Merge pull request #1413 from 0xProject/feature/contracts-monorepo-7

Contracts monorepo 7

112 files changed, 519 insertions, 451 deletions

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 6bb8d903d..6e018c62d 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -44,7 +44,8 @@ jobs:
             - run: yarn wsrun test:circleci @0x/contracts-utils
             - run: yarn wsrun test:circleci @0x/contracts-libs
             - run: yarn wsrun test:circleci @0x/contracts-tokens
-            - run: yarn wsrun test:circleci @0x/contracts-core
+            - run: yarn wsrun test:circleci @0x/contracts-extensions
+            - run: yarn wsrun test:circleci @0x/contracts-protocol
     test-contracts-geth:
         docker:
             - image: circleci/node:9
@@ -60,7 +61,8 @@ jobs:
             - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-utils
             - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-libs
             - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-tokens
-            - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-core
+            - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-extensions
+            - run: TEST_PROVIDER=geth yarn wsrun test @0x/contracts-protocol
     test-publish:
         resource_class: medium+
         docker:
diff --git a/.gitignore b/.gitignore
index 207739cda..1d4410e25 100644
--- a/.gitignore
+++ b/.gitignore
@@ -83,23 +83,27 @@ packages/react-docs/example/public/bundle*
 packages/testnet-faucets/server/
 
 # generated contract artifacts/
-contracts/core/generated-artifacts/
+contracts/protocol/generated-artifacts/
 contracts/multisig/generated-artifacts/
 contracts/utils/generated-artifacts/
 contracts/libs/generated-artifacts/
 contracts/interfaces/generated-artifacts/
 contracts/tokens/generated-artifacts/
+contracts/examples/generated-artifacts/
+contracts/extensions/generated-artifacts/
 packages/sol-cov/test/fixtures/artifacts/
 packages/metacoin/artifacts/
 
 # generated contract wrappers
 packages/abi-gen-wrappers/wrappers
-contracts/core/generated-wrappers/
+contracts/protocol/generated-wrappers/
 contracts/multisig/generated-wrappers/
 contracts/utils/generated-wrappers/
 contracts/libs/generated-wrappers/
 contracts/interfaces/generated-wrappers/
 contracts/tokens/generated-wrappers/
+contracts/examples/generated-wrappers/
+contracts/extensions/generated-wrappers/
 packages/metacoin/src/contract_wrappers
 
 # solc-bin in sol-compiler
diff --git a/.prettierignore b/.prettierignore
index 4da37ae6e..7f8662b0a 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,7 +1,7 @@
 lib
 .nyc_output
-/contracts/core/generated-wrappers
-/contracts/core/generated-artifacts
+/contracts/protocol/generated-wrappers
+/contracts/protocol/generated-artifacts
 /contracts/multisig/generated-wrappers
 /contracts/multisig/generated-artifacts
 /contracts/utils/generated-wrappers
@@ -12,6 +12,10 @@ lib
 /contracts/interfaces/generated-artifacts
 /contracts/tokens/generated-wrappers
 /contracts/tokens/generated-artifacts
+/contracts/examples/generated-wrappers
+/contracts/examples/generated-artifacts
+/contracts/extensions/generated-wrappers
+/contracts/extensions/generated-artifacts
 /packages/abi-gen-wrappers/src/generated-wrappers
 /packages/contract-artifacts/artifacts
 /python-packages/order_utils/src/zero_ex/contract_artifacts/artifacts
diff --git a/contracts/core/.solhint.json b/contracts/.solhint.json
index 076afe9f3..076afe9f3 100644
--- a/contracts/core/.solhint.json
+++ b/contracts/.solhint.json
diff --git a/contracts/core/test/tutorials/arbitrage.ts b/contracts/core/test/tutorials/arbitrage.ts
deleted file mode 100644
index 78e0bc238..000000000
--- a/contracts/core/test/tutorials/arbitrage.ts
+++ /dev/null
@@ -1,260 +0,0 @@
-// import { ECSignature, SignedOrder, ZeroEx } from '0x.js';
-// import { BlockchainLifecycle, devConstants, web3Factory } from '@0x/dev-utils';
-// import { ExchangeContractErrs } from 'ethereum-types';
-// import { BigNumber } from '@0x/utils';
-// import { Web3Wrapper } from '@0x/web3-wrapper';
-// import * as chai from 'chai';
-// import ethUtil = require('ethereumjs-util');
-// import * as Web3 from 'web3';
-
-// import { AccountLevelsContract } from '../../src/generated_contract_wrappers/account_levels';
-// import { ArbitrageContract } from '../../src/generated_contract_wrappers/arbitrage';
-// import { DummyTokenContract } from '../../src/generated_contract_wrappers/dummy_token';
-// import { EtherDeltaContract } from '../../src/generated_contract_wrappers/ether_delta';
-// import { ExchangeContract } from '../../src/generated_contract_wrappers/exchange';
-// import { TokenTransferProxyContract } from '../../src/generated_contract_wrappers/token_transfer_proxy';
-// import { artifacts } from '../../util/artifacts';
-// import { Balances } from '../../util/balances';
-// import { constants } from '../../util/constants';
-// import { crypto } from '../../util/crypto';
-// import { ExchangeWrapper } from '../../util/exchange_wrapper';
-// import { OrderFactory } from '../../util/order_factory';
-// import { BalancesByOwner, ContractName } from '../../util/types';
-// import { chaiSetup } from '../utils/chai_setup';
-
-// import { provider, txDefaults, web3Wrapper } from '../utils/web3_wrapper';
-
-// chaiSetup.configure();
-// const expect = chai.expect;
-// const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
-
-// describe('Arbitrage', () => {
-//     let coinbase: string;
-//     let maker: string;
-//     let edMaker: string;
-//     let edFrontRunner: string;
-//     let amountGet: BigNumber;
-//     let amountGive: BigNumber;
-//     let makerTokenAmount: BigNumber;
-//     let takerTokenAmount: BigNumber;
-//     const feeRecipient = constants.NULL_ADDRESS;
-//     const INITIAL_BALANCE = ZeroEx.toBaseUnitAmount(new BigNumber(10000), 18);
-//     const INITIAL_ALLOWANCE = ZeroEx.toBaseUnitAmount(new BigNumber(10000), 18);
-
-//     let weth: DummyTokenContract;
-//     let zrx: DummyTokenContract;
-//     let arbitrage: ArbitrageContract;
-//     let etherDelta: EtherDeltaContract;
-
-//     let signedOrder: SignedOrder;
-//     let exWrapper: ExchangeWrapper;
-//     let orderFactory: OrderFactory;
-
-//     let zeroEx: ZeroEx;
-
-//     // From a bird's eye view - we create two orders.
-//     // 0x order of 1 ZRX (maker) for 1 WETH (taker)
-//     // ED order of 2 WETH (tokenGive) for 1 ZRX (tokenGet)
-//     // And then we do an atomic arbitrage between them which gives us 1 WETH.
