxyContracts,
-        uint256 _required,
-        uint256 _secondsTimeLocked
-    )
-        public
-        MultiSigWalletWithTimeLock(_owners, _required, _secondsTimeLocked)
-    {
-        for (uint256 i = 0; i < _assetProxyContracts.length; i++) {
-            address assetProxy = _assetProxyContracts[i];
-            require(
-                assetProxy != address(0),
-                "INVALID_ASSET_PROXY"
-            );
-            isAssetProxyRegistered[assetProxy] = true;
-        }
-    }
-
-    /// @dev Registers or deregisters an AssetProxy to be able to execute
-    ///      `removeAuthorizedAddressAtIndex` without a timelock.
-    /// @param assetProxyContract Address of AssetProxy contract.
-    /// @param isRegistered Status of approval for AssetProxy contract.
-    function registerAssetProxy(address assetProxyContract, bool isRegistered)
-        public
-        onlyWallet
-        notNull(assetProxyContract)
-    {
-        isAssetProxyRegistered[assetProxyContract] = isRegistered;
-        emit AssetProxyRegistration(assetProxyContract, isRegistered);
-    }
-
-    /// @dev Allows execution of `removeAuthorizedAddressAtIndex` without time lock.
-    /// @param transactionId Transaction ID.
-    function executeRemoveAuthorizedAddressAtIndex(uint256 transactionId)
-        public
-        notExecuted(transactionId)
-        fullyConfirmed(transactionId)
-        validRemoveAuthorizedAddressAtIndexTx(transactionId)
-    {
-        Transaction storage txn = transactions[transactionId];
-        txn.executed = true;
-        if (external_call(txn.destination, txn.value, txn.data.length, txn.data)) {
-            emit Execution(transactionId);
-        } else {
-            emit ExecutionFailure(transactionId);
-            txn.executed = false;
-        }
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/Exchange.sol b/contracts/core/contracts/protocol/Exchange/Exchange.sol
deleted file mode 100644
index 65ca742ea..000000000
--- a/contracts/core/contracts/protocol/Exchange/Exchange.sol
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-libs/contracts/libs/LibConstants.sol";
-import "./MixinExchangeCore.sol";
-import "./MixinSignatureValidator.sol";
-import "./MixinWrapperFunctions.sol";
-import "./MixinAssetProxyDispatcher.sol";
-import "./MixinTransactions.sol";
-import "./MixinMatchOrders.sol";
-
-
-// solhint-disable no-empty-blocks
-contract Exchange is
-    MixinExchangeCore,
-    MixinMatchOrders,
-    MixinSignatureValidator,
-    MixinTransactions,
-    MixinAssetProxyDispatcher,
-    MixinWrapperFunctions
-{
-    string constant public VERSION = "2.0.1-alpha";
-
-    // Mixins are instantiated in the order they are inherited
-    constructor (bytes memory _zrxAssetData)
-        public
-        LibConstants(_zrxAssetData) // @TODO: Remove when we deploy.
-        MixinExchangeCore()
-        MixinMatchOrders()
-        MixinSignatureValidator()
-        MixinTransactions()
-        MixinAssetProxyDispatcher()
-        MixinWrapperFunctions()
-    {}
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol b/contracts/core/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol
deleted file mode 100644
index 36ab39b45..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol
+++ /dev/null
@@ -1,174 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-utils/contracts/utils/Ownable/Ownable.sol";
-import "./mixins/MAssetProxyDispatcher.sol";
-import "@0x/contracts-interfaces/contracts/protocol/AssetProxy/IAssetProxy.sol";
-
-
-contract MixinAssetProxyDispatcher is
-    Ownable,
-    MAssetProxyDispatcher
-{
-    // Mapping from Asset Proxy Id's to their respective Asset Proxy
-    mapping (bytes4 => IAssetProxy) public assetProxies;
-
-    /// @dev Registers an asset proxy to its asset proxy id.
-    ///      Once an asset proxy is registered, it cannot be unregistered.
-    /// @param assetProxy Address of new asset proxy to register.
-    function registerAssetProxy(address assetProxy)
-        external
-        onlyOwner
-    {
-        IAssetProxy assetProxyContract = IAssetProxy(assetProxy);
-
-        // Ensure that no asset proxy exists with current id.
-        bytes4 assetProxyId = assetProxyContract.getProxyId();
-        address currentAssetProxy = assetProxies[assetProxyId];
-        require(
-            currentAssetProxy == address(0),
-            "ASSET_PROXY_ALREADY_EXISTS"
-        );
-
-        // Add asset proxy and log registration.
-        assetProxies[assetProxyId] = assetProxyContract;
-        emit AssetProxyRegistered(
-            assetProxyId,
-            assetProxy
-        );
-    }
-
-    /// @dev Gets an asset proxy.
-    /// @param assetProxyId Id of the asset proxy.
-    /// @return The asset proxy registered to assetProxyId. Returns 0x0 if no proxy is registered.
-    function getAssetProxy(bytes4 assetProxyId)
-        external
-        view
-        returns (address)
-    {
-        return assetProxies[assetProxyId];
-    }
-
-    /// @dev Forwards arguments to assetProxy and calls `transferFrom`. Either succeeds or throws.
-    /// @param assetData Byte array encoded for the asset.
-    /// @param from Address to transfer token from.
-    /// @param to Address to transfer token to.
-    /// @param amount Amount of token to transfer.
-    function dispatchTransferFrom(
-        bytes memory assetData,
-        address from,
-        address to,
-        uint256 amount
-    )
-        internal
-    {
-        // Do nothing if no amount should be transferred.
-        if (amount > 0 && from != to) {
-            // Ensure assetData length is valid
-            require(
-                assetData.length > 3,
-                "LENGTH_GREATER_THAN_3_REQUIRED"
-            );
-            
-            // Lookup assetProxy. We do not use `LibBytes.readBytes4` for gas efficiency reasons.
-            bytes4 assetProxyId;
-            assembly {
-                assetProxyId := and(mload(
-                    add(assetData, 32)),
-                    0xFFFFFFFF00000000000000000000000000000000000000000000000000000000
-                )
-            }
-            address assetProxy = assetProxies[assetProxyId];
-
-            // Ensure that assetProxy exists
-            require(
-                assetProxy != address(0),
-                "ASSET_PROXY_DOES_NOT_EXIST"
-            );
-            
-            // We construct calldata for the `assetProxy.transferFrom` ABI.
-            // The layout of this calldata is in the table below.
-            // 
-            // | Area     | Offset | Length  | Contents                                    |
-            // | -------- |--------|---------|-------------------------------------------- |
-            // | Header   | 0      | 4       | function selector                           |
-            // | Params   |        | 4 * 32  | function parameters:                        |
-            // |          | 4      |         |   1. offset to assetData (*)                |
-            // |          | 36     |         |   2. from                                   |
-            // |          | 68     |         |   3. to                                     |
-            // |          | 100    |         |   4. amount                                 |
-            // | Data     |        |         | assetData:                                  |
-            // |          | 132    | 32      | assetData Length                            |
-            // |          | 164    | **      | assetData Contents                          |
-
-            assembly {
-                /////// Setup State ///////
-                // `cdStart` is the start of the calldata for `assetProxy.transferFrom` (equal to free memory ptr).
-                let cdStart := mload(64)
-                // `dataAreaLength` is the total number of words needed to store `assetData`
-                //  As-per the ABI spec, this value is padded up to the nearest multiple of 32,
-                //  and includes 32-bytes for length.
-                let dataAreaLength := and(add(mload(assetData), 63), 0xFFFFFFFFFFFE0)
-                // `cdEnd` is the end of the calldata for `assetProxy.transferFrom`.
-                let cdEnd := add(cdStart, add(132, dataAreaLength))
-
-                
-                /////// Setup Header Area ///////
-                // This area holds the 4-byte `transferFromSelector`.
-                // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
-                mstore(cdStart, 0xa85e59e400000000000000000000000000000000000000000000000000000000)
-                
-                /////// Setup Params Area ///////
-                // Each parameter is padded to 32-bytes. The entire Params Area is 128 bytes.
-                // Notes:
-                //   1. The offset to `assetData` is the length of the Params Area (128 bytes).
-                //   2. A 20-byte mask is applied to addresses to zero-out the unused bytes.
-                mstore(add(cdStart, 4), 128)
-                mstore(add(cdStart, 36), and(from, 0xffffffffffffffffffffffffffffffffffffffff))
-                mstore(add(cdStart, 68), and(to, 0xffffffffffffffffffffffffffffffffffffffff))
-                mstore(add(cdStart, 100), amount)
-                
-                /////// Setup Data Area ///////
-                // This area holds `assetData`.
-                let dataArea := add(cdStart, 132)
-                // solhint-disable-next-line no-empty-blocks
-                for {} lt(dataArea, cdEnd) {} {
-                    mstore(dataArea, mload(assetData))
-                    dataArea := add(dataArea, 32)
-                    assetData := add(assetData, 32)
-                }
-
-                /////// Call `assetProxy.transferFrom` using the constructed calldata ///////
-                let success := call(
-                    gas,                    // forward all gas
-                    assetProxy,             // call address of asset proxy
-                    0,                      // don't send any ETH
-                    cdStart,                // pointer to start of input
-                    sub(cdEnd, cdStart),    // length of input  
-                    cdStart,                // write output over input
-                    512                     // reserve 512 bytes for output
-                )
-                if iszero(success) {
-                    revert(cdStart, returndatasize())
-                }
-            }
-        }
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinExchangeCore.sol b/contracts/core/contracts/protocol/Exchange/MixinExchangeCore.sol
deleted file mode 100644
index 68d6a3897..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinExchangeCore.sol
+++ /dev/null
@@ -1,529 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol";
-import "@0x/contracts-libs/contracts/libs/LibConstants.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibMath.sol";
-import "./mixins/MExchangeCore.sol";
-import "./mixins/MSignatureValidator.sol";
-import "./mixins/MTransactions.sol";
-import "./mixins/MAssetProxyDispatcher.sol";
-
-
-contract MixinExchangeCore is
-    ReentrancyGuard,
-    LibConstants,
-    LibMath,
-    LibOrder,
-    LibFillResults,
-    MAssetProxyDispatcher,
-    MExchangeCore,
-    MSignatureValidator,
-    MTransactions
-{
-    // Mapping of orderHash => amount of takerAsset already bought by maker
-    mapping (bytes32 => uint256) public filled;
-
-    // Mapping of orderHash => cancelled
-    mapping (bytes32 => bool) public cancelled;
-
-    // Mapping of makerAddress => senderAddress => lowest salt an order can have in order to be fillable
-    // Orders with specified senderAddress and with a salt less than their epoch are considered cancelled
-    mapping (address => mapping (address => uint256)) public orderEpoch;
-
-    /// @dev Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch
-    ///      and senderAddress equal to msg.sender (or null address if msg.sender == makerAddress).
-    /// @param targetOrderEpoch Orders created with a salt less or equal to this value will be cancelled.
-    function cancelOrdersUpTo(uint256 targetOrderEpoch)
-        external
-        nonReentrant
-    {
-        address makerAddress = getCurrentContextAddress();
-        // If this function is called via `executeTransaction`, we only update the orderEpoch for the makerAddress/msg.sender combination.
-        // This allows external filter contracts to add rules to how orders are cancelled via this function.
-        address senderAddress = makerAddress == msg.sender ? address(0) : msg.sender;
-
-        // orderEpoch is initialized to 0, so to cancelUpTo we need salt + 1
-        uint256 newOrderEpoch = targetOrderEpoch + 1;  
-        uint256 oldOrderEpoch = orderEpoch[makerAddress][senderAddress];
-
-        // Ensure orderEpoch is monotonically increasing
-        require(
-            newOrderEpoch > oldOrderEpoch, 
-            "INVALID_NEW_ORDER_EPOCH"
-        );
-
-        // Update orderEpoch
-        orderEpoch[makerAddress][senderAddress] = newOrderEpoch;
-        emit CancelUpTo(
-            makerAddress,
-            senderAddress,
-            newOrderEpoch
-        );
-    }
-
-    /// @dev Fills the input order.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    /// @return Amounts filled and fees paid by maker and taker.
-    function fillOrder(
-        Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        public
-        nonReentrant
-        returns (FillResults memory fillResults)
-    {
-        fillResults = fillOrderInternal(
-            order,
-            takerAssetFillAmount,
-            signature
-        );
-        return fillResults;
-    }
-
-    /// @dev After calling, the order can not be filled anymore.
-    ///      Throws if order is invalid or sender does not have permission to cancel.
-    /// @param order Order to cancel. Order must be OrderStatus.FILLABLE.
-    function cancelOrder(Order memory order)
-        public
-        nonReentrant
-    {
-        cancelOrderInternal(order);
-    }
-
-    /// @dev Gets information about an order: status, hash, and amount filled.
-    /// @param order Order to gather information on.
-    /// @return OrderInfo Information about the order and its state.
-    ///         See LibOrder.OrderInfo for a complete description.
-    function getOrderInfo(Order memory order)
-        public
-        view
-        returns (OrderInfo memory orderInfo)
-    {
-        // Compute the order hash
-        orderInfo.orderHash = getOrderHash(order);
-
-        // Fetch filled amount
-        orderInfo.orderTakerAssetFilledAmount = filled[orderInfo.orderHash];
-
-        // If order.makerAssetAmount is zero, we also reject the order.
-        // While the Exchange contract handles them correctly, they create
-        // edge cases in the supporting infrastructure because they have
-        // an 'infinite' price when computed by a simple division.
-        if (order.makerAssetAmount == 0) {
-            orderInfo.orderStatus = uint8(OrderStatus.INVALID_MAKER_ASSET_AMOUNT);
-            return orderInfo;
-        }
-
-        // If order.takerAssetAmount is zero, then the order will always
-        // be considered filled because 0 == takerAssetAmount == orderTakerAssetFilledAmount
-        // Instead of distinguishing between unfilled and filled zero taker
-        // amount orders, we choose not to support them.
-        if (order.takerAssetAmount == 0) {
-            orderInfo.orderStatus = uint8(OrderStatus.INVALID_TAKER_ASSET_AMOUNT);
-            return orderInfo;
-        }
-
-        // Validate order availability
-        if (orderInfo.orderTakerAssetFilledAmount >= order.takerAssetAmount) {
-            orderInfo.orderStatus = uint8(OrderStatus.FULLY_FILLED);
-            return orderInfo;
-        }
-
-        // Validate order expiration
-        // solhint-disable-next-line not-rely-on-time
-        if (block.timestamp >= order.expirationTimeSeconds) {
-            orderInfo.orderStatus = uint8(OrderStatus.EXPIRED);
-            return orderInfo;
-        }
-
-        // Check if order has been cancelled
-        if (cancelled[orderInfo.orderHash]) {
-            orderInfo.orderStatus = uint8(OrderStatus.CANCELLED);
-            return orderInfo;
-        }
-        if (orderEpoch[order.makerAddress][order.senderAddress] > order.salt) {
-            orderInfo.orderStatus = uint8(OrderStatus.CANCELLED);
-            return orderInfo;
-        }
-
-        // All other statuses are ruled out: order is Fillable
-        orderInfo.orderStatus = uint8(OrderStatus.FILLABLE);
-        return orderInfo;
-    }
-
-    /// @dev Fills the input order.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    /// @return Amounts filled and fees paid by maker and taker.
-    function fillOrderInternal(
-        Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        internal
-        returns (FillResults memory fillResults)
-    {
-        // Fetch order info
-        OrderInfo memory orderInfo = getOrderInfo(order);
-
-        // Fetch taker address
-        address takerAddress = getCurrentContextAddress();
-        
-        // Assert that the order is fillable by taker
-        assertFillableOrder(
-            order,
-            orderInfo,
-            takerAddress,
-            signature
-        );
-        
-        // Get amount of takerAsset to fill
-        uint256 remainingTakerAssetAmount = safeSub(order.takerAssetAmount, orderInfo.orderTakerAssetFilledAmount);
-        uint256 takerAssetFilledAmount = min256(takerAssetFillAmount, remainingTakerAssetAmount);
-
-        // Validate context
-        assertValidFill(
-            order,
-            orderInfo,
-            takerAssetFillAmount,
-            takerAssetFilledAmount,
-            fillResults.makerAssetFilledAmount
-        );
-
-        // Compute proportional fill amounts
-        fillResults = calculateFillResults(order, takerAssetFilledAmount);
-
-        // Update exchange internal state
-        updateFilledState(
-            order,
-            takerAddress,
-            orderInfo.orderHash,
-            orderInfo.orderTakerAssetFilledAmount,
-            fillResults
-        );
-    
-        // Settle order
-        settleOrder(
-            order,
-            takerAddress,
-            fillResults
-        );
-
-        return fillResults;
-    }
-
-    /// @dev After calling, the order can not be filled anymore.
-    ///      Throws if order is invalid or sender does not have permission to cancel.
-    /// @param order Order to cancel. Order must be OrderStatus.FILLABLE.
-    function cancelOrderInternal(Order memory order)
-        internal
-    {
-        // Fetch current order status
-        OrderInfo memory orderInfo = getOrderInfo(order);
-
-        // Validate context
-        assertValidCancel(order, orderInfo);
-
-        // Perform cancel
-        updateCancelledState(order, orderInfo.orderHash);
-    }
-
-    /// @dev Updates state with results of a fill order.
-    /// @param order that was filled.
-    /// @param takerAddress Address of taker who filled the order.
-    /// @param orderTakerAssetFilledAmount Amount of order already filled.
-    function updateFilledState(
-        Order memory order,
-        address takerAddress,
-        bytes32 orderHash,
-        uint256 orderTakerAssetFilledAmount,
-        FillResults memory fillResults
-    )
-        internal
-    {
-        // Update state
-        filled[orderHash] = safeAdd(orderTakerAssetFilledAmount, fillResults.takerAssetFilledAmount);
-
-        // Log order
-        emit Fill(
-            order.makerAddress,
-            order.feeRecipientAddress,
-            takerAddress,
-            msg.sender,
-            fillResults.makerAssetFilledAmount,
-            fillResults.takerAssetFilledAmount,
-            fillResults.makerFeePaid,
-            fillResults.takerFeePaid,
-            orderHash,
-            order.makerAssetData,
-            order.takerAssetData
-        );
-    }
-
-    /// @dev Updates state with results of cancelling an order.
-    ///      State is only updated if the order is currently fillable.
-    ///      Otherwise, updating state would have no effect.
-    /// @param order that was cancelled.
-    /// @param orderHash Hash of order that was cancelled.
-    function updateCancelledState(
-        Order memory order,
-        bytes32 orderHash
-    )
-        internal
-    {
-        // Perform cancel
-        cancelled[orderHash] = true;
-
-        // Log cancel
-        emit Cancel(
-            order.makerAddress,
-            order.feeRecipientAddress,
-            msg.sender,
-            orderHash,
-            order.makerAssetData,
-            order.takerAssetData
-        );
-    }
-    
-    /// @dev Validates context for fillOrder. Succeeds or throws.
-    /// @param order to be filled.
-    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
-    /// @param takerAddress Address of order taker.
-    /// @param signature Proof that the orders was created by its maker.
-    function assertFillableOrder(
-        Order memory order,
-        OrderInfo memory orderInfo,
-        address takerAddress,
-        bytes memory signature
-    )
-        internal
-        view
-    {
-        // An order can only be filled if its status is FILLABLE.
-        require(
-            orderInfo.orderStatus == uint8(OrderStatus.FILLABLE),
-            "ORDER_UNFILLABLE"
-        );
-        
-        // Validate sender is allowed to fill this order
-        if (order.senderAddress != address(0)) {
-            require(
-                order.senderAddress == msg.sender,
-                "INVALID_SENDER"
-            );
-        }
-        
-        // Validate taker is allowed to fill this order
-        if (order.takerAddress != address(0)) {
-            require(
-                order.takerAddress == takerAddress,
-                "INVALID_TAKER"
-            );
-        }
-        
-        // Validate Maker signature (check only if first time seen)
-        if (orderInfo.orderTakerAssetFilledAmount == 0) {
-            require(
-                isValidSignature(
-                    orderInfo.orderHash,
-                    order.makerAddress,
-                    signature
-                ),
-                "INVALID_ORDER_SIGNATURE"
-            );
-        }
-    }
-    
-    /// @dev Validates context for fillOrder. Succeeds or throws.
-    /// @param order to be filled.
-    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
-    /// @param takerAssetFillAmount Desired amount of order to fill by taker.
-    /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @param makerAssetFilledAmount Amount of makerAsset that will be transfered.
-    function assertValidFill(
-        Order memory order,
-        OrderInfo memory orderInfo,
-        uint256 takerAssetFillAmount,  // TODO: use FillResults
-        uint256 takerAssetFilledAmount,
-        uint256 makerAssetFilledAmount
-    )
-        internal
-        view
-    {
-        // Revert if fill amount is invalid
-        // TODO: reconsider necessity for v2.1
-        require(
-            takerAssetFillAmount != 0,
-            "INVALID_TAKER_AMOUNT"
-        );
-        
-        // Make sure taker does not pay more than desired amount
-        // NOTE: This assertion should never fail, it is here
-        //       as an extra defence against potential bugs.
-        require(
-            takerAssetFilledAmount <= takerAssetFillAmount,
-            "TAKER_OVERPAY"
-        );
-        
-        // Make sure order is not overfilled
-        // NOTE: This assertion should never fail, it is here
-        //       as an extra defence against potential bugs.
-        require(
-            safeAdd(orderInfo.orderTakerAssetFilledAmount, takerAssetFilledAmount) <= order.takerAssetAmount,
-            "ORDER_OVERFILL"
-        );
-        
-        // Make sure order is filled at acceptable price.
-        // The order has an implied price from the makers perspective:
-        //    order price = order.makerAssetAmount / order.takerAssetAmount
-        // i.e. the number of makerAsset maker is paying per takerAsset. The
-        // maker is guaranteed to get this price or a better (lower) one. The
-        // actual price maker is getting in this fill is:
-        //    fill price = makerAssetFilledAmount / takerAssetFilledAmount
-        // We need `fill price <= order price` for the fill to be fair to maker.
-        // This amounts to:
-        //     makerAssetFilledAmount        order.makerAssetAmount
-        //    ------------------------  <=  -----------------------
-        //     takerAssetFilledAmount        order.takerAssetAmount
-        // or, equivalently:
-        //     makerAssetFilledAmount * order.takerAssetAmount <=
-        //     order.makerAssetAmount * takerAssetFilledAmount
-        // NOTE: This assertion should never fail, it is here
-        //       as an extra defence against potential bugs.
-        require(
-            safeMul(makerAssetFilledAmount, order.takerAssetAmount)
-            <= 
-            safeMul(order.makerAssetAmount, takerAssetFilledAmount),
-            "INVALID_FILL_PRICE"
-        );
-    }
-
-    /// @dev Validates context for cancelOrder. Succeeds or throws.
-    /// @param order to be cancelled.
-    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
-    function assertValidCancel(
-        Order memory order,
-        OrderInfo memory orderInfo
-    )
-        internal
-        view
-    {
-        // Ensure order is valid
-        // An order can only be cancelled if its status is FILLABLE.
-        require(
-            orderInfo.orderStatus == uint8(OrderStatus.FILLABLE),
-            "ORDER_UNFILLABLE"
-        );
-
-        // Validate sender is allowed to cancel this order
-        if (order.senderAddress != address(0)) {
-            require(
-                order.senderAddress == msg.sender,
-                "INVALID_SENDER"
-            );
-        }
-
-        // Validate transaction signed by maker
-        address makerAddress = getCurrentContextAddress();
-        require(
-            order.makerAddress == makerAddress,
-            "INVALID_MAKER"
-        );
-    }
-
-    /// @dev Calculates amounts filled and fees paid by maker and taker.
-    /// @param order to be filled.
-    /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function calculateFillResults(
-        Order memory order,
-        uint256 takerAssetFilledAmount
-    )
-        internal
-        pure
-        returns (FillResults memory fillResults)
-    {
-        // Compute proportional transfer amounts
-        fillResults.takerAssetFilledAmount = takerAssetFilledAmount;
-        fillResults.makerAssetFilledAmount = safeGetPartialAmountFloor(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
-            order.makerAssetAmount
-        );
-        fillResults.makerFeePaid = safeGetPartialAmountFloor(
-            fillResults.makerAssetFilledAmount,
-            order.makerAssetAmount,
-            order.makerFee
-        );
-        fillResults.takerFeePaid = safeGetPartialAmountFloor(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
-            order.takerFee
-        );
-
-        return fillResults;
-    }
-
-    /// @dev Settles an order by transferring assets between counterparties.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAddress Address selling takerAsset and buying makerAsset.
-    /// @param fillResults Amounts to be filled and fees paid by maker and taker.
-    function settleOrder(
-        LibOrder.Order memory order,
-        address takerAddress,
-        LibFillResults.FillResults memory fillResults
-    )
-        private
-    {
-        bytes memory zrxAssetData = ZRX_ASSET_DATA;
-        dispatchTransferFrom(
-            order.makerAssetData,
-            order.makerAddress,
-            takerAddress,
-            fillResults.makerAssetFilledAmount
-        );
-        dispatchTransferFrom(
-            order.takerAssetData,
-            takerAddress,
-            order.makerAddress,
-            fillResults.takerAssetFilledAmount
-        );
-        dispatchTransferFrom(
-            zrxAssetData,
-            order.makerAddress,
-            order.feeRecipientAddress,
-            fillResults.makerFeePaid
-        );
-        dispatchTransferFrom(
-            zrxAssetData,
-            takerAddress,
-            order.feeRecipientAddress,
-            fillResults.takerFeePaid
-        );
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinMatchOrders.sol b/contracts/core/contracts/protocol/Exchange/MixinMatchOrders.sol
deleted file mode 100644
index fc6d73482..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinMatchOrders.sol
+++ /dev/null
@@ -1,335 +0,0 @@
-/*
-  Copyright 2018 ZeroEx Intl.
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-    http://www.apache.org/licenses/LICENSE-2.0
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol";
-import "@0x/contracts-libs/contracts/libs/LibConstants.sol";
-import "@0x/contracts-libs/contracts/libs/LibMath.sol";
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "./mixins/MExchangeCore.sol";
-import "./mixins/MMatchOrders.sol";
-import "./mixins/MTransactions.sol";
-import "./mixins/MAssetProxyDispatcher.sol";
-
-
-contract MixinMatchOrders is
-    ReentrancyGuard,
-    LibConstants,
-    LibMath,
-    MAssetProxyDispatcher,
-    MExchangeCore,
-    MMatchOrders,
-    MTransactions
-{
-    /// @dev Match two complementary orders that have a profitable spread.
-    ///      Each order is filled at their respective price point. However, the calculations are
-    ///      carried out as though the orders are both being filled at the right order's price point.
-    ///      The profit made by the left order goes to the taker (who matched the two orders).
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    /// @param leftSignature Proof that order was created by the left maker.
-    /// @param rightSignature Proof that order was created by the right maker.
-    /// @return matchedFillResults Amounts filled and fees paid by maker and taker of matched orders.
-    function matchOrders(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder,
-        bytes memory leftSignature,
-        bytes memory rightSignature
-    )
-        public
-        nonReentrant
-        returns (LibFillResults.MatchedFillResults memory matchedFillResults)
-    {
-        // We assume that rightOrder.takerAssetData == leftOrder.makerAssetData and rightOrder.makerAssetData == leftOrder.takerAssetData.
-        // If this assumption isn't true, the match will fail at signature validation.
-        rightOrder.makerAssetData = leftOrder.takerAssetData;
-        rightOrder.takerAssetData = leftOrder.makerAssetData;
-
-        // Get left & right order info
-        LibOrder.OrderInfo memory leftOrderInfo = getOrderInfo(leftOrder);
-        LibOrder.OrderInfo memory rightOrderInfo = getOrderInfo(rightOrder);
-
-        // Fetch taker address
-        address takerAddress = getCurrentContextAddress();
-        
-        // Either our context is valid or we revert
-        assertFillableOrder(
-            leftOrder,
-            leftOrderInfo,
-            takerAddress,
-            leftSignature
-        );
-        assertFillableOrder(
-            rightOrder,
-            rightOrderInfo,
-            takerAddress,
-            rightSignature
-        );
-        assertValidMatch(leftOrder, rightOrder);
-
-        // Compute proportional fill amounts
-        matchedFillResults = calculateMatchedFillResults(
-            leftOrder,
-            rightOrder,
-            leftOrderInfo.orderTakerAssetFilledAmount,
-            rightOrderInfo.orderTakerAssetFilledAmount
-        );
-
-        // Validate fill contexts
-        assertValidFill(
-            leftOrder,
-            leftOrderInfo,
-            matchedFillResults.left.takerAssetFilledAmount,
-            matchedFillResults.left.takerAssetFilledAmount,
-            matchedFillResults.left.makerAssetFilledAmount
-        );
-        assertValidFill(
-            rightOrder,
-            rightOrderInfo,
-            matchedFillResults.right.takerAssetFilledAmount,
-            matchedFillResults.right.takerAssetFilledAmount,
-            matchedFillResults.right.makerAssetFilledAmount
-        );
-        
-        // Update exchange state
-        updateFilledState(
-            leftOrder,
-            takerAddress,
-            leftOrderInfo.orderHash,
-            leftOrderInfo.orderTakerAssetFilledAmount,
-            matchedFillResults.left
-        );
-        updateFilledState(
-            rightOrder,
-            takerAddress,
-            rightOrderInfo.orderHash,
-            rightOrderInfo.orderTakerAssetFilledAmount,
-            matchedFillResults.right
-        );
-
-        // Settle matched orders. Succeeds or throws.
-        settleMatchedOrders(
-            leftOrder,
-            rightOrder,
-            takerAddress,
-            matchedFillResults
-        );
-
-        return matchedFillResults;
-    }
-
-    /// @dev Validates context for matchOrders. Succeeds or throws.
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    function assertValidMatch(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder
-    )
-        internal
-        pure
-    {
-        // Make sure there is a profitable spread.
-        // There is a profitable spread iff the cost per unit bought (OrderA.MakerAmount/OrderA.TakerAmount) for each order is greater
-        // than the profit per unit sold of the matched order (OrderB.TakerAmount/OrderB.MakerAmount).
-        // This is satisfied by the equations below:
-        // <leftOrder.makerAssetAmount> / <leftOrder.takerAssetAmount> >= <rightOrder.takerAssetAmount> / <rightOrder.makerAssetAmount>
-        // AND
-        // <rightOrder.makerAssetAmount> / <rightOrder.takerAssetAmount> >= <leftOrder.takerAssetAmount> / <leftOrder.makerAssetAmount>
-        // These equations can be combined to get the following:
-        require(
-            safeMul(leftOrder.makerAssetAmount, rightOrder.makerAssetAmount) >=
-            safeMul(leftOrder.takerAssetAmount, rightOrder.takerAssetAmount),
-            "NEGATIVE_SPREAD_REQUIRED"
-        );
-    }
-
-    /// @dev Calculates fill amounts for the matched orders.
-    ///      Each order is filled at their respective price point. However, the calculations are
-    ///      carried out as though the orders are both being filled at the right order's price point.
-    ///      The profit made by the leftOrder order goes to the taker (who matched the two orders).
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    /// @param leftOrderTakerAssetFilledAmount Amount of left order already filled.
-    /// @param rightOrderTakerAssetFilledAmount Amount of right order already filled.
-    /// @param matchedFillResults Amounts to fill and fees to pay by maker and taker of matched orders.
-    function calculateMatchedFillResults(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder,
-        uint256 leftOrderTakerAssetFilledAmount,
-        uint256 rightOrderTakerAssetFilledAmount
-    )
-        internal
-        pure
-        returns (LibFillResults.MatchedFillResults memory matchedFillResults)
-    {
-        // Derive maker asset amounts for left & right orders, given store taker assert amounts
-        uint256 leftTakerAssetAmountRemaining = safeSub(leftOrder.takerAssetAmount, leftOrderTakerAssetFilledAmount);
-        uint256 leftMakerAssetAmountRemaining = safeGetPartialAmountFloor(
-            leftOrder.makerAssetAmount,
-            leftOrder.takerAssetAmount,
-            leftTakerAssetAmountRemaining
-        );
-        uint256 rightTakerAssetAmountRemaining = safeSub(rightOrder.takerAssetAmount, rightOrderTakerAssetFilledAmount);
-        uint256 rightMakerAssetAmountRemaining = safeGetPartialAmountFloor(
-            rightOrder.makerAssetAmount,
-            rightOrder.takerAssetAmount,
-            rightTakerAssetAmountRemaining
-        );
-
-        // Calculate fill results for maker and taker assets: at least one order will be fully filled.
-        // The maximum amount the left maker can buy is `leftTakerAssetAmountRemaining`
-        // The maximum amount the right maker can sell is `rightMakerAssetAmountRemaining`
-        // We have two distinct cases for calculating the fill results:
-        // Case 1.
-        //   If the left maker can buy more than the right maker can sell, then only the right order is fully filled.
-        //   If the left maker can buy exactly what the right maker can sell, then both orders are fully filled.
-        // Case 2.
-        //   If the left maker cannot buy more than the right maker can sell, then only the left order is fully filled.
-        if (leftTakerAssetAmountRemaining >= rightMakerAssetAmountRemaining) {
-            // Case 1: Right order is fully filled
-            matchedFillResults.right.makerAssetFilledAmount = rightMakerAssetAmountRemaining;
-            matchedFillResults.right.takerAssetFilledAmount = rightTakerAssetAmountRemaining;
-            matchedFillResults.left.takerAssetFilledAmount = matchedFillResults.right.makerAssetFilledAmount;
-            // Round down to ensure the maker's exchange rate does not exceed the price specified by the order. 
-            // We favor the maker when the exchange rate must be rounded.
-            matchedFillResults.left.makerAssetFilledAmount = safeGetPartialAmountFloor(
-                leftOrder.makerAssetAmount,
-                leftOrder.takerAssetAmount,
-                matchedFillResults.left.takerAssetFilledAmount
-            );
-        } else {
-            // Case 2: Left order is fully filled
-            matchedFillResults.left.makerAssetFilledAmount = leftMakerAssetAmountRemaining;
-            matchedFillResults.left.takerAssetFilledAmount = leftTakerAssetAmountRemaining;
-            matchedFillResults.right.makerAssetFilledAmount = matchedFillResults.left.takerAssetFilledAmount;
-            // Round up to ensure the maker's exchange rate does not exceed the price specified by the order.
-            // We favor the maker when the exchange rate must be rounded.
-            matchedFillResults.right.takerAssetFilledAmount = safeGetPartialAmountCeil(
-                rightOrder.takerAssetAmount,
-                rightOrder.makerAssetAmount,
-                matchedFillResults.right.makerAssetFilledAmount
-            );
-        }
-
-        // Calculate amount given to taker
-        matchedFillResults.leftMakerAssetSpreadAmount = safeSub(
-            matchedFillResults.left.makerAssetFilledAmount,
-            matchedFillResults.right.takerAssetFilledAmount
-        );
-
-        // Compute fees for left order
-        matchedFillResults.left.makerFeePaid = safeGetPartialAmountFloor(
-            matchedFillResults.left.makerAssetFilledAmount,
-            leftOrder.makerAssetAmount,
-            leftOrder.makerFee
-        );
-        matchedFillResults.left.takerFeePaid = safeGetPartialAmountFloor(
-            matchedFillResults.left.takerAssetFilledAmount,
-            leftOrder.takerAssetAmount,
-            leftOrder.takerFee
-        );
-
-        // Compute fees for right order
-        matchedFillResults.right.makerFeePaid = safeGetPartialAmountFloor(
-            matchedFillResults.right.makerAssetFilledAmount,
-            rightOrder.makerAssetAmount,
-            rightOrder.makerFee
-        );
-        matchedFillResults.right.takerFeePaid = safeGetPartialAmountFloor(
-            matchedFillResults.right.takerAssetFilledAmount,
-            rightOrder.takerAssetAmount,
-            rightOrder.takerFee
-        );
-
-        // Return fill results
-        return matchedFillResults;
-    }
-
-    /// @dev Settles matched order by transferring appropriate funds between order makers, taker, and fee recipient.
-    /// @param leftOrder First matched order.
-    /// @param rightOrder Second matched order.
-    /// @param takerAddress Address that matched the orders. The taker receives the spread between orders as profit.
-    /// @param matchedFillResults Struct holding amounts to transfer between makers, taker, and fee recipients.
-    function settleMatchedOrders(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder,
-        address takerAddress,
-        LibFillResults.MatchedFillResults memory matchedFillResults
-    )
-        private
-    {
-        bytes memory zrxAssetData = ZRX_ASSET_DATA;
-        // Order makers and taker
-        dispatchTransferFrom(
-            leftOrder.makerAssetData,
-            leftOrder.makerAddress,
-            rightOrder.makerAddress,
-            matchedFillResults.right.takerAssetFilledAmount
-        );
-        dispatchTransferFrom(
-            rightOrder.makerAssetData,
-            rightOrder.makerAddress,
-            leftOrder.makerAddress,
-            matchedFillResults.left.takerAssetFilledAmount
-        );
-        dispatchTransferFrom(
-            leftOrder.makerAssetData,
-            leftOrder.makerAddress,
-            takerAddress,
-            matchedFillResults.leftMakerAssetSpreadAmount
-        );
-
-        // Maker fees
-        dispatchTransferFrom(
-            zrxAssetData,
-            leftOrder.makerAddress,
-            leftOrder.feeRecipientAddress,
-            matchedFillResults.left.makerFeePaid
-        );
-        dispatchTransferFrom(
-            zrxAssetData,
-            rightOrder.makerAddress,
-            rightOrder.feeRecipientAddress,
-            matchedFillResults.right.makerFeePaid
-        );
-
-        // Taker fees
-        if (leftOrder.feeRecipientAddress == rightOrder.feeRecipientAddress) {
-            dispatchTransferFrom(
-                zrxAssetData,
-                takerAddress,
-                leftOrder.feeRecipientAddress,
-                safeAdd(
-                    matchedFillResults.left.takerFeePaid,
-                    matchedFillResults.right.takerFeePaid
-                )
-            );
-        } else {
-            dispatchTransferFrom(
-                zrxAssetData,
-                takerAddress,
-                leftOrder.feeRecipientAddress,
-                matchedFillResults.left.takerFeePaid
-            );
-            dispatchTransferFrom(
-                zrxAssetData,
-                takerAddress,
-                rightOrder.feeRecipientAddress,
-                matchedFillResults.right.takerFeePaid
-            );
-        }
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinSignatureValidator.sol b/contracts/core/contracts/protocol/Exchange/MixinSignatureValidator.sol
deleted file mode 100644
index 80b4c0755..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinSignatureValidator.sol
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-utils/contracts/utils/LibBytes/LibBytes.sol";
-import "@0x/contracts-utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol";
-import "./mixins/MSignatureValidator.sol";
-import "./mixins/MTransactions.sol";
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IWallet.sol";
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IValidator.sol";
-
-
-contract MixinSignatureValidator is
-    ReentrancyGuard,
-    MSignatureValidator,
-    MTransactions
-{
-    using LibBytes for bytes;
-    
-    // Mapping of hash => signer => signed
-    mapping (bytes32 => mapping (address => bool)) public preSigned;
-
-    // Mapping of signer => validator => approved
-    mapping (address => mapping (address => bool)) public allowedValidators;
-
-    /// @dev Approves a hash on-chain using any valid signature type.
-    ///      After presigning a hash, the preSign signature type will become valid for that hash and signer.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof that the hash has been signed by signer.
-    function preSign(
-        bytes32 hash,
-        address signerAddress,
-        bytes signature
-    )
-        external
-    {
-        if (signerAddress != msg.sender) {
-            require(
-                isValidSignature(
-                    hash,
-                    signerAddress,
-                    signature
-                ),
-                "INVALID_SIGNATURE"
-            );
-        }
-        preSigned[hash][signerAddress] = true;
-    }
-
-    /// @dev Approves/unnapproves a Validator contract to verify signatures on signer's behalf.
-    /// @param validatorAddress Address of Validator contract.
-    /// @param approval Approval or disapproval of  Validator contract.
-    function setSignatureValidatorApproval(
-        address validatorAddress,
-        bool approval
-    )
-        external
-        nonReentrant
-    {
-        address signerAddress = getCurrentContextAddress();
-        allowedValidators[signerAddress][validatorAddress] = approval;
-        emit SignatureValidatorApproval(
-            signerAddress,
-            validatorAddress,
-            approval
-        );
-    }
-
-    /// @dev Verifies that a hash has been signed by the given signer.
-    /// @param hash Any 32 byte hash.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof that the hash has been signed by signer.
-    /// @return True if the address recovered from the provided signature matches the input signer address.
-    function isValidSignature(
-        bytes32 hash,
-        address signerAddress,
-        bytes memory signature
-    )
-        public
-        view
-        returns (bool isValid)
-    {
-        require(
-            signature.length > 0,
-            "LENGTH_GREATER_THAN_0_REQUIRED"
-        );
-
-        // Pop last byte off of signature byte array.
-        uint8 signatureTypeRaw = uint8(signature.popLastByte());
-
-        // Ensure signature is supported
-        require(
-            signatureTypeRaw < uint8(SignatureType.NSignatureTypes),
-            "SIGNATURE_UNSUPPORTED"
-        );
-
-        SignatureType signatureType = SignatureType(signatureTypeRaw);
-
-        // Variables are not scoped in Solidity.
-        uint8 v;
-        bytes32 r;
-        bytes32 s;
-        address recovered;
-
-        // Always illegal signature.
-        // This is always an implicit option since a signer can create a
-        // signature array with invalid type or length. We may as well make
-        // it an explicit option. This aids testing and analysis. It is
-        // also the initialization value for the enum type.
-        if (signatureType == SignatureType.Illegal) {
-            revert("SIGNATURE_ILLEGAL");
-
-        // Always invalid signature.
-        // Like Illegal, this is always implicitly available and therefore
-        // offered explicitly. It can be implicitly created by providing
-        // a correctly formatted but incorrect signature.
-        } else if (signatureType == SignatureType.Invalid) {
-            require(
-                signature.length == 0,
-                "LENGTH_0_REQUIRED"
-            );
-            isValid = false;
-            return isValid;
-
-        // Signature using EIP712
-        } else if (signatureType == SignatureType.EIP712) {
-            require(
-                signature.length == 65,
-                "LENGTH_65_REQUIRED"
-            );
-            v = uint8(signature[0]);
-            r = signature.readBytes32(1);
-            s = signature.readBytes32(33);
-            recovered = ecrecover(
-                hash,
-                v,
-                r,
-                s
-            );
-            isValid = signerAddress == recovered;
-            return isValid;
-
-        // Signed using web3.eth_sign
-        } else if (signatureType == SignatureType.EthSign) {
-            require(
-                signature.length == 65,
-                "LENGTH_65_REQUIRED"
-            );
-            v = uint8(signature[0]);
-            r = signature.readBytes32(1);
-            s = signature.readBytes32(33);
-            recovered = ecrecover(
-                keccak256(abi.encodePacked(
-                    "\x19Ethereum Signed Message:\n32",
-                    hash
-                )),
-                v,
-                r,
-                s
-            );
-            isValid = signerAddress == recovered;
-            return isValid;
-
-        // Signature verified by wallet contract.
-        // If used with an order, the maker of the order is the wallet contract.
-        } else if (signatureType == SignatureType.Wallet) {
-            isValid = isValidWalletSignature(
-                hash,
-                signerAddress,
-                signature
-            );
-            return isValid;
-
-        // Signature verified by validator contract.
-        // If used with an order, the maker of the order can still be an EOA.
-        // A signature using this type should be encoded as:
-        // | Offset   | Length | Contents                        |
-        // | 0x00     | x      | Signature to validate           |
-        // | 0x00 + x | 20     | Address of validator contract   |
-        // | 0x14 + x | 1      | Signature type is always "\x06" |
-        } else if (signatureType == SignatureType.Validator) {
-            // Pop last 20 bytes off of signature byte array.
-            address validatorAddress = signature.popLast20Bytes();
-            
-            // Ensure signer has approved validator.
-            if (!allowedValidators[signerAddress][validatorAddress]) {
-                return false;
-            }
-            isValid = isValidValidatorSignature(
-                validatorAddress,
-                hash,
-                signerAddress,
-                signature
-            );
-            return isValid;
-
-        // Signer signed hash previously using the preSign function.
-        } else if (signatureType == SignatureType.PreSigned) {
-            isValid = preSigned[hash][signerAddress];
-            return isValid;
-        }
-
-        // Anything else is illegal (We do not return false because
-        // the signature may actually be valid, just not in a format
-        // that we currently support. In this case returning false
-        // may lead the caller to incorrectly believe that the
-        // signature was invalid.)
-        revert("SIGNATURE_UNSUPPORTED");
-    }
-
-    /// @dev Verifies signature using logic defined by Wallet contract.
-    /// @param hash Any 32 byte hash.
-    /// @param walletAddress Address that should have signed the given hash
-    ///                      and defines its own signature verification method.
-    /// @param signature Proof that the hash has been signed by signer.
-    /// @return True if signature is valid for given wallet..
-    function isValidWalletSignature(
-        bytes32 hash,
-        address walletAddress,
-        bytes signature
-    )
-        internal
-        view
-        returns (bool isValid)
-    {
-        bytes memory callData = abi.encodeWithSelector(
-            IWallet(walletAddress).isValidSignature.selector,
-            hash,
-            signature
-        );
-        assembly {
-            let cdStart := add(callData, 32)
-            let success := staticcall(
-                gas,              // forward all gas
-                walletAddress,    // address of Wallet contract
-                cdStart,          // pointer to start of input
-                mload(callData),  // length of input
-                cdStart,          // write output over input
-                32                // output size is 32 bytes
-            )
-
-            switch success
-            case 0 {
-                // Revert with `Error("WALLET_ERROR")`
-                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                mstore(64, 0x0000000c57414c4c45545f4552524f5200000000000000000000000000000000)
-                mstore(96, 0)
-                revert(0, 100)
-            }
-            case 1 {
-                // Signature is valid if call did not revert and returned true
-                isValid := mload(cdStart)
-            }
-        }
-        return isValid;
-    }
-
-    /// @dev Verifies signature using logic defined by Validator contract.
-    /// @param validatorAddress Address of validator contract.
-    /// @param hash Any 32 byte hash.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof that the hash has been signed by signer.
-    /// @return True if the address recovered from the provided signature matches the input signer address.
-    function isValidValidatorSignature(
-        address validatorAddress,
-        bytes32 hash,
-        address signerAddress,
-        bytes signature
-    )
-        internal
-        view
-        returns (bool isValid)
-    {
-        bytes memory callData = abi.encodeWithSelector(
-            IValidator(signerAddress).isValidSignature.selector,
-            hash,
-            signerAddress,
-            signature
-        );
-        assembly {
-            let cdStart := add(callData, 32)
-            let success := staticcall(
-                gas,               // forward all gas
-                validatorAddress,  // address of Validator contract
-                cdStart,           // pointer to start of input
-                mload(callData),   // length of input
-                cdStart,           // write output over input
-                32                 // output size is 32 bytes
-            )
-
-            switch success
-            case 0 {
-                // Revert with `Error("VALIDATOR_ERROR")`
-                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
-                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
-                mstore(64, 0x0000000f56414c494441544f525f4552524f5200000000000000000000000000)
-                mstore(96, 0)
-                revert(0, 100)
-            }
-            case 1 {
-                // Signature is valid if call did not revert and returned true
-                isValid := mload(cdStart)
-            }
-        }
-        return isValid;
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinTransactions.sol b/contracts/core/contracts/protocol/Exchange/MixinTransactions.sol
deleted file mode 100644
index 87c614382..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinTransactions.sol
+++ /dev/null
@@ -1,152 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-pragma solidity 0.4.24;
-
-import "@0x/contracts-libs/contracts/libs/LibExchangeErrors.sol";
-import "./mixins/MSignatureValidator.sol";
-import "./mixins/MTransactions.sol";
-import "@0x/contracts-libs/contracts/libs/LibEIP712.sol";
-
-
-contract MixinTransactions is
-    LibEIP712,
-    MSignatureValidator,
-    MTransactions
-{
-    // Mapping of transaction hash => executed
-    // This prevents transactions from being executed more than once.
-    mapping (bytes32 => bool) public transactions;
-
-    // Address of current transaction signer
-    address public currentContextAddress;
-
-    /// @dev Executes an exchange method call in the context of signer.
-    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
-    /// @param signerAddress Address of transaction signer.
-    /// @param data AbiV2 encoded calldata.
-    /// @param signature Proof of signer transaction by signer.
-    function executeTransaction(
-        uint256 salt,
-        address signerAddress,
-        bytes data,
-        bytes signature
-    )
-        external
-    {
-        // Prevent reentrancy
-        require(
-            currentContextAddress == address(0),
-            "REENTRANCY_ILLEGAL"
-        );
-
-        bytes32 transactionHash = hashEIP712Message(hashZeroExTransaction(
-            salt,
-            signerAddress,
-            data
-        ));
-
-        // Validate transaction has not been executed
-        require(
-            !transactions[transactionHash],
-            "INVALID_TX_HASH"
-        );
-
-        // Transaction always valid if signer is sender of transaction
-        if (signerAddress != msg.sender) {
-            // Validate signature
-            require(
-                isValidSignature(
-                    transactionHash,
-                    signerAddress,
-                    signature
-                ),
-                "INVALID_TX_SIGNATURE"
-            );
-
-            // Set the current transaction signer
-            currentContextAddress = signerAddress;
-        }
-
-        // Execute transaction
-        transactions[transactionHash] = true;
-        require(
-            address(this).delegatecall(data),
-            "FAILED_EXECUTION"
-        );
-
-        // Reset current transaction signer if it was previously updated
-        if (signerAddress != msg.sender) {
-            currentContextAddress = address(0);
-        }
-    }
-
-    /// @dev Calculates EIP712 hash of the Transaction.
-    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
-    /// @param signerAddress Address of transaction signer.
-    /// @param data AbiV2 encoded calldata.
-    /// @return EIP712 hash of the Transaction.
-    function hashZeroExTransaction(
-        uint256 salt,
-        address signerAddress,
-        bytes memory data
-    )
-        internal
-        pure
-        returns (bytes32 result)
-    {
-        bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH;
-        bytes32 dataHash = keccak256(data);
-
-        // Assembly for more efficiently computing:
-        // keccak256(abi.encodePacked(
-        //     EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
-        //     salt,
-        //     bytes32(signerAddress),
-        //     keccak256(data)
-        // ));
-
-        assembly {
-            // Load free memory pointer
-            let memPtr := mload(64)
-
-            mstore(memPtr, schemaHash)                                                               // hash of schema
-            mstore(add(memPtr, 32), salt)                                                            // salt
-            mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff))  // signerAddress
-            mstore(add(memPtr, 96), dataHash)                                                        // hash of data
-
-            // Compute hash
-            result := keccak256(memPtr, 128)
-        }
-        return result;
-    }
-
-    /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
-    ///      If calling a fill function, this address will represent the taker.
