Switch over to Lerna + Yarn Workspaces setup for a mono-repo approach

37 files changed, 0 insertions, 7318 deletions

diff --git a/src/0x.ts b/src/0x.ts
deleted file mode 100644
index fe765bbbe..000000000
--- a/src/0x.ts
+++ /dev/null
@@ -1,333 +0,0 @@
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {SchemaValidator, schemas} from '0x-json-schemas';
-import {bigNumberConfigs} from './bignumber_config';
-import * as ethUtil from 'ethereumjs-util';
-import {Web3Wrapper} from './web3_wrapper';
-import {constants} from './utils/constants';
-import {utils} from './utils/utils';
-import {signatureUtils} from './utils/signature_utils';
-import {assert} from './utils/assert';
-import {AbiDecoder} from './utils/abi_decoder';
-import {intervalUtils} from './utils/interval_utils';
-import {artifacts} from './artifacts';
-import {ExchangeWrapper} from './contract_wrappers/exchange_wrapper';
-import {TokenRegistryWrapper} from './contract_wrappers/token_registry_wrapper';
-import {EtherTokenWrapper} from './contract_wrappers/ether_token_wrapper';
-import {TokenWrapper} from './contract_wrappers/token_wrapper';
-import {TokenTransferProxyWrapper} from './contract_wrappers/token_transfer_proxy_wrapper';
-import {OrderStateWatcher} from './order_watcher/order_state_watcher';
-import {OrderStateUtils} from './utils/order_state_utils';
-import {
-    ECSignature,
-    ZeroExError,
-    Order,
-    SignedOrder,
-    Web3Provider,
-    ZeroExConfig,
-    OrderStateWatcherConfig,
-    TransactionReceiptWithDecodedLogs,
-} from './types';
-import {zeroExConfigSchema} from './schemas/zero_ex_config_schema';
-
-// Customize our BigNumber instances
-bigNumberConfigs.configure();
-
-/**
- * The ZeroEx class is the single entry-point into the 0x.js library. It contains all of the library's functionality
- * and all calls to the library should be made through a ZeroEx instance.
- */
-export class ZeroEx {
-    /**
-     * When creating an order without a specified taker or feeRecipient you must supply the Solidity
-     * address null type (as opposed to Javascripts `null`, `undefined` or empty string). We expose
-     * this constant for your convenience.
-     */
-    public static NULL_ADDRESS = constants.NULL_ADDRESS;
-
-    /**
-     * An instance of the ExchangeWrapper class containing methods for interacting with the 0x Exchange smart contract.
-     */
-    public exchange: ExchangeWrapper;
-    /**
-     * An instance of the TokenRegistryWrapper class containing methods for interacting with the 0x
-     * TokenRegistry smart contract.
-     */
-    public tokenRegistry: TokenRegistryWrapper;
-    /**
-     * An instance of the TokenWrapper class containing methods for interacting with any ERC20 token smart contract.
-     */
-    public token: TokenWrapper;
-    /**
-     * An instance of the EtherTokenWrapper class containing methods for interacting with the
-     * wrapped ETH ERC20 token smart contract.
-     */
-    public etherToken: EtherTokenWrapper;
-    /**
-     * An instance of the TokenTransferProxyWrapper class containing methods for interacting with the
-     * tokenTransferProxy smart contract.
-     */
-    public proxy: TokenTransferProxyWrapper;
-    /**
-     * An instance of the OrderStateWatcher class containing methods for watching a set of orders for relevant
-     * blockchain state changes.
-     */
-    public orderStateWatcher: OrderStateWatcher;
-    private _web3Wrapper: Web3Wrapper;
-    private _abiDecoder: AbiDecoder;
-    /**
-     * Verifies that the elliptic curve signature `signature` was generated
-     * by signing `data` with the private key corresponding to the `signerAddress` address.
-     * @param   data          The hex encoded data signed by the supplied signature.
-     * @param   signature     An object containing the elliptic curve signature parameters.
-     * @param   signerAddress The hex encoded address that signed the data, producing the supplied signature.
-     * @return  Whether the signature is valid for the supplied signerAddress and data.
-     */
-    public static isValidSignature(data: string, signature: ECSignature, signerAddress: string): boolean {
-        assert.isHexString('data', data);
-        assert.doesConformToSchema('signature', signature, schemas.ecSignatureSchema);
-        assert.isETHAddressHex('signerAddress', signerAddress);
-
-        const isValidSignature = signatureUtils.isValidSignature(data, signature, signerAddress);
-        return isValidSignature;
-    }
-    /**
-     * Generates a pseudo-random 256-bit salt.
-     * The salt can be included in an 0x order, ensuring that the order generates a unique orderHash
-     * and will not collide with other outstanding orders that are identical in all other parameters.
-     * @return  A pseudo-random 256-bit number that can be used as a salt.
-     */
-    public static generatePseudoRandomSalt(): BigNumber {
-        // BigNumber.random returns a pseudo-random number between 0 & 1 with a passed in number of decimal places.
-        // Source: https://mikemcl.github.io/bignumber.js/#random
-        const randomNumber = BigNumber.random(constants.MAX_DIGITS_IN_UNSIGNED_256_INT);
-        const factor = new BigNumber(10).pow(constants.MAX_DIGITS_IN_UNSIGNED_256_INT - 1);
-        const salt = randomNumber.times(factor).round();
-        return salt;
-    }
-    /**
-     * Checks if the supplied hex encoded order hash is valid.
-     * Note: Valid means it has the expected format, not that an order with the orderHash exists.
-     * Use this method when processing orderHashes submitted as user input.
-     * @param   orderHash    Hex encoded orderHash.
-     * @return  Whether the supplied orderHash has the expected format.
-     */
-    public static isValidOrderHash(orderHash: string): boolean {
-        // Since this method can be called to check if any arbitrary string conforms to an orderHash's
-        // format, we only assert that we were indeed passed a string.
-        assert.isString('orderHash', orderHash);
-        const schemaValidator = new SchemaValidator();
-        const isValidOrderHash = schemaValidator.validate(orderHash, schemas.orderHashSchema).valid;
-        return isValidOrderHash;
-    }
-    /**
-     * A unit amount is defined as the amount of a token above the specified decimal places (integer part).
-     * E.g: If a currency has 18 decimal places, 1e18 or one quintillion of the currency is equivalent
-     * to 1 unit.
-     * @param   amount      The amount in baseUnits that you would like converted to units.
-     * @param   decimals    The number of decimal places the unit amount has.
-     * @return  The amount in units.
-     */
-    public static toUnitAmount(amount: BigNumber, decimals: number): BigNumber {
-        assert.isBigNumber('amount', amount);
-        assert.isNumber('decimals', decimals);
-
-        const aUnit = new BigNumber(10).pow(decimals);
-        const unit = amount.div(aUnit);
-        return unit;
-    }
-    /**
-     * A baseUnit is defined as the smallest denomination of a token. An amount expressed in baseUnits
-     * is the amount expressed in the smallest denomination.
-     * E.g: 1 unit of a token with 18 decimal places is expressed in baseUnits as 1000000000000000000
-     * @param   amount      The amount of units that you would like converted to baseUnits.
-     * @param   decimals    The number of decimal places the unit amount has.
-     * @return  The amount in baseUnits.
-     */
-    public static toBaseUnitAmount(amount: BigNumber, decimals: number): BigNumber {
-        assert.isBigNumber('amount', amount);
-        assert.isNumber('decimals', decimals);
-
-        const unit = new BigNumber(10).pow(decimals);
-        const baseUnitAmount = amount.times(unit);
-        return baseUnitAmount;
-    }
-    /**
-     * Computes the orderHash for a supplied order.
-     * @param   order   An object that conforms to the Order or SignedOrder interface definitions.
-     * @return  The resulting orderHash from hashing the supplied order.
-     */
-    public static getOrderHashHex(order: Order|SignedOrder): string {
-        assert.doesConformToSchema('order', order, schemas.orderSchema);
-        const orderHashHex = utils.getOrderHashHex(order);
-        return orderHashHex;
-    }
-    /**
-     * Instantiates a new ZeroEx instance that provides the public interface to the 0x.js library.
-     * @param   provider    The Web3.js Provider instance you would like the 0x.js library to use for interacting with
-     *                      the Ethereum network.
-     * @param   config      The configuration object. Look up the type for the description.
-     * @return  An instance of the 0x.js ZeroEx class.
-     */
-    constructor(provider: Web3Provider, config?: ZeroExConfig) {
-        assert.isWeb3Provider('provider', provider);
-        if (!_.isUndefined(config)) {
-            assert.doesConformToSchema('config', config, zeroExConfigSchema);
-        }
-        const artifactJSONs = _.values(artifacts);
-        const abiArrays = _.map(artifactJSONs, artifact => artifact.abi);
-        this._abiDecoder = new AbiDecoder(abiArrays);
-        const gasPrice = _.isUndefined(config) ? undefined : config.gasPrice;
-        const defaults = {
-            gasPrice,
-        };
-        this._web3Wrapper = new Web3Wrapper(provider, defaults);
-        this.token = new TokenWrapper(
-            this._web3Wrapper,
-            this._abiDecoder,
-            this._getTokenTransferProxyAddressAsync.bind(this),
-        );
-        const exchageContractAddressIfExists = _.isUndefined(config) ? undefined : config.exchangeContractAddress;
-        this.exchange = new ExchangeWrapper(
-            this._web3Wrapper,
-            this._abiDecoder,
-            this.token,
-            exchageContractAddressIfExists,
-        );
-        this.proxy = new TokenTransferProxyWrapper(
-            this._web3Wrapper,
-            this._getTokenTransferProxyAddressAsync.bind(this),
-        );
-        const tokenRegistryContractAddressIfExists = _.isUndefined(config) ?
-                                                     undefined :
-                                                     config.tokenRegistryContractAddress;
-        this.tokenRegistry = new TokenRegistryWrapper(this._web3Wrapper, tokenRegistryContractAddressIfExists);
-        const etherTokenContractAddressIfExists = _.isUndefined(config) ? undefined : config.etherTokenContractAddress;
-        this.etherToken = new EtherTokenWrapper(this._web3Wrapper, this.token, etherTokenContractAddressIfExists);
-        const orderWatcherConfig = _.isUndefined(config) ? undefined : config.orderWatcherConfig;
-        this.orderStateWatcher = new OrderStateWatcher(
-            this._web3Wrapper, this._abiDecoder, this.token, this.exchange, orderWatcherConfig,
-        );
-    }
-    /**
-     * Sets a new web3 provider for 0x.js. Updating the provider will stop all
-     * subscriptions so you will need to re-subscribe to all events relevant to your app after this call.
-     * @param   provider    The Web3Provider you would like the 0x.js library to use from now on.
-     */
-    public async setProviderAsync(provider: Web3Provider) {
-        this._web3Wrapper.setProvider(provider);
-        await (this.exchange as any)._invalidateContractInstancesAsync();
-        (this.tokenRegistry as any)._invalidateContractInstance();
-        await (this.token as any)._invalidateContractInstancesAsync();
-        (this.proxy as any)._invalidateContractInstance();
-        (this.etherToken as any)._invalidateContractInstance();
-    }
-    /**
-     * Get user Ethereum addresses available through the supplied web3 provider available for sending transactions.
-     * @return  An array of available user Ethereum addresses.
-     */
-    public async getAvailableAddressesAsync(): Promise<string[]> {
-        const availableAddresses = await this._web3Wrapper.getAvailableAddressesAsync();
-        return availableAddresses;
-    }
-    /**
-     * Signs an orderHash and returns it's elliptic curve signature.
-     * This method currently supports TestRPC, Geth and Parity above and below V1.6.6
-     * @param   orderHash       Hex encoded orderHash to sign.
-     * @param   signerAddress   The hex encoded Ethereum address you wish to sign it with. This address
-     *          must be available via the Web3.Provider supplied to 0x.js.
-     * @return  An object containing the Elliptic curve signature parameters generated by signing the orderHash.
-     */
-    public async signOrderHashAsync(orderHash: string, signerAddress: string): Promise<ECSignature> {
-        assert.isHexString('orderHash', orderHash);
-        await assert.isSenderAddressAsync('signerAddress', signerAddress, this._web3Wrapper);
-
-        let msgHashHex;
-        const nodeVersion = await this._web3Wrapper.getNodeVersionAsync();
-        const isParityNode = utils.isParityNode(nodeVersion);
-        const isTestRpc = utils.isTestRpc(nodeVersion);
-        if (isParityNode || isTestRpc) {
-            // Parity and TestRpc nodes add the personalMessage prefix itself
-            msgHashHex = orderHash;
-        } else {
-            const orderHashBuff = ethUtil.toBuffer(orderHash);
-            const msgHashBuff = ethUtil.hashPersonalMessage(orderHashBuff);
-            msgHashHex = ethUtil.bufferToHex(msgHashBuff);
-        }
-
-        const signature = await this._web3Wrapper.signTransactionAsync(signerAddress, msgHashHex);
-
-        // HACK: There is no consensus on whether the signatureHex string should be formatted as
-        // v + r + s OR r + s + v, and different clients (even different versions of the same client)
-        // return the signature params in different orders. In order to support all client implementations,
-        // we parse the signature in both ways, and evaluate if either one is a valid signature.
-        const validVParamValues = [27, 28];
-        const ecSignatureVRS = signatureUtils.parseSignatureHexAsVRS(signature);
-        if (_.includes(validVParamValues, ecSignatureVRS.v)) {
-            const isValidVRSSignature = ZeroEx.isValidSignature(orderHash, ecSignatureVRS, signerAddress);
-            if (isValidVRSSignature) {
-                return ecSignatureVRS;
-            }
-        }
-
-        const ecSignatureRSV = signatureUtils.parseSignatureHexAsRSV(signature);
-        if (_.includes(validVParamValues, ecSignatureRSV.v)) {
-            const isValidRSVSignature = ZeroEx.isValidSignature(orderHash, ecSignatureRSV, signerAddress);
-            if (isValidRSVSignature) {
-                return ecSignatureRSV;
-            }
-        }
-
-        throw new Error(ZeroExError.InvalidSignature);
-    }
-    /**
-     * Waits for a transaction to be mined and returns the transaction receipt.
-     * @param   txHash            Transaction hash
-     * @param   pollingIntervalMs How often (in ms) should we check if the transaction is mined.
-     * @param   timeoutMs         How long (in ms) to poll for transaction mined until aborting.
-     * @return  Transaction receipt with decoded log args.
-     */
-    public async awaitTransactionMinedAsync(
-        txHash: string, pollingIntervalMs = 1000, timeoutMs?: number): Promise<TransactionReceiptWithDecodedLogs> {
-        let timeoutExceeded = false;
-        if (timeoutMs) {
-            setTimeout(() => timeoutExceeded = true, timeoutMs);
-        }
-
-        const txReceiptPromise = new Promise(
-            (resolve: (receipt: TransactionReceiptWithDecodedLogs) => void, reject) => {
-            const intervalId = intervalUtils.setAsyncExcludingInterval(async () => {
-                if (timeoutExceeded) {
-                    intervalUtils.clearAsyncExcludingInterval(intervalId);
-                    return reject(ZeroExError.TransactionMiningTimeout);
-                }
-
-                const transactionReceipt = await this._web3Wrapper.getTransactionReceiptAsync(txHash);
-                if (!_.isNull(transactionReceipt)) {
-                    intervalUtils.clearAsyncExcludingInterval(intervalId);
-                    const logsWithDecodedArgs = _.map(
-                        transactionReceipt.logs,
-                        this._abiDecoder.tryToDecodeLogOrNoop.bind(this._abiDecoder),
-                    );
-                    const transactionReceiptWithDecodedLogArgs: TransactionReceiptWithDecodedLogs = {
-                        ...transactionReceipt,
-                        logs: logsWithDecodedArgs,
-                    };
-                    resolve(transactionReceiptWithDecodedLogArgs);
-                }
-            }, pollingIntervalMs);
-        });
-
-        return txReceiptPromise;
-    }
-    /*
-     * HACK: `TokenWrapper` needs a token transfer proxy address. `TokenTransferProxy` address is fetched from
-     * an `ExchangeWrapper`. `ExchangeWrapper` needs `TokenWrapper` to validate orders, creating a dependency cycle.
-     * In order to break this - we create this function here and pass it as a parameter to the `TokenWrapper`
-     * and `ProxyWrapper`.