-//     before(async () => {
-//         const accounts = await web3Wrapper.getAvailableAddressesAsync();
-//         [coinbase, maker, edMaker, edFrontRunner] = accounts;
-//         weth = await DummyTokenContract.deployFrom0xArtifactAsync(
-//             artifacts.DummyToken,
-//             provider,
-//             txDefaults,
-//             constants.DUMMY_TOKEN_NAME,
-//             constants.DUMMY_TOKEN_SYMBOL,
-//             constants.DUMMY_TOKEN_DECIMALS,
-//             constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-//         );
-//         zrx = await DummyTokenContract.deployFrom0xArtifactAsync(
-//             artifacts.DummyToken,
-//             provider,
-//             txDefaults,
-//             constants.DUMMY_TOKEN_NAME,
-//             constants.DUMMY_TOKEN_SYMBOL,
-//             constants.DUMMY_TOKEN_DECIMALS,
-//             constants.DUMMY_TOKEN_TOTAL_SUPPLY,
-//         );
-//         const accountLevels = await AccountLevelsContract.deployFrom0xArtifactAsync(
-//             artifacts.AccountLevels,
-//             provider,
-//             txDefaults,
-//         );
-//         const edAdminAddress = accounts[0];
-//         const edMakerFee = new BigNumber(0);
-//         const edTakerFee = new BigNumber(0);
-//         const edFeeRebate = new BigNumber(0);
-//         etherDelta = await EtherDeltaContract.deployFrom0xArtifactAsync(
-//             artifacts.EtherDelta,
-//             provider,
-//             txDefaults,
-//             edAdminAddress,
-//             feeRecipient,
-//             accountLevels.address,
-//             edMakerFee,
-//             edTakerFee,
-//             edFeeRebate,
-//         );
-//         const tokenTransferProxy = await TokenTransferProxyContract.deployFrom0xArtifactAsync(
-//             artifacts.TokenTransferProxy,
-//             provider,
-//             txDefaults,
-//         );
-//         const exchange = await ExchangeContract.deployFrom0xArtifactAsync(
-//             artifacts.Exchange,
-//             provider,
-//             txDefaults,
-//             zrx.address,
-//             tokenTransferProxy.address,
-//         );
-//         await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: accounts[0] });
-//         zeroEx = new ZeroEx(provider, {
-//             exchangeContractAddress: exchange.address,
-//             networkId: constants.TESTRPC_NETWORK_ID,
-//         });
-//         exWrapper = new ExchangeWrapper(exchange, provider);
-
-//         makerTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(1), 18);
-//         takerTokenAmount = makerTokenAmount;
-//         const defaultOrderParams = {
-//             exchangeContractAddress: exchange.address,
-//             maker,
-//             feeRecipient,
-//             makerTokenAddress: zrx.address,
-//             takerTokenAddress: weth.address,
-//             makerTokenAmount,
-//             takerTokenAmount,
-//             makerFee: new BigNumber(0),
-//             takerFee: new BigNumber(0),
-//         };
-//         orderFactory = new OrderFactory(zeroEx, defaultOrderParams);
-//         arbitrage = await ArbitrageContract.deployFrom0xArtifactAsync(
-//             artifacts.Arbitrage,
-//             provider,
-//             txDefaults,
-//             exchange.address,
-//             etherDelta.address,
-//             tokenTransferProxy.address,
-//         );
-//         // Enable arbitrage and withdrawals of tokens
-//         await arbitrage.setAllowances.sendTransactionAsync(weth.address, { from: coinbase });
-//         await arbitrage.setAllowances.sendTransactionAsync(zrx.address, { from: coinbase });
-
-//         // Give some tokens to arbitrage contract
-//         await weth.setBalance.sendTransactionAsync(arbitrage.address, takerTokenAmount, { from: coinbase });
-
-//         // Fund the maker on exchange side
-//         await zrx.setBalance.sendTransactionAsync(maker, makerTokenAmount, { from: coinbase });
-//         // Set the allowance for the maker on Exchange side
-//         await zrx.approve.sendTransactionAsync(tokenTransferProxy.address, INITIAL_ALLOWANCE, { from: maker });
-
-//         amountGive = ZeroEx.toBaseUnitAmount(new BigNumber(2), 18);
-//         // Fund the maker on EtherDelta side
-//         await weth.setBalance.sendTransactionAsync(edMaker, amountGive, { from: coinbase });
-//         // Set the allowance for the maker on EtherDelta side
-//         await weth.approve.sendTransactionAsync(etherDelta.address, INITIAL_ALLOWANCE, { from: edMaker });
-//         // Deposit maker funds into EtherDelta
-//         await etherDelta.depositToken.sendTransactionAsync(weth.address, amountGive, { from: edMaker });
-
-//         amountGet = makerTokenAmount;
-//         // Fund the front runner on EtherDelta side
-//         await zrx.setBalance.sendTransactionAsync(edFrontRunner, amountGet, { from: coinbase });
-//         // Set the allowance for the front-runner on EtherDelta side
-//         await zrx.approve.sendTransactionAsync(etherDelta.address, INITIAL_ALLOWANCE, { from: edFrontRunner });
-//         // Deposit front runner funds into EtherDelta
-//         await etherDelta.depositToken.sendTransactionAsync(zrx.address, amountGet, { from: edFrontRunner });
-//     });
-//     beforeEach(async () => {
-//         await blockchainLifecycle.startAsync();
-//     });
-//     afterEach(async () => {
-//         await blockchainLifecycle.revertAsync();
-//     });
-//     describe('makeAtomicTrade', () => {
-//         let addresses: string[];
-//         let values: BigNumber[];
-//         let v: number[];
-//         let r: string[];
-//         let s: string[];
-//         let tokenGet: string;
-//         let tokenGive: string;
-//         let expires: BigNumber;
-//         let nonce: BigNumber;
-//         let edSignature: ECSignature;
-//         before(async () => {
-//             signedOrder = await orderFactory.newSignedOrderAsync();
-//             tokenGet = zrx.address;
-//             tokenGive = weth.address;
-//             const blockNumber = await web3Wrapper.getBlockNumberAsync();
-//             const ED_ORDER_EXPIRATION_IN_BLOCKS = 10;
-//             expires = new BigNumber(blockNumber + ED_ORDER_EXPIRATION_IN_BLOCKS);
-//             nonce = new BigNumber(42);
-//             const edOrderHash = `0x${crypto
-//                 .solSHA256([etherDelta.address, tokenGet, amountGet, tokenGive, amountGive, expires, nonce])
-//                 .toString('hex')}`;
-//             const shouldAddPersonalMessagePrefix = false;
-//             edSignature = await zeroEx.signOrderHashAsync(edOrderHash, edMaker, shouldAddPersonalMessagePrefix);
-//             addresses = [
-//                 signedOrder.maker,
-//                 signedOrder.taker,
-//                 signedOrder.makerTokenAddress,
-//                 signedOrder.takerTokenAddress,
-//                 signedOrder.feeRecipient,
-//                 edMaker,
-//             ];
-//             const fillTakerTokenAmount = takerTokenAmount;
-//             const edFillAmount = makerTokenAmount;
-//             values = [
-//                 signedOrder.makerTokenAmount,
-//                 signedOrder.takerTokenAmount,
-//                 signedOrder.makerFee,
-//                 signedOrder.takerFee,
-//                 signedOrder.expirationUnixTimestampSec,
-//                 signedOrder.salt,
-//                 fillTakerTokenAmount,
-//                 amountGet,
-//                 amountGive,
-//                 expires,
-//                 nonce,
-//                 edFillAmount,
-//             ];
-//             v = [signedOrder.ecSignature.v, edSignature.v];
-//             r = [signedOrder.ecSignature.r, edSignature.r];
-//             s = [signedOrder.ecSignature.s, edSignature.s];
-//         });
-//         it('should successfully execute the arbitrage if not front-runned', async () => {
-//             const txHash = await arbitrage.makeAtomicTrade.sendTransactionAsync(addresses, values, v, r, s, {
-//                 from: coinbase,
-//             });
-//             const res = await zeroEx.awaitTransactionMinedAsync(txHash);
-//             const postBalance = await weth.balanceOf.callAsync(arbitrage.address);
-//             expect(postBalance).to.be.bignumber.equal(amountGive);
-//         });
-//         it('should fail and revert if front-runned', async () => {
-//             const preBalance = await weth.balanceOf.callAsync(arbitrage.address);
-//             // Front-running transaction
-//             await etherDelta.trade.sendTransactionAsync(
-//                 tokenGet,
-//                 amountGet,
-//                 tokenGive,
-//                 amountGive,
-//                 expires,
-//                 nonce,
-//                 edMaker,
-//                 edSignature.v,
-//                 edSignature.r,
-//                 edSignature.s,
-//                 amountGet,
-//                 { from: edFrontRunner },
-//             );
-//             // tslint:disable-next-line:await-promise
-//             await expect(
-//                 arbitrage.makeAtomicTrade.sendTransactionAsync(addresses, values, v, r, s, { from: coinbase }),
-//             ).to.be.rejectedWith(constants.REVERT);
-//             const postBalance = await weth.balanceOf.callAsync(arbitrage.address);
-//             expect(preBalance).to.be.bignumber.equal(postBalance);
-//         });
-//     });
-// });
diff --git a/contracts/examples/README.md b/contracts/examples/README.md
new file mode 100644
index 000000000..ca23d0974
--- /dev/null
+++ b/contracts/examples/README.md
@@ -0,0 +1,56 @@
+## Contract examples
+
+Example smart contracts that interact with 0x protocol.