-    ///      If calling a cancel function, this address will represent the maker.
-    /// @return Signer of 0x transaction if entry point is `executeTransaction`.
-    ///         `msg.sender` if entry point is any other function.
-    function getCurrentContextAddress()
-        internal
-        view
-        returns (address)
-    {
-        address currentContextAddress_ = currentContextAddress;
-        address contextAddress = currentContextAddress_ == address(0) ? msg.sender : currentContextAddress_;
-        return contextAddress;
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/MixinWrapperFunctions.sol b/contracts/core/contracts/protocol/Exchange/MixinWrapperFunctions.sol
deleted file mode 100644
index 2d43432ff..000000000
--- a/contracts/core/contracts/protocol/Exchange/MixinWrapperFunctions.sol
+++ /dev/null
@@ -1,426 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-utils/contracts/utils/ReentrancyGuard/ReentrancyGuard.sol";
-import "@0x/contracts-libs/contracts/libs/LibMath.sol";
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "@0x/contracts-libs/contracts/libs/LibAbiEncoder.sol";
-import "./mixins/MExchangeCore.sol";
-import "./mixins/MWrapperFunctions.sol";
-
-
-contract MixinWrapperFunctions is
-    ReentrancyGuard,
-    LibMath,
-    LibFillResults,
-    LibAbiEncoder,
-    MExchangeCore,
-    MWrapperFunctions
-{
-    /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    function fillOrKillOrder(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        public
-        nonReentrant
-        returns (FillResults memory fillResults)
-    {
-        fillResults = fillOrKillOrderInternal(
-            order,
-            takerAssetFillAmount,
-            signature
-        );
-        return fillResults;
-    }
-
-    /// @dev Fills the input order.
-    ///      Returns false if the transaction would otherwise revert.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    /// @return Amounts filled and fees paid by maker and taker.
-    function fillOrderNoThrow(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        public
-        returns (FillResults memory fillResults)
-    {
-        // ABI encode calldata for `fillOrder`
-        bytes memory fillOrderCalldata = abiEncodeFillOrder(
-            order,
-            takerAssetFillAmount,
-            signature
-        );
-
-        // Delegate to `fillOrder` and handle any exceptions gracefully
-        assembly {
-            let success := delegatecall(
-                gas,                                // forward all gas
-                address,                            // call address of this contract
-                add(fillOrderCalldata, 32),         // pointer to start of input (skip array length in first 32 bytes)
-                mload(fillOrderCalldata),           // length of input
-                fillOrderCalldata,                  // write output over input
-                128                                 // output size is 128 bytes
-            )
-            if success {
-                mstore(fillResults, mload(fillOrderCalldata))
-                mstore(add(fillResults, 32), mload(add(fillOrderCalldata, 32)))
-                mstore(add(fillResults, 64), mload(add(fillOrderCalldata, 64)))
-                mstore(add(fillResults, 96), mload(add(fillOrderCalldata, 96)))
-            }
-        }
-        // fillResults values will be 0 by default if call was unsuccessful
-        return fillResults;
-    }
-
-    /// @dev Synchronously executes multiple calls of fillOrder.
-    /// @param orders Array of order specifications.
-    /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
-    /// @param signatures Proofs that orders have been created by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
-    function batchFillOrders(
-        LibOrder.Order[] memory orders,
-        uint256[] memory takerAssetFillAmounts,
-        bytes[] memory signatures
-    )
-        public
-        nonReentrant
-        returns (FillResults memory totalFillResults)
-    {
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-            FillResults memory singleFillResults = fillOrderInternal(
-                orders[i],
-                takerAssetFillAmounts[i],
-                signatures[i]
-            );
-            addFillResults(totalFillResults, singleFillResults);
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously executes multiple calls of fillOrKill.
-    /// @param orders Array of order specifications.
-    /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
-    /// @param signatures Proofs that orders have been created by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
-    function batchFillOrKillOrders(
-        LibOrder.Order[] memory orders,
-        uint256[] memory takerAssetFillAmounts,
-        bytes[] memory signatures
-    )
-        public
-        nonReentrant
-        returns (FillResults memory totalFillResults)
-    {
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-            FillResults memory singleFillResults = fillOrKillOrderInternal(
-                orders[i],
-                takerAssetFillAmounts[i],
-                signatures[i]
-            );
-            addFillResults(totalFillResults, singleFillResults);
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Fills an order with specified parameters and ECDSA signature.
-    ///      Returns false if the transaction would otherwise revert.
-    /// @param orders Array of order specifications.
-    /// @param takerAssetFillAmounts Array of desired amounts of takerAsset to sell in orders.
-    /// @param signatures Proofs that orders have been created by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    ///         NOTE: makerAssetFilledAmount and takerAssetFilledAmount may include amounts filled of different assets.
-    function batchFillOrdersNoThrow(
-        LibOrder.Order[] memory orders,
-        uint256[] memory takerAssetFillAmounts,
-        bytes[] memory signatures
-    )
-        public
-        returns (FillResults memory totalFillResults)
-    {
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-            FillResults memory singleFillResults = fillOrderNoThrow(
-                orders[i],
-                takerAssetFillAmounts[i],
-                signatures[i]
-            );
-            addFillResults(totalFillResults, singleFillResults);
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.
-    /// @param orders Array of order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signatures Proofs that orders have been created by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    function marketSellOrders(
-        LibOrder.Order[] memory orders,
-        uint256 takerAssetFillAmount,
-        bytes[] memory signatures
-    )
-        public
-        nonReentrant
-        returns (FillResults memory totalFillResults)
-    {
-        bytes memory takerAssetData = orders[0].takerAssetData;
-    
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-
-            // We assume that asset being sold by taker is the same for each order.
-            // Rather than passing this in as calldata, we use the takerAssetData from the first order in all later orders.
-            orders[i].takerAssetData = takerAssetData;
-
-            // Calculate the remaining amount of takerAsset to sell
-            uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount);
-
-            // Attempt to sell the remaining amount of takerAsset
-            FillResults memory singleFillResults = fillOrderInternal(
-                orders[i],
-                remainingTakerAssetFillAmount,
-                signatures[i]
-            );
-
-            // Update amounts filled and fees paid by maker and taker
-            addFillResults(totalFillResults, singleFillResults);
-
-            // Stop execution if the entire amount of takerAsset has been sold
-            if (totalFillResults.takerAssetFilledAmount >= takerAssetFillAmount) {
-                break;
-            }
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously executes multiple calls of fillOrder until total amount of takerAsset is sold by taker.
-    ///      Returns false if the transaction would otherwise revert.
-    /// @param orders Array of order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signatures Proofs that orders have been signed by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    function marketSellOrdersNoThrow(
-        LibOrder.Order[] memory orders,
-        uint256 takerAssetFillAmount,
-        bytes[] memory signatures
-    )
-        public
-        returns (FillResults memory totalFillResults)
-    {
-        bytes memory takerAssetData = orders[0].takerAssetData;
-
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-
-            // We assume that asset being sold by taker is the same for each order.
-            // Rather than passing this in as calldata, we use the takerAssetData from the first order in all later orders.
-            orders[i].takerAssetData = takerAssetData;
-
-            // Calculate the remaining amount of takerAsset to sell
-            uint256 remainingTakerAssetFillAmount = safeSub(takerAssetFillAmount, totalFillResults.takerAssetFilledAmount);
-
-            // Attempt to sell the remaining amount of takerAsset
-            FillResults memory singleFillResults = fillOrderNoThrow(
-                orders[i],
-                remainingTakerAssetFillAmount,
-                signatures[i]
-            );
-
-            // Update amounts filled and fees paid by maker and taker
-            addFillResults(totalFillResults, singleFillResults);
-
-            // Stop execution if the entire amount of takerAsset has been sold
-            if (totalFillResults.takerAssetFilledAmount >= takerAssetFillAmount) {
-                break;
-            }
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously executes multiple calls of fillOrder until total amount of makerAsset is bought by taker.
-    /// @param orders Array of order specifications.
-    /// @param makerAssetFillAmount Desired amount of makerAsset to buy.
-    /// @param signatures Proofs that orders have been signed by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    function marketBuyOrders(
-        LibOrder.Order[] memory orders,
-        uint256 makerAssetFillAmount,
-        bytes[] memory signatures
-    )
-        public
-        nonReentrant
-        returns (FillResults memory totalFillResults)
-    {
-        bytes memory makerAssetData = orders[0].makerAssetData;
-
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-
-            // We assume that asset being bought by taker is the same for each order.
-            // Rather than passing this in as calldata, we copy the makerAssetData from the first order onto all later orders.
-            orders[i].makerAssetData = makerAssetData;
-
-            // Calculate the remaining amount of makerAsset to buy
-            uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount);
-
-            // Convert the remaining amount of makerAsset to buy into remaining amount
-            // of takerAsset to sell, assuming entire amount can be sold in the current order
-            uint256 remainingTakerAssetFillAmount = getPartialAmountFloor(
-                orders[i].takerAssetAmount,
-                orders[i].makerAssetAmount,
-                remainingMakerAssetFillAmount
-            );
-
-            // Attempt to sell the remaining amount of takerAsset
-            FillResults memory singleFillResults = fillOrderInternal(
-                orders[i],
-                remainingTakerAssetFillAmount,
-                signatures[i]
-            );
-
-            // Update amounts filled and fees paid by maker and taker
-            addFillResults(totalFillResults, singleFillResults);
-
-            // Stop execution if the entire amount of makerAsset has been bought
-            if (totalFillResults.makerAssetFilledAmount >= makerAssetFillAmount) {
-                break;
-            }
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously executes multiple fill orders in a single transaction until total amount is bought by taker.
-    ///      Returns false if the transaction would otherwise revert.
-    /// @param orders Array of order specifications.
-    /// @param makerAssetFillAmount Desired amount of makerAsset to buy.
-    /// @param signatures Proofs that orders have been signed by makers.
-    /// @return Amounts filled and fees paid by makers and taker.
-    function marketBuyOrdersNoThrow(
-        LibOrder.Order[] memory orders,
-        uint256 makerAssetFillAmount,
-        bytes[] memory signatures
-    )
-        public
-        returns (FillResults memory totalFillResults)
-    {
-        bytes memory makerAssetData = orders[0].makerAssetData;
-
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-
-            // We assume that asset being bought by taker is the same for each order.
-            // Rather than passing this in as calldata, we copy the makerAssetData from the first order onto all later orders.
-            orders[i].makerAssetData = makerAssetData;
-
-            // Calculate the remaining amount of makerAsset to buy
-            uint256 remainingMakerAssetFillAmount = safeSub(makerAssetFillAmount, totalFillResults.makerAssetFilledAmount);
-
-            // Convert the remaining amount of makerAsset to buy into remaining amount
-            // of takerAsset to sell, assuming entire amount can be sold in the current order
-            uint256 remainingTakerAssetFillAmount = getPartialAmountFloor(
-                orders[i].takerAssetAmount,
-                orders[i].makerAssetAmount,
-                remainingMakerAssetFillAmount
-            );
-
-            // Attempt to sell the remaining amount of takerAsset
-            FillResults memory singleFillResults = fillOrderNoThrow(
-                orders[i],
-                remainingTakerAssetFillAmount,
-                signatures[i]
-            );
-
-            // Update amounts filled and fees paid by maker and taker
-            addFillResults(totalFillResults, singleFillResults);
-
-            // Stop execution if the entire amount of makerAsset has been bought
-            if (totalFillResults.makerAssetFilledAmount >= makerAssetFillAmount) {
-                break;
-            }
-        }
-        return totalFillResults;
-    }
-
-    /// @dev Synchronously cancels multiple orders in a single transaction.
-    /// @param orders Array of order specifications.
-    function batchCancelOrders(LibOrder.Order[] memory orders)
-        public
-        nonReentrant
-    {
-        uint256 ordersLength = orders.length;
-        for (uint256 i = 0; i != ordersLength; i++) {
-            cancelOrderInternal(orders[i]);
-        }
-    }
-
-    /// @dev Fetches information for all passed in orders.
-    /// @param orders Array of order specifications.
-    /// @return Array of OrderInfo instances that correspond to each order.
-    function getOrdersInfo(LibOrder.Order[] memory orders)
-        public
-        view
-        returns (LibOrder.OrderInfo[] memory)
-    {
-        uint256 ordersLength = orders.length;
-        LibOrder.OrderInfo[] memory ordersInfo = new LibOrder.OrderInfo[](ordersLength);
-        for (uint256 i = 0; i != ordersLength; i++) {
-            ordersInfo[i] = getOrderInfo(orders[i]);
-        }
-        return ordersInfo;
-    }
-
-    /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    function fillOrKillOrderInternal(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        internal
-        returns (FillResults memory fillResults)
-    {
-        fillResults = fillOrderInternal(
-            order,
-            takerAssetFillAmount,
-            signature
-        );
-        require(
-            fillResults.takerAssetFilledAmount == takerAssetFillAmount,
-            "COMPLETE_FILL_FAILED"
-        );
-        return fillResults;
-    }
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol b/contracts/core/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
deleted file mode 100644
index fe3d03326..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IAssetProxyDispatcher.sol";
-
-
-contract MAssetProxyDispatcher is
-    IAssetProxyDispatcher
-{
-    // Logs registration of new asset proxy
-    event AssetProxyRegistered(
-        bytes4 id,              // Id of new registered AssetProxy.
-        address assetProxy      // Address of new registered AssetProxy.
-    );
-
-    /// @dev Forwards arguments to assetProxy and calls `transferFrom`. Either succeeds or throws.
-    /// @param assetData Byte array encoded for the asset.
-    /// @param from Address to transfer token from.
-    /// @param to Address to transfer token to.
-    /// @param amount Amount of token to transfer.
-    function dispatchTransferFrom(
-        bytes memory assetData,
-        address from,
-        address to,
-        uint256 amount
-    )
-        internal;
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MExchangeCore.sol b/contracts/core/contracts/protocol/Exchange/mixins/MExchangeCore.sol
deleted file mode 100644
index 215284900..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MExchangeCore.sol
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IExchangeCore.sol";
-
-
-contract MExchangeCore is
-    IExchangeCore
-{
-    // Fill event is emitted whenever an order is filled.
-    event Fill(
-        address indexed makerAddress,         // Address that created the order.      
-        address indexed feeRecipientAddress,  // Address that received fees.
-        address takerAddress,                 // Address that filled the order.
-        address senderAddress,                // Address that called the Exchange contract (msg.sender).
-        uint256 makerAssetFilledAmount,       // Amount of makerAsset sold by maker and bought by taker. 
-        uint256 takerAssetFilledAmount,       // Amount of takerAsset sold by taker and bought by maker.
-        uint256 makerFeePaid,                 // Amount of ZRX paid to feeRecipient by maker.
-        uint256 takerFeePaid,                 // Amount of ZRX paid to feeRecipient by taker.
-        bytes32 indexed orderHash,            // EIP712 hash of order (see LibOrder.getOrderHash).
-        bytes makerAssetData,                 // Encoded data specific to makerAsset. 
-        bytes takerAssetData                  // Encoded data specific to takerAsset.
-    );
-
-    // Cancel event is emitted whenever an individual order is cancelled.
-    event Cancel(
-        address indexed makerAddress,         // Address that created the order.      
-        address indexed feeRecipientAddress,  // Address that would have recieved fees if order was filled.   
-        address senderAddress,                // Address that called the Exchange contract (msg.sender).
-        bytes32 indexed orderHash,            // EIP712 hash of order (see LibOrder.getOrderHash).
-        bytes makerAssetData,                 // Encoded data specific to makerAsset. 
-        bytes takerAssetData                  // Encoded data specific to takerAsset.
-    );
-
-    // CancelUpTo event is emitted whenever `cancelOrdersUpTo` is executed succesfully.
-    event CancelUpTo(
-        address indexed makerAddress,         // Orders cancelled must have been created by this address.
-        address indexed senderAddress,        // Orders cancelled must have a `senderAddress` equal to this address.
-        uint256 orderEpoch                    // Orders with specified makerAddress and senderAddress with a salt less than this value are considered cancelled.
-    );
-
-    /// @dev Fills the input order.
-    /// @param order Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    /// @return Amounts filled and fees paid by maker and taker.
-    function fillOrderInternal(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        internal
-        returns (LibFillResults.FillResults memory fillResults);
-
-    /// @dev After calling, the order can not be filled anymore.
-    /// @param order Order struct containing order specifications.
-    function cancelOrderInternal(LibOrder.Order memory order)
-        internal;
-
-    /// @dev Updates state with results of a fill order.
-    /// @param order that was filled.
-    /// @param takerAddress Address of taker who filled the order.
-    /// @param orderTakerAssetFilledAmount Amount of order already filled.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function updateFilledState(
-        LibOrder.Order memory order,
-        address takerAddress,
-        bytes32 orderHash,
-        uint256 orderTakerAssetFilledAmount,
-        LibFillResults.FillResults memory fillResults
-    )
-        internal;
-
-    /// @dev Updates state with results of cancelling an order.
-    ///      State is only updated if the order is currently fillable.
-    ///      Otherwise, updating state would have no effect.
-    /// @param order that was cancelled.
-    /// @param orderHash Hash of order that was cancelled.
-    function updateCancelledState(
-        LibOrder.Order memory order,
-        bytes32 orderHash
-    )
-        internal;
-    
-    /// @dev Validates context for fillOrder. Succeeds or throws.
-    /// @param order to be filled.
-    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
-    /// @param takerAddress Address of order taker.
-    /// @param signature Proof that the orders was created by its maker.
-    function assertFillableOrder(
-        LibOrder.Order memory order,
-        LibOrder.OrderInfo memory orderInfo,
-        address takerAddress,
-        bytes memory signature
-    )
-        internal
-        view;
-    
-    /// @dev Validates context for fillOrder. Succeeds or throws.
-    /// @param order to be filled.
-    /// @param orderInfo Status, orderHash, and amount already filled of order.
-    /// @param takerAssetFillAmount Desired amount of order to fill by taker.
-    /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @param makerAssetFilledAmount Amount of makerAsset that will be transfered.
-    function assertValidFill(
-        LibOrder.Order memory order,
-        LibOrder.OrderInfo memory orderInfo,
-        uint256 takerAssetFillAmount,
-        uint256 takerAssetFilledAmount,
-        uint256 makerAssetFilledAmount
-    )
-        internal
-        view;
-
-    /// @dev Validates context for cancelOrder. Succeeds or throws.
-    /// @param order to be cancelled.
-    /// @param orderInfo OrderStatus, orderHash, and amount already filled of order.
-    function assertValidCancel(
-        LibOrder.Order memory order,
-        LibOrder.OrderInfo memory orderInfo
-    )
-        internal
-        view;
-
-    /// @dev Calculates amounts filled and fees paid by maker and taker.
-    /// @param order to be filled.
-    /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function calculateFillResults(
-        LibOrder.Order memory order,
-        uint256 takerAssetFilledAmount
-    )
-        internal
-        pure
-        returns (LibFillResults.FillResults memory fillResults);
-
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MMatchOrders.sol b/contracts/core/contracts/protocol/Exchange/mixins/MMatchOrders.sol
deleted file mode 100644
index 1eb4be329..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MMatchOrders.sol
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IMatchOrders.sol";
-
-
-contract MMatchOrders is
-    IMatchOrders
-{
-    /// @dev Validates context for matchOrders. Succeeds or throws.
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    function assertValidMatch(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder
-    )
-        internal
-        pure;
-
-    /// @dev Calculates fill amounts for the matched orders.
-    ///      Each order is filled at their respective price point. However, the calculations are
-    ///      carried out as though the orders are both being filled at the right order's price point.
-    ///      The profit made by the leftOrder order goes to the taker (who matched the two orders).
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    /// @param leftOrderTakerAssetFilledAmount Amount of left order already filled.
-    /// @param rightOrderTakerAssetFilledAmount Amount of right order already filled.
-    /// @param matchedFillResults Amounts to fill and fees to pay by maker and taker of matched orders.
-    function calculateMatchedFillResults(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder,
-        uint256 leftOrderTakerAssetFilledAmount,
-        uint256 rightOrderTakerAssetFilledAmount
-    )
-        internal
-        pure
-        returns (LibFillResults.MatchedFillResults memory matchedFillResults);
-
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MSignatureValidator.sol b/contracts/core/contracts/protocol/Exchange/mixins/MSignatureValidator.sol
deleted file mode 100644
index a933976d1..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MSignatureValidator.sol
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/ISignatureValidator.sol";
-
-
-contract MSignatureValidator is
-    ISignatureValidator
-{
-    event SignatureValidatorApproval(
-        address indexed signerAddress,     // Address that approves or disapproves a contract to verify signatures.
-        address indexed validatorAddress,  // Address of signature validator contract.
-        bool approved                      // Approval or disapproval of validator contract.
-    );
-
-    // Allowed signature types.
-    enum SignatureType {
-        Illegal,         // 0x00, default value
-        Invalid,         // 0x01
-        EIP712,          // 0x02
-        EthSign,         // 0x03
-        Wallet,          // 0x04
-        Validator,       // 0x05
-        PreSigned,       // 0x06
-        NSignatureTypes  // 0x07, number of signature types. Always leave at end.
-    }
-
-    /// @dev Verifies signature using logic defined by Wallet contract.
-    /// @param hash Any 32 byte hash.
-    /// @param walletAddress Address that should have signed the given hash
-    ///                      and defines its own signature verification method.
-    /// @param signature Proof that the hash has been signed by signer.
-    /// @return True if the address recovered from the provided signature matches the input signer address.
-    function isValidWalletSignature(
-        bytes32 hash,
-        address walletAddress,
-        bytes signature
-    )
-        internal
-        view
-        returns (bool isValid);
-
-    /// @dev Verifies signature using logic defined by Validator contract.
-    /// @param validatorAddress Address of validator contract.
-    /// @param hash Any 32 byte hash.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof that the hash has been signed by signer.
-    /// @return True if the address recovered from the provided signature matches the input signer address.
-    function isValidValidatorSignature(
-        address validatorAddress,
-        bytes32 hash,
-        address signerAddress,
-        bytes signature
-    )
-        internal
-        view
-        returns (bool isValid);
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MTransactions.sol b/contracts/core/contracts/protocol/Exchange/mixins/MTransactions.sol
deleted file mode 100644
index a6b0fdc85..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MTransactions.sol
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-pragma solidity 0.4.24;
-
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/ITransactions.sol";
-
-
-contract MTransactions is
-    ITransactions
-{
-    // Hash for the EIP712 ZeroEx Transaction Schema
-    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
-        "ZeroExTransaction(",
-        "uint256 salt,",
-        "address signerAddress,",
-        "bytes data",
-        ")"
-    ));
-
-    /// @dev Calculates EIP712 hash of the Transaction.
-    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
-    /// @param signerAddress Address of transaction signer.
-    /// @param data AbiV2 encoded calldata.
-    /// @return EIP712 hash of the Transaction.
-    function hashZeroExTransaction(
-        uint256 salt,
-        address signerAddress,
-        bytes memory data
-    )
-        internal
-        pure
-        returns (bytes32 result);
-
-    /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
-    ///      If calling a fill function, this address will represent the taker.
-    ///      If calling a cancel function, this address will represent the maker.
-    /// @return Signer of 0x transaction if entry point is `executeTransaction`.
-    ///         `msg.sender` if entry point is any other function.
-    function getCurrentContextAddress()
-        internal
-        view
-        returns (address);
-}
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol b/contracts/core/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol
deleted file mode 100644
index 101e7cb82..000000000
--- a/contracts/core/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "@0x/contracts-libs/contracts/libs/LibOrder.sol";
-import "@0x/contracts-libs/contracts/libs/LibFillResults.sol";
-import "@0x/contracts-interfaces/contracts/protocol/Exchange/IWrapperFunctions.sol";
-
-
-contract MWrapperFunctions is 
-    IWrapperFunctions
-{
-    /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
-    /// @param order LibOrder.Order struct containing order specifications.
-    /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
-    /// @param signature Proof that order has been created by maker.
-    function fillOrKillOrderInternal(
-        LibOrder.Order memory order,
-        uint256 takerAssetFillAmount,
-        bytes memory signature
-    )
-        internal
-        returns (LibFillResults.FillResults memory fillResults);
-}
diff --git a/contracts/core/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol b/contracts/core/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
deleted file mode 100644
index ad71fc9a1..000000000
--- a/contracts/core/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "../../protocol/Exchange/MixinAssetProxyDispatcher.sol";
-
-
-contract TestAssetProxyDispatcher is 
-    MixinAssetProxyDispatcher
-{
-    function publicDispatchTransferFrom(
-        bytes memory assetData,
-        address from,
-        address to,
-        uint256 amount
-    )
-        public
-    {
-        dispatchTransferFrom(assetData, from, to, amount);
-    }
-}
diff --git a/contracts/core/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol b/contracts/core/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
deleted file mode 100644
index 52c66cb56..000000000
--- a/contracts/core/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "../../protocol/AssetProxyOwner/AssetProxyOwner.sol";
-
-
-// solhint-disable no-empty-blocks
-contract TestAssetProxyOwner is
-    AssetProxyOwner
-{
-    constructor (
-        address[] memory _owners,
-        address[] memory _assetProxyContracts,
-        uint256 _required,
-        uint256 _secondsTimeLocked
-    )
-        public
-        AssetProxyOwner(_owners, _assetProxyContracts, _required, _secondsTimeLocked)
-    {}
-    
-    function testValidRemoveAuthorizedAddressAtIndexTx(uint256 id)
-        public
-        view
-        validRemoveAuthorizedAddressAtIndexTx(id)
-        returns (bool)
-    {
-        // Do nothing. We expect reverts through the modifier
-        return true;
-    }
-    
-    /// @dev Compares first 4 bytes of byte array to `removeAuthorizedAddressAtIndex` function selector.
-    /// @param data Transaction data.
-    /// @return Successful if data is a call to `removeAuthorizedAddressAtIndex`.
-    function isFunctionRemoveAuthorizedAddressAtIndex(bytes memory data)
-        public
-        pure
-        returns (bool)
-    {
-        return data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR;
-    }
-}
diff --git a/contracts/core/contracts/test/TestExchangeInternals/TestExchangeInternals.sol b/contracts/core/contracts/test/TestExchangeInternals/TestExchangeInternals.sol
deleted file mode 100644
index 27187f8f8..000000000
--- a/contracts/core/contracts/test/TestExchangeInternals/TestExchangeInternals.sol
+++ /dev/null
@@ -1,191 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-pragma experimental ABIEncoderV2;
-
-import "../../protocol/Exchange/Exchange.sol";
-
-
-// solhint-disable no-empty-blocks
-contract TestExchangeInternals is
-    Exchange
-{
-    constructor ()
-        public
-        Exchange("")
-    {}
-
-    /// @dev Adds properties of both FillResults instances.
-    ///      Modifies the first FillResults instance specified.
-    ///      Note that this function has been modified from the original
-    //       internal version to return the FillResults.
-    /// @param totalFillResults Fill results instance that will be added onto.
-    /// @param singleFillResults Fill results instance that will be added to totalFillResults.
-    /// @return newTotalFillResults The result of adding singleFillResults to totalFilResults.
-    function publicAddFillResults(FillResults memory totalFillResults, FillResults memory singleFillResults)
-        public
-        pure
-        returns (FillResults memory)
-    {
-        addFillResults(totalFillResults, singleFillResults);
-        return totalFillResults;
-    }
-
-    /// @dev Calculates amounts filled and fees paid by maker and taker.
-    /// @param order to be filled.
-    /// @param takerAssetFilledAmount Amount of takerAsset that will be filled.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function publicCalculateFillResults(
-        Order memory order,
-        uint256 takerAssetFilledAmount
-    )
-        public
-        pure
-        returns (FillResults memory fillResults)
-    {
-        return calculateFillResults(order, takerAssetFilledAmount);
-    }
-
-    /// @dev Calculates partial value given a numerator and denominator.
-    ///      Reverts if rounding error is >= 0.1%
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to calculate partial of.
-    /// @return Partial value of target.
-    function publicSafeGetPartialAmountFloor(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (uint256 partialAmount)
-    {
-        return safeGetPartialAmountFloor(numerator, denominator, target);
-    }
-
-    /// @dev Calculates partial value given a numerator and denominator.
-    ///      Reverts if rounding error is >= 0.1%
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to calculate partial of.
-    /// @return Partial value of target.
-    function publicSafeGetPartialAmountCeil(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (uint256 partialAmount)
-    {
-        return safeGetPartialAmountCeil(numerator, denominator, target);
-    }
-
-    /// @dev Calculates partial value given a numerator and denominator.
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to calculate partial of.
-    /// @return Partial value of target.
-    function publicGetPartialAmountFloor(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (uint256 partialAmount)
-    {
-        return getPartialAmountFloor(numerator, denominator, target);
-    }
-
-    /// @dev Calculates partial value given a numerator and denominator.
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to calculate partial of.
-    /// @return Partial value of target.
-    function publicGetPartialAmountCeil(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (uint256 partialAmount)
-    {
-        return getPartialAmountCeil(numerator, denominator, target);
-    }
-
-    /// @dev Checks if rounding error >= 0.1%.
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to multiply with numerator/denominator.
-    /// @return Rounding error is present.
-    function publicIsRoundingErrorFloor(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (bool isError)
-    {
-        return isRoundingErrorFloor(numerator, denominator, target);
-    }
-
-    /// @dev Checks if rounding error >= 0.1%.
-    /// @param numerator Numerator.
-    /// @param denominator Denominator.
-    /// @param target Value to multiply with numerator/denominator.
-    /// @return Rounding error is present.
-    function publicIsRoundingErrorCeil(
-        uint256 numerator,
-        uint256 denominator,
-        uint256 target
-    )
-        public
-        pure
-        returns (bool isError)
-    {
-        return isRoundingErrorCeil(numerator, denominator, target);
-    }
- 
-    /// @dev Updates state with results of a fill order.
-    /// @param order that was filled.
-    /// @param takerAddress Address of taker who filled the order.
-    /// @param orderTakerAssetFilledAmount Amount of order already filled.
-    /// @return fillResults Amounts filled and fees paid by maker and taker.
-    function publicUpdateFilledState(
-        Order memory order,
-        address takerAddress,
-        bytes32 orderHash,
-        uint256 orderTakerAssetFilledAmount,
-        FillResults memory fillResults
-    )
-        public
-    {
-        updateFilledState(
-            order,
-            takerAddress,
-            orderHash,
-            orderTakerAssetFilledAmount,
-            fillResults
-        );
-    }
-}
diff --git a/contracts/core/contracts/test/TestSignatureValidator/TestSignatureValidator.sol b/contracts/core/contracts/test/TestSignatureValidator/TestSignatureValidator.sol
deleted file mode 100644
index ea3e2de59..000000000
--- a/contracts/core/contracts/test/TestSignatureValidator/TestSignatureValidator.sol
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "../../protocol/Exchange/MixinSignatureValidator.sol";
-import "../../protocol/Exchange/MixinTransactions.sol";
-
-
-contract TestSignatureValidator is
-    MixinSignatureValidator,
-    MixinTransactions
-{
-    function publicIsValidSignature(
-        bytes32 hash,
-        address signer,
-        bytes memory signature
-    )
-        public
-        view
-        returns (bool isValid)
-    {
-        isValid = isValidSignature(
-            hash,
-            signer,
-            signature
-        );
-        return isValid;
-    }
-}
diff --git a/contracts/core/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol b/contracts/core/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol
deleted file mode 100644
index d08da7303..000000000
--- a/contracts/core/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
-
-  Copyright 2018 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity 0.4.24;
-
-import "@0x/contracts-tokens/contracts/tokens/ERC20Token/IERC20Token.sol";
-
-
-// solhint-disable no-unused-vars
-contract TestStaticCallReceiver {
-
-    uint256 internal state = 1;
-
-    /// @dev Updates state and returns true. Intended to be used with `Validator` signature type.
-    /// @param hash Message hash that is signed.
-    /// @param signerAddress Address that should have signed the given hash.
-    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
-    function isValidSignature(
-        bytes32 hash,
-        address signerAddress,
-        bytes signature
-    )
-        external
-        returns (bool isValid)
-    {
-        updateState();
-        return true;
-    }
-
-    /// @dev Updates state and returns true. Intended to be used with `Wallet` signature type.
-    /// @param hash Message hash that is signed.
-    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
-    function isValidSignature(
-        bytes32 hash,
-        bytes signature
-    )
-        external
-        returns (bool isValid)
-    {
-        updateState();
-        return true;
-    }
-
-    /// @dev Approves an ERC20 token to spend tokens from this address.
-    /// @param token Address of ERC20 token.
-    /// @param spender Address that will spend tokens.
-    /// @param value Amount of tokens spender is approved to spend.
-    function approveERC20(
-        address token,
-        address spender,
-        uint256 value
-    )
-        external
-    {
-        IERC20Token(token).approve(spender, value);
-    }
-
-    /// @dev Increments state variable.
-    function updateState()
-        internal
-    {
-        state++;
-    }
-}
diff --git a/contracts/core/package.json b/contracts/core/package.json
deleted file mode 100644
index b7077f4b4..000000000
--- a/contracts/core/package.json
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-    "private": true,
-    "name": "@0x/contracts-core",
-    "version": "2.1.56",
-    "engines": {
-        "node": ">=6.12"
-    },
-    "description": "Smart contract components of 0x protocol",
-    "main": "lib/src/index.js",
-    "directories": {
-        "test": "test"
-    },
-    "scripts": {
-        "build": "yarn pre_build && tsc -b",
-        "build:ci": "yarn build",
-        "pre_build": "run-s compile generate_contract_wrappers",
-        "test": "yarn run_mocha",
-        "rebuild_and_test": "run-s build test",
-        "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
-        "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
-        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
-        "run_mocha":
-            "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
-        "compile": "sol-compiler --contracts-dir contracts",
-        "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
-        "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
-        "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
-        "coverage:report:text": "istanbul report text",
-        "coverage:report:html": "istanbul report html && open coverage/index.html",
-        "profiler:report:html": "istanbul report html && open coverage/index.html",
-        "coverage:report:lcov": "istanbul report lcov",
-        "test:circleci": "yarn test",
-        "lint-contracts": "solhint contracts/**/**/**/**/*.sol"
-    },
-    "config": {
-        "abis": "generated-artifacts/@(AssetProxyOwner|ERC20Proxy|ERC721Proxy|Exchange|MixinAuthorizable|MultiAssetProxy|TestSignatureValidator|TestAssetProxyOwner|TestAssetProxyDispatcher|TestExchangeInternals|TestStaticCallReceiver).json"
-    },
-    "repository": {
-        "type": "git",
-        "url": "https://github.com/0xProject/0x-monorepo.git"
-    },
-    "license": "Apache-2.0",
-    "bugs": {
-        "url": "https://github.com/0xProject/0x-monorepo/issues"
-    },
-    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/core/README.md",
-    "devDependencies": {
-        "@0x/contracts-test-utils": "^1.0.0",
-        "@0x/abi-gen": "^1.0.17",
-        "@0x/dev-utils": "^1.0.19",
-        "@0x/sol-compiler": "^1.1.14",
-        "@0x/sol-cov": "^2.1.14",
-        "@0x/subproviders": "^2.1.6",
-        "@0x/tslint-config": "^1.0.10",
-        "@types/bn.js": "^4.11.0",
-        "@types/lodash": "4.14.104",
-        "@types/node": "*",
-        "@types/yargs": "^10.0.0",
-        "chai": "^4.0.1",
-        "chai-as-promised": "^7.1.0",
-        "chai-bignumber": "^2.0.1",
-        "dirty-chai": "^2.0.1",
-        "make-promises-safe": "^1.1.0",
-        "ethereumjs-abi": "0.6.5",
-        "mocha": "^4.1.0",
-        "npm-run-all": "^4.1.2",
-        "shx": "^0.2.2",
-        "solc": "^0.4.24",
-        "solhint": "^1.2.1",
-        "tslint": "5.11.0",
-        "typescript": "3.0.1",
-        "yargs": "^10.0.3"
-    },
-    "dependencies": {
-        "@0x/base-contract": "^3.0.8",
-        "@0x/order-utils": "^3.0.4",
-        "@0x/contracts-multisig": "^1.0.0",
-        "@0x/contracts-utils": "^1.0.0",
-        "@0x/contracts-tokens": "^1.0.0",
-        "@0x/contracts-examples": "^1.0.0",
-        "@0x/contracts-libs": "^1.0.0",
-        "@0x/contracts-interfaces": "^1.0.0",
-        "@0x/types": "^1.3.0",
-        "@0x/typescript-typings": "^3.0.4",
-        "@0x/utils": "^2.0.6",
-        "@0x/web3-wrapper": "^3.1.6",
-        "@types/js-combinatorics": "^0.5.29",
-        "bn.js": "^4.11.8",
-        "ethereum-types": "^1.1.2",
-        "ethereumjs-util": "^5.1.1",
-        "lodash": "^4.17.5"
-    },
-    "publishConfig": {
-        "access": "public"
-    }
-}
diff --git a/contracts/core/src/artifacts/index.ts b/contracts/core/src/artifacts/index.ts
deleted file mode 100644
index c5d12f10b..000000000
--- a/contracts/core/src/artifacts/index.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-import { ContractArtifact } from 'ethereum-types';
-
-import * as AssetProxyOwner from '../../generated-artifacts/AssetProxyOwner.json';
-import * as ERC20Proxy from '../../generated-artifacts/ERC20Proxy.json';
-import * as ERC721Proxy from '../../generated-artifacts/ERC721Proxy.json';
-import * as Exchange from '../../generated-artifacts/Exchange.json';
-import * as MixinAuthorizable from '../../generated-artifacts/MixinAuthorizable.json';
-import * as MultiAssetProxy from '../../generated-artifacts/MultiAssetProxy.json';
-import * as TestAssetProxyDispatcher from '../../generated-artifacts/TestAssetProxyDispatcher.json';
-import * as TestAssetProxyOwner from '../../generated-artifacts/TestAssetProxyOwner.json';
-import * as TestExchangeInternals from '../../generated-artifacts/TestExchangeInternals.json';
-import * as TestSignatureValidator from '../../generated-artifacts/TestSignatureValidator.json';
-import * as TestStaticCallReceiver from '../../generated-artifacts/TestStaticCallReceiver.json';
-
-export const artifacts = {
-    AssetProxyOwner: AssetProxyOwner as ContractArtifact,
-    ERC20Proxy: ERC20Proxy as ContractArtifact,
-    ERC721Proxy: ERC721Proxy as ContractArtifact,
-    Exchange: Exchange as ContractArtifact,
-    MixinAuthorizable: MixinAuthorizable as ContractArtifact,
-    MultiAssetProxy: MultiAssetProxy as ContractArtifact,
-    TestAssetProxyDispatcher: TestAssetProxyDispatcher as ContractArtifact,
-    TestAssetProxyOwner: TestAssetProxyOwner as ContractArtifact,
-    TestExchangeInternals: TestExchangeInternals as ContractArtifact,
-    TestSignatureValidator: TestSignatureValidator as ContractArtifact,
-    TestStaticCallReceiver: TestStaticCallReceiver as ContractArtifact,
-};
diff --git a/contracts/core/src/index.ts b/contracts/core/src/index.ts
deleted file mode 100644
index ba813e7ca..000000000
--- a/contracts/core/src/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export * from './artifacts';
-export * from './wrappers';
-export * from '../test/utils';
diff --git a/contracts/core/src/wrappers/index.ts b/contracts/core/src/wrappers/index.ts
deleted file mode 100644
index 01b121054..000000000
--- a/contracts/core/src/wrappers/index.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-export * from '../../generated-wrappers/asset_proxy_owner';
-export * from '../../generated-wrappers/erc20_proxy';
-export * from '../../generated-wrappers/erc721_proxy';
-export * from '../../generated-wrappers/exchange';
-export * from '../../generated-wrappers/mixin_authorizable';
-export * from '../../generated-wrappers/test_asset_proxy_dispatcher';
-export * from '../../generated-wrappers/test_asset_proxy_owner';
-export * from '../../generated-wrappers/test_exchange_internals';
-export * from '../../generated-wrappers/test_signature_validator';
-export * from '../../generated-wrappers/test_static_call_receiver';
diff --git a/contracts/core/test/asset_proxy/authorizable.ts b/contracts/core/test/asset_proxy/authorizable.ts
deleted file mode 100644
index 853d18be0..000000000
--- a/contracts/core/test/asset_proxy/authorizable.ts
+++ /dev/null
@@ -1,211 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    expectTransactionFailedAsync,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { MixinAuthorizableContract } from '../../generated-wrappers/mixin_authorizable';
-import { artifacts } from '../../src/artifacts';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-describe('Authorizable', () => {
-    let owner: string;
-    let notOwner: string;
-    let address: string;
-    let authorizable: MixinAuthorizableContract;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        [owner, address, notOwner] = _.slice(accounts, 0, 3);
-        authorizable = await MixinAuthorizableContract.deployFrom0xArtifactAsync(
-            artifacts.MixinAuthorizable,
-            provider,
-            txDefaults,
-        );
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('addAuthorizedAddress', () => {
-        it('should throw if not called by owner', async () => {
-            return expectTransactionFailedAsync(
-                authorizable.addAuthorizedAddress.sendTransactionAsync(notOwner, { from: notOwner }),
-                RevertReason.OnlyContractOwner,
-            );
-        });
-        it('should allow owner to add an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const isAuthorized = await authorizable.authorized.callAsync(address);
-            expect(isAuthorized).to.be.true();
-        });
-        it('should throw if owner attempts to authorize a duplicate address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            return expectTransactionFailedAsync(
-                authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                RevertReason.TargetAlreadyAuthorized,
-            );
-        });
-    });
-
-    describe('removeAuthorizedAddress', () => {
-        it('should throw if not called by owner', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: notOwner,
-                }),
-                RevertReason.OnlyContractOwner,
-            );
-        });
-
-        it('should allow owner to remove an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const isAuthorized = await authorizable.authorized.callAsync(address);
-            expect(isAuthorized).to.be.false();
-        });
-
-        it('should throw if owner attempts to remove an address that is not authorized', async () => {
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
-                RevertReason.TargetNotAuthorized,
-            );
-        });
-    });
-
-    describe('removeAuthorizedAddressAtIndex', () => {
-        it('should throw if not called by owner', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const index = new BigNumber(0);
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
-                    from: notOwner,
-                }),
-                RevertReason.OnlyContractOwner,
-            );
-        });
-        it('should throw if index is >= authorities.length', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const index = new BigNumber(1);
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
-                    from: owner,
-                }),
-                RevertReason.IndexOutOfBounds,
-            );
-        });
-        it('should throw if owner attempts to remove an address that is not authorized', async () => {
-            const index = new BigNumber(0);
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
-                    from: owner,
-                }),
-                RevertReason.TargetNotAuthorized,
-            );
-        });
-        it('should throw if address at index does not match target', async () => {
-            const address1 = address;
-            const address2 = notOwner;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address1, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address2, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const address1Index = new BigNumber(0);
-            return expectTransactionFailedAsync(
-                authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address2, address1Index, {
-                    from: owner,
-                }),
-                RevertReason.AuthorizedAddressMismatch,
-            );
-        });
-        it('should allow owner to remove an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const index = new BigNumber(0);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
-                    from: owner,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const isAuthorized = await authorizable.authorized.callAsync(address);
-            expect(isAuthorized).to.be.false();
-        });
-    });
-
-    describe('getAuthorizedAddresses', () => {
-        it('should return all authorized addresses', async () => {
-            const initial = await authorizable.getAuthorizedAddresses.callAsync();
-            expect(initial).to.have.length(0);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const afterAdd = await authorizable.getAuthorizedAddresses.callAsync();
-            expect(afterAdd).to.have.length(1);
-            expect(afterAdd).to.include(address);
-
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const afterRemove = await authorizable.getAuthorizedAddresses.callAsync();
-            expect(afterRemove).to.have.length(0);
-        });
-    });
-});
diff --git a/contracts/core/test/asset_proxy/proxies.ts b/contracts/core/test/asset_proxy/proxies.ts
deleted file mode 100644
index c4bd95905..000000000
--- a/contracts/core/test/asset_proxy/proxies.ts
+++ /dev/null
@@ -1,1253 +0,0 @@
-import { artifacts as interfacesArtifacts, IAssetDataContract, IAssetProxyContract } from '@0x/contracts-interfaces';
-import {
-    chaiSetup,
-    constants,
-    expectTransactionFailedAsync,
-    expectTransactionFailedWithoutReasonAsync,
-    LogDecoder,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import {
-    artifacts as tokensArtifacts,
-    DummyERC20TokenContract,
-    DummyERC721ReceiverContract,
-    DummyERC721TokenContract,
-    DummyMultipleReturnERC20TokenContract,
-    DummyNoReturnERC20TokenContract,
-} from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils } from '@0x/order-utils';
-import { RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { MultiAssetProxyContract } from '../../generated-wrappers/multi_asset_proxy';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-const assetProxyInterface = new IAssetProxyContract(
-    interfacesArtifacts.IAssetProxy.compilerOutput.abi,
-    constants.NULL_ADDRESS,
-    provider,
-);
-const assetDataInterface = new IAssetDataContract(
-    interfacesArtifacts.IAssetData.compilerOutput.abi,
-    constants.NULL_ADDRESS,
-    provider,
-);
-
-// tslint:disable:no-unnecessary-type-assertion
-describe('Asset Transfer Proxies', () => {
-    let owner: string;
-    let notAuthorized: string;
-    let authorized: string;
-    let fromAddress: string;
-    let toAddress: string;
-
-    let erc20TokenA: DummyERC20TokenContract;
-    let erc20TokenB: DummyERC20TokenContract;
-    let erc721TokenA: DummyERC721TokenContract;
-    let erc721TokenB: DummyERC721TokenContract;
-    let erc721Receiver: DummyERC721ReceiverContract;
-    let erc20Proxy: ERC20ProxyContract;
-    let erc721Proxy: ERC721ProxyContract;
-    let noReturnErc20Token: DummyNoReturnERC20TokenContract;
-    let multipleReturnErc20Token: DummyMultipleReturnERC20TokenContract;
-    let multiAssetProxy: MultiAssetProxyContract;
-
-    let erc20Wrapper: ERC20Wrapper;
-    let erc721Wrapper: ERC721Wrapper;
-    let erc721AFromTokenId: BigNumber;
-    let erc721BFromTokenId: BigNumber;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, notAuthorized, authorized, fromAddress, toAddress] = _.slice(accounts, 0, 5));
-
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-        erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
-
-        // Deploy AssetProxies
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        multiAssetProxy = await MultiAssetProxyContract.deployFrom0xArtifactAsync(
-            artifacts.MultiAssetProxy,
-            provider,
-            txDefaults,
-        );
-
-        // Configure ERC20Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Configure ERC721Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Configure MultiAssetProxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Deploy and configure ERC20 tokens
-        const numDummyErc20ToDeploy = 2;
-        [erc20TokenA, erc20TokenB] = await erc20Wrapper.deployDummyTokensAsync(
-            numDummyErc20ToDeploy,
-            constants.DUMMY_TOKEN_DECIMALS,
-        );
-        noReturnErc20Token = await DummyNoReturnERC20TokenContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.DummyNoReturnERC20Token,
-            provider,
-            txDefaults,
-            constants.DUMMY_TOKEN_NAME,
-            constants.DUMMY_TOKEN_SYMBOL,
-            constants.DUMMY_TOKEN_DECIMALS,
-            constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-        );
-        multipleReturnErc20Token = await DummyMultipleReturnERC20TokenContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.DummyMultipleReturnERC20Token,
-            provider,
-            txDefaults,
-            constants.DUMMY_TOKEN_NAME,
-            constants.DUMMY_TOKEN_SYMBOL,
-            constants.DUMMY_TOKEN_DECIMALS,
-            constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-        );
-
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await noReturnErc20Token.setBalance.sendTransactionAsync(fromAddress, constants.INITIAL_ERC20_BALANCE),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await noReturnErc20Token.approve.sendTransactionAsync(
-                erc20Proxy.address,
-                constants.INITIAL_ERC20_ALLOWANCE,
-                { from: fromAddress },
-            ),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multipleReturnErc20Token.setBalance.sendTransactionAsync(
-                fromAddress,
-                constants.INITIAL_ERC20_BALANCE,
-            ),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multipleReturnErc20Token.approve.sendTransactionAsync(
-                erc20Proxy.address,
-                constants.INITIAL_ERC20_ALLOWANCE,
-                { from: fromAddress },
-            ),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Deploy and configure ERC721 tokens and receiver
-        [erc721TokenA, erc721TokenB] = await erc721Wrapper.deployDummyTokensAsync();
-        erc721Receiver = await DummyERC721ReceiverContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.DummyERC721Receiver,
-            provider,
-            txDefaults,
-        );
-
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721AFromTokenId = erc721Balances[fromAddress][erc721TokenA.address][0];
-        erc721BFromTokenId = erc721Balances[fromAddress][erc721TokenB.address][0];
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-
-    describe('ERC20Proxy', () => {
-        it('should revert if undefined function is called', async () => {
-            const undefinedSelector = '0x01020304';
-            await expectTransactionFailedWithoutReasonAsync(
-                web3Wrapper.sendTransactionAsync({
-                    from: owner,
-                    to: erc20Proxy.address,
-                    value: constants.ZERO_AMOUNT,
-                    data: undefinedSelector,
-                }),
-            );
-        });
-        it('should have an id of 0xf47261b0', async () => {
-            const proxyId = await erc20Proxy.getProxyId.callAsync();
-            const expectedProxyId = '0xf47261b0';
-            expect(proxyId).to.equal(expectedProxyId);
-        });
-        describe('transferFrom', () => {
-            it('should successfully transfer tokens', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                // Perform a transfer from fromAddress to toAddress
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(amount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(amount),
-                );
-            });
-
-            it('should successfully transfer tokens that do not return a value', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address);
-                // Perform a transfer from fromAddress to toAddress
-                const initialFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const initialToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const newToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
-                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance.minus(amount));
-                expect(newToBalance).to.be.bignumber.equal(initialToBalance.plus(amount));
-            });
-
-            it('should successfully transfer tokens and ignore extra assetData', async () => {
-                // Construct ERC20 asset data
-                const extraData = '0102030405060708';
-                const encodedAssetData = `${assetDataUtils.encodeERC20AssetData(erc20TokenA.address)}${extraData}`;
-                // Perform a transfer from fromAddress to toAddress
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(amount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(amount),
-                );
-            });
-
-            it('should do nothing if transferring 0 amount of a token', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                // Perform a transfer from fromAddress to toAddress
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const amount = new BigNumber(0);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address],
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address],
-                );
-            });
-
-            it('should revert if allowances are too low', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                // Create allowance less than transfer amount. Set allowance on proxy.