-     */
-    private async _getTokenTransferProxyAddressAsync(): Promise<string> {
-        const tokenTransferProxyAddress = await (this.exchange as any)._getTokenTransferProxyAddressAsync();
-        return tokenTransferProxyAddress;
-    }
-}
diff --git a/src/artifacts.ts b/src/artifacts.ts
deleted file mode 100644
index 447f9880a..000000000
--- a/src/artifacts.ts
+++ /dev/null
@@ -1,14 +0,0 @@
-import {Artifact} from './types';
-import * as TokenArtifact from './artifacts/Token.json';
-import * as ExchangeArtifact from './artifacts/Exchange.json';
-import * as EtherTokenArtifact from './artifacts/EtherToken.json';
-import * as TokenRegistryArtifact from './artifacts/TokenRegistry.json';
-import * as TokenTransferProxyArtifact from './artifacts/TokenTransferProxy.json';
-
-export const artifacts = {
-    TokenArtifact: TokenArtifact as any as Artifact,
-    ExchangeArtifact: ExchangeArtifact as any as Artifact,
-    EtherTokenArtifact: EtherTokenArtifact as any as Artifact,
-    TokenRegistryArtifact: TokenRegistryArtifact as any as Artifact,
-    TokenTransferProxyArtifact: TokenTransferProxyArtifact as any as Artifact,
-};
diff --git a/src/artifacts/EtherToken.json b/src/artifacts/EtherToken.json
deleted file mode 100644
index 91b23bc94..000000000
--- a/src/artifacts/EtherToken.json
+++ /dev/null
@@ -1,445 +0,0 @@
-{
-  "contract_name": "EtherToken",
-  "abi": [
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "name",
-      "outputs": [
-        {
-          "name": "",
-          "type": "string"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_spender",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "approve",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "totalSupply",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_from",
-          "type": "address"
-        },
-        {
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "transferFrom",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "amount",
-          "type": "uint256"
-        }
-      ],
-      "name": "withdraw",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "decimals",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint8"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_owner",
-          "type": "address"
-        }
-      ],
-      "name": "balanceOf",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "symbol",
-      "outputs": [
-        {
-          "name": "",
-          "type": "string"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "transfer",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [],
-      "name": "deposit",
-      "outputs": [],
-      "payable": true,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_owner",
-          "type": "address"
-        },
-        {
-          "name": "_spender",
-          "type": "address"
-        }
-      ],
-      "name": "allowance",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "payable": true,
-      "type": "fallback"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "_from",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "Transfer",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "_owner",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "_spender",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "Approval",
-      "type": "event"
-    }
-  ],
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-  "networks": {
-    "1": {
-      "links": {},
-      "events": {
-        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_from",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_to",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Transfer",
-          "type": "event"
-        },
-        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_owner",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_spender",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Approval",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502488087000,
-      "address": "0x2956356cd2a2bf3202f771f50d3d14a367b48070"
-    },
-    "3": {
-      "links": {},
-      "events": {
-        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_from",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_to",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Transfer",
-          "type": "event"
-        },
-        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_owner",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_spender",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Approval",
-          "type": "event"
-        }
-      },
-      "updated_at": 1506602007000,
-      "address": "0xc00fd9820cd2898cc4c054b7bf142de637ad129a"
-    },
-    "42": {
-      "links": {},
-      "events": {
-        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_from",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_to",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Transfer",
-          "type": "event"
-        },
-        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_owner",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_spender",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Approval",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502391794392,
-      "address": "0x05d090b51c40b020eab3bfcb6a2dff130df22e9c"
-    },
-    "50": {
-      "links": {},
-      "events": {
-        "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_from",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_to",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Transfer",
-          "type": "event"
-        },
-        "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "_owner",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "_spender",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "_value",
-              "type": "uint256"
-            }
-          ],
-          "name": "Approval",
-          "type": "event"
-        }
-      },
-      "updated_at": 1503318938233,
-      "address": "0x48bacb9266a570d521063ef5dd96e61686dbe788"
-    }
-  },
-  "schema_version": "0.0.5",
-  "updated_at": 1503318938233
-}
diff --git a/src/artifacts/Exchange.json b/src/artifacts/Exchange.json
deleted file mode 100644
index 734c8f9c7..000000000
--- a/src/artifacts/Exchange.json
+++ /dev/null
@@ -1,1130 +0,0 @@
-{
-  "contract_name": "Exchange",
-  "abi": [
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "numerator",
-          "type": "uint256"
-        },
-        {
-          "name": "denominator",
-          "type": "uint256"
-        },
-        {
-          "name": "target",
-          "type": "uint256"
-        }
-      ],
-      "name": "isRoundingError",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "",
-          "type": "bytes32"
-        }
-      ],
-      "name": "filled",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "",
-          "type": "bytes32"
-        }
-      ],
-      "name": "cancelled",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5][]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6][]"
-        },
-        {
-          "name": "fillTakerTokenAmount",
-          "type": "uint256"
-        },
-        {
-          "name": "shouldThrowOnInsufficientBalanceOrAllowance",
-          "type": "bool"
-        },
-        {
-          "name": "v",
-          "type": "uint8[]"
-        },
-        {
-          "name": "r",
-          "type": "bytes32[]"
-        },
-        {
-          "name": "s",
-          "type": "bytes32[]"
-        }
-      ],
-      "name": "fillOrdersUpTo",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6]"
-        },
-        {
-          "name": "cancelTakerTokenAmount",
-          "type": "uint256"
-        }
-      ],
-      "name": "cancelOrder",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "ZRX_TOKEN_CONTRACT",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5][]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6][]"
-        },
-        {
-          "name": "fillTakerTokenAmounts",
-          "type": "uint256[]"
-        },
-        {
-          "name": "v",
-          "type": "uint8[]"
-        },
-        {
-          "name": "r",
-          "type": "bytes32[]"
-        },
-        {
-          "name": "s",
-          "type": "bytes32[]"
-        }
-      ],
-      "name": "batchFillOrKillOrders",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6]"
-        },
-        {
-          "name": "fillTakerTokenAmount",
-          "type": "uint256"
-        },
-        {
-          "name": "v",
-          "type": "uint8"
-        },
-        {
-          "name": "r",
-          "type": "bytes32"
-        },
-        {
-          "name": "s",
-          "type": "bytes32"
-        }
-      ],
-      "name": "fillOrKillOrder",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "orderHash",
-          "type": "bytes32"
-        }
-      ],
-      "name": "getUnavailableTakerTokenAmount",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "signer",
-          "type": "address"
-        },
-        {
-          "name": "hash",
-          "type": "bytes32"
-        },
-        {
-          "name": "v",
-          "type": "uint8"
-        },
-        {
-          "name": "r",
-          "type": "bytes32"
-        },
-        {
-          "name": "s",
-          "type": "bytes32"
-        }
-      ],
-      "name": "isValidSignature",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "numerator",
-          "type": "uint256"
-        },
-        {
-          "name": "denominator",
-          "type": "uint256"
-        },
-        {
-          "name": "target",
-          "type": "uint256"
-        }
-      ],
-      "name": "getPartialAmount",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "TOKEN_TRANSFER_PROXY_CONTRACT",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5][]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6][]"
-        },
-        {
-          "name": "fillTakerTokenAmounts",
-          "type": "uint256[]"
-        },
-        {
-          "name": "shouldThrowOnInsufficientBalanceOrAllowance",
-          "type": "bool"
-        },
-        {
-          "name": "v",
-          "type": "uint8[]"
-        },
-        {
-          "name": "r",
-          "type": "bytes32[]"
-        },
-        {
-          "name": "s",
-          "type": "bytes32[]"
-        }
-      ],
-      "name": "batchFillOrders",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5][]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6][]"
-        },
-        {
-          "name": "cancelTakerTokenAmounts",
-          "type": "uint256[]"
-        }
-      ],
-      "name": "batchCancelOrders",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6]"
-        },
-        {
-          "name": "fillTakerTokenAmount",
-          "type": "uint256"
-        },
-        {
-          "name": "shouldThrowOnInsufficientBalanceOrAllowance",
-          "type": "bool"
-        },
-        {
-          "name": "v",
-          "type": "uint8"
-        },
-        {
-          "name": "r",
-          "type": "bytes32"
-        },
-        {
-          "name": "s",
-          "type": "bytes32"
-        }
-      ],
-      "name": "fillOrder",
-      "outputs": [
-        {
-          "name": "filledTakerTokenAmount",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "orderAddresses",
-          "type": "address[5]"
-        },
-        {
-          "name": "orderValues",
-          "type": "uint256[6]"
-        }
-      ],
-      "name": "getOrderHash",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bytes32"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "EXTERNAL_QUERY_GAS_LIMIT",
-      "outputs": [
-        {
-          "name": "",
-          "type": "uint16"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "VERSION",
-      "outputs": [
-        {
-          "name": "",
-          "type": "string"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "inputs": [
-        {
-          "name": "_zrxToken",
-          "type": "address"
-        },
-        {
-          "name": "_tokenTransferProxy",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "constructor"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "maker",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "taker",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "feeRecipient",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "makerToken",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "takerToken",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "filledMakerTokenAmount",
-          "type": "uint256"
-        },
-        {
-          "indexed": false,
-          "name": "filledTakerTokenAmount",
-          "type": "uint256"
-        },
-        {
-          "indexed": false,
-          "name": "paidMakerFee",
-          "type": "uint256"
-        },
-        {
-          "indexed": false,
-          "name": "paidTakerFee",
-          "type": "uint256"
-        },
-        {
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-              "name": "filledMakerTokenAmount",
-              "type": "uint256"
-            },
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-              "name": "filledTakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidMakerFee",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidTakerFee",
-              "type": "uint256"
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-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
-            },
-            {
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-              "name": "orderHash",
-              "type": "bytes32"
-            }
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-          "name": "LogFill",
-          "type": "event"
-        },
-        "0x67d66f160bc93d925d05dae1794c90d2d6d6688b29b84ff069398a9b04587131": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "maker",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "feeRecipient",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "makerToken",
-              "type": "address"
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-            {
-              "indexed": false,
-              "name": "takerToken",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "cancelledMakerTokenAmount",
-              "type": "uint256"
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-            {
-              "indexed": false,
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-              "type": "uint256"
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-              "name": "tokens",
-              "type": "bytes32"
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-              "name": "orderHash",
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-        },
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-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "errorId",
-              "type": "uint8"
-            },
-            {
-              "indexed": true,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogError",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502480340000,
-      "address": "0x12459c951127e0c374ff9105dda097662a027093"
-    },
-    "3": {
-      "links": {},
-      "events": {
-        "0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "maker",
-              "type": "address"
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-              "indexed": false,
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-              "indexed": false,
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-            {
-              "indexed": false,
-              "name": "takerToken",
-              "type": "address"
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-              "indexed": false,
-              "name": "filledMakerTokenAmount",
-              "type": "uint256"
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-              "type": "uint256"
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-              "type": "bytes32"
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-          "type": "event"
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-        "0x67d66f160bc93d925d05dae1794c90d2d6d6688b29b84ff069398a9b04587131": {
-          "anonymous": false,
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-              "indexed": true,
-              "name": "maker",
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-              "name": "cancelledMakerTokenAmount",
-              "type": "uint256"
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-            {
-              "indexed": false,
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-              "type": "uint256"
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-            {
-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
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-            {
-              "indexed": false,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogCancel",
-          "type": "event"
-        },
-        "0x36d86c59e00bd73dc19ba3adfe068e4b64ac7e92be35546adeddf1b956a87e90": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "errorId",
-              "type": "uint8"
-            },
-            {
-              "indexed": true,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogError",
-          "type": "event"
-        }
-      },
-      "updated_at": 1506602007000,
-      "address": "0x479cc461fecd078f766ecc58533d6f69580cf3ac"
-    },
-    "42": {
-      "links": {},
-      "events": {
-        "0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "maker",
-              "type": "address"
-            },
-            {
-              "indexed": false,
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-              "type": "address"
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-              "name": "takerToken",
-              "type": "address"
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-            {
-              "indexed": false,
-              "name": "filledMakerTokenAmount",
-              "type": "uint256"
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-            {
-              "indexed": false,
-              "name": "filledTakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidMakerFee",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidTakerFee",
-              "type": "uint256"
-            },
-            {
-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
-            },
-            {
-              "indexed": false,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogFill",
-          "type": "event"
-        },
-        "0x67d66f160bc93d925d05dae1794c90d2d6d6688b29b84ff069398a9b04587131": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
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-              "type": "address"
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-            {
-              "indexed": false,
-              "name": "cancelledMakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
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-              "type": "uint256"
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-            {
-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
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-              "indexed": false,
-              "name": "orderHash",
-              "type": "bytes32"
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-          "name": "LogCancel",
-          "type": "event"
-        },
-        "0x36d86c59e00bd73dc19ba3adfe068e4b64ac7e92be35546adeddf1b956a87e90": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "errorId",
-              "type": "uint8"
-            },
-            {
-              "indexed": true,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogError",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502391794390,
-      "address": "0x90fe2af704b34e0224bf2299c838e04d4dcf1364"
-    },
-    "50": {
-      "links": {},
-      "events": {
-        "0x0d0b9391970d9a25552f37d436d2aae2925e2bfe1b2a923754bada030c498cb3": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "maker",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "taker",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "feeRecipient",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "makerToken",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "takerToken",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "filledMakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "filledTakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidMakerFee",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "paidTakerFee",
-              "type": "uint256"
-            },
-            {
-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
-            },
-            {
-              "indexed": false,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogFill",
-          "type": "event"
-        },
-        "0x67d66f160bc93d925d05dae1794c90d2d6d6688b29b84ff069398a9b04587131": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "maker",
-              "type": "address"
-            },
-            {
-              "indexed": true,
-              "name": "feeRecipient",
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-            },
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-              "indexed": false,
-              "name": "makerToken",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "takerToken",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "cancelledMakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": false,
-              "name": "cancelledTakerTokenAmount",
-              "type": "uint256"
-            },
-            {
-              "indexed": true,
-              "name": "tokens",
-              "type": "bytes32"
-            },
-            {
-              "indexed": false,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogCancel",
-          "type": "event"
-        },
-        "0x36d86c59e00bd73dc19ba3adfe068e4b64ac7e92be35546adeddf1b956a87e90": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "errorId",
-              "type": "uint8"
-            },
-            {
-              "indexed": true,
-              "name": "orderHash",
-              "type": "bytes32"
-            }
-          ],
-          "name": "LogError",
-          "type": "event"
-        }
-      },
-      "updated_at": 1503318938231,
-      "address": "0xb69e673309512a9d726f87304c6984054f87a93b"
-    }
-  },
-  "schema_version": "0.0.5",
-  "updated_at": 1503318938231
-}
diff --git a/src/artifacts/Token.json b/src/artifacts/Token.json
deleted file mode 100644
index e922ff66d..000000000
--- a/src/artifacts/Token.json
+++ /dev/null
@@ -1,176 +0,0 @@
-{
-  "contract_name": "Token",
-  "abi": [
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_spender",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "approve",
-      "outputs": [
-        {
-          "name": "success",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "totalSupply",
-      "outputs": [
-        {
-          "name": "supply",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_from",
-          "type": "address"
-        },
-        {
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "transferFrom",
-      "outputs": [
-        {
-          "name": "success",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_owner",
-          "type": "address"
-        }
-      ],
-      "name": "balanceOf",
-      "outputs": [
-        {
-          "name": "balance",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "transfer",
-      "outputs": [
-        {
-          "name": "success",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_owner",
-          "type": "address"
-        },
-        {
-          "name": "_spender",
-          "type": "address"
-        }
-      ],
-      "name": "allowance",
-      "outputs": [
-        {
-          "name": "remaining",
-          "type": "uint256"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "_from",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "_to",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "Transfer",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "_owner",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "_spender",
-          "type": "address"
-        },
-        {
-          "indexed": false,
-          "name": "_value",
-          "type": "uint256"
-        }
-      ],
-      "name": "Approval",
-      "type": "event"
-    }
-  ],
-  "unlinked_binary": "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",
-  "networks": {},
-  "schema_version": "0.0.5",
-  "updated_at": 1503317882695
-}
\ No newline at end of file
diff --git a/src/artifacts/TokenRegistry.json b/src/artifacts/TokenRegistry.json
deleted file mode 100644
index 5a0564a69..000000000
--- a/src/artifacts/TokenRegistry.json
+++ /dev/null
@@ -1,1211 +0,0 @@
-{
-  "contract_name": "TokenRegistry",
-  "abi": [
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_token",
-          "type": "address"
-        },
-        {
-          "name": "_index",
-          "type": "uint256"
-        }
-      ],
-      "name": "removeToken",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_name",
-          "type": "string"
-        }
-      ],
-      "name": "getTokenAddressByName",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_symbol",
-          "type": "string"
-        }
-      ],
-      "name": "getTokenAddressBySymbol",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_token",
-          "type": "address"
-        },
-        {
-          "name": "_swarmHash",
-          "type": "bytes"
-        }
-      ],
-      "name": "setTokenSwarmHash",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "_token",
-          "type": "address"
-        }
-      ],
-      "name": "getTokenMetaData",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        },
-        {
-          "name": "",
-          "type": "string"
-        },
-        {
-          "name": "",
-          "type": "string"
-        },
-        {
-          "name": "",
-          "type": "uint8"
-        },
-        {
-          "name": "",
-          "type": "bytes"
-        },
-        {
-          "name": "",
-          "type": "bytes"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "owner",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_token",
-          "type": "address"
-        },
-        {
-          "name": "_name",
-          "type": "string"
-        },
-        {
-          "name": "_symbol",
-          "type": "string"
-        },
-        {
-          "name": "_decimals",
-          "type": "uint8"
-        },
-        {
-          "name": "_ipfsHash",
-          "type": "bytes"
-        },
-        {
-          "name": "_swarmHash",
-          "type": "bytes"
-        }
-      ],
-      "name": "addToken",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "_token",
-          "type": "address"
-        },
-        {
-          "name": "_name",
-          "type": "string"
-        }
-      ],
-      "name": "setTokenName",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
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-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogAddToken",
-          "type": "event"
-        },
-        "0x32c54f1e2ea75844ded7517e7dbcd3895da7cd0c28f9ab9f9cf6ecf5f83762c6": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogRemoveToken",
-          "type": "event"
-        },
-        "0x4a6dbfc867b179991dec22ff19960f0a94d8d9d891fc556f547764670340e8ae": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldName",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newName",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenNameChange",
-          "type": "event"
-        },
-        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSymbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newSymbol",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenSymbolChange",
-          "type": "event"
-        },
-        "0x5b19f79ac4e8cfa820815502e11615f1a449e28155dc289ec5cac1a11f908694": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldIpfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newIpfsHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenIpfsHashChange",
-          "type": "event"
-        },
-        "0xc3168fdc13112e44a031057dbf6c609b33353addb4d8037d24543e22cbfe2acd": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSwarmHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newSwarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenSwarmHashChange",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502488442000,
-      "address": "0x926a74c5c36adf004c87399e65f75628b0f98d2c"
-    },