+
+## Usage
+
+Contracts can be found in the [contracts](./contracts) directory.
+This package contains example implementations of contracts that interact with the protocol but are _not_ intended for use in production. Examples include [filter](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#filter-contracts) contracts, a [Wallet](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#wallet) contract, and a [Validator](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#validator) contract, among others.
+
+## 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-examples yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/contracts-examples yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
diff --git a/contracts/examples/compiler.json b/contracts/examples/compiler.json
new file mode 100644
index 000000000..375fa0c55
--- /dev/null
+++ b/contracts/examples/compiler.json
@@ -0,0 +1,22 @@
+{
+    "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": ["ExchangeWrapper", "Validator", "Wallet", "Whitelist"]
+}
diff --git a/contracts/core/contracts/examples/ExchangeWrapper/ExchangeWrapper.sol b/contracts/examples/contracts/ExchangeWrapper/ExchangeWrapper.sol
index d98136922..d98136922 100644
--- a/contracts/core/contracts/examples/ExchangeWrapper/ExchangeWrapper.sol
+++ b/contracts/examples/contracts/ExchangeWrapper/ExchangeWrapper.sol
diff --git a/contracts/core/contracts/examples/Validator/Validator.sol b/contracts/examples/contracts/Validator/Validator.sol
index e488a9ca7..e488a9ca7 100644
--- a/contracts/core/contracts/examples/Validator/Validator.sol
+++ b/contracts/examples/contracts/Validator/Validator.sol
diff --git a/contracts/core/contracts/examples/Wallet/Wallet.sol b/contracts/examples/contracts/Wallet/Wallet.sol
index 8edc74eb3..8edc74eb3 100644
--- a/contracts/core/contracts/examples/Wallet/Wallet.sol
+++ b/contracts/examples/contracts/Wallet/Wallet.sol
diff --git a/contracts/core/contracts/examples/Whitelist/Whitelist.sol b/contracts/examples/contracts/Whitelist/Whitelist.sol
index 2a3d33738..2a3d33738 100644
--- a/contracts/core/contracts/examples/Whitelist/Whitelist.sol
+++ b/contracts/examples/contracts/Whitelist/Whitelist.sol
diff --git a/contracts/examples/package.json b/contracts/examples/package.json
new file mode 100644
index 000000000..541a67f2c
--- /dev/null
+++ b/contracts/examples/package.json
@@ -0,0 +1,83 @@
+{
+    "private": true,
+    "name": "@0x/contracts-examples",
+    "version": "1.0.0",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Smart contract examples 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",
+        "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",
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "generated-artifacts/@(ExchangeWrapper|Validator|Wallet|Whitelist).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/examples/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": "^1.4.1",
+        "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-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/examples/src/artifacts/index.ts b/contracts/examples/src/artifacts/index.ts
new file mode 100644
index 000000000..c921fbf89
--- /dev/null
+++ b/contracts/examples/src/artifacts/index.ts
@@ -0,0 +1,13 @@
+import { ContractArtifact } from 'ethereum-types';
+
+import * as ExchangeWrapper from '../../generated-artifacts/ExchangeWrapper.json';
+import * as Validator from '../../generated-artifacts/Validator.json';
+import * as Wallet from '../../generated-artifacts/Wallet.json';
+import * as Whitelist from '../../generated-artifacts/Whitelist.json';
+
+export const artifacts = {
+    ExchangeWrapper: ExchangeWrapper as ContractArtifact,
+    Validator: Validator as ContractArtifact,
+    Wallet: Wallet as ContractArtifact,
+    Whitelist: Whitelist as ContractArtifact,
+};
diff --git a/contracts/core/src/index.ts b/contracts/examples/src/index.ts
index d55f08ea2..d55f08ea2 100644
--- a/contracts/core/src/index.ts
+++ b/contracts/examples/src/index.ts
diff --git a/contracts/examples/src/wrappers/index.ts b/contracts/examples/src/wrappers/index.ts
new file mode 100644
index 000000000..dc67277d7
--- /dev/null
+++ b/contracts/examples/src/wrappers/index.ts
@@ -0,0 +1,4 @@
+export * from '../../generated-wrappers/exchange_wrapper';
+export * from '../../generated-wrappers/validator';
+export * from '../../generated-wrappers/wallet';
+export * from '../../generated-wrappers/whitelist';
diff --git a/contracts/examples/tsconfig.json b/contracts/examples/tsconfig.json
new file mode 100644
index 000000000..63245da1e
--- /dev/null
+++ b/contracts/examples/tsconfig.json
@@ -0,0 +1,16 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": ".",
+        "resolveJsonModule": true
+    },
+    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
+    "files": [
+        "./generated-artifacts/ExchangeWrapper.json",
+        "./generated-artifacts/Validator.json",
+        "./generated-artifacts/Wallet.json",
+        "./generated-artifacts/Whitelist.json"
+    ],
+    "exclude": ["./deploy/solc/solc_bin"]
+}
diff --git a/contracts/core/tslint.json b/contracts/examples/tslint.json
index 1bb3ac2a2..1bb3ac2a2 100644
--- a/contracts/core/tslint.json
+++ b/contracts/examples/tslint.json
diff --git a/contracts/extensions/README.md b/contracts/extensions/README.md
new file mode 100644
index 000000000..820f6e78a
--- /dev/null
+++ b/contracts/extensions/README.md
@@ -0,0 +1,69 @@
+## Contract extensions
+
+Smart contracts that implement extensions for the 0x protocol.
+
+## Usage
+
+Contract extensions of the protocol can be found in the [contracts](./contracts) directory. This directory contains contracts that interact with the 2.0.0 contracts and will be used in production, such as the [Forwarder](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract.
+
+## 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-extensions yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/contracts-extensions 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/extensions/compiler.json b/contracts/extensions/compiler.json
new file mode 100644
index 000000000..69d607b3e
--- /dev/null
+++ b/contracts/extensions/compiler.json
@@ -0,0 +1,22 @@
+{
+    "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": ["DutchAuction", "Forwarder"]
+}
diff --git a/contracts/core/contracts/extensions/DutchAuction/DutchAuction.sol b/contracts/extensions/contracts/DutchAuction/DutchAuction.sol
index 9c9f3990a..9c9f3990a 100644
--- a/contracts/core/contracts/extensions/DutchAuction/DutchAuction.sol
+++ b/contracts/extensions/contracts/DutchAuction/DutchAuction.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/Forwarder.sol b/contracts/extensions/contracts/Forwarder/Forwarder.sol
index 94dec40ed..94dec40ed 100644
--- a/contracts/core/contracts/extensions/Forwarder/Forwarder.sol
+++ b/contracts/extensions/contracts/Forwarder/Forwarder.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/MixinAssets.sol b/contracts/extensions/contracts/Forwarder/MixinAssets.sol
index 3ebf75161..3ebf75161 100644
--- a/contracts/core/contracts/extensions/Forwarder/MixinAssets.sol
+++ b/contracts/extensions/contracts/Forwarder/MixinAssets.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/MixinExchangeWrapper.sol b/contracts/extensions/contracts/Forwarder/MixinExchangeWrapper.sol
index 210eb14c2..210eb14c2 100644
--- a/contracts/core/contracts/extensions/Forwarder/MixinExchangeWrapper.sol
+++ b/contracts/extensions/contracts/Forwarder/MixinExchangeWrapper.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/MixinForwarderCore.sol b/contracts/extensions/contracts/Forwarder/MixinForwarderCore.sol
index bab78d79b..bab78d79b 100644
--- a/contracts/core/contracts/extensions/Forwarder/MixinForwarderCore.sol
+++ b/contracts/extensions/contracts/Forwarder/MixinForwarderCore.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/MixinWeth.sol b/contracts/extensions/contracts/Forwarder/MixinWeth.sol
index 2a281f3ae..2a281f3ae 100644
--- a/contracts/core/contracts/extensions/Forwarder/MixinWeth.sol
+++ b/contracts/extensions/contracts/Forwarder/MixinWeth.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/interfaces/IAssets.sol b/contracts/extensions/contracts/Forwarder/interfaces/IAssets.sol