-                const allowance = new BigNumber(0);
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await erc20TokenA.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: fromAddress,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                // Perform a transfer; expect this to fail.
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.TransferFailed,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.deep.equal(erc20Balances);
-            });
-
-            it('should revert if allowances are too low and token does not return a value', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address);
-                // Create allowance less than transfer amount. Set allowance on proxy.
-                const allowance = new BigNumber(0);
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await noReturnErc20Token.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: fromAddress,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const initialFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const initialToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
-                // Perform a transfer; expect this to fail.
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.TransferFailed,
-                );
-                const newFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const newToBalance = await noReturnErc20Token.balanceOf.callAsync(toAddress);
-                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance);
-                expect(newToBalance).to.be.bignumber.equal(initialToBalance);
-            });
-
-            it('should revert if caller is not authorized', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: notAuthorized,
-                    }),
-                    RevertReason.SenderNotAuthorized,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.deep.equal(erc20Balances);
-            });
-
-            it('should revert if token returns more than 32 bytes', async () => {
-                // Construct ERC20 asset data
-                const encodedAssetData = assetDataUtils.encodeERC20AssetData(multipleReturnErc20Token.address);
-                const amount = new BigNumber(10);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                const initialFromBalance = await multipleReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const initialToBalance = await multipleReturnErc20Token.balanceOf.callAsync(toAddress);
-                // Perform a transfer; expect this to fail.
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc20Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.TransferFailed,
-                );
-                const newFromBalance = await multipleReturnErc20Token.balanceOf.callAsync(fromAddress);
-                const newToBalance = await multipleReturnErc20Token.balanceOf.callAsync(toAddress);
-                expect(newFromBalance).to.be.bignumber.equal(initialFromBalance);
-                expect(newToBalance).to.be.bignumber.equal(initialToBalance);
-            });
-        });
-    });
-
-    describe('ERC721Proxy', () => {
-        it('should revert if undefined function is called', async () => {
-            const undefinedSelector = '0x01020304';
-            await expectTransactionFailedWithoutReasonAsync(
-                web3Wrapper.sendTransactionAsync({
-                    from: owner,
-                    to: erc721Proxy.address,
-                    value: constants.ZERO_AMOUNT,
-                    data: undefinedSelector,
-                }),
-            );
-        });
-        it('should have an id of 0x02571792', async () => {
-            const proxyId = await erc721Proxy.getProxyId.callAsync();
-            const expectedProxyId = '0x02571792';
-            expect(proxyId).to.equal(expectedProxyId);
-        });
-        describe('transferFrom', () => {
-            it('should successfully transfer tokens', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(1);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.bignumber.equal(toAddress);
-            });
-
-            it('should successfully transfer tokens and ignore extra assetData', async () => {
-                // Construct ERC721 asset data
-                const extraData = '0102030405060708';
-                const encodedAssetData = `${assetDataUtils.encodeERC721AssetData(
-                    erc721TokenA.address,
-                    erc721AFromTokenId,
-                )}${extraData}`;
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(1);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Verify transfer was successful
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.bignumber.equal(toAddress);
-            });
-
-            it('should not call onERC721Received when transferring to a smart contract', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(1);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    erc721Receiver.address,
-                    amount,
-                );
-                const logDecoder = new LogDecoder(web3Wrapper, { ...artifacts, ...tokensArtifacts });
-                const tx = await logDecoder.getTxWithDecodedLogsAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                        gas: constants.MAX_TRANSFER_FROM_GAS,
-                    }),
-                );
-                // Verify that no log was emitted by erc721 receiver
-                expect(tx.logs.length).to.be.equal(1);
-                // Verify transfer was successful
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.bignumber.equal(erc721Receiver.address);
-            });
-
-            it('should revert if transferring 0 amount of a token', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(0);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.InvalidAmount,
-                );
-                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwner).to.be.equal(ownerFromAsset);
-            });
-
-            it('should revert if transferring > 1 amount of a token', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(500);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.InvalidAmount,
-                );
-                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwner).to.be.equal(ownerFromAsset);
-            });
-
-            it('should revert if allowances are too low', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Remove transfer approval for fromAddress.
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await erc721TokenA.approve.sendTransactionAsync(constants.NULL_ADDRESS, erc721AFromTokenId, {
-                        from: fromAddress,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                // Perform a transfer; expect this to fail.
-                const amount = new BigNumber(1);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.TransferFailed,
-                );
-                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwner).to.be.equal(ownerFromAsset);
-            });
-
-            it('should revert if caller is not authorized', async () => {
-                // Construct ERC721 asset data
-                const encodedAssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                // Verify pre-condition
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                // Perform a transfer from fromAddress to toAddress
-                const amount = new BigNumber(1);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    encodedAssetData,
-                    fromAddress,
-                    toAddress,
-                    amount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: erc721Proxy.address,
-                        data,
-                        from: notAuthorized,
-                    }),
-                    RevertReason.SenderNotAuthorized,
-                );
-                const newOwner = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwner).to.be.equal(ownerFromAsset);
-            });
-        });
-    });
-    describe('MultiAssetProxy', () => {
-        it('should revert if undefined function is called', async () => {
-            const undefinedSelector = '0x01020304';
-            await expectTransactionFailedWithoutReasonAsync(
-                web3Wrapper.sendTransactionAsync({
-                    from: owner,
-                    to: multiAssetProxy.address,
-                    value: constants.ZERO_AMOUNT,
-                    data: undefinedSelector,
-                }),
-            );
-        });
-        it('should have an id of 0x94cfcdd7', async () => {
-            const proxyId = await multiAssetProxy.getProxyId.callAsync();
-            // first 4 bytes of `keccak256('MultiAsset(uint256[],bytes[])')`
-            const expectedProxyId = '0x94cfcdd7';
-            expect(proxyId).to.equal(expectedProxyId);
-        });
-        describe('transferFrom', () => {
-            it('should transfer a single ERC20 token', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const amounts = [erc20Amount];
-                const nestedAssetData = [erc20AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalAmount = inputAmount.times(erc20Amount);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
-                );
-            });
-            it('should successfully transfer multiple of the same ERC20 token', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount1 = new BigNumber(10);
-                const erc20Amount2 = new BigNumber(20);
-                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const amounts = [erc20Amount1, erc20Amount2];
-                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalAmount = inputAmount.times(erc20Amount1).plus(inputAmount.times(erc20Amount2));
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
-                );
-            });
-            it('should successfully transfer multiple different ERC20 tokens', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount1 = new BigNumber(10);
-                const erc20Amount2 = new BigNumber(20);
-                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
-                const amounts = [erc20Amount1, erc20Amount2];
-                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalErc20AAmount = inputAmount.times(erc20Amount1);
-                const totalErc20BAmount = inputAmount.times(erc20Amount2);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
-                );
-                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
-                );
-            });
-            it('should transfer a single ERC721 token', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc721Amount];
-                const nestedAssetData = [erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.equal(toAddress);
-            });
-            it('should successfully transfer multiple of the same ERC721 token', async () => {
-                const erc721Balances = await erc721Wrapper.getBalancesAsync();
-                const erc721AFromTokenId2 = erc721Balances[fromAddress][erc721TokenA.address][1];
-                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(
-                    erc721TokenA.address,
-                    erc721AFromTokenId2,
-                );
-                const inputAmount = new BigNumber(1);
-                const erc721Amount = new BigNumber(1);
-                const amounts = [erc721Amount, erc721Amount];
-                const nestedAssetData = [erc721AssetData1, erc721AssetData2];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset1).to.be.equal(fromAddress);
-                const ownerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
-                expect(ownerFromAsset2).to.be.equal(fromAddress);
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                        gas: constants.MAX_TRANSFER_FROM_GAS,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                const newOwnerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
-                expect(newOwnerFromAsset1).to.be.equal(toAddress);
-                expect(newOwnerFromAsset2).to.be.equal(toAddress);
-            });
-            it('should successfully transfer multiple different ERC721 tokens', async () => {
-                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(erc721TokenB.address, erc721BFromTokenId);
-                const inputAmount = new BigNumber(1);
-                const erc721Amount = new BigNumber(1);
-                const amounts = [erc721Amount, erc721Amount];
-                const nestedAssetData = [erc721AssetData1, erc721AssetData2];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset1).to.be.equal(fromAddress);
-                const ownerFromAsset2 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
-                expect(ownerFromAsset2).to.be.equal(fromAddress);
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                        gas: constants.MAX_TRANSFER_FROM_GAS,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                const newOwnerFromAsset2 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
-                expect(newOwnerFromAsset1).to.be.equal(toAddress);
-                expect(newOwnerFromAsset2).to.be.equal(toAddress);
-            });
-            it('should successfully transfer a combination of ERC20 and ERC721 tokens', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalAmount = inputAmount.times(erc20Amount);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
-                );
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.equal(toAddress);
-            });
-            it('should successfully transfer tokens and ignore extra assetData', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const extraData = '0102030405060708';
-                const assetData = `${assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                    amounts,
-                    nestedAssetData,
-                )}${extraData}`;
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset).to.be.equal(fromAddress);
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalAmount = inputAmount.times(erc20Amount);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalAmount),
-                );
-                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(newOwnerFromAsset).to.be.equal(toAddress);
-            });
-            it('should successfully transfer correct amounts when the `amount` > 1', async () => {
-                const inputAmount = new BigNumber(100);
-                const erc20Amount1 = new BigNumber(10);
-                const erc20Amount2 = new BigNumber(20);
-                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
-                const amounts = [erc20Amount1, erc20Amount2];
-                const nestedAssetData = [erc20AssetData1, erc20AssetData2];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalErc20AAmount = inputAmount.times(erc20Amount1);
-                const totalErc20BAmount = inputAmount.times(erc20Amount2);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
-                );
-                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
-                );
-            });
-            it('should successfully transfer a large amount of tokens', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount1 = new BigNumber(10);
-                const erc20Amount2 = new BigNumber(20);
-                const erc20AssetData1 = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc20AssetData2 = assetDataUtils.encodeERC20AssetData(erc20TokenB.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721Balances = await erc721Wrapper.getBalancesAsync();
-                const erc721AFromTokenId2 = erc721Balances[fromAddress][erc721TokenA.address][1];
-                const erc721BFromTokenId2 = erc721Balances[fromAddress][erc721TokenB.address][1];
-                const erc721AssetData1 = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const erc721AssetData2 = assetDataUtils.encodeERC721AssetData(
-                    erc721TokenA.address,
-                    erc721AFromTokenId2,
-                );
-                const erc721AssetData3 = assetDataUtils.encodeERC721AssetData(erc721TokenB.address, erc721BFromTokenId);
-                const erc721AssetData4 = assetDataUtils.encodeERC721AssetData(
-                    erc721TokenB.address,
-                    erc721BFromTokenId2,
-                );
-                const amounts = [erc721Amount, erc20Amount1, erc721Amount, erc20Amount2, erc721Amount, erc721Amount];
-                const nestedAssetData = [
-                    erc721AssetData1,
-                    erc20AssetData1,
-                    erc721AssetData2,
-                    erc20AssetData2,
-                    erc721AssetData3,
-                    erc721AssetData4,
-                ];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                const ownerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                expect(ownerFromAsset1).to.be.equal(fromAddress);
-                const ownerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
-                expect(ownerFromAsset2).to.be.equal(fromAddress);
-                const ownerFromAsset3 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
-                expect(ownerFromAsset3).to.be.equal(fromAddress);
-                const ownerFromAsset4 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId2);
-                expect(ownerFromAsset4).to.be.equal(fromAddress);
-                const erc20Balances = await erc20Wrapper.getBalancesAsync();
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                        gas: constants.MAX_EXECUTE_TRANSACTION_GAS,
-                    }),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                const newOwnerFromAsset1 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
-                const newOwnerFromAsset2 = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId2);
-                const newOwnerFromAsset3 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId);
-                const newOwnerFromAsset4 = await erc721TokenB.ownerOf.callAsync(erc721BFromTokenId2);
-                expect(newOwnerFromAsset1).to.be.equal(toAddress);
-                expect(newOwnerFromAsset2).to.be.equal(toAddress);
-                expect(newOwnerFromAsset3).to.be.equal(toAddress);
-                expect(newOwnerFromAsset4).to.be.equal(toAddress);
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const totalErc20AAmount = inputAmount.times(erc20Amount1);
-                const totalErc20BAmount = inputAmount.times(erc20Amount2);
-                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalErc20AAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenA.address].add(totalErc20AAmount),
-                );
-                expect(newBalances[fromAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[fromAddress][erc20TokenB.address].minus(totalErc20BAmount),
-                );
-                expect(newBalances[toAddress][erc20TokenB.address]).to.be.bignumber.equal(
-                    erc20Balances[toAddress][erc20TokenB.address].add(totalErc20BAmount),
-                );
-            });
-            it('should revert if a single transfer fails', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                // 2 is an invalid erc721 amount
-                const erc721Amount = new BigNumber(2);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.InvalidAmount,
-                );
-            });
-            it('should revert if an AssetProxy is not registered', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const invalidProxyId = '0x12345678';
-                const invalidErc721AssetData = `${invalidProxyId}${erc721AssetData.slice(10)}`;
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, invalidErc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.AssetProxyDoesNotExist,
-                );
-            });
-            it('should revert if the length of `amounts` does not match the length of `nestedAssetData`', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc20Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.LengthMismatch,
-                );
-            });
-            it('should revert if amounts multiplication results in an overflow', async () => {
-                const inputAmount = new BigNumber(2).pow(128);
-                const erc20Amount = new BigNumber(2).pow(128);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const amounts = [erc20Amount];
-                const nestedAssetData = [erc20AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.Uint256Overflow,
-                );
-            });
-            it('should revert if an element of `nestedAssetData` is < 4 bytes long', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = '0x123456';
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: authorized,
-                    }),
-                    RevertReason.LengthGreaterThan3Required,
-                );
-            });
-            it('should revert if caller is not authorized', async () => {
-                const inputAmount = new BigNumber(1);
-                const erc20Amount = new BigNumber(10);
-                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
-                const erc721Amount = new BigNumber(1);
-                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
-                const amounts = [erc20Amount, erc721Amount];
-                const nestedAssetData = [erc20AssetData, erc721AssetData];
-                const assetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(amounts, nestedAssetData);
-                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
-                    assetData,
-                    fromAddress,
-                    toAddress,
-                    inputAmount,
-                );
-                await expectTransactionFailedAsync(
-                    web3Wrapper.sendTransactionAsync({
-                        to: multiAssetProxy.address,
-                        data,
-                        from: notAuthorized,
-                    }),
-                    RevertReason.SenderNotAuthorized,
-                );
-            });
-        });
-    });
-});
-// tslint:enable:no-unnecessary-type-assertion
-// tslint:disable:max-file-line-count
diff --git a/contracts/core/test/exchange/core.ts b/contracts/core/test/exchange/core.ts
deleted file mode 100644
index 9b948f991..000000000
--- a/contracts/core/test/exchange/core.ts
+++ /dev/null
@@ -1,1178 +0,0 @@
-import { artifacts as interfacesArtifacts, IAssetDataContract } from '@0x/contracts-interfaces';
-import {
-    chaiSetup,
-    constants,
-    ERC20BalancesByOwner,
-    expectTransactionFailedAsync,
-    getLatestBlockTimestampAsync,
-    increaseTimeAndMineBlockAsync,
-    OrderFactory,
-    OrderStatus,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import {
-    artifacts as tokensArtifacts,
-    DummyERC20TokenContract,
-    DummyERC20TokenTransferEventArgs,
-    DummyERC721TokenContract,
-    DummyNoReturnERC20TokenContract,
-    ReentrantERC20TokenContract,
-} from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
-import { RevertReason, SignatureType, SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import * as chai from 'chai';
-import { LogWithDecodedArgs } from 'ethereum-types';
-import ethUtil = require('ethereumjs-util');
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { ExchangeCancelEventArgs, ExchangeContract } from '../../generated-wrappers/exchange';
-import { MultiAssetProxyContract } from '../../generated-wrappers/multi_asset_proxy';
-import { TestStaticCallReceiverContract } from '../../generated-wrappers/test_static_call_receiver';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-const assetDataInterface = new IAssetDataContract(
-    interfacesArtifacts.IAssetData.compilerOutput.abi,
-    constants.NULL_ADDRESS,
-    provider,
-);
-// tslint:disable:no-unnecessary-type-assertion
-describe('Exchange core', () => {
-    let makerAddress: string;
-    let owner: string;
-    let takerAddress: string;
-    let feeRecipientAddress: string;
-
-    let erc20TokenA: DummyERC20TokenContract;
-    let erc20TokenB: DummyERC20TokenContract;
-    let zrxToken: DummyERC20TokenContract;
-    let erc721Token: DummyERC721TokenContract;
-    let noReturnErc20Token: DummyNoReturnERC20TokenContract;
-    let reentrantErc20Token: ReentrantERC20TokenContract;
-    let exchange: ExchangeContract;
-    let erc20Proxy: ERC20ProxyContract;
-    let erc721Proxy: ERC721ProxyContract;
-    let multiAssetProxy: MultiAssetProxyContract;
-    let maliciousWallet: TestStaticCallReceiverContract;
-    let maliciousValidator: TestStaticCallReceiverContract;
-
-    let signedOrder: SignedOrder;
-    let erc20Balances: ERC20BalancesByOwner;
-    let exchangeWrapper: ExchangeWrapper;
-    let erc20Wrapper: ERC20Wrapper;
-    let erc721Wrapper: ERC721Wrapper;
-    let orderFactory: OrderFactory;
-
-    let erc721MakerAssetIds: BigNumber[];
-    let erc721TakerAssetIds: BigNumber[];
-
-    let defaultMakerAssetAddress: string;
-    let defaultTakerAssetAddress: string;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, makerAddress, takerAddress, feeRecipientAddress] = _.slice(accounts, 0, 4));
-
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-        erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
-
-        // Deploy AssetProxies, Exchange, tokens, and malicious contracts
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        multiAssetProxy = await MultiAssetProxyContract.deployFrom0xArtifactAsync(
-            artifacts.MultiAssetProxy,
-            provider,
-            txDefaults,
-        );
-        const numDummyErc20ToDeploy = 3;
-        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
-            numDummyErc20ToDeploy,
-            constants.DUMMY_TOKEN_DECIMALS,
-        );
-        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
-            provider,
-            txDefaults,
-            assetDataUtils.encodeERC20AssetData(zrxToken.address),
-        );
-        maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync(
-            artifacts.TestStaticCallReceiver,
-            provider,
-            txDefaults,
-        );
-        reentrantErc20Token = await ReentrantERC20TokenContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.ReentrantERC20Token,
-            provider,
-            txDefaults,
-            exchange.address,
-        );
-
-        // Configure ERC20Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Configure ERC721Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Configure MultiAssetProxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        // Configure Exchange
-        exchangeWrapper = new ExchangeWrapper(exchange, provider);
-        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
-        await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, owner);
-        await exchangeWrapper.registerAssetProxyAsync(multiAssetProxy.address, owner);
-
-        // Configure ERC20 tokens
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-
-        // Configure ERC721 tokens
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721MakerAssetIds = erc721Balances[makerAddress][erc721Token.address];
-        erc721TakerAssetIds = erc721Balances[takerAddress][erc721Token.address];
-
-        // Configure order defaults
-        defaultMakerAssetAddress = erc20TokenA.address;
-        defaultTakerAssetAddress = erc20TokenB.address;
-        const defaultOrderParams = {
-            ...constants.STATIC_ORDER_PARAMS,
-            exchangeAddress: exchange.address,
-            makerAddress,
-            feeRecipientAddress,
-            makerAssetData: assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(defaultTakerAssetAddress),
-        };
-        const privateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
-        orderFactory = new OrderFactory(privateKey, defaultOrderParams);
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('fillOrder', () => {
-        beforeEach(async () => {
-            erc20Balances = await erc20Wrapper.getBalancesAsync();
-            signedOrder = await orderFactory.newSignedOrderAsync();
-        });
-
-        const reentrancyTest = (functionNames: string[]) => {
-            _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                const description = `should not allow fillOrder to reenter the Exchange contract via ${functionName}`;
-                it(description, async () => {
-                    signedOrder = await orderFactory.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                    });
-                    await web3Wrapper.awaitTransactionSuccessAsync(
-                        await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                        constants.AWAIT_TRANSACTION_MINED_MS,
-                    );
-                    await expectTransactionFailedAsync(
-                        exchangeWrapper.fillOrderAsync(signedOrder, takerAddress),
-                        RevertReason.TransferFailed,
-                    );
-                });
-            });
-        };
-        describe('fillOrder reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-        it('should throw if signature is invalid', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-
-            const v = ethUtil.toBuffer(signedOrder.signature.slice(0, 4));
-            const invalidR = ethUtil.sha3('invalidR');
-            const invalidS = ethUtil.sha3('invalidS');
-            const signatureType = ethUtil.toBuffer(`0x${signedOrder.signature.slice(-2)}`);
-            const invalidSigBuff = Buffer.concat([v, invalidR, invalidS, signatureType]);
-            const invalidSigHex = `0x${invalidSigBuff.toString('hex')}`;
-            signedOrder.signature = invalidSigHex;
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress),
-                RevertReason.InvalidOrderSignature,
-            );
-        });
-
-        it('should throw if no value is filled', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync();
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should revert if `isValidSignature` tries to update state when SignatureType=Wallet', async () => {
-            const maliciousMakerAddress = maliciousWallet.address;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc20TokenA.setBalance.sendTransactionAsync(
-                    maliciousMakerAddress,
-                    constants.INITIAL_ERC20_BALANCE,
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await maliciousWallet.approveERC20.sendTransactionAsync(
-                    erc20TokenA.address,
-                    erc20Proxy.address,
-                    constants.INITIAL_ERC20_ALLOWANCE,
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAddress: maliciousMakerAddress,
-                makerFee: constants.ZERO_AMOUNT,
-            });
-            signedOrder.signature = `0x0${SignatureType.Wallet}`;
-            await expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress),
-                RevertReason.WalletError,
-            );
-        });
-
-        it('should revert if `isValidSignature` tries to update state when SignatureType=Validator', async () => {
-            const isApproved = true;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await exchange.setSignatureValidatorApproval.sendTransactionAsync(
-                    maliciousValidator.address,
-                    isApproved,
-                    { from: makerAddress },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            signedOrder.signature = `${maliciousValidator.address}0${SignatureType.Validator}`;
-            await expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress),
-                RevertReason.ValidatorError,
-            );
-        });
-
-        it('should not emit transfer events for transfers where from == to', async () => {
-            const txReceipt = await exchangeWrapper.fillOrderAsync(signedOrder, makerAddress);
-            const logs = txReceipt.logs;
-            const transferLogs = _.filter(
-                logs,
-                log => (log as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).event === 'Transfer',
-            );
-            expect(transferLogs.length).to.be.equal(2);
-            expect((transferLogs[0] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).address).to.be.equal(
-                zrxToken.address,
-            );
-            expect((transferLogs[0] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._from).to.be.equal(
-                makerAddress,
-            );
-            expect((transferLogs[0] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._to).to.be.equal(
-                feeRecipientAddress,
-            );
-            expect(
-                (transferLogs[0] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._value,
-            ).to.be.bignumber.equal(signedOrder.makerFee);
-            expect((transferLogs[1] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).address).to.be.equal(
-                zrxToken.address,
-            );
-            expect((transferLogs[1] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._from).to.be.equal(
-                makerAddress,
-            );
-            expect((transferLogs[1] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._to).to.be.equal(
-                feeRecipientAddress,
-            );
-            expect(
-                (transferLogs[1] as LogWithDecodedArgs<DummyERC20TokenTransferEventArgs>).args._value,
-            ).to.be.bignumber.equal(signedOrder.takerFee);
-        });
-    });
-
-    describe('Testing exchange of ERC20 tokens with no return values', () => {
-        before(async () => {
-            noReturnErc20Token = await DummyNoReturnERC20TokenContract.deployFrom0xArtifactAsync(
-                tokensArtifacts.DummyNoReturnERC20Token,
-                provider,
-                txDefaults,
-                constants.DUMMY_TOKEN_NAME,
-                constants.DUMMY_TOKEN_SYMBOL,
-                constants.DUMMY_TOKEN_DECIMALS,
-                constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await noReturnErc20Token.setBalance.sendTransactionAsync(makerAddress, constants.INITIAL_ERC20_BALANCE),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await noReturnErc20Token.approve.sendTransactionAsync(
-                    erc20Proxy.address,
-                    constants.INITIAL_ERC20_ALLOWANCE,
-                    { from: makerAddress },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-        });
-        it('should transfer the correct amounts when makerAssetAmount === takerAssetAmount', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData: assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-
-            const initialMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const initialFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-
-            const finalMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const finalFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(initialMakerBalanceA.minus(signedOrder.makerAssetAmount));
-            expect(finalMakerBalanceB).to.be.bignumber.equal(initialMakerBalanceB.plus(signedOrder.takerAssetAmount));
-            expect(finalTakerBalanceA).to.be.bignumber.equal(initialTakerBalanceA.plus(signedOrder.makerAssetAmount));
-            expect(finalTakerBalanceB).to.be.bignumber.equal(initialTakerBalanceB.minus(signedOrder.takerAssetAmount));
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(initialMakerZrxBalance.minus(signedOrder.makerFee));
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(initialTakerZrxBalance.minus(signedOrder.takerFee));
-            expect(finalFeeRecipientZrxBalance).to.be.bignumber.equal(
-                initialFeeRecipientZrxBalance.plus(signedOrder.makerFee.plus(signedOrder.takerFee)),
-            );
-        });
-        it('should transfer the correct amounts when makerAssetAmount > takerAssetAmount', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData: assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(200), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-
-            const initialMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const initialFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-
-            const finalMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const finalFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(initialMakerBalanceA.minus(signedOrder.makerAssetAmount));
-            expect(finalMakerBalanceB).to.be.bignumber.equal(initialMakerBalanceB.plus(signedOrder.takerAssetAmount));
-            expect(finalTakerBalanceA).to.be.bignumber.equal(initialTakerBalanceA.plus(signedOrder.makerAssetAmount));
-            expect(finalTakerBalanceB).to.be.bignumber.equal(initialTakerBalanceB.minus(signedOrder.takerAssetAmount));
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(initialMakerZrxBalance.minus(signedOrder.makerFee));
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(initialTakerZrxBalance.minus(signedOrder.takerFee));
-            expect(finalFeeRecipientZrxBalance).to.be.bignumber.equal(
-                initialFeeRecipientZrxBalance.plus(signedOrder.makerFee.plus(signedOrder.takerFee)),
-            );
-        });
-        it('should transfer the correct amounts when makerAssetAmount < takerAssetAmount', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData: assetDataUtils.encodeERC20AssetData(noReturnErc20Token.address),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(200), 18),
-            });
-
-            const initialMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const initialFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-
-            const finalMakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await noReturnErc20Token.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const finalFeeRecipientZrxBalance = await zrxToken.balanceOf.callAsync(feeRecipientAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(initialMakerBalanceA.minus(signedOrder.makerAssetAmount));
-            expect(finalMakerBalanceB).to.be.bignumber.equal(initialMakerBalanceB.plus(signedOrder.takerAssetAmount));
-            expect(finalTakerBalanceA).to.be.bignumber.equal(initialTakerBalanceA.plus(signedOrder.makerAssetAmount));
-            expect(finalTakerBalanceB).to.be.bignumber.equal(initialTakerBalanceB.minus(signedOrder.takerAssetAmount));
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(initialMakerZrxBalance.minus(signedOrder.makerFee));
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(initialTakerZrxBalance.minus(signedOrder.takerFee));
-            expect(finalFeeRecipientZrxBalance).to.be.bignumber.equal(
-                initialFeeRecipientZrxBalance.plus(signedOrder.makerFee.plus(signedOrder.takerFee)),
-            );
-        });
-    });
-
-    describe('cancelOrder', () => {
-        beforeEach(async () => {
-            erc20Balances = await erc20Wrapper.getBalancesAsync();
-            signedOrder = await orderFactory.newSignedOrderAsync();
-        });
-
-        it('should throw if not sent by maker', async () => {
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrderAsync(signedOrder, takerAddress),
-                RevertReason.InvalidMaker,
-            );
-        });
-
-        it('should throw if makerAssetAmount is 0', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(0),
-            });
-
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should throw if takerAssetAmount is 0', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                takerAssetAmount: new BigNumber(0),
-            });
-
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should be able to cancel a full order', async () => {
-            await exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                    takerAssetFillAmount: signedOrder.takerAssetAmount.div(2),
-                }),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should log 1 event with correct arguments', async () => {
-            const res = await exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress);
-            expect(res.logs).to.have.length(1);
-
-            const log = res.logs[0] as LogWithDecodedArgs<ExchangeCancelEventArgs>;
-            const logArgs = log.args;
-
-            expect(signedOrder.makerAddress).to.be.equal(logArgs.makerAddress);
-            expect(signedOrder.makerAddress).to.be.equal(logArgs.senderAddress);
-            expect(signedOrder.feeRecipientAddress).to.be.equal(logArgs.feeRecipientAddress);
-            expect(signedOrder.makerAssetData).to.be.equal(logArgs.makerAssetData);
-            expect(signedOrder.takerAssetData).to.be.equal(logArgs.takerAssetData);
-            expect(orderHashUtils.getOrderHashHex(signedOrder)).to.be.equal(logArgs.orderHash);
-        });
-
-        it('should throw if already cancelled', async () => {
-            await exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should throw if order is expired', async () => {
-            const currentTimestamp = await getLatestBlockTimestampAsync();
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                expirationTimeSeconds: new BigNumber(currentTimestamp).sub(10),
-            });
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should throw if rounding error is greater than 0.1%', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1001),
-                takerAssetAmount: new BigNumber(3),
-            });
-
-            const fillTakerAssetAmount1 = new BigNumber(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount: fillTakerAssetAmount1,
-            });
-
-            const fillTakerAssetAmount2 = new BigNumber(1);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                    takerAssetFillAmount: fillTakerAssetAmount2,
-                }),
-                RevertReason.RoundingError,
-            );
-        });
-    });
-
-    describe('cancelOrdersUpTo', () => {
-        it('should fail to set orderEpoch less than current orderEpoch', async () => {
-            const orderEpoch = new BigNumber(1);
-            await exchangeWrapper.cancelOrdersUpToAsync(orderEpoch, makerAddress);
-            const lesserOrderEpoch = new BigNumber(0);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrdersUpToAsync(lesserOrderEpoch, makerAddress),
-                RevertReason.InvalidNewOrderEpoch,
-            );
-        });
-
-        it('should fail to set orderEpoch equal to existing orderEpoch', async () => {
-            const orderEpoch = new BigNumber(1);
-            await exchangeWrapper.cancelOrdersUpToAsync(orderEpoch, makerAddress);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.cancelOrdersUpToAsync(orderEpoch, makerAddress),
-                RevertReason.InvalidNewOrderEpoch,
-            );
-        });
-
-        it('should cancel only orders with a orderEpoch less than existing orderEpoch', async () => {
-            // Cancel all transactions with a orderEpoch less than 1
-            const orderEpoch = new BigNumber(1);
-            await exchangeWrapper.cancelOrdersUpToAsync(orderEpoch, makerAddress);
-
-            // Create 3 orders with orderEpoch values: 0,1,2,3
-            // Since we cancelled with orderEpoch=1, orders with orderEpoch<=1 will not be processed
-            erc20Balances = await erc20Wrapper.getBalancesAsync();
-            const signedOrders = [
-                await orderFactory.newSignedOrderAsync({
-                    makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(9), 18),
-                    takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(9), 18),
-                    salt: new BigNumber(0),
-                }),
-                await orderFactory.newSignedOrderAsync({
-                    makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(79), 18),
-                    takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(79), 18),
-                    salt: new BigNumber(1),
-                }),
-                await orderFactory.newSignedOrderAsync({
-                    makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(979), 18),
-                    takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(979), 18),
-                    salt: new BigNumber(2),
-                }),
-                await orderFactory.newSignedOrderAsync({
-                    makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(7979), 18),
-                    takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(7979), 18),
-                    salt: new BigNumber(3),
-                }),
-            ];
-            await exchangeWrapper.batchFillOrdersNoThrowAsync(signedOrders, takerAddress, {
-                // HACK(albrow): We need to hardcode the gas estimate here because
-                // the Geth gas estimator doesn't work with the way we use
-                // delegatecall and swallow errors.
-                gas: 600000,
-            });
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            const fillMakerAssetAmount = signedOrders[2].makerAssetAmount.add(signedOrders[3].makerAssetAmount);
-            const fillTakerAssetAmount = signedOrders[2].takerAssetAmount.add(signedOrders[3].takerAssetAmount);
-            const makerFee = signedOrders[2].makerFee.add(signedOrders[3].makerFee);
-            const takerFee = signedOrders[2].takerFee.add(signedOrders[3].takerFee);
-            expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultMakerAssetAddress].minus(fillMakerAssetAmount),
-            );
-            expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultTakerAssetAddress].add(fillTakerAssetAmount),
-            );
-            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-            );
-            expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultTakerAssetAddress].minus(fillTakerAssetAmount),
-            );
-            expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultMakerAssetAddress].add(fillMakerAssetAmount),
-            );
-            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-            );
-            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-            );
-        });
-    });
-
-    describe('Testing Exchange of ERC721 Tokens', () => {
-        it('should throw when maker does not own the token with id makerAssetId', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721TakerAssetIds[0];
-            const takerAssetId = erc721TakerAssetIds[1];
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            });
-            // Verify pre-conditions
-            const initialOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(initialOwnerMakerAsset).to.be.bignumber.not.equal(makerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount }),
-                RevertReason.TransferFailed,
-            );
-        });
-
-        it('should throw when taker does not own the token with id takerAssetId', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721MakerAssetIds[0];
-            const takerAssetId = erc721MakerAssetIds[1];
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            });
-            // Verify pre-conditions
-            const initialOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(initialOwnerMakerAsset).to.be.bignumber.equal(makerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.not.equal(takerAddress);
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount }),
-                RevertReason.TransferFailed,
-            );
-        });
-
-        it('should throw when makerAssetAmount is greater than 1', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721MakerAssetIds[0];
-            const takerAssetId = erc721TakerAssetIds[0];
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(2),
-                takerAssetAmount: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            });
-            // Verify pre-conditions
-            const initialOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(initialOwnerMakerAsset).to.be.bignumber.equal(makerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount }),
-                RevertReason.InvalidAmount,
-            );
-        });
-
-        it('should throw when takerAssetAmount is greater than 1', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721MakerAssetIds[0];
-            const takerAssetId = erc721TakerAssetIds[0];
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: new BigNumber(500),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            });
-            // Verify pre-conditions
-            const initialOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(initialOwnerMakerAsset).to.be.bignumber.equal(makerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount }),
-                RevertReason.InvalidAmount,
-            );
-        });
-
-        it('should throw on partial fill', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721MakerAssetIds[0];
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultTakerAssetAddress),
-            });
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount }),
-                RevertReason.RoundingError,
-            );
-        });
-    });
-
-    describe('Testing exchange of multiple assets', () => {
-        it('should allow multiple assets to be exchanged for a single asset', async () => {
-            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
-            const makerNestedAssetData = [
-                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
-                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
-            ];
-            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                makerAmounts,
-                makerNestedAssetData,
-            );
-            const makerAssetAmount = new BigNumber(1);
-            const takerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-            const takerAssetAmount = new BigNumber(10);
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData,
-                takerAssetData,
-                makerAssetAmount,
-                takerAssetAmount,
-                makerFee: constants.ZERO_AMOUNT,
-                takerFee: constants.ZERO_AMOUNT,
-            });
-
-            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-
-            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(
-                initialMakerBalanceA.minus(makerAmounts[0].times(makerAssetAmount)),
-            );
-            expect(finalMakerBalanceB).to.be.bignumber.equal(
-                initialMakerBalanceB.minus(makerAmounts[1].times(makerAssetAmount)),
-            );
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(initialMakerZrxBalance.plus(takerAssetAmount));
-            expect(finalTakerBalanceA).to.be.bignumber.equal(
-                initialTakerBalanceA.plus(makerAmounts[0].times(makerAssetAmount)),
-            );
-            expect(finalTakerBalanceB).to.be.bignumber.equal(
-                initialTakerBalanceB.plus(makerAmounts[1].times(makerAssetAmount)),
-            );
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(initialTakerZrxBalance.minus(takerAssetAmount));
-        });
-        it('should allow multiple assets to be exchanged for multiple assets', async () => {
-            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
-            const makerNestedAssetData = [
-                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
-                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
-            ];
-            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                makerAmounts,
-                makerNestedAssetData,
-            );
-            const makerAssetAmount = new BigNumber(1);
-            const takerAmounts = [new BigNumber(10), new BigNumber(1)];
-            const takerAssetId = erc721TakerAssetIds[0];
-            const takerNestedAssetData = [
-                assetDataUtils.encodeERC20AssetData(zrxToken.address),
-                assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            ];
-            const takerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                takerAmounts,
-                takerNestedAssetData,
-            );
-            const takerAssetAmount = new BigNumber(1);
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData,
-                takerAssetData,
-                makerAssetAmount,
-                takerAssetAmount,
-                makerFee: constants.ZERO_AMOUNT,
-                takerFee: constants.ZERO_AMOUNT,
-            });
-
-            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-
-            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-            const finalOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(
-                initialMakerBalanceA.minus(makerAmounts[0].times(makerAssetAmount)),
-            );
-            expect(finalMakerBalanceB).to.be.bignumber.equal(
-                initialMakerBalanceB.minus(makerAmounts[1].times(makerAssetAmount)),
-            );
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(
-                initialMakerZrxBalance.plus(takerAmounts[0].times(takerAssetAmount)),
-            );
-            expect(finalTakerBalanceA).to.be.bignumber.equal(
-                initialTakerBalanceA.plus(makerAmounts[0].times(makerAssetAmount)),
-            );
-            expect(finalTakerBalanceB).to.be.bignumber.equal(
-                initialTakerBalanceB.plus(makerAmounts[1].times(makerAssetAmount)),
-            );
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(
-                initialTakerZrxBalance.minus(takerAmounts[0].times(takerAssetAmount)),
-            );
-            expect(finalOwnerTakerAsset).to.be.equal(makerAddress);
-        });
-        it('should allow an order selling multiple assets to be partially filled', async () => {
-            const makerAmounts = [new BigNumber(10), new BigNumber(20)];
-            const makerNestedAssetData = [
-                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
-                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
-            ];
-            const makerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                makerAmounts,
-                makerNestedAssetData,
-            );
-            const makerAssetAmount = new BigNumber(30);
-            const takerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-            const takerAssetAmount = new BigNumber(10);
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData,
-                takerAssetData,
-                makerAssetAmount,
-                takerAssetAmount,
-                makerFee: constants.ZERO_AMOUNT,
-                takerFee: constants.ZERO_AMOUNT,
-            });
-
-            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            const takerAssetFillAmount = takerAssetAmount.dividedToIntegerBy(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount,
-            });
-
-            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(
-                initialMakerBalanceA.minus(
-                    makerAmounts[0].times(
-                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalMakerBalanceB).to.be.bignumber.equal(
-                initialMakerBalanceB.minus(
-                    makerAmounts[1].times(
-                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(
-                initialMakerZrxBalance.plus(
-                    takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                ),
-            );
-            expect(finalTakerBalanceA).to.be.bignumber.equal(
-                initialTakerBalanceA.plus(
-                    makerAmounts[0].times(
-                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalTakerBalanceB).to.be.bignumber.equal(
-                initialTakerBalanceB.plus(
-                    makerAmounts[1].times(
-                        makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(
-                initialTakerZrxBalance.minus(
-                    takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                ),
-            );
-        });
-        it('should allow an order buying multiple assets to be partially filled', async () => {
-            const takerAmounts = [new BigNumber(10), new BigNumber(20)];
-            const takerNestedAssetData = [
-                assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
-                assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
-            ];
-            const takerAssetData = assetDataInterface.MultiAsset.getABIEncodedTransactionData(
-                takerAmounts,
-                takerNestedAssetData,
-            );
-            const takerAssetAmount = new BigNumber(30);
-            const makerAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-            const makerAssetAmount = new BigNumber(10);
-            signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetData,
-                takerAssetData,
-                makerAssetAmount,
-                takerAssetAmount,
-                makerFee: constants.ZERO_AMOUNT,
-                takerFee: constants.ZERO_AMOUNT,
-            });
-
-            const initialMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const initialMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const initialMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const initialTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const initialTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const initialTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            const takerAssetFillAmount = takerAssetAmount.dividedToIntegerBy(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount,
-            });
-
-            const finalMakerBalanceA = await erc20TokenA.balanceOf.callAsync(makerAddress);
-            const finalMakerBalanceB = await erc20TokenB.balanceOf.callAsync(makerAddress);
-            const finalMakerZrxBalance = await zrxToken.balanceOf.callAsync(makerAddress);
-            const finalTakerBalanceA = await erc20TokenA.balanceOf.callAsync(takerAddress);
-            const finalTakerBalanceB = await erc20TokenB.balanceOf.callAsync(takerAddress);
-            const finalTakerZrxBalance = await zrxToken.balanceOf.callAsync(takerAddress);
-
-            expect(finalMakerBalanceA).to.be.bignumber.equal(
-                initialMakerBalanceA.plus(
-                    takerAmounts[0].times(
-                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalMakerBalanceB).to.be.bignumber.equal(
-                initialMakerBalanceB.plus(
-                    takerAmounts[1].times(
-                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalMakerZrxBalance).to.be.bignumber.equal(
-                initialMakerZrxBalance.minus(
-                    makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                ),
-            );
-            expect(finalTakerBalanceA).to.be.bignumber.equal(
-                initialTakerBalanceA.minus(
-                    takerAmounts[0].times(
-                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalTakerBalanceB).to.be.bignumber.equal(
-                initialTakerBalanceB.minus(
-                    takerAmounts[1].times(
-                        takerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                    ),
-                ),
-            );
-            expect(finalTakerZrxBalance).to.be.bignumber.equal(
-                initialTakerZrxBalance.plus(
-                    makerAssetAmount.times(takerAssetFillAmount).dividedToIntegerBy(takerAssetAmount),
-                ),
-            );
-        });
-    });
-
-    describe('getOrderInfo', () => {
-        beforeEach(async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync();
-        });
-        it('should return the correct orderInfo for an unfilled valid order', async () => {
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = new BigNumber(0);
-            const expectedOrderStatus = OrderStatus.FILLABLE;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for a fully filled order', async () => {
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount;
-            const expectedOrderStatus = OrderStatus.FULLY_FILLED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for a partially filled order', async () => {
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount });
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = takerAssetFillAmount;
-            const expectedOrderStatus = OrderStatus.FILLABLE;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for a cancelled and unfilled order', async () => {
-            await exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = new BigNumber(0);
-            const expectedOrderStatus = OrderStatus.CANCELLED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for a cancelled and partially filled order', async () => {
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount });
-            await exchangeWrapper.cancelOrderAsync(signedOrder, makerAddress);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = takerAssetFillAmount;
-            const expectedOrderStatus = OrderStatus.CANCELLED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for an expired and unfilled order', async () => {
-            const currentTimestamp = await getLatestBlockTimestampAsync();
-            const timeUntilExpiration = signedOrder.expirationTimeSeconds.minus(currentTimestamp).toNumber();
-            await increaseTimeAndMineBlockAsync(timeUntilExpiration);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = new BigNumber(0);
-            const expectedOrderStatus = OrderStatus.EXPIRED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for an expired and partially filled order', async () => {
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, { takerAssetFillAmount });
-            const currentTimestamp = await getLatestBlockTimestampAsync();
-            const timeUntilExpiration = signedOrder.expirationTimeSeconds.minus(currentTimestamp).toNumber();
-            await increaseTimeAndMineBlockAsync(timeUntilExpiration);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = takerAssetFillAmount;
-            const expectedOrderStatus = OrderStatus.EXPIRED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for an expired and fully filled order', async () => {
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress);
-            const currentTimestamp = await getLatestBlockTimestampAsync();
-            const timeUntilExpiration = signedOrder.expirationTimeSeconds.minus(currentTimestamp).toNumber();
-            await increaseTimeAndMineBlockAsync(timeUntilExpiration);
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount;
-            // FULLY_FILLED takes precedence over EXPIRED
-            const expectedOrderStatus = OrderStatus.FULLY_FILLED;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for an order with a makerAssetAmount of 0', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({ makerAssetAmount: new BigNumber(0) });
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = new BigNumber(0);
-            const expectedOrderStatus = OrderStatus.INVALID_MAKER_ASSET_AMOUNT;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-        it('should return the correct orderInfo for an order with a takerAssetAmount of 0', async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync({ takerAssetAmount: new BigNumber(0) });
-            const orderInfo = await exchangeWrapper.getOrderInfoAsync(signedOrder);
-            const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-            const expectedTakerAssetFilledAmount = new BigNumber(0);
-            const expectedOrderStatus = OrderStatus.INVALID_TAKER_ASSET_AMOUNT;
-            expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-            expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-            expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-        });
-    });
-});
-// tslint:disable:max-file-line-count
-// tslint:enable:no-unnecessary-type-assertion
diff --git a/contracts/core/test/exchange/dispatcher.ts b/contracts/core/test/exchange/dispatcher.ts
deleted file mode 100644
index 5b1ac1e20..000000000
--- a/contracts/core/test/exchange/dispatcher.ts
+++ /dev/null
@@ -1,284 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    expectTransactionFailedAsync,
-    LogDecoder,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { DummyERC20TokenContract } from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils } from '@0x/order-utils';
-import { AssetProxyId, RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import { LogWithDecodedArgs } from 'ethereum-types';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import {
-    TestAssetProxyDispatcherAssetProxyRegisteredEventArgs,
-    TestAssetProxyDispatcherContract,
-} from '../../generated-wrappers/test_asset_proxy_dispatcher';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-// tslint:disable:no-unnecessary-type-assertion
-describe('AssetProxyDispatcher', () => {
-    let owner: string;
-    let notOwner: string;
-    let makerAddress: string;
-    let takerAddress: string;
-
-    let zrxToken: DummyERC20TokenContract;
-    let erc20Proxy: ERC20ProxyContract;
-    let erc721Proxy: ERC721ProxyContract;
-    let assetProxyDispatcher: TestAssetProxyDispatcherContract;
-
-    let erc20Wrapper: ERC20Wrapper;
-    let erc721Wrapper: ERC721Wrapper;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        // Setup accounts & addresses
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, notOwner, makerAddress, takerAddress] = _.slice(accounts, 0, 4));
-
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-        erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
-
-        const numDummyErc20ToDeploy = 1;
-        [zrxToken] = await erc20Wrapper.deployDummyTokensAsync(numDummyErc20ToDeploy, constants.DUMMY_TOKEN_DECIMALS);
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-
-        assetProxyDispatcher = await TestAssetProxyDispatcherContract.deployFrom0xArtifactAsync(
-            artifacts.TestAssetProxyDispatcher,
-            provider,
-            txDefaults,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(assetProxyDispatcher.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(assetProxyDispatcher.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('registerAssetProxy', () => {
-        it('should record proxy upon registration', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC20);
-            expect(proxyAddress).to.be.equal(erc20Proxy.address);
-        });
-
-        it('should be able to record multiple proxies', async () => {
-            // Record first proxy
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            let proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC20);
-            expect(proxyAddress).to.be.equal(erc20Proxy.address);
-            // Record another proxy
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
-                    from: owner,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC721);
-            expect(proxyAddress).to.be.equal(erc721Proxy.address);
-        });
-
-        it('should throw if a proxy with the same id is already registered', async () => {
-            // Initial registration
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC20);
-            expect(proxyAddress).to.be.equal(erc20Proxy.address);
-            // Deploy a new version of the ERC20 Transfer Proxy contract
-            const newErc20TransferProxy = await ERC20ProxyContract.deployFrom0xArtifactAsync(
-                artifacts.ERC20Proxy,
-                provider,
-                txDefaults,
-            );
-            // Register new ERC20 Transfer Proxy contract
-            return expectTransactionFailedAsync(
-                assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(newErc20TransferProxy.address, {
-                    from: owner,
-                }),
-                RevertReason.AssetProxyAlreadyExists,
-            );
-        });
-
-        it('should throw if requesting address is not owner', async () => {
-            return expectTransactionFailedAsync(
-                assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: notOwner }),
-                RevertReason.OnlyContractOwner,
-            );
-        });
-
-        it('should log an event with correct arguments when an asset proxy is registered', async () => {
-            const logDecoder = new LogDecoder(web3Wrapper, artifacts);
-            const txReceipt = await logDecoder.getTxWithDecodedLogsAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-            );
-            const logs = txReceipt.logs;
-            const log = logs[0] as LogWithDecodedArgs<TestAssetProxyDispatcherAssetProxyRegisteredEventArgs>;
-            expect(log.args.id).to.equal(AssetProxyId.ERC20);
-            expect(log.args.assetProxy).to.equal(erc20Proxy.address);
-        });
-    });
-
-    describe('getAssetProxy', () => {
-        it('should return correct address of registered proxy', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC20);
-            expect(proxyAddress).to.be.equal(erc20Proxy.address);
-        });
-
-        it('should return NULL address if requesting non-existent proxy', async () => {
-            const proxyAddress = await assetProxyDispatcher.getAssetProxy.callAsync(AssetProxyId.ERC20);
-            expect(proxyAddress).to.be.equal(constants.NULL_ADDRESS);
-        });
-    });
-
-    describe('dispatchTransferFrom', () => {
-        it('should dispatch transfer to registered proxy', async () => {
-            // Register ERC20 proxy
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Construct metadata for ERC20 proxy
-            const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-
-            // Perform a transfer from makerAddress to takerAddress
-            const erc20Balances = await erc20Wrapper.getBalancesAsync();
-            const amount = new BigNumber(10);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.publicDispatchTransferFrom.sendTransactionAsync(
-                    encodedAssetData,
-                    makerAddress,
-                    takerAddress,
-                    amount,
-                    { from: owner },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Verify transfer was successful
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrxToken.address].minus(amount),
-            );
-            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrxToken.address].add(amount),
-            );
-        });
-
-        it('should not dispatch a transfer if amount == 0', async () => {
-            // Register ERC20 proxy
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Construct metadata for ERC20 proxy
-            const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-
-            // Perform a transfer from makerAddress to takerAddress
-            const erc20Balances = await erc20Wrapper.getBalancesAsync();
-            const amount = constants.ZERO_AMOUNT;
-            const txReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.publicDispatchTransferFrom.sendTransactionAsync(
-                    encodedAssetData,
-                    makerAddress,
-                    takerAddress,
-                    amount,
-                    { from: owner },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            expect(txReceipt.logs.length).to.be.equal(0);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.deep.equal(erc20Balances);
-        });
-
-        it('should not dispatch a transfer if from == to', async () => {
-            // Register ERC20 proxy
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Construct metadata for ERC20 proxy
-            const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-
-            // Perform a transfer from makerAddress to takerAddress
-            const erc20Balances = await erc20Wrapper.getBalancesAsync();
-            const amount = new BigNumber(10);
-            const txReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
-                await assetProxyDispatcher.publicDispatchTransferFrom.sendTransactionAsync(
-                    encodedAssetData,
-                    makerAddress,
-                    makerAddress,
-                    amount,
-                    { from: owner },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            expect(txReceipt.logs.length).to.be.equal(0);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.deep.equal(erc20Balances);
-        });
-
-        it('should throw if dispatching to unregistered proxy', async () => {
-            // Construct metadata for ERC20 proxy
-            const encodedAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-            // Perform a transfer from makerAddress to takerAddress
-            const amount = new BigNumber(10);
-            return expectTransactionFailedAsync(
-                assetProxyDispatcher.publicDispatchTransferFrom.sendTransactionAsync(
-                    encodedAssetData,
-                    makerAddress,
-                    takerAddress,
-                    amount,
-                    { from: owner },
-                ),
-                RevertReason.AssetProxyDoesNotExist,
-            );
-        });
-    });
-});
-// tslint:enable:no-unnecessary-type-assertion
diff --git a/contracts/core/test/exchange/fill_order.ts b/contracts/core/test/exchange/fill_order.ts
deleted file mode 100644
index 2bdbe4855..000000000
--- a/contracts/core/test/exchange/fill_order.ts
+++ /dev/null
@@ -1,314 +0,0 @@
-import {
-    AllowanceAmountScenario,
-    AssetDataScenario,
-    BalanceAmountScenario,
-    chaiSetup,
-    ExpirationTimeSecondsScenario,
-    FeeRecipientAddressScenario,
-    FillScenario,
-    OrderAssetAmountScenario,
-    provider,
-    TakerAssetFillAmountScenario,
-    TakerScenario,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import * as _ from 'lodash';
-
-import {
-    FillOrderCombinatorialUtils,
-    fillOrderCombinatorialUtilsFactoryAsync,
-} from '../utils/fill_order_combinatorial_utils';
-
-chaiSetup.configure();
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-const defaultFillScenario = {
-    orderScenario: {
-        takerScenario: TakerScenario.Unspecified,
-        feeRecipientScenario: FeeRecipientAddressScenario.EthUserAddress,
-        makerAssetAmountScenario: OrderAssetAmountScenario.Large,
-        takerAssetAmountScenario: OrderAssetAmountScenario.Large,
-        makerFeeScenario: OrderAssetAmountScenario.Large,
-        takerFeeScenario: OrderAssetAmountScenario.Large,
-        expirationTimeSecondsScenario: ExpirationTimeSecondsScenario.InFuture,
-        makerAssetDataScenario: AssetDataScenario.ERC20NonZRXEighteenDecimals,
-        takerAssetDataScenario: AssetDataScenario.ERC20NonZRXEighteenDecimals,
-    },
-    takerAssetFillAmountScenario: TakerAssetFillAmountScenario.LessThanRemainingFillableTakerAssetAmount,
-    makerStateScenario: {
-        traderAssetBalance: BalanceAmountScenario.Higher,
-        traderAssetAllowance: AllowanceAmountScenario.Higher,
-        zrxFeeBalance: BalanceAmountScenario.Higher,
-        zrxFeeAllowance: AllowanceAmountScenario.Higher,
-    },
-    takerStateScenario: {
-        traderAssetBalance: BalanceAmountScenario.Higher,
-        traderAssetAllowance: AllowanceAmountScenario.Higher,
-        zrxFeeBalance: BalanceAmountScenario.Higher,
-        zrxFeeAllowance: AllowanceAmountScenario.Higher,
-    },
-};
-
-describe('FillOrder Tests', () => {
-    let fillOrderCombinatorialUtils: FillOrderCombinatorialUtils;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-        fillOrderCombinatorialUtils = await fillOrderCombinatorialUtilsFactoryAsync(web3Wrapper, txDefaults);
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('fillOrder', () => {
-        const test = (fillScenarios: FillScenario[]) => {
-            _.forEach(fillScenarios, fillScenario => {
-                const description = `Combinatorial OrderFill: ${JSON.stringify(fillScenario)}`;
-                it(description, async () => {
-                    await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-                });
-            });
-        };
-
-        const allFillScenarios = FillOrderCombinatorialUtils.generateFillOrderCombinations();
-        describe('Combinatorially generated fills orders', () => test(allFillScenarios));
-
-        it('should transfer the correct amounts when makerAssetAmount === takerAssetAmount', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should transfer the correct amounts when makerAssetAmount > takerAssetAmount', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    takerAssetAmountScenario: OrderAssetAmountScenario.Small,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should transfer the correct amounts when makerAssetAmount < takerAssetAmount', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetAmountScenario: OrderAssetAmountScenario.Small,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should transfer the correct amounts when makerAssetAmount < takerAssetAmount with zero decimals', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetAmountScenario: OrderAssetAmountScenario.Small,
-                    makerAssetDataScenario: AssetDataScenario.ERC20ZeroDecimals,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should transfer the correct amounts when taker is specified and order is claimed by taker', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    takerScenario: TakerScenario.CorrectlySpecified,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should fill remaining value if takerAssetFillAmount > remaining takerAssetAmount', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.GreaterThanRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-        it('should throw when taker is specified and order is claimed by other', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    takerScenario: TakerScenario.IncorrectlySpecified,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if makerAssetAmount is 0', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetAmountScenario: OrderAssetAmountScenario.Zero,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.GreaterThanRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if takerAssetAmount is 0', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    takerAssetAmountScenario: OrderAssetAmountScenario.Zero,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.GreaterThanRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if takerAssetFillAmount is 0', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.Zero,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if an order is expired', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    expirationTimeSecondsScenario: ExpirationTimeSecondsScenario.InPast,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if maker erc20Balances are too low to fill order', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                makerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetBalance: BalanceAmountScenario.TooLow,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if taker erc20Balances are too low to fill order', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                takerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetBalance: BalanceAmountScenario.TooLow,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if maker allowances are too low to fill order', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                makerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetAllowance: AllowanceAmountScenario.TooLow,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should throw if taker allowances are too low to fill order', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                takerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetAllowance: AllowanceAmountScenario.TooLow,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-    });
-
-    describe('Testing exchange of ERC721 Tokens', () => {
-        it('should successfully exchange a single token between the maker and taker (via fillOrder)', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetDataScenario: AssetDataScenario.ERC721,
-                    takerAssetDataScenario: AssetDataScenario.ERC721,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should successfully fill order when makerAsset is ERC721 and takerAsset is ERC20', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetDataScenario: AssetDataScenario.ERC721,
-                    takerAssetDataScenario: AssetDataScenario.ERC20NonZRXEighteenDecimals,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario, true);
-        });
-
-        it('should successfully fill order when makerAsset is ERC20 and takerAsset is ERC721', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetDataScenario: AssetDataScenario.ERC20NonZRXEighteenDecimals,
-                    takerAssetDataScenario: AssetDataScenario.ERC721,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should successfully fill order when makerAsset is ERC721 and approveAll is set for it', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetDataScenario: AssetDataScenario.ERC721,
-                    takerAssetDataScenario: AssetDataScenario.ERC20NonZRXEighteenDecimals,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-                makerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetAllowance: AllowanceAmountScenario.Unlimited,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-
-        it('should successfully fill order when makerAsset and takerAsset are ERC721 and approveAll is set for them', async () => {
-            const fillScenario = {
-                ...defaultFillScenario,
-                orderScenario: {
-                    ...defaultFillScenario.orderScenario,
-                    makerAssetDataScenario: AssetDataScenario.ERC721,
-                    takerAssetDataScenario: AssetDataScenario.ERC721,
-                },
-                takerAssetFillAmountScenario: TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-                makerStateScenario: {
-                    ...defaultFillScenario.makerStateScenario,
-                    traderAssetAllowance: AllowanceAmountScenario.Unlimited,
-                },
-                takerStateScenario: {
-                    ...defaultFillScenario.takerStateScenario,
-                    traderAssetAllowance: AllowanceAmountScenario.Unlimited,
-                },
-            };
-            await fillOrderCombinatorialUtils.testFillOrderScenarioAsync(provider, fillScenario);
-        });
-    });
-});
diff --git a/contracts/core/test/exchange/internal.ts b/contracts/core/test/exchange/internal.ts
deleted file mode 100644
index 972f5efb6..000000000
--- a/contracts/core/test/exchange/internal.ts
+++ /dev/null
@@ -1,472 +0,0 @@
-import {
-    bytes32Values,
-    chaiSetup,
-    constants,
-    FillResults,
-    getRevertReasonOrErrorMessageForSendTransactionAsync,
-    provider,
-    testCombinatoriallyWithReferenceFuncAsync,
-    txDefaults,
-    uint256Values,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { Order, RevertReason, SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { TestExchangeInternalsContract } from '../../generated-wrappers/test_exchange_internals';
-import { artifacts } from '../../src/artifacts';
-
-chaiSetup.configure();
-const expect = chai.expect;
-
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-const MAX_UINT256 = new BigNumber(2).pow(256).minus(1);
-
-const emptyOrder: Order = {
-    senderAddress: constants.NULL_ADDRESS,
-    makerAddress: constants.NULL_ADDRESS,
-    takerAddress: constants.NULL_ADDRESS,
-    makerFee: new BigNumber(0),
-    takerFee: new BigNumber(0),
-    makerAssetAmount: new BigNumber(0),
-    takerAssetAmount: new BigNumber(0),
-    makerAssetData: '0x',
-    takerAssetData: '0x',
-    salt: new BigNumber(0),
-    exchangeAddress: constants.NULL_ADDRESS,
-    feeRecipientAddress: constants.NULL_ADDRESS,
-    expirationTimeSeconds: new BigNumber(0),
-};
-
-const emptySignedOrder: SignedOrder = {
-    ...emptyOrder,
-    signature: '',
-};
-
-const overflowErrorForCall = new Error(RevertReason.Uint256Overflow);
-
-describe('Exchange core internal functions', () => {
-    let testExchange: TestExchangeInternalsContract;
-    let overflowErrorForSendTransaction: Error | undefined;
-    let divisionByZeroErrorForCall: Error | undefined;
-    let roundingErrorForCall: Error | undefined;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        testExchange = await TestExchangeInternalsContract.deployFrom0xArtifactAsync(
-            artifacts.TestExchangeInternals,
-            provider,
-            txDefaults,
-        );
-        overflowErrorForSendTransaction = new Error(
-            await getRevertReasonOrErrorMessageForSendTransactionAsync(RevertReason.Uint256Overflow),
-        );
-        divisionByZeroErrorForCall = new Error(RevertReason.DivisionByZero);
-        roundingErrorForCall = new Error(RevertReason.RoundingError);
-    });
-    // Note(albrow): Don't forget to add beforeEach and afterEach calls to reset
-    // the blockchain state for any tests which modify it!