-    "3": {
-      "links": {},
-      "events": {
-        "0xd8d928b0b50ca11d9dc273236b46f3526515b03602f71f3a6af4f45bd9fa9144": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogAddToken",
-          "type": "event"
-        },
-        "0x32c54f1e2ea75844ded7517e7dbcd3895da7cd0c28f9ab9f9cf6ecf5f83762c6": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogRemoveToken",
-          "type": "event"
-        },
-        "0x4a6dbfc867b179991dec22ff19960f0a94d8d9d891fc556f547764670340e8ae": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldName",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newName",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenNameChange",
-          "type": "event"
-        },
-        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSymbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newSymbol",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenSymbolChange",
-          "type": "event"
-        },
-        "0x5b19f79ac4e8cfa820815502e11615f1a449e28155dc289ec5cac1a11f908694": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldIpfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newIpfsHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenIpfsHashChange",
-          "type": "event"
-        },
-        "0xc3168fdc13112e44a031057dbf6c609b33353addb4d8037d24543e22cbfe2acd": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSwarmHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newSwarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenSwarmHashChange",
-          "type": "event"
-        }
-      },
-      "updated_at": 1506602007000,
-      "address": "0x6b1a50f0bb5a7995444bd3877b22dc89c62843ed"
-    },
-    "42": {
-      "links": {},
-      "events": {
-        "0xd8d928b0b50ca11d9dc273236b46f3526515b03602f71f3a6af4f45bd9fa9144": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogAddToken",
-          "type": "event"
-        },
-        "0x32c54f1e2ea75844ded7517e7dbcd3895da7cd0c28f9ab9f9cf6ecf5f83762c6": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogRemoveToken",
-          "type": "event"
-        },
-        "0x4a6dbfc867b179991dec22ff19960f0a94d8d9d891fc556f547764670340e8ae": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldName",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newName",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenNameChange",
-          "type": "event"
-        },
-        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSymbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newSymbol",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenSymbolChange",
-          "type": "event"
-        },
-        "0x5b19f79ac4e8cfa820815502e11615f1a449e28155dc289ec5cac1a11f908694": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldIpfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newIpfsHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenIpfsHashChange",
-          "type": "event"
-        },
-        "0xc3168fdc13112e44a031057dbf6c609b33353addb4d8037d24543e22cbfe2acd": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSwarmHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newSwarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenSwarmHashChange",
-          "type": "event"
-        }
-      },
-      "updated_at": 1502391794385,
-      "address": "0xf18e504561f4347bea557f3d4558f559dddbae7f"
-    },
-    "50": {
-      "links": {},
-      "events": {
-        "0xd8d928b0b50ca11d9dc273236b46f3526515b03602f71f3a6af4f45bd9fa9144": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogAddToken",
-          "type": "event"
-        },
-        "0x32c54f1e2ea75844ded7517e7dbcd3895da7cd0c28f9ab9f9cf6ecf5f83762c6": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "name",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "symbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "decimals",
-              "type": "uint8"
-            },
-            {
-              "indexed": false,
-              "name": "ipfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "swarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogRemoveToken",
-          "type": "event"
-        },
-        "0x4a6dbfc867b179991dec22ff19960f0a94d8d9d891fc556f547764670340e8ae": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldName",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newName",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenNameChange",
-          "type": "event"
-        },
-        "0x53d878a6530e56c9bc96548fa0a8cae4f1d1f49c86b0e934c086b992ebb6998f": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSymbol",
-              "type": "string"
-            },
-            {
-              "indexed": false,
-              "name": "newSymbol",
-              "type": "string"
-            }
-          ],
-          "name": "LogTokenSymbolChange",
-          "type": "event"
-        },
-        "0x5b19f79ac4e8cfa820815502e11615f1a449e28155dc289ec5cac1a11f908694": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldIpfsHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newIpfsHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenIpfsHashChange",
-          "type": "event"
-        },
-        "0xc3168fdc13112e44a031057dbf6c609b33353addb4d8037d24543e22cbfe2acd": {
-          "anonymous": false,
-          "inputs": [
-            {
-              "indexed": true,
-              "name": "token",
-              "type": "address"
-            },
-            {
-              "indexed": false,
-              "name": "oldSwarmHash",
-              "type": "bytes"
-            },
-            {
-              "indexed": false,
-              "name": "newSwarmHash",
-              "type": "bytes"
-            }
-          ],
-          "name": "LogTokenSwarmHashChange",
-          "type": "event"
-        }
-      },
-      "updated_at": 1503318938228,
-      "address": "0x0b1ba0af832d7c05fd64161e0db78e85978e8082"
-    }
-  },
-  "schema_version": "0.0.5",
-  "updated_at": 1503318938228
-}
diff --git a/src/artifacts/TokenTransferProxy.json b/src/artifacts/TokenTransferProxy.json
deleted file mode 100644
index beeb16cfe..000000000
--- a/src/artifacts/TokenTransferProxy.json
+++ /dev/null
@@ -1,174 +0,0 @@
-{
-  "contract_name": "TokenTransferProxy",
-  "abi": [
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "token",
-          "type": "address"
-        },
-        {
-          "name": "from",
-          "type": "address"
-        },
-        {
-          "name": "to",
-          "type": "address"
-        },
-        {
-          "name": "value",
-          "type": "uint256"
-        }
-      ],
-      "name": "transferFrom",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "target",
-          "type": "address"
-        }
-      ],
-      "name": "addAuthorizedAddress",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "",
-          "type": "uint256"
-        }
-      ],
-      "name": "authorities",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "target",
-          "type": "address"
-        }
-      ],
-      "name": "removeAuthorizedAddress",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "owner",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [
-        {
-          "name": "",
-          "type": "address"
-        }
-      ],
-      "name": "authorized",
-      "outputs": [
-        {
-          "name": "",
-          "type": "bool"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": true,
-      "inputs": [],
-      "name": "getAuthorizedAddresses",
-      "outputs": [
-        {
-          "name": "",
-          "type": "address[]"
-        }
-      ],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "constant": false,
-      "inputs": [
-        {
-          "name": "newOwner",
-          "type": "address"
-        }
-      ],
-      "name": "transferOwnership",
-      "outputs": [],
-      "payable": false,
-      "type": "function"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "target",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "caller",
-          "type": "address"
-        }
-      ],
-      "name": "LogAuthorizedAddressAdded",
-      "type": "event"
-    },
-    {
-      "anonymous": false,
-      "inputs": [
-        {
-          "indexed": true,
-          "name": "target",
-          "type": "address"
-        },
-        {
-          "indexed": true,
-          "name": "caller",
-          "type": "address"
-        }
-      ],
-      "name": "LogAuthorizedAddressRemoved",
-      "type": "event"
-    }
-  ],
-  "unlinked_binary": "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",
-  "networks": {},
-  "schema_version": "0.0.5",
-  "updated_at": 1503318938227
-}
diff --git a/src/bignumber_config.ts b/src/bignumber_config.ts
deleted file mode 100644
index 2d5214e6f..000000000
--- a/src/bignumber_config.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import BigNumber from 'bignumber.js';
-
-export const bigNumberConfigs = {
-    configure() {
-        // By default BigNumber's `toString` method converts to exponential notation if the value has
-        // more then 20 digits. We want to avoid this behavior, so we set EXPONENTIAL_AT to a high number
-        BigNumber.config({
-            EXPONENTIAL_AT: 1000,
-        });
-    },
-};
diff --git a/src/contract.ts b/src/contract.ts
deleted file mode 100644
index 1aacc65dc..000000000
--- a/src/contract.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-import * as Web3 from 'web3';
-import * as _ from 'lodash';
-import promisify = require('es6-promisify');
-import {SchemaValidator, schemas} from '0x-json-schemas';
-import {AbiType} from './types';
-
-export class Contract implements Web3.ContractInstance {
-    public address: string;
-    public abi: Web3.ContractAbi;
-    private contract: Web3.ContractInstance;
-    private defaults: Partial<Web3.TxData>;
-    private validator: SchemaValidator;
-    // This class instance is going to be populated with functions and events depending on the ABI
-    // and we don't know their types in advance
-    [name: string]: any;
-    constructor(web3ContractInstance: Web3.ContractInstance, defaults: Partial<Web3.TxData>) {
-        this.contract = web3ContractInstance;
-        this.address = web3ContractInstance.address;
-        this.abi = web3ContractInstance.abi;
-        this.defaults = defaults;
-        this.populateEvents();
-        this.populateFunctions();
-        this.validator = new SchemaValidator();
-    }
-    private populateFunctions(): void {
-        const functionsAbi = _.filter(this.abi, abiPart => abiPart.type === AbiType.Function);
-        _.forEach(functionsAbi, (functionAbi: Web3.MethodAbi) => {
-            if (functionAbi.constant) {
-                const cbStyleCallFunction = this.contract[functionAbi.name].call;
-                this[functionAbi.name] = {
-                    callAsync: promisify(cbStyleCallFunction, this.contract),
-                };
-            } else {
-                const cbStyleFunction = this.contract[functionAbi.name];
-                const cbStyleEstimateGasFunction = this.contract[functionAbi.name].estimateGas;
-                this[functionAbi.name] = {
-                    estimateGasAsync: promisify(cbStyleEstimateGasFunction, this.contract),
-                    sendTransactionAsync: this.promisifyWithDefaultParams(cbStyleFunction),
-                };
-            }
-        });
-    }
-    private populateEvents(): void {
-        const eventsAbi = _.filter(this.abi, abiPart => abiPart.type === AbiType.Event);
-        _.forEach(eventsAbi, (eventAbi: Web3.EventAbi) => {
-            this[eventAbi.name] = this.contract[eventAbi.name];
-        });
-    }
-    private promisifyWithDefaultParams(fn: (...args: any[]) => void): (...args: any[]) => Promise<any> {
-        const promisifiedWithDefaultParams = (...args: any[]) => {
-            const promise = new Promise((resolve, reject) => {
-                const lastArg = args[args.length - 1];
-                let txData: Partial<Web3.TxData> = {};
-                if (this.isTxData(lastArg)) {
-                    txData = args.pop();
-                }
-                txData = {
-                    ...this.defaults,
-                    ...txData,
-                };
-                const callback = (err: Error, data: any) => {
-                    if (_.isNull(err)) {
-                        resolve(data);
-                    } else {
-                        reject(err);
-                    }
-                };
-                args.push(txData);
-                args.push(callback);
-                fn.apply(this.contract, args);
-            });
-            return promise;
-        };
-        return promisifiedWithDefaultParams;
-    }
-    private isTxData(lastArg: any): boolean {
-        const isValid = this.validator.isValid(lastArg, schemas.txDataSchema);
-        return isValid;
-    }
-}
diff --git a/src/contract_wrappers/contract_wrapper.ts b/src/contract_wrappers/contract_wrapper.ts
deleted file mode 100644
index 7997b1647..000000000
--- a/src/contract_wrappers/contract_wrapper.ts
+++ /dev/null
@@ -1,152 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import {BlockAndLogStreamer, Block} from 'ethereumjs-blockstream';
-import {Web3Wrapper} from '../web3_wrapper';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {
-    ZeroExError,
-    InternalZeroExError,
-    Artifact,
-    LogWithDecodedArgs,
-    RawLog,
-    ContractEvents,
-    SubscriptionOpts,
-    IndexedFilterValues,
-    EventCallback,
-    BlockParamLiteral,
-    ContractEventArgs,
-} from '../types';
-import {constants} from '../utils/constants';
-import {intervalUtils} from '../utils/interval_utils';
-import {filterUtils} from '../utils/filter_utils';
-
-export class ContractWrapper {
-    protected _web3Wrapper: Web3Wrapper;
-    private _abiDecoder?: AbiDecoder;
-    private _blockAndLogStreamer: BlockAndLogStreamer|undefined;
-    private _blockAndLogStreamInterval: NodeJS.Timer;
-    private _filters: {[filterToken: string]: Web3.FilterObject};
-    private _filterCallbacks: {[filterToken: string]: EventCallback<ContractEventArgs>};
-    private _onLogAddedSubscriptionToken: string|undefined;
-    private _onLogRemovedSubscriptionToken: string|undefined;
-    constructor(web3Wrapper: Web3Wrapper, abiDecoder?: AbiDecoder) {
-        this._web3Wrapper = web3Wrapper;
-        this._abiDecoder = abiDecoder;
-        this._filters = {};
-        this._filterCallbacks = {};
-        this._blockAndLogStreamer = undefined;
-        this._onLogAddedSubscriptionToken = undefined;
-        this._onLogRemovedSubscriptionToken = undefined;
-    }
-    /**
-     * Cancels all existing subscriptions
-     */
-    public unsubscribeAll(): void {
-        const filterTokens = _.keys(this._filterCallbacks);
-        _.each(filterTokens, filterToken => {
-            this._unsubscribe(filterToken);
-        });
-    }
-    protected _unsubscribe(filterToken: string, err?: Error): void {
-        if (_.isUndefined(this._filters[filterToken])) {
-            throw new Error(ZeroExError.SubscriptionNotFound);
-        }
-        if (!_.isUndefined(err)) {
-            const callback = this._filterCallbacks[filterToken];
-            callback(err, undefined);
-        }
-        delete this._filters[filterToken];
-        delete this._filterCallbacks[filterToken];
-        if (_.isEmpty(this._filters)) {
-            this._stopBlockAndLogStream();
-        }
-    }
-    protected _subscribe<ArgsType extends ContractEventArgs>(
-        address: string, eventName: ContractEvents, indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi,
-        callback: EventCallback<ArgsType>): string {
-        const filter = filterUtils.getFilter(address, eventName, indexFilterValues, abi);
-        if (_.isUndefined(this._blockAndLogStreamer)) {
-            this._startBlockAndLogStream();
-        }
-        const filterToken = filterUtils.generateUUID();
-        this._filters[filterToken] = filter;
-        this._filterCallbacks[filterToken] = callback;
-        return filterToken;
-    }
-    protected async _getLogsAsync<ArgsType extends ContractEventArgs>(
-        address: string, eventName: ContractEvents, subscriptionOpts: SubscriptionOpts,
-        indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
-        const filter = filterUtils.getFilter(address, eventName, indexFilterValues, abi, subscriptionOpts);
-        const logs = await this._web3Wrapper.getLogsAsync(filter);
-        const logsWithDecodedArguments = _.map(logs, this._tryToDecodeLogOrNoop.bind(this));
-        return logsWithDecodedArguments;
-    }
-    protected _tryToDecodeLogOrNoop<ArgsType extends ContractEventArgs>(
-        log: Web3.LogEntry): LogWithDecodedArgs<ArgsType>|RawLog {
-        if (_.isUndefined(this._abiDecoder)) {
-            throw new Error(InternalZeroExError.NoAbiDecoder);
-        }
-        const logWithDecodedArgs = this._abiDecoder.tryToDecodeLogOrNoop(log);
-        return logWithDecodedArgs;
-    }
-    protected async _instantiateContractIfExistsAsync<ContractType extends Web3.ContractInstance>(
-        artifact: Artifact, addressIfExists?: string): Promise<ContractType> {
-        const contractInstance =
-            await this._web3Wrapper.getContractInstanceFromArtifactAsync<ContractType>(artifact, addressIfExists);
-        return contractInstance;
-    }
-    private _onLogStateChanged<ArgsType extends ContractEventArgs>(removed: boolean, log: Web3.LogEntry): void {
-        _.forEach(this._filters, (filter: Web3.FilterObject, filterToken: string) => {
-            if (filterUtils.matchesFilter(log, filter)) {
-                const decodedLog = this._tryToDecodeLogOrNoop(log) as LogWithDecodedArgs<ArgsType>;
-                const logEvent = {
-                    ...decodedLog,
-                    removed,
-                };
-                this._filterCallbacks[filterToken](null, logEvent);
-            }
-        });
-    }
-    private _startBlockAndLogStream(): void {
-        this._blockAndLogStreamer = new BlockAndLogStreamer(
-            this._web3Wrapper.getBlockAsync.bind(this._web3Wrapper),
-            this._web3Wrapper.getLogsAsync.bind(this._web3Wrapper),
-        );
-        const catchAllLogFilter = {};
-        this._blockAndLogStreamer.addLogFilter(catchAllLogFilter);
-        this._blockAndLogStreamInterval = intervalUtils.setAsyncExcludingInterval(
-            this._reconcileBlockAsync.bind(this), constants.DEFAULT_BLOCK_POLLING_INTERVAL,
-        );
-        let removed = false;
-        this._onLogAddedSubscriptionToken = this._blockAndLogStreamer.subscribeToOnLogAdded(
-            this._onLogStateChanged.bind(this, removed),
-        );
-        removed = true;
-        this._onLogRemovedSubscriptionToken = this._blockAndLogStreamer.subscribeToOnLogRemoved(
-            this._onLogStateChanged.bind(this, removed),
-        );
-    }
-    private _stopBlockAndLogStream(): void {
-        (this._blockAndLogStreamer as BlockAndLogStreamer).unsubscribeFromOnLogAdded(
-            this._onLogAddedSubscriptionToken as string);
-        (this._blockAndLogStreamer as BlockAndLogStreamer).unsubscribeFromOnLogRemoved(
-            this._onLogRemovedSubscriptionToken as string);
-        intervalUtils.clearAsyncExcludingInterval(this._blockAndLogStreamInterval);
-        delete this._blockAndLogStreamer;
-    }
-    private async _reconcileBlockAsync(): Promise<void> {
-        try {
-            const latestBlock = await this._web3Wrapper.getBlockAsync(BlockParamLiteral.Latest);
-            // We need to coerce to Block type cause Web3.Block includes types for mempool blocks
-            if (!_.isUndefined(this._blockAndLogStreamer)) {
-                // If we clear the interval while fetching the block - this._blockAndLogStreamer will be undefined
-                this._blockAndLogStreamer.reconcileNewBlock(latestBlock as any as Block);
-            }
-        } catch (err) {
-            const filterTokens = _.keys(this._filterCallbacks);
-            _.each(filterTokens, filterToken => {
-                this._unsubscribe(filterToken, err);
-            });
-        }
-    }
-}
diff --git a/src/contract_wrappers/ether_token_wrapper.ts b/src/contract_wrappers/ether_token_wrapper.ts
deleted file mode 100644
index 3cd2f0224..000000000
--- a/src/contract_wrappers/ether_token_wrapper.ts
+++ /dev/null
@@ -1,87 +0,0 @@
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {Web3Wrapper} from '../web3_wrapper';
-import {ContractWrapper} from './contract_wrapper';
-import {TokenWrapper} from './token_wrapper';
-import {EtherTokenContract, ZeroExError} from '../types';
-import {assert} from '../utils/assert';
-import {artifacts} from '../artifacts';
-
-/**
- * This class includes all the functionality related to interacting with a wrapped Ether ERC20 token contract.
- * The caller can convert ETH into the equivalent number of wrapped ETH ERC20 tokens and back.
- */
-export class EtherTokenWrapper extends ContractWrapper {
-    private _etherTokenContractIfExists?: EtherTokenContract;
-    private _tokenWrapper: TokenWrapper;
-    private _contractAddressIfExists?: string;
-    constructor(web3Wrapper: Web3Wrapper, tokenWrapper: TokenWrapper, contractAddressIfExists?: string) {
-        super(web3Wrapper);
-        this._tokenWrapper = tokenWrapper;
-        this._contractAddressIfExists = contractAddressIfExists;
-    }
-    /**
-     * Deposit ETH into the Wrapped ETH smart contract and issues the equivalent number of wrapped ETH tokens
-     * to the depositor address. These wrapped ETH tokens can be used in 0x trades and are redeemable for 1-to-1
-     * for ETH.
-     * @param   amountInWei      Amount of ETH in Wei the caller wishes to deposit.
-     * @param   depositor   The hex encoded user Ethereum address that would like to make the deposit.
-     * @return Transaction hash.
-     */
-    public async depositAsync(amountInWei: BigNumber, depositor: string): Promise<string> {
-        assert.isValidBaseUnitAmount('amountInWei', amountInWei);
-        await assert.isSenderAddressAsync('depositor', depositor, this._web3Wrapper);
-
-        const ethBalanceInWei = await this._web3Wrapper.getBalanceInWeiAsync(depositor);
-        assert.assert(ethBalanceInWei.gte(amountInWei), ZeroExError.InsufficientEthBalanceForDeposit);
-
-        const wethContract = await this._getEtherTokenContractAsync();
-        const txHash = await wethContract.deposit.sendTransactionAsync({
-            from: depositor,
-            value: amountInWei,
-        });
-        return txHash;
-    }
-    /**
-     * Withdraw ETH to the withdrawer's address from the wrapped ETH smart contract in exchange for the
-     * equivalent number of wrapped ETH tokens.
-     * @param   amountInWei  Amount of ETH in Wei the caller wishes to withdraw.
-     * @param   withdrawer   The hex encoded user Ethereum address that would like to make the withdrawl.
-     * @return Transaction hash.
-     */
-    public async withdrawAsync(amountInWei: BigNumber, withdrawer: string): Promise<string> {
-        assert.isValidBaseUnitAmount('amountInWei', amountInWei);
-        await assert.isSenderAddressAsync('withdrawer', withdrawer, this._web3Wrapper);
-
-        const wethContractAddress = await this.getContractAddressAsync();
-        const WETHBalanceInBaseUnits = await this._tokenWrapper.getBalanceAsync(wethContractAddress, withdrawer);
-        assert.assert(WETHBalanceInBaseUnits.gte(amountInWei), ZeroExError.InsufficientWEthBalanceForWithdrawal);
-
-        const wethContract = await this._getEtherTokenContractAsync();
-        const txHash = await wethContract.withdraw.sendTransactionAsync(amountInWei, {
-            from: withdrawer,
-        });
-        return txHash;
-    }
-    /**
-     * Retrieves the Wrapped Ether token contract address
-     * @return  The Wrapped Ether token contract address
-     */
-    public async getContractAddressAsync(): Promise<string> {
-        const wethContract = await this._getEtherTokenContractAsync();
-        return wethContract.address;
-    }
-    private _invalidateContractInstance(): void {
-        delete this._etherTokenContractIfExists;
-    }
-    private async _getEtherTokenContractAsync(): Promise<EtherTokenContract> {
-        if (!_.isUndefined(this._etherTokenContractIfExists)) {
-            return this._etherTokenContractIfExists;
-        }
-        const contractInstance = await this._instantiateContractIfExistsAsync<EtherTokenContract>(
-            artifacts.EtherTokenArtifact, this._contractAddressIfExists,
-        );
-        this._etherTokenContractIfExists = contractInstance as EtherTokenContract;
-        return this._etherTokenContractIfExists;
-    }
-}
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
deleted file mode 100644
index fe0c5bc00..000000000
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ /dev/null
@@ -1,866 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import BigNumber from 'bignumber.js';
-import {schemas} from '0x-json-schemas';
-import {Web3Wrapper} from '../web3_wrapper';
-import {
-    ECSignature,
-    ExchangeContract,
-    ExchangeContractErrCodes,
-    ExchangeContractErrs,
-    ZeroExError,
-    OrderValues,
-    OrderAddresses,
-    Order,
-    SignedOrder,
-    ExchangeEvents,
-    SubscriptionOpts,
-    IndexedFilterValues,
-    OrderCancellationRequest,
-    OrderFillRequest,
-    LogErrorContractEventArgs,
-    LogFillContractEventArgs,
-    LogCancelContractEventArgs,
-    LogWithDecodedArgs,
-    MethodOpts,
-    ValidateOrderFillableOpts,
-    OrderTransactionOpts,
-    RawLog,
-    EventCallback,
-    ExchangeContractEventArgs,
-    DecodedLogArgs,
-} from '../types';
-import {assert} from '../utils/assert';
-import {utils} from '../utils/utils';
-import {OrderValidationUtils} from '../utils/order_validation_utils';
-import {ContractWrapper} from './contract_wrapper';
-import {TokenWrapper} from './token_wrapper';
-import {decorators} from '../utils/decorators';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {ExchangeTransferSimulator} from '../utils/exchange_transfer_simulator';
-import {artifacts} from '../artifacts';
-
-const SHOULD_VALIDATE_BY_DEFAULT = true;
-
-/**
- * This class includes all the functionality related to calling methods and subscribing to
- * events of the 0x Exchange smart contract.
- */
-export class ExchangeWrapper extends ContractWrapper {
-    private _exchangeContractIfExists?: ExchangeContract;
-    private _orderValidationUtils: OrderValidationUtils;
-    private _tokenWrapper: TokenWrapper;
-    private _exchangeContractErrCodesToMsg = {
-        [ExchangeContractErrCodes.ERROR_FILL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
-        [ExchangeContractErrCodes.ERROR_CANCEL_EXPIRED]: ExchangeContractErrs.OrderFillExpired,
-        [ExchangeContractErrCodes.ERROR_FILL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
-        [ExchangeContractErrCodes.ERROR_CANCEL_NO_VALUE]: ExchangeContractErrs.OrderRemainingFillAmountZero,
-        [ExchangeContractErrCodes.ERROR_FILL_TRUNCATION]: ExchangeContractErrs.OrderFillRoundingError,
-        [ExchangeContractErrCodes.ERROR_FILL_BALANCE_ALLOWANCE]: ExchangeContractErrs.FillBalanceAllowanceError,
-    };
-    private _contractAddressIfExists?: string;
-    private static _getOrderAddressesAndValues(order: Order): [OrderAddresses, OrderValues] {
-        const orderAddresses: OrderAddresses = [
-            order.maker,
-            order.taker,
-            order.makerTokenAddress,
-            order.takerTokenAddress,
-            order.feeRecipient,
-        ];
-        const orderValues: OrderValues = [
-            order.makerTokenAmount,
-            order.takerTokenAmount,
-            order.makerFee,
-            order.takerFee,
-            order.expirationUnixTimestampSec,
-            order.salt,
-        ];
-        return [orderAddresses, orderValues];
-    }
-    constructor(web3Wrapper: Web3Wrapper, abiDecoder: AbiDecoder,
-                tokenWrapper: TokenWrapper, contractAddressIfExists?: string) {
-        super(web3Wrapper, abiDecoder);
-        this._tokenWrapper = tokenWrapper;
-        this._orderValidationUtils = new OrderValidationUtils(tokenWrapper, this);
-        this._contractAddressIfExists = contractAddressIfExists;
-    }
-    /**
-     * Returns the unavailable takerAmount of an order. Unavailable amount is defined as the total
-     * amount that has been filled or cancelled. The remaining takerAmount can be calculated by
-     * subtracting the unavailable amount from the total order takerAmount.