index 1e034c003..1e034c003 100644
--- a/contracts/core/contracts/extensions/Forwarder/interfaces/IAssets.sol
+++ b/contracts/extensions/contracts/Forwarder/interfaces/IAssets.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/interfaces/IForwarder.sol b/contracts/extensions/contracts/Forwarder/interfaces/IForwarder.sol
index f5a26e2ba..f5a26e2ba 100644
--- a/contracts/core/contracts/extensions/Forwarder/interfaces/IForwarder.sol
+++ b/contracts/extensions/contracts/Forwarder/interfaces/IForwarder.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/interfaces/IForwarderCore.sol b/contracts/extensions/contracts/Forwarder/interfaces/IForwarderCore.sol
index eede20bb8..eede20bb8 100644
--- a/contracts/core/contracts/extensions/Forwarder/interfaces/IForwarderCore.sol
+++ b/contracts/extensions/contracts/Forwarder/interfaces/IForwarderCore.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/libs/LibConstants.sol b/contracts/extensions/contracts/Forwarder/libs/LibConstants.sol
index 4a81abf76..4a81abf76 100644
--- a/contracts/core/contracts/extensions/Forwarder/libs/LibConstants.sol
+++ b/contracts/extensions/contracts/Forwarder/libs/LibConstants.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/libs/LibForwarderErrors.sol b/contracts/extensions/contracts/Forwarder/libs/LibForwarderErrors.sol
index fb3ade1db..fb3ade1db 100644
--- a/contracts/core/contracts/extensions/Forwarder/libs/LibForwarderErrors.sol
+++ b/contracts/extensions/contracts/Forwarder/libs/LibForwarderErrors.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/mixins/MAssets.sol b/contracts/extensions/contracts/Forwarder/mixins/MAssets.sol
index 9e7f80d97..9e7f80d97 100644
--- a/contracts/core/contracts/extensions/Forwarder/mixins/MAssets.sol
+++ b/contracts/extensions/contracts/Forwarder/mixins/MAssets.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/mixins/MExchangeWrapper.sol b/contracts/extensions/contracts/Forwarder/mixins/MExchangeWrapper.sol
index d9e71786a..d9e71786a 100644
--- a/contracts/core/contracts/extensions/Forwarder/mixins/MExchangeWrapper.sol
+++ b/contracts/extensions/contracts/Forwarder/mixins/MExchangeWrapper.sol
diff --git a/contracts/core/contracts/extensions/Forwarder/mixins/MWeth.sol b/contracts/extensions/contracts/Forwarder/mixins/MWeth.sol
index 88e77be4e..88e77be4e 100644
--- a/contracts/core/contracts/extensions/Forwarder/mixins/MWeth.sol
+++ b/contracts/extensions/contracts/Forwarder/mixins/MWeth.sol
diff --git a/contracts/extensions/package.json b/contracts/extensions/package.json
new file mode 100644
index 000000000..c09f69e43
--- /dev/null
+++ b/contracts/extensions/package.json
@@ -0,0 +1,95 @@
+{
+    "private": true,
+    "name": "@0x/contracts-extensions",
+    "version": "1.0.0",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Smart contract extensions 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 -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "generated-artifacts/@(DutchAuction|Forwarder).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/extensions/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": "^1.4.1",
+        "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-utils": "^1.0.0",
+        "@0x/contracts-protocol": "^2.1.56",
+        "@0x/contracts-tokens": "^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/extensions/src/artifacts/index.ts b/contracts/extensions/src/artifacts/index.ts
new file mode 100644
index 000000000..7588178f0
--- /dev/null
+++ b/contracts/extensions/src/artifacts/index.ts
@@ -0,0 +1,9 @@
+import { ContractArtifact } from 'ethereum-types';
+
+import * as DutchAuction from '../../generated-artifacts/DutchAuction.json';
+import * as Forwarder from '../../generated-artifacts/Forwarder.json';
+
+export const artifacts = {
+    DutchAuction: DutchAuction as ContractArtifact,
+    Forwarder: Forwarder as ContractArtifact,
+};
diff --git a/contracts/extensions/src/index.ts b/contracts/extensions/src/index.ts
new file mode 100644
index 000000000..d55f08ea2
--- /dev/null
+++ b/contracts/extensions/src/index.ts
@@ -0,0 +1,2 @@
+export * from './artifacts';
+export * from './wrappers';
diff --git a/contracts/extensions/src/wrappers/index.ts b/contracts/extensions/src/wrappers/index.ts
new file mode 100644
index 000000000..90880e37f
--- /dev/null
+++ b/contracts/extensions/src/wrappers/index.ts
@@ -0,0 +1,2 @@
+export * from '../../generated-wrappers/dutch_auction';
+export * from '../../generated-wrappers/forwarder';
diff --git a/contracts/core/test/extensions/dutch_auction.ts b/contracts/extensions/test/extensions/dutch_auction.ts
index b396d4206..6c3b2f0f3 100644
--- a/contracts/core/test/extensions/dutch_auction.ts
+++ b/contracts/extensions/test/extensions/dutch_auction.ts
@@ -1,4 +1,11 @@
 import {
+    artifacts as protocolArtifacts,
+    ERC20Wrapper,
+    ERC721Wrapper,
+    ExchangeContract,
+    ExchangeWrapper,
+} from '@0x/contracts-protocol';
+import {
     chaiSetup,
     constants,
     ContractName,
@@ -27,11 +34,7 @@ import * as ethUtil from 'ethereumjs-util';
 import * as _ from 'lodash';
 
 import { DutchAuctionContract } from '../../generated-wrappers/dutch_auction';
-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;
@@ -106,7 +109,7 @@ describe(ContractName.DutchAuction, () => {
 
         const zrxAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
         const exchangeInstance = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
+            protocolArtifacts.Exchange,
             provider,
             txDefaults,
             zrxAssetData,
diff --git a/contracts/core/test/extensions/forwarder.ts b/contracts/extensions/test/extensions/forwarder.ts
index ffa015dd2..4027f493d 100644
--- a/contracts/core/test/extensions/forwarder.ts
+++ b/contracts/extensions/test/extensions/forwarder.ts
@@ -1,4 +1,11 @@
 import {
+    artifacts as protocolArtifacts,
+    ERC20Wrapper,
+    ERC721Wrapper,
+    ExchangeContract,
+    ExchangeWrapper,
+} from '@0x/contracts-protocol';
+import {
     chaiSetup,
     constants,
     ContractName,
@@ -25,12 +32,9 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
 import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 
-import { ExchangeContract } from '../../generated-wrappers/exchange';
 import { ForwarderContract } from '../../generated-wrappers/forwarder';
 import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
+
 import { ForwarderWrapper } from '../utils/forwarder_wrapper';
 
 chaiSetup.configure();
@@ -104,7 +108,7 @@ describe(ContractName.Forwarder, () => {
         wethAssetData = assetDataUtils.encodeERC20AssetData(wethContract.address);
         zrxAssetData = assetDataUtils.encodeERC20AssetData(zrxToken.address);
         const exchangeInstance = await ExchangeContract.deployFrom0xArtifactAsync(
-            artifacts.Exchange,
+            protocolArtifacts.Exchange,
             provider,
             txDefaults,
             zrxAssetData,
@@ -175,7 +179,7 @@ describe(ContractName.Forwarder, () => {
     describe('constructor', () => {
         it('should revert if assetProxy is unregistered', async () => {
             const exchangeInstance = await ExchangeContract.deployFrom0xArtifactAsync(
-                artifacts.Exchange,
+                protocolArtifacts.Exchange,
                 provider,
                 txDefaults,
                 zrxAssetData,
diff --git a/contracts/core/test/global_hooks.ts b/contracts/extensions/test/global_hooks.ts
index f8ace376a..f8ace376a 100644
--- a/contracts/core/test/global_hooks.ts
+++ b/contracts/extensions/test/global_hooks.ts
diff --git a/contracts/core/test/utils/forwarder_wrapper.ts b/contracts/extensions/test/utils/forwarder_wrapper.ts
index 4c78ecd79..9e44ff6b9 100644
--- a/contracts/core/test/utils/forwarder_wrapper.ts
+++ b/contracts/extensions/test/utils/forwarder_wrapper.ts
@@ -1,3 +1,4 @@
+import { artifacts as protocolArtifacts } from '@0x/contracts-protocol';
 import { constants, formatters, LogDecoder, MarketSellOrders } from '@0x/contracts-test-utils';
 import { artifacts as tokensArtifacts } from '@0x/contracts-tokens';
 import { SignedOrder } from '@0x/types';
@@ -59,7 +60,11 @@ export class ForwarderWrapper {