-
-    async function referenceIsRoundingErrorFloorAsync(
-        numerator: BigNumber,
-        denominator: BigNumber,
-        target: BigNumber,
-    ): Promise<boolean> {
-        if (denominator.eq(0)) {
-            throw divisionByZeroErrorForCall;
-        }
-        if (numerator.eq(0)) {
-            return false;
-        }
-        if (target.eq(0)) {
-            return false;
-        }
-        const product = numerator.mul(target);
-        const remainder = product.mod(denominator);
-        const remainderTimes1000 = remainder.mul('1000');
-        const isError = remainderTimes1000.gte(product);
-        if (product.greaterThan(MAX_UINT256)) {
-            throw overflowErrorForCall;
-        }
-        if (remainderTimes1000.greaterThan(MAX_UINT256)) {
-            throw overflowErrorForCall;
-        }
-        return isError;
-    }
-
-    async function referenceIsRoundingErrorCeilAsync(
-        numerator: BigNumber,
-        denominator: BigNumber,
-        target: BigNumber,
-    ): Promise<boolean> {
-        if (denominator.eq(0)) {
-            throw divisionByZeroErrorForCall;
-        }
-        if (numerator.eq(0)) {
-            return false;
-        }
-        if (target.eq(0)) {
-            return false;
-        }
-        const product = numerator.mul(target);
-        const remainder = product.mod(denominator);
-        const error = denominator.sub(remainder).mod(denominator);
-        const errorTimes1000 = error.mul('1000');
-        const isError = errorTimes1000.gte(product);
-        if (product.greaterThan(MAX_UINT256)) {
-            throw overflowErrorForCall;
-        }
-        if (errorTimes1000.greaterThan(MAX_UINT256)) {
-            throw overflowErrorForCall;
-        }
-        return isError;
-    }
-
-    async function referenceSafeGetPartialAmountFloorAsync(
-        numerator: BigNumber,
-        denominator: BigNumber,
-        target: BigNumber,
-    ): Promise<BigNumber> {
-        if (denominator.eq(0)) {
-            throw divisionByZeroErrorForCall;
-        }
-        const isRoundingError = await referenceIsRoundingErrorFloorAsync(numerator, denominator, target);
-        if (isRoundingError) {
-            throw roundingErrorForCall;
-        }
-        const product = numerator.mul(target);
-        if (product.greaterThan(MAX_UINT256)) {
-            throw overflowErrorForCall;
-        }
-        return product.dividedToIntegerBy(denominator);
-    }
-
-    describe('addFillResults', async () => {
-        function makeFillResults(value: BigNumber): FillResults {
-            return {
-                makerAssetFilledAmount: value,
-                takerAssetFilledAmount: value,
-                makerFeePaid: value,
-                takerFeePaid: value,
-            };
-        }
-        async function referenceAddFillResultsAsync(
-            totalValue: BigNumber,
-            singleValue: BigNumber,
-        ): Promise<FillResults> {
-            // Note(albrow): Here, each of totalFillResults and
-            // singleFillResults will consist of fields with the same values.
-            // This should be safe because none of the fields in a given
-            // FillResults are ever used together in a mathemetical operation.
-            // They are only used with the corresponding field from *the other*
-            // FillResults, which are different.
-            const totalFillResults = makeFillResults(totalValue);
-            const singleFillResults = makeFillResults(singleValue);
-            // HACK(albrow): _.mergeWith mutates the first argument! To
-            // workaround this we use _.cloneDeep.
-            return _.mergeWith(
-                _.cloneDeep(totalFillResults),
-                singleFillResults,
-                (totalVal: BigNumber, singleVal: BigNumber) => {
-                    const newTotal = totalVal.add(singleVal);
-                    if (newTotal.greaterThan(MAX_UINT256)) {
-                        throw overflowErrorForCall;
-                    }
-                    return newTotal;
-                },
-            );
-        }
-        async function testAddFillResultsAsync(totalValue: BigNumber, singleValue: BigNumber): Promise<FillResults> {
-            const totalFillResults = makeFillResults(totalValue);
-            const singleFillResults = makeFillResults(singleValue);
-            return testExchange.publicAddFillResults.callAsync(totalFillResults, singleFillResults);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'addFillResults',
-            referenceAddFillResultsAsync,
-            testAddFillResultsAsync,
-            [uint256Values, uint256Values],
-        );
-    });
-
-    describe('calculateFillResults', async () => {
-        function makeOrder(
-            makerAssetAmount: BigNumber,
-            takerAssetAmount: BigNumber,
-            makerFee: BigNumber,
-            takerFee: BigNumber,
-        ): Order {
-            return {
-                ...emptyOrder,
-                makerAssetAmount,
-                takerAssetAmount,
-                makerFee,
-                takerFee,
-            };
-        }
-        async function referenceCalculateFillResultsAsync(
-            orderTakerAssetAmount: BigNumber,
-            takerAssetFilledAmount: BigNumber,
-            otherAmount: BigNumber,
-        ): Promise<FillResults> {
-            // Note(albrow): Here we are re-using the same value (otherAmount)
-            // for order.makerAssetAmount, order.makerFee, and order.takerFee.
-            // This should be safe because they are never used with each other
-            // in any mathematical operation in either the reference TypeScript
-            // implementation or the Solidity implementation of
-            // calculateFillResults.
-            const makerAssetFilledAmount = await referenceSafeGetPartialAmountFloorAsync(
-                takerAssetFilledAmount,
-                orderTakerAssetAmount,
-                otherAmount,
-            );
-            const order = makeOrder(otherAmount, orderTakerAssetAmount, otherAmount, otherAmount);
-            const orderMakerAssetAmount = order.makerAssetAmount;
-            return {
-                makerAssetFilledAmount,
-                takerAssetFilledAmount,
-                makerFeePaid: await referenceSafeGetPartialAmountFloorAsync(
-                    makerAssetFilledAmount,
-                    orderMakerAssetAmount,
-                    otherAmount,
-                ),
-                takerFeePaid: await referenceSafeGetPartialAmountFloorAsync(
-                    takerAssetFilledAmount,
-                    orderTakerAssetAmount,
-                    otherAmount,
-                ),
-            };
-        }
-        async function testCalculateFillResultsAsync(
-            orderTakerAssetAmount: BigNumber,
-            takerAssetFilledAmount: BigNumber,
-            otherAmount: BigNumber,
-        ): Promise<FillResults> {
-            const order = makeOrder(otherAmount, orderTakerAssetAmount, otherAmount, otherAmount);
-            return testExchange.publicCalculateFillResults.callAsync(order, takerAssetFilledAmount);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'calculateFillResults',
-            referenceCalculateFillResultsAsync,
-            testCalculateFillResultsAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('getPartialAmountFloor', async () => {
-        async function referenceGetPartialAmountFloorAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            if (denominator.eq(0)) {
-                throw divisionByZeroErrorForCall;
-            }
-            const product = numerator.mul(target);
-            if (product.greaterThan(MAX_UINT256)) {
-                throw overflowErrorForCall;
-            }
-            return product.dividedToIntegerBy(denominator);
-        }
-        async function testGetPartialAmountFloorAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            return testExchange.publicGetPartialAmountFloor.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'getPartialAmountFloor',
-            referenceGetPartialAmountFloorAsync,
-            testGetPartialAmountFloorAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('getPartialAmountCeil', async () => {
-        async function referenceGetPartialAmountCeilAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            if (denominator.eq(0)) {
-                throw divisionByZeroErrorForCall;
-            }
-            const product = numerator.mul(target);
-            const offset = product.add(denominator.sub(1));
-            if (offset.greaterThan(MAX_UINT256)) {
-                throw overflowErrorForCall;
-            }
-            const result = offset.dividedToIntegerBy(denominator);
-            if (product.mod(denominator).eq(0)) {
-                expect(result.mul(denominator)).to.be.bignumber.eq(product);
-            } else {
-                expect(result.mul(denominator)).to.be.bignumber.gt(product);
-            }
-            return result;
-        }
-        async function testGetPartialAmountCeilAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            return testExchange.publicGetPartialAmountCeil.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'getPartialAmountCeil',
-            referenceGetPartialAmountCeilAsync,
-            testGetPartialAmountCeilAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('safeGetPartialAmountFloor', async () => {
-        async function testSafeGetPartialAmountFloorAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            return testExchange.publicSafeGetPartialAmountFloor.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'safeGetPartialAmountFloor',
-            referenceSafeGetPartialAmountFloorAsync,
-            testSafeGetPartialAmountFloorAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('safeGetPartialAmountCeil', async () => {
-        async function referenceSafeGetPartialAmountCeilAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            if (denominator.eq(0)) {
-                throw divisionByZeroErrorForCall;
-            }
-            const isRoundingError = await referenceIsRoundingErrorCeilAsync(numerator, denominator, target);
-            if (isRoundingError) {
-                throw roundingErrorForCall;
-            }
-            const product = numerator.mul(target);
-            const offset = product.add(denominator.sub(1));
-            if (offset.greaterThan(MAX_UINT256)) {
-                throw overflowErrorForCall;
-            }
-            const result = offset.dividedToIntegerBy(denominator);
-            if (product.mod(denominator).eq(0)) {
-                expect(result.mul(denominator)).to.be.bignumber.eq(product);
-            } else {
-                expect(result.mul(denominator)).to.be.bignumber.gt(product);
-            }
-            return result;
-        }
-        async function testSafeGetPartialAmountCeilAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<BigNumber> {
-            return testExchange.publicSafeGetPartialAmountCeil.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'safeGetPartialAmountCeil',
-            referenceSafeGetPartialAmountCeilAsync,
-            testSafeGetPartialAmountCeilAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('isRoundingErrorFloor', async () => {
-        async function testIsRoundingErrorFloorAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<boolean> {
-            return testExchange.publicIsRoundingErrorFloor.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'isRoundingErrorFloor',
-            referenceIsRoundingErrorFloorAsync,
-            testIsRoundingErrorFloorAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('isRoundingErrorCeil', async () => {
-        async function testIsRoundingErrorCeilAsync(
-            numerator: BigNumber,
-            denominator: BigNumber,
-            target: BigNumber,
-        ): Promise<boolean> {
-            return testExchange.publicIsRoundingErrorCeil.callAsync(numerator, denominator, target);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'isRoundingErrorCeil',
-            referenceIsRoundingErrorCeilAsync,
-            testIsRoundingErrorCeilAsync,
-            [uint256Values, uint256Values, uint256Values],
-        );
-    });
-
-    describe('updateFilledState', async () => {
-        // Note(albrow): Since updateFilledState modifies the state by calling
-        // sendTransaction, we must reset the state after each test.
-        beforeEach(async () => {
-            await blockchainLifecycle.startAsync();
-        });
-        afterEach(async () => {
-            await blockchainLifecycle.revertAsync();
-        });
-        async function referenceUpdateFilledStateAsync(
-            takerAssetFilledAmount: BigNumber,
-            orderTakerAssetFilledAmount: BigNumber,
-            // tslint:disable-next-line:no-unused-variable
-            orderHash: string,
-        ): Promise<BigNumber> {
-            const totalFilledAmount = takerAssetFilledAmount.add(orderTakerAssetFilledAmount);
-            if (totalFilledAmount.greaterThan(MAX_UINT256)) {
-                throw overflowErrorForSendTransaction;
-            }
-            return totalFilledAmount;
-        }
-        async function testUpdateFilledStateAsync(
-            takerAssetFilledAmount: BigNumber,
-            orderTakerAssetFilledAmount: BigNumber,
-            orderHash: string,
-        ): Promise<BigNumber> {
-            const fillResults = {
-                makerAssetFilledAmount: new BigNumber(0),
-                takerAssetFilledAmount,
-                makerFeePaid: new BigNumber(0),
-                takerFeePaid: new BigNumber(0),
-            };
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await testExchange.publicUpdateFilledState.sendTransactionAsync(
-                    emptySignedOrder,
-                    constants.NULL_ADDRESS,
-                    orderHash,
-                    orderTakerAssetFilledAmount,
-                    fillResults,
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            return testExchange.filled.callAsync(orderHash);
-        }
-        await testCombinatoriallyWithReferenceFuncAsync(
-            'updateFilledState',
-            referenceUpdateFilledStateAsync,
-            testUpdateFilledStateAsync,
-            [uint256Values, uint256Values, bytes32Values],
-        );
-    });
-});
diff --git a/contracts/core/test/exchange/match_orders.ts b/contracts/core/test/exchange/match_orders.ts
deleted file mode 100644
index 8e943c237..000000000
--- a/contracts/core/test/exchange/match_orders.ts
+++ /dev/null
@@ -1,1284 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    ERC20BalancesByOwner,
-    ERC721TokenIdsByOwner,
-    expectTransactionFailedAsync,
-    OrderFactory,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import {
-    artifacts as tokensArtifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ReentrantERC20TokenContract,
-} from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils } from '@0x/order-utils';
-import { RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { ExchangeContract } from '../../generated-wrappers/exchange';
-import { TestExchangeInternalsContract } from '../../generated-wrappers/test_exchange_internals';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
-import { MatchOrderTester } from '../utils/match_order_tester';
-
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-chaiSetup.configure();
-const expect = chai.expect;
-
-describe('matchOrders', () => {
-    let makerAddressLeft: string;
-    let makerAddressRight: string;
-    let owner: string;
-    let takerAddress: string;
-    let feeRecipientAddressLeft: string;
-    let feeRecipientAddressRight: string;
-
-    let erc20TokenA: DummyERC20TokenContract;
-    let erc20TokenB: DummyERC20TokenContract;
-    let zrxToken: DummyERC20TokenContract;
-    let erc721Token: DummyERC721TokenContract;
-    let reentrantErc20Token: ReentrantERC20TokenContract;
-    let exchange: ExchangeContract;
-    let erc20Proxy: ERC20ProxyContract;
-    let erc721Proxy: ERC721ProxyContract;
-
-    let erc20BalancesByOwner: ERC20BalancesByOwner;
-    let erc721TokenIdsByOwner: ERC721TokenIdsByOwner;
-    let exchangeWrapper: ExchangeWrapper;
-    let erc20Wrapper: ERC20Wrapper;
-    let erc721Wrapper: ERC721Wrapper;
-    let orderFactoryLeft: OrderFactory;
-    let orderFactoryRight: OrderFactory;
-
-    let erc721LeftMakerAssetIds: BigNumber[];
-    let erc721RightMakerAssetIds: BigNumber[];
-
-    let defaultERC20MakerAssetAddress: string;
-    let defaultERC20TakerAssetAddress: string;
-    let defaultERC721AssetAddress: string;
-
-    let matchOrderTester: MatchOrderTester;
-
-    let testExchange: TestExchangeInternalsContract;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        // Create accounts
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        // Hack(albrow): Both Prettier and TSLint insert a trailing comma below
-        // but that is invalid syntax as of TypeScript version >= 2.8. We don't
-        // have the right fine-grained configuration options in TSLint,
-        // Prettier, or TypeScript, to reconcile this, so we will just have to
-        // wait for them to sort it out. We disable TSLint and Prettier for
-        // this part of the code for now. This occurs several times in this
-        // file. See https://github.com/prettier/prettier/issues/4624.
-        // prettier-ignore
-        const usedAddresses = ([
-            owner,
-            makerAddressLeft,
-            makerAddressRight,
-            takerAddress,
-            feeRecipientAddressLeft,
-            // tslint:disable-next-line:trailing-comma
-            feeRecipientAddressRight
-        ] = _.slice(accounts, 0, 6));
-        // Create wrappers
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-        erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
-        // Deploy ERC20 token & ERC20 proxy
-        const numDummyErc20ToDeploy = 3;
-        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
-            numDummyErc20ToDeploy,
-            constants.DUMMY_TOKEN_DECIMALS,
-        );
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-        // Deploy ERC721 token and proxy
-        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721LeftMakerAssetIds = erc721Balances[makerAddressLeft][erc721Token.address];
-        erc721RightMakerAssetIds = erc721Balances[makerAddressRight][erc721Token.address];
-        // Depoy exchange
-        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
-            provider,
-            txDefaults,
-            assetDataUtils.encodeERC20AssetData(zrxToken.address),
-        );
-        exchangeWrapper = new ExchangeWrapper(exchange, provider);
-        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
-        await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, owner);
-        // Authorize ERC20 and ERC721 trades by exchange
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        reentrantErc20Token = await ReentrantERC20TokenContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.ReentrantERC20Token,
-            provider,
-            txDefaults,
-            exchange.address,
-        );
-
-        // Set default addresses
-        defaultERC20MakerAssetAddress = erc20TokenA.address;
-        defaultERC20TakerAssetAddress = erc20TokenB.address;
-        defaultERC721AssetAddress = erc721Token.address;
-        // Create default order parameters
-        const defaultOrderParamsLeft = {
-            ...constants.STATIC_ORDER_PARAMS,
-            makerAddress: makerAddressLeft,
-            exchangeAddress: exchange.address,
-            makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-            feeRecipientAddress: feeRecipientAddressLeft,
-        };
-        const defaultOrderParamsRight = {
-            ...constants.STATIC_ORDER_PARAMS,
-            makerAddress: makerAddressRight,
-            exchangeAddress: exchange.address,
-            makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-            feeRecipientAddress: feeRecipientAddressRight,
-        };
-        const privateKeyLeft = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddressLeft)];
-        orderFactoryLeft = new OrderFactory(privateKeyLeft, defaultOrderParamsLeft);
-        const privateKeyRight = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddressRight)];
-        orderFactoryRight = new OrderFactory(privateKeyRight, defaultOrderParamsRight);
-        // Set match order tester
-        matchOrderTester = new MatchOrderTester(exchangeWrapper, erc20Wrapper, erc721Wrapper, zrxToken.address);
-        testExchange = await TestExchangeInternalsContract.deployFrom0xArtifactAsync(
-            artifacts.TestExchangeInternals,
-            provider,
-            txDefaults,
-        );
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('matchOrders', () => {
-        beforeEach(async () => {
-            erc20BalancesByOwner = await erc20Wrapper.getBalancesAsync();
-            erc721TokenIdsByOwner = await erc721Wrapper.getBalancesAsync();
-        });
-
-        it('Should transfer correct amounts when right order is fully filled and values pass isRoundingErrorFloor but fail isRoundingErrorCeil', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(17), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(98), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(75), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            // Assert is rounding error ceil & not rounding error floor
-            // These assertions are taken from MixinMatchOrders::calculateMatchedFillResults
-            // The rounding error is derived computating how much the left maker will sell.
-            const numerator = signedOrderLeft.makerAssetAmount;
-            const denominator = signedOrderLeft.takerAssetAmount;
-            const target = signedOrderRight.makerAssetAmount;
-            const isRoundingErrorCeil = await testExchange.publicIsRoundingErrorCeil.callAsync(
-                numerator,
-                denominator,
-                target,
-            );
-            expect(isRoundingErrorCeil).to.be.true();
-            const isRoundingErrorFloor = await testExchange.publicIsRoundingErrorFloor.callAsync(
-                numerator,
-                denominator,
-                target,
-            );
-            expect(isRoundingErrorFloor).to.be.false();
-            // Match signedOrderLeft with signedOrderRight
-            // Note that the left maker received a slightly better sell price.
-            // This is intentional; see note in MixinMatchOrders.calculateMatchedFillResults.
-            // Because the left maker received a slightly more favorable sell price, the fee
-            // paid by the left taker is slightly higher than that paid by the left maker.
-            // Fees can be thought of as a tax paid by the seller, derived from the sale price.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(75), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber('76.4705882352941176'), 16), // 76.47%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(75), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(0), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber('76.5306122448979591'), 16), // 76.53%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should transfer correct amounts when left order is fully filled and values pass isRoundingErrorCeil but fail isRoundingErrorFloor', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(15), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(97), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(14), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            // Assert is rounding error floor & not rounding error ceil
-            // These assertions are taken from MixinMatchOrders::calculateMatchedFillResults
-            // The rounding error is derived computating how much the right maker will buy.
-            const numerator = signedOrderRight.takerAssetAmount;
-            const denominator = signedOrderRight.makerAssetAmount;
-            const target = signedOrderLeft.takerAssetAmount;
-            const isRoundingErrorFloor = await testExchange.publicIsRoundingErrorFloor.callAsync(
-                numerator,
-                denominator,
-                target,
-            );
-            expect(isRoundingErrorFloor).to.be.true();
-            const isRoundingErrorCeil = await testExchange.publicIsRoundingErrorCeil.callAsync(
-                numerator,
-                denominator,
-                target,
-            );
-            expect(isRoundingErrorCeil).to.be.false();
-            // Match signedOrderLeft with signedOrderRight
-            // Note that the right maker received a slightly better purchase price.
-            // This is intentional; see note in MixinMatchOrders.calculateMatchedFillResults.
-            // Because the right maker received a slightly more favorable buy price, the fee
-            // paid by the right taker is slightly higher than that paid by the right maker.
-            // Fees can be thought of as a tax paid by the seller, derived from the sale price.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(15), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber('92.7835051546391752'), 16), // 92.78%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber('92.8571428571428571'), 16), // 92.85%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should give right maker a better buy price when rounding', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(16), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(83), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(49), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            // Note:
-            // The correct price buy price for the right maker would yield (49/83) * 22 = 12.988 units
-            // of the left maker asset. This gets rounded up to 13, giving the right maker a better price.
-            // Note:
-            //  The maker/taker fee percentage paid on the right order differs because
-            //  they received different sale prices. The right maker pays a
-            //  fee slightly lower than the right taker.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(16), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber('26.5060240963855421'), 16), // 26.506%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber('26.5306122448979591'), 16), // 26.531%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should give left maker a better sell price when rounding', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(12), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(97), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            // Note:
-            //  The maker/taker fee percentage paid on the left order differs because
-            //  they received different sale prices. The left maker pays a fee
-            //  slightly lower than the left taker.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(11), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber('91.6666666666666666'), 16), // 91.6%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber('91.7525773195876288'), 16), // 91.75%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should give right maker and right taker a favorable fee price when rounding', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(16), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(83), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(49), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-                makerFee: Web3Wrapper.toBaseUnitAmount(new BigNumber(10000), 0),
-                takerFee: Web3Wrapper.toBaseUnitAmount(new BigNumber(10000), 0),
-            });
-            // Note:
-            //  The maker/taker fee percentage paid on the right order differs because
-            //  they received different sale prices. The right maker pays a
-            //  fee slightly lower than the right taker.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(16), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(22), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(13), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2650), 0), // 2650.6 rounded down tro 2650
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(2653), 0), // 2653.1 rounded down to 2653
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should give left maker and left taker a favorable fee price when rounding', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(12), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(97), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-                makerFee: Web3Wrapper.toBaseUnitAmount(new BigNumber(10000), 0),
-                takerFee: Web3Wrapper.toBaseUnitAmount(new BigNumber(10000), 0),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            // Note:
-            //  The maker/taker fee percentage paid on the left order differs because
-            //  they received different sale prices. The left maker pays a
-            //  fee slightly lower than the left taker.
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(11), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(9166), 0), // 9166.6 rounded down to 9166
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(89), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(9175), 0), // 9175.2 rounded down to 9175
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should transfer correct amounts when right order fill amount deviates from amount derived by `Exchange.fillOrder`', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAddress: makerAddressLeft,
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1000), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1005), 0),
-                feeRecipientAddress: feeRecipientAddressLeft,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAddress: makerAddressRight,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2126), 0),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1063), 0),
-                feeRecipientAddress: feeRecipientAddressRight,
-            });
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1000), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1005), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                // Notes:
-                //  i.
-                //    The left order is fully filled by the right order, so the right maker must sell 1005 units of their asset to the left maker.
-                //    By selling 1005 units, the right maker should theoretically receive 502.5 units of the left maker's asset.
-                //    Since the transfer amount must be an integer, this value must be rounded down to 502 or up to 503.
-                //  ii.
-                //    If the right order were filled via `Exchange.fillOrder` the respective fill amounts would be [1004, 502] or [1006, 503].
-                //    It follows that we cannot trigger a sale of 1005 units of the right maker's asset through `Exchange.fillOrder`.
-                //  iii.
-                //    For an optimal match, the algorithm must choose either [1005, 502] or [1005, 503] as fill amounts for the right order.
-                //    The algorithm favors the right maker when the exchange rate must be rounded, so the final fill for the right order is [1005, 503].
-                //  iv.
-                //    The right maker fee differs from the right taker fee because their exchange rate differs.
-                //    The right maker always receives the better exchange and fee price.
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1005), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(503), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber('47.2718720602069614'), 16), // 47.27%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(497), 0),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber('47.3189087488240827'), 16), // 47.31%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        const reentrancyTest = (functionNames: string[]) => {
-            _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                const description = `should not allow matchOrders to reenter the Exchange contract via ${functionName}`;
-                it(description, async () => {
-                    const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                        takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                    });
-                    const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                        makerAddress: makerAddressRight,
-                        takerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                        takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                        feeRecipientAddress: feeRecipientAddressRight,
-                    });
-                    await web3Wrapper.awaitTransactionSuccessAsync(
-                        await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                        constants.AWAIT_TRANSACTION_MINED_MS,
-                    );
-                    await expectTransactionFailedAsync(
-                        exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                        RevertReason.TransferFailed,
-                    );
-                });
-            });
-        };
-        describe('matchOrders reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-        it('should transfer the correct amounts when orders completely fill each other', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match signedOrderLeft with signedOrderRight
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts when orders completely fill each other and taker doesnt take a profit', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-            });
-            // Match signedOrderLeft with signedOrderRight
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(0), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts when left order is completely filled and right order is partially filled', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(20), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(4), 18),
-            });
-            // Match signedOrderLeft with signedOrderRight
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 16), // 50%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 16), // 50%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts when right order is completely filled and left order is partially filled', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match signedOrderLeft with signedOrderRight
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 16), // 10%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 16), // 10%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            // Match signedOrderLeft with signedOrderRight
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts when consecutive calls are used to completely fill the left order', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            let newERC20BalancesByOwner: ERC20BalancesByOwner;
-            let newERC721TokenIdsByOwner: ERC721TokenIdsByOwner;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 16), // 10%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 16), // 10%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            // prettier-ignore
-            [
-                newERC20BalancesByOwner,
-                // tslint:disable-next-line:trailing-comma
-                newERC721TokenIdsByOwner
-            ] = await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-            // Construct second right order
-            // Note: This order needs makerAssetAmount=90/takerAssetAmount=[anything <= 45] to fully fill the right order.
-            //       However, we use 100/50 to ensure a partial fill as we want to go down the "left fill"
-            //       branch in the contract twice for this test.
-            const signedOrderRight2 = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 18),
-            });
-            // Match signedOrderLeft with signedOrderRight2
-            const leftTakerAssetFilledAmount = signedOrderRight.makerAssetAmount;
-            const rightTakerAssetFilledAmount = new BigNumber(0);
-            const expectedTransferAmounts2 = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(45), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 16), // 90% (10% paid earlier)
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(45), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 16), // 90%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(0), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 16), // 90% (10% paid earlier)
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(90), 16), // 90%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight2,
-                takerAddress,
-                newERC20BalancesByOwner,
-                newERC721TokenIdsByOwner,
-                expectedTransferAmounts2,
-                leftTakerAssetFilledAmount,
-                rightTakerAssetFilledAmount,
-            );
-        });
-
-        it('should transfer the correct amounts when consecutive calls are used to completely fill the right order', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-            // Match orders
-            let newERC20BalancesByOwner: ERC20BalancesByOwner;
-            let newERC721TokenIdsByOwner: ERC721TokenIdsByOwner;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(4), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(4), 16), // 4%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(6), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(4), 16), // 4%
-            };
-            // prettier-ignore
-            [
-                newERC20BalancesByOwner,
-                // tslint:disable-next-line:trailing-comma
-                newERC721TokenIdsByOwner
-            ] = await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-
-            // Create second left order
-            // Note: This order needs makerAssetAmount=96/takerAssetAmount=48 to fully fill the right order.
-            //       However, we use 100/50 to ensure a partial fill as we want to go down the "right fill"
-            //       branch in the contract twice for this test.
-            const signedOrderLeft2 = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(50), 18),
-            });
-            // Match signedOrderLeft2 with signedOrderRight
-            const leftTakerAssetFilledAmount = new BigNumber(0);
-            const takerAmountReceived = newERC20BalancesByOwner[takerAddress][defaultERC20MakerAssetAddress].minus(
-                erc20BalancesByOwner[takerAddress][defaultERC20MakerAssetAddress],
-            );
-            const rightTakerAssetFilledAmount = signedOrderLeft.makerAssetAmount.minus(takerAmountReceived);
-            const expectedTransferAmounts2 = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(48), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 16), // 96%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(48), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 16), // 96%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(0), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 16), // 96%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(96), 16), // 96%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft2,
-                signedOrderRight,
-                takerAddress,
-                newERC20BalancesByOwner,
-                newERC721TokenIdsByOwner,
-                expectedTransferAmounts2,
-                leftTakerAssetFilledAmount,
-                rightTakerAssetFilledAmount,
-            );
-        });
-
-        it('should transfer the correct amounts if fee recipient is the same across both matched orders', async () => {
-            const feeRecipientAddress = feeRecipientAddressLeft;
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feeRecipientAddress,
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feeRecipientAddress,
-            });
-            // Match orders
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts if taker is also the left order maker', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            takerAddress = signedOrderLeft.makerAddress;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts if taker is also the right order maker', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            takerAddress = signedOrderRight.makerAddress;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts if taker is also the left fee recipient', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            takerAddress = feeRecipientAddressLeft;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts if taker is also the right fee recipient', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            takerAddress = feeRecipientAddressRight;
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer the correct amounts if left maker is the left fee recipient and right maker is the right fee recipient', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(3), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('Should throw if left order is not fillable', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Cancel left order
-            await exchangeWrapper.cancelOrderAsync(signedOrderLeft, signedOrderLeft.makerAddress);
-            // Match orders
-            return expectTransactionFailedAsync(
-                exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('Should throw if right order is not fillable', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Cancel right order
-            await exchangeWrapper.cancelOrderAsync(signedOrderRight, signedOrderRight.makerAddress);
-            // Match orders
-            return expectTransactionFailedAsync(
-                exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should throw if there is not a positive spread', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(200), 18),
-            });
-            // Match orders
-            return expectTransactionFailedAsync(
-                exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                RevertReason.NegativeSpreadRequired,
-            );
-        });
-
-        it('should throw if the left maker asset is not equal to the right taker asset ', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20TakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            return expectTransactionFailedAsync(
-                exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                // We are assuming assetData fields of the right order are the
-                // reverse of the left order, rather than checking equality. This
-                // saves a bunch of gas, but as a result if the assetData fields are
-                // off then the failure ends up happening at signature validation
-                RevertReason.InvalidOrderSignature,
-            );
-        });
-
-        it('should throw if the right maker asset is not equal to the left taker asset', async () => {
-            // Create orders to match
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultERC20MakerAssetAddress),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(5), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-            });
-            // Match orders
-            return expectTransactionFailedAsync(
-                exchangeWrapper.matchOrdersAsync(signedOrderLeft, signedOrderRight, takerAddress),
-                RevertReason.InvalidOrderSignature,
-            );
-        });
-
-        it('should transfer correct amounts when left order maker asset is an ERC721 token', async () => {
-            // Create orders to match
-            const erc721TokenToTransfer = erc721LeftMakerAssetIds[0];
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                makerAssetData: assetDataUtils.encodeERC721AssetData(defaultERC721AssetAddress, erc721TokenToTransfer),
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                takerAssetData: assetDataUtils.encodeERC721AssetData(defaultERC721AssetAddress, erc721TokenToTransfer),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: new BigNumber(1),
-            });
-            // Match orders
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(0), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 50%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-
-        it('should transfer correct amounts when right order maker asset is an ERC721 token', async () => {
-            // Create orders to match
-            const erc721TokenToTransfer = erc721RightMakerAssetIds[0];
-            const signedOrderLeft = await orderFactoryLeft.newSignedOrderAsync({
-                takerAssetData: assetDataUtils.encodeERC721AssetData(defaultERC721AssetAddress, erc721TokenToTransfer),
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                takerAssetAmount: new BigNumber(1),
-            });
-            const signedOrderRight = await orderFactoryRight.newSignedOrderAsync({
-                makerAssetData: assetDataUtils.encodeERC721AssetData(defaultERC721AssetAddress, erc721TokenToTransfer),
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(8), 18),
-            });
-            // Match orders
-            const expectedTransferAmounts = {
-                // Left Maker
-                amountSoldByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(10), 18),
-                amountBoughtByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                feePaidByLeftMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Right Maker
-                amountSoldByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(1), 0),
-                amountBoughtByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(8), 18),
-                feePaidByRightMaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                // Taker
-                amountReceivedByTaker: Web3Wrapper.toBaseUnitAmount(new BigNumber(2), 18),
-                feePaidByTakerLeft: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-                feePaidByTakerRight: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 16), // 100%
-            };
-            await matchOrderTester.matchOrdersAndAssertEffectsAsync(
-                signedOrderLeft,
-                signedOrderRight,
-                takerAddress,
-                erc20BalancesByOwner,
-                erc721TokenIdsByOwner,
-                expectedTransferAmounts,
-            );
-        });
-    });
-}); // tslint:disable-line:max-file-line-count
diff --git a/contracts/core/test/exchange/signature_validator.ts b/contracts/core/test/exchange/signature_validator.ts
deleted file mode 100644
index 62579cdc7..000000000
--- a/contracts/core/test/exchange/signature_validator.ts
+++ /dev/null
@@ -1,526 +0,0 @@
-import { artifacts as examplesArtifacts, ValidatorContract, WalletContract } from '@0x/contracts-examples';
-import {
-    addressUtils,
-    chaiSetup,
-    constants,
-    expectContractCallFailedAsync,
-    LogDecoder,
-    OrderFactory,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { artifacts as tokensArtifacts } from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils, orderHashUtils, signatureUtils } from '@0x/order-utils';
-import { RevertReason, SignatureType, SignedOrder } from '@0x/types';
-import * as chai from 'chai';
-import { LogWithDecodedArgs } from 'ethereum-types';
-import ethUtil = require('ethereumjs-util');
-
-import {
-    artifacts,
-    TestSignatureValidatorContract,
-    TestSignatureValidatorSignatureValidatorApprovalEventArgs,
-    TestStaticCallReceiverContract,
-} from '../../src';
-
-chaiSetup.configure();
-const expect = chai.expect;
-
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-// tslint:disable:no-unnecessary-type-assertion
-describe('MixinSignatureValidator', () => {
-    let signedOrder: SignedOrder;
-    let orderFactory: OrderFactory;
-    let signatureValidator: TestSignatureValidatorContract;
-    let testWallet: WalletContract;
-    let testValidator: ValidatorContract;
-    let maliciousWallet: TestStaticCallReceiverContract;
-    let maliciousValidator: TestStaticCallReceiverContract;
-    let signerAddress: string;
-    let signerPrivateKey: Buffer;
-    let notSignerAddress: string;
-    let notSignerPrivateKey: Buffer;
-    let signatureValidatorLogDecoder: LogDecoder;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const makerAddress = accounts[0];
-        signerAddress = makerAddress;
-        notSignerAddress = accounts[1];
-        signatureValidator = await TestSignatureValidatorContract.deployFrom0xArtifactAsync(
-            artifacts.TestSignatureValidator,
-            provider,
-            txDefaults,
-        );
-        testWallet = await WalletContract.deployFrom0xArtifactAsync(
-            examplesArtifacts.Wallet,
-            provider,
-            txDefaults,
-            signerAddress,
-        );
-        testValidator = await ValidatorContract.deployFrom0xArtifactAsync(
-            examplesArtifacts.Validator,
-            provider,
-            txDefaults,
-            signerAddress,
-        );
-        maliciousWallet = maliciousValidator = await TestStaticCallReceiverContract.deployFrom0xArtifactAsync(
-            artifacts.TestStaticCallReceiver,
-            provider,
-            txDefaults,
-        );
-        signatureValidatorLogDecoder = new LogDecoder(web3Wrapper, { ...artifacts, ...tokensArtifacts });
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(testValidator.address, true, {
-                from: signerAddress,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(
-                maliciousValidator.address,
-                true,
-                {
-                    from: signerAddress,
-                },
-            ),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        const defaultOrderParams = {
-            ...constants.STATIC_ORDER_PARAMS,
-            exchangeAddress: signatureValidator.address,
-            makerAddress,
-            feeRecipientAddress: addressUtils.generatePseudoRandomAddress(),
-            makerAssetData: assetDataUtils.encodeERC20AssetData(addressUtils.generatePseudoRandomAddress()),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(addressUtils.generatePseudoRandomAddress()),
-        };
-        signerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
-        notSignerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(notSignerAddress)];
-        orderFactory = new OrderFactory(signerPrivateKey, defaultOrderParams);
-    });
-
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-
-    describe('isValidSignature', () => {
-        beforeEach(async () => {
-            signedOrder = await orderFactory.newSignedOrderAsync();
-        });
-
-        it('should revert when signature is empty', async () => {
-            const emptySignature = '0x';
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            return expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(
-                    orderHashHex,
-                    signedOrder.makerAddress,
-                    emptySignature,
-                ),
-                RevertReason.LengthGreaterThan0Required,
-            );
-        });
-
-        it('should revert when signature type is unsupported', async () => {
-            const unsupportedSignatureType = SignatureType.NSignatureTypes;
-            const unsupportedSignatureHex = '0x' + Buffer.from([unsupportedSignatureType]).toString('hex');
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            return expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(
-                    orderHashHex,
-                    signedOrder.makerAddress,
-                    unsupportedSignatureHex,
-                ),
-                RevertReason.SignatureUnsupported,
-            );
-        });
-
-        it('should revert when SignatureType=Illegal', async () => {
-            const unsupportedSignatureHex = '0x' + Buffer.from([SignatureType.Illegal]).toString('hex');
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            return expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(
-                    orderHashHex,
-                    signedOrder.makerAddress,
-                    unsupportedSignatureHex,
-                ),
-                RevertReason.SignatureIllegal,
-            );
-        });
-
-        it('should return false when SignatureType=Invalid and signature has a length of zero', async () => {
-            const signatureHex = '0x' + Buffer.from([SignatureType.Invalid]).toString('hex');
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signedOrder.makerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should revert when SignatureType=Invalid and signature length is non-zero', async () => {
-            const fillerData = ethUtil.toBuffer('0xdeadbeef');
-            const signatureType = ethUtil.toBuffer(`0x${SignatureType.Invalid}`);
-            const signatureBuffer = Buffer.concat([fillerData, signatureType]);
-            const signatureHex = ethUtil.bufferToHex(signatureBuffer);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            return expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(
-                    orderHashHex,
-                    signedOrder.makerAddress,
-                    signatureHex,
-                ),
-                RevertReason.Length0Required,
-            );
-        });
-
-        it('should return true when SignatureType=EIP712 and signature is valid', async () => {
-            // Create EIP712 signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
-            const ecSignature = ethUtil.ecsign(orderHashBuffer, signerPrivateKey);
-            // Create 0x signature from EIP712 signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.EIP712}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return false when SignatureType=EIP712 and signature is invalid', async () => {
-            // Create EIP712 signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
-            const ecSignature = ethUtil.ecsign(orderHashBuffer, signerPrivateKey);
-            // Create 0x signature from EIP712 signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.EIP712}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature.
-            // This will fail because `signerAddress` signed the message, but we're passing in `notSignerAddress`
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                notSignerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should return true when SignatureType=EthSign and signature is valid', async () => {
-            // Create EthSign signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashWithEthSignPrefixHex = signatureUtils.addSignedMessagePrefix(orderHashHex);
-            const orderHashWithEthSignPrefixBuffer = ethUtil.toBuffer(orderHashWithEthSignPrefixHex);
-            const ecSignature = ethUtil.ecsign(orderHashWithEthSignPrefixBuffer, signerPrivateKey);
-            // Create 0x signature from EthSign signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.EthSign}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return false when SignatureType=EthSign and signature is invalid', async () => {
-            // Create EthSign signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashWithEthSignPrefixHex = signatureUtils.addSignedMessagePrefix(orderHashHex);
-            const orderHashWithEthSignPrefixBuffer = ethUtil.toBuffer(orderHashWithEthSignPrefixHex);
-            const ecSignature = ethUtil.ecsign(orderHashWithEthSignPrefixBuffer, signerPrivateKey);
-            // Create 0x signature from EthSign signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.EthSign}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature.