-     * @param   orderHash               The hex encoded orderHash for which you would like to retrieve the
-     *                                  unavailable takerAmount.
-     * @param   methodOpts              Optional arguments this method accepts.
-     * @return  The amount of the order (in taker tokens) that has either been filled or canceled.
-     */
-    public async getUnavailableTakerAmountAsync(orderHash: string,
-                                                methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.doesConformToSchema('orderHash', orderHash, schemas.orderHashSchema);
-
-        const exchangeContract = await this._getExchangeContractAsync();
-        const defaultBlock = _.isUndefined(methodOpts) ? undefined : methodOpts.defaultBlock;
-        let unavailableTakerTokenAmount = await exchangeContract.getUnavailableTakerTokenAmount.callAsync(
-            orderHash, defaultBlock,
-        );
-        // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
-        unavailableTakerTokenAmount = new BigNumber(unavailableTakerTokenAmount);
-        return unavailableTakerTokenAmount;
-    }
-    /**
-     * Retrieve the takerAmount of an order that has already been filled.
-     * @param   orderHash    The hex encoded orderHash for which you would like to retrieve the filled takerAmount.
-     * @param   methodOpts   Optional arguments this method accepts.
-     * @return  The amount of the order (in taker tokens) that has already been filled.
-     */
-    public async getFilledTakerAmountAsync(orderHash: string, methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.doesConformToSchema('orderHash', orderHash, schemas.orderHashSchema);
-
-        const exchangeContract = await this._getExchangeContractAsync();
-        const defaultBlock = _.isUndefined(methodOpts) ? undefined : methodOpts.defaultBlock;
-        let fillAmountInBaseUnits = await exchangeContract.filled.callAsync(orderHash, defaultBlock);
-        // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
-        fillAmountInBaseUnits = new BigNumber(fillAmountInBaseUnits);
-        return fillAmountInBaseUnits;
-    }
-    /**
-     * Retrieve the takerAmount of an order that has been cancelled.
-     * @param   orderHash    The hex encoded orderHash for which you would like to retrieve the
-     *                       cancelled takerAmount.
-     * @param   methodOpts   Optional arguments this method accepts.
-     * @return  The amount of the order (in taker tokens) that has been cancelled.
-     */
-    public async getCanceledTakerAmountAsync(orderHash: string, methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.doesConformToSchema('orderHash', orderHash, schemas.orderHashSchema);
-
-        const exchangeContract = await this._getExchangeContractAsync();
-        const defaultBlock = _.isUndefined(methodOpts) ? undefined : methodOpts.defaultBlock;
-        let cancelledAmountInBaseUnits = await exchangeContract.cancelled.callAsync(orderHash, defaultBlock);
-        // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
-        cancelledAmountInBaseUnits = new BigNumber(cancelledAmountInBaseUnits);
-        return cancelledAmountInBaseUnits;
-    }
-    /**
-     * Fills a signed order with an amount denominated in baseUnits of the taker token.
-     * Since the order in which transactions are included in the next block is indeterminate, race-conditions
-     * could arise where a users balance or allowance changes before the fillOrder executes. Because of this,
-     * we allow you to specify `shouldThrowOnInsufficientBalanceOrAllowance`.
-     * If false, the smart contract will not throw if the parties
-     * do not have sufficient balances/allowances, preserving gas costs. Setting it to true forgoes this check
-     * and causes the smart contract to throw (using all the gas supplied) instead.
-     * @param   signedOrder                                 An object that conforms to the SignedOrder interface.
-     * @param   fillTakerTokenAmount                        The amount of the order (in taker tokens baseUnits) that
-     *                                                      you wish to fill.
-     * @param   shouldThrowOnInsufficientBalanceOrAllowance Whether or not you wish for the contract call to throw
-     *                                                      if upon execution the tokens cannot be transferred.
-     * @param   takerAddress                                The user Ethereum address who would like to fill this order.
-     *                                                      Must be available via the supplied Web3.Provider
-     *                                                      passed to 0x.js.
-     * @param   orderTransactionOpts                        Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async fillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber,
-                                shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                takerAddress: string,
-                                orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-            await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
-        }
-
-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
-
-        const gas = await exchangeInstance.fillOrder.estimateGasAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmount,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            signedOrder.ecSignature.v,
-            signedOrder.ecSignature.r,
-            signedOrder.ecSignature.s,
-            {
-                from: takerAddress,
-            },
-        );
-        const txHash: string = await exchangeInstance.fillOrder.sendTransactionAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmount,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            signedOrder.ecSignature.v,
-            signedOrder.ecSignature.r,
-            signedOrder.ecSignature.s,
-            {
-                from: takerAddress,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Sequentially and atomically fills signedOrders up to the specified takerTokenFillAmount.
-     * If the fill amount is reached - it succeeds and does not fill the rest of the orders.
-     * If fill amount is not reached - it fills as much of the fill amount as possible and succeeds.
-     * @param   signedOrders                                The array of signedOrders that you would like to fill until
-     *                                                      takerTokenFillAmount is reached.
-     * @param   fillTakerTokenAmount                        The total amount of the takerTokens you would like to fill.
-     * @param   shouldThrowOnInsufficientBalanceOrAllowance Whether or not you wish for the contract call to throw if
-     *                                                      upon execution any of the tokens cannot be transferred.
-     *                                                      If set to false, the call will continue to fill subsequent
-     *                                                      signedOrders even when some cannot be filled.
-     * @param   takerAddress                                The user Ethereum address who would like to fill these
-     *                                                      orders. Must be available via the supplied Web3.Provider
-     *                                                      passed to 0x.js.
-     * @param   orderTransactionOpts                        Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async fillOrdersUpToAsync(signedOrders: SignedOrder[], fillTakerTokenAmount: BigNumber,
-                                     shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                     takerAddress: string,
-                                     orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('signedOrders', signedOrders, schemas.signedOrdersSchema);
-        const takerTokenAddresses = _.map(signedOrders, signedOrder => signedOrder.takerTokenAddress);
-        assert.hasAtMostOneUniqueValue(takerTokenAddresses,
-                                       ExchangeContractErrs.MultipleTakerTokensInFillUpToDisallowed);
-        const exchangeContractAddresses = _.map(signedOrders, signedOrder => signedOrder.exchangeContractAddress);
-        assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
-                                       ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-            for (const signedOrder of signedOrders) {
-                await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
-            }
-        }
-
-        if (_.isEmpty(signedOrders)) {
-            throw new Error(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
-        }
-
-        const orderAddressesValuesAndSignatureArray = _.map(signedOrders, signedOrder => {
-            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(signedOrder),
-                signedOrder.ecSignature.v,
-                signedOrder.ecSignature.r,
-                signedOrder.ecSignature.s,
-            ];
-        });
-        // We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
-        const [orderAddressesArray, orderValuesArray, vArray, rArray, sArray] = _.unzip<any>(
-            orderAddressesValuesAndSignatureArray,
-        );
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const gas = await exchangeInstance.fillOrdersUpTo.estimateGasAsync(
-            orderAddressesArray,
-            orderValuesArray,
-            fillTakerTokenAmount,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            vArray,
-            rArray,
-            sArray,
-            {
-                from: takerAddress,
-            },
-        );
-        const txHash = await exchangeInstance.fillOrdersUpTo.sendTransactionAsync(
-            orderAddressesArray,
-            orderValuesArray,
-            fillTakerTokenAmount,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            vArray,
-            rArray,
-            sArray,
-            {
-                from: takerAddress,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Batch version of fillOrderAsync.
-     * Executes multiple fills atomically in a single transaction.
-     * If shouldThrowOnInsufficientBalanceOrAllowance is set to false, it will continue filling subsequent orders even
-     * when earlier ones fail.
-     * When shouldThrowOnInsufficientBalanceOrAllowance is set to true, if any fill fails, the entire batch fails.
-     * @param   orderFillRequests                               An array of objects that conform to the
-     *                                                          OrderFillRequest interface.
-     * @param   shouldThrowOnInsufficientBalanceOrAllowance     Whether or not you wish for the contract call to throw
-     *                                                          if upon execution any of the tokens cannot be
-     *                                                          transferred. If set to false, the call will continue to
-     *                                                          fill subsequent signedOrders even when some
-     *                                                          cannot be filled.
-     * @param   takerAddress                                    The user Ethereum address who would like to fill
-     *                                                          these orders. Must be available via the supplied
-     *                                                          Web3.Provider passed to 0x.js.
-     * @param   orderTransactionOpts                            Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async batchFillOrdersAsync(orderFillRequests: OrderFillRequest[],
-                                      shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                      takerAddress: string,
-                                      orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('orderFillRequests', orderFillRequests, schemas.orderFillRequestsSchema);
-        const exchangeContractAddresses = _.map(
-            orderFillRequests,
-            orderFillRequest => orderFillRequest.signedOrder.exchangeContractAddress,
-        );
-        assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
-                                       ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
-        assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-            for (const orderFillRequest of orderFillRequests) {
-                await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount,
-                    takerAddress, zrxTokenAddress,
-                );
-            }
-        }
-        if (_.isEmpty(orderFillRequests)) {
-            throw new Error(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
-        }
-
-        const orderAddressesValuesAmountsAndSignatureArray = _.map(orderFillRequests, orderFillRequest => {
-            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(orderFillRequest.signedOrder),
-                orderFillRequest.takerTokenFillAmount,
-                orderFillRequest.signedOrder.ecSignature.v,
-                orderFillRequest.signedOrder.ecSignature.r,
-                orderFillRequest.signedOrder.ecSignature.s,
-            ];
-        });
-        // We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
-        const [orderAddressesArray, orderValuesArray, fillTakerTokenAmounts, vArray, rArray, sArray] = _.unzip<any>(
-            orderAddressesValuesAmountsAndSignatureArray,
-        );
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const gas = await exchangeInstance.batchFillOrders.estimateGasAsync(
-            orderAddressesArray,
-            orderValuesArray,
-            fillTakerTokenAmounts,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            vArray,
-            rArray,
-            sArray,
-            {
-                from: takerAddress,
-            },
-        );
-        const txHash = await exchangeInstance.batchFillOrders.sendTransactionAsync(
-            orderAddressesArray,
-            orderValuesArray,
-            fillTakerTokenAmounts,
-            shouldThrowOnInsufficientBalanceOrAllowance,
-            vArray,
-            rArray,
-            sArray,
-            {
-                from: takerAddress,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Attempts to fill a specific amount of an order. If the entire amount specified cannot be filled,
-     * the fill order is abandoned.
-     * @param   signedOrder             An object that conforms to the SignedOrder interface. The
-     *                                  signedOrder you wish to fill.
-     * @param   fillTakerTokenAmount    The total amount of the takerTokens you would like to fill.
-     * @param   takerAddress            The user Ethereum address who would like to fill this order.
-     *                                  Must be available via the supplied Web3.Provider passed to 0x.js.
-     * @param   orderTransactionOpts    Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async fillOrKillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber,
-                                      takerAddress: string,
-                                      orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-            await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-                exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
-        }
-
-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
-
-        const gas = await exchangeInstance.fillOrKillOrder.estimateGasAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmount,
-            signedOrder.ecSignature.v,
-            signedOrder.ecSignature.r,
-            signedOrder.ecSignature.s,
-            {
-                from: takerAddress,
-            },
-        );
-        const txHash = await exchangeInstance.fillOrKillOrder.sendTransactionAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmount,
-            signedOrder.ecSignature.v,
-            signedOrder.ecSignature.r,
-            signedOrder.ecSignature.s,
-            {
-                from: takerAddress,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Batch version of fillOrKill. Allows a taker to specify a batch of orders that will either be atomically
-     * filled (each to the specified fillAmount) or aborted.
-     * @param   orderFillRequests           An array of objects that conform to the OrderFillRequest interface.
-     * @param   takerAddress                The user Ethereum address who would like to fill there orders.
-     *                                      Must be available via the supplied Web3.Provider passed to 0x.js.
-     * @param   orderTransactionOpts        Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async batchFillOrKillAsync(orderFillRequests: OrderFillRequest[],
-                                      takerAddress: string,
-                                      orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('orderFillRequests', orderFillRequests,
-                                   schemas.orderFillRequestsSchema);
-        const exchangeContractAddresses = _.map(
-            orderFillRequests,
-            orderFillRequest => orderFillRequest.signedOrder.exchangeContractAddress,
-        );
-        assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
-                                       ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-        if (_.isEmpty(orderFillRequests)) {
-            throw new Error(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
-        }
-        const exchangeInstance = await this._getExchangeContractAsync();
-
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-            const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-            for (const orderFillRequest of orderFillRequests) {
-                await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount,
-                    takerAddress, zrxTokenAddress,
-                );
-            }
-        }
-
-        const orderAddressesValuesAndTakerTokenFillAmounts = _.map(orderFillRequests, request => {
-            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(request.signedOrder),
-                request.takerTokenFillAmount,
-                request.signedOrder.ecSignature.v,
-                request.signedOrder.ecSignature.r,
-                request.signedOrder.ecSignature.s,
-            ];
-        });
-
-        // We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
-        const [orderAddresses, orderValues, fillTakerTokenAmounts, vParams, rParams, sParams] =
-              _.unzip<any>(orderAddressesValuesAndTakerTokenFillAmounts);
-
-        const gas = await exchangeInstance.batchFillOrKillOrders.estimateGasAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmounts,
-            vParams,
-            rParams,
-            sParams,
-            {
-                from: takerAddress,
-            },
-        );
-        const txHash = await exchangeInstance.batchFillOrKillOrders.sendTransactionAsync(
-            orderAddresses,
-            orderValues,
-            fillTakerTokenAmounts,
-            vParams,
-            rParams,
-            sParams,
-            {
-                from: takerAddress,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Cancel a given fill amount of an order. Cancellations are cumulative.
-     * @param   order                   An object that conforms to the Order or SignedOrder interface.
-     *                                  The order you would like to cancel.
-     * @param   cancelTakerTokenAmount  The amount (specified in taker tokens) that you would like to cancel.
-     * @param   transactionOpts         Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async cancelOrderAsync(order: Order|SignedOrder,
-                                  cancelTakerTokenAmount: BigNumber,
-                                  orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('order', order, schemas.orderSchema);
-        assert.isValidBaseUnitAmount('takerTokenCancelAmount', cancelTakerTokenAmount);
-        await assert.isSenderAddressAsync('order.maker', order.maker, this._web3Wrapper);
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            const orderHash = utils.getOrderHashHex(order);
-            const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
-            await this._orderValidationUtils.validateCancelOrderThrowIfInvalidAsync(
-                order, cancelTakerTokenAmount, unavailableTakerTokenAmount);
-        }
-
-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
-        const gas = await exchangeInstance.cancelOrder.estimateGasAsync(
-            orderAddresses,
-            orderValues,
-            cancelTakerTokenAmount,
-            {
-                from: order.maker,
-            },
-        );
-        const txHash = await exchangeInstance.cancelOrder.sendTransactionAsync(
-            orderAddresses,
-            orderValues,
-            cancelTakerTokenAmount,
-            {
-                from: order.maker,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Batch version of cancelOrderAsync. Atomically cancels multiple orders in a single transaction.
-     * All orders must be from the same maker.
-     * @param   orderCancellationRequests   An array of objects that conform to the OrderCancellationRequest
-     *                                      interface.
-     * @param   transactionOpts             Optional arguments this method accepts.
-     * @return  Transaction hash.
-     */
-    @decorators.contractCallErrorHandler
-    public async batchCancelOrdersAsync(orderCancellationRequests: OrderCancellationRequest[],
-                                        orderTransactionOpts?: OrderTransactionOpts): Promise<string> {
-        assert.doesConformToSchema('orderCancellationRequests', orderCancellationRequests,
-                                   schemas.orderCancellationRequestsSchema);
-        const exchangeContractAddresses = _.map(
-            orderCancellationRequests,
-            orderCancellationRequest => orderCancellationRequest.order.exchangeContractAddress,
-        );
-        assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
-                                       ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
-        const makers = _.map(orderCancellationRequests, cancellationRequest => cancellationRequest.order.maker);
-        assert.hasAtMostOneUniqueValue(makers, ExchangeContractErrs.MultipleMakersInSingleCancelBatchDisallowed);
-        const maker = makers[0];
-        await assert.isSenderAddressAsync('maker', maker, this._web3Wrapper);
-        const shouldValidate = _.isUndefined(orderTransactionOpts) ?
-            SHOULD_VALIDATE_BY_DEFAULT :
-            orderTransactionOpts.shouldValidate;
-        if (shouldValidate) {
-            for (const orderCancellationRequest of orderCancellationRequests) {
-                const orderHash = utils.getOrderHashHex(orderCancellationRequest.order);
-                const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
-                await this._orderValidationUtils.validateCancelOrderThrowIfInvalidAsync(
-                    orderCancellationRequest.order, orderCancellationRequest.takerTokenCancelAmount,
-                    unavailableTakerTokenAmount,
-                );
-            }
-
-        }
-        if (_.isEmpty(orderCancellationRequests)) {
-            throw new Error(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
-        }
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const orderAddressesValuesAndTakerTokenCancelAmounts = _.map(orderCancellationRequests, cancellationRequest => {
-            return [
-                ...ExchangeWrapper._getOrderAddressesAndValues(cancellationRequest.order),
-                cancellationRequest.takerTokenCancelAmount,
-            ];
-        });
-        // We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
-        const [orderAddresses, orderValues, cancelTakerTokenAmounts] =
-            _.unzip<any>(orderAddressesValuesAndTakerTokenCancelAmounts);
-        const gas = await exchangeInstance.batchCancelOrders.estimateGasAsync(
-            orderAddresses,
-            orderValues,
-            cancelTakerTokenAmounts,
-            {
-                from: maker,
-            },
-        );
-        const txHash = await exchangeInstance.batchCancelOrders.sendTransactionAsync(
-            orderAddresses,
-            orderValues,
-            cancelTakerTokenAmounts,
-            {
-                from: maker,
-                gas,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Subscribe to an event type emitted by the Exchange contract.
-     * @param   eventName           The exchange contract event you would like to subscribe to.
-     * @param   indexFilterValues   An object where the keys are indexed args returned by the event and
-     *                              the value is the value you are interested in. E.g `{maker: aUserAddressHex}`
-     * @param   callback            Callback that gets called when a log is added/removed
-     * @return Subscription token used later to unsubscribe
-     */
-    public async subscribeAsync<ArgsType extends ExchangeContractEventArgs>(
-        eventName: ExchangeEvents, indexFilterValues: IndexedFilterValues,
-        callback: EventCallback<ArgsType>): Promise<string> {
-        assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
-        assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
-        assert.isFunction('callback', callback);
-        const exchangeContractAddress = await this.getContractAddressAsync();
-        const subscriptionToken = this._subscribe<ArgsType>(
-            exchangeContractAddress, eventName, indexFilterValues, artifacts.ExchangeArtifact.abi, callback,
-        );
-        return subscriptionToken;
-    }
-    /**
-     * Cancel a subscription
-     * @param   subscriptionToken Subscription token returned by `subscribe()`
-     */
-    public unsubscribe(subscriptionToken: string): void {
-        this._unsubscribe(subscriptionToken);
-    }
-    /**
-     * Gets historical logs without creating a subscription
-     * @param   eventName           The exchange contract event you would like to subscribe to.
-     * @param   subscriptionOpts    Subscriptions options that let you configure the subscription.
-     * @param   indexFilterValues   An object where the keys are indexed args returned by the event and
-     *                              the value is the value you are interested in. E.g `{_from: aUserAddressHex}`
-     * @return  Array of logs that match the parameters
-     */
-    public async getLogsAsync<ArgsType extends ExchangeContractEventArgs>(
-        eventName: ExchangeEvents, subscriptionOpts: SubscriptionOpts, indexFilterValues: IndexedFilterValues,
-    ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
-        assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
-        assert.doesConformToSchema('subscriptionOpts', subscriptionOpts, schemas.subscriptionOptsSchema);
-        assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
-        const exchangeContractAddress = await this.getContractAddressAsync();
-        const logs = await this._getLogsAsync<ArgsType>(
-            exchangeContractAddress, eventName, subscriptionOpts, indexFilterValues, artifacts.ExchangeArtifact.abi,
-        );
-        return logs;
-    }
-    /**
-     * Retrieves the Ethereum address of the Exchange contract deployed on the network
-     * that the user-passed web3 provider is connected to.
-     * @returns The Ethereum address of the Exchange contract being used.
-     */
-    public async getContractAddressAsync(): Promise<string> {
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const exchangeAddress = exchangeInstance.address;
-        return exchangeAddress;
-    }
-    /**
-     * Checks if order is still fillable and throws an error otherwise. Useful for orderbook
-     * pruning where you want to remove stale orders without knowing who the taker will be.