     constructor(contractInstance: ForwarderContract, provider: Provider) {
         this._forwarderContract = contractInstance;
         this._web3Wrapper = new Web3Wrapper(provider);
-        this._logDecoder = new LogDecoder(this._web3Wrapper, { ...artifacts, ...tokensArtifacts });
+        this._logDecoder = new LogDecoder(this._web3Wrapper, {
+            ...artifacts,
+            ...tokensArtifacts,
+            ...protocolArtifacts,
+        });
     }
     public async marketSellOrdersWithEthAsync(
         orders: SignedOrder[],
diff --git a/contracts/extensions/tsconfig.json b/contracts/extensions/tsconfig.json
new file mode 100644
index 000000000..a4ce1e002
--- /dev/null
+++ b/contracts/extensions/tsconfig.json
@@ -0,0 +1,11 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": ".",
+        "resolveJsonModule": true
+    },
+    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
+    "files": ["./generated-artifacts/DutchAuction.json", "./generated-artifacts/Forwarder.json"],
+    "exclude": ["./deploy/solc/solc_bin"]
+}
diff --git a/contracts/extensions/tslint.json b/contracts/extensions/tslint.json
new file mode 100644
index 000000000..1bb3ac2a2
--- /dev/null
+++ b/contracts/extensions/tslint.json
@@ -0,0 +1,6 @@
+{
+    "extends": ["@0x/tslint-config"],
+    "rules": {
+        "custom-no-magic-numbers": false
+    }
+}
diff --git a/contracts/interfaces/.solhint.json b/contracts/interfaces/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/interfaces/.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/interfaces/package.json b/contracts/interfaces/package.json
index b79ae20ff..04d307f5d 100644
--- a/contracts/interfaces/package.json
+++ b/contracts/interfaces/package.json
@@ -15,7 +15,7 @@
         "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",
-        "lint-contracts": "solhint contracts/**/**/**/**/*.sol"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(IAssetData|IAssetProxy|IAuthorizable|IAssetProxyDispatcher|IExchange|IExchangeCore|IMatchOrders|ISignatureValidator|ITransactions|IValidator|IWallet|IWrapperFunctions).json"
@@ -35,7 +35,7 @@
         "@0x/tslint-config": "^1.0.10",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
diff --git a/contracts/libs/.solhint.json b/contracts/libs/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/libs/.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/libs/package.json b/contracts/libs/package.json
index 74288be76..6ea91cad4 100644
--- a/contracts/libs/package.json
+++ b/contracts/libs/package.json
@@ -30,7 +30,7 @@
         "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"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(LibMath|LibOrder|LibFillResults|LibAbiEncoder|TestLibs|LibEIP712).json"
@@ -66,7 +66,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
diff --git a/contracts/multisig/.solhint.json b/contracts/multisig/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/multisig/.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/multisig/package.json b/contracts/multisig/package.json
index 37d064fef..936473142 100644
--- a/contracts/multisig/package.json
+++ b/contracts/multisig/package.json
@@ -29,7 +29,7 @@
         "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"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(MultiSigWallet|MultiSigWalletWithTimeLock|TestRejectEther).json"
@@ -42,7 +42,7 @@
     "bugs": {
         "url": "https://github.com/0xProject/0x-monorepo/issues"
     },
-    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/core/README.md",
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/multisig/README.md",
     "devDependencies": {
         "@0x/contracts-test-utils": "^1.0.0",
         "@0x/abi-gen": "^1.0.17",
@@ -65,7 +65,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
diff --git a/contracts/core/CHANGELOG.json b/contracts/protocol/CHANGELOG.json
index 371f18cd4..371f18cd4 100644
--- a/contracts/core/CHANGELOG.json
+++ b/contracts/protocol/CHANGELOG.json
diff --git a/contracts/core/README.md b/contracts/protocol/README.md
index 8371d8041..5fc9c0a89 100644
--- a/contracts/core/README.md
+++ b/contracts/protocol/README.md
@@ -8,10 +8,6 @@ Contracts that make up and interact with version 2.0.0 of the protocol can be fo
 
 *   [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).
-*   [extensions](./contracts/extensions)
-    *   This directory contains contracts that interact with the 2.0.0 contracts and will be used in production, such as the [Forwarder](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract.
-*   [examples](./contracts/examples)
-    *   This directory contains example implementations of contracts that interact with the protocol but are _not_ intended for use in production. Examples include [filter](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#filter-contracts) contracts, a [Wallet](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#wallet) contract, and a [Validator](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#validator) contract, among others.
 *   [test](./contracts/test)
     *   This directory contains mocks and other contracts that are used solely for testing contracts within the other directories.
 
@@ -46,13 +42,13 @@ yarn install
 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
+PKG=@0x/contracts-protocol yarn build
 ```
 
 Or continuously rebuild on change:
 
 ```bash
-PKG=@0x/contracts-core yarn watch
+PKG=@0x/contracts-protocol yarn watch
 ```
 
 ### Clean
diff --git a/contracts/core/compiler.json b/contracts/protocol/compiler.json
index 606208e49..c05d62aba 100644
--- a/contracts/core/compiler.json
+++ b/contracts/protocol/compiler.json
@@ -20,12 +20,9 @@
     },
     "contracts": [
         "AssetProxyOwner",
-        "DutchAuction",
         "ERC20Proxy",
         "ERC721Proxy",
         "Exchange",
-        "ExchangeWrapper",
-        "Forwarder",
         "MixinAuthorizable",
         "MultiAssetProxy",
         "OrderValidator",
@@ -33,9 +30,6 @@
         "TestAssetProxyDispatcher",
         "TestExchangeInternals",
         "TestSignatureValidator",
-        "TestStaticCallReceiver",
-        "Validator",
-        "Wallet",
-        "Whitelist"
+        "TestStaticCallReceiver"
     ]
 }
diff --git a/contracts/core/contracts/protocol/AssetProxy/ERC20Proxy.sol b/contracts/protocol/contracts/protocol/AssetProxy/ERC20Proxy.sol
index 258443bca..258443bca 100644
--- a/contracts/core/contracts/protocol/AssetProxy/ERC20Proxy.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxy/ERC20Proxy.sol
diff --git a/contracts/core/contracts/protocol/AssetProxy/ERC721Proxy.sol b/contracts/protocol/contracts/protocol/AssetProxy/ERC721Proxy.sol
index 65b664b8b..65b664b8b 100644
--- a/contracts/core/contracts/protocol/AssetProxy/ERC721Proxy.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxy/ERC721Proxy.sol
diff --git a/contracts/core/contracts/protocol/AssetProxy/MixinAuthorizable.sol b/contracts/protocol/contracts/protocol/AssetProxy/MixinAuthorizable.sol
index 08f9b94dc..08f9b94dc 100644
--- a/contracts/core/contracts/protocol/AssetProxy/MixinAuthorizable.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxy/MixinAuthorizable.sol
diff --git a/contracts/core/contracts/protocol/AssetProxy/MultiAssetProxy.sol b/contracts/protocol/contracts/protocol/AssetProxy/MultiAssetProxy.sol
index 42231e73b..42231e73b 100644
--- a/contracts/core/contracts/protocol/AssetProxy/MultiAssetProxy.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxy/MultiAssetProxy.sol
diff --git a/contracts/core/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol b/contracts/protocol/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol
index fe77048ce..fe77048ce 100644
--- a/contracts/core/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxy/mixins/MAuthorizable.sol
diff --git a/contracts/core/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol b/contracts/protocol/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol
index bfc7b5a66..bfc7b5a66 100644
--- a/contracts/core/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol
+++ b/contracts/protocol/contracts/protocol/AssetProxyOwner/AssetProxyOwner.sol