-            // This will fail because `signerAddress` signed the message, but we're passing in `notSignerAddress`
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                notSignerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should return true when SignatureType=Wallet and signature is valid', async () => {
-            // Create EIP712 signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
-            const ecSignature = ethUtil.ecsign(orderHashBuffer, signerPrivateKey);
-            // Create 0x signature from EIP712 signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.Wallet}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                testWallet.address,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return false when SignatureType=Wallet and signature is invalid', async () => {
-            // Create EIP712 signature using a private key that does not belong to the wallet owner.
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
-            const notWalletOwnerPrivateKey = notSignerPrivateKey;
-            const ecSignature = ethUtil.ecsign(orderHashBuffer, notWalletOwnerPrivateKey);
-            // Create 0x signature from EIP712 signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.Wallet}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            // Validate signature
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                testWallet.address,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should revert when `isValidSignature` attempts to update state and SignatureType=Wallet', async () => {
-            // Create EIP712 signature
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
-            const ecSignature = ethUtil.ecsign(orderHashBuffer, signerPrivateKey);
-            // Create 0x signature from EIP712 signature
-            const signature = Buffer.concat([
-                ethUtil.toBuffer(ecSignature.v),
-                ecSignature.r,
-                ecSignature.s,
-                ethUtil.toBuffer(`0x${SignatureType.Wallet}`),
-            ]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            await expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(
-                    orderHashHex,
-                    maliciousWallet.address,
-                    signatureHex,
-                ),
-                RevertReason.WalletError,
-            );
-        });
-
-        it('should return true when SignatureType=Validator, signature is valid and validator is approved', async () => {
-            const validatorAddress = ethUtil.toBuffer(`${testValidator.address}`);
-            const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`);
-            const signature = Buffer.concat([validatorAddress, signatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return false when SignatureType=Validator, signature is invalid and validator is approved', async () => {
-            const validatorAddress = ethUtil.toBuffer(`${testValidator.address}`);
-            const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`);
-            const signature = Buffer.concat([validatorAddress, signatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            // This will return false because we signed the message with `signerAddress`, but
-            // are validating against `notSignerAddress`
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                notSignerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should revert when `isValidSignature` attempts to update state and SignatureType=Validator', async () => {
-            const validatorAddress = ethUtil.toBuffer(`${maliciousValidator.address}`);
-            const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`);
-            const signature = Buffer.concat([validatorAddress, signatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            await expectContractCallFailedAsync(
-                signatureValidator.publicIsValidSignature.callAsync(orderHashHex, signerAddress, signatureHex),
-                RevertReason.ValidatorError,
-            );
-        });
-        it('should return false when SignatureType=Validator, signature is valid and validator is not approved', async () => {
-            // Set approval of signature validator to false
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(
-                    testValidator.address,
-                    false,
-                    { from: signerAddress },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Validate signature
-            const validatorAddress = ethUtil.toBuffer(`${testValidator.address}`);
-            const signatureType = ethUtil.toBuffer(`0x${SignatureType.Validator}`);
-            const signature = Buffer.concat([validatorAddress, signatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should return true when SignatureType=Presigned and signer has presigned hash', async () => {
-            // Presign hash
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await signatureValidator.preSign.sendTransactionAsync(
-                    orderHashHex,
-                    signedOrder.makerAddress,
-                    signedOrder.signature,
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            // Validate presigned signature
-            const signature = ethUtil.toBuffer(`0x${SignatureType.PreSigned}`);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signedOrder.makerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return false when SignatureType=Presigned and signer has not presigned hash', async () => {
-            const signature = ethUtil.toBuffer(`0x${SignatureType.PreSigned}`);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                signedOrder.makerAddress,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.false();
-        });
-
-        it('should return true when message was signed by a Trezor One (firmware version 1.6.2)', async () => {
-            // messageHash translates to 0x2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b
-            const messageHash = ethUtil.bufferToHex(ethUtil.toBuffer('++++++++++++++++++++++++++++++++'));
-            const signer = '0xc28b145f10f0bcf0fc000e778615f8fd73490bad';
-            const v = ethUtil.toBuffer('0x1c');
-            const r = ethUtil.toBuffer('0x7b888b596ccf87f0bacab0dcb483124973f7420f169b4824d7a12534ac1e9832');
-            const s = ethUtil.toBuffer('0x0c8e14f7edc01459e13965f1da56e0c23ed11e2cca932571eee1292178f90424');
-            const trezorSignatureType = ethUtil.toBuffer(`0x${SignatureType.EthSign}`);
-            const signature = Buffer.concat([v, r, s, trezorSignatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                messageHash,
-                signer,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-
-        it('should return true when message was signed by a Trezor Model T (firmware version 2.0.7)', async () => {
-            // messageHash translates to 0x2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b
-            const messageHash = ethUtil.bufferToHex(ethUtil.toBuffer('++++++++++++++++++++++++++++++++'));
-            const signer = '0x98ce6d9345e8ffa7d99ee0822272fae9d2c0e895';
-            const v = ethUtil.toBuffer('0x1c');
-            const r = ethUtil.toBuffer('0x423b71062c327f0ec4fe199b8da0f34185e59b4c1cb4cc23df86cac4a601fb3f');
-            const s = ethUtil.toBuffer('0x53810d6591b5348b7ee08ee812c874b0fdfb942c9849d59512c90e295221091f');
-            const trezorSignatureType = ethUtil.toBuffer(`0x${SignatureType.EthSign}`);
-            const signature = Buffer.concat([v, r, s, trezorSignatureType]);
-            const signatureHex = ethUtil.bufferToHex(signature);
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                messageHash,
-                signer,
-                signatureHex,
-            );
-            expect(isValidSignature).to.be.true();
-        });
-    });
-
-    describe('setSignatureValidatorApproval', () => {
-        it('should emit a SignatureValidatorApprovalSet with correct args when a validator is approved', async () => {
-            const approval = true;
-            const res = await signatureValidatorLogDecoder.getTxWithDecodedLogsAsync(
-                await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(
-                    testValidator.address,
-                    approval,
-                    {
-                        from: signerAddress,
-                    },
-                ),
-            );
-            expect(res.logs.length).to.equal(1);
-            const log = res.logs[0] as LogWithDecodedArgs<TestSignatureValidatorSignatureValidatorApprovalEventArgs>;
-            const logArgs = log.args;
-            expect(logArgs.signerAddress).to.equal(signerAddress);
-            expect(logArgs.validatorAddress).to.equal(testValidator.address);
-            expect(logArgs.approved).to.equal(approval);
-        });
-        it('should emit a SignatureValidatorApprovalSet with correct args when a validator is disapproved', async () => {
-            const approval = false;
-            const res = await signatureValidatorLogDecoder.getTxWithDecodedLogsAsync(
-                await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(
-                    testValidator.address,
-                    approval,
-                    {
-                        from: signerAddress,
-                    },
-                ),
-            );
-            expect(res.logs.length).to.equal(1);
-            const log = res.logs[0] as LogWithDecodedArgs<TestSignatureValidatorSignatureValidatorApprovalEventArgs>;
-            const logArgs = log.args;
-            expect(logArgs.signerAddress).to.equal(signerAddress);
-            expect(logArgs.validatorAddress).to.equal(testValidator.address);
-            expect(logArgs.approved).to.equal(approval);
-        });
-    });
-});
-// tslint:disable:max-file-line-count
-// tslint:enable:no-unnecessary-type-assertion
diff --git a/contracts/core/test/exchange/transactions.ts b/contracts/core/test/exchange/transactions.ts
deleted file mode 100644
index 746f3cb04..000000000
--- a/contracts/core/test/exchange/transactions.ts
+++ /dev/null
@@ -1,466 +0,0 @@
-import { artifacts as examplesArtifacts, ExchangeWrapperContract, WhitelistContract } from '@0x/contracts-examples';
-import {
-    chaiSetup,
-    constants,
-    ERC20BalancesByOwner,
-    expectTransactionFailedAsync,
-    OrderFactory,
-    orderUtils,
-    provider,
-    SignedTransaction,
-    TransactionFactory,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { DummyERC20TokenContract } from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils, generatePseudoRandomSalt } from '@0x/order-utils';
-import { OrderWithoutExchangeAddress, RevertReason, SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ExchangeContract } from '../../generated-wrappers/exchange';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-describe('Exchange transactions', () => {
-    let senderAddress: string;
-    let owner: string;
-    let makerAddress: string;
-    let takerAddress: string;
-    let feeRecipientAddress: string;
-
-    let erc20TokenA: DummyERC20TokenContract;
-    let erc20TokenB: DummyERC20TokenContract;
-    let zrxToken: DummyERC20TokenContract;
-    let exchange: ExchangeContract;
-    let erc20Proxy: ERC20ProxyContract;
-
-    let erc20Balances: ERC20BalancesByOwner;
-    let signedOrder: SignedOrder;
-    let signedTx: SignedTransaction;
-    let orderWithoutExchangeAddress: OrderWithoutExchangeAddress;
-    let orderFactory: OrderFactory;
-    let makerTransactionFactory: TransactionFactory;
-    let takerTransactionFactory: TransactionFactory;
-    let exchangeWrapper: ExchangeWrapper;
-    let erc20Wrapper: ERC20Wrapper;
-
-    let defaultMakerTokenAddress: string;
-    let defaultTakerTokenAddress: string;
-    let makerPrivateKey: Buffer;
-    let takerPrivateKey: Buffer;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, senderAddress, makerAddress, takerAddress, feeRecipientAddress] = _.slice(
-            accounts,
-            0,
-            5,
-        ));
-
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-
-        const numDummyErc20ToDeploy = 3;
-        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
-            numDummyErc20ToDeploy,
-            constants.DUMMY_TOKEN_DECIMALS,
-        );
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-
-        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
-            provider,
-            txDefaults,
-            assetDataUtils.encodeERC20AssetData(zrxToken.address),
-        );
-        exchangeWrapper = new ExchangeWrapper(exchange, provider);
-        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
-
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: owner }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        defaultMakerTokenAddress = erc20TokenA.address;
-        defaultTakerTokenAddress = erc20TokenB.address;
-
-        const defaultOrderParams = {
-            ...constants.STATIC_ORDER_PARAMS,
-            senderAddress,
-            exchangeAddress: exchange.address,
-            makerAddress,
-            feeRecipientAddress,
-            makerAssetData: assetDataUtils.encodeERC20AssetData(defaultMakerTokenAddress),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(defaultTakerTokenAddress),
-        };
-        makerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
-        takerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(takerAddress)];
-        orderFactory = new OrderFactory(makerPrivateKey, defaultOrderParams);
-        makerTransactionFactory = new TransactionFactory(makerPrivateKey, exchange.address);
-        takerTransactionFactory = new TransactionFactory(takerPrivateKey, exchange.address);
-    });
-    describe('executeTransaction', () => {
-        describe('fillOrder', () => {
-            let takerAssetFillAmount: BigNumber;
-            beforeEach(async () => {
-                erc20Balances = await erc20Wrapper.getBalancesAsync();
-                signedOrder = await orderFactory.newSignedOrderAsync();
-                orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-
-                takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                const data = exchange.fillOrder.getABIEncodedTransactionData(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    signedOrder.signature,
-                );
-                signedTx = takerTransactionFactory.newSignedTransaction(data);
-            });
-
-            it('should throw if not called by specified sender', async () => {
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.executeTransactionAsync(signedTx, takerAddress),
-                    RevertReason.FailedExecution,
-                );
-            });
-
-            it('should transfer the correct amounts when signed by taker and called by sender', async () => {
-                await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const makerAssetFillAmount = takerAssetFillAmount
-                    .times(signedOrder.makerAssetAmount)
-                    .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                const makerFeePaid = signedOrder.makerFee
-                    .times(makerAssetFillAmount)
-                    .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                const takerFeePaid = signedOrder.takerFee
-                    .times(makerAssetFillAmount)
-                    .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                expect(newBalances[makerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerTokenAddress].minus(makerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerTokenAddress].add(takerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
-                );
-                expect(newBalances[takerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerTokenAddress].minus(takerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerTokenAddress].add(makerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
-                );
-            });
-
-            it('should throw if the a 0x transaction with the same transactionHash has already been executed', async () => {
-                await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.executeTransactionAsync(signedTx, senderAddress),
-                    RevertReason.InvalidTxHash,
-                );
-            });
-
-            it('should reset the currentContextAddress', async () => {
-                await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
-                const currentContextAddress = await exchange.currentContextAddress.callAsync();
-                expect(currentContextAddress).to.equal(constants.NULL_ADDRESS);
-            });
-        });
-
-        describe('cancelOrder', () => {
-            beforeEach(async () => {
-                const data = exchange.cancelOrder.getABIEncodedTransactionData(orderWithoutExchangeAddress);
-                signedTx = makerTransactionFactory.newSignedTransaction(data);
-            });
-
-            it('should throw if not called by specified sender', async () => {
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.executeTransactionAsync(signedTx, makerAddress),
-                    RevertReason.FailedExecution,
-                );
-            });
-
-            it('should cancel the order when signed by maker and called by sender', async () => {
-                await exchangeWrapper.executeTransactionAsync(signedTx, senderAddress);
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.fillOrderAsync(signedOrder, senderAddress),
-                    RevertReason.OrderUnfillable,
-                );
-            });
-        });
-
-        describe('cancelOrdersUpTo', () => {
-            let exchangeWrapperContract: ExchangeWrapperContract;
-
-            before(async () => {
-                exchangeWrapperContract = await ExchangeWrapperContract.deployFrom0xArtifactAsync(
-                    examplesArtifacts.ExchangeWrapper,
-                    provider,
-                    txDefaults,
-                    exchange.address,
-                );
-            });
-
-            it("should cancel an order if called from the order's sender", async () => {
-                const orderSalt = new BigNumber(0);
-                signedOrder = await orderFactory.newSignedOrderAsync({
-                    senderAddress: exchangeWrapperContract.address,
-                    salt: orderSalt,
-                });
-                const targetOrderEpoch = orderSalt.add(1);
-                const cancelData = exchange.cancelOrdersUpTo.getABIEncodedTransactionData(targetOrderEpoch);
-                const signedCancelTx = makerTransactionFactory.newSignedTransaction(cancelData);
-                await exchangeWrapperContract.cancelOrdersUpTo.sendTransactionAsync(
-                    targetOrderEpoch,
-                    signedCancelTx.salt,
-                    signedCancelTx.signature,
-                    {
-                        from: makerAddress,
-                    },
-                );
-
-                const takerAssetFillAmount = signedOrder.takerAssetAmount;
-                orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-                const fillData = exchange.fillOrder.getABIEncodedTransactionData(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    signedOrder.signature,
-                );
-                const signedFillTx = takerTransactionFactory.newSignedTransaction(fillData);
-                return expectTransactionFailedAsync(
-                    exchangeWrapperContract.fillOrder.sendTransactionAsync(
-                        orderWithoutExchangeAddress,
-                        takerAssetFillAmount,
-                        signedFillTx.salt,
-                        signedOrder.signature,
-                        signedFillTx.signature,
-                        { from: takerAddress },
-                    ),
-                    RevertReason.FailedExecution,
-                );
-            });
-
-            it("should not cancel an order if not called from the order's sender", async () => {
-                const orderSalt = new BigNumber(0);
-                signedOrder = await orderFactory.newSignedOrderAsync({
-                    senderAddress: exchangeWrapperContract.address,
-                    salt: orderSalt,
-                });
-                const targetOrderEpoch = orderSalt.add(1);
-                await exchangeWrapper.cancelOrdersUpToAsync(targetOrderEpoch, makerAddress);
-
-                erc20Balances = await erc20Wrapper.getBalancesAsync();
-                const takerAssetFillAmount = signedOrder.takerAssetAmount;
-                orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-                const data = exchange.fillOrder.getABIEncodedTransactionData(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    signedOrder.signature,
-                );
-                signedTx = takerTransactionFactory.newSignedTransaction(data);
-                await exchangeWrapperContract.fillOrder.sendTransactionAsync(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    signedTx.salt,
-                    signedOrder.signature,
-                    signedTx.signature,
-                    { from: takerAddress },
-                );
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                const makerAssetFillAmount = takerAssetFillAmount
-                    .times(signedOrder.makerAssetAmount)
-                    .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                const makerFeePaid = signedOrder.makerFee
-                    .times(makerAssetFillAmount)
-                    .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                const takerFeePaid = signedOrder.takerFee
-                    .times(makerAssetFillAmount)
-                    .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                expect(newBalances[makerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerTokenAddress].minus(makerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerTokenAddress].add(takerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
-                );
-                expect(newBalances[takerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerTokenAddress].minus(takerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerTokenAddress].add(makerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
-                );
-            });
-        });
-    });
-
-    describe('Whitelist', () => {
-        let whitelist: WhitelistContract;
-        let whitelistOrderFactory: OrderFactory;
-
-        before(async () => {
-            whitelist = await WhitelistContract.deployFrom0xArtifactAsync(
-                examplesArtifacts.Whitelist,
-                provider,
-                txDefaults,
-                exchange.address,
-            );
-            const isApproved = true;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await exchange.setSignatureValidatorApproval.sendTransactionAsync(whitelist.address, isApproved, {
-                    from: takerAddress,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            const defaultOrderParams = {
-                ...constants.STATIC_ORDER_PARAMS,
-                senderAddress: whitelist.address,
-                exchangeAddress: exchange.address,
-                makerAddress,
-                feeRecipientAddress,
-                makerAssetData: assetDataUtils.encodeERC20AssetData(defaultMakerTokenAddress),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(defaultTakerTokenAddress),
-            };
-            whitelistOrderFactory = new OrderFactory(makerPrivateKey, defaultOrderParams);
-        });
-
-        beforeEach(async () => {
-            signedOrder = await whitelistOrderFactory.newSignedOrderAsync();
-            erc20Balances = await erc20Wrapper.getBalancesAsync();
-        });
-
-        it('should revert if maker has not been whitelisted', async () => {
-            const isApproved = true;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await whitelist.updateWhitelistStatus.sendTransactionAsync(takerAddress, isApproved, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            const salt = generatePseudoRandomSalt();
-            return expectTransactionFailedAsync(
-                whitelist.fillOrderIfWhitelisted.sendTransactionAsync(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    salt,
-                    signedOrder.signature,
-                    { from: takerAddress },
-                ),
-                RevertReason.MakerNotWhitelisted,
-            );
-        });
-
-        it('should revert if taker has not been whitelisted', async () => {
-            const isApproved = true;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await whitelist.updateWhitelistStatus.sendTransactionAsync(makerAddress, isApproved, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            const salt = generatePseudoRandomSalt();
-            return expectTransactionFailedAsync(
-                whitelist.fillOrderIfWhitelisted.sendTransactionAsync(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    salt,
-                    signedOrder.signature,
-                    { from: takerAddress },
-                ),
-                RevertReason.TakerNotWhitelisted,
-            );
-        });
-
-        it('should fill the order if maker and taker have been whitelisted', async () => {
-            const isApproved = true;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await whitelist.updateWhitelistStatus.sendTransactionAsync(makerAddress, isApproved, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await whitelist.updateWhitelistStatus.sendTransactionAsync(takerAddress, isApproved, { from: owner }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            orderWithoutExchangeAddress = orderUtils.getOrderWithoutExchangeAddress(signedOrder);
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            const salt = generatePseudoRandomSalt();
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await whitelist.fillOrderIfWhitelisted.sendTransactionAsync(
-                    orderWithoutExchangeAddress,
-                    takerAssetFillAmount,
-                    salt,
-                    signedOrder.signature,
-                    { from: takerAddress },
-                ),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-
-            const makerAssetFillAmount = signedOrder.makerAssetAmount;
-            const makerFeePaid = signedOrder.makerFee;
-            const takerFeePaid = signedOrder.takerFee;
-
-            expect(newBalances[makerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultMakerTokenAddress].minus(makerAssetFillAmount),
-            );
-            expect(newBalances[makerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultTakerTokenAddress].add(takerAssetFillAmount),
-            );
-            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrxToken.address].minus(makerFeePaid),
-            );
-            expect(newBalances[takerAddress][defaultTakerTokenAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultTakerTokenAddress].minus(takerAssetFillAmount),
-            );
-            expect(newBalances[takerAddress][defaultMakerTokenAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultMakerTokenAddress].add(makerAssetFillAmount),
-            );
-            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrxToken.address].minus(takerFeePaid),
-            );
-            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFeePaid.add(takerFeePaid)),
-            );
-        });
-    });
-});
diff --git a/contracts/core/test/exchange/wrapper.ts b/contracts/core/test/exchange/wrapper.ts
deleted file mode 100644
index c9efb0c9d..000000000
--- a/contracts/core/test/exchange/wrapper.ts
+++ /dev/null
@@ -1,1461 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    ERC20BalancesByOwner,
-    expectTransactionFailedAsync,
-    getLatestBlockTimestampAsync,
-    increaseTimeAndMineBlockAsync,
-    OrderFactory,
-    OrderStatus,
-    provider,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import {
-    artifacts as tokensArtifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ReentrantERC20TokenContract,
-} from '@0x/contracts-tokens';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
-import { RevertReason, SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { ExchangeContract } from '../../generated-wrappers/exchange';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-describe('Exchange wrappers', () => {
-    let makerAddress: string;
-    let owner: string;
-    let takerAddress: string;
-    let feeRecipientAddress: string;
-
-    let erc20TokenA: DummyERC20TokenContract;
-    let erc20TokenB: DummyERC20TokenContract;
-    let zrxToken: DummyERC20TokenContract;
-    let erc721Token: DummyERC721TokenContract;
-    let exchange: ExchangeContract;
-    let erc20Proxy: ERC20ProxyContract;
-    let erc721Proxy: ERC721ProxyContract;
-    let reentrantErc20Token: ReentrantERC20TokenContract;
-
-    let exchangeWrapper: ExchangeWrapper;
-    let erc20Wrapper: ERC20Wrapper;
-    let erc721Wrapper: ERC721Wrapper;
-    let erc20Balances: ERC20BalancesByOwner;
-    let orderFactory: OrderFactory;
-
-    let erc721MakerAssetId: BigNumber;
-    let erc721TakerAssetId: BigNumber;
-
-    let defaultMakerAssetAddress: string;
-    let defaultTakerAssetAddress: string;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        const usedAddresses = ([owner, makerAddress, takerAddress, feeRecipientAddress] = _.slice(accounts, 0, 4));
-
-        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
-        erc721Wrapper = new ERC721Wrapper(provider, usedAddresses, owner);
-
-        const numDummyErc20ToDeploy = 3;
-        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
-            numDummyErc20ToDeploy,
-            constants.DUMMY_TOKEN_DECIMALS,
-        );
-        erc20Proxy = await erc20Wrapper.deployProxyAsync();
-        await erc20Wrapper.setBalancesAndAllowancesAsync();
-
-        [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-        erc721Proxy = await erc721Wrapper.deployProxyAsync();
-        await erc721Wrapper.setBalancesAndAllowancesAsync();
-        const erc721Balances = await erc721Wrapper.getBalancesAsync();
-        erc721MakerAssetId = erc721Balances[makerAddress][erc721Token.address][0];
-        erc721TakerAssetId = erc721Balances[takerAddress][erc721Token.address][0];
-
-        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
-            provider,
-            txDefaults,
-            assetDataUtils.encodeERC20AssetData(zrxToken.address),
-        );
-        exchangeWrapper = new ExchangeWrapper(exchange, provider);
-        await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, owner);
-        await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, owner);
-
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, {
-                from: owner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-
-        reentrantErc20Token = await ReentrantERC20TokenContract.deployFrom0xArtifactAsync(
-            tokensArtifacts.ReentrantERC20Token,
-            provider,
-            txDefaults,
-            exchange.address,
-        );
-
-        defaultMakerAssetAddress = erc20TokenA.address;
-        defaultTakerAssetAddress = erc20TokenB.address;
-
-        const defaultOrderParams = {
-            ...constants.STATIC_ORDER_PARAMS,
-            exchangeAddress: exchange.address,
-            makerAddress,
-            feeRecipientAddress,
-            makerAssetData: assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
-            takerAssetData: assetDataUtils.encodeERC20AssetData(defaultTakerAssetAddress),
-        };
-        const privateKey = constants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
-        orderFactory = new OrderFactory(privateKey, defaultOrderParams);
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-        erc20Balances = await erc20Wrapper.getBalancesAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    describe('fillOrKillOrder', () => {
-        const reentrancyTest = (functionNames: string[]) => {
-            _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                const description = `should not allow fillOrKillOrder to reenter the Exchange contract via ${functionName}`;
-                it(description, async () => {
-                    const signedOrder = await orderFactory.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                    });
-                    await web3Wrapper.awaitTransactionSuccessAsync(
-                        await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                        constants.AWAIT_TRANSACTION_MINED_MS,
-                    );
-                    await expectTransactionFailedAsync(
-                        exchangeWrapper.fillOrKillOrderAsync(signedOrder, takerAddress),
-                        RevertReason.TransferFailed,
-                    );
-                });
-            });
-        };
-        describe('fillOrKillOrder reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-        it('should transfer the correct amounts', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(200), 18),
-            });
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-            await exchangeWrapper.fillOrKillOrderAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount,
-            });
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-
-            const makerAssetFilledAmount = takerAssetFillAmount
-                .times(signedOrder.makerAssetAmount)
-                .dividedToIntegerBy(signedOrder.takerAssetAmount);
-            const makerFee = signedOrder.makerFee
-                .times(makerAssetFilledAmount)
-                .dividedToIntegerBy(signedOrder.makerAssetAmount);
-            const takerFee = signedOrder.takerFee
-                .times(makerAssetFilledAmount)
-                .dividedToIntegerBy(signedOrder.makerAssetAmount);
-            expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFilledAmount),
-            );
-            expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
-            );
-            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-            );
-            expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
-            );
-            expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
-            );
-            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-            );
-            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-            );
-        });
-
-        it('should throw if a signedOrder is expired', async () => {
-            const currentTimestamp = await getLatestBlockTimestampAsync();
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                expirationTimeSeconds: new BigNumber(currentTimestamp).sub(10),
-            });
-
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrKillOrderAsync(signedOrder, takerAddress),
-                RevertReason.OrderUnfillable,
-            );
-        });
-
-        it('should throw if entire takerAssetFillAmount not filled', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync();
-
-            await exchangeWrapper.fillOrderAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount: signedOrder.takerAssetAmount.div(2),
-            });
-
-            return expectTransactionFailedAsync(
-                exchangeWrapper.fillOrKillOrderAsync(signedOrder, takerAddress),
-                RevertReason.CompleteFillFailed,
-            );
-        });
-    });
-
-    describe('fillOrderNoThrow', () => {
-        const reentrancyTest = (functionNames: string[]) => {
-            _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                const description = `should not allow fillOrderNoThrow to reenter the Exchange contract via ${functionName}`;
-                it(description, async () => {
-                    const signedOrder = await orderFactory.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                    });
-                    await web3Wrapper.awaitTransactionSuccessAsync(
-                        await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                        constants.AWAIT_TRANSACTION_MINED_MS,
-                    );
-                    await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-                    const newBalances = await erc20Wrapper.getBalancesAsync();
-                    expect(erc20Balances).to.deep.equal(newBalances);
-                });
-            });
-        };
-        describe('fillOrderNoThrow reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-        it('should transfer the correct amounts', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100), 18),
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(200), 18),
-            });
-            const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount,
-                // HACK(albrow): We need to hardcode the gas estimate here because
-                // the Geth gas estimator doesn't work with the way we use
-                // delegatecall and swallow errors.
-                gas: 250000,
-            });
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            const makerAssetFilledAmount = takerAssetFillAmount
-                .times(signedOrder.makerAssetAmount)
-                .dividedToIntegerBy(signedOrder.takerAssetAmount);
-            const makerFee = signedOrder.makerFee
-                .times(makerAssetFilledAmount)
-                .dividedToIntegerBy(signedOrder.makerAssetAmount);
-            const takerFee = signedOrder.takerFee
-                .times(makerAssetFilledAmount)
-                .dividedToIntegerBy(signedOrder.makerAssetAmount);
-
-            expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFilledAmount),
-            );
-            expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
-            );
-            expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-            );
-            expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
-            );
-            expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
-            );
-            expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-            );
-            expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-            );
-        });
-
-        it('should not change erc20Balances if maker erc20Balances are too low to fill order', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18),
-            });
-
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if taker erc20Balances are too low to fill order', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                takerAssetAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18),
-            });
-
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if maker allowances are too low to fill order', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync();
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc20TokenA.approve.sendTransactionAsync(erc20Proxy.address, new BigNumber(0), {
-                    from: makerAddress,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc20TokenA.approve.sendTransactionAsync(erc20Proxy.address, constants.INITIAL_ERC20_ALLOWANCE, {
-                    from: makerAddress,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if taker allowances are too low to fill order', async () => {
-            const signedOrder = await orderFactory.newSignedOrderAsync();
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc20TokenB.approve.sendTransactionAsync(erc20Proxy.address, new BigNumber(0), {
-                    from: takerAddress,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await erc20TokenB.approve.sendTransactionAsync(erc20Proxy.address, constants.INITIAL_ERC20_ALLOWANCE, {
-                    from: takerAddress,
-                }),
-                constants.AWAIT_TRANSACTION_MINED_MS,
-            );
-
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if makerAssetAddress is ZRX, makerAssetAmount + makerFee > maker balance', async () => {
-            const makerZRXBalance = new BigNumber(erc20Balances[makerAddress][zrxToken.address]);
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: makerZRXBalance,
-                makerFee: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-            });
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if makerAssetAddress is ZRX, makerAssetAmount + makerFee > maker allowance', async () => {
-            const makerZRXAllowance = await zrxToken.allowance.callAsync(makerAddress, erc20Proxy.address);
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(makerZRXAllowance),
-                makerFee: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-            });
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if takerAssetAddress is ZRX, takerAssetAmount + takerFee > taker balance', async () => {
-            const takerZRXBalance = new BigNumber(erc20Balances[takerAddress][zrxToken.address]);
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                takerAssetAmount: takerZRXBalance,
-                takerFee: new BigNumber(1),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-            });
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should not change erc20Balances if takerAssetAddress is ZRX, takerAssetAmount + takerFee > taker allowance', async () => {
-            const takerZRXAllowance = await zrxToken.allowance.callAsync(takerAddress, erc20Proxy.address);
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                takerAssetAmount: new BigNumber(takerZRXAllowance),
-                takerFee: new BigNumber(1),
-                takerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-            });
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress);
-            const newBalances = await erc20Wrapper.getBalancesAsync();
-            expect(newBalances).to.be.deep.equal(erc20Balances);
-        });
-
-        it('should successfully exchange ERC721 tokens', async () => {
-            // Construct Exchange parameters
-            const makerAssetId = erc721MakerAssetId;
-            const takerAssetId = erc721TakerAssetId;
-            const signedOrder = await orderFactory.newSignedOrderAsync({
-                makerAssetAmount: new BigNumber(1),
-                takerAssetAmount: new BigNumber(1),
-                makerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId),
-                takerAssetData: assetDataUtils.encodeERC721AssetData(erc721Token.address, takerAssetId),
-            });
-            // Verify pre-conditions
-            const initialOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(initialOwnerMakerAsset).to.be.bignumber.equal(makerAddress);
-            const initialOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(initialOwnerTakerAsset).to.be.bignumber.equal(takerAddress);
-            // Call Exchange
-            const takerAssetFillAmount = signedOrder.takerAssetAmount;
-            await exchangeWrapper.fillOrderNoThrowAsync(signedOrder, takerAddress, {
-                takerAssetFillAmount,
-                // HACK(albrow): We need to hardcode the gas estimate here because
-                // the Geth gas estimator doesn't work with the way we use
-                // delegatecall and swallow errors.
-                gas: 280000,
-            });
-            // Verify post-conditions
-            const newOwnerMakerAsset = await erc721Token.ownerOf.callAsync(makerAssetId);
-            expect(newOwnerMakerAsset).to.be.bignumber.equal(takerAddress);
-            const newOwnerTakerAsset = await erc721Token.ownerOf.callAsync(takerAssetId);
-            expect(newOwnerTakerAsset).to.be.bignumber.equal(makerAddress);
-        });
-    });
-
-    describe('batch functions', () => {
-        let signedOrders: SignedOrder[];
-        beforeEach(async () => {
-            signedOrders = [
-                await orderFactory.newSignedOrderAsync(),
-                await orderFactory.newSignedOrderAsync(),
-                await orderFactory.newSignedOrderAsync(),
-            ];
-        });
-
-        describe('batchFillOrders', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow batchFillOrders to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await expectTransactionFailedAsync(
-                            exchangeWrapper.batchFillOrdersAsync([signedOrder], takerAddress),
-                            RevertReason.TransferFailed,
-                        );
-                    });
-                });
-            };
-            describe('batchFillOrders reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should transfer the correct amounts', async () => {
-                const takerAssetFillAmounts: BigNumber[] = [];
-                const makerAssetAddress = erc20TokenA.address;
-                const takerAssetAddress = erc20TokenB.address;
-                _.forEach(signedOrders, signedOrder => {
-                    const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                    const makerAssetFilledAmount = takerAssetFillAmount
-                        .times(signedOrder.makerAssetAmount)
-                        .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                    const makerFee = signedOrder.makerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    const takerFee = signedOrder.takerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    takerAssetFillAmounts.push(takerAssetFillAmount);
-                    erc20Balances[makerAddress][makerAssetAddress] = erc20Balances[makerAddress][
-                        makerAssetAddress
-                    ].minus(makerAssetFilledAmount);
-                    erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
-                        takerAssetFillAmount,
-                    );
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        makerFee,
-                    );
-                    erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
-                        makerAssetFilledAmount,
-                    );
-                    erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
-                        takerAssetAddress
-                    ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(makerFee.add(takerFee));
-                });
-
-                await exchangeWrapper.batchFillOrdersAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmounts,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-        });
-
-        describe('batchFillOrKillOrders', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow batchFillOrKillOrders to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await expectTransactionFailedAsync(
-                            exchangeWrapper.batchFillOrKillOrdersAsync([signedOrder], takerAddress),
-                            RevertReason.TransferFailed,
-                        );
-                    });
-                });
-            };
-            describe('batchFillOrKillOrders reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should transfer the correct amounts', async () => {
-                const takerAssetFillAmounts: BigNumber[] = [];
-                const makerAssetAddress = erc20TokenA.address;
-                const takerAssetAddress = erc20TokenB.address;
-                _.forEach(signedOrders, signedOrder => {
-                    const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                    const makerAssetFilledAmount = takerAssetFillAmount
-                        .times(signedOrder.makerAssetAmount)
-                        .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                    const makerFee = signedOrder.makerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    const takerFee = signedOrder.takerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    takerAssetFillAmounts.push(takerAssetFillAmount);
-                    erc20Balances[makerAddress][makerAssetAddress] = erc20Balances[makerAddress][
-                        makerAssetAddress
-                    ].minus(makerAssetFilledAmount);
-                    erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
-                        takerAssetFillAmount,
-                    );
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        makerFee,
-                    );
-                    erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
-                        makerAssetFilledAmount,
-                    );
-                    erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
-                        takerAssetAddress
-                    ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(makerFee.add(takerFee));
-                });
-
-                await exchangeWrapper.batchFillOrKillOrdersAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmounts,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should throw if a single signedOrder does not fill the expected amount', async () => {
-                const takerAssetFillAmounts: BigNumber[] = [];
-                _.forEach(signedOrders, signedOrder => {
-                    const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                    takerAssetFillAmounts.push(takerAssetFillAmount);
-                });
-
-                await exchangeWrapper.fillOrKillOrderAsync(signedOrders[0], takerAddress);
-
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.batchFillOrKillOrdersAsync(signedOrders, takerAddress, {
-                        takerAssetFillAmounts,
-                    }),
-                    RevertReason.OrderUnfillable,
-                );
-            });
-        });
-
-        describe('batchFillOrdersNoThrow', async () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow batchFillOrdersNoThrow to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await exchangeWrapper.batchFillOrdersNoThrowAsync([signedOrder], takerAddress);
-                        const newBalances = await erc20Wrapper.getBalancesAsync();
-                        expect(erc20Balances).to.deep.equal(newBalances);
-                    });
-                });
-            };
-            describe('batchFillOrdersNoThrow reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should transfer the correct amounts', async () => {
-                const takerAssetFillAmounts: BigNumber[] = [];
-                const makerAssetAddress = erc20TokenA.address;
-                const takerAssetAddress = erc20TokenB.address;
-                _.forEach(signedOrders, signedOrder => {
-                    const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                    const makerAssetFilledAmount = takerAssetFillAmount
-                        .times(signedOrder.makerAssetAmount)
-                        .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                    const makerFee = signedOrder.makerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    const takerFee = signedOrder.takerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    takerAssetFillAmounts.push(takerAssetFillAmount);
-                    erc20Balances[makerAddress][makerAssetAddress] = erc20Balances[makerAddress][
-                        makerAssetAddress
-                    ].minus(makerAssetFilledAmount);
-                    erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
-                        takerAssetFillAmount,
-                    );
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        makerFee,
-                    );
-                    erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
-                        makerAssetFilledAmount,
-                    );
-                    erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
-                        takerAssetAddress
-                    ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(makerFee.add(takerFee));
-                });
-
-                await exchangeWrapper.batchFillOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmounts,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should not throw if an order is invalid and fill the remaining orders', async () => {
-                const takerAssetFillAmounts: BigNumber[] = [];
-                const makerAssetAddress = erc20TokenA.address;
-                const takerAssetAddress = erc20TokenB.address;
-
-                const invalidOrder = {
-                    ...signedOrders[0],
-                    signature: '0x00',
-                };
-                const validOrders = signedOrders.slice(1);
-
-                takerAssetFillAmounts.push(invalidOrder.takerAssetAmount.div(2));
-                _.forEach(validOrders, signedOrder => {
-                    const takerAssetFillAmount = signedOrder.takerAssetAmount.div(2);
-                    const makerAssetFilledAmount = takerAssetFillAmount
-                        .times(signedOrder.makerAssetAmount)
-                        .dividedToIntegerBy(signedOrder.takerAssetAmount);
-                    const makerFee = signedOrder.makerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    const takerFee = signedOrder.takerFee
-                        .times(makerAssetFilledAmount)
-                        .dividedToIntegerBy(signedOrder.makerAssetAmount);
-                    takerAssetFillAmounts.push(takerAssetFillAmount);
-                    erc20Balances[makerAddress][makerAssetAddress] = erc20Balances[makerAddress][
-                        makerAssetAddress
-                    ].minus(makerAssetFilledAmount);
-                    erc20Balances[makerAddress][takerAssetAddress] = erc20Balances[makerAddress][takerAssetAddress].add(
-                        takerAssetFillAmount,
-                    );
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        makerFee,
-                    );
-                    erc20Balances[takerAddress][makerAssetAddress] = erc20Balances[takerAddress][makerAssetAddress].add(
-                        makerAssetFilledAmount,
-                    );
-                    erc20Balances[takerAddress][takerAssetAddress] = erc20Balances[takerAddress][
-                        takerAssetAddress
-                    ].minus(takerAssetFillAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(makerFee.add(takerFee));
-                });
-
-                const newOrders = [invalidOrder, ...validOrders];
-                await exchangeWrapper.batchFillOrdersNoThrowAsync(newOrders, takerAddress, {
-                    takerAssetFillAmounts,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 450000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-        });
-
-        describe('marketSellOrders', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow marketSellOrders to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await expectTransactionFailedAsync(
-                            exchangeWrapper.marketSellOrdersAsync([signedOrder], takerAddress, {
-                                takerAssetFillAmount: signedOrder.takerAssetAmount,
-                            }),
-                            RevertReason.TransferFailed,
-                        );
-                    });
-                });
-            };
-            describe('marketSellOrders reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should stop when the entire takerAssetFillAmount is filled', async () => {
-                const takerAssetFillAmount = signedOrders[0].takerAssetAmount.plus(
-                    signedOrders[1].takerAssetAmount.div(2),
-                );
-                await exchangeWrapper.marketSellOrdersAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmount,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-
-                const makerAssetFilledAmount = signedOrders[0].makerAssetAmount.add(
-                    signedOrders[1].makerAssetAmount.dividedToIntegerBy(2),
-                );
-                const makerFee = signedOrders[0].makerFee.add(signedOrders[1].makerFee.dividedToIntegerBy(2));
-                const takerFee = signedOrders[0].takerFee.add(signedOrders[1].takerFee.dividedToIntegerBy(2));
-                expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFilledAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-                );
-                expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-                );
-            });
-
-            it('should fill all signedOrders if cannot fill entire takerAssetFillAmount', async () => {
-                const takerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                _.forEach(signedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketSellOrdersAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmount,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should throw when a signedOrder does not use the same takerAssetAddress', async () => {
-                signedOrders = [
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync({
-                        takerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-                    }),
-                    await orderFactory.newSignedOrderAsync(),
-                ];
-
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.marketSellOrdersAsync(signedOrders, takerAddress, {
-                        takerAssetFillAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1000), 18),
-                    }),
-                    // We simply use the takerAssetData from the first order for all orders.
-                    // If they are not the same, the contract throws when validating the order signature
-                    RevertReason.InvalidOrderSignature,
-                );
-            });
-        });
-
-        describe('marketSellOrdersNoThrow', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow marketSellOrdersNoThrow to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await exchangeWrapper.marketSellOrdersNoThrowAsync([signedOrder], takerAddress, {
-                            takerAssetFillAmount: signedOrder.takerAssetAmount,
-                        });
-                        const newBalances = await erc20Wrapper.getBalancesAsync();
-                        expect(erc20Balances).to.deep.equal(newBalances);
-                    });
-                });
-            };
-            describe('marketSellOrdersNoThrow reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should stop when the entire takerAssetFillAmount is filled', async () => {
-                const takerAssetFillAmount = signedOrders[0].takerAssetAmount.plus(
-                    signedOrders[1].takerAssetAmount.div(2),
-                );
-                await exchangeWrapper.marketSellOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 6000000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-
-                const makerAssetFilledAmount = signedOrders[0].makerAssetAmount.add(
-                    signedOrders[1].makerAssetAmount.dividedToIntegerBy(2),
-                );
-                const makerFee = signedOrders[0].makerFee.add(signedOrders[1].makerFee.dividedToIntegerBy(2));
-                const takerFee = signedOrders[0].takerFee.add(signedOrders[1].takerFee.dividedToIntegerBy(2));
-                expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFilledAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerAssetAddress].add(takerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-                );
-                expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerAssetAddress].minus(takerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFilledAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-                );
-            });
-
-            it('should fill all signedOrders if cannot fill entire takerAssetFillAmount', async () => {
-                const takerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                _.forEach(signedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketSellOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should not fill a signedOrder that does not use the same takerAssetAddress', async () => {
-                signedOrders = [
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync({
-                        takerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-                    }),
-                ];
-                const takerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                const filledSignedOrders = signedOrders.slice(0, -1);
-                _.forEach(filledSignedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketSellOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-        });
-
-        describe('marketBuyOrders', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow marketBuyOrders to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await expectTransactionFailedAsync(
-                            exchangeWrapper.marketBuyOrdersAsync([signedOrder], takerAddress, {
-                                makerAssetFillAmount: signedOrder.makerAssetAmount,
-                            }),
-                            RevertReason.TransferFailed,
-                        );
-                    });
-                });
-            };
-            describe('marketBuyOrders reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should stop when the entire makerAssetFillAmount is filled', async () => {
-                const makerAssetFillAmount = signedOrders[0].makerAssetAmount.plus(
-                    signedOrders[1].makerAssetAmount.div(2),
-                );
-                await exchangeWrapper.marketBuyOrdersAsync(signedOrders, takerAddress, {
-                    makerAssetFillAmount,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-
-                const makerAmountBought = signedOrders[0].takerAssetAmount.add(
-                    signedOrders[1].takerAssetAmount.dividedToIntegerBy(2),
-                );
-                const makerFee = signedOrders[0].makerFee.add(signedOrders[1].makerFee.dividedToIntegerBy(2));
-                const takerFee = signedOrders[0].takerFee.add(signedOrders[1].takerFee.dividedToIntegerBy(2));
-                expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerAssetAddress].add(makerAmountBought),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-                );
-                expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerAssetAddress].minus(makerAmountBought),
-                );
-                expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-                );
-            });
-
-            it('should fill all signedOrders if cannot fill entire makerAssetFillAmount', async () => {
-                const makerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                _.forEach(signedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketBuyOrdersAsync(signedOrders, takerAddress, {
-                    makerAssetFillAmount,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should throw when a signedOrder does not use the same makerAssetAddress', async () => {
-                signedOrders = [
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-                    }),
-                    await orderFactory.newSignedOrderAsync(),
-                ];
-
-                return expectTransactionFailedAsync(
-                    exchangeWrapper.marketBuyOrdersAsync(signedOrders, takerAddress, {
-                        makerAssetFillAmount: Web3Wrapper.toBaseUnitAmount(new BigNumber(1000), 18),
-                    }),
-                    RevertReason.InvalidOrderSignature,
-                );
-            });
-        });
-
-        describe('marketBuyOrdersNoThrow', () => {
-            const reentrancyTest = (functionNames: string[]) => {
-                _.forEach(functionNames, async (functionName: string, functionId: number) => {
-                    const description = `should not allow marketBuyOrdersNoThrow to reenter the Exchange contract via ${functionName}`;
-                    it(description, async () => {
-                        const signedOrder = await orderFactory.newSignedOrderAsync({
-                            makerAssetData: assetDataUtils.encodeERC20AssetData(reentrantErc20Token.address),
-                        });
-                        await web3Wrapper.awaitTransactionSuccessAsync(
-                            await reentrantErc20Token.setCurrentFunction.sendTransactionAsync(functionId),
-                            constants.AWAIT_TRANSACTION_MINED_MS,
-                        );
-                        await exchangeWrapper.marketBuyOrdersNoThrowAsync([signedOrder], takerAddress, {
-                            makerAssetFillAmount: signedOrder.makerAssetAmount,
-                        });
-                        const newBalances = await erc20Wrapper.getBalancesAsync();
-                        expect(erc20Balances).to.deep.equal(newBalances);
-                    });
-                });
-            };
-            describe('marketBuyOrdersNoThrow reentrancy tests', () => reentrancyTest(constants.FUNCTIONS_WITH_MUTEX));
-
-            it('should stop when the entire makerAssetFillAmount is filled', async () => {
-                const makerAssetFillAmount = signedOrders[0].makerAssetAmount.plus(
-                    signedOrders[1].makerAssetAmount.div(2),
-                );
-                await exchangeWrapper.marketBuyOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    makerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-
-                const makerAmountBought = signedOrders[0].takerAssetAmount.add(
-                    signedOrders[1].takerAssetAmount.dividedToIntegerBy(2),
-                );
-                const makerFee = signedOrders[0].makerFee.add(signedOrders[1].makerFee.dividedToIntegerBy(2));
-                const takerFee = signedOrders[0].takerFee.add(signedOrders[1].takerFee.dividedToIntegerBy(2));
-                expect(newBalances[makerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultMakerAssetAddress].minus(makerAssetFillAmount),
-                );
-                expect(newBalances[makerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][defaultTakerAssetAddress].add(makerAmountBought),
-                );
-                expect(newBalances[makerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[makerAddress][zrxToken.address].minus(makerFee),
-                );
-                expect(newBalances[takerAddress][defaultTakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultTakerAssetAddress].minus(makerAmountBought),
-                );
-                expect(newBalances[takerAddress][defaultMakerAssetAddress]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][defaultMakerAssetAddress].add(makerAssetFillAmount),
-                );
-                expect(newBalances[takerAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[takerAddress][zrxToken.address].minus(takerFee),
-                );
-                expect(newBalances[feeRecipientAddress][zrxToken.address]).to.be.bignumber.equal(
-                    erc20Balances[feeRecipientAddress][zrxToken.address].add(makerFee.add(takerFee)),
-                );
-            });
-
-            it('should fill all signedOrders if cannot fill entire makerAssetFillAmount', async () => {
-                const makerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                _.forEach(signedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketBuyOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    makerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-
-            it('should not fill a signedOrder that does not use the same makerAssetAddress', async () => {
-                signedOrders = [
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync({
-                        makerAssetData: assetDataUtils.encodeERC20AssetData(zrxToken.address),
-                    }),
-                ];
-
-                const makerAssetFillAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(100000), 18);
-                const filledSignedOrders = signedOrders.slice(0, -1);
-                _.forEach(filledSignedOrders, signedOrder => {
-                    erc20Balances[makerAddress][defaultMakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultMakerAssetAddress
-                    ].minus(signedOrder.makerAssetAmount);
-                    erc20Balances[makerAddress][defaultTakerAssetAddress] = erc20Balances[makerAddress][
-                        defaultTakerAssetAddress
-                    ].add(signedOrder.takerAssetAmount);
-                    erc20Balances[makerAddress][zrxToken.address] = erc20Balances[makerAddress][zrxToken.address].minus(
-                        signedOrder.makerFee,
-                    );
-                    erc20Balances[takerAddress][defaultMakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultMakerAssetAddress
-                    ].add(signedOrder.makerAssetAmount);
-                    erc20Balances[takerAddress][defaultTakerAssetAddress] = erc20Balances[takerAddress][
-                        defaultTakerAssetAddress
-                    ].minus(signedOrder.takerAssetAmount);
-                    erc20Balances[takerAddress][zrxToken.address] = erc20Balances[takerAddress][zrxToken.address].minus(
-                        signedOrder.takerFee,
-                    );
-                    erc20Balances[feeRecipientAddress][zrxToken.address] = erc20Balances[feeRecipientAddress][
-                        zrxToken.address
-                    ].add(signedOrder.makerFee.add(signedOrder.takerFee));
-                });
-                await exchangeWrapper.marketBuyOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    makerAssetFillAmount,
-                    // HACK(albrow): We need to hardcode the gas estimate here because
-                    // the Geth gas estimator doesn't work with the way we use
-                    // delegatecall and swallow errors.