-     * @param   signedOrder     An object that conforms to the SignedOrder interface. The
-     *                          signedOrder you wish to validate.
-     * @param   opts            An object that conforms to the ValidateOrderFillableOpts
-     *                          interface. Allows specifying a specific fillTakerTokenAmount
-     *                          to validate for.
-     */
-    public async validateOrderFillableOrThrowAsync(
-        signedOrder: SignedOrder, opts?: ValidateOrderFillableOpts,
-    ): Promise<void> {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-        const expectedFillTakerTokenAmount = !_.isUndefined(opts) ? opts.expectedFillTakerTokenAmount : undefined;
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-        await this._orderValidationUtils.validateOrderFillableOrThrowAsync(
-            exchangeTradeEmulator, signedOrder, zrxTokenAddress, expectedFillTakerTokenAmount,
-        );
-    }
-    /**
-     * Checks if order fill will succeed and throws an error otherwise.
-     * @param   signedOrder             An object that conforms to the SignedOrder interface. The
-     *                                  signedOrder you wish to fill.
-     * @param   fillTakerTokenAmount    The total amount of the takerTokens you would like to fill.
-     * @param   takerAddress            The user Ethereum address who would like to fill this order.
-     *                                  Must be available via the supplied Web3.Provider passed to 0x.js.
-     */
-    public async validateFillOrderThrowIfInvalidAsync(signedOrder: SignedOrder,
-                                                      fillTakerTokenAmount: BigNumber,
-                                                      takerAddress: string): Promise<void> {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-        const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-        await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
-    }
-    /**
-     * Checks if cancelling a given order will succeed and throws an informative error if it won't.
-     * @param   order                   An object that conforms to the Order or SignedOrder interface.
-     *                                  The order you would like to cancel.
-     * @param   cancelTakerTokenAmount  The amount (specified in taker tokens) that you would like to cancel.
-     */
-    public async validateCancelOrderThrowIfInvalidAsync(
-        order: Order, cancelTakerTokenAmount: BigNumber): Promise<void> {
-        assert.doesConformToSchema('order', order, schemas.orderSchema);
-        assert.isValidBaseUnitAmount('cancelTakerTokenAmount', cancelTakerTokenAmount);
-        const orderHash = utils.getOrderHashHex(order);
-        const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
-        await this._orderValidationUtils.validateCancelOrderThrowIfInvalidAsync(
-            order, cancelTakerTokenAmount, unavailableTakerTokenAmount);
-    }
-    /**
-     * Checks if calling fillOrKill on a given order will succeed and throws an informative error if it won't.
-     * @param   signedOrder             An object that conforms to the SignedOrder interface. The
-     *                                  signedOrder you wish to fill.
-     * @param   fillTakerTokenAmount    The total amount of the takerTokens you would like to fill.
-     * @param   takerAddress            The user Ethereum address who would like to fill this order.
-     *                                  Must be available via the supplied Web3.Provider passed to 0x.js.
-     */
-    public async validateFillOrKillOrderThrowIfInvalidAsync(signedOrder: SignedOrder,
-                                                            fillTakerTokenAmount: BigNumber,
-                                                            takerAddress: string): Promise<void> {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-        const zrxTokenAddress = await this.getZRXTokenAddressAsync();
-        const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper);
-        await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
-    }
-    /**
-     * Checks if rounding error will be > 0.1% when computing makerTokenAmount by doing:
-     * `(fillTakerTokenAmount * makerTokenAmount) / takerTokenAmount`.
-     * 0x Protocol does not accept any trades that result in large rounding errors. This means that tokens with few or
-     * no decimals can only be filled in quantities and ratios that avoid large rounding errors.
-     * @param   fillTakerTokenAmount   The amount of the order (in taker tokens baseUnits) that you wish to fill.
-     * @param   takerTokenAmount       The order size on the taker side
-     * @param   makerTokenAmount       The order size on the maker side
-     */
-    public async isRoundingErrorAsync(fillTakerTokenAmount: BigNumber,
-                                      takerTokenAmount: BigNumber,
-                                      makerTokenAmount: BigNumber): Promise<boolean> {
-        assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
-        assert.isValidBaseUnitAmount('takerTokenAmount', takerTokenAmount);
-        assert.isValidBaseUnitAmount('makerTokenAmount', makerTokenAmount);
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const isRoundingError = await exchangeInstance.isRoundingError.callAsync(
-            fillTakerTokenAmount, takerTokenAmount, makerTokenAmount,
-        );
-        return isRoundingError;
-    }
-    /**
-     * Checks if logs contain LogError, which is emmited by Exchange contract on transaction failure.
-     * @param   logs   Transaction logs as returned by `zeroEx.awaitTransactionMinedAsync`
-     */
-    public throwLogErrorsAsErrors(logs: Array<LogWithDecodedArgs<DecodedLogArgs>|Web3.LogEntry>): void {
-        const errLog = _.find(logs, {
-            event: ExchangeEvents.LogError,
-        }) as LogWithDecodedArgs<LogErrorContractEventArgs>|undefined;
-        if (!_.isUndefined(errLog)) {
-            const logArgs = errLog.args;
-            const errCode = logArgs.errorId.toNumber();
-            const errMessage = this._exchangeContractErrCodesToMsg[errCode];
-            throw new Error(errMessage);
-        }
-    }
-    /**
-     * Returns the ZRX token address used by the exchange contract.
-     * @return Address of ZRX token
-     */
-    public async getZRXTokenAddressAsync(): Promise<string> {
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const ZRXtokenAddress = await exchangeInstance.ZRX_TOKEN_CONTRACT.callAsync();
-        return ZRXtokenAddress;
-    }
-    private async _invalidateContractInstancesAsync(): Promise<void> {
-        this.unsubscribeAll();
-        delete this._exchangeContractIfExists;
-    }
-    private async _isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
-                                                          signerAddressHex: string): Promise<boolean> {
-        assert.isHexString('dataHex', dataHex);
-        assert.doesConformToSchema('ecSignature', ecSignature, schemas.ecSignatureSchema);
-        assert.isETHAddressHex('signerAddressHex', signerAddressHex);
-
-        const exchangeInstance = await this._getExchangeContractAsync();
-
-        const isValidSignature = await exchangeInstance.isValidSignature.callAsync(
-            signerAddressHex,
-            dataHex,
-            ecSignature.v,
-            ecSignature.r,
-            ecSignature.s,
-        );
-        return isValidSignature;
-    }
-    private async _getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
-        const orderHashHex = await exchangeInstance.getOrderHash.callAsync(orderAddresses, orderValues);
-        return orderHashHex;
-    }
-    private async _getExchangeContractAsync(): Promise<ExchangeContract> {
-        if (!_.isUndefined(this._exchangeContractIfExists)) {
-            return this._exchangeContractIfExists;
-        }
-        const contractInstance = await this._instantiateContractIfExistsAsync<ExchangeContract>(
-            artifacts.ExchangeArtifact, this._contractAddressIfExists,
-        );
-        this._exchangeContractIfExists = contractInstance as ExchangeContract;
-        return this._exchangeContractIfExists;
-    }
-    private async _getTokenTransferProxyAddressAsync(): Promise<string> {
-        const exchangeInstance = await this._getExchangeContractAsync();
-        const tokenTransferProxyAddress = await exchangeInstance.TOKEN_TRANSFER_PROXY_CONTRACT.callAsync();
-        const tokenTransferProxyAddressLowerCase = tokenTransferProxyAddress.toLowerCase();
-        return tokenTransferProxyAddressLowerCase;
-    }
-}
diff --git a/src/contract_wrappers/token_registry_wrapper.ts b/src/contract_wrappers/token_registry_wrapper.ts
deleted file mode 100644
index 2cc5a9aa0..000000000
--- a/src/contract_wrappers/token_registry_wrapper.ts
+++ /dev/null
@@ -1,122 +0,0 @@
-import * as _ from 'lodash';
-import {Web3Wrapper} from '../web3_wrapper';
-import {assert} from '../utils/assert';
-import {Token, TokenRegistryContract, TokenMetadata} from '../types';
-import {constants} from '../utils/constants';
-import {ContractWrapper} from './contract_wrapper';
-import {artifacts} from '../artifacts';
-
-/**
- * This class includes all the functionality related to interacting with the 0x Token Registry smart contract.
- */
-export class TokenRegistryWrapper extends ContractWrapper {
-    private _tokenRegistryContractIfExists?: TokenRegistryContract;
-    private _contractAddressIfExists?: string;
-    constructor(web3Wrapper: Web3Wrapper, contractAddressIfExists?: string) {
-        super(web3Wrapper);
-        this._contractAddressIfExists = contractAddressIfExists;
-    }
-    /**
-     * Retrieves all the tokens currently listed in the Token Registry smart contract
-     * @return  An array of objects that conform to the Token interface.
-     */
-    public async getTokensAsync(): Promise<Token[]> {
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-
-        const addresses = await this.getTokenAddressesAsync();
-        const tokenPromises: Array<Promise<Token|undefined>> = _.map(
-            addresses,
-            (address: string) => (this.getTokenIfExistsAsync(address)),
-        );
-        const tokens = await Promise.all(tokenPromises);
-        return tokens as Token[];
-    }
-    /**
-     * Retrieves all the addresses of the tokens currently listed in the Token Registry smart contract
-     * @return  An array of token addresses.
-     */
-    public async getTokenAddressesAsync(): Promise<string[]> {
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const addresses = await tokenRegistryContract.getTokenAddresses.callAsync();
-        return addresses;
-    }
-    /**
-     * Retrieves a token by address currently listed in the Token Registry smart contract
-     * @return  An object that conforms to the Token interface or undefined if token not found.
-     */
-    public async getTokenIfExistsAsync(address: string): Promise<Token|undefined> {
-        assert.isETHAddressHex('address', address);
-
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const metadata = await tokenRegistryContract.getTokenMetaData.callAsync(address);
-        const token = this._createTokenFromMetadata(metadata);
-        return token;
-    }
-    public async getTokenAddressBySymbolIfExistsAsync(symbol: string): Promise<string|undefined> {
-        assert.isString('symbol', symbol);
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const addressIfExists = await tokenRegistryContract.getTokenAddressBySymbol.callAsync(symbol);
-        if (addressIfExists === constants.NULL_ADDRESS) {
-            return undefined;
-        }
-        return addressIfExists;
-    }
-    public async getTokenAddressByNameIfExistsAsync(name: string): Promise<string|undefined> {
-        assert.isString('name', name);
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const addressIfExists = await tokenRegistryContract.getTokenAddressByName.callAsync(name);
-        if (addressIfExists === constants.NULL_ADDRESS) {
-            return undefined;
-        }
-        return addressIfExists;
-    }
-    public async getTokenBySymbolIfExistsAsync(symbol: string): Promise<Token|undefined> {
-        assert.isString('symbol', symbol);
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const metadata = await tokenRegistryContract.getTokenBySymbol.callAsync(symbol);
-        const token = this._createTokenFromMetadata(metadata);
-        return token;
-    }
-    public async getTokenByNameIfExistsAsync(name: string): Promise<Token|undefined> {
-        assert.isString('name', name);
-        const tokenRegistryContract = await this._getTokenRegistryContractAsync();
-        const metadata = await tokenRegistryContract.getTokenByName.callAsync(name);
-        const token = this._createTokenFromMetadata(metadata);
-        return token;
-    }
-    /**
-     * Retrieves the Ethereum address of the TokenRegistry contract deployed on the network
-     * that the user-passed web3 provider is connected to.
-     * @returns The Ethereum address of the TokenRegistry contract being used.
-     */
-    public async getContractAddressAsync(): Promise<string> {
-        const tokenRegistryInstance = await this._getTokenRegistryContractAsync();
-        const tokenRegistryAddress = tokenRegistryInstance.address;
-        return tokenRegistryAddress;
-    }
-    private _createTokenFromMetadata(metadata: TokenMetadata): Token|undefined {
-        if (metadata[0] === constants.NULL_ADDRESS) {
-            return undefined;
-        }
-        const token = {
-            address: metadata[0],
-            name: metadata[1],
-            symbol: metadata[2],
-            decimals: metadata[3].toNumber(),
-        };
-        return token;
-    }
-    private _invalidateContractInstance(): void {
-        delete this._tokenRegistryContractIfExists;
-    }
-    private async _getTokenRegistryContractAsync(): Promise<TokenRegistryContract> {
-        if (!_.isUndefined(this._tokenRegistryContractIfExists)) {
-            return this._tokenRegistryContractIfExists;
-        }
-        const contractInstance = await this._instantiateContractIfExistsAsync<TokenRegistryContract>(
-            artifacts.TokenRegistryArtifact, this._contractAddressIfExists,
-        );
-        this._tokenRegistryContractIfExists = contractInstance as TokenRegistryContract;
-        return this._tokenRegistryContractIfExists;
-    }
-}
diff --git a/src/contract_wrappers/token_transfer_proxy_wrapper.ts b/src/contract_wrappers/token_transfer_proxy_wrapper.ts
deleted file mode 100644
index f81845af9..000000000
--- a/src/contract_wrappers/token_transfer_proxy_wrapper.ts
+++ /dev/null
@@ -1,60 +0,0 @@
-import * as _ from 'lodash';
-import {Web3Wrapper} from '../web3_wrapper';
-import {ContractWrapper} from './contract_wrapper';
-import {artifacts} from '../artifacts';
-import {TokenTransferProxyContract} from '../types';
-
-/**
- * This class includes the functionality related to interacting with the TokenTransferProxy contract.
- */
-export class TokenTransferProxyWrapper extends ContractWrapper {
-    private _tokenTransferProxyContractIfExists?: TokenTransferProxyContract;
-    private _tokenTransferProxyContractAddressFetcher: () => Promise<string>;
-    constructor(web3Wrapper: Web3Wrapper, tokenTransferProxyContractAddressFetcher: () => Promise<string>) {
-        super(web3Wrapper);
-        this._tokenTransferProxyContractAddressFetcher = tokenTransferProxyContractAddressFetcher;
-    }
-    /**
-     * Check if the Exchange contract address is authorized by the TokenTransferProxy contract.
-     * @param   exchangeContractAddress     The hex encoded address of the Exchange contract to call.
-     * @return  Whether the exchangeContractAddress is authorized.
-     */
-    public async isAuthorizedAsync(exchangeContractAddress: string): Promise<boolean> {
-        const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
-        const isAuthorized = await tokenTransferProxyContractInstance.authorized.callAsync(exchangeContractAddress);
-        return isAuthorized;
-    }
-    /**
-     * Get the list of all Exchange contract addresses authorized by the TokenTransferProxy contract.
-     * @return  The list of authorized addresses.
-     */
-    public async getAuthorizedAddressesAsync(): Promise<string[]> {
-        const tokenTransferProxyContractInstance = await this._getTokenTransferProxyContractAsync();
-        const authorizedAddresses = await tokenTransferProxyContractInstance.getAuthorizedAddresses.callAsync();
-        return authorizedAddresses;
-    }
-    /**
-     * Retrieves the Ethereum address of the TokenTransferProxy contract deployed on the network
-     * that the user-passed web3 provider is connected to.
-     * @returns The Ethereum address of the TokenTransferProxy contract being used.
-     */
-    public async getContractAddressAsync(): Promise<string> {
-        const proxyInstance = await this._getTokenTransferProxyContractAsync();
-        const proxyAddress = proxyInstance.address;
-        return proxyAddress;
-    }
-    private _invalidateContractInstance(): void {
-        delete this._tokenTransferProxyContractIfExists;
-    }
-    private async _getTokenTransferProxyContractAsync(): Promise<TokenTransferProxyContract> {
-        if (!_.isUndefined(this._tokenTransferProxyContractIfExists)) {
-            return this._tokenTransferProxyContractIfExists;
-        }
-        const contractAddress = await this._tokenTransferProxyContractAddressFetcher();
-        const contractInstance = await this._instantiateContractIfExistsAsync<TokenTransferProxyContract>(
-            artifacts.TokenTransferProxyArtifact, contractAddress,
-        );
-        this._tokenTransferProxyContractIfExists = contractInstance as TokenTransferProxyContract;
-        return this._tokenTransferProxyContractIfExists;
-    }
-}
diff --git a/src/contract_wrappers/token_wrapper.ts b/src/contract_wrappers/token_wrapper.ts
deleted file mode 100644
index 614ac19d4..000000000
--- a/src/contract_wrappers/token_wrapper.ts
+++ /dev/null
@@ -1,313 +0,0 @@
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {schemas} from '0x-json-schemas';
-import {Web3Wrapper} from '../web3_wrapper';
-import {assert} from '../utils/assert';
-import {constants} from '../utils/constants';
-import {ContractWrapper} from './contract_wrapper';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {artifacts} from '../artifacts';
-import {
-    TokenContract,
-    ZeroExError,
-    TokenEvents,
-    IndexedFilterValues,
-    SubscriptionOpts,
-    MethodOpts,
-    LogWithDecodedArgs,
-    EventCallback,
-    TokenContractEventArgs,
-} from '../types';
-
-const ALLOWANCE_TO_ZERO_GAS_AMOUNT = 47275;
-
-/**
- * This class includes all the functionality related to interacting with ERC20 token contracts.
- * All ERC20 method calls are supported, along with some convenience methods for getting/setting allowances
- * to the 0x Proxy smart contract.
- */
-export class TokenWrapper extends ContractWrapper {
-    public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
-    private _tokenContractsByAddress: {[address: string]: TokenContract};
-    private _tokenTransferProxyContractAddressFetcher: () => Promise<string>;
-    constructor(web3Wrapper: Web3Wrapper, abiDecoder: AbiDecoder,
-                tokenTransferProxyContractAddressFetcher: () => Promise<string>) {
-        super(web3Wrapper, abiDecoder);
-        this._tokenContractsByAddress = {};
-        this._tokenTransferProxyContractAddressFetcher = tokenTransferProxyContractAddressFetcher;
-    }
-    /**
-     * Retrieves an owner's ERC20 token balance.
-     * @param   tokenAddress    The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress    The hex encoded user Ethereum address whose balance you would like to check.
-     * @param   methodOpts      Optional arguments this method accepts.
-     * @return  The owner's ERC20 token balance in base units.
-     */
-    public async getBalanceAsync(tokenAddress: string, ownerAddress: string,
-                                 methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.isETHAddressHex('ownerAddress', ownerAddress);
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-
-        const tokenContract = await this._getTokenContractAsync(tokenAddress);
-        const defaultBlock = _.isUndefined(methodOpts) ? undefined : methodOpts.defaultBlock;
-        let balance = await tokenContract.balanceOf.callAsync(ownerAddress, defaultBlock);
-        // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
-        balance = new BigNumber(balance);
-        return balance;
-    }
-    /**
-     * Sets the spender's allowance to a specified number of baseUnits on behalf of the owner address.
-     * Equivalent to the ERC20 spec method `approve`.
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress        The hex encoded user Ethereum address who would like to set an allowance
-     *                              for spenderAddress.
-     * @param   spenderAddress      The hex encoded user Ethereum address who will be able to spend the set allowance.
-     * @param   amountInBaseUnits   The allowance amount you would like to set.
-     * @return Transaction hash.
-     */
-    public async setAllowanceAsync(tokenAddress: string, ownerAddress: string, spenderAddress: string,
-                                   amountInBaseUnits: BigNumber): Promise<string> {
-        await assert.isSenderAddressAsync('ownerAddress', ownerAddress, this._web3Wrapper);
-        assert.isETHAddressHex('spenderAddress', spenderAddress);
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.isValidBaseUnitAmount('amountInBaseUnits', amountInBaseUnits);
-
-        const tokenContract = await this._getTokenContractAsync(tokenAddress);
-        // Hack: for some reason default estimated gas amount causes `base fee exceeds gas limit` exception
-        // on testrpc. Probably related to https://github.com/ethereumjs/testrpc/issues/294
-        // TODO: Debug issue in testrpc and submit a PR, then remove this hack
-        const networkIdIfExists = await this._web3Wrapper.getNetworkIdIfExistsAsync();
-        const gas = networkIdIfExists === constants.TESTRPC_NETWORK_ID ? ALLOWANCE_TO_ZERO_GAS_AMOUNT : undefined;
-        const txHash = await tokenContract.approve.sendTransactionAsync(spenderAddress, amountInBaseUnits, {
-            from: ownerAddress,
-            gas,
-        });
-        return txHash;
-    }
-    /**
-     * Sets the spender's allowance to an unlimited number of baseUnits on behalf of the owner address.
-     * Equivalent to the ERC20 spec method `approve`.