diff --git a/contracts/core/contracts/protocol/Exchange/Exchange.sol b/contracts/protocol/contracts/protocol/Exchange/Exchange.sol
index 65ca742ea..65ca742ea 100644
--- a/contracts/core/contracts/protocol/Exchange/Exchange.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/Exchange.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol b/contracts/protocol/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol
index 36ab39b45..36ab39b45 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinAssetProxyDispatcher.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinExchangeCore.sol b/contracts/protocol/contracts/protocol/Exchange/MixinExchangeCore.sol
index 68d6a3897..68d6a3897 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinExchangeCore.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinExchangeCore.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinMatchOrders.sol b/contracts/protocol/contracts/protocol/Exchange/MixinMatchOrders.sol
index fc6d73482..fc6d73482 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinMatchOrders.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinMatchOrders.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinSignatureValidator.sol b/contracts/protocol/contracts/protocol/Exchange/MixinSignatureValidator.sol
index 80b4c0755..80b4c0755 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinSignatureValidator.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinSignatureValidator.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinTransactions.sol b/contracts/protocol/contracts/protocol/Exchange/MixinTransactions.sol
index 87c614382..87c614382 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinTransactions.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinTransactions.sol
diff --git a/contracts/core/contracts/protocol/Exchange/MixinWrapperFunctions.sol b/contracts/protocol/contracts/protocol/Exchange/MixinWrapperFunctions.sol
index 2d43432ff..2d43432ff 100644
--- a/contracts/core/contracts/protocol/Exchange/MixinWrapperFunctions.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/MixinWrapperFunctions.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
index fe3d03326..fe3d03326 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MAssetProxyDispatcher.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MExchangeCore.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MExchangeCore.sol
index 215284900..215284900 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MExchangeCore.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MExchangeCore.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MMatchOrders.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MMatchOrders.sol
index 1eb4be329..1eb4be329 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MMatchOrders.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MMatchOrders.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MSignatureValidator.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MSignatureValidator.sol
index a933976d1..a933976d1 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MSignatureValidator.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MSignatureValidator.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MTransactions.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MTransactions.sol
index a6b0fdc85..a6b0fdc85 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MTransactions.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MTransactions.sol
diff --git a/contracts/core/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol b/contracts/protocol/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol
index 101e7cb82..101e7cb82 100644
--- a/contracts/core/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol
+++ b/contracts/protocol/contracts/protocol/Exchange/mixins/MWrapperFunctions.sol
diff --git a/contracts/core/contracts/extensions/OrderValidator/OrderValidator.sol b/contracts/protocol/contracts/protocol/OrderValidator/OrderValidator.sol
index 33dd1326c..33dd1326c 100644
--- a/contracts/core/contracts/extensions/OrderValidator/OrderValidator.sol
+++ b/contracts/protocol/contracts/protocol/OrderValidator/OrderValidator.sol
diff --git a/contracts/core/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol b/contracts/protocol/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
index ad71fc9a1..ad71fc9a1 100644
--- a/contracts/core/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
+++ b/contracts/protocol/contracts/test/TestAssetProxyDispatcher/TestAssetProxyDispatcher.sol
diff --git a/contracts/core/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol b/contracts/protocol/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
index 52c66cb56..52c66cb56 100644
--- a/contracts/core/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
+++ b/contracts/protocol/contracts/test/TestAssetProxyOwner/TestAssetProxyOwner.sol
diff --git a/contracts/core/contracts/test/TestExchangeInternals/TestExchangeInternals.sol b/contracts/protocol/contracts/test/TestExchangeInternals/TestExchangeInternals.sol
index 27187f8f8..27187f8f8 100644
--- a/contracts/core/contracts/test/TestExchangeInternals/TestExchangeInternals.sol
+++ b/contracts/protocol/contracts/test/TestExchangeInternals/TestExchangeInternals.sol
diff --git a/contracts/core/contracts/test/TestSignatureValidator/TestSignatureValidator.sol b/contracts/protocol/contracts/test/TestSignatureValidator/TestSignatureValidator.sol
index ea3e2de59..ea3e2de59 100644
--- a/contracts/core/contracts/test/TestSignatureValidator/TestSignatureValidator.sol
+++ b/contracts/protocol/contracts/test/TestSignatureValidator/TestSignatureValidator.sol
diff --git a/contracts/core/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol b/contracts/protocol/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol
index d08da7303..d08da7303 100644
--- a/contracts/core/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol
+++ b/contracts/protocol/contracts/test/TestStaticCallReceiver/TestStaticCallReceiver.sol
diff --git a/contracts/core/package.json b/contracts/protocol/package.json
index fd844ae16..1dba64681 100644
--- a/contracts/core/package.json
+++ b/contracts/protocol/package.json
@@ -1,6 +1,6 @@
 {
     "private": true,
-    "name": "@0x/contracts-core",
+    "name": "@0x/contracts-protocol",
     "version": "2.1.56",
     "engines": {
         "node": ">=6.12"
@@ -30,10 +30,10 @@
         "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"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "generated-artifacts/@(AssetProxyOwner|DutchAuction|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|MixinAuthorizable|MultiAssetProxy|OrderValidator|TestAssetProxyOwner|TestAssetProxyDispatcher|TestExchangeInternals|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|Whitelist).json"
+        "abis": "generated-artifacts/@(AssetProxyOwner|ERC20Proxy|ERC721Proxy|Exchange|MixinAuthorizable|MultiAssetProxy|OrderValidator|TestSignatureValidator|TestAssetProxyOwner|TestAssetProxyDispatcher|TestExchangeInternals|TestStaticCallReceiver).json"
     },
     "repository": {
         "type": "git",
@@ -43,7 +43,7 @@
     "bugs": {
         "url": "https://github.com/0xProject/0x-monorepo/issues"
     },
-    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/core/README.md",
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
     "devDependencies": {
         "@0x/contracts-test-utils": "^1.0.0",
         "@0x/abi-gen": "^1.0.17",
@@ -66,7 +66,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
@@ -77,6 +77,7 @@
         "@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",
diff --git a/contracts/core/src/artifacts/index.ts b/contracts/protocol/src/artifacts/index.ts
index ac334c173..1d53ceb04 100644
--- a/contracts/core/src/artifacts/index.ts
+++ b/contracts/protocol/src/artifacts/index.ts
@@ -1,12 +1,9 @@
 import { ContractArtifact } from 'ethereum-types';
 
 import * as AssetProxyOwner from '../../generated-artifacts/AssetProxyOwner.json';
-import * as DutchAuction from '../../generated-artifacts/DutchAuction.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 ExchangeWrapper from '../../generated-artifacts/ExchangeWrapper.json';