-                    gas: 600000,
-                });
-
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(newBalances).to.be.deep.equal(erc20Balances);
-            });
-        });
-
-        describe('batchCancelOrders', () => {
-            it('should be able to cancel multiple signedOrders', async () => {
-                const takerAssetCancelAmounts = _.map(signedOrders, signedOrder => signedOrder.takerAssetAmount);
-                await exchangeWrapper.batchCancelOrdersAsync(signedOrders, makerAddress);
-
-                await exchangeWrapper.batchFillOrdersNoThrowAsync(signedOrders, takerAddress, {
-                    takerAssetFillAmounts: takerAssetCancelAmounts,
-                });
-                const newBalances = await erc20Wrapper.getBalancesAsync();
-                expect(erc20Balances).to.be.deep.equal(newBalances);
-            });
-        });
-
-        describe('getOrdersInfo', () => {
-            beforeEach(async () => {
-                signedOrders = [
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync(),
-                    await orderFactory.newSignedOrderAsync(),
-                ];
-            });
-            it('should get the correct information for multiple unfilled orders', async () => {
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = new BigNumber(0);
-                    const expectedOrderStatus = OrderStatus.FILLABLE;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple partially filled orders', async () => {
-                const takerAssetFillAmounts = _.map(signedOrders, signedOrder => signedOrder.takerAssetAmount.div(2));
-                await exchangeWrapper.batchFillOrdersAsync(signedOrders, takerAddress, { takerAssetFillAmounts });
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount.div(2);
-                    const expectedOrderStatus = OrderStatus.FILLABLE;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple fully filled orders', async () => {
-                await exchangeWrapper.batchFillOrdersAsync(signedOrders, takerAddress);
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount;
-                    const expectedOrderStatus = OrderStatus.FULLY_FILLED;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple cancelled and unfilled orders', async () => {
-                await exchangeWrapper.batchCancelOrdersAsync(signedOrders, makerAddress);
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = new BigNumber(0);
-                    const expectedOrderStatus = OrderStatus.CANCELLED;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple cancelled and partially filled orders', async () => {
-                const takerAssetFillAmounts = _.map(signedOrders, signedOrder => signedOrder.takerAssetAmount.div(2));
-                await exchangeWrapper.batchFillOrdersAsync(signedOrders, takerAddress, { takerAssetFillAmounts });
-                await exchangeWrapper.batchCancelOrdersAsync(signedOrders, makerAddress);
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount.div(2);
-                    const expectedOrderStatus = OrderStatus.CANCELLED;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple expired and unfilled orders', async () => {
-                const currentTimestamp = await getLatestBlockTimestampAsync();
-                const timeUntilExpiration = signedOrders[0].expirationTimeSeconds.minus(currentTimestamp).toNumber();
-                await increaseTimeAndMineBlockAsync(timeUntilExpiration);
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = new BigNumber(0);
-                    const expectedOrderStatus = OrderStatus.EXPIRED;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for multiple expired and partially filled orders', async () => {
-                const takerAssetFillAmounts = _.map(signedOrders, signedOrder => signedOrder.takerAssetAmount.div(2));
-                await exchangeWrapper.batchFillOrdersAsync(signedOrders, takerAddress, { takerAssetFillAmounts });
-                const currentTimestamp = await getLatestBlockTimestampAsync();
-                const timeUntilExpiration = signedOrders[0].expirationTimeSeconds.minus(currentTimestamp).toNumber();
-                await increaseTimeAndMineBlockAsync(timeUntilExpiration);
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(3);
-                _.forEach(signedOrders, (signedOrder, index) => {
-                    const expectedOrderHash = orderHashUtils.getOrderHashHex(signedOrder);
-                    const expectedTakerAssetFilledAmount = signedOrder.takerAssetAmount.div(2);
-                    const expectedOrderStatus = OrderStatus.EXPIRED;
-                    const orderInfo = ordersInfo[index];
-                    expect(orderInfo.orderHash).to.be.equal(expectedOrderHash);
-                    expect(orderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(expectedTakerAssetFilledAmount);
-                    expect(orderInfo.orderStatus).to.equal(expectedOrderStatus);
-                });
-            });
-            it('should get the correct information for a mix of unfilled, partially filled, fully filled, cancelled, and expired orders', async () => {
-                const unfilledOrder = await orderFactory.newSignedOrderAsync();
-                const partiallyFilledOrder = await orderFactory.newSignedOrderAsync();
-                await exchangeWrapper.fillOrderAsync(partiallyFilledOrder, takerAddress, {
-                    takerAssetFillAmount: partiallyFilledOrder.takerAssetAmount.div(2),
-                });
-                const fullyFilledOrder = await orderFactory.newSignedOrderAsync();
-                await exchangeWrapper.fillOrderAsync(fullyFilledOrder, takerAddress);
-                const cancelledOrder = await orderFactory.newSignedOrderAsync();
-                await exchangeWrapper.cancelOrderAsync(cancelledOrder, makerAddress);
-                const currentTimestamp = await getLatestBlockTimestampAsync();
-                const expiredOrder = await orderFactory.newSignedOrderAsync({
-                    expirationTimeSeconds: new BigNumber(currentTimestamp),
-                });
-                signedOrders = [unfilledOrder, partiallyFilledOrder, fullyFilledOrder, cancelledOrder, expiredOrder];
-                const ordersInfo = await exchangeWrapper.getOrdersInfoAsync(signedOrders);
-                expect(ordersInfo.length).to.be.equal(5);
-
-                const expectedUnfilledOrderHash = orderHashUtils.getOrderHashHex(unfilledOrder);
-                const expectedUnfilledTakerAssetFilledAmount = new BigNumber(0);
-                const expectedUnfilledOrderStatus = OrderStatus.FILLABLE;
-                const unfilledOrderInfo = ordersInfo[0];
-                expect(unfilledOrderInfo.orderHash).to.be.equal(expectedUnfilledOrderHash);
-                expect(unfilledOrderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(
-                    expectedUnfilledTakerAssetFilledAmount,
-                );
-                expect(unfilledOrderInfo.orderStatus).to.be.equal(expectedUnfilledOrderStatus);
-
-                const expectedPartialOrderHash = orderHashUtils.getOrderHashHex(partiallyFilledOrder);
-                const expectedPartialTakerAssetFilledAmount = partiallyFilledOrder.takerAssetAmount.div(2);
-                const expectedPartialOrderStatus = OrderStatus.FILLABLE;
-                const partialOrderInfo = ordersInfo[1];
-                expect(partialOrderInfo.orderHash).to.be.equal(expectedPartialOrderHash);
-                expect(partialOrderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(
-                    expectedPartialTakerAssetFilledAmount,
-                );
-                expect(partialOrderInfo.orderStatus).to.be.equal(expectedPartialOrderStatus);
-
-                const expectedFilledOrderHash = orderHashUtils.getOrderHashHex(fullyFilledOrder);
-                const expectedFilledTakerAssetFilledAmount = fullyFilledOrder.takerAssetAmount;
-                const expectedFilledOrderStatus = OrderStatus.FULLY_FILLED;
-                const filledOrderInfo = ordersInfo[2];
-                expect(filledOrderInfo.orderHash).to.be.equal(expectedFilledOrderHash);
-                expect(filledOrderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(
-                    expectedFilledTakerAssetFilledAmount,
-                );
-                expect(filledOrderInfo.orderStatus).to.be.equal(expectedFilledOrderStatus);
-
-                const expectedCancelledOrderHash = orderHashUtils.getOrderHashHex(cancelledOrder);
-                const expectedCancelledTakerAssetFilledAmount = new BigNumber(0);
-                const expectedCancelledOrderStatus = OrderStatus.CANCELLED;
-                const cancelledOrderInfo = ordersInfo[3];
-                expect(cancelledOrderInfo.orderHash).to.be.equal(expectedCancelledOrderHash);
-                expect(cancelledOrderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(
-                    expectedCancelledTakerAssetFilledAmount,
-                );
-                expect(cancelledOrderInfo.orderStatus).to.be.equal(expectedCancelledOrderStatus);
-
-                const expectedExpiredOrderHash = orderHashUtils.getOrderHashHex(expiredOrder);
-                const expectedExpiredTakerAssetFilledAmount = new BigNumber(0);
-                const expectedExpiredOrderStatus = OrderStatus.EXPIRED;
-                const expiredOrderInfo = ordersInfo[4];
-                expect(expiredOrderInfo.orderHash).to.be.equal(expectedExpiredOrderHash);
-                expect(expiredOrderInfo.orderTakerAssetFilledAmount).to.be.bignumber.equal(
-                    expectedExpiredTakerAssetFilledAmount,
-                );
-                expect(expiredOrderInfo.orderStatus).to.be.equal(expectedExpiredOrderStatus);
-            });
-        });
-    });
-}); // tslint:disable-line:max-file-line-count
diff --git a/contracts/core/test/global_hooks.ts b/contracts/core/test/global_hooks.ts
deleted file mode 100644
index f8ace376a..000000000
--- a/contracts/core/test/global_hooks.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-import { env, EnvVars } from '@0x/dev-utils';
-
-import { coverage, profiler, provider } from '@0x/contracts-test-utils';
-before('start web3 provider', () => {
-    provider.start();
-});
-after('generate coverage report', async () => {
-    if (env.parseBoolean(EnvVars.SolidityCoverage)) {
-        const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
-        await coverageSubprovider.writeCoverageAsync();
-    }
-    if (env.parseBoolean(EnvVars.SolidityProfiler)) {
-        const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
-        await profilerSubprovider.writeProfilerOutputAsync();
-    }
-    provider.stop();
-});
diff --git a/contracts/core/test/multisig/asset_proxy_owner.ts b/contracts/core/test/multisig/asset_proxy_owner.ts
deleted file mode 100644
index daebfb7fb..000000000
--- a/contracts/core/test/multisig/asset_proxy_owner.ts
+++ /dev/null
@@ -1,506 +0,0 @@
-import {
-    chaiSetup,
-    constants,
-    expectContractCallFailedAsync,
-    expectContractCreationFailedAsync,
-    expectTransactionFailedAsync,
-    expectTransactionFailedWithoutReasonAsync,
-    increaseTimeAndMineBlockAsync,
-    provider,
-    sendTransactionResult,
-    txDefaults,
-    web3Wrapper,
-} from '@0x/contracts-test-utils';
-import { BlockchainLifecycle } from '@0x/dev-utils';
-import { RevertReason } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import { LogWithDecodedArgs } from 'ethereum-types';
-
-import {
-    AssetProxyOwnerAssetProxyRegistrationEventArgs,
-    AssetProxyOwnerContract,
-    AssetProxyOwnerExecutionEventArgs,
-    AssetProxyOwnerExecutionFailureEventArgs,
-    AssetProxyOwnerSubmissionEventArgs,
-} from '../../generated-wrappers/asset_proxy_owner';
-import { MixinAuthorizableContract } from '../../generated-wrappers/mixin_authorizable';
-import { TestAssetProxyOwnerContract } from '../../generated-wrappers/test_asset_proxy_owner';
-import { artifacts } from '../../src/artifacts';
-import { AssetProxyOwnerWrapper } from '../utils/asset_proxy_owner_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-// tslint:disable:no-unnecessary-type-assertion
-describe('AssetProxyOwner', () => {
-    let owners: string[];
-    let authorized: string;
-    let notOwner: string;
-    const REQUIRED_APPROVALS = new BigNumber(2);
-    const SECONDS_TIME_LOCKED = new BigNumber(1000000);
-
-    let erc20Proxy: MixinAuthorizableContract;
-    let erc721Proxy: MixinAuthorizableContract;
-    let testAssetProxyOwner: TestAssetProxyOwnerContract;
-    let assetProxyOwnerWrapper: AssetProxyOwnerWrapper;
-
-    before(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    after(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-    before(async () => {
-        const accounts = await web3Wrapper.getAvailableAddressesAsync();
-        owners = [accounts[0], accounts[1]];
-        authorized = accounts[2];
-        notOwner = accounts[3];
-        const initialOwner = accounts[0];
-        erc20Proxy = await MixinAuthorizableContract.deployFrom0xArtifactAsync(
-            artifacts.MixinAuthorizable,
-            provider,
-            txDefaults,
-        );
-        erc721Proxy = await MixinAuthorizableContract.deployFrom0xArtifactAsync(
-            artifacts.MixinAuthorizable,
-            provider,
-            txDefaults,
-        );
-        const defaultAssetProxyContractAddresses: string[] = [];
-        testAssetProxyOwner = await TestAssetProxyOwnerContract.deployFrom0xArtifactAsync(
-            artifacts.TestAssetProxyOwner,
-            provider,
-            txDefaults,
-            owners,
-            defaultAssetProxyContractAddresses,
-            REQUIRED_APPROVALS,
-            SECONDS_TIME_LOCKED,
-        );
-        assetProxyOwnerWrapper = new AssetProxyOwnerWrapper(testAssetProxyOwner, provider);
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.transferOwnership.sendTransactionAsync(testAssetProxyOwner.address, {
-                from: initialOwner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.transferOwnership.sendTransactionAsync(testAssetProxyOwner.address, {
-                from: initialOwner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    });
-    beforeEach(async () => {
-        await blockchainLifecycle.startAsync();
-    });
-    afterEach(async () => {
-        await blockchainLifecycle.revertAsync();
-    });
-
-    describe('constructor', () => {
-        it('should register passed in assetProxyContracts', async () => {
-            const assetProxyContractAddresses = [erc20Proxy.address, erc721Proxy.address];
-            const newMultiSig = await AssetProxyOwnerContract.deployFrom0xArtifactAsync(
-                artifacts.AssetProxyOwner,
-                provider,
-                txDefaults,
-                owners,
-                assetProxyContractAddresses,
-                REQUIRED_APPROVALS,
-                SECONDS_TIME_LOCKED,
-            );
-            const isErc20ProxyRegistered = await newMultiSig.isAssetProxyRegistered.callAsync(erc20Proxy.address);
-            const isErc721ProxyRegistered = await newMultiSig.isAssetProxyRegistered.callAsync(erc721Proxy.address);
-            expect(isErc20ProxyRegistered).to.equal(true);
-            expect(isErc721ProxyRegistered).to.equal(true);
-        });
-        it('should throw if a null address is included in assetProxyContracts', async () => {
-            const assetProxyContractAddresses = [erc20Proxy.address, constants.NULL_ADDRESS];
-            return expectContractCreationFailedAsync(
-                (AssetProxyOwnerContract.deployFrom0xArtifactAsync(
-                    artifacts.AssetProxyOwner,
-                    provider,
-                    txDefaults,
-                    owners,
-                    assetProxyContractAddresses,
-                    REQUIRED_APPROVALS,
-                    SECONDS_TIME_LOCKED,
-                ) as any) as sendTransactionResult,
-                RevertReason.InvalidAssetProxy,
-            );
-        });
-    });
-
-    describe('isFunctionRemoveAuthorizedAddressAtIndex', () => {
-        it('should return false if data is not for removeAuthorizedAddressAtIndex', async () => {
-            const notRemoveAuthorizedAddressData = erc20Proxy.addAuthorizedAddress.getABIEncodedTransactionData(
-                owners[0],
-            );
-
-            const isFunctionRemoveAuthorizedAddressAtIndex = await testAssetProxyOwner.isFunctionRemoveAuthorizedAddressAtIndex.callAsync(
-                notRemoveAuthorizedAddressData,
-            );
-            expect(isFunctionRemoveAuthorizedAddressAtIndex).to.be.false();
-        });
-
-        it('should return true if data is for removeAuthorizedAddressAtIndex', async () => {
-            const index = new BigNumber(0);
-            const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                owners[0],
-                index,
-            );
-            const isFunctionRemoveAuthorizedAddressAtIndex = await testAssetProxyOwner.isFunctionRemoveAuthorizedAddressAtIndex.callAsync(
-                removeAuthorizedAddressAtIndexData,
-            );
-            expect(isFunctionRemoveAuthorizedAddressAtIndex).to.be.true();
-        });
-    });
-
-    describe('registerAssetProxy', () => {
-        it('should throw if not called by multisig', async () => {
-            const isRegistered = true;
-            return expectTransactionFailedWithoutReasonAsync(
-                testAssetProxyOwner.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, isRegistered, {
-                    from: owners[0],
-                }),
-            );
-        });
-
-        it('should register an address if called by multisig after timelock', async () => {
-            const addressToRegister = erc20Proxy.address;
-            const isRegistered = true;
-            const registerAssetProxyData = testAssetProxyOwner.registerAssetProxy.getABIEncodedTransactionData(
-                addressToRegister,
-                isRegistered,
-            );
-            const submitTxRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                testAssetProxyOwner.address,
-                registerAssetProxyData,
-                owners[0],
-            );
-
-            const log = submitTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-            const txId = log.args.transactionId;
-
-            await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-            await increaseTimeAndMineBlockAsync(SECONDS_TIME_LOCKED.toNumber());
-
-            const executeTxRes = await assetProxyOwnerWrapper.executeTransactionAsync(txId, owners[0]);
-            const registerLog = executeTxRes.logs[0] as LogWithDecodedArgs<
-                AssetProxyOwnerAssetProxyRegistrationEventArgs
-            >;
-            expect(registerLog.args.assetProxyContract).to.equal(addressToRegister);
-            expect(registerLog.args.isRegistered).to.equal(isRegistered);
-
-            const isAssetProxyRegistered = await testAssetProxyOwner.isAssetProxyRegistered.callAsync(
-                addressToRegister,
-            );
-            expect(isAssetProxyRegistered).to.equal(isRegistered);
-        });
-
-        it('should fail if registering a null address', async () => {
-            const addressToRegister = constants.NULL_ADDRESS;
-            const isRegistered = true;
-            const registerAssetProxyData = testAssetProxyOwner.registerAssetProxy.getABIEncodedTransactionData(
-                addressToRegister,
-                isRegistered,
-            );
-            const submitTxRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                testAssetProxyOwner.address,
-                registerAssetProxyData,
-                owners[0],
-            );
-            const log = submitTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-            const txId = log.args.transactionId;
-
-            await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-            await increaseTimeAndMineBlockAsync(SECONDS_TIME_LOCKED.toNumber());
-
-            const executeTxRes = await assetProxyOwnerWrapper.executeTransactionAsync(txId, owners[0]);
-            const failureLog = executeTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerExecutionFailureEventArgs>;
-            expect(failureLog.args.transactionId).to.be.bignumber.equal(txId);
-
-            const isAssetProxyRegistered = await testAssetProxyOwner.isAssetProxyRegistered.callAsync(
-                addressToRegister,
-            );
-            expect(isAssetProxyRegistered).to.equal(false);
-        });
-    });
-
-    describe('Calling removeAuthorizedAddressAtIndex', () => {
-        const erc20Index = new BigNumber(0);
-        const erc721Index = new BigNumber(1);
-        before('authorize both proxies and register erc20 proxy', async () => {
-            // Only register ERC20 proxy
-            const addressToRegister = erc20Proxy.address;
-            const isRegistered = true;
-            const registerAssetProxyData = testAssetProxyOwner.registerAssetProxy.getABIEncodedTransactionData(
-                addressToRegister,
-                isRegistered,
-            );
-            const registerAssetProxySubmitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                testAssetProxyOwner.address,
-                registerAssetProxyData,
-                owners[0],
-            );
-            const registerAssetProxySubmitLog = registerAssetProxySubmitRes.logs[0] as LogWithDecodedArgs<
-                AssetProxyOwnerSubmissionEventArgs
-            >;
-
-            const addAuthorizedAddressData = erc20Proxy.addAuthorizedAddress.getABIEncodedTransactionData(authorized);
-            const erc20AddAuthorizedAddressSubmitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                erc20Proxy.address,
-                addAuthorizedAddressData,
-                owners[0],
-            );
-            const erc721AddAuthorizedAddressSubmitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                erc721Proxy.address,
-                addAuthorizedAddressData,
-                owners[0],
-            );
-            const erc20AddAuthorizedAddressSubmitLog = erc20AddAuthorizedAddressSubmitRes.logs[0] as LogWithDecodedArgs<
-                AssetProxyOwnerSubmissionEventArgs
-            >;
-            const erc721AddAuthorizedAddressSubmitLog = erc721AddAuthorizedAddressSubmitRes
-                .logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-
-            const registerAssetProxyTxId = registerAssetProxySubmitLog.args.transactionId;
-            const erc20AddAuthorizedAddressTxId = erc20AddAuthorizedAddressSubmitLog.args.transactionId;
-            const erc721AddAuthorizedAddressTxId = erc721AddAuthorizedAddressSubmitLog.args.transactionId;
-
-            await assetProxyOwnerWrapper.confirmTransactionAsync(registerAssetProxyTxId, owners[1]);
-            await assetProxyOwnerWrapper.confirmTransactionAsync(erc20AddAuthorizedAddressTxId, owners[1]);
-            await assetProxyOwnerWrapper.confirmTransactionAsync(erc721AddAuthorizedAddressTxId, owners[1]);
-            await increaseTimeAndMineBlockAsync(SECONDS_TIME_LOCKED.toNumber());
-            await assetProxyOwnerWrapper.executeTransactionAsync(registerAssetProxyTxId, owners[0]);
-            await assetProxyOwnerWrapper.executeTransactionAsync(erc20AddAuthorizedAddressTxId, owners[0], {
-                gas: constants.MAX_EXECUTE_TRANSACTION_GAS,
-            });
-            await assetProxyOwnerWrapper.executeTransactionAsync(erc721AddAuthorizedAddressTxId, owners[0], {
-                gas: constants.MAX_EXECUTE_TRANSACTION_GAS,
-            });
-        });
-
-        describe('validRemoveAuthorizedAddressAtIndexTx', () => {
-            it('should revert if data is not for removeAuthorizedAddressAtIndex and proxy is registered', async () => {
-                const notRemoveAuthorizedAddressData = erc20Proxy.addAuthorizedAddress.getABIEncodedTransactionData(
-                    authorized,
-                );
-                const submitTxRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    notRemoveAuthorizedAddressData,
-                    owners[0],
-                );
-                const log = submitTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-                return expectContractCallFailedAsync(
-                    testAssetProxyOwner.testValidRemoveAuthorizedAddressAtIndexTx.callAsync(txId),
-                    RevertReason.InvalidFunctionSelector,
-                );
-            });
-
-            it('should return true if data is for removeAuthorizedAddressAtIndex and proxy is registered', async () => {
-                const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc20Index,
-                );
-                const submitTxRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const log = submitTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-                const isValidRemoveAuthorizedAddressAtIndexTx = await testAssetProxyOwner.testValidRemoveAuthorizedAddressAtIndexTx.callAsync(
-                    txId,
-                );
-                expect(isValidRemoveAuthorizedAddressAtIndexTx).to.be.true();
-            });
-
-            it('should revert if data is for removeAuthorizedAddressAtIndex and proxy is not registered', async () => {
-                const removeAuthorizedAddressAtIndexData = erc721Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc721Index,
-                );
-                const submitTxRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc721Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const log = submitTxRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-                return expectContractCallFailedAsync(
-                    testAssetProxyOwner.testValidRemoveAuthorizedAddressAtIndexTx.callAsync(txId),
-                    RevertReason.UnregisteredAssetProxy,
-                );
-            });
-        });
-
-        describe('executeRemoveAuthorizedAddressAtIndex', () => {
-            it('should throw without the required confirmations', async () => {
-                const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc20Index,
-                );
-                const res = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const log = res.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-
-                return expectTransactionFailedAsync(
-                    testAssetProxyOwner.executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(txId, {
-                        from: owners[1],
-                    }),
-                    RevertReason.TxNotFullyConfirmed,
-                );
-            });
-
-            it('should throw if tx destination is not registered', async () => {
-                const removeAuthorizedAddressAtIndexData = erc721Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc721Index,
-                );
-                const res = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc721Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const log = res.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-
-                await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-
-                return expectTransactionFailedAsync(
-                    testAssetProxyOwner.executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(txId, {
-                        from: owners[1],
-                    }),
-                    RevertReason.UnregisteredAssetProxy,
-                );
-            });
-
-            it('should throw if tx data is not for removeAuthorizedAddressAtIndex', async () => {
-                const newAuthorized = owners[1];
-                const addAuthorizedAddressData = erc20Proxy.addAuthorizedAddress.getABIEncodedTransactionData(
-                    newAuthorized,
-                );
-                const res = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    addAuthorizedAddressData,
-                    owners[0],
-                );
-                const log = res.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = log.args.transactionId;
-
-                await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-
-                return expectTransactionFailedAsync(
-                    testAssetProxyOwner.executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(txId, {
-                        from: owners[1],
-                    }),
-                    RevertReason.InvalidFunctionSelector,
-                );
-            });
-
-            it('should execute removeAuthorizedAddressAtIndex for registered address if fully confirmed and called by owner', async () => {
-                const isAuthorizedBefore = await erc20Proxy.authorized.callAsync(authorized);
-                expect(isAuthorizedBefore).to.equal(true);
-
-                const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc20Index,
-                );
-                const submitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const submitLog = submitRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = submitLog.args.transactionId;
-
-                await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-
-                const execRes = await assetProxyOwnerWrapper.executeRemoveAuthorizedAddressAtIndexAsync(
-                    txId,
-                    owners[0],
-                );
-                const execLog = execRes.logs[1] as LogWithDecodedArgs<AssetProxyOwnerExecutionEventArgs>;
-                expect(execLog.args.transactionId).to.be.bignumber.equal(txId);
-
-                const tx = await testAssetProxyOwner.transactions.callAsync(txId);
-                const isExecuted = tx[3];
-                expect(isExecuted).to.equal(true);
-
-                const isAuthorizedAfter = await erc20Proxy.authorized.callAsync(authorized);
-                expect(isAuthorizedAfter).to.equal(false);
-            });
-
-            it('should execute removeAuthorizedAddressAtIndex for registered address if fully confirmed and called by non-owner', async () => {
-                const isAuthorizedBefore = await erc20Proxy.authorized.callAsync(authorized);
-                expect(isAuthorizedBefore).to.equal(true);
-
-                const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc20Index,
-                );
-                const submitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const submitLog = submitRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = submitLog.args.transactionId;
-
-                await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-
-                const execRes = await assetProxyOwnerWrapper.executeRemoveAuthorizedAddressAtIndexAsync(txId, notOwner);
-                const execLog = execRes.logs[1] as LogWithDecodedArgs<AssetProxyOwnerExecutionEventArgs>;
-                expect(execLog.args.transactionId).to.be.bignumber.equal(txId);
-
-                const tx = await testAssetProxyOwner.transactions.callAsync(txId);
-                const isExecuted = tx[3];
-                expect(isExecuted).to.equal(true);
-
-                const isAuthorizedAfter = await erc20Proxy.authorized.callAsync(authorized);
-                expect(isAuthorizedAfter).to.equal(false);
-            });
-
-            it('should throw if already executed', async () => {
-                const removeAuthorizedAddressAtIndexData = erc20Proxy.removeAuthorizedAddressAtIndex.getABIEncodedTransactionData(
-                    authorized,
-                    erc20Index,
-                );
-                const submitRes = await assetProxyOwnerWrapper.submitTransactionAsync(
-                    erc20Proxy.address,
-                    removeAuthorizedAddressAtIndexData,
-                    owners[0],
-                );
-                const submitLog = submitRes.logs[0] as LogWithDecodedArgs<AssetProxyOwnerSubmissionEventArgs>;
-                const txId = submitLog.args.transactionId;
-
-                await assetProxyOwnerWrapper.confirmTransactionAsync(txId, owners[1]);
-
-                const execRes = await assetProxyOwnerWrapper.executeRemoveAuthorizedAddressAtIndexAsync(
-                    txId,
-                    owners[0],
-                );
-                const execLog = execRes.logs[1] as LogWithDecodedArgs<AssetProxyOwnerExecutionEventArgs>;
-                expect(execLog.args.transactionId).to.be.bignumber.equal(txId);
-
-                const tx = await testAssetProxyOwner.transactions.callAsync(txId);
-                const isExecuted = tx[3];
-                expect(isExecuted).to.equal(true);
-
-                return expectTransactionFailedWithoutReasonAsync(
-                    testAssetProxyOwner.executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(txId, {
-                        from: owners[1],
-                    }),
-                );
-            });
-        });
-    });
-});
-// tslint:disable-line max-file-line-count
diff --git a/contracts/core/test/utils/asset_proxy_owner_wrapper.ts b/contracts/core/test/utils/asset_proxy_owner_wrapper.ts
deleted file mode 100644
index df23658d8..000000000
--- a/contracts/core/test/utils/asset_proxy_owner_wrapper.ts
+++ /dev/null
@@ -1,70 +0,0 @@
-import { LogDecoder } from '@0x/contracts-test-utils';
-import { artifacts as tokensArtifacts } from '@0x/contracts-tokens';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
-import * as _ from 'lodash';
-
-import { AssetProxyOwnerContract } from '../../generated-wrappers/asset_proxy_owner';
-import { artifacts } from '../../src/artifacts';
-
-export class AssetProxyOwnerWrapper {
-    private readonly _assetProxyOwner: AssetProxyOwnerContract;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _logDecoder: LogDecoder;
-    constructor(assetproxyOwnerContract: AssetProxyOwnerContract, provider: Provider) {
-        this._assetProxyOwner = assetproxyOwnerContract;
-        this._web3Wrapper = new Web3Wrapper(provider);
-        this._logDecoder = new LogDecoder(this._web3Wrapper, { ...artifacts, ...tokensArtifacts });
-    }
-    public async submitTransactionAsync(
-        destination: string,
-        data: string,
-        from: string,
-        opts: { value?: BigNumber } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const value = _.isUndefined(opts.value) ? new BigNumber(0) : opts.value;
-        const txHash = await this._assetProxyOwner.submitTransaction.sendTransactionAsync(destination, value, data, {
-            from,
-        });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async confirmTransactionAsync(txId: BigNumber, from: string): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._assetProxyOwner.confirmTransaction.sendTransactionAsync(txId, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async revokeConfirmationAsync(txId: BigNumber, from: string): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._assetProxyOwner.revokeConfirmation.sendTransactionAsync(txId, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async executeTransactionAsync(
-        txId: BigNumber,
-        from: string,
-        opts: { gas?: number } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._assetProxyOwner.executeTransaction.sendTransactionAsync(txId, {
-            from,
-            gas: opts.gas,
-        });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async executeRemoveAuthorizedAddressAtIndexAsync(
-        txId: BigNumber,
-        from: string,
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        // tslint:disable-next-line:no-unnecessary-type-assertion
-        const txHash = await (this
-            ._assetProxyOwner as AssetProxyOwnerContract).executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(
-            txId,
-            {
-                from,
-            },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-}
diff --git a/contracts/core/test/utils/asset_wrapper.ts b/contracts/core/test/utils/asset_wrapper.ts
deleted file mode 100644
index e4090ad74..000000000
--- a/contracts/core/test/utils/asset_wrapper.ts
+++ /dev/null
@@ -1,222 +0,0 @@
-import { AbstractAssetWrapper, constants } from '@0x/contracts-test-utils';
-import { assetDataUtils } from '@0x/order-utils';
-import { AssetProxyId } from '@0x/types';
-import { BigNumber, errorUtils } from '@0x/utils';
-import * as _ from 'lodash';
-
-import { ERC20Wrapper } from './erc20_wrapper';
-import { ERC721Wrapper } from './erc721_wrapper';
-
-interface ProxyIdToAssetWrappers {
-    [proxyId: string]: AbstractAssetWrapper;
-}
-
-/**
- * This class abstracts away the differences between ERC20 and ERC721 tokens so that
- * the logic that uses it does not need to care what standard a token belongs to.
- */
-export class AssetWrapper {
-    private readonly _proxyIdToAssetWrappers: ProxyIdToAssetWrappers;
-    constructor(assetWrappers: AbstractAssetWrapper[]) {
-        this._proxyIdToAssetWrappers = {};
-        _.each(assetWrappers, assetWrapper => {
-            const proxyId = assetWrapper.getProxyId();
-            this._proxyIdToAssetWrappers[proxyId] = assetWrapper;
-        });
-    }
-    public async getBalanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
-        const proxyId = assetDataUtils.decodeAssetProxyId(assetData);
-        switch (proxyId) {
-            case AssetProxyId.ERC20: {
-                const erc20Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC20Wrapper;
-                const balance = await erc20Wrapper.getBalanceAsync(userAddress, assetData);
-                return balance;
-            }
-            case AssetProxyId.ERC721: {
-                const assetWrapper = this._proxyIdToAssetWrappers[proxyId] as ERC721Wrapper;
-                const assetProxyData = assetDataUtils.decodeERC721AssetData(assetData);
-                const isOwner = await assetWrapper.isOwnerAsync(
-                    userAddress,
-                    assetProxyData.tokenAddress,
-                    assetProxyData.tokenId,
-                );
-                const balance = isOwner ? new BigNumber(1) : new BigNumber(0);
-                return balance;
-            }
-            default:
-                throw errorUtils.spawnSwitchErr('proxyId', proxyId);
-        }
-    }
-    public async setBalanceAsync(userAddress: string, assetData: string, desiredBalance: BigNumber): Promise<void> {
-        const proxyId = assetDataUtils.decodeAssetProxyId(assetData);
-        switch (proxyId) {
-            case AssetProxyId.ERC20: {
-                const erc20Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC20Wrapper;
-                await erc20Wrapper.setBalanceAsync(userAddress, assetData, desiredBalance);
-                return;
-            }
-            case AssetProxyId.ERC721: {
-                if (!desiredBalance.eq(0) && !desiredBalance.eq(1)) {
-                    throw new Error(`Balance for ERC721 token can only be set to 0 or 1. Got: ${desiredBalance}`);
-                }
-                const erc721Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC721Wrapper;
-                const assetProxyData = assetDataUtils.decodeERC721AssetData(assetData);
-                const doesTokenExist = erc721Wrapper.doesTokenExistAsync(
-                    assetProxyData.tokenAddress,
-                    assetProxyData.tokenId,
-                );
-                if (!doesTokenExist && desiredBalance.eq(1)) {
-                    await erc721Wrapper.mintAsync(assetProxyData.tokenAddress, assetProxyData.tokenId, userAddress);
-                    return;
-                } else if (!doesTokenExist && desiredBalance.eq(0)) {
-                    return; // noop
-                }
-                const tokenOwner = await erc721Wrapper.ownerOfAsync(
-                    assetProxyData.tokenAddress,
-                    assetProxyData.tokenId,
-                );
-                if (userAddress !== tokenOwner && desiredBalance.eq(1)) {
-                    await erc721Wrapper.transferFromAsync(
-                        assetProxyData.tokenAddress,
-                        assetProxyData.tokenId,
-                        tokenOwner,
-                        userAddress,
-                    );
-                } else if (tokenOwner === userAddress && desiredBalance.eq(0)) {
-                    // Transfer token to someone else
-                    const userAddresses = await (erc721Wrapper as any)._web3Wrapper.getAvailableAddressesAsync();
-                    const nonOwner = _.find(userAddresses, a => a !== userAddress);
-                    await erc721Wrapper.transferFromAsync(
-                        assetProxyData.tokenAddress,
-                        assetProxyData.tokenId,
-                        tokenOwner,
-                        nonOwner,
-                    );
-                    return;
-                } else if (
-                    (userAddress !== tokenOwner && desiredBalance.eq(0)) ||
-                    (tokenOwner === userAddress && desiredBalance.eq(1))
-                ) {
-                    return; // noop
-                }
-                break;
-            }
-            default:
-                throw errorUtils.spawnSwitchErr('proxyId', proxyId);
-        }
-    }
-    public async getProxyAllowanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
-        const proxyId = assetDataUtils.decodeAssetProxyId(assetData);
-        switch (proxyId) {
-            case AssetProxyId.ERC20: {
-                const erc20Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC20Wrapper;
-                const allowance = await erc20Wrapper.getProxyAllowanceAsync(userAddress, assetData);
-                return allowance;
-            }
-            case AssetProxyId.ERC721: {
-                const assetWrapper = this._proxyIdToAssetWrappers[proxyId] as ERC721Wrapper;
-                const erc721ProxyData = assetDataUtils.decodeERC721AssetData(assetData);
-                const isProxyApprovedForAll = await assetWrapper.isProxyApprovedForAllAsync(
-                    userAddress,
-                    erc721ProxyData.tokenAddress,
-                );
-                if (isProxyApprovedForAll) {
-                    return constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
-                }
-
-                const isProxyApproved = await assetWrapper.isProxyApprovedAsync(
-                    erc721ProxyData.tokenAddress,
-                    erc721ProxyData.tokenId,
-                );
-                const allowance = isProxyApproved ? new BigNumber(1) : new BigNumber(0);
-                return allowance;
-            }
-            default:
-                throw errorUtils.spawnSwitchErr('proxyId', proxyId);
-        }
-    }
-    public async setProxyAllowanceAsync(
-        userAddress: string,
-        assetData: string,
-        desiredAllowance: BigNumber,
-    ): Promise<void> {
-        const proxyId = assetDataUtils.decodeAssetProxyId(assetData);
-        switch (proxyId) {
-            case AssetProxyId.ERC20: {
-                const erc20Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC20Wrapper;
-                await erc20Wrapper.setAllowanceAsync(userAddress, assetData, desiredAllowance);
-                return;
-            }
-            case AssetProxyId.ERC721: {
-                if (
-                    !desiredAllowance.eq(0) &&
-                    !desiredAllowance.eq(1) &&
-                    !desiredAllowance.eq(constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS)
-                ) {
-                    throw new Error(
-                        `Allowance for ERC721 token can only be set to 0, 1 or 2^256-1. Got: ${desiredAllowance}`,
-                    );
-                }
-                const erc721Wrapper = this._proxyIdToAssetWrappers[proxyId] as ERC721Wrapper;
-                const assetProxyData = assetDataUtils.decodeERC721AssetData(assetData);
-
-                const doesTokenExist = await erc721Wrapper.doesTokenExistAsync(
-                    assetProxyData.tokenAddress,
-                    assetProxyData.tokenId,
-                );
-                if (!doesTokenExist) {
-                    throw new Error(
-                        `Cannot setProxyAllowance on non-existent token: ${assetProxyData.tokenAddress} ${
-                            assetProxyData.tokenId
-                        }`,
-                    );
-                }
-                const isProxyApprovedForAll = await erc721Wrapper.isProxyApprovedForAllAsync(
-                    userAddress,
-                    assetProxyData.tokenAddress,
-                );
-                if (!isProxyApprovedForAll && desiredAllowance.eq(constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS)) {
-                    const isApproved = true;
-                    await erc721Wrapper.approveProxyForAllAsync(
-                        assetProxyData.tokenAddress,
-                        assetProxyData.tokenId,
-                        isApproved,
-                    );
-                } else if (isProxyApprovedForAll && desiredAllowance.eq(0)) {
-                    const isApproved = false;
-                    await erc721Wrapper.approveProxyForAllAsync(
-                        assetProxyData.tokenAddress,
-                        assetProxyData.tokenId,
-                        isApproved,
-                    );
-                } else if (isProxyApprovedForAll && desiredAllowance.eq(constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS)) {
-                    return; // Noop
-                }
-
-                const isProxyApproved = await erc721Wrapper.isProxyApprovedAsync(
-                    assetProxyData.tokenAddress,
-                    assetProxyData.tokenId,
-                );
-                if (!isProxyApproved && desiredAllowance.eq(1)) {
-                    await erc721Wrapper.approveProxyAsync(assetProxyData.tokenAddress, assetProxyData.tokenId);
-                } else if (isProxyApproved && desiredAllowance.eq(0)) {
-                    // Remove approval
-                    await erc721Wrapper.approveAsync(
-                        constants.NULL_ADDRESS,
-                        assetProxyData.tokenAddress,
-                        assetProxyData.tokenId,
-                    );
-                } else if (
-                    (!isProxyApproved && desiredAllowance.eq(0)) ||
-                    (isProxyApproved && desiredAllowance.eq(1))
-                ) {
-                    return; // noop
-                }
-
-                break;
-            }
-            default:
-                throw errorUtils.spawnSwitchErr('proxyId', proxyId);
-        }
-    }
-}
diff --git a/contracts/core/test/utils/erc20_wrapper.ts b/contracts/core/test/utils/erc20_wrapper.ts
deleted file mode 100644
index e5ab0e36c..000000000
--- a/contracts/core/test/utils/erc20_wrapper.ts
+++ /dev/null
@@ -1,179 +0,0 @@
-import { constants, ERC20BalancesByOwner, txDefaults } from '@0x/contracts-test-utils';
-import { artifacts as tokensArtifacts, DummyERC20TokenContract } from '@0x/contracts-tokens';
-import { assetDataUtils } from '@0x/order-utils';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
-import * as _ from 'lodash';
-
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { artifacts } from '../../src/artifacts';
-
-export class ERC20Wrapper {
-    private readonly _tokenOwnerAddresses: string[];
-    private readonly _contractOwnerAddress: string;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
-    private readonly _dummyTokenContracts: DummyERC20TokenContract[];
-    private _proxyContract?: ERC20ProxyContract;
-    private _proxyIdIfExists?: string;
-    /**
-     * Instanitates an ERC20Wrapper
-     * @param provider Web3 provider to use for all JSON RPC requests
-     * @param tokenOwnerAddresses Addresses that we want to endow as owners for dummy ERC20 tokens
-     * @param contractOwnerAddress Desired owner of the contract
-     * Instance of ERC20Wrapper
-     */
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
-        this._dummyTokenContracts = [];
-        this._web3Wrapper = new Web3Wrapper(provider);
-        this._provider = provider;
-        this._tokenOwnerAddresses = tokenOwnerAddresses;
-        this._contractOwnerAddress = contractOwnerAddress;
-    }
-    public async deployDummyTokensAsync(
-        numberToDeploy: number,
-        decimals: BigNumber,
-    ): Promise<DummyERC20TokenContract[]> {
-        for (let i = 0; i < numberToDeploy; i++) {
-            this._dummyTokenContracts.push(
-                await DummyERC20TokenContract.deployFrom0xArtifactAsync(
-                    tokensArtifacts.DummyERC20Token,
-                    this._provider,
-                    txDefaults,
-                    constants.DUMMY_TOKEN_NAME,
-                    constants.DUMMY_TOKEN_SYMBOL,
-                    decimals,
-                    constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-                ),
-            );
-        }
-        return this._dummyTokenContracts;
-    }
-    public async deployProxyAsync(): Promise<ERC20ProxyContract> {
-        this._proxyContract = await ERC20ProxyContract.deployFrom0xArtifactAsync(
-            artifacts.ERC20Proxy,
-            this._provider,
-            txDefaults,
-        );
-        this._proxyIdIfExists = await this._proxyContract.getProxyId.callAsync();
-        return this._proxyContract;
-    }
-    public getProxyId(): string {
-        this._validateProxyContractExistsOrThrow();
-        return this._proxyIdIfExists as string;
-    }
-    public async setBalancesAndAllowancesAsync(): Promise<void> {
-        this._validateDummyTokenContractsExistOrThrow();
-        this._validateProxyContractExistsOrThrow();
-        for (const dummyTokenContract of this._dummyTokenContracts) {
-            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                await this._web3Wrapper.awaitTransactionSuccessAsync(
-                    await dummyTokenContract.setBalance.sendTransactionAsync(
-                        tokenOwnerAddress,
-                        constants.INITIAL_ERC20_BALANCE,
-                        { from: this._contractOwnerAddress },
-                    ),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-                await this._web3Wrapper.awaitTransactionSuccessAsync(
-                    await dummyTokenContract.approve.sendTransactionAsync(
-                        (this._proxyContract as ERC20ProxyContract).address,
-                        constants.INITIAL_ERC20_ALLOWANCE,
-                        { from: tokenOwnerAddress },
-                    ),
-                    constants.AWAIT_TRANSACTION_MINED_MS,
-                );
-            }
-        }
-    }
-    public async getBalanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
-        const tokenContract = this._getTokenContractFromAssetData(assetData);
-        const balance = new BigNumber(await tokenContract.balanceOf.callAsync(userAddress));
-        return balance;
-    }
-    public async setBalanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(assetData);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.setBalance.sendTransactionAsync(userAddress, amount, {
-                from: this._contractOwnerAddress,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async getProxyAllowanceAsync(userAddress: string, assetData: string): Promise<BigNumber> {
-        const tokenContract = this._getTokenContractFromAssetData(assetData);
-        const proxyAddress = (this._proxyContract as ERC20ProxyContract).address;
-        const allowance = new BigNumber(await tokenContract.allowance.callAsync(userAddress, proxyAddress));
-        return allowance;
-    }
-    public async setAllowanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(assetData);
-        const proxyAddress = (this._proxyContract as ERC20ProxyContract).address;
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.approve.sendTransactionAsync(proxyAddress, amount, {
-                from: userAddress,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async getBalancesAsync(): Promise<ERC20BalancesByOwner> {
-        this._validateDummyTokenContractsExistOrThrow();
-        const balancesByOwner: ERC20BalancesByOwner = {};
-        const balances: BigNumber[] = [];
-        const balanceInfo: Array<{ tokenOwnerAddress: string; tokenAddress: string }> = [];
-        for (const dummyTokenContract of this._dummyTokenContracts) {
-            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                balances.push(await dummyTokenContract.balanceOf.callAsync(tokenOwnerAddress));
-                balanceInfo.push({
-                    tokenOwnerAddress,
-                    tokenAddress: dummyTokenContract.address,
-                });
-            }
-        }
-        _.forEach(balances, (balance, balanceIndex) => {
-            const tokenAddress = balanceInfo[balanceIndex].tokenAddress;
-            const tokenOwnerAddress = balanceInfo[balanceIndex].tokenOwnerAddress;
-            if (_.isUndefined(balancesByOwner[tokenOwnerAddress])) {
-                balancesByOwner[tokenOwnerAddress] = {};
-            }
-            const wrappedBalance = new BigNumber(balance);
-            balancesByOwner[tokenOwnerAddress][tokenAddress] = wrappedBalance;
-        });
-        return balancesByOwner;
-    }
-    public addDummyTokenContract(dummy: DummyERC20TokenContract): void {
-        if (!_.isUndefined(this._dummyTokenContracts)) {
-            this._dummyTokenContracts.push(dummy);
-        }
-    }
-    public addTokenOwnerAddress(address: string): void {
-        this._tokenOwnerAddresses.push(address);
-    }
-    public getTokenOwnerAddresses(): string[] {
-        return this._tokenOwnerAddresses;
-    }
-    public getTokenAddresses(): string[] {
-        const tokenAddresses = _.map(this._dummyTokenContracts, dummyTokenContract => dummyTokenContract.address);
-        return tokenAddresses;
-    }
-    private _getTokenContractFromAssetData(assetData: string): DummyERC20TokenContract {
-        const erc20ProxyData = assetDataUtils.decodeERC20AssetData(assetData);
-        const tokenAddress = erc20ProxyData.tokenAddress;
-        const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
-        if (_.isUndefined(tokenContractIfExists)) {
-            throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
-        }
-        return tokenContractIfExists;
-    }
-    private _validateDummyTokenContractsExistOrThrow(): void {
-        if (_.isUndefined(this._dummyTokenContracts)) {
-            throw new Error('Dummy ERC20 tokens not yet deployed, please call "deployDummyTokensAsync"');
-        }
-    }
-    private _validateProxyContractExistsOrThrow(): void {
-        if (_.isUndefined(this._proxyContract)) {
-            throw new Error('ERC20 proxy contract not yet deployed, please call "deployProxyAsync"');
-        }
-    }
-}
diff --git a/contracts/core/test/utils/erc721_wrapper.ts b/contracts/core/test/utils/erc721_wrapper.ts
deleted file mode 100644
index 1f658ce86..000000000
--- a/contracts/core/test/utils/erc721_wrapper.ts
+++ /dev/null
@@ -1,236 +0,0 @@
-import { constants, ERC721TokenIdsByOwner, txDefaults } from '@0x/contracts-test-utils';
-import { artifacts as tokensArtifacts, DummyERC721TokenContract } from '@0x/contracts-tokens';
-import { generatePseudoRandomSalt } from '@0x/order-utils';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
-import * as _ from 'lodash';
-
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { artifacts } from '../../src/artifacts';
-
-export class ERC721Wrapper {
-    private readonly _tokenOwnerAddresses: string[];
-    private readonly _contractOwnerAddress: string;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
-    private readonly _dummyTokenContracts: DummyERC721TokenContract[];
-    private _proxyContract?: ERC721ProxyContract;
-    private _proxyIdIfExists?: string;
-    private _initialTokenIdsByOwner: ERC721TokenIdsByOwner = {};
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
-        this._web3Wrapper = new Web3Wrapper(provider);
-        this._provider = provider;
-        this._dummyTokenContracts = [];
-        this._tokenOwnerAddresses = tokenOwnerAddresses;
-        this._contractOwnerAddress = contractOwnerAddress;
-    }
-    public async deployDummyTokensAsync(): Promise<DummyERC721TokenContract[]> {
-        // tslint:disable-next-line:no-unused-variable
-        for (const i of _.times(constants.NUM_DUMMY_ERC721_TO_DEPLOY)) {
-            this._dummyTokenContracts.push(
-                await DummyERC721TokenContract.deployFrom0xArtifactAsync(
-                    tokensArtifacts.DummyERC721Token,
-                    this._provider,
-                    txDefaults,
-                    constants.DUMMY_TOKEN_NAME,
-                    constants.DUMMY_TOKEN_SYMBOL,
-                ),
-            );
-        }
-        return this._dummyTokenContracts;
-    }
-    public async deployProxyAsync(): Promise<ERC721ProxyContract> {
-        this._proxyContract = await ERC721ProxyContract.deployFrom0xArtifactAsync(
-            artifacts.ERC721Proxy,
-            this._provider,
-            txDefaults,
-        );
-        this._proxyIdIfExists = await this._proxyContract.getProxyId.callAsync();
-        return this._proxyContract;
-    }
-    public getProxyId(): string {
-        this._validateProxyContractExistsOrThrow();
-        return this._proxyIdIfExists as string;
-    }
-    public async setBalancesAndAllowancesAsync(): Promise<void> {
-        this._validateDummyTokenContractsExistOrThrow();
-        this._validateProxyContractExistsOrThrow();
-        this._initialTokenIdsByOwner = {};
-        for (const dummyTokenContract of this._dummyTokenContracts) {
-            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                // tslint:disable-next-line:no-unused-variable
-                for (const i of _.times(constants.NUM_ERC721_TOKENS_TO_MINT)) {
-                    const tokenId = generatePseudoRandomSalt();
-                    await this.mintAsync(dummyTokenContract.address, tokenId, tokenOwnerAddress);
-                    if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress])) {
-                        this._initialTokenIdsByOwner[tokenOwnerAddress] = {
-                            [dummyTokenContract.address]: [],
-                        };