-     * Setting an unlimited allowance will lower the gas cost for filling orders involving tokens that forego updating
-     * allowances set to the max amount (e.g ZRX, WETH)
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress        The hex encoded user Ethereum address who would like to set an allowance
-     *                              for spenderAddress.
-     * @param   spenderAddress      The hex encoded user Ethereum address who will be able to spend the set allowance.
-     * @return Transaction hash.
-     */
-    public async setUnlimitedAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                            spenderAddress: string): Promise<string> {
-        const txHash = await this.setAllowanceAsync(
-            tokenAddress, ownerAddress, spenderAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-        );
-        return txHash;
-    }
-    /**
-     * Retrieves the owners allowance in baseUnits set to the spender's address.
-     * @param   tokenAddress    The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress    The hex encoded user Ethereum address whose allowance to spenderAddress
-     *                          you would like to retrieve.
-     * @param   spenderAddress  The hex encoded user Ethereum address who can spend the allowance you are fetching.
-     * @param   methodOpts      Optional arguments this method accepts.
-     */
-    public async getAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                   spenderAddress: string, methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.isETHAddressHex('ownerAddress', ownerAddress);
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-
-        const tokenContract = await this._getTokenContractAsync(tokenAddress);
-        const defaultBlock = _.isUndefined(methodOpts) ? undefined : methodOpts.defaultBlock;
-        let allowanceInBaseUnits = await tokenContract.allowance.callAsync(ownerAddress, spenderAddress, defaultBlock);
-        // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
-        allowanceInBaseUnits = new BigNumber(allowanceInBaseUnits);
-        return allowanceInBaseUnits;
-    }
-    /**
-     * Retrieves the owner's allowance in baseUnits set to the 0x proxy contract.
-     * @param   tokenAddress    The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress    The hex encoded user Ethereum address whose proxy contract allowance we are retrieving.
-     * @param   methodOpts      Optional arguments this method accepts.
-     */
-    public async getProxyAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                        methodOpts?: MethodOpts): Promise<BigNumber> {
-        assert.isETHAddressHex('ownerAddress', ownerAddress);
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-
-        const proxyAddress = await this._getTokenTransferProxyAddressAsync();
-        const allowanceInBaseUnits = await this.getAllowanceAsync(tokenAddress, ownerAddress, proxyAddress, methodOpts);
-        return allowanceInBaseUnits;
-    }
-    /**
-     * Sets the 0x proxy contract's allowance to a specified number of a tokens' baseUnits on behalf
-     * of an owner address.
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress        The hex encoded user Ethereum address who is setting an allowance
-     *                              for the Proxy contract.
-     * @param   amountInBaseUnits   The allowance amount specified in baseUnits.
-     * @return Transaction hash.
-     */
-    public async setProxyAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                        amountInBaseUnits: BigNumber): Promise<string> {
-        assert.isETHAddressHex('ownerAddress', ownerAddress);
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.isValidBaseUnitAmount('amountInBaseUnits', amountInBaseUnits);
-
-        const proxyAddress = await this._getTokenTransferProxyAddressAsync();
-        const txHash = await this.setAllowanceAsync(tokenAddress, ownerAddress, proxyAddress, amountInBaseUnits);
-        return txHash;
-    }
-    /**
-     * Sets the 0x proxy contract's allowance to a unlimited number of a tokens' baseUnits on behalf
-     * of an owner address.
-     * Setting an unlimited allowance will lower the gas cost for filling orders involving tokens that forego updating
-     * allowances set to the max amount (e.g ZRX, WETH)
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   ownerAddress        The hex encoded user Ethereum address who is setting an allowance
-     *                              for the Proxy contract.
-     * @return Transaction hash.
-     */
-    public async setUnlimitedProxyAllowanceAsync(tokenAddress: string, ownerAddress: string): Promise<string> {
-        const txHash = await this.setProxyAllowanceAsync(
-            tokenAddress, ownerAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
-        );
-        return txHash;
-    }
-    /**
-     * Transfers `amountInBaseUnits` ERC20 tokens from `fromAddress` to `toAddress`.
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   fromAddress         The hex encoded user Ethereum address that will send the funds.
-     * @param   toAddress           The hex encoded user Ethereum address that will receive the funds.
-     * @param   amountInBaseUnits   The amount (specified in baseUnits) of the token to transfer.
-     * @return Transaction hash.
-     */
-    public async transferAsync(tokenAddress: string, fromAddress: string, toAddress: string,
-                               amountInBaseUnits: BigNumber): Promise<string> {
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        await assert.isSenderAddressAsync('fromAddress', fromAddress, this._web3Wrapper);
-        assert.isETHAddressHex('toAddress', toAddress);
-        assert.isValidBaseUnitAmount('amountInBaseUnits', amountInBaseUnits);
-
-        const tokenContract = await this._getTokenContractAsync(tokenAddress);
-
-        const fromAddressBalance = await this.getBalanceAsync(tokenAddress, fromAddress);
-        if (fromAddressBalance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientBalanceForTransfer);
-        }
-
-        const txHash = await tokenContract.transfer.sendTransactionAsync(toAddress, amountInBaseUnits, {
-            from: fromAddress,
-        });
-        return txHash;
-    }
-    /**
-     * Transfers `amountInBaseUnits` ERC20 tokens from `fromAddress` to `toAddress`.
-     * Requires the fromAddress to have sufficient funds and to have approved an allowance of
-     * `amountInBaseUnits` to `senderAddress`.
-     * @param   tokenAddress        The hex encoded contract Ethereum address where the ERC20 token is deployed.
-     * @param   fromAddress         The hex encoded user Ethereum address whose funds are being sent.
-     * @param   toAddress           The hex encoded user Ethereum address that will receive the funds.
-     * @param   senderAddress       The hex encoded user Ethereum address whose initiates the fund transfer. The
-     *                              `fromAddress` must have set an allowance to the `senderAddress`
-     *                              before this call.
-     * @param   amountInBaseUnits   The amount (specified in baseUnits) of the token to transfer.
-     * @return Transaction hash.
-     */
-    public async transferFromAsync(tokenAddress: string, fromAddress: string, toAddress: string,
-                                   senderAddress: string, amountInBaseUnits: BigNumber):
-                                   Promise<string> {
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.isETHAddressHex('fromAddress', fromAddress);
-        assert.isETHAddressHex('toAddress', toAddress);
-        await assert.isSenderAddressAsync('senderAddress', senderAddress, this._web3Wrapper);
-        assert.isValidBaseUnitAmount('amountInBaseUnits', amountInBaseUnits);
-
-        const tokenContract = await this._getTokenContractAsync(tokenAddress);
-
-        const fromAddressAllowance = await this.getAllowanceAsync(tokenAddress, fromAddress, senderAddress);
-        if (fromAddressAllowance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientAllowanceForTransfer);
-        }
-
-        const fromAddressBalance = await this.getBalanceAsync(tokenAddress, fromAddress);
-        if (fromAddressBalance.lessThan(amountInBaseUnits)) {
-            throw new Error(ZeroExError.InsufficientBalanceForTransfer);
-        }
-
-        const txHash = await tokenContract.transferFrom.sendTransactionAsync(
-            fromAddress, toAddress, amountInBaseUnits,
-            {
-                from: senderAddress,
-            },
-        );
-        return txHash;
-    }
-    /**
-     * Subscribe to an event type emitted by the Token contract.
-     * @param   tokenAddress        The hex encoded address where the ERC20 token is deployed.
-     * @param   eventName           The token contract event you would like to subscribe to.
-     * @param   indexFilterValues   An object where the keys are indexed args returned by the event and
-     *                              the value is the value you are interested in. E.g `{maker: aUserAddressHex}`
-     * @param   callback            Callback that gets called when a log is added/removed
-     * @return Subscription token used later to unsubscribe
-     */
-    public subscribe<ArgsType extends TokenContractEventArgs>(
-        tokenAddress: string, eventName: TokenEvents, indexFilterValues: IndexedFilterValues,
-        callback: EventCallback<ArgsType>): string {
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, TokenEvents);
-        assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
-        assert.isFunction('callback', callback);
-        const subscriptionToken = this._subscribe<ArgsType>(
-            tokenAddress, eventName, indexFilterValues, artifacts.TokenArtifact.abi, callback,
-        );
-        return subscriptionToken;
-    }
-    /**
-     * Cancel a subscription
-     * @param   subscriptionToken Subscription token returned by `subscribe()`
-     */
-    public unsubscribe(subscriptionToken: string): void {
-        this._unsubscribe(subscriptionToken);
-    }
-    /**
-     * Gets historical logs without creating a subscription
-     * @param   tokenAddress        An address of the token that emmited the logs.
-     * @param   eventName           The token contract event you would like to subscribe to.
-     * @param   subscriptionOpts    Subscriptions options that let you configure the subscription.
-     * @param   indexFilterValues   An object where the keys are indexed args returned by the event and
-     *                              the value is the value you are interested in. E.g `{_from: aUserAddressHex}`
-     * @return  Array of logs that match the parameters
-     */
-    public async getLogsAsync<ArgsType extends TokenContractEventArgs>(
-        tokenAddress: string, eventName: TokenEvents, subscriptionOpts: SubscriptionOpts,
-        indexFilterValues: IndexedFilterValues): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
-        assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, TokenEvents);
-        assert.doesConformToSchema('subscriptionOpts', subscriptionOpts, schemas.subscriptionOptsSchema);
-        assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
-        const logs = await this._getLogsAsync<ArgsType>(
-            tokenAddress, eventName, subscriptionOpts, indexFilterValues, artifacts.TokenArtifact.abi,
-        );
-        return logs;
-    }
-    private _invalidateContractInstancesAsync(): void {
-        this.unsubscribeAll();
-        this._tokenContractsByAddress = {};
-    }
-    private async _getTokenContractAsync(tokenAddress: string): Promise<TokenContract> {
-        let tokenContract = this._tokenContractsByAddress[tokenAddress];
-        if (!_.isUndefined(tokenContract)) {
-            return tokenContract;
-        }
-        const contractInstance = await this._instantiateContractIfExistsAsync<TokenContract>(
-            artifacts.TokenArtifact, tokenAddress,
-        );
-        tokenContract = contractInstance as TokenContract;
-        this._tokenContractsByAddress[tokenAddress] = tokenContract;
-        return tokenContract;
-    }
-    private async _getTokenTransferProxyAddressAsync(): Promise<string> {
-        const tokenTransferProxyContractAddress = await this._tokenTransferProxyContractAddressFetcher();
-        return tokenTransferProxyContractAddress;
-    }
-}
diff --git a/src/globals.d.ts b/src/globals.d.ts
deleted file mode 100644
index cb3800056..000000000
--- a/src/globals.d.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-/// <reference types='chai-typescript-typings' />
-/// <reference types='chai-as-promised-typescript-typings' />
-declare module 'web3_beta';
-declare module 'chai-bignumber';
-declare module 'dirty-chai';
-declare module 'request-promise-native';
-declare module 'web3-provider-engine';
-declare module 'web3-provider-engine/subproviders/rpc';
-
-// HACK: In order to merge the bignumber declaration added by chai-bignumber to the chai Assertion
-// interface we must use `namespace` as the Chai definitelyTyped definition does. Since we otherwise
-// disallow `namespace`, we disable tslint for the following.
-/* tslint:disable */
-declare namespace Chai {
-    interface Assertion {
-        bignumber: Assertion;
-        // HACK: In order to comply with chai-as-promised we make eventually a `PromisedAssertion` not an `Assertion`
-        eventually: PromisedAssertion;
-    }
-}
-/* tslint:enable */
-
-declare module '*.json' {
-    const json: any;
-    /* tslint:disable */
-    export default json;
-    /* tslint:enable */
-}
-
-// find-version declarations
-declare function findVersions(version: string): string[];
-declare module 'find-versions' {
-    export = findVersions;
-}
-
-// compare-version declarations
-declare function compareVersions(firstVersion: string, secondVersion: string): number;
-declare module 'compare-versions' {
-    export = compareVersions;
-}
-
-// es6-promisify declarations
-declare function promisify(original: any, settings?: any): ((...arg: any[]) => Promise<any>);
-declare module 'es6-promisify' {
-    export = promisify;
-}
-
-declare module 'ethereumjs-abi' {
-    const soliditySHA3: (argTypes: string[], args: any[]) => Buffer;
-}
-
-// truffle-hdwallet-provider declarations
-declare module 'truffle-hdwallet-provider' {
-    import * as Web3 from 'web3';
-    class HDWalletProvider implements Web3.Provider {
-        constructor(mnemonic: string, rpcUrl: string);
-        public sendAsync(
-            payload: Web3.JSONRPCRequestPayload,
-            callback: (err: Error, result: Web3.JSONRPCResponsePayload) => void,
-        ): void;
-    }
-    export = HDWalletProvider;
-}
-
-// abi-decoder declarations
-interface DecodedLogArg {
-}
-interface DecodedLog {
-    name: string;
-    events: DecodedLogArg[];
-}
-declare module 'abi-decoder' {
-    import * as Web3 from 'web3';
-    const addABI: (abi: Web3.AbiDefinition) => void;
-    const decodeLogs: (logs: Web3.LogEntry[]) => DecodedLog[];
-}
-
-declare module 'web3/lib/solidity/coder' {
-    const decodeParams: (types: string[], data: string) => any[];
-}
diff --git a/src/globalsAugment.d.ts b/src/globalsAugment.d.ts
deleted file mode 100644
index 60e2312a3..000000000
--- a/src/globalsAugment.d.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-import BigNumber from 'bignumber.js';
-
-// HACK: This module overrides the Chai namespace so that we can use BigNumber types inside.
-// Source: https://github.com/Microsoft/TypeScript/issues/7352#issuecomment-191547232
-declare global {
-    // HACK: In order to merge the bignumber declaration added by chai-bignumber to the chai Assertion
-    // interface we must use `namespace` as the Chai definitelyTyped definition does. Since we otherwise
-    // disallow `namespace`, we disable tslint for the following.
-    /* tslint:disable */
-    namespace Chai {
-        interface NumberComparer {
-            (value: number|BigNumber, message?: string): Assertion;
-        }
-        interface NumericComparison {
-            greaterThan: NumberComparer;
-        }
-    }
-    /* tslint:enable */
-    interface DecodedLogArg {
-        name: string;
-        value: string|BigNumber;
-    }
-}
diff --git a/src/index.ts b/src/index.ts
deleted file mode 100644
index 1b3e893ba..000000000
--- a/src/index.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-export {ZeroEx} from './0x';
-
-export {
-    Order,
-    SignedOrder,
-    ECSignature,
-    ZeroExError,
-    EventCallback,
-    EventCallbackAsync,
-    EventCallbackSync,
-    ExchangeContractErrs,
-    ContractEvent,
-    Token,
-    ExchangeEvents,
-    TokenEvents,
-    IndexedFilterValues,
-    SubscriptionOpts,
-    BlockParam,
-    OrderCancellationRequest,
-    OrderFillRequest,
-    LogErrorContractEventArgs,
-    LogCancelContractEventArgs,
-    LogFillContractEventArgs,
-    ExchangeContractEventArgs,
-    TransferContractEventArgs,
-    ApprovalContractEventArgs,
-    TokenContractEventArgs,
-    ContractEventArgs,
-    ContractEventArg,
-    Web3Provider,
-    ZeroExConfig,
-    TransactionReceipt,
-    TransactionReceiptWithDecodedLogs,
-    LogWithDecodedArgs,
-    MethodOpts,
-    OrderTransactionOpts,
-    FilterObject,
-    LogEvent,
-    DecodedLogEvent,
-    EventWatcherCallback,
-    OnOrderStateChangeCallback,
-    OrderStateValid,
-    OrderStateInvalid,
-    OrderState,
-} from './types';
diff --git a/src/order_watcher/event_watcher.ts b/src/order_watcher/event_watcher.ts
deleted file mode 100644
index 81529a98c..000000000
--- a/src/order_watcher/event_watcher.ts
+++ /dev/null
@@ -1,88 +0,0 @@
-import * as Web3 from 'web3';
-import * as _ from 'lodash';
-import {Web3Wrapper} from '../web3_wrapper';
-import {
-    BlockParamLiteral,
-    EventCallback,
-    EventWatcherCallback,
-    ZeroExError,
-} from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {intervalUtils} from '../utils/interval_utils';
-import {assert} from '../utils/assert';
-import {utils} from '../utils/utils';
-
-const DEFAULT_EVENT_POLLING_INTERVAL = 200;
-
-enum LogEventState {
-    Removed,
-    Added,
-}
-
-/*
- * The EventWatcher watches for blockchain events at the specified block confirmation
- * depth.
- */
-export class EventWatcher {
-    private _web3Wrapper: Web3Wrapper;
-    private _pollingIntervalMs: number;
-    private _intervalIdIfExists?: NodeJS.Timer;
-    private _lastEvents: Web3.LogEntry[] = [];
-    constructor(web3Wrapper: Web3Wrapper, pollingIntervalMs: undefined|number) {
-        this._web3Wrapper = web3Wrapper;
-        this._pollingIntervalMs = _.isUndefined(pollingIntervalMs) ?
-                                    DEFAULT_EVENT_POLLING_INTERVAL :
-                                    pollingIntervalMs;
-    }
-    public subscribe(callback: EventWatcherCallback): void {
-        assert.isFunction('callback', callback);
-        if (!_.isUndefined(this._intervalIdIfExists)) {
-            throw new Error(ZeroExError.SubscriptionAlreadyPresent);
-        }
-        this._intervalIdIfExists = intervalUtils.setAsyncExcludingInterval(
-            this._pollForBlockchainEventsAsync.bind(this, callback), this._pollingIntervalMs,
-        );
-    }
-    public unsubscribe(): void {
-        this._lastEvents = [];
-        if (!_.isUndefined(this._intervalIdIfExists)) {
-            intervalUtils.clearAsyncExcludingInterval(this._intervalIdIfExists);
-            delete this._intervalIdIfExists;
-        }
-    }
-    private async _pollForBlockchainEventsAsync(callback: EventWatcherCallback): Promise<void> {
-        const pendingEvents = await this._getEventsAsync();
-        if (pendingEvents.length === 0) {
-            // HACK: Sometimes when node rebuilds the pending block we get back the empty result.
-            // We don't want to emit a lot of removal events and bring them back after a couple of miliseconds,
-            // that's why we just ignore those cases.
-            return;
-        }
-        const removedEvents = _.differenceBy(this._lastEvents, pendingEvents, JSON.stringify);
-        const newEvents = _.differenceBy(pendingEvents, this._lastEvents, JSON.stringify);
-        await this._emitDifferencesAsync(removedEvents, LogEventState.Removed, callback);
-        await this._emitDifferencesAsync(newEvents, LogEventState.Added, callback);
-        this._lastEvents = pendingEvents;
-    }
-    private async _getEventsAsync(): Promise<Web3.LogEntry[]> {
-        const eventFilter = {
-            fromBlock: BlockParamLiteral.Pending,
-            toBlock: BlockParamLiteral.Pending,
-        };
-        const events = await this._web3Wrapper.getLogsAsync(eventFilter);
-        return events;
-    }
-    private async _emitDifferencesAsync(
-        logs: Web3.LogEntry[], logEventState: LogEventState, callback: EventWatcherCallback,
-    ): Promise<void> {
-        for (const log of logs) {
-            const logEvent = {
-                removed: logEventState === LogEventState.Removed,
-                ...log,
-            };
-            if (!_.isUndefined(this._intervalIdIfExists)) {
-                await callback(logEvent);
-            }
-        }
-    }
-}
diff --git a/src/order_watcher/order_state_watcher.ts b/src/order_watcher/order_state_watcher.ts
deleted file mode 100644
index 139f13fdf..000000000
--- a/src/order_watcher/order_state_watcher.ts
+++ /dev/null
@@ -1,232 +0,0 @@
-import * as _ from 'lodash';
-import {schemas} from '0x-json-schemas';
-import {ZeroEx} from '../0x';
-import {EventWatcher} from './event_watcher';
-import {assert} from '../utils/assert';
-import {utils} from '../utils/utils';
-import {artifacts} from '../artifacts';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {OrderStateUtils} from '../utils/order_state_utils';
-import {
-    LogEvent,
-    OrderState,
-    SignedOrder,
-    Web3Provider,
-    BlockParamLiteral,
-    LogWithDecodedArgs,
-    ContractEventArgs,
-    OnOrderStateChangeCallback,
-    OrderStateWatcherConfig,
-    ApprovalContractEventArgs,
-    TransferContractEventArgs,
-    LogFillContractEventArgs,
-    LogCancelContractEventArgs,
-    ExchangeEvents,
-    TokenEvents,
-    ZeroExError,
-} from '../types';
-import {Web3Wrapper} from '../web3_wrapper';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {OrderFilledCancelledLazyStore} from '../stores/order_filled_cancelled_lazy_store';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-
-const DEFAULT_NUM_CONFIRMATIONS = 0;
-
-interface DependentOrderHashes {
-    [makerAddress: string]: {
-        [makerToken: string]: Set<string>,
-    };
-}
-
-interface OrderByOrderHash {
-    [orderHash: string]: SignedOrder;
-}
-
-/**
- * This class includes all the functionality related to watching a set of orders
- * for potential changes in order validity/fillability. The orderWatcher notifies
- * the subscriber of these changes so that a final decison can be made on whether
- * the order should be deemed invalid.