-import * as Forwarder from '../../generated-artifacts/Forwarder.json';
 import * as MixinAuthorizable from '../../generated-artifacts/MixinAuthorizable.json';
 import * as MultiAssetProxy from '../../generated-artifacts/MultiAssetProxy.json';
 import * as OrderValidator from '../../generated-artifacts/OrderValidator.json';
@@ -15,18 +12,12 @@ import * as TestAssetProxyOwner from '../../generated-artifacts/TestAssetProxyOw
 import * as TestExchangeInternals from '../../generated-artifacts/TestExchangeInternals.json';
 import * as TestSignatureValidator from '../../generated-artifacts/TestSignatureValidator.json';
 import * as TestStaticCallReceiver from '../../generated-artifacts/TestStaticCallReceiver.json';
-import * as Validator from '../../generated-artifacts/Validator.json';
-import * as Wallet from '../../generated-artifacts/Wallet.json';
-import * as Whitelist from '../../generated-artifacts/Whitelist.json';
 
 export const artifacts = {
     AssetProxyOwner: AssetProxyOwner as ContractArtifact,
-    DutchAuction: DutchAuction as ContractArtifact,
     ERC20Proxy: ERC20Proxy as ContractArtifact,
     ERC721Proxy: ERC721Proxy as ContractArtifact,
     Exchange: Exchange as ContractArtifact,
-    ExchangeWrapper: ExchangeWrapper as ContractArtifact,
-    Forwarder: Forwarder as ContractArtifact,
     MixinAuthorizable: MixinAuthorizable as ContractArtifact,
     MultiAssetProxy: MultiAssetProxy as ContractArtifact,
     OrderValidator: OrderValidator as ContractArtifact,
@@ -35,7 +26,4 @@ export const artifacts = {
     TestExchangeInternals: TestExchangeInternals as ContractArtifact,
     TestSignatureValidator: TestSignatureValidator as ContractArtifact,
     TestStaticCallReceiver: TestStaticCallReceiver as ContractArtifact,
-    Validator: Validator as ContractArtifact,
-    Wallet: Wallet as ContractArtifact,
-    Whitelist: Whitelist as ContractArtifact,
 };
diff --git a/contracts/protocol/src/index.ts b/contracts/protocol/src/index.ts
new file mode 100644
index 000000000..ba813e7ca
--- /dev/null
+++ b/contracts/protocol/src/index.ts
@@ -0,0 +1,3 @@
+export * from './artifacts';
+export * from './wrappers';
+export * from '../test/utils';
diff --git a/contracts/core/src/wrappers/index.ts b/contracts/protocol/src/wrappers/index.ts
index ff26a171e..ac951d269 100644
--- a/contracts/core/src/wrappers/index.ts
+++ b/contracts/protocol/src/wrappers/index.ts
@@ -1,10 +1,7 @@
 export * from '../../generated-wrappers/asset_proxy_owner';
-export * from '../../generated-wrappers/dutch_auction';
 export * from '../../generated-wrappers/erc20_proxy';
 export * from '../../generated-wrappers/erc721_proxy';
 export * from '../../generated-wrappers/exchange';
-export * from '../../generated-wrappers/exchange_wrapper';
-export * from '../../generated-wrappers/forwarder';
 export * from '../../generated-wrappers/mixin_authorizable';
 export * from '../../generated-wrappers/order_validator';
 export * from '../../generated-wrappers/test_asset_proxy_dispatcher';
@@ -12,6 +9,3 @@ 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';
-export * from '../../generated-wrappers/validator';
-export * from '../../generated-wrappers/wallet';
-export * from '../../generated-wrappers/whitelist';
diff --git a/contracts/core/test/asset_proxy/authorizable.ts b/contracts/protocol/test/asset_proxy/authorizable.ts
index 853d18be0..853d18be0 100644
--- a/contracts/core/test/asset_proxy/authorizable.ts
+++ b/contracts/protocol/test/asset_proxy/authorizable.ts
diff --git a/contracts/core/test/asset_proxy/proxies.ts b/contracts/protocol/test/asset_proxy/proxies.ts
index c4bd95905..c4bd95905 100644
--- a/contracts/core/test/asset_proxy/proxies.ts
+++ b/contracts/protocol/test/asset_proxy/proxies.ts
diff --git a/contracts/core/test/exchange/core.ts b/contracts/protocol/test/exchange/core.ts
index 9b948f991..9b948f991 100644
--- a/contracts/core/test/exchange/core.ts
+++ b/contracts/protocol/test/exchange/core.ts
diff --git a/contracts/core/test/exchange/dispatcher.ts b/contracts/protocol/test/exchange/dispatcher.ts
index 5b1ac1e20..5b1ac1e20 100644
--- a/contracts/core/test/exchange/dispatcher.ts
+++ b/contracts/protocol/test/exchange/dispatcher.ts
diff --git a/contracts/core/test/exchange/fill_order.ts b/contracts/protocol/test/exchange/fill_order.ts
index 2bdbe4855..2bdbe4855 100644
--- a/contracts/core/test/exchange/fill_order.ts
+++ b/contracts/protocol/test/exchange/fill_order.ts
diff --git a/contracts/core/test/exchange/internal.ts b/contracts/protocol/test/exchange/internal.ts
index 972f5efb6..972f5efb6 100644
--- a/contracts/core/test/exchange/internal.ts
+++ b/contracts/protocol/test/exchange/internal.ts
diff --git a/contracts/core/test/exchange/match_orders.ts b/contracts/protocol/test/exchange/match_orders.ts
index 8e943c237..8e943c237 100644
--- a/contracts/core/test/exchange/match_orders.ts
+++ b/contracts/protocol/test/exchange/match_orders.ts
diff --git a/contracts/core/test/extensions/order_validator.ts b/contracts/protocol/test/exchange/order_validator.ts
index 622710c98..8f53426db 100644
--- a/contracts/core/test/extensions/order_validator.ts
+++ b/contracts/protocol/test/exchange/order_validator.ts
@@ -15,14 +15,16 @@ 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 { ExchangeContract } from '../../generated-wrappers/exchange';
-import { OrderValidatorContract } from '../../generated-wrappers/order_validator';
-import { artifacts } from '../../src/artifacts';
-import { ERC20Wrapper } from '../utils/erc20_wrapper';
-import { ERC721Wrapper } from '../utils/erc721_wrapper';
-import { ExchangeWrapper } from '../utils/exchange_wrapper';
+import {
+    artifacts,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+    ExchangeContract,
+    ExchangeWrapper,
+    OrderValidatorContract,
+} from '../../src';
 
 chaiSetup.configure();
 const expect = chai.expect;
diff --git a/contracts/core/test/exchange/signature_validator.ts b/contracts/protocol/test/exchange/signature_validator.ts
index a968570b6..3f1786b5b 100644
--- a/contracts/core/test/exchange/signature_validator.ts
+++ b/contracts/protocol/test/exchange/signature_validator.ts
@@ -1,3 +1,4 @@
+import { artifacts as examplesArtifacts, ValidatorContract, WalletContract } from '@0x/contracts-examples';
 import {
     addressUtils,
     chaiSetup,
@@ -22,8 +23,6 @@ import {
     TestSignatureValidatorContract,
     TestSignatureValidatorSignatureValidatorApprovalEventArgs,
     TestStaticCallReceiverContract,
-    ValidatorContract,
-    WalletContract,
 } from '../../src';
 
 chaiSetup.configure();
@@ -62,13 +61,13 @@ describe('MixinSignatureValidator', () => {
             txDefaults,
         );
         testWallet = await WalletContract.deployFrom0xArtifactAsync(
-            artifacts.Wallet,
+            examplesArtifacts.Wallet,
             provider,
             txDefaults,
             signerAddress,
         );
         testValidator = await ValidatorContract.deployFrom0xArtifactAsync(
-            artifacts.Validator,
+            examplesArtifacts.Validator,
             provider,
             txDefaults,
             signerAddress,
diff --git a/contracts/core/test/exchange/transactions.ts b/contracts/protocol/test/exchange/transactions.ts
index ad0ca41c2..746f3cb04 100644
--- a/contracts/core/test/exchange/transactions.ts
+++ b/contracts/protocol/test/exchange/transactions.ts
@@ -1,3 +1,4 @@
+import { artifacts as examplesArtifacts, ExchangeWrapperContract, WhitelistContract } from '@0x/contracts-examples';
 import {
     chaiSetup,
     constants,
@@ -21,8 +22,6 @@ import * as _ from 'lodash';
 
 import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
 import { ExchangeContract } from '../../generated-wrappers/exchange';
-import { ExchangeWrapperContract } from '../../generated-wrappers/exchange_wrapper';
-import { WhitelistContract } from '../../generated-wrappers/whitelist';
 import { artifacts } from '../../src/artifacts';
 import { ERC20Wrapper } from '../utils/erc20_wrapper';
 import { ExchangeWrapper } from '../utils/exchange_wrapper';
@@ -222,7 +221,7 @@ describe('Exchange transactions', () => {
 
             before(async () => {
                 exchangeWrapperContract = await ExchangeWrapperContract.deployFrom0xArtifactAsync(