-                    }
-                    if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address])) {
-                        this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address] = [];
-                    }
-                    this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address].push(tokenId);
-
-                    await this.approveProxyAsync(dummyTokenContract.address, tokenId);
-                }
-            }
-        }
-    }
-    public async doesTokenExistAsync(tokenAddress: string, tokenId: BigNumber): Promise<boolean> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const owner = await tokenContract.ownerOf.callAsync(tokenId);
-        const doesExist = owner !== constants.NULL_ADDRESS;
-        return doesExist;
-    }
-    public async approveProxyAsync(tokenAddress: string, tokenId: BigNumber): Promise<void> {
-        const proxyAddress = (this._proxyContract as ERC721ProxyContract).address;
-        await this.approveAsync(proxyAddress, tokenAddress, tokenId);
-    }
-    public async approveProxyForAllAsync(tokenAddress: string, tokenId: BigNumber, isApproved: boolean): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const tokenOwner = await this.ownerOfAsync(tokenAddress, tokenId);
-        const proxyAddress = (this._proxyContract as ERC721ProxyContract).address;
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.setApprovalForAll.sendTransactionAsync(proxyAddress, isApproved, {
-                from: tokenOwner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async approveAsync(to: string, tokenAddress: string, tokenId: BigNumber): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const tokenOwner = await this.ownerOfAsync(tokenAddress, tokenId);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.approve.sendTransactionAsync(to, tokenId, {
-                from: tokenOwner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async transferFromAsync(
-        tokenAddress: string,
-        tokenId: BigNumber,
-        currentOwner: string,
-        userAddress: string,
-    ): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.transferFrom.sendTransactionAsync(currentOwner, userAddress, tokenId, {
-                from: currentOwner,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async mintAsync(tokenAddress: string, tokenId: BigNumber, userAddress: string): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.mint.sendTransactionAsync(userAddress, tokenId, {
-                from: this._contractOwnerAddress,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async burnAsync(tokenAddress: string, tokenId: BigNumber, owner: string): Promise<void> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.burn.sendTransactionAsync(owner, tokenId, {
-                from: this._contractOwnerAddress,
-            }),
-            constants.AWAIT_TRANSACTION_MINED_MS,
-        );
-    }
-    public async ownerOfAsync(tokenAddress: string, tokenId: BigNumber): Promise<string> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const owner = await tokenContract.ownerOf.callAsync(tokenId);
-        return owner;
-    }
-    public async isOwnerAsync(userAddress: string, tokenAddress: string, tokenId: BigNumber): Promise<boolean> {
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const tokenOwner = await tokenContract.ownerOf.callAsync(tokenId);
-        const isOwner = tokenOwner === userAddress;
-        return isOwner;
-    }
-    public async isProxyApprovedForAllAsync(userAddress: string, tokenAddress: string): Promise<boolean> {
-        this._validateProxyContractExistsOrThrow();
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const operator = (this._proxyContract as ERC721ProxyContract).address;
-        const didApproveAll = await tokenContract.isApprovedForAll.callAsync(userAddress, operator);
-        return didApproveAll;
-    }
-    public async isProxyApprovedAsync(tokenAddress: string, tokenId: BigNumber): Promise<boolean> {
-        this._validateProxyContractExistsOrThrow();
-        const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        const approvedAddress = await tokenContract.getApproved.callAsync(tokenId);
-        const proxyAddress = (this._proxyContract as ERC721ProxyContract).address;
-        const isProxyAnApprovedOperator = approvedAddress === proxyAddress;
-        return isProxyAnApprovedOperator;
-    }
-    public async getBalancesAsync(): Promise<ERC721TokenIdsByOwner> {
-        this._validateDummyTokenContractsExistOrThrow();
-        this._validateBalancesAndAllowancesSetOrThrow();
-        const tokenIdsByOwner: ERC721TokenIdsByOwner = {};
-        const tokenOwnerAddresses: string[] = [];
-        const tokenInfo: Array<{ tokenId: BigNumber; tokenAddress: string }> = [];
-        for (const dummyTokenContract of this._dummyTokenContracts) {
-            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                const initialTokenOwnerIds = this._initialTokenIdsByOwner[tokenOwnerAddress][
-                    dummyTokenContract.address
-                ];
-                for (const tokenId of initialTokenOwnerIds) {
-                    tokenOwnerAddresses.push(await dummyTokenContract.ownerOf.callAsync(tokenId));
-                    tokenInfo.push({
-                        tokenId,
-                        tokenAddress: dummyTokenContract.address,
-                    });
-                }
-            }
-        }
-        _.forEach(tokenOwnerAddresses, (tokenOwnerAddress, ownerIndex) => {
-            const tokenAddress = tokenInfo[ownerIndex].tokenAddress;
-            const tokenId = tokenInfo[ownerIndex].tokenId;
-            if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress])) {
-                tokenIdsByOwner[tokenOwnerAddress] = {
-                    [tokenAddress]: [],
-                };
-            }
-            if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress][tokenAddress])) {
-                tokenIdsByOwner[tokenOwnerAddress][tokenAddress] = [];
-            }
-            tokenIdsByOwner[tokenOwnerAddress][tokenAddress].push(tokenId);
-        });
-        return tokenIdsByOwner;
-    }
-    public getTokenOwnerAddresses(): string[] {
-        return this._tokenOwnerAddresses;
-    }
-    public getTokenAddresses(): string[] {
-        const tokenAddresses = _.map(this._dummyTokenContracts, dummyTokenContract => dummyTokenContract.address);
-        return tokenAddresses;
-    }
-    private _getTokenContractFromAssetData(tokenAddress: string): DummyERC721TokenContract {
-        const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
-        if (_.isUndefined(tokenContractIfExists)) {
-            throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
-        }
-        return tokenContractIfExists;
-    }
-    private _validateDummyTokenContractsExistOrThrow(): void {
-        if (_.isUndefined(this._dummyTokenContracts)) {
-            throw new Error('Dummy ERC721 tokens not yet deployed, please call "deployDummyTokensAsync"');
-        }
-    }
-    private _validateProxyContractExistsOrThrow(): void {
-        if (_.isUndefined(this._proxyContract)) {
-            throw new Error('ERC721 proxy contract not yet deployed, please call "deployProxyAsync"');
-        }
-    }
-    private _validateBalancesAndAllowancesSetOrThrow(): void {
-        if (_.keys(this._initialTokenIdsByOwner).length === 0) {
-            throw new Error(
-                'Dummy ERC721 balances and allowances not yet set, please call "setBalancesAndAllowancesAsync"',
-            );
-        }
-    }
-}
diff --git a/contracts/core/test/utils/exchange_wrapper.ts b/contracts/core/test/utils/exchange_wrapper.ts
deleted file mode 100644
index 075d2cb96..000000000
--- a/contracts/core/test/utils/exchange_wrapper.ts
+++ /dev/null
@@ -1,281 +0,0 @@
-import {
-    FillResults,
-    formatters,
-    LogDecoder,
-    OrderInfo,
-    orderUtils,
-    SignedTransaction,
-} from '@0x/contracts-test-utils';
-import { artifacts as tokensArtifacts } from '@0x/contracts-tokens';
-import { SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
-
-import { ExchangeContract } from '../../generated-wrappers/exchange';
-import { artifacts } from '../../src/artifacts';
-
-export class ExchangeWrapper {
-    private readonly _exchange: ExchangeContract;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _logDecoder: LogDecoder;
-    constructor(exchangeContract: ExchangeContract, provider: Provider) {
-        this._exchange = exchangeContract;
-        this._web3Wrapper = new Web3Wrapper(provider);
-        this._logDecoder = new LogDecoder(this._web3Wrapper, { ...artifacts, ...tokensArtifacts });
-    }
-    public async fillOrderAsync(
-        signedOrder: SignedOrder,
-        from: string,
-        opts: { takerAssetFillAmount?: BigNumber } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = orderUtils.createFill(signedOrder, opts.takerAssetFillAmount);
-        const txHash = await this._exchange.fillOrder.sendTransactionAsync(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-            { from },
-        );
-        const txReceipt = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return txReceipt;
-    }
-    public async cancelOrderAsync(signedOrder: SignedOrder, from: string): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = orderUtils.createCancel(signedOrder);
-        const txHash = await this._exchange.cancelOrder.sendTransactionAsync(params.order, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async fillOrKillOrderAsync(
-        signedOrder: SignedOrder,
-        from: string,
-        opts: { takerAssetFillAmount?: BigNumber } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = orderUtils.createFill(signedOrder, opts.takerAssetFillAmount);
-        const txHash = await this._exchange.fillOrKillOrder.sendTransactionAsync(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async fillOrderNoThrowAsync(
-        signedOrder: SignedOrder,
-        from: string,
-        opts: { takerAssetFillAmount?: BigNumber; gas?: number } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = orderUtils.createFill(signedOrder, opts.takerAssetFillAmount);
-        const txHash = await this._exchange.fillOrderNoThrow.sendTransactionAsync(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-            { from, gas: opts.gas },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async batchFillOrdersAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { takerAssetFillAmounts?: BigNumber[] } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createBatchFill(orders, opts.takerAssetFillAmounts);
-        const txHash = await this._exchange.batchFillOrders.sendTransactionAsync(
-            params.orders,
-            params.takerAssetFillAmounts,
-            params.signatures,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async batchFillOrKillOrdersAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { takerAssetFillAmounts?: BigNumber[] } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createBatchFill(orders, opts.takerAssetFillAmounts);
-        const txHash = await this._exchange.batchFillOrKillOrders.sendTransactionAsync(
-            params.orders,
-            params.takerAssetFillAmounts,
-            params.signatures,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async batchFillOrdersNoThrowAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { takerAssetFillAmounts?: BigNumber[]; gas?: number } = {},
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createBatchFill(orders, opts.takerAssetFillAmounts);
-        const txHash = await this._exchange.batchFillOrdersNoThrow.sendTransactionAsync(
-            params.orders,
-            params.takerAssetFillAmounts,
-            params.signatures,
-            { from, gas: opts.gas },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async marketSellOrdersAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { takerAssetFillAmount: BigNumber },
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createMarketSellOrders(orders, opts.takerAssetFillAmount);
-        const txHash = await this._exchange.marketSellOrders.sendTransactionAsync(
-            params.orders,
-            params.takerAssetFillAmount,
-            params.signatures,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async marketSellOrdersNoThrowAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { takerAssetFillAmount: BigNumber; gas?: number },
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createMarketSellOrders(orders, opts.takerAssetFillAmount);
-        const txHash = await this._exchange.marketSellOrdersNoThrow.sendTransactionAsync(
-            params.orders,
-            params.takerAssetFillAmount,
-            params.signatures,
-            { from, gas: opts.gas },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async marketBuyOrdersAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { makerAssetFillAmount: BigNumber },
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createMarketBuyOrders(orders, opts.makerAssetFillAmount);
-        const txHash = await this._exchange.marketBuyOrders.sendTransactionAsync(
-            params.orders,
-            params.makerAssetFillAmount,
-            params.signatures,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async marketBuyOrdersNoThrowAsync(
-        orders: SignedOrder[],
-        from: string,
-        opts: { makerAssetFillAmount: BigNumber; gas?: number },
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createMarketBuyOrders(orders, opts.makerAssetFillAmount);
-        const txHash = await this._exchange.marketBuyOrdersNoThrow.sendTransactionAsync(
-            params.orders,
-            params.makerAssetFillAmount,
-            params.signatures,
-            { from, gas: opts.gas },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async batchCancelOrdersAsync(
-        orders: SignedOrder[],
-        from: string,
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = formatters.createBatchCancel(orders);
-        const txHash = await this._exchange.batchCancelOrders.sendTransactionAsync(params.orders, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async cancelOrdersUpToAsync(salt: BigNumber, from: string): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._exchange.cancelOrdersUpTo.sendTransactionAsync(salt, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async registerAssetProxyAsync(
-        assetProxyAddress: string,
-        from: string,
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._exchange.registerAssetProxy.sendTransactionAsync(assetProxyAddress, { from });
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async executeTransactionAsync(
-        signedTx: SignedTransaction,
-        from: string,
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const txHash = await this._exchange.executeTransaction.sendTransactionAsync(
-            signedTx.salt,
-            signedTx.signerAddress,
-            signedTx.data,
-            signedTx.signature,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async getTakerAssetFilledAmountAsync(orderHashHex: string): Promise<BigNumber> {
-        const filledAmount = await this._exchange.filled.callAsync(orderHashHex);
-        return filledAmount;
-    }
-    public async isCancelledAsync(orderHashHex: string): Promise<boolean> {
-        const isCancelled = await this._exchange.cancelled.callAsync(orderHashHex);
-        return isCancelled;
-    }
-    public async getOrderEpochAsync(makerAddress: string, senderAddress: string): Promise<BigNumber> {
-        const orderEpoch = await this._exchange.orderEpoch.callAsync(makerAddress, senderAddress);
-        return orderEpoch;
-    }
-    public async getOrderInfoAsync(signedOrder: SignedOrder): Promise<OrderInfo> {
-        const orderInfo = (await this._exchange.getOrderInfo.callAsync(signedOrder)) as OrderInfo;
-        return orderInfo;
-    }
-    public async getOrdersInfoAsync(signedOrders: SignedOrder[]): Promise<OrderInfo[]> {
-        const ordersInfo = (await this._exchange.getOrdersInfo.callAsync(signedOrders)) as OrderInfo[];
-        return ordersInfo;
-    }
-    public async matchOrdersAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        from: string,
-    ): Promise<TransactionReceiptWithDecodedLogs> {
-        const params = orderUtils.createMatchOrders(signedOrderLeft, signedOrderRight);
-        const txHash = await this._exchange.matchOrders.sendTransactionAsync(
-            params.left,
-            params.right,
-            params.leftSignature,
-            params.rightSignature,
-            { from },
-        );
-        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(txHash);
-        return tx;
-    }
-    public async getFillOrderResultsAsync(
-        signedOrder: SignedOrder,
-        from: string,
-        opts: { takerAssetFillAmount?: BigNumber } = {},
-    ): Promise<FillResults> {
-        const params = orderUtils.createFill(signedOrder, opts.takerAssetFillAmount);
-        const fillResults = await this._exchange.fillOrder.callAsync(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-            { from },
-        );
-        return fillResults;
-    }
-    public abiEncodeFillOrder(signedOrder: SignedOrder, opts: { takerAssetFillAmount?: BigNumber } = {}): string {
-        const params = orderUtils.createFill(signedOrder, opts.takerAssetFillAmount);
-        const data = this._exchange.fillOrder.getABIEncodedTransactionData(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-        );
-        return data;
-    }
-    public getExchangeAddress(): string {
-        return this._exchange.address;
-    }
-}
diff --git a/contracts/core/test/utils/fill_order_combinatorial_utils.ts b/contracts/core/test/utils/fill_order_combinatorial_utils.ts
deleted file mode 100644
index 5d0ea07a8..000000000
--- a/contracts/core/test/utils/fill_order_combinatorial_utils.ts
+++ /dev/null
@@ -1,928 +0,0 @@
-import { artifacts as libsArtifacts, TestLibsContract } from '@0x/contracts-libs';
-import {
-    AllowanceAmountScenario,
-    AssetDataScenario,
-    BalanceAmountScenario,
-    chaiSetup,
-    constants,
-    expectTransactionFailedAsync,
-    ExpirationTimeSecondsScenario,
-    FeeRecipientAddressScenario,
-    FillScenario,
-    OrderAssetAmountScenario,
-    orderUtils,
-    signingUtils,
-    TakerAssetFillAmountScenario,
-    TakerScenario,
-    TraderStateScenario,
-} from '@0x/contracts-test-utils';
-import {
-    assetDataUtils,
-    BalanceAndProxyAllowanceLazyStore,
-    ExchangeTransferSimulator,
-    orderHashUtils,
-    OrderStateUtils,
-    OrderValidationUtils,
-} from '@0x/order-utils';
-import { AssetProxyId, RevertReason, SignatureType, SignedOrder } from '@0x/types';
-import { BigNumber, errorUtils, logUtils } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import * as chai from 'chai';
-import { LogWithDecodedArgs, Provider, TxData } from 'ethereum-types';
-import * as _ from 'lodash';
-import 'make-promises-safe';
-
-import { ExchangeContract, ExchangeFillEventArgs } from '../../generated-wrappers/exchange';
-import { artifacts } from '../../src/artifacts';
-
-import { AssetWrapper } from './asset_wrapper';
-import { ERC20Wrapper } from './erc20_wrapper';
-import { ERC721Wrapper } from './erc721_wrapper';
-import { ExchangeWrapper } from './exchange_wrapper';
-import { OrderFactoryFromScenario } from './order_factory_from_scenario';
-import { SimpleAssetBalanceAndProxyAllowanceFetcher } from './simple_asset_balance_and_proxy_allowance_fetcher';
-import { SimpleOrderFilledCancelledFetcher } from './simple_order_filled_cancelled_fetcher';
-
-chaiSetup.configure();
-const expect = chai.expect;
-
-/**
- * Instantiates a new instance of FillOrderCombinatorialUtils. Since this method has some
- * required async setup, a factory method is required.
- * @param web3Wrapper Web3Wrapper instance
- * @param txDefaults Default Ethereum tx options
- * @return FillOrderCombinatorialUtils instance
- */
-export async function fillOrderCombinatorialUtilsFactoryAsync(
-    web3Wrapper: Web3Wrapper,
-    txDefaults: Partial<TxData>,
-): Promise<FillOrderCombinatorialUtils> {
-    const accounts = await web3Wrapper.getAvailableAddressesAsync();
-    const userAddresses = _.slice(accounts, 0, 5);
-    const [ownerAddress, makerAddress, takerAddress] = userAddresses;
-    const makerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[userAddresses.indexOf(makerAddress)];
-
-    const provider = web3Wrapper.getProvider();
-    const erc20Wrapper = new ERC20Wrapper(provider, userAddresses, ownerAddress);
-    const erc721Wrapper = new ERC721Wrapper(provider, userAddresses, ownerAddress);
-
-    const erc20EighteenDecimalTokenCount = 3;
-    const eighteenDecimals = new BigNumber(18);
-    const [
-        erc20EighteenDecimalTokenA,
-        erc20EighteenDecimalTokenB,
-        zrxToken,
-    ] = await erc20Wrapper.deployDummyTokensAsync(erc20EighteenDecimalTokenCount, eighteenDecimals);
-    const zrxAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
-
-    const erc20FiveDecimalTokenCount = 2;
-    const fiveDecimals = new BigNumber(5);
-    const [erc20FiveDecimalTokenA, erc20FiveDecimalTokenB] = await erc20Wrapper.deployDummyTokensAsync(
-        erc20FiveDecimalTokenCount,
-        fiveDecimals,
-    );
-    const zeroDecimals = new BigNumber(0);
-    const erc20ZeroDecimalTokenCount = 2;
-    const [erc20ZeroDecimalTokenA, erc20ZeroDecimalTokenB] = await erc20Wrapper.deployDummyTokensAsync(
-        erc20ZeroDecimalTokenCount,
-        zeroDecimals,
-    );
-    const erc20Proxy = await erc20Wrapper.deployProxyAsync();
-    await erc20Wrapper.setBalancesAndAllowancesAsync();
-
-    const [erc721Token] = await erc721Wrapper.deployDummyTokensAsync();
-    const erc721Proxy = await erc721Wrapper.deployProxyAsync();
-    await erc721Wrapper.setBalancesAndAllowancesAsync();
-    const erc721Balances = await erc721Wrapper.getBalancesAsync();
-
-    const assetWrapper = new AssetWrapper([erc20Wrapper, erc721Wrapper]);
-
-    const exchangeContract = await ExchangeContract.deployFrom0xArtifactAsync(
-        artifacts.Exchange,
-        provider,
-        txDefaults,
-        zrxAssetData,
-    );
-    const exchangeWrapper = new ExchangeWrapper(exchangeContract, provider);
-    await exchangeWrapper.registerAssetProxyAsync(erc20Proxy.address, ownerAddress);
-    await exchangeWrapper.registerAssetProxyAsync(erc721Proxy.address, ownerAddress);
-
-    await web3Wrapper.awaitTransactionSuccessAsync(
-        await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchangeContract.address, {
-            from: ownerAddress,
-        }),
-        constants.AWAIT_TRANSACTION_MINED_MS,
-    );
-    await web3Wrapper.awaitTransactionSuccessAsync(
-        await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(exchangeContract.address, {
-            from: ownerAddress,
-        }),
-        constants.AWAIT_TRANSACTION_MINED_MS,
-    );
-
-    const orderFactory = new OrderFactoryFromScenario(
-        userAddresses,
-        zrxToken.address,
-        [erc20EighteenDecimalTokenA.address, erc20EighteenDecimalTokenB.address],
-        [erc20FiveDecimalTokenA.address, erc20FiveDecimalTokenB.address],
-        [erc20ZeroDecimalTokenA.address, erc20ZeroDecimalTokenB.address],
-        erc721Token,
-        erc721Balances,
-        exchangeContract.address,
-    );
-
-    const testLibsContract = await TestLibsContract.deployFrom0xArtifactAsync(
-        libsArtifacts.TestLibs,
-        provider,
-        txDefaults,
-    );
-
-    const fillOrderCombinatorialUtils = new FillOrderCombinatorialUtils(
-        orderFactory,
-        ownerAddress,
-        makerAddress,
-        makerPrivateKey,
-        takerAddress,
-        zrxAssetData,
-        exchangeWrapper,
-        assetWrapper,
-        testLibsContract,
-    );
-    return fillOrderCombinatorialUtils;
-}
-
-export class FillOrderCombinatorialUtils {
-    public orderFactory: OrderFactoryFromScenario;
-    public ownerAddress: string;
-    public makerAddress: string;
-    public makerPrivateKey: Buffer;
-    public takerAddress: string;
-    public zrxAssetData: string;
-    public exchangeWrapper: ExchangeWrapper;
-    public assetWrapper: AssetWrapper;
-    public testLibsContract: TestLibsContract;
-    public static generateFillOrderCombinations(): FillScenario[] {
-        const takerScenarios = [
-            TakerScenario.Unspecified,
-            // TakerScenario.CorrectlySpecified,
-            // TakerScenario.IncorrectlySpecified,
-        ];
-        const feeRecipientScenarios = [
-            FeeRecipientAddressScenario.EthUserAddress,
-            // FeeRecipientAddressScenario.BurnAddress,
-        ];
-        const makerAssetAmountScenario = [
-            OrderAssetAmountScenario.Large,
-            // OrderAssetAmountScenario.Zero,
-            // OrderAssetAmountScenario.Small,
-        ];
-        const takerAssetAmountScenario = [
-            OrderAssetAmountScenario.Large,
-            // OrderAssetAmountScenario.Zero,
-            // OrderAssetAmountScenario.Small,
-        ];
-        const makerFeeScenario = [
-            OrderAssetAmountScenario.Large,
-            // OrderAssetAmountScenario.Small,
-            // OrderAssetAmountScenario.Zero,
-        ];
-        const takerFeeScenario = [
-            OrderAssetAmountScenario.Large,
-            // OrderAssetAmountScenario.Small,
-            // OrderAssetAmountScenario.Zero,
-        ];
-        const expirationTimeSecondsScenario = [
-            ExpirationTimeSecondsScenario.InFuture,
-            ExpirationTimeSecondsScenario.InPast,
-        ];
-        const makerAssetDataScenario = [
-            AssetDataScenario.ERC20FiveDecimals,
-            AssetDataScenario.ERC20NonZRXEighteenDecimals,
-            AssetDataScenario.ERC721,
-            AssetDataScenario.ZRXFeeToken,
-        ];
-        const takerAssetDataScenario = [
-            AssetDataScenario.ERC20FiveDecimals,
-            AssetDataScenario.ERC20NonZRXEighteenDecimals,
-            AssetDataScenario.ERC721,
-            AssetDataScenario.ZRXFeeToken,
-        ];
-        const takerAssetFillAmountScenario = [
-            TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount,
-            // TakerAssetFillAmountScenario.GreaterThanRemainingFillableTakerAssetAmount,
-            // TakerAssetFillAmountScenario.LessThanRemainingFillableTakerAssetAmount,
-        ];
-        const makerAssetBalanceScenario = [
-            BalanceAmountScenario.Higher,
-            // BalanceAmountScenario.Exact,
-            // BalanceAmountScenario.TooLow,
-        ];
-        const makerAssetAllowanceScenario = [
-            AllowanceAmountScenario.Higher,
-            // AllowanceAmountScenario.Exact,
-            // AllowanceAmountScenario.TooLow,
-            // AllowanceAmountScenario.Unlimited,
-        ];
-        const makerZRXBalanceScenario = [
-            BalanceAmountScenario.Higher,
-            // BalanceAmountScenario.Exact,
-            // BalanceAmountScenario.TooLow,
-        ];
-        const makerZRXAllowanceScenario = [
-            AllowanceAmountScenario.Higher,
-            // AllowanceAmountScenario.Exact,
-            // AllowanceAmountScenario.TooLow,
-            // AllowanceAmountScenario.Unlimited,
-        ];
-        const takerAssetBalanceScenario = [
-            BalanceAmountScenario.Higher,
-            // BalanceAmountScenario.Exact,
-            // BalanceAmountScenario.TooLow,
-        ];
-        const takerAssetAllowanceScenario = [
-            AllowanceAmountScenario.Higher,
-            // AllowanceAmountScenario.Exact,
-            // AllowanceAmountScenario.TooLow,
-            // AllowanceAmountScenario.Unlimited,
-        ];
-        const takerZRXBalanceScenario = [
-            BalanceAmountScenario.Higher,
-            // BalanceAmountScenario.Exact,
-            // BalanceAmountScenario.TooLow,
-        ];
-        const takerZRXAllowanceScenario = [
-            AllowanceAmountScenario.Higher,
-            // AllowanceAmountScenario.Exact,
-            // AllowanceAmountScenario.TooLow,
-            // AllowanceAmountScenario.Unlimited,
-        ];
-        const fillScenarioArrays = FillOrderCombinatorialUtils._getAllCombinations([
-            takerScenarios,
-            feeRecipientScenarios,
-            makerAssetAmountScenario,
-            takerAssetAmountScenario,
-            makerFeeScenario,
-            takerFeeScenario,
-            expirationTimeSecondsScenario,
-            makerAssetDataScenario,
-            takerAssetDataScenario,
-            takerAssetFillAmountScenario,
-            makerAssetBalanceScenario,
-            makerAssetAllowanceScenario,
-            makerZRXBalanceScenario,
-            makerZRXAllowanceScenario,
-            takerAssetBalanceScenario,
-            takerAssetAllowanceScenario,
-            takerZRXBalanceScenario,
-            takerZRXAllowanceScenario,
-        ]);
-
-        const fillScenarios = _.map(fillScenarioArrays, fillScenarioArray => {
-            // tslint:disable:custom-no-magic-numbers
-            const fillScenario: FillScenario = {
-                orderScenario: {
-                    takerScenario: fillScenarioArray[0] as TakerScenario,
-                    feeRecipientScenario: fillScenarioArray[1] as FeeRecipientAddressScenario,
-                    makerAssetAmountScenario: fillScenarioArray[2] as OrderAssetAmountScenario,
-                    takerAssetAmountScenario: fillScenarioArray[3] as OrderAssetAmountScenario,
-                    makerFeeScenario: fillScenarioArray[4] as OrderAssetAmountScenario,
-                    takerFeeScenario: fillScenarioArray[5] as OrderAssetAmountScenario,
-                    expirationTimeSecondsScenario: fillScenarioArray[6] as ExpirationTimeSecondsScenario,
-                    makerAssetDataScenario: fillScenarioArray[7] as AssetDataScenario,
-                    takerAssetDataScenario: fillScenarioArray[8] as AssetDataScenario,
-                },
-                takerAssetFillAmountScenario: fillScenarioArray[9] as TakerAssetFillAmountScenario,
-                makerStateScenario: {
-                    traderAssetBalance: fillScenarioArray[10] as BalanceAmountScenario,
-                    traderAssetAllowance: fillScenarioArray[11] as AllowanceAmountScenario,
-                    zrxFeeBalance: fillScenarioArray[12] as BalanceAmountScenario,
-                    zrxFeeAllowance: fillScenarioArray[13] as AllowanceAmountScenario,
-                },
-                takerStateScenario: {
-                    traderAssetBalance: fillScenarioArray[14] as BalanceAmountScenario,
-                    traderAssetAllowance: fillScenarioArray[15] as AllowanceAmountScenario,
-                    zrxFeeBalance: fillScenarioArray[16] as BalanceAmountScenario,
-                    zrxFeeAllowance: fillScenarioArray[17] as AllowanceAmountScenario,
-                },
-            };
-            // tslint:enable:custom-no-magic-numbers
-            return fillScenario;
-        });
-
-        return fillScenarios;
-    }
-    /**
-     * Recursive implementation of generating all combinations of the supplied
-     * string-containing arrays.
-     */
-    private static _getAllCombinations(arrays: string[][]): string[][] {
-        // Base case
-        if (arrays.length === 1) {
-            const remainingValues = _.map(arrays[0], val => {
-                return [val];
-            });
-            return remainingValues;
-        } else {
-            const result = [];
-            const restOfArrays = arrays.slice(1);
-            const allCombinationsOfRemaining = FillOrderCombinatorialUtils._getAllCombinations(restOfArrays); // recur with the rest of array
-            // tslint:disable:prefer-for-of
-            for (let i = 0; i < allCombinationsOfRemaining.length; i++) {
-                for (let j = 0; j < arrays[0].length; j++) {
-                    result.push([arrays[0][j], ...allCombinationsOfRemaining[i]]);
-                }
-            }
-            // tslint:enable:prefer-for-of
-            return result;
-        }
-    }
-    constructor(
-        orderFactory: OrderFactoryFromScenario,
-        ownerAddress: string,
-        makerAddress: string,
-        makerPrivateKey: Buffer,
-        takerAddress: string,
-        zrxAssetData: string,
-        exchangeWrapper: ExchangeWrapper,
-        assetWrapper: AssetWrapper,
-        testLibsContract: TestLibsContract,
-    ) {
-        this.orderFactory = orderFactory;
-        this.ownerAddress = ownerAddress;
-        this.makerAddress = makerAddress;
-        this.makerPrivateKey = makerPrivateKey;
-        this.takerAddress = takerAddress;
-        this.zrxAssetData = zrxAssetData;
-        this.exchangeWrapper = exchangeWrapper;
-        this.assetWrapper = assetWrapper;
-        this.testLibsContract = testLibsContract;
-    }
-    public async testFillOrderScenarioAsync(
-        provider: Provider,
-        fillScenario: FillScenario,
-        isVerbose: boolean = false,
-    ): Promise<void> {
-        // 1. Generate order
-        const order = this.orderFactory.generateOrder(fillScenario.orderScenario);
-
-        // 2. Sign order
-        const orderHashBuff = orderHashUtils.getOrderHashBuffer(order);
-        const signature = signingUtils.signMessage(orderHashBuff, this.makerPrivateKey, SignatureType.EthSign);
-        const signedOrder = {
-            ...order,
-            signature: `0x${signature.toString('hex')}`,
-        };
-
-        const balanceAndProxyAllowanceFetcher = new SimpleAssetBalanceAndProxyAllowanceFetcher(this.assetWrapper);
-        const orderFilledCancelledFetcher = new SimpleOrderFilledCancelledFetcher(
-            this.exchangeWrapper,
-            this.zrxAssetData,
-        );
-
-        // 3. Figure out fill amount
-        const takerAssetFillAmount = await this._getTakerAssetFillAmountAsync(
-            signedOrder,
-            fillScenario.takerAssetFillAmountScenario,
-            balanceAndProxyAllowanceFetcher,
-            orderFilledCancelledFetcher,
-        );
-
-        // 4. Permutate the maker and taker balance/allowance scenarios
-        await this._modifyTraderStateAsync(
-            fillScenario.makerStateScenario,
-            fillScenario.takerStateScenario,
-            signedOrder,
-            takerAssetFillAmount,
-        );
-
-        // 5. If I fill it by X, what are the resulting balances/allowances/filled amounts expected?
-        const orderValidationUtils = new OrderValidationUtils(orderFilledCancelledFetcher, provider);
-        const lazyStore = new BalanceAndProxyAllowanceLazyStore(balanceAndProxyAllowanceFetcher);
-        const exchangeTransferSimulator = new ExchangeTransferSimulator(lazyStore);
-
-        let fillRevertReasonIfExists;
-        try {
-            await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                exchangeTransferSimulator,
-                provider,
-                signedOrder,
-                takerAssetFillAmount,
-                this.takerAddress,
-                this.zrxAssetData,
-            );
-            if (isVerbose) {
-                logUtils.log(`Expecting fillOrder to succeed.`);
-            }
-        } catch (err) {
-            fillRevertReasonIfExists = err.message;
-            if (isVerbose) {
-                logUtils.log(`Expecting fillOrder to fail with:`);
-                logUtils.log(err);
-            }
-        }
-
-        // 6. Fill the order
-        await this._fillOrderAndAssertOutcomeAsync(
-            signedOrder,
-            takerAssetFillAmount,
-            lazyStore,
-            fillRevertReasonIfExists,
-        );
-
-        await this._abiEncodeFillOrderAndAssertOutcomeAsync(signedOrder, takerAssetFillAmount);
-    }
-    private async _fillOrderAndAssertOutcomeAsync(
-        signedOrder: SignedOrder,
-        takerAssetFillAmount: BigNumber,
-        lazyStore: BalanceAndProxyAllowanceLazyStore,
-        fillRevertReasonIfExists: RevertReason | undefined,
-    ): Promise<void> {
-        if (!_.isUndefined(fillRevertReasonIfExists)) {
-            return expectTransactionFailedAsync(
-                this.exchangeWrapper.fillOrderAsync(signedOrder, this.takerAddress, { takerAssetFillAmount }),
-                fillRevertReasonIfExists,
-            );
-        }
-
-        const makerAddress = signedOrder.makerAddress;
-        const makerAssetData = signedOrder.makerAssetData;
-        const takerAssetData = signedOrder.takerAssetData;
-        const feeRecipient = signedOrder.feeRecipientAddress;
-
-        const expMakerAssetBalanceOfMaker = await lazyStore.getBalanceAsync(makerAssetData, makerAddress);
-        const expMakerAssetAllowanceOfMaker = await lazyStore.getProxyAllowanceAsync(makerAssetData, makerAddress);
-        const expTakerAssetBalanceOfMaker = await lazyStore.getBalanceAsync(takerAssetData, makerAddress);
-        const expZRXAssetBalanceOfMaker = await lazyStore.getBalanceAsync(this.zrxAssetData, makerAddress);
-        const expZRXAssetAllowanceOfMaker = await lazyStore.getProxyAllowanceAsync(this.zrxAssetData, makerAddress);
-        const expTakerAssetBalanceOfTaker = await lazyStore.getBalanceAsync(takerAssetData, this.takerAddress);
-        const expTakerAssetAllowanceOfTaker = await lazyStore.getProxyAllowanceAsync(takerAssetData, this.takerAddress);
-        const expMakerAssetBalanceOfTaker = await lazyStore.getBalanceAsync(makerAssetData, this.takerAddress);
-        const expZRXAssetBalanceOfTaker = await lazyStore.getBalanceAsync(this.zrxAssetData, this.takerAddress);
-        const expZRXAssetAllowanceOfTaker = await lazyStore.getProxyAllowanceAsync(
-            this.zrxAssetData,
-            this.takerAddress,
-        );
-        const expZRXAssetBalanceOfFeeRecipient = await lazyStore.getBalanceAsync(this.zrxAssetData, feeRecipient);
-
-        const orderHash = orderHashUtils.getOrderHashHex(signedOrder);
-        const alreadyFilledTakerAmount = await this.exchangeWrapper.getTakerAssetFilledAmountAsync(orderHash);
-        const remainingTakerAmountToFill = signedOrder.takerAssetAmount.minus(alreadyFilledTakerAmount);
-        const expFilledTakerAmount = takerAssetFillAmount.gt(remainingTakerAmountToFill)
-            ? remainingTakerAmountToFill
-            : alreadyFilledTakerAmount.add(takerAssetFillAmount);
-
-        const expFilledMakerAmount = orderUtils.getPartialAmountFloor(
-            expFilledTakerAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.makerAssetAmount,
-        );
-        const expMakerFeePaid = orderUtils.getPartialAmountFloor(
-            expFilledTakerAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.makerFee,
-        );
-        const expTakerFeePaid = orderUtils.getPartialAmountFloor(
-            expFilledTakerAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.takerFee,
-        );
-        const fillResults = await this.exchangeWrapper.getFillOrderResultsAsync(signedOrder, this.takerAddress, {
-            takerAssetFillAmount,
-        });
-        expect(fillResults.takerAssetFilledAmount).to.be.bignumber.equal(
-            expFilledTakerAmount,
-            'takerAssetFilledAmount',
-        );
-        expect(fillResults.makerAssetFilledAmount).to.be.bignumber.equal(
-            expFilledMakerAmount,
-            'makerAssetFilledAmount',
-        );
-        expect(fillResults.takerFeePaid).to.be.bignumber.equal(expTakerFeePaid, 'takerFeePaid');
-        expect(fillResults.makerFeePaid).to.be.bignumber.equal(expMakerFeePaid, 'makerFeePaid');
-
-        // - Let's fill the order!
-        const txReceipt = await this.exchangeWrapper.fillOrderAsync(signedOrder, this.takerAddress, {
-            takerAssetFillAmount,
-        });
-
-        const actFilledTakerAmount = await this.exchangeWrapper.getTakerAssetFilledAmountAsync(orderHash);
-        expect(actFilledTakerAmount).to.be.bignumber.equal(expFilledTakerAmount, 'filledTakerAmount');
-
-        const exchangeLogs = _.filter(
-            txReceipt.logs,
-            txLog => txLog.address === this.exchangeWrapper.getExchangeAddress(),
-        );
-        expect(exchangeLogs.length).to.be.equal(1, 'logs length');
-        // tslint:disable-next-line:no-unnecessary-type-assertion
-        const log = txReceipt.logs[0] as LogWithDecodedArgs<ExchangeFillEventArgs>;
-        expect(log.args.makerAddress).to.be.equal(makerAddress, 'log.args.makerAddress');
-        expect(log.args.takerAddress).to.be.equal(this.takerAddress, 'log.args.this.takerAddress');
-        expect(log.args.feeRecipientAddress).to.be.equal(feeRecipient, 'log.args.feeRecipientAddress');
-        expect(log.args.makerAssetFilledAmount).to.be.bignumber.equal(
-            expFilledMakerAmount,
-            'log.args.makerAssetFilledAmount',
-        );
-        expect(log.args.takerAssetFilledAmount).to.be.bignumber.equal(
-            expFilledTakerAmount,
-            'log.args.takerAssetFilledAmount',
-        );
-        expect(log.args.makerFeePaid).to.be.bignumber.equal(expMakerFeePaid, 'log.args.makerFeePaid');
-        expect(log.args.takerFeePaid).to.be.bignumber.equal(expTakerFeePaid, 'logs.args.takerFeePaid');
-        expect(log.args.orderHash).to.be.equal(orderHash, 'log.args.orderHash');
-        expect(log.args.makerAssetData).to.be.equal(makerAssetData, 'log.args.makerAssetData');
-        expect(log.args.takerAssetData).to.be.equal(takerAssetData, 'log.args.takerAssetData');
-
-        const actMakerAssetBalanceOfMaker = await this.assetWrapper.getBalanceAsync(makerAddress, makerAssetData);
-        expect(actMakerAssetBalanceOfMaker).to.be.bignumber.equal(
-            expMakerAssetBalanceOfMaker,
-            'makerAssetBalanceOfMaker',
-        );
-
-        const actMakerAssetAllowanceOfMaker = await this.assetWrapper.getProxyAllowanceAsync(
-            makerAddress,
-            makerAssetData,
-        );
-        expect(actMakerAssetAllowanceOfMaker).to.be.bignumber.equal(
-            expMakerAssetAllowanceOfMaker,
-            'makerAssetAllowanceOfMaker',
-        );
-
-        const actTakerAssetBalanceOfMaker = await this.assetWrapper.getBalanceAsync(makerAddress, takerAssetData);
-        expect(actTakerAssetBalanceOfMaker).to.be.bignumber.equal(
-            expTakerAssetBalanceOfMaker,
-            'takerAssetBalanceOfMaker',
-        );
-
-        const actZRXAssetBalanceOfMaker = await this.assetWrapper.getBalanceAsync(makerAddress, this.zrxAssetData);
-        expect(actZRXAssetBalanceOfMaker).to.be.bignumber.equal(expZRXAssetBalanceOfMaker, 'ZRXAssetBalanceOfMaker');
-
-        const actZRXAssetAllowanceOfMaker = await this.assetWrapper.getProxyAllowanceAsync(
-            makerAddress,
-            this.zrxAssetData,
-        );
-        expect(actZRXAssetAllowanceOfMaker).to.be.bignumber.equal(
-            expZRXAssetAllowanceOfMaker,
-            'ZRXAssetAllowanceOfMaker',
-        );
-
-        const actTakerAssetBalanceOfTaker = await this.assetWrapper.getBalanceAsync(this.takerAddress, takerAssetData);
-        expect(actTakerAssetBalanceOfTaker).to.be.bignumber.equal(
-            expTakerAssetBalanceOfTaker,
-            'TakerAssetBalanceOfTaker',
-        );
-
-        const actTakerAssetAllowanceOfTaker = await this.assetWrapper.getProxyAllowanceAsync(
-            this.takerAddress,
-            takerAssetData,
-        );
-
-        expect(actTakerAssetAllowanceOfTaker).to.be.bignumber.equal(
-            expTakerAssetAllowanceOfTaker,
-            'TakerAssetAllowanceOfTaker',
-        );
-
-        const actMakerAssetBalanceOfTaker = await this.assetWrapper.getBalanceAsync(this.takerAddress, makerAssetData);
-        expect(actMakerAssetBalanceOfTaker).to.be.bignumber.equal(
-            expMakerAssetBalanceOfTaker,
-            'MakerAssetBalanceOfTaker',
-        );
-
-        const actZRXAssetBalanceOfTaker = await this.assetWrapper.getBalanceAsync(this.takerAddress, this.zrxAssetData);
-        expect(actZRXAssetBalanceOfTaker).to.be.bignumber.equal(expZRXAssetBalanceOfTaker, 'ZRXAssetBalanceOfTaker');
-
-        const actZRXAssetAllowanceOfTaker = await this.assetWrapper.getProxyAllowanceAsync(
-            this.takerAddress,
-            this.zrxAssetData,
-        );
-        expect(actZRXAssetAllowanceOfTaker).to.be.bignumber.equal(
-            expZRXAssetAllowanceOfTaker,
-            'ZRXAssetAllowanceOfTaker',
-        );
-
-        const actZRXAssetBalanceOfFeeRecipient = await this.assetWrapper.getBalanceAsync(
-            feeRecipient,
-            this.zrxAssetData,
-        );
-        expect(actZRXAssetBalanceOfFeeRecipient).to.be.bignumber.equal(
-            expZRXAssetBalanceOfFeeRecipient,
-            'ZRXAssetBalanceOfFeeRecipient',
-        );
-    }
-    private async _abiEncodeFillOrderAndAssertOutcomeAsync(
-        signedOrder: SignedOrder,
-        takerAssetFillAmount: BigNumber,
-    ): Promise<void> {
-        const params = orderUtils.createFill(signedOrder, takerAssetFillAmount);
-        const expectedAbiEncodedData = this.exchangeWrapper.abiEncodeFillOrder(signedOrder, { takerAssetFillAmount });
-        const libsAbiEncodedData = await this.testLibsContract.publicAbiEncodeFillOrder.callAsync(
-            params.order,
-            params.takerAssetFillAmount,
-            params.signature,
-        );
-        expect(libsAbiEncodedData).to.be.equal(expectedAbiEncodedData, 'ABIEncodedFillOrderData');
-    }
-    private async _getTakerAssetFillAmountAsync(
-        signedOrder: SignedOrder,
-        takerAssetFillAmountScenario: TakerAssetFillAmountScenario,
-        balanceAndProxyAllowanceFetcher: SimpleAssetBalanceAndProxyAllowanceFetcher,
-        orderFilledCancelledFetcher: SimpleOrderFilledCancelledFetcher,
-    ): Promise<BigNumber> {
-        const orderStateUtils = new OrderStateUtils(balanceAndProxyAllowanceFetcher, orderFilledCancelledFetcher);
-        const fillableTakerAssetAmount = await orderStateUtils.getMaxFillableTakerAssetAmountAsync(
-            signedOrder,
-            this.takerAddress,
-        );
-
-        let takerAssetFillAmount;
-        switch (takerAssetFillAmountScenario) {
-            case TakerAssetFillAmountScenario.Zero:
-                takerAssetFillAmount = new BigNumber(0);
-                break;
-
-            case TakerAssetFillAmountScenario.ExactlyRemainingFillableTakerAssetAmount:
-                takerAssetFillAmount = fillableTakerAssetAmount;
-                break;
-
-            case TakerAssetFillAmountScenario.GreaterThanRemainingFillableTakerAssetAmount:
-                takerAssetFillAmount = fillableTakerAssetAmount.add(1);
-                break;
-
-            case TakerAssetFillAmountScenario.LessThanRemainingFillableTakerAssetAmount:
-                const takerAssetProxyId = assetDataUtils.decodeAssetProxyId(signedOrder.takerAssetData);
-                const makerAssetProxyId = assetDataUtils.decodeAssetProxyId(signedOrder.makerAssetData);
-                const isEitherAssetERC721 =
-                    takerAssetProxyId === AssetProxyId.ERC721 || makerAssetProxyId === AssetProxyId.ERC721;
-                if (isEitherAssetERC721) {
-                    throw new Error(
-                        'Cannot test `TakerAssetFillAmountScenario.LessThanRemainingFillableTakerAssetAmount` together with ERC721 assets since orders involving ERC721 must always be filled exactly.',
-                    );
-                }
-                takerAssetFillAmount = fillableTakerAssetAmount.div(2).floor();
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr('TakerAssetFillAmountScenario', takerAssetFillAmountScenario);
-        }
-
-        return takerAssetFillAmount;
-    }
-    private async _modifyTraderStateAsync(
-        makerStateScenario: TraderStateScenario,
-        takerStateScenario: TraderStateScenario,
-        signedOrder: SignedOrder,
-        takerAssetFillAmount: BigNumber,
-    ): Promise<void> {
-        const makerAssetFillAmount = orderUtils.getPartialAmountFloor(
-            takerAssetFillAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.makerAssetAmount,
-        );
-        switch (makerStateScenario.traderAssetBalance) {
-            case BalanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case BalanceAmountScenario.TooLow:
-                if (makerAssetFillAmount.eq(0)) {
-                    throw new Error(`Cannot set makerAssetBalanceOfMaker TooLow if makerAssetFillAmount is 0`);
-                }
-                const tooLowBalance = makerAssetFillAmount.minus(1);
-                await this.assetWrapper.setBalanceAsync(
-                    signedOrder.makerAddress,
-                    signedOrder.makerAssetData,
-                    tooLowBalance,
-                );
-                break;
-
-            case BalanceAmountScenario.Exact:
-                const exactBalance = makerAssetFillAmount;
-                await this.assetWrapper.setBalanceAsync(
-                    signedOrder.makerAddress,
-                    signedOrder.makerAssetData,
-                    exactBalance,
-                );
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'makerStateScenario.traderAssetBalance',
-                    makerStateScenario.traderAssetBalance,
-                );
-        }
-
-        const makerFee = orderUtils.getPartialAmountFloor(
-            takerAssetFillAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.makerFee,
-        );
-        switch (makerStateScenario.zrxFeeBalance) {
-            case BalanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case BalanceAmountScenario.TooLow:
-                if (makerFee.eq(0)) {
-                    throw new Error(`Cannot set zrxAsserBalanceOfMaker TooLow if makerFee is 0`);
-                }
-                const tooLowBalance = makerFee.minus(1);
-                await this.assetWrapper.setBalanceAsync(signedOrder.makerAddress, this.zrxAssetData, tooLowBalance);
-                break;
-
-            case BalanceAmountScenario.Exact:
-                const exactBalance = makerFee;
-                await this.assetWrapper.setBalanceAsync(signedOrder.makerAddress, this.zrxAssetData, exactBalance);
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr('makerStateScenario.zrxFeeBalance', makerStateScenario.zrxFeeBalance);
-        }
-
-        switch (makerStateScenario.traderAssetAllowance) {
-            case AllowanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case AllowanceAmountScenario.TooLow:
-                const tooLowAllowance = makerAssetFillAmount.minus(1);
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    signedOrder.makerAssetData,
-                    tooLowAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Exact:
-                const exactAllowance = makerAssetFillAmount;
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    signedOrder.makerAssetData,
-                    exactAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Unlimited:
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    signedOrder.makerAssetData,
-                    constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-                );
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'makerStateScenario.traderAssetAllowance',
-                    makerStateScenario.traderAssetAllowance,
-                );
-        }
-
-        switch (makerStateScenario.zrxFeeAllowance) {
-            case AllowanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case AllowanceAmountScenario.TooLow:
-                const tooLowAllowance = makerFee.minus(1);
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    this.zrxAssetData,
-                    tooLowAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Exact:
-                const exactAllowance = makerFee;
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    this.zrxAssetData,
-                    exactAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Unlimited:
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    signedOrder.makerAddress,
-                    this.zrxAssetData,
-                    constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-                );
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'makerStateScenario.zrxFeeAllowance',
-                    makerStateScenario.zrxFeeAllowance,
-                );
-        }
-
-        switch (takerStateScenario.traderAssetBalance) {
-            case BalanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case BalanceAmountScenario.TooLow:
-                if (takerAssetFillAmount.eq(0)) {
-                    throw new Error(`Cannot set takerAssetBalanceOfTaker TooLow if takerAssetFillAmount is 0`);
-                }
-                const tooLowBalance = takerAssetFillAmount.minus(1);
-                await this.assetWrapper.setBalanceAsync(this.takerAddress, signedOrder.takerAssetData, tooLowBalance);
-                break;
-
-            case BalanceAmountScenario.Exact:
-                const exactBalance = takerAssetFillAmount;
-                await this.assetWrapper.setBalanceAsync(this.takerAddress, signedOrder.takerAssetData, exactBalance);
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'takerStateScenario.traderAssetBalance',
-                    takerStateScenario.traderAssetBalance,
-                );
-        }
-
-        const takerFee = orderUtils.getPartialAmountFloor(
-            takerAssetFillAmount,
-            signedOrder.takerAssetAmount,
-            signedOrder.takerFee,
-        );
-        switch (takerStateScenario.zrxFeeBalance) {
-            case BalanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case BalanceAmountScenario.TooLow:
-                if (takerFee.eq(0)) {
-                    throw new Error(`Cannot set zrxAssetBalanceOfTaker TooLow if takerFee is 0`);
-                }
-                const tooLowBalance = takerFee.minus(1);
-                await this.assetWrapper.setBalanceAsync(this.takerAddress, this.zrxAssetData, tooLowBalance);
-                break;
-
-            case BalanceAmountScenario.Exact:
-                const exactBalance = takerFee;
-                await this.assetWrapper.setBalanceAsync(this.takerAddress, this.zrxAssetData, exactBalance);
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr('takerStateScenario.zrxFeeBalance', takerStateScenario.zrxFeeBalance);
-        }
-
-        switch (takerStateScenario.traderAssetAllowance) {
-            case AllowanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case AllowanceAmountScenario.TooLow:
-                const tooLowAllowance = takerAssetFillAmount.minus(1);
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    this.takerAddress,
-                    signedOrder.takerAssetData,
-                    tooLowAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Exact:
-                const exactAllowance = takerAssetFillAmount;
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    this.takerAddress,
-                    signedOrder.takerAssetData,
-                    exactAllowance,
-                );
-                break;
-
-            case AllowanceAmountScenario.Unlimited:
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    this.takerAddress,
-                    signedOrder.takerAssetData,
-                    constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-                );
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'takerStateScenario.traderAssetAllowance',
-                    takerStateScenario.traderAssetAllowance,
-                );
-        }
-
-        switch (takerStateScenario.zrxFeeAllowance) {
-            case AllowanceAmountScenario.Higher:
-                break; // Noop since this is already the default
-
-            case AllowanceAmountScenario.TooLow:
-                const tooLowAllowance = takerFee.minus(1);
-                await this.assetWrapper.setProxyAllowanceAsync(this.takerAddress, this.zrxAssetData, tooLowAllowance);
-                break;
-
-            case AllowanceAmountScenario.Exact:
-                const exactAllowance = takerFee;
-                await this.assetWrapper.setProxyAllowanceAsync(this.takerAddress, this.zrxAssetData, exactAllowance);
-                break;
-
-            case AllowanceAmountScenario.Unlimited:
-                await this.assetWrapper.setProxyAllowanceAsync(
-                    this.takerAddress,
-                    this.zrxAssetData,
-                    constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-                );
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'takerStateScenario.zrxFeeAllowance',
-                    takerStateScenario.zrxFeeAllowance,
-                );
-        }
-    }
-} // tslint:disable:max-file-line-count
diff --git a/contracts/core/test/utils/index.ts b/contracts/core/test/utils/index.ts
deleted file mode 100644
index 75cd88666..000000000
--- a/contracts/core/test/utils/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export * from './exchange_wrapper';
-export * from './erc20_wrapper';
-export * from './erc721_wrapper';
diff --git a/contracts/core/test/utils/match_order_tester.ts b/contracts/core/test/utils/match_order_tester.ts
deleted file mode 100644
index 8f574704e..000000000
--- a/contracts/core/test/utils/match_order_tester.ts
+++ /dev/null
@@ -1,562 +0,0 @@
-import {
-    chaiSetup,
-    ERC20BalancesByOwner,
-    ERC721TokenIdsByOwner,
-    OrderInfo,
-    OrderStatus,
-    TransferAmountsByMatchOrders as TransferAmounts,
-    TransferAmountsLoggedByMatchOrders as LoggedTransferAmounts,
-} from '@0x/contracts-test-utils';
-import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
-import { AssetProxyId, SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-import * as chai from 'chai';
-import * as _ from 'lodash';
-
-import { TransactionReceiptWithDecodedLogs } from '../../../../node_modules/ethereum-types';
-
-import { ERC20Wrapper } from './erc20_wrapper';
-import { ERC721Wrapper } from './erc721_wrapper';
-import { ExchangeWrapper } from './exchange_wrapper';
-
-chaiSetup.configure();
-const expect = chai.expect;
-
-export class MatchOrderTester {
-    private readonly _exchangeWrapper: ExchangeWrapper;
-    private readonly _erc20Wrapper: ERC20Wrapper;
-    private readonly _erc721Wrapper: ERC721Wrapper;
-    private readonly _feeTokenAddress: string;
-    /// @dev Checks values from the logs produced by Exchange.matchOrders against the expected transfer amounts.