- */
-export class OrderStateWatcher {
-    private _orderByOrderHash: OrderByOrderHash = {};
-    private _dependentOrderHashes: DependentOrderHashes = {};
-    private _callbackIfExistsAsync?: OnOrderStateChangeCallback;
-    private _eventWatcher: EventWatcher;
-    private _web3Wrapper: Web3Wrapper;
-    private _abiDecoder: AbiDecoder;
-    private _orderStateUtils: OrderStateUtils;
-    private _orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore;
-    private _balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore;
-    constructor(
-        web3Wrapper: Web3Wrapper, abiDecoder: AbiDecoder, token: TokenWrapper, exchange: ExchangeWrapper,
-        config?: OrderStateWatcherConfig,
-    ) {
-        this._abiDecoder = abiDecoder;
-        this._web3Wrapper = web3Wrapper;
-        const eventPollingIntervalMs = _.isUndefined(config) ? undefined : config.eventPollingIntervalMs;
-        this._eventWatcher = new EventWatcher(web3Wrapper, eventPollingIntervalMs);
-        this._balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(token);
-        this._orderFilledCancelledLazyStore = new OrderFilledCancelledLazyStore(exchange);
-        this._orderStateUtils = new OrderStateUtils(
-            this._balanceAndProxyAllowanceLazyStore, this._orderFilledCancelledLazyStore,
-        );
-    }
-    /**
-     * Add an order to the orderStateWatcher. Before the order is added, it's
-     * signature is verified.
-     * @param   signedOrder     The order you wish to start watching.
-     */
-    public addOrder(signedOrder: SignedOrder): void {
-        assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
-        const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-        assert.isValidSignature(orderHash, signedOrder.ecSignature, signedOrder.maker);
-        this._orderByOrderHash[orderHash] = signedOrder;
-        this.addToDependentOrderHashes(signedOrder, orderHash);
-    }
-    /**
-     * Removes an order from the orderStateWatcher
-     * @param   orderHash     The orderHash of the order you wish to stop watching.
-     */
-    public removeOrder(orderHash: string): void {
-        assert.doesConformToSchema('orderHash', orderHash, schemas.orderHashSchema);
-        const signedOrder = this._orderByOrderHash[orderHash];
-        if (_.isUndefined(signedOrder)) {
-            return; // noop
-        }
-        delete this._orderByOrderHash[orderHash];
-        this.removeFromDependentOrderHashes(signedOrder.maker, signedOrder.makerTokenAddress, orderHash);
-    }
-    /**
-     * Starts an orderStateWatcher subscription. The callback will be called every time a watched order's
-     * backing blockchain state has changed. This is a call-to-action for the caller to re-validate the order.
-     * @param   callback            Receives the orderHash of the order that should be re-validated, together
-     *                              with all the order-relevant blockchain state needed to re-validate the order.
-     */
-    public subscribe(callback: OnOrderStateChangeCallback): void {
-        assert.isFunction('callback', callback);
-        if (!_.isUndefined(this._callbackIfExistsAsync)) {
-            throw new Error(ZeroExError.SubscriptionAlreadyPresent);
-        }
-        this._callbackIfExistsAsync = callback;
-        this._eventWatcher.subscribe(this._onEventWatcherCallbackAsync.bind(this));
-    }
-    /**
-     * Ends an orderStateWatcher subscription.
-     */
-    public unsubscribe(): void {
-        if (_.isUndefined(this._callbackIfExistsAsync)) {
-            throw new Error(ZeroExError.SubscriptionNotFound);
-        }
-        this._balanceAndProxyAllowanceLazyStore.deleteAll();
-        this._orderFilledCancelledLazyStore.deleteAll();
-        delete this._callbackIfExistsAsync;
-        this._eventWatcher.unsubscribe();
-    }
-    private async _onEventWatcherCallbackAsync(log: LogEvent): Promise<void> {
-        const maybeDecodedLog = this._abiDecoder.tryToDecodeLogOrNoop(log);
-        const isLogDecoded = !_.isUndefined((maybeDecodedLog as LogWithDecodedArgs<any>).event);
-        if (!isLogDecoded) {
-            return; // noop
-        }
-        const decodedLog = maybeDecodedLog as LogWithDecodedArgs<ContractEventArgs>;
-        let makerToken: string;
-        let makerAddress: string;
-        let orderHashesSet: Set<string>;
-        switch (decodedLog.event) {
-            case TokenEvents.Approval:
-            {
-                // Invalidate cache
-                const args = decodedLog.args as ApprovalContractEventArgs;
-                this._balanceAndProxyAllowanceLazyStore.deleteProxyAllowance(decodedLog.address, args._owner);
-                // Revalidate orders
-                makerToken = decodedLog.address;
-                makerAddress = args._owner;
-                orderHashesSet = _.get(this._dependentOrderHashes, [makerAddress, makerToken]);
-                if (!_.isUndefined(orderHashesSet)) {
-                    const orderHashes = Array.from(orderHashesSet);
-                    await this._emitRevalidateOrdersAsync(orderHashes);
-                }
-                break;
-            }
-            case TokenEvents.Transfer:
-            {
-                // Invalidate cache
-                const args = decodedLog.args as TransferContractEventArgs;
-                this._balanceAndProxyAllowanceLazyStore.deleteBalance(decodedLog.address, args._from);
-                this._balanceAndProxyAllowanceLazyStore.deleteBalance(decodedLog.address, args._to);
-                // Revalidate orders
-                makerToken = decodedLog.address;
-                makerAddress = args._from;
-                orderHashesSet = _.get(this._dependentOrderHashes, [makerAddress, makerToken]);
-                if (!_.isUndefined(orderHashesSet)) {
-                    const orderHashes = Array.from(orderHashesSet);
-                    await this._emitRevalidateOrdersAsync(orderHashes);
-                }
-                break;
-            }
-            case ExchangeEvents.LogFill:
-            {
-                // Invalidate cache
-                const args = decodedLog.args as LogFillContractEventArgs;
-                this._orderFilledCancelledLazyStore.deleteFilledTakerAmount(args.orderHash);
-                // Revalidate orders
-                const orderHash = args.orderHash;
-                const isOrderWatched = !_.isUndefined(this._orderByOrderHash[orderHash]);
-                if (isOrderWatched) {
-                    await this._emitRevalidateOrdersAsync([orderHash]);
-                }
-                break;
-            }
-            case ExchangeEvents.LogCancel:
-            {
-                // Invalidate cache
-                const args = decodedLog.args as LogCancelContractEventArgs;
-                this._orderFilledCancelledLazyStore.deleteCancelledTakerAmount(args.orderHash);
-                // Revalidate orders
-                const orderHash = args.orderHash;
-                const isOrderWatched = !_.isUndefined(this._orderByOrderHash[orderHash]);
-                if (isOrderWatched) {
-                    await this._emitRevalidateOrdersAsync([orderHash]);
-                }
-                break;
-            }
-            case ExchangeEvents.LogError:
-                return; // noop
-
-            default:
-                throw utils.spawnSwitchErr('decodedLog.event', decodedLog.event);
-        }
-    }
-    private async _emitRevalidateOrdersAsync(orderHashes: string[]): Promise<void> {
-        for (const orderHash of orderHashes) {
-            const signedOrder = this._orderByOrderHash[orderHash] as SignedOrder;
-            // Most of these calls will never reach the network because the data is fetched from stores
-            // and only updated when cache is invalidated
-            const orderState = await this._orderStateUtils.getOrderStateAsync(signedOrder);
-            if (_.isUndefined(this._callbackIfExistsAsync)) {
-                break; // Unsubscribe was called
-            }
-            await this._callbackIfExistsAsync(orderState);
-        }
-    }
-    private addToDependentOrderHashes(signedOrder: SignedOrder, orderHash: string) {
-        if (_.isUndefined(this._dependentOrderHashes[signedOrder.maker])) {
-            this._dependentOrderHashes[signedOrder.maker] = {};
-        }
-        if (_.isUndefined(this._dependentOrderHashes[signedOrder.maker][signedOrder.makerTokenAddress])) {
-            this._dependentOrderHashes[signedOrder.maker][signedOrder.makerTokenAddress] = new Set();
-        }
-        this._dependentOrderHashes[signedOrder.maker][signedOrder.makerTokenAddress].add(orderHash);
-    }
-    private removeFromDependentOrderHashes(makerAddress: string, makerTokenAddress: string, orderHash: string) {
-        this._dependentOrderHashes[makerAddress][makerTokenAddress].delete(orderHash);
-        if (this._dependentOrderHashes[makerAddress][makerTokenAddress].size === 0) {
-            delete this._dependentOrderHashes[makerAddress][makerTokenAddress];
-        }
-        if (_.isEmpty(this._dependentOrderHashes[makerAddress])) {
-            delete this._dependentOrderHashes[makerAddress];
-        }
-    }
-}
diff --git a/src/schemas/zero_ex_config_schema.ts b/src/schemas/zero_ex_config_schema.ts
deleted file mode 100644
index 6d4b3ed27..000000000
--- a/src/schemas/zero_ex_config_schema.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-export const zeroExConfigSchema = {
-    id: '/ZeroExConfig',
-    properties: {
-        gasPrice: {$ref: '/Number'},
-        exchangeContractAddress: {$ref: '/Address'},
-        tokenRegistryContractAddress: {$ref: '/Address'},
-        etherTokenContractAddress: {$ref: '/Address'},
-        orderWatcherConfig: {
-            type: 'object',
-            properties: {
-                pollingIntervalMs: {
-                    type: 'number',
-                    minimum: 0,
-                },
-                numConfirmations: {
-                    type: 'number',
-                    minimum: 0,
-                },
-            },
-        },
-    },
-    type: 'object',
-};
diff --git a/src/stores/balance_proxy_allowance_lazy_store.ts b/src/stores/balance_proxy_allowance_lazy_store.ts
deleted file mode 100644
index c83e61606..000000000
--- a/src/stores/balance_proxy_allowance_lazy_store.ts
+++ /dev/null
@@ -1,82 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import {BigNumber} from 'bignumber.js';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {BlockParamLiteral} from '../types';
-
-/**
- * Copy on read store for balances/proxyAllowances of tokens/accounts
- */
-export class BalanceAndProxyAllowanceLazyStore {
-    private token: TokenWrapper;
-    private balance: {
-        [tokenAddress: string]: {
-            [userAddress: string]: BigNumber,
-        },
-    };
-    private proxyAllowance: {
-        [tokenAddress: string]: {
-            [userAddress: string]: BigNumber,
-        },
-    };
-    constructor(token: TokenWrapper) {
-        this.token = token;
-        this.balance = {};
-        this.proxyAllowance = {};
-    }
-    public async getBalanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
-        if (_.isUndefined(this.balance[tokenAddress]) || _.isUndefined(this.balance[tokenAddress][userAddress])) {
-            const methodOpts = {
-                defaultBlock: BlockParamLiteral.Pending,
-            };
-            const balance = await this.token.getBalanceAsync(tokenAddress, userAddress, methodOpts);
-            this.setBalance(tokenAddress, userAddress, balance);
-        }
-        const cachedBalance = this.balance[tokenAddress][userAddress];
-        return cachedBalance;
-    }
-    public setBalance(tokenAddress: string, userAddress: string, balance: BigNumber): void {
-        if (_.isUndefined(this.balance[tokenAddress])) {
-            this.balance[tokenAddress] = {};
-        }
-        this.balance[tokenAddress][userAddress] = balance;
-    }
-    public deleteBalance(tokenAddress: string, userAddress: string): void {
-        if (!_.isUndefined(this.balance[tokenAddress])) {
-            delete this.balance[tokenAddress][userAddress];
-            if (_.isEmpty(this.balance[tokenAddress])) {
-                delete this.balance[tokenAddress];
-            }
-        }
-    }
-    public async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
-        if (_.isUndefined(this.proxyAllowance[tokenAddress]) ||
-            _.isUndefined(this.proxyAllowance[tokenAddress][userAddress])) {
-            const methodOpts = {
-                defaultBlock: BlockParamLiteral.Pending,
-            };
-            const proxyAllowance = await this.token.getProxyAllowanceAsync(tokenAddress, userAddress, methodOpts);
-            this.setProxyAllowance(tokenAddress, userAddress, proxyAllowance);
-        }
-        const cachedProxyAllowance = this.proxyAllowance[tokenAddress][userAddress];
-        return cachedProxyAllowance;
-    }
-    public setProxyAllowance(tokenAddress: string, userAddress: string, proxyAllowance: BigNumber): void {
-        if (_.isUndefined(this.proxyAllowance[tokenAddress])) {
-            this.proxyAllowance[tokenAddress] = {};
-        }
-        this.proxyAllowance[tokenAddress][userAddress] = proxyAllowance;
-    }
-    public deleteProxyAllowance(tokenAddress: string, userAddress: string): void {
-        if (!_.isUndefined(this.proxyAllowance[tokenAddress])) {
-            delete this.proxyAllowance[tokenAddress][userAddress];
-            if (_.isEmpty(this.proxyAllowance[tokenAddress])) {
-                delete this.proxyAllowance[tokenAddress];
-            }
-        }
-    }
-    public deleteAll(): void {
-        this.balance = {};
-        this.proxyAllowance = {};
-    }
-}
diff --git a/src/stores/order_filled_cancelled_lazy_store.ts b/src/stores/order_filled_cancelled_lazy_store.ts
deleted file mode 100644
index 9d74da096..000000000
--- a/src/stores/order_filled_cancelled_lazy_store.ts
+++ /dev/null
@@ -1,61 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import {BigNumber} from 'bignumber.js';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {BlockParamLiteral} from '../types';
-
-/**
- * Copy on read store for filled/cancelled taker amounts
- */
-export class OrderFilledCancelledLazyStore {
-    private exchange: ExchangeWrapper;
-    private filledTakerAmount: {
-        [orderHash: string]: BigNumber,
-    };
-    private cancelledTakerAmount: {
-        [orderHash: string]: BigNumber,
-    };
-    constructor(exchange: ExchangeWrapper) {
-        this.exchange = exchange;
-        this.filledTakerAmount = {};
-        this.cancelledTakerAmount = {};
-    }
-    public async getFilledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
-        if (_.isUndefined(this.filledTakerAmount[orderHash])) {
-            const methodOpts = {
-                defaultBlock: BlockParamLiteral.Pending,
-            };
-            const filledTakerAmount = await this.exchange.getFilledTakerAmountAsync(orderHash, methodOpts);
-            this.setFilledTakerAmount(orderHash, filledTakerAmount);
-        }
-        const cachedFilled = this.filledTakerAmount[orderHash];
-        return cachedFilled;
-    }
-    public setFilledTakerAmount(orderHash: string, filledTakerAmount: BigNumber): void {
-        this.filledTakerAmount[orderHash] = filledTakerAmount;
-    }
-    public deleteFilledTakerAmount(orderHash: string): void {
-        delete this.filledTakerAmount[orderHash];
-    }
-    public async getCancelledTakerAmountAsync(orderHash: string): Promise<BigNumber> {
-        if (_.isUndefined(this.cancelledTakerAmount[orderHash])) {
-            const methodOpts = {
-                defaultBlock: BlockParamLiteral.Pending,
-            };
-            const cancelledTakerAmount = await this.exchange.getCanceledTakerAmountAsync(orderHash, methodOpts);
-            this.setCancelledTakerAmount(orderHash, cancelledTakerAmount);
-        }
-        const cachedCancelled = this.cancelledTakerAmount[orderHash];
-        return cachedCancelled;
-    }
-    public setCancelledTakerAmount(orderHash: string, cancelledTakerAmount: BigNumber): void {
-        this.cancelledTakerAmount[orderHash] = cancelledTakerAmount;
-    }
-    public deleteCancelledTakerAmount(orderHash: string): void {
-        delete this.cancelledTakerAmount[orderHash];
-    }
-    public deleteAll(): void {
-        this.filledTakerAmount = {};
-        this.cancelledTakerAmount = {};
-    }
-}
diff --git a/src/subproviders/empty_wallet_subprovider.ts b/src/subproviders/empty_wallet_subprovider.ts
deleted file mode 100644
index 2f260217c..000000000
--- a/src/subproviders/empty_wallet_subprovider.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import {JSONRPCPayload} from '../types';
-
-/*
- * This class implements the web3-provider-engine subprovider interface and returns
- * that the provider has no addresses when queried.