-                    artifacts.ExchangeWrapper,
+                    examplesArtifacts.ExchangeWrapper,
                     provider,
                     txDefaults,
                     exchange.address,
@@ -336,7 +335,7 @@ describe('Exchange transactions', () => {
 
         before(async () => {
             whitelist = await WhitelistContract.deployFrom0xArtifactAsync(
-                artifacts.Whitelist,
+                examplesArtifacts.Whitelist,
                 provider,
                 txDefaults,
                 exchange.address,
diff --git a/contracts/core/test/exchange/wrapper.ts b/contracts/protocol/test/exchange/wrapper.ts
index c9efb0c9d..c9efb0c9d 100644
--- a/contracts/core/test/exchange/wrapper.ts
+++ b/contracts/protocol/test/exchange/wrapper.ts
diff --git a/contracts/protocol/test/global_hooks.ts b/contracts/protocol/test/global_hooks.ts
new file mode 100644
index 000000000..f8ace376a
--- /dev/null
+++ b/contracts/protocol/test/global_hooks.ts
@@ -0,0 +1,17 @@
+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/protocol/test/multisig/asset_proxy_owner.ts
index daebfb7fb..daebfb7fb 100644
--- a/contracts/core/test/multisig/asset_proxy_owner.ts
+++ b/contracts/protocol/test/multisig/asset_proxy_owner.ts
diff --git a/contracts/core/test/utils/asset_proxy_owner_wrapper.ts b/contracts/protocol/test/utils/asset_proxy_owner_wrapper.ts
index df23658d8..df23658d8 100644
--- a/contracts/core/test/utils/asset_proxy_owner_wrapper.ts
+++ b/contracts/protocol/test/utils/asset_proxy_owner_wrapper.ts
diff --git a/contracts/core/test/utils/asset_wrapper.ts b/contracts/protocol/test/utils/asset_wrapper.ts
index e4090ad74..e4090ad74 100644
--- a/contracts/core/test/utils/asset_wrapper.ts
+++ b/contracts/protocol/test/utils/asset_wrapper.ts
diff --git a/contracts/core/test/utils/erc20_wrapper.ts b/contracts/protocol/test/utils/erc20_wrapper.ts
index e5ab0e36c..e5ab0e36c 100644
--- a/contracts/core/test/utils/erc20_wrapper.ts
+++ b/contracts/protocol/test/utils/erc20_wrapper.ts
diff --git a/contracts/core/test/utils/erc721_wrapper.ts b/contracts/protocol/test/utils/erc721_wrapper.ts
index 1f658ce86..1f658ce86 100644
--- a/contracts/core/test/utils/erc721_wrapper.ts
+++ b/contracts/protocol/test/utils/erc721_wrapper.ts
diff --git a/contracts/core/test/utils/exchange_wrapper.ts b/contracts/protocol/test/utils/exchange_wrapper.ts
index cb6dce901..cb6dce901 100644
--- a/contracts/core/test/utils/exchange_wrapper.ts
+++ b/contracts/protocol/test/utils/exchange_wrapper.ts
diff --git a/contracts/core/test/utils/fill_order_combinatorial_utils.ts b/contracts/protocol/test/utils/fill_order_combinatorial_utils.ts
index 5d0ea07a8..5d0ea07a8 100644
--- a/contracts/core/test/utils/fill_order_combinatorial_utils.ts
+++ b/contracts/protocol/test/utils/fill_order_combinatorial_utils.ts
diff --git a/contracts/protocol/test/utils/index.ts b/contracts/protocol/test/utils/index.ts
new file mode 100644
index 000000000..75cd88666
--- /dev/null
+++ b/contracts/protocol/test/utils/index.ts
@@ -0,0 +1,3 @@
+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/protocol/test/utils/match_order_tester.ts
index 8f574704e..8f574704e 100644
--- a/contracts/core/test/utils/match_order_tester.ts
+++ b/contracts/protocol/test/utils/match_order_tester.ts
diff --git a/contracts/core/test/utils/order_factory_from_scenario.ts b/contracts/protocol/test/utils/order_factory_from_scenario.ts
index ecb4b2e28..ecb4b2e28 100644
--- a/contracts/core/test/utils/order_factory_from_scenario.ts
+++ b/contracts/protocol/test/utils/order_factory_from_scenario.ts
diff --git a/contracts/core/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts b/contracts/protocol/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts
index 64b7dedbe..64b7dedbe 100644
--- a/contracts/core/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts
+++ b/contracts/protocol/test/utils/simple_asset_balance_and_proxy_allowance_fetcher.ts
diff --git a/contracts/core/test/utils/simple_order_filled_cancelled_fetcher.ts b/contracts/protocol/test/utils/simple_order_filled_cancelled_fetcher.ts
index af959e00e..af959e00e 100644
--- a/contracts/core/test/utils/simple_order_filled_cancelled_fetcher.ts
+++ b/contracts/protocol/test/utils/simple_order_filled_cancelled_fetcher.ts
diff --git a/contracts/core/tsconfig.json b/contracts/protocol/tsconfig.json
index ea493cbb8..989d3ef2b 100644
--- a/contracts/core/tsconfig.json
+++ b/contracts/protocol/tsconfig.json
@@ -8,12 +8,9 @@
     "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
     "files": [
         "./generated-artifacts/AssetProxyOwner.json",
-        "./generated-artifacts/DutchAuction.json",
         "./generated-artifacts/ERC20Proxy.json",
         "./generated-artifacts/ERC721Proxy.json",
         "./generated-artifacts/Exchange.json",
-        "./generated-artifacts/ExchangeWrapper.json",
-        "./generated-artifacts/Forwarder.json",
         "./generated-artifacts/MixinAuthorizable.json",
         "./generated-artifacts/MultiAssetProxy.json",
         "./generated-artifacts/OrderValidator.json",
@@ -21,10 +18,7 @@
         "./generated-artifacts/TestAssetProxyOwner.json",
         "./generated-artifacts/TestExchangeInternals.json",
         "./generated-artifacts/TestSignatureValidator.json",
-        "./generated-artifacts/TestStaticCallReceiver.json",
-        "./generated-artifacts/Validator.json",
-        "./generated-artifacts/Wallet.json",
-        "./generated-artifacts/Whitelist.json"
+        "./generated-artifacts/TestStaticCallReceiver.json"
     ],
     "exclude": ["./deploy/solc/solc_bin"]
 }
diff --git a/contracts/protocol/tslint.json b/contracts/protocol/tslint.json
new file mode 100644
index 000000000..1bb3ac2a2
--- /dev/null
+++ b/contracts/protocol/tslint.json
@@ -0,0 +1,6 @@
+{
+    "extends": ["@0x/tslint-config"],
+    "rules": {
+        "custom-no-magic-numbers": false
+    }
+}
diff --git a/contracts/tokens/.solhint.json b/contracts/tokens/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/tokens/.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/tokens/package.json b/contracts/tokens/package.json
index 0666ea89a..05fe3272b 100644
--- a/contracts/tokens/package.json
+++ b/contracts/tokens/package.json
@@ -30,7 +30,7 @@
         "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"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(DummyERC20Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|DummyERC721Receiver|InvalidERC721Receiver|DummyERC721Token|ReentrantERC20Token|ERC20Token|IERC20Token|MintableERC20Token|UnlimitedAllowanceERC20Token|ERC721Token|IERC721Receiver|IERC721Token|MintableERC721Token|IEtherToken|WETH9|ERC20Token_v1|Token_v1|UnlimitedAllowanceToken_v1|ZRXToken).json"
@@ -66,7 +66,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
diff --git a/contracts/utils/.solhint.json b/contracts/utils/.solhint.json
deleted file mode 100644
index 076afe9f3..000000000
--- a/contracts/utils/.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/utils/package.json b/contracts/utils/package.json
index c0bc8bfcf..1581e3284 100644
--- a/contracts/utils/package.json
+++ b/contracts/utils/package.json
@@ -30,7 +30,7 @@
         "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"
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
         "abis": "generated-artifacts/@(IOwnable|Ownable|LibBytes|ReentrancyGuard|SafeMath|TestConstants|TestLibBytes).json"
@@ -67,7 +67,7 @@
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
         "solc": "^0.4.24",
-        "solhint": "^1.2.1",
+        "solhint": "^1.4.1",
         "tslint": "5.11.0",
         "typescript": "3.0.1",
         "yargs": "^10.0.3"
diff --git a/yarn.lock b/yarn.lock
index 23ba90bc8..1ba87f69d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -14450,9 +14450,9 @@ solc@^0.4.24:
     semver "^5.3.0"
     yargs "^4.7.1"
 
-solhint@^1.2.1:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/solhint/-/solhint-1.4.0.tgz#59018cfc86e2fc268c8b520322ab1e0db1fdb94b"
+solhint@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/solhint/-/solhint-1.4.1.tgz#921ef9fed83dc945853079865140730d4d2140b2"
   dependencies:
     antlr4 "4.7.1"
     commander "2.18.0"