-    ///      Values include the amounts transferred from the left/right makers and taker, along with
-    ///      the fees paid on each matched order. These are also the return values of MatchOrders.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param transactionReceipt Transaction receipt and logs produced by Exchange.matchOrders.
-    /// @param takerAddress Address of taker (account that called Exchange.matchOrders)
-    /// @param expectedTransferAmounts Expected amounts transferred as a result of order matching.
-    private static async _assertLogsAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        transactionReceipt: TransactionReceiptWithDecodedLogs,
-        takerAddress: string,
-        expectedTransferAmounts: TransferAmounts,
-    ): Promise<void> {
-        // Should have two fill event logs -- one for each order.
-        const transactionFillLogs = _.filter(transactionReceipt.logs, ['event', 'Fill']);
-        expect(transactionFillLogs.length, 'Checking number of logs').to.be.equal(2);
-        // First log is for left fill
-        const leftLog = (transactionFillLogs[0] as any).args as LoggedTransferAmounts;
-        expect(leftLog.makerAddress, 'Checking logged maker address of left order').to.be.equal(
-            signedOrderLeft.makerAddress,
-        );
-        expect(leftLog.takerAddress, 'Checking logged taker address of right order').to.be.equal(takerAddress);
-        const amountBoughtByLeftMaker = new BigNumber(leftLog.takerAssetFilledAmount);
-        const amountSoldByLeftMaker = new BigNumber(leftLog.makerAssetFilledAmount);
-        const feePaidByLeftMaker = new BigNumber(leftLog.makerFeePaid);
-        const feePaidByTakerLeft = new BigNumber(leftLog.takerFeePaid);
-        // Second log is for right fill
-        const rightLog = (transactionFillLogs[1] as any).args as LoggedTransferAmounts;
-        expect(rightLog.makerAddress, 'Checking logged maker address of right order').to.be.equal(
-            signedOrderRight.makerAddress,
-        );
-        expect(rightLog.takerAddress, 'Checking loggerd taker address of right order').to.be.equal(takerAddress);
-        const amountBoughtByRightMaker = new BigNumber(rightLog.takerAssetFilledAmount);
-        const amountSoldByRightMaker = new BigNumber(rightLog.makerAssetFilledAmount);
-        const feePaidByRightMaker = new BigNumber(rightLog.makerFeePaid);
-        const feePaidByTakerRight = new BigNumber(rightLog.takerFeePaid);
-        // Derive amount received by taker
-        const amountReceivedByTaker = amountSoldByLeftMaker.sub(amountBoughtByRightMaker);
-        // Assert log values - left order
-        expect(amountBoughtByLeftMaker, 'Checking logged amount bought by left maker').to.be.bignumber.equal(
-            expectedTransferAmounts.amountBoughtByLeftMaker,
-        );
-        expect(amountSoldByLeftMaker, 'Checking logged amount sold by left maker').to.be.bignumber.equal(
-            expectedTransferAmounts.amountSoldByLeftMaker,
-        );
-        expect(feePaidByLeftMaker, 'Checking logged fee paid by left maker').to.be.bignumber.equal(
-            expectedTransferAmounts.feePaidByLeftMaker,
-        );
-        expect(feePaidByTakerLeft, 'Checking logged fee paid on left order by taker').to.be.bignumber.equal(
-            expectedTransferAmounts.feePaidByTakerLeft,
-        );
-        // Assert log values - right order
-        expect(amountBoughtByRightMaker, 'Checking logged amount bought by right maker').to.be.bignumber.equal(
-            expectedTransferAmounts.amountBoughtByRightMaker,
-        );
-        expect(amountSoldByRightMaker, 'Checking logged amount sold by right maker').to.be.bignumber.equal(
-            expectedTransferAmounts.amountSoldByRightMaker,
-        );
-        expect(feePaidByRightMaker, 'Checking logged fee paid by right maker').to.be.bignumber.equal(
-            expectedTransferAmounts.feePaidByRightMaker,
-        );
-        expect(feePaidByTakerRight, 'Checking logged fee paid on right order by taker').to.be.bignumber.equal(
-            expectedTransferAmounts.feePaidByTakerRight,
-        );
-        // Assert derived amount received by taker
-        expect(amountReceivedByTaker, 'Checking logged amount received by taker').to.be.bignumber.equal(
-            expectedTransferAmounts.amountReceivedByTaker,
-        );
-    }
-    /// @dev Asserts all expected ERC20 and ERC721 account holdings match the real holdings.
-    /// @param expectedERC20BalancesByOwner Expected ERC20 balances.
-    /// @param realERC20BalancesByOwner Real ERC20 balances.
-    /// @param expectedERC721TokenIdsByOwner Expected ERC721 token owners.
-    /// @param realERC721TokenIdsByOwner Real ERC20 token owners.
-    private static async _assertAllKnownBalancesAsync(
-        expectedERC20BalancesByOwner: ERC20BalancesByOwner,
-        realERC20BalancesByOwner: ERC20BalancesByOwner,
-        expectedERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        realERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-    ): Promise<void> {
-        // ERC20 Balances
-        const areERC20BalancesEqual = _.isEqual(expectedERC20BalancesByOwner, realERC20BalancesByOwner);
-        expect(areERC20BalancesEqual, 'Checking all known ERC20 account balances').to.be.true();
-        // ERC721 Token Ids
-        const sortedExpectedNewERC721TokenIdsByOwner = _.mapValues(expectedERC721TokenIdsByOwner, tokenIdsByOwner => {
-            _.mapValues(tokenIdsByOwner, tokenIds => {
-                _.sortBy(tokenIds);
-            });
-        });
-        const sortedNewERC721TokenIdsByOwner = _.mapValues(realERC721TokenIdsByOwner, tokenIdsByOwner => {
-            _.mapValues(tokenIdsByOwner, tokenIds => {
-                _.sortBy(tokenIds);
-            });
-        });
-        const areERC721TokenIdsEqual = _.isEqual(
-            sortedExpectedNewERC721TokenIdsByOwner,
-            sortedNewERC721TokenIdsByOwner,
-        );
-        expect(areERC721TokenIdsEqual, 'Checking all known ERC721 account balances').to.be.true();
-    }
-    /// @dev Constructs new MatchOrderTester.
-    /// @param exchangeWrapper Used to call to the Exchange.
-    /// @param erc20Wrapper Used to fetch ERC20 balances.
-    /// @param erc721Wrapper Used to fetch ERC721 token owners.
-    /// @param feeTokenAddress Address of ERC20 fee token.
-    constructor(
-        exchangeWrapper: ExchangeWrapper,
-        erc20Wrapper: ERC20Wrapper,
-        erc721Wrapper: ERC721Wrapper,
-        feeTokenAddress: string,
-    ) {
-        this._exchangeWrapper = exchangeWrapper;
-        this._erc20Wrapper = erc20Wrapper;
-        this._erc721Wrapper = erc721Wrapper;
-        this._feeTokenAddress = feeTokenAddress;
-    }
-    /// @dev Matches two complementary orders and asserts results.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param takerAddress Address of taker (the address who matched the two orders)
-    /// @param erc20BalancesByOwner Current ERC20 balances.
-    /// @param erc721TokenIdsByOwner Current ERC721 token owners.
-    /// @param expectedTransferAmounts Expected amounts transferred as a result of order matching.
-    /// @param initialLeftOrderFilledAmount How much left order has been filled, prior to matching orders.
-    /// @param initialRightOrderFilledAmount How much the right order has been filled, prior to matching orders.
-    /// @return New ERC20 balances & ERC721 token owners.
-    public async matchOrdersAndAssertEffectsAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        takerAddress: string,
-        erc20BalancesByOwner: ERC20BalancesByOwner,
-        erc721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        expectedTransferAmounts: TransferAmounts,
-        initialLeftOrderFilledAmount: BigNumber = new BigNumber(0),
-        initialRightOrderFilledAmount: BigNumber = new BigNumber(0),
-    ): Promise<[ERC20BalancesByOwner, ERC721TokenIdsByOwner]> {
-        // Assert initial order states
-        await this._assertInitialOrderStatesAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            initialLeftOrderFilledAmount,
-            initialRightOrderFilledAmount,
-        );
-        // Match left & right orders
-        const transactionReceipt = await this._exchangeWrapper.matchOrdersAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            takerAddress,
-        );
-        const newERC20BalancesByOwner = await this._erc20Wrapper.getBalancesAsync();
-        const newERC721TokenIdsByOwner = await this._erc721Wrapper.getBalancesAsync();
-        // Assert logs
-        await MatchOrderTester._assertLogsAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            transactionReceipt,
-            takerAddress,
-            expectedTransferAmounts,
-        );
-        // Assert exchange state
-        await this._assertExchangeStateAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            initialLeftOrderFilledAmount,
-            initialRightOrderFilledAmount,
-            expectedTransferAmounts,
-        );
-        // Assert balances of makers, taker, and fee recipients
-        await this._assertBalancesAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            erc20BalancesByOwner,
-            erc721TokenIdsByOwner,
-            newERC20BalancesByOwner,
-            newERC721TokenIdsByOwner,
-            expectedTransferAmounts,
-            takerAddress,
-        );
-        return [newERC20BalancesByOwner, newERC721TokenIdsByOwner];
-    }
-    /// @dev Asserts initial exchange state for the left and right orders.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param expectedOrderFilledAmountLeft How much left order has been filled, prior to matching orders.
-    /// @param expectedOrderFilledAmountRight How much the right order has been filled, prior to matching orders.
-    private async _assertInitialOrderStatesAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        expectedOrderFilledAmountLeft: BigNumber,
-        expectedOrderFilledAmountRight: BigNumber,
-    ): Promise<void> {
-        // Assert left order initial state
-        const orderTakerAssetFilledAmountLeft = await this._exchangeWrapper.getTakerAssetFilledAmountAsync(
-            orderHashUtils.getOrderHashHex(signedOrderLeft),
-        );
-        expect(orderTakerAssetFilledAmountLeft, 'Checking inital state of left order').to.be.bignumber.equal(
-            expectedOrderFilledAmountLeft,
-        );
-        // Assert right order initial state
-        const orderTakerAssetFilledAmountRight = await this._exchangeWrapper.getTakerAssetFilledAmountAsync(
-            orderHashUtils.getOrderHashHex(signedOrderRight),
-        );
-        expect(orderTakerAssetFilledAmountRight, 'Checking inital state of right order').to.be.bignumber.equal(
-            expectedOrderFilledAmountRight,
-        );
-    }
-    /// @dev Asserts the exchange state against the expected amounts transferred by from matching orders.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param initialLeftOrderFilledAmount How much left order has been filled, prior to matching orders.
-    /// @param initialRightOrderFilledAmount How much the right order has been filled, prior to matching orders.
-    /// @return TransferAmounts A struct containing the expected transfer amounts.
-    private async _assertExchangeStateAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        initialLeftOrderFilledAmount: BigNumber,
-        initialRightOrderFilledAmount: BigNumber,
-        expectedTransferAmounts: TransferAmounts,
-    ): Promise<void> {
-        // Assert state for left order: amount bought by left maker
-        let amountBoughtByLeftMaker = await this._exchangeWrapper.getTakerAssetFilledAmountAsync(
-            orderHashUtils.getOrderHashHex(signedOrderLeft),
-        );
-        amountBoughtByLeftMaker = amountBoughtByLeftMaker.minus(initialLeftOrderFilledAmount);
-        expect(amountBoughtByLeftMaker, 'Checking exchange state for left order').to.be.bignumber.equal(
-            expectedTransferAmounts.amountBoughtByLeftMaker,
-        );
-        // Assert state for right order: amount bought by right maker
-        let amountBoughtByRightMaker = await this._exchangeWrapper.getTakerAssetFilledAmountAsync(
-            orderHashUtils.getOrderHashHex(signedOrderRight),
-        );
-        amountBoughtByRightMaker = amountBoughtByRightMaker.minus(initialRightOrderFilledAmount);
-        expect(amountBoughtByRightMaker, 'Checking exchange state for right order').to.be.bignumber.equal(
-            expectedTransferAmounts.amountBoughtByRightMaker,
-        );
-        // Assert left order status
-        const maxAmountBoughtByLeftMaker = signedOrderLeft.takerAssetAmount.minus(initialLeftOrderFilledAmount);
-        const leftOrderInfo: OrderInfo = await this._exchangeWrapper.getOrderInfoAsync(signedOrderLeft);
-        const leftExpectedStatus = expectedTransferAmounts.amountBoughtByLeftMaker.equals(maxAmountBoughtByLeftMaker)
-            ? OrderStatus.FULLY_FILLED
-            : OrderStatus.FILLABLE;
-        expect(leftOrderInfo.orderStatus, 'Checking exchange status for left order').to.be.equal(leftExpectedStatus);
-        // Assert right order status
-        const maxAmountBoughtByRightMaker = signedOrderRight.takerAssetAmount.minus(initialRightOrderFilledAmount);
-        const rightOrderInfo: OrderInfo = await this._exchangeWrapper.getOrderInfoAsync(signedOrderRight);
-        const rightExpectedStatus = expectedTransferAmounts.amountBoughtByRightMaker.equals(maxAmountBoughtByRightMaker)
-            ? OrderStatus.FULLY_FILLED
-            : OrderStatus.FILLABLE;
-        expect(rightOrderInfo.orderStatus, 'Checking exchange status for right order').to.be.equal(rightExpectedStatus);
-    }
-    /// @dev Asserts account balances after matching orders.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param initialERC20BalancesByOwner ERC20 balances prior to order matching.
-    /// @param initialERC721TokenIdsByOwner ERC721 token owners prior to order matching.
-    /// @param finalERC20BalancesByOwner ERC20 balances after order matching.
-    /// @param finalERC721TokenIdsByOwner ERC721 token owners after order matching.
-    /// @param expectedTransferAmounts Expected amounts transferred as a result of order matching.
-    /// @param takerAddress Address of taker (account that called Exchange.matchOrders).
-    private async _assertBalancesAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        initialERC20BalancesByOwner: ERC20BalancesByOwner,
-        initialERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        finalERC20BalancesByOwner: ERC20BalancesByOwner,
-        finalERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        expectedTransferAmounts: TransferAmounts,
-        takerAddress: string,
-    ): Promise<void> {
-        let expectedERC20BalancesByOwner: ERC20BalancesByOwner;
-        let expectedERC721TokenIdsByOwner: ERC721TokenIdsByOwner;
-        [expectedERC20BalancesByOwner, expectedERC721TokenIdsByOwner] = this._calculateExpectedBalances(
-            signedOrderLeft,
-            signedOrderRight,
-            takerAddress,
-            initialERC20BalancesByOwner,
-            initialERC721TokenIdsByOwner,
-            expectedTransferAmounts,
-        );
-        // Assert balances of makers, taker, and fee recipients
-        await this._assertMakerTakerAndFeeRecipientBalancesAsync(
-            signedOrderLeft,
-            signedOrderRight,
-            expectedERC20BalancesByOwner,
-            finalERC20BalancesByOwner,
-            expectedERC721TokenIdsByOwner,
-            finalERC721TokenIdsByOwner,
-            takerAddress,
-        );
-        // Assert balances for all known accounts
-        await MatchOrderTester._assertAllKnownBalancesAsync(
-            expectedERC20BalancesByOwner,
-            finalERC20BalancesByOwner,
-            expectedERC721TokenIdsByOwner,
-            finalERC721TokenIdsByOwner,
-        );
-    }
-    /// @dev Calculates the expected balances of order makers, fee recipients, and the taker,
-    ///      as a result of matching two orders.
-    /// @param signedOrderRight First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param takerAddress Address of taker (the address who matched the two orders)
-    /// @param erc20BalancesByOwner Current ERC20 balances.
-    /// @param erc721TokenIdsByOwner Current ERC721 token owners.
-    /// @param expectedTransferAmounts Expected amounts transferred as a result of order matching.
-    /// @return Expected ERC20 balances & ERC721 token owners after orders have been matched.
-    private _calculateExpectedBalances(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        takerAddress: string,
-        erc20BalancesByOwner: ERC20BalancesByOwner,
-        erc721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        expectedTransferAmounts: TransferAmounts,
-    ): [ERC20BalancesByOwner, ERC721TokenIdsByOwner] {
-        const makerAddressLeft = signedOrderLeft.makerAddress;
-        const makerAddressRight = signedOrderRight.makerAddress;
-        const feeRecipientAddressLeft = signedOrderLeft.feeRecipientAddress;
-        const feeRecipientAddressRight = signedOrderRight.feeRecipientAddress;
-        // Operations are performed on copies of the balances
-        const expectedNewERC20BalancesByOwner = _.cloneDeep(erc20BalancesByOwner);
-        const expectedNewERC721TokenIdsByOwner = _.cloneDeep(erc721TokenIdsByOwner);
-        // Left Maker Asset (Right Taker Asset)
-        const makerAssetProxyIdLeft = assetDataUtils.decodeAssetProxyId(signedOrderLeft.makerAssetData);
-        if (makerAssetProxyIdLeft === AssetProxyId.ERC20) {
-            // Decode asset data
-            const erc20AssetData = assetDataUtils.decodeERC20AssetData(signedOrderLeft.makerAssetData);
-            const makerAssetAddressLeft = erc20AssetData.tokenAddress;
-            const takerAssetAddressRight = makerAssetAddressLeft;
-            // Left Maker
-            expectedNewERC20BalancesByOwner[makerAddressLeft][makerAssetAddressLeft] = expectedNewERC20BalancesByOwner[
-                makerAddressLeft
-            ][makerAssetAddressLeft].minus(expectedTransferAmounts.amountSoldByLeftMaker);
-            // Right Maker
-            expectedNewERC20BalancesByOwner[makerAddressRight][
-                takerAssetAddressRight
-            ] = expectedNewERC20BalancesByOwner[makerAddressRight][takerAssetAddressRight].add(
-                expectedTransferAmounts.amountBoughtByRightMaker,
-            );
-            // Taker
-            expectedNewERC20BalancesByOwner[takerAddress][makerAssetAddressLeft] = expectedNewERC20BalancesByOwner[
-                takerAddress
-            ][makerAssetAddressLeft].add(expectedTransferAmounts.amountReceivedByTaker);
-        } else if (makerAssetProxyIdLeft === AssetProxyId.ERC721) {
-            // Decode asset data
-            const erc721AssetData = assetDataUtils.decodeERC721AssetData(signedOrderLeft.makerAssetData);
-            const makerAssetAddressLeft = erc721AssetData.tokenAddress;
-            const makerAssetIdLeft = erc721AssetData.tokenId;
-            const takerAssetAddressRight = makerAssetAddressLeft;
-            const takerAssetIdRight = makerAssetIdLeft;
-            // Left Maker
-            _.remove(expectedNewERC721TokenIdsByOwner[makerAddressLeft][makerAssetAddressLeft], makerAssetIdLeft);
-            // Right Maker
-            expectedNewERC721TokenIdsByOwner[makerAddressRight][takerAssetAddressRight].push(takerAssetIdRight);
-            // Taker: Since there is only 1 asset transferred, the taker does not receive any of the left maker asset.
-        }
-        // Left Taker Asset (Right Maker Asset)
-        // Note: This exchange is only between the order makers: the Taker does not receive any of the left taker asset.
-        const takerAssetProxyIdLeft = assetDataUtils.decodeAssetProxyId(signedOrderLeft.takerAssetData);
-        if (takerAssetProxyIdLeft === AssetProxyId.ERC20) {
-            // Decode asset data
-            const erc20AssetData = assetDataUtils.decodeERC20AssetData(signedOrderLeft.takerAssetData);
-            const takerAssetAddressLeft = erc20AssetData.tokenAddress;
-            const makerAssetAddressRight = takerAssetAddressLeft;
-            // Left Maker
-            expectedNewERC20BalancesByOwner[makerAddressLeft][takerAssetAddressLeft] = expectedNewERC20BalancesByOwner[
-                makerAddressLeft
-            ][takerAssetAddressLeft].add(expectedTransferAmounts.amountBoughtByLeftMaker);
-            // Right Maker
-            expectedNewERC20BalancesByOwner[makerAddressRight][
-                makerAssetAddressRight
-            ] = expectedNewERC20BalancesByOwner[makerAddressRight][makerAssetAddressRight].minus(
-                expectedTransferAmounts.amountSoldByRightMaker,
-            );
-        } else if (takerAssetProxyIdLeft === AssetProxyId.ERC721) {
-            // Decode asset data
-            const erc721AssetData = assetDataUtils.decodeERC721AssetData(signedOrderRight.makerAssetData);
-            const makerAssetAddressRight = erc721AssetData.tokenAddress;
-            const makerAssetIdRight = erc721AssetData.tokenId;
-            const takerAssetAddressLeft = makerAssetAddressRight;
-            const takerAssetIdLeft = makerAssetIdRight;
-            // Right Maker
-            _.remove(expectedNewERC721TokenIdsByOwner[makerAddressRight][makerAssetAddressRight], makerAssetIdRight);
-            // Left Maker
-            expectedNewERC721TokenIdsByOwner[makerAddressLeft][takerAssetAddressLeft].push(takerAssetIdLeft);
-        }
-        // Left Maker Fees
-        expectedNewERC20BalancesByOwner[makerAddressLeft][this._feeTokenAddress] = expectedNewERC20BalancesByOwner[
-            makerAddressLeft
-        ][this._feeTokenAddress].minus(expectedTransferAmounts.feePaidByLeftMaker);
-        // Right Maker Fees
-        expectedNewERC20BalancesByOwner[makerAddressRight][this._feeTokenAddress] = expectedNewERC20BalancesByOwner[
-            makerAddressRight
-        ][this._feeTokenAddress].minus(expectedTransferAmounts.feePaidByRightMaker);
-        // Taker Fees
-        expectedNewERC20BalancesByOwner[takerAddress][this._feeTokenAddress] = expectedNewERC20BalancesByOwner[
-            takerAddress
-        ][this._feeTokenAddress].minus(
-            expectedTransferAmounts.feePaidByTakerLeft.add(expectedTransferAmounts.feePaidByTakerRight),
-        );
-        // Left Fee Recipient Fees
-        expectedNewERC20BalancesByOwner[feeRecipientAddressLeft][
-            this._feeTokenAddress
-        ] = expectedNewERC20BalancesByOwner[feeRecipientAddressLeft][this._feeTokenAddress].add(
-            expectedTransferAmounts.feePaidByLeftMaker.add(expectedTransferAmounts.feePaidByTakerLeft),
-        );
-        // Right Fee Recipient Fees
-        expectedNewERC20BalancesByOwner[feeRecipientAddressRight][
-            this._feeTokenAddress
-        ] = expectedNewERC20BalancesByOwner[feeRecipientAddressRight][this._feeTokenAddress].add(
-            expectedTransferAmounts.feePaidByRightMaker.add(expectedTransferAmounts.feePaidByTakerRight),
-        );
-
-        return [expectedNewERC20BalancesByOwner, expectedNewERC721TokenIdsByOwner];
-    }
-    /// @dev Asserts ERC20 account balances and ERC721 token holdings that result from order matching.
-    ///      Specifically checks balances of makers, taker and fee recipients.
-    /// @param signedOrderLeft First matched order.
-    /// @param signedOrderRight Second matched order.
-    /// @param expectedERC20BalancesByOwner Expected ERC20 balances.
-    /// @param realERC20BalancesByOwner Real ERC20 balances.
-    /// @param expectedERC721TokenIdsByOwner Expected ERC721 token owners.
-    /// @param realERC721TokenIdsByOwner Real ERC20 token owners.
-    /// @param takerAddress Address of taker (account that called Exchange.matchOrders).
-    private async _assertMakerTakerAndFeeRecipientBalancesAsync(
-        signedOrderLeft: SignedOrder,
-        signedOrderRight: SignedOrder,
-        expectedERC20BalancesByOwner: ERC20BalancesByOwner,
-        realERC20BalancesByOwner: ERC20BalancesByOwner,
-        expectedERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        realERC721TokenIdsByOwner: ERC721TokenIdsByOwner,
-        takerAddress: string,
-    ): Promise<void> {
-        // Individual balance comparisons
-        const makerAssetProxyIdLeft = assetDataUtils.decodeAssetProxyId(signedOrderLeft.makerAssetData);
-        const makerERC20AssetDataLeft =
-            makerAssetProxyIdLeft === AssetProxyId.ERC20
-                ? assetDataUtils.decodeERC20AssetData(signedOrderLeft.makerAssetData)
-                : assetDataUtils.decodeERC721AssetData(signedOrderLeft.makerAssetData);
-        const makerAssetAddressLeft = makerERC20AssetDataLeft.tokenAddress;
-        const makerAssetProxyIdRight = assetDataUtils.decodeAssetProxyId(signedOrderRight.makerAssetData);
-        const makerERC20AssetDataRight =
-            makerAssetProxyIdRight === AssetProxyId.ERC20
-                ? assetDataUtils.decodeERC20AssetData(signedOrderRight.makerAssetData)
-                : assetDataUtils.decodeERC721AssetData(signedOrderRight.makerAssetData);
-        const makerAssetAddressRight = makerERC20AssetDataRight.tokenAddress;
-        if (makerAssetProxyIdLeft === AssetProxyId.ERC20) {
-            expect(
-                realERC20BalancesByOwner[signedOrderLeft.makerAddress][makerAssetAddressLeft],
-                'Checking left maker egress ERC20 account balance',
-            ).to.be.bignumber.equal(expectedERC20BalancesByOwner[signedOrderLeft.makerAddress][makerAssetAddressLeft]);
-            expect(
-                realERC20BalancesByOwner[signedOrderRight.makerAddress][makerAssetAddressLeft],
-                'Checking right maker ingress ERC20 account balance',
-            ).to.be.bignumber.equal(expectedERC20BalancesByOwner[signedOrderRight.makerAddress][makerAssetAddressLeft]);
-            expect(
-                realERC20BalancesByOwner[takerAddress][makerAssetAddressLeft],
-                'Checking taker ingress ERC20 account balance',
-            ).to.be.bignumber.equal(expectedERC20BalancesByOwner[takerAddress][makerAssetAddressLeft]);
-        } else if (makerAssetProxyIdLeft === AssetProxyId.ERC721) {
-            expect(
-                realERC721TokenIdsByOwner[signedOrderLeft.makerAddress][makerAssetAddressLeft].sort(),
-                'Checking left maker egress ERC721 account holdings',
-            ).to.be.deep.equal(
-                expectedERC721TokenIdsByOwner[signedOrderLeft.makerAddress][makerAssetAddressLeft].sort(),
-            );
-            expect(
-                realERC721TokenIdsByOwner[signedOrderRight.makerAddress][makerAssetAddressLeft].sort(),
-                'Checking right maker ERC721 account holdings',
-            ).to.be.deep.equal(
-                expectedERC721TokenIdsByOwner[signedOrderRight.makerAddress][makerAssetAddressLeft].sort(),
-            );
-            expect(
-                realERC721TokenIdsByOwner[takerAddress][makerAssetAddressLeft].sort(),
-                'Checking taker ingress ERC721 account holdings',
-            ).to.be.deep.equal(expectedERC721TokenIdsByOwner[takerAddress][makerAssetAddressLeft].sort());
-        } else {
-            throw new Error(`Unhandled Asset Proxy ID: ${makerAssetProxyIdLeft}`);
-        }
-        if (makerAssetProxyIdRight === AssetProxyId.ERC20) {
-            expect(
-                realERC20BalancesByOwner[signedOrderLeft.makerAddress][makerAssetAddressRight],
-                'Checking left maker ingress ERC20 account balance',
-            ).to.be.bignumber.equal(expectedERC20BalancesByOwner[signedOrderLeft.makerAddress][makerAssetAddressRight]);
-            expect(
-                realERC20BalancesByOwner[signedOrderRight.makerAddress][makerAssetAddressRight],
-                'Checking right maker egress ERC20 account balance',
-            ).to.be.bignumber.equal(
-                expectedERC20BalancesByOwner[signedOrderRight.makerAddress][makerAssetAddressRight],
-            );
-        } else if (makerAssetProxyIdRight === AssetProxyId.ERC721) {
-            expect(
-                realERC721TokenIdsByOwner[signedOrderLeft.makerAddress][makerAssetAddressRight].sort(),
-                'Checking left maker ingress ERC721 account holdings',
-            ).to.be.deep.equal(
-                expectedERC721TokenIdsByOwner[signedOrderLeft.makerAddress][makerAssetAddressRight].sort(),
-            );
-            expect(
-                realERC721TokenIdsByOwner[signedOrderRight.makerAddress][makerAssetAddressRight],
-                'Checking right maker agress ERC721 account holdings',
-            ).to.be.deep.equal(expectedERC721TokenIdsByOwner[signedOrderRight.makerAddress][makerAssetAddressRight]);
-        } else {
-            throw new Error(`Unhandled Asset Proxy ID: ${makerAssetProxyIdRight}`);
-        }
-        // Paid fees
-        expect(
-            realERC20BalancesByOwner[signedOrderLeft.makerAddress][this._feeTokenAddress],
-            'Checking left maker egress ERC20 account fees',
-        ).to.be.bignumber.equal(expectedERC20BalancesByOwner[signedOrderLeft.makerAddress][this._feeTokenAddress]);
-        expect(
-            realERC20BalancesByOwner[signedOrderRight.makerAddress][this._feeTokenAddress],
-            'Checking right maker egress ERC20 account fees',
-        ).to.be.bignumber.equal(expectedERC20BalancesByOwner[signedOrderRight.makerAddress][this._feeTokenAddress]);
-        expect(
-            realERC20BalancesByOwner[takerAddress][this._feeTokenAddress],
-            'Checking taker egress ERC20 account fees',
-        ).to.be.bignumber.equal(expectedERC20BalancesByOwner[takerAddress][this._feeTokenAddress]);
-        // Received fees
-        expect(
-            realERC20BalancesByOwner[signedOrderLeft.feeRecipientAddress][this._feeTokenAddress],
-            'Checking left fee recipient ingress ERC20 account fees',
-        ).to.be.bignumber.equal(
-            expectedERC20BalancesByOwner[signedOrderLeft.feeRecipientAddress][this._feeTokenAddress],
-        );
-        expect(
-            realERC20BalancesByOwner[signedOrderRight.feeRecipientAddress][this._feeTokenAddress],
-            'Checking right fee receipient ingress ERC20 account fees',
-        ).to.be.bignumber.equal(
-            expectedERC20BalancesByOwner[signedOrderRight.feeRecipientAddress][this._feeTokenAddress],
-        );
-    }
-} // tslint:disable-line:max-file-line-count
diff --git a/contracts/core/test/utils/order_factory_from_scenario.ts b/contracts/core/test/utils/order_factory_from_scenario.ts
deleted file mode 100644
index ecb4b2e28..000000000
--- a/contracts/core/test/utils/order_factory_from_scenario.ts
+++ /dev/null
@@ -1,294 +0,0 @@
-import {
-    AssetDataScenario,
-    constants,
-    ERC721TokenIdsByOwner,
-    ExpirationTimeSecondsScenario,
-    FeeRecipientAddressScenario,
-    OrderAssetAmountScenario,
-    OrderScenario,
-    TakerScenario,
-} from '@0x/contracts-test-utils';
-import { DummyERC721TokenContract } from '@0x/contracts-tokens';
-import { assetDataUtils, generatePseudoRandomSalt } from '@0x/order-utils';
-import { Order } from '@0x/types';
-import { BigNumber, errorUtils } from '@0x/utils';
-
-const TEN_UNITS_EIGHTEEN_DECIMALS = new BigNumber(10_000_000_000_000_000_000);
-const FIVE_UNITS_EIGHTEEN_DECIMALS = new BigNumber(5_000_000_000_000_000_000);
-const POINT_ONE_UNITS_EIGHTEEN_DECIMALS = new BigNumber(100_000_000_000_000_000);
-const POINT_ZERO_FIVE_UNITS_EIGHTEEN_DECIMALS = new BigNumber(50_000_000_000_000_000);
-const TEN_UNITS_FIVE_DECIMALS = new BigNumber(1_000_000);
-const FIVE_UNITS_FIVE_DECIMALS = new BigNumber(500_000);
-const TEN_UNITS_ZERO_DECIMALS = new BigNumber(10);
-const ONE_THOUSAND_UNITS_ZERO_DECIMALS = new BigNumber(1000);
-const ONE_NFT_UNIT = new BigNumber(1);
-
-export class OrderFactoryFromScenario {
-    private readonly _userAddresses: string[];
-    private readonly _zrxAddress: string;
-    private readonly _nonZrxERC20EighteenDecimalTokenAddresses: string[];
-    private readonly _erc20FiveDecimalTokenAddresses: string[];
-    private readonly _erc20ZeroDecimalTokenAddresses: string[];
-    private readonly _erc721Token: DummyERC721TokenContract;
-    private readonly _erc721Balances: ERC721TokenIdsByOwner;
-    private readonly _exchangeAddress: string;
-    constructor(
-        userAddresses: string[],
-        zrxAddress: string,
-        nonZrxERC20EighteenDecimalTokenAddresses: string[],
-        erc20FiveDecimalTokenAddresses: string[],
-        erc20ZeroDecimalTokenAddresses: string[],
-        erc721Token: DummyERC721TokenContract,
-        erc721Balances: ERC721TokenIdsByOwner,
-        exchangeAddress: string,
-    ) {
-        this._userAddresses = userAddresses;
-        this._zrxAddress = zrxAddress;
-        this._nonZrxERC20EighteenDecimalTokenAddresses = nonZrxERC20EighteenDecimalTokenAddresses;
-        this._erc20FiveDecimalTokenAddresses = erc20FiveDecimalTokenAddresses;
-        this._erc20ZeroDecimalTokenAddresses = erc20ZeroDecimalTokenAddresses;
-        this._erc721Token = erc721Token;
-        this._erc721Balances = erc721Balances;
-        this._exchangeAddress = exchangeAddress;
-    }
-    public generateOrder(orderScenario: OrderScenario): Order {
-        const makerAddress = this._userAddresses[1];
-        let takerAddress = this._userAddresses[2];
-        const erc721MakerAssetIds = this._erc721Balances[makerAddress][this._erc721Token.address];
-        const erc721TakerAssetIds = this._erc721Balances[takerAddress][this._erc721Token.address];
-        let feeRecipientAddress;
-        let makerAssetAmount;
-        let takerAssetAmount;
-        let makerFee;
-        let takerFee;
-        let expirationTimeSeconds;
-        let makerAssetData;
-        let takerAssetData;
-
-        switch (orderScenario.feeRecipientScenario) {
-            case FeeRecipientAddressScenario.BurnAddress:
-                feeRecipientAddress = constants.NULL_ADDRESS;
-                break;
-            case FeeRecipientAddressScenario.EthUserAddress:
-                feeRecipientAddress = this._userAddresses[4];
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('FeeRecipientAddressScenario', orderScenario.feeRecipientScenario);
-        }
-
-        switch (orderScenario.makerAssetDataScenario) {
-            case AssetDataScenario.ZRXFeeToken:
-                makerAssetData = assetDataUtils.encodeERC20AssetData(this._zrxAddress);
-                break;
-            case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                makerAssetData = assetDataUtils.encodeERC20AssetData(this._nonZrxERC20EighteenDecimalTokenAddresses[0]);
-                break;
-            case AssetDataScenario.ERC20FiveDecimals:
-                makerAssetData = assetDataUtils.encodeERC20AssetData(this._erc20FiveDecimalTokenAddresses[0]);
-                break;
-            case AssetDataScenario.ERC721:
-                makerAssetData = assetDataUtils.encodeERC721AssetData(
-                    this._erc721Token.address,
-                    erc721MakerAssetIds[0],
-                );
-                break;
-            case AssetDataScenario.ERC20ZeroDecimals:
-                makerAssetData = assetDataUtils.encodeERC20AssetData(this._erc20ZeroDecimalTokenAddresses[0]);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.makerAssetDataScenario);
-        }
-
-        switch (orderScenario.takerAssetDataScenario) {
-            case AssetDataScenario.ZRXFeeToken:
-                takerAssetData = assetDataUtils.encodeERC20AssetData(this._zrxAddress);
-                break;
-            case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                takerAssetData = assetDataUtils.encodeERC20AssetData(this._nonZrxERC20EighteenDecimalTokenAddresses[1]);
-                break;
-            case AssetDataScenario.ERC20FiveDecimals:
-                takerAssetData = assetDataUtils.encodeERC20AssetData(this._erc20FiveDecimalTokenAddresses[1]);
-                break;
-            case AssetDataScenario.ERC721:
-                takerAssetData = assetDataUtils.encodeERC721AssetData(
-                    this._erc721Token.address,
-                    erc721TakerAssetIds[0],
-                );
-                break;
-            case AssetDataScenario.ERC20ZeroDecimals:
-                takerAssetData = assetDataUtils.encodeERC20AssetData(this._erc20ZeroDecimalTokenAddresses[1]);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.takerAssetDataScenario);
-        }
-
-        switch (orderScenario.makerAssetAmountScenario) {
-            case OrderAssetAmountScenario.Large:
-                switch (orderScenario.makerAssetDataScenario) {
-                    case AssetDataScenario.ZRXFeeToken:
-                    case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                        makerAssetAmount = TEN_UNITS_EIGHTEEN_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC20FiveDecimals:
-                        makerAssetAmount = TEN_UNITS_FIVE_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC721:
-                        makerAssetAmount = ONE_NFT_UNIT;
-                        break;
-                    case AssetDataScenario.ERC20ZeroDecimals:
-                        makerAssetAmount = ONE_THOUSAND_UNITS_ZERO_DECIMALS;
-                        break;
-                    default:
-                        throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.makerAssetDataScenario);
-                }
-                break;
-            case OrderAssetAmountScenario.Small:
-                switch (orderScenario.makerAssetDataScenario) {
-                    case AssetDataScenario.ZRXFeeToken:
-                    case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                        makerAssetAmount = FIVE_UNITS_EIGHTEEN_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC20FiveDecimals:
-                        makerAssetAmount = FIVE_UNITS_FIVE_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC721:
-                        makerAssetAmount = ONE_NFT_UNIT;
-                        break;
-                    case AssetDataScenario.ERC20ZeroDecimals:
-                        makerAssetAmount = TEN_UNITS_ZERO_DECIMALS;
-                        break;
-                    default:
-                        throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.makerAssetDataScenario);
-                }
-                break;
-            case OrderAssetAmountScenario.Zero:
-                makerAssetAmount = new BigNumber(0);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('OrderAssetAmountScenario', orderScenario.makerAssetAmountScenario);
-        }
-
-        switch (orderScenario.takerAssetAmountScenario) {
-            case OrderAssetAmountScenario.Large:
-                switch (orderScenario.takerAssetDataScenario) {
-                    case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                    case AssetDataScenario.ZRXFeeToken:
-                        takerAssetAmount = TEN_UNITS_EIGHTEEN_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC20FiveDecimals:
-                        takerAssetAmount = TEN_UNITS_FIVE_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC721:
-                        takerAssetAmount = ONE_NFT_UNIT;
-                        break;
-                    case AssetDataScenario.ERC20ZeroDecimals:
-                        takerAssetAmount = ONE_THOUSAND_UNITS_ZERO_DECIMALS;
-                        break;
-                    default:
-                        throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.takerAssetDataScenario);
-                }
-                break;
-            case OrderAssetAmountScenario.Small:
-                switch (orderScenario.takerAssetDataScenario) {
-                    case AssetDataScenario.ERC20NonZRXEighteenDecimals:
-                    case AssetDataScenario.ZRXFeeToken:
-                        takerAssetAmount = FIVE_UNITS_EIGHTEEN_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC20FiveDecimals:
-                        takerAssetAmount = FIVE_UNITS_FIVE_DECIMALS;
-                        break;
-                    case AssetDataScenario.ERC721:
-                        takerAssetAmount = ONE_NFT_UNIT;
-                        break;
-                    case AssetDataScenario.ERC20ZeroDecimals:
-                        takerAssetAmount = TEN_UNITS_ZERO_DECIMALS;
-                        break;
-                    default:
-                        throw errorUtils.spawnSwitchErr('AssetDataScenario', orderScenario.takerAssetDataScenario);
-                }
-                break;
-            case OrderAssetAmountScenario.Zero:
-                takerAssetAmount = new BigNumber(0);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('OrderAssetAmountScenario', orderScenario.takerAssetAmountScenario);
-        }
-
-        switch (orderScenario.makerFeeScenario) {
-            case OrderAssetAmountScenario.Large:
-                makerFee = POINT_ONE_UNITS_EIGHTEEN_DECIMALS;
-                break;
-            case OrderAssetAmountScenario.Small:
-                makerFee = POINT_ZERO_FIVE_UNITS_EIGHTEEN_DECIMALS;
-                break;
-            case OrderAssetAmountScenario.Zero:
-                makerFee = new BigNumber(0);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('OrderAssetAmountScenario', orderScenario.makerFeeScenario);
-        }
-
-        switch (orderScenario.takerFeeScenario) {
-            case OrderAssetAmountScenario.Large:
-                takerFee = POINT_ONE_UNITS_EIGHTEEN_DECIMALS;
-                break;
-            case OrderAssetAmountScenario.Small:
-                takerFee = POINT_ZERO_FIVE_UNITS_EIGHTEEN_DECIMALS;
-                break;
-            case OrderAssetAmountScenario.Zero:
-                takerFee = new BigNumber(0);
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr('OrderAssetAmountScenario', orderScenario.takerFeeScenario);
-        }
-
-        switch (orderScenario.expirationTimeSecondsScenario) {
-            case ExpirationTimeSecondsScenario.InFuture:
-                expirationTimeSeconds = new BigNumber(2524604400); // Close to infinite
-                break;
-            case ExpirationTimeSecondsScenario.InPast:
-                expirationTimeSeconds = new BigNumber(0); // Jan 1, 1970
-                break;
-            default:
-                throw errorUtils.spawnSwitchErr(
-                    'ExpirationTimeSecondsScenario',
-                    orderScenario.expirationTimeSecondsScenario,
-                );
-        }
-
-        switch (orderScenario.takerScenario) {
-            case TakerScenario.CorrectlySpecified:
-                break; // noop since takerAddress is already specified
-
-            case TakerScenario.IncorrectlySpecified:
-                const notTaker = this._userAddresses[3];
-                takerAddress = notTaker;
-                break;
-
-            case TakerScenario.Unspecified:
-                takerAddress = constants.NULL_ADDRESS;
-                break;
-
-            default:
-                throw errorUtils.spawnSwitchErr('TakerScenario', orderScenario.takerScenario);
-        }
-
-        const order = {
-            senderAddress: constants.NULL_ADDRESS,
-            makerAddress,
-            takerAddress,
-            makerFee,
-            takerFee,
-            makerAssetAmount,
-            takerAssetAmount,
-            makerAssetData,
-            takerAssetData,
-            salt: generatePseudoRandomSalt(),
-            exchangeAddress: this._exchangeAddress,
-            feeRecipientAddress,
-            expirationTimeSeconds,
-        };
-
-        return order;
-    }
-}
diff --git a/contracts/core/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts b/contracts/core/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts
deleted file mode 100644
index 64b7dedbe..000000000
--- a/contracts/core/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import { AbstractBalanceAndProxyAllowanceFetcher } from '@0x/order-utils';
-import { BigNumber } from '@0x/utils';
-
-import { AssetWrapper } from './asset_wrapper';
-
-export class SimpleAssetBalanceAndProxyAllowanceFetcher implements AbstractBalanceAndProxyAllowanceFetcher {
-    private readonly _assetWrapper: AssetWrapper;
-    constructor(assetWrapper: AssetWrapper) {
-        this._assetWrapper = assetWrapper;
-    }
-    public async getBalanceAsync(assetData: string, userAddress: string): Promise<BigNumber> {
-        const balance = await this._assetWrapper.getBalanceAsync(userAddress, assetData);
-        return balance;
-    }
-    public async getProxyAllowanceAsync(assetData: string, userAddress: string): Promise<BigNumber> {
-        const proxyAllowance = await this._assetWrapper.getProxyAllowanceAsync(userAddress, assetData);
-        return proxyAllowance;
-    }
-}
diff --git a/contracts/core/test/utils/simple_order_filled_cancelled_fetcher.ts b/contracts/core/test/utils/simple_order_filled_cancelled_fetcher.ts
deleted file mode 100644
index af959e00e..000000000
--- a/contracts/core/test/utils/simple_order_filled_cancelled_fetcher.ts
+++ /dev/null
@@ -1,31 +0,0 @@
-import { AbstractOrderFilledCancelledFetcher, orderHashUtils } from '@0x/order-utils';
-import { SignedOrder } from '@0x/types';
-import { BigNumber } from '@0x/utils';
-
-import { ExchangeWrapper } from './exchange_wrapper';
-
-export class SimpleOrderFilledCancelledFetcher implements AbstractOrderFilledCancelledFetcher {
-    private readonly _exchangeWrapper: ExchangeWrapper;
-    private readonly _zrxAssetData: string;
-    constructor(exchange: ExchangeWrapper, zrxAssetData: string) {
-        this._exchangeWrapper = exchange;
-        this._zrxAssetData = zrxAssetData;
-    }
-    public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
-        const filledTakerAmount = new BigNumber(await this._exchangeWrapper.getTakerAssetFilledAmountAsync(orderHash));
-        return filledTakerAmount;
-    }
-    public async isOrderCancelledAsync(signedOrder: SignedOrder): Promise<boolean> {
-        const orderHash = orderHashUtils.getOrderHashHex(signedOrder);
-        const isCancelled = await this._exchangeWrapper.isCancelledAsync(orderHash);
-        const orderEpoch = await this._exchangeWrapper.getOrderEpochAsync(
-            signedOrder.makerAddress,
-            signedOrder.senderAddress,
-        );
-        const isCancelledByOrderEpoch = orderEpoch > signedOrder.salt;
-        return isCancelled || isCancelledByOrderEpoch;
-    }
-    public getZRXAssetData(): string {
-        return this._zrxAssetData;
-    }
-}
diff --git a/contracts/core/tsconfig.json b/contracts/core/tsconfig.json
deleted file mode 100644
index db872fc32..000000000
--- a/contracts/core/tsconfig.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-    "extends": "../../tsconfig",
-    "compilerOptions": {
-        "outDir": "lib",
-        "rootDir": ".",
-        "resolveJsonModule": true
-    },
-    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
-    "files": [
-        "./generated-artifacts/AssetProxyOwner.json",
-        "./generated-artifacts/ERC20Proxy.json",
-        "./generated-artifacts/ERC721Proxy.json",
-        "./generated-artifacts/Exchange.json",
-        "./generated-artifacts/MixinAuthorizable.json",
-        "./generated-artifacts/MultiAssetProxy.json",
-        "./generated-artifacts/TestAssetProxyDispatcher.json",
-        "./generated-artifacts/TestAssetProxyOwner.json",
-        "./generated-artifacts/TestExchangeInternals.json",
-        "./generated-artifacts/TestSignatureValidator.json",
-        "./generated-artifacts/TestStaticCallReceiver.json"
-    ],
-    "exclude": ["./deploy/solc/solc_bin"]
-}
diff --git a/contracts/core/tslint.json b/contracts/core/tslint.json
deleted file mode 100644
index 1bb3ac2a2..000000000
--- a/contracts/core/tslint.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-    "extends": ["@0x/tslint-config"],
-    "rules": {
-        "custom-no-magic-numbers": false
-    }
-}