- * Source: https://github.com/MetaMask/provider-engine/blob/master/subproviders/subprovider.js
- */
-export class EmptyWalletSubProvider {
-    public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error|null, result: any) => void) {
-        switch (payload.method) {
-            case 'eth_accounts':
-                end(null, []);
-                return;
-
-            default:
-                next();
-                return;
-        }
-    }
-    // Required to implement this method despite not needing it for this subprovider
-    public setEngine(engine: any) {
-        // noop
-    }
-}
diff --git a/src/types.ts b/src/types.ts
deleted file mode 100644
index 11683378f..000000000
--- a/src/types.ts
+++ /dev/null
@@ -1,525 +0,0 @@
-import * as Web3 from 'web3';
-import BigNumber from 'bignumber.js';
-
-export enum ZeroExError {
-    ContractDoesNotExist = 'CONTRACT_DOES_NOT_EXIST',
-    ExchangeContractDoesNotExist = 'EXCHANGE_CONTRACT_DOES_NOT_EXIST',
-    UnhandledError = 'UNHANDLED_ERROR',
-    UserHasNoAssociatedAddress = 'USER_HAS_NO_ASSOCIATED_ADDRESSES',
-    InvalidSignature = 'INVALID_SIGNATURE',
-    ContractNotDeployedOnNetwork = 'CONTRACT_NOT_DEPLOYED_ON_NETWORK',
-    InsufficientAllowanceForTransfer = 'INSUFFICIENT_ALLOWANCE_FOR_TRANSFER',
-    InsufficientBalanceForTransfer = 'INSUFFICIENT_BALANCE_FOR_TRANSFER',
-    InsufficientEthBalanceForDeposit = 'INSUFFICIENT_ETH_BALANCE_FOR_DEPOSIT',
-    InsufficientWEthBalanceForWithdrawal = 'INSUFFICIENT_WETH_BALANCE_FOR_WITHDRAWAL',
-    InvalidJump = 'INVALID_JUMP',
-    OutOfGas = 'OUT_OF_GAS',
-    NoNetworkId = 'NO_NETWORK_ID',
-    SubscriptionNotFound = 'SUBSCRIPTION_NOT_FOUND',
-    SubscriptionAlreadyPresent = 'SUBSCRIPTION_ALREADY_PRESENT',
-    TransactionMiningTimeout = 'TRANSACTION_MINING_TIMEOUT',
-}
-
-export enum InternalZeroExError {
-    NoAbiDecoder = 'NO_ABI_DECODER',
-    ZrxNotInTokenRegistry = 'ZRX_NOT_IN_TOKEN_REGISTRY',
-}
-
-/**
- * Elliptic Curve signature
- */
-export interface ECSignature {
-    v: number;
-    r: string;
-    s: string;
-}
-
-export type OrderAddresses = [string, string, string, string, string];
-
-export type OrderValues = [BigNumber, BigNumber, BigNumber,
-                           BigNumber, BigNumber, BigNumber];
-
-export type LogEvent = Web3.LogEntryEvent;
-export type DecodedLogEvent<ArgsType> = Web3.DecodedLogEntryEvent<ArgsType>;
-
-export type EventCallbackAsync<ArgsType> = (err: null|Error, log?: DecodedLogEvent<ArgsType>) => Promise<void>;
-export type EventCallbackSync<ArgsType> = (err: null|Error, log?: DecodedLogEvent<ArgsType>) => void;
-export type EventCallback<ArgsType> = EventCallbackSync<ArgsType>|EventCallbackAsync<ArgsType>;
-
-export type EventWatcherCallbackSync = (log: LogEvent) => void;
-export type EventWatcherCallbackAsync = (log: LogEvent) => Promise<void>;
-export type EventWatcherCallback = EventWatcherCallbackSync|EventWatcherCallbackAsync;
-
-export interface ExchangeContract extends Web3.ContractInstance {
-    isValidSignature: {
-        callAsync: (signerAddressHex: string, dataHex: string, v: number, r: string, s: string,
-                    txOpts?: TxOpts) => Promise<boolean>;
-    };
-    ZRX_TOKEN_CONTRACT: {
-        callAsync: () => Promise<string>;
-    };
-    TOKEN_TRANSFER_PROXY_CONTRACT: {
-        callAsync: () => Promise<string>;
-    };
-    getUnavailableTakerTokenAmount: {
-        callAsync: (orderHash: string, defaultBlock?: Web3.BlockParam) => Promise<BigNumber>;
-    };
-    isRoundingError: {
-        callAsync: (takerTokenFillAmount: BigNumber, takerTokenAmount: BigNumber,
-                    makerTokenAmount: BigNumber, txOpts?: TxOpts) => Promise<boolean>;
-    };
-    fillOrder: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                               fillTakerTokenAmount: BigNumber,
-                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                               v: number, r: string, s: string, txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                           fillTakerTokenAmount: BigNumber,
-                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                           v: number, r: string, s: string, txOpts?: TxOpts) => Promise<number>;
-    };
-    batchFillOrders: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                               fillTakerTokenAmounts: BigNumber[],
-                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                               v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                           fillTakerTokenAmounts: BigNumber[],
-                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
-    };
-    fillOrdersUpTo: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                               fillTakerTokenAmount: BigNumber,
-                               shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                               v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                           fillTakerTokenAmount: BigNumber,
-                           shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
-    };
-    cancelOrder: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                               cancelTakerTokenAmount: BigNumber, txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                           cancelTakerTokenAmount: BigNumber,
-                           txOpts?: TxOpts) => Promise<number>;
-    };
-    batchCancelOrders: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                               cancelTakerTokenAmounts: BigNumber[], txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                           cancelTakerTokenAmounts: BigNumber[],
-                           txOpts?: TxOpts) => Promise<number>;
-    };
-    fillOrKillOrder: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                               fillTakerTokenAmount: BigNumber,
-                               v: number, r: string, s: string, txOpts?: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues,
-                           fillTakerTokenAmount: BigNumber,
-                           v: number, r: string, s: string, txOpts?: TxOpts) => Promise<number>;
-    };
-    batchFillOrKillOrders: {
-        sendTransactionAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                               fillTakerTokenAmounts: BigNumber[],
-                               v: number[], r: string[], s: string[], txOpts: TxOpts) => Promise<string>;
-        estimateGasAsync: (orderAddresses: OrderAddresses[], orderValues: OrderValues[],
-                           fillTakerTokenAmounts: BigNumber[],
-                           v: number[], r: string[], s: string[], txOpts?: TxOpts) => Promise<number>;
-    };
-    filled: {
-        callAsync: (orderHash: string, defaultBlock?: Web3.BlockParam) => Promise<BigNumber>;
-    };
-    cancelled: {
-        callAsync: (orderHash: string, defaultBlock?: Web3.BlockParam) => Promise<BigNumber>;
-    };
-    getOrderHash: {
-        callAsync: (orderAddresses: OrderAddresses, orderValues: OrderValues) => Promise<string>;
-    };
-}
-
-export interface TokenContract extends Web3.ContractInstance {
-    balanceOf: {
-        callAsync: (address: string, defaultBlock?: Web3.BlockParam) => Promise<BigNumber>;
-    };
-    allowance: {
-        callAsync: (ownerAddress: string, allowedAddress: string,
-                    defaultBlock?: Web3.BlockParam) => Promise<BigNumber>;
-    };
-    transfer: {
-        sendTransactionAsync: (toAddress: string, amountInBaseUnits: BigNumber,
-                               txOpts?: TxOpts) => Promise<string>;
-    };
-    transferFrom: {
-        sendTransactionAsync: (fromAddress: string, toAddress: string, amountInBaseUnits: BigNumber,
-                               txOpts?: TxOpts) => Promise<string>;
-    };
-    approve: {
-        sendTransactionAsync: (proxyAddress: string, amountInBaseUnits: BigNumber,
-                               txOpts?: TxOpts) => Promise<string>;
-    };
-}
-
-export interface TokenRegistryContract extends Web3.ContractInstance {
-    getTokenMetaData: {
-        callAsync: (address: string) => Promise<TokenMetadata>;
-    };
-    getTokenAddresses: {
-        callAsync: () => Promise<string[]>;
-    };
-    getTokenAddressBySymbol: {
-        callAsync: (symbol: string) => Promise<string>;
-    };
-    getTokenAddressByName: {
-        callAsync: (name: string) => Promise<string>;
-    };
-    getTokenBySymbol: {
-        callAsync: (symbol: string) => Promise<TokenMetadata>;
-    };
-    getTokenByName: {
-        callAsync: (name: string) => Promise<TokenMetadata>;
-    };
-}
-
-export interface EtherTokenContract extends Web3.ContractInstance {
-    deposit: {
-        sendTransactionAsync: (txOpts: TxOpts) => Promise<string>;
-    };
-    withdraw: {
-        sendTransactionAsync: (amount: BigNumber, txOpts: TxOpts) => Promise<string>;
-    };
-}
-
-export interface TokenTransferProxyContract extends Web3.ContractInstance {
-    getAuthorizedAddresses: {
-        callAsync: () => Promise<string[]>;
-    };
-    authorized: {
-        callAsync: (address: string) => Promise<boolean>;
-    };
-}
-
-export enum SolidityTypes {
-    Address = 'address',
-    Uint256 = 'uint256',
-    Uint8 = 'uint8',
-    Uint = 'uint',
-}
-
-export enum ExchangeContractErrCodes {
-    ERROR_FILL_EXPIRED, // Order has already expired
-    ERROR_FILL_NO_VALUE, // Order has already been fully filled or cancelled
-    ERROR_FILL_TRUNCATION, // Rounding error too large
-    ERROR_FILL_BALANCE_ALLOWANCE, // Insufficient balance or allowance for token transfer
-    ERROR_CANCEL_EXPIRED, // Order has already expired
-    ERROR_CANCEL_NO_VALUE, // Order has already been fully filled or cancelled
-}
-
-export enum ExchangeContractErrs {
-    OrderFillExpired = 'ORDER_FILL_EXPIRED',
-    OrderCancelExpired = 'ORDER_CANCEL_EXPIRED',
-    OrderCancelAmountZero = 'ORDER_CANCEL_AMOUNT_ZERO',
-    OrderAlreadyCancelledOrFilled = 'ORDER_ALREADY_CANCELLED_OR_FILLED',
-    OrderFillAmountZero = 'ORDER_FILL_AMOUNT_ZERO',
-    OrderRemainingFillAmountZero = 'ORDER_REMAINING_FILL_AMOUNT_ZERO',
-    OrderFillRoundingError = 'ORDER_FILL_ROUNDING_ERROR',
-    FillBalanceAllowanceError = 'FILL_BALANCE_ALLOWANCE_ERROR',
-    InsufficientTakerBalance = 'INSUFFICIENT_TAKER_BALANCE',
-    InsufficientTakerAllowance = 'INSUFFICIENT_TAKER_ALLOWANCE',
-    InsufficientMakerBalance = 'INSUFFICIENT_MAKER_BALANCE',
-    InsufficientMakerAllowance = 'INSUFFICIENT_MAKER_ALLOWANCE',
-    InsufficientTakerFeeBalance = 'INSUFFICIENT_TAKER_FEE_BALANCE',
-    InsufficientTakerFeeAllowance = 'INSUFFICIENT_TAKER_FEE_ALLOWANCE',
-    InsufficientMakerFeeBalance = 'INSUFFICIENT_MAKER_FEE_BALANCE',
-    InsufficientMakerFeeAllowance = 'INSUFFICIENT_MAKER_FEE_ALLOWANCE',
-    TransactionSenderIsNotFillOrderTaker = 'TRANSACTION_SENDER_IS_NOT_FILL_ORDER_TAKER',
-    MultipleMakersInSingleCancelBatchDisallowed = 'MULTIPLE_MAKERS_IN_SINGLE_CANCEL_BATCH_DISALLOWED',
-    InsufficientRemainingFillAmount = 'INSUFFICIENT_REMAINING_FILL_AMOUNT',
-    MultipleTakerTokensInFillUpToDisallowed = 'MULTIPLE_TAKER_TOKENS_IN_FILL_UP_TO_DISALLOWED',
-    BatchOrdersMustHaveSameExchangeAddress = 'BATCH_ORDERS_MUST_HAVE_SAME_EXCHANGE_ADDRESS',
-    BatchOrdersMustHaveAtLeastOneItem = 'BATCH_ORDERS_MUST_HAVE_AT_LEAST_ONE_ITEM',
-}
-
-export type RawLog = Web3.LogEntry;
-
-export interface ContractEvent {
-    logIndex: number;
-    transactionIndex: number;
-    transactionHash: string;
-    blockHash: string;
-    blockNumber: number;
-    address: string;
-    type: string;
-    event: string;
-    args: ContractEventArgs;
-}
-
-export interface LogFillContractEventArgs {
-    maker: string;
-    taker: string;
-    feeRecipient: string;
-    makerToken: string;
-    takerToken: string;
-    filledMakerTokenAmount: BigNumber;
-    filledTakerTokenAmount: BigNumber;
-    paidMakerFee: BigNumber;
-    paidTakerFee: BigNumber;
-    tokens: string;
-    orderHash: string;
-}
-export interface LogCancelContractEventArgs {
-    maker: string;
-    feeRecipient: string;
-    makerToken: string;
-    takerToken: string;
-    cancelledMakerTokenAmount: BigNumber;
-    cancelledTakerTokenAmount: BigNumber;
-    tokens: string;
-    orderHash: string;
-}
-export interface LogErrorContractEventArgs {
-    errorId: BigNumber;
-    orderHash: string;
-}
-export type ExchangeContractEventArgs = LogFillContractEventArgs|LogCancelContractEventArgs|LogErrorContractEventArgs;
-export interface TransferContractEventArgs {
-    _from: string;
-    _to: string;
-    _value: BigNumber;
-}
-export interface ApprovalContractEventArgs {
-    _owner: string;
-    _spender: string;
-    _value: BigNumber;
-}
-export type TokenContractEventArgs = TransferContractEventArgs|ApprovalContractEventArgs;
-export type ContractEventArgs = ExchangeContractEventArgs|TokenContractEventArgs;
-export type ContractEventArg = string|BigNumber;
-
-export interface Order {
-    maker: string;
-    taker: string;
-    makerFee: BigNumber;
-    takerFee: BigNumber;
-    makerTokenAmount: BigNumber;
-    takerTokenAmount: BigNumber;
-    makerTokenAddress: string;
-    takerTokenAddress: string;
-    salt: BigNumber;
-    exchangeContractAddress: string;
-    feeRecipient: string;
-    expirationUnixTimestampSec: BigNumber;
-}
-
-export interface SignedOrder extends Order {
-    ecSignature: ECSignature;
-}
-
-//                          [address, name, symbol, decimals, ipfsHash, swarmHash]
-export type TokenMetadata = [string, string, string, BigNumber, string, string];
-
-export interface Token {
-    name: string;
-    address: string;
-    symbol: string;
-    decimals: number;
-}
-
-export interface TxOpts {
-    from: string;
-    gas?: number;
-    value?: BigNumber;
-}
-
-export interface TokenAddressBySymbol {
-    [symbol: string]: string;
-}
-
-export enum ExchangeEvents {
-    LogFill = 'LogFill',
-    LogCancel = 'LogCancel',
-    LogError = 'LogError',
-}
-
-export enum TokenEvents {
-    Transfer = 'Transfer',
-    Approval = 'Approval',
-}
-
-export type ContractEvents = TokenEvents|ExchangeEvents;
-
-export interface IndexedFilterValues {
-    [index: string]: ContractEventArg;
-}
-
-export enum BlockParamLiteral {
-    Latest = 'latest',
-    Earliest = 'earliest',
-    Pending = 'pending',
-}
-
-export type BlockParam = BlockParamLiteral|number;
-
-export interface SubscriptionOpts {
-    fromBlock: BlockParam;
-    toBlock: BlockParam;
-}
-
-export type DoneCallback = (err?: Error) => void;
-
-export interface OrderCancellationRequest {
-    order: Order|SignedOrder;
-    takerTokenCancelAmount: BigNumber;
-}
-
-export interface OrderFillRequest {
-    signedOrder: SignedOrder;
-    takerTokenFillAmount: BigNumber;
-}
-
-export type AsyncMethod = (...args: any[]) => Promise<any>;
-
-/**
- * We re-export the `Web3.Provider` type specified in the Web3 Typescript typings
- * since it is the type of the `provider` argument to the `ZeroEx` constructor.
- * It is however a `Web3` library type, not a native `0x.js` type.
- */
-export type Web3Provider = Web3.Provider;
-
-export interface ExchangeContractByAddress {
-    [address: string]: ExchangeContract;
-}
-
-export interface JSONRPCPayload {
-    params: any[];
-    method: string;
-}
-
-/*
- * eventPollingIntervalMs: How often to poll the Ethereum node for new events
- */
-export interface OrderStateWatcherConfig {
-    eventPollingIntervalMs?: number;
-}
-
-/*
- * gasPrice: Gas price to use with every transaction
- * exchangeContractAddress: The address of an exchange contract to use
- * tokenRegistryContractAddress: The address of a token registry contract to use
- * etherTokenContractAddress: The address of an ether token contract to use
- * orderWatcherConfig: All the configs related to the orderWatcher
- */
-export interface ZeroExConfig {
-    gasPrice?: BigNumber; // Gas price to use with every transaction
-    exchangeContractAddress?: string;
-    tokenRegistryContractAddress?: string;
-    etherTokenContractAddress?: string;
-    orderWatcherConfig?: OrderStateWatcherConfig;
-}
-
-export enum AbiType {
-    Function = 'function',
-    Constructor = 'constructor',
-    Event = 'event',
-    Fallback = 'fallback',
-}
-
-export interface DecodedLogArgs {
-    [argName: string]: ContractEventArg;
-}
-
-export interface LogWithDecodedArgs<ArgsType> extends Web3.DecodedLogEntry<ArgsType> {}
-
-export interface TransactionReceiptWithDecodedLogs extends TransactionReceipt {
-    logs: Array<LogWithDecodedArgs<DecodedLogArgs>|Web3.LogEntry>;
-}
-
-export interface Artifact {
-    abi: any;
-    networks: {[networkId: number]: {
-        address: string;
-    }};
-}
-
-/*
- * expectedFillTakerTokenAmount: If specified, the validation method will ensure that the
- * supplied order maker has a sufficient allowance/balance to fill this amount of the order's
- * takerTokenAmount. If not specified, the validation method ensures that the maker has a sufficient
- * allowance/balance to fill the entire remaining order amount.
- */
-export interface ValidateOrderFillableOpts {
-    expectedFillTakerTokenAmount?: BigNumber;
-}
-
-/*
- * defaultBlock: The block up to which to query the blockchain state. Setting this to a historical block number
- * let's the user query the blockchain's state at an arbitrary point in time. In order for this to work, the
- * backing  Ethereum node must keep the entire historical state of the chain (e.g setting `--pruning=archive`
- * flag when  running Parity).
- */
-export interface MethodOpts {
-    defaultBlock?: Web3.BlockParam;
-}
-
-/*
- * shouldValidate: Flag indicating whether the library should make attempts to validate a transaction before
- * broadcasting it. For example, order has a valid signature, maker has sufficient funds, etc.
- */
-export interface OrderTransactionOpts {
-    shouldValidate: boolean;
-}
-
-export type FilterObject = Web3.FilterObject;
-
-export enum TradeSide {
-    Maker = 'maker',
-    Taker = 'taker',
-}
-
-export enum TransferType {
-    Trade = 'trade',
-    Fee = 'fee',
-}
-
-export interface OrderRelevantState {
-    makerBalance: BigNumber;
-    makerProxyAllowance: BigNumber;
-    makerFeeBalance: BigNumber;
-    makerFeeProxyAllowance: BigNumber;
-    filledTakerTokenAmount: BigNumber;
-    canceledTakerTokenAmount: BigNumber;
-    remainingFillableMakerTokenAmount: BigNumber;
-}
-
-export interface OrderStateValid {
-    isValid: true;
-    orderHash: string;
-    orderRelevantState: OrderRelevantState;
-}
-
-export interface OrderStateInvalid {
-    isValid: false;
-    orderHash: string;
-    error: ExchangeContractErrs;
-}
-
-export type OrderState = OrderStateValid|OrderStateInvalid;
-
-export type OnOrderStateChangeCallbackSync = (orderState: OrderState) => void;
-export type OnOrderStateChangeCallbackAsync = (orderState: OrderState) => Promise<void>;
-export type OnOrderStateChangeCallback = OnOrderStateChangeCallbackAsync|OnOrderStateChangeCallbackSync;
-
-export interface TransactionReceipt {
-    blockHash: string;
-    blockNumber: number;
-    transactionHash: string;
-    transactionIndex: number;
-    from: string;
-    to: string;
-    status: null|0|1;
-    cumulativeGasUsed: number;
-    gasUsed: number;
-    contractAddress: string|null;
-    logs: Web3.LogEntry[];
-}
diff --git a/src/utils/abi_decoder.ts b/src/utils/abi_decoder.ts
deleted file mode 100644
index 840ad9be0..000000000
--- a/src/utils/abi_decoder.ts
+++ /dev/null
@@ -1,68 +0,0 @@
-import * as Web3 from 'web3';
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {AbiType, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes, ContractEventArgs} from '../types';
-import * as SolidityCoder from 'web3/lib/solidity/coder';
-
-export class AbiDecoder {
-    private savedABIs: Web3.AbiDefinition[] = [];
-    private methodIds: {[signatureHash: string]: Web3.EventAbi} = {};
-    constructor(abiArrays: Web3.AbiDefinition[][]) {
-        _.map(abiArrays, this.addABI.bind(this));
-    }
-    // This method can only decode logs from the 0x & ERC20 smart contracts
-    public tryToDecodeLogOrNoop<ArgsType extends ContractEventArgs>(
-        log: Web3.LogEntry): LogWithDecodedArgs<ArgsType>|RawLog {
-        const methodId = log.topics[0];
-        const event = this.methodIds[methodId];
-        if (_.isUndefined(event)) {
-            return log;
-        }
-        const logData = log.data;
-        const decodedParams: DecodedLogArgs = {};
-        let dataIndex = 0;
-        let topicsIndex = 1;
-
-        const nonIndexedInputs = _.filter(event.inputs, input => !input.indexed);
-        const dataTypes = _.map(nonIndexedInputs, input => input.type);
-        const decodedData = SolidityCoder.decodeParams(dataTypes, logData.slice('0x'.length));
-
-        _.map(event.inputs, (param: Web3.EventParameter) => {
-            // Indexed parameters are stored in topics. Non-indexed ones in decodedData
-            let value = param.indexed ? log.topics[topicsIndex++] : decodedData[dataIndex++];
-            if (param.type === SolidityTypes.Address) {
-                value = this.padZeros(new BigNumber(value).toString(16));
-            } else if (param.type === SolidityTypes.Uint256 ||
-                       param.type === SolidityTypes.Uint8 ||
-                       param.type === SolidityTypes.Uint ) {
-                value = new BigNumber(value);
-            }
-            decodedParams[param.name] = value;
-        });
-
-        return {
-            ...log,
-            event: event.name,
-            args: decodedParams,
-        };
-    }
-    private addABI(abiArray: Web3.AbiDefinition[]): void {
-        _.map(abiArray, (abi: Web3.AbiDefinition) => {
-            if (abi.type === AbiType.Event) {
-                const signature = `${abi.name}(${_.map(abi.inputs, input => input.type).join(',')})`;
-                const signatureHash = new Web3().sha3(signature);
-                this.methodIds[signatureHash] = abi;
-            }
-        });
-        this.savedABIs = this.savedABIs.concat(abiArray);
-    }
-    private padZeros(address: string) {
-        let formatted = address;
-        if (_.startsWith(formatted, '0x')) {
-            formatted = formatted.slice(2);
-        }
-
-        formatted = _.padStart(formatted, 40, '0');
-        return `0x${formatted}`;
-    }
-}
diff --git a/src/utils/assert.ts b/src/utils/assert.ts
deleted file mode 100644
index e5c9439f3..000000000
--- a/src/utils/assert.ts
+++ /dev/null
@@ -1,101 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import BigNumber from 'bignumber.js';
-import {SchemaValidator, Schema} from '0x-json-schemas';
-import {Web3Wrapper} from '../web3_wrapper';
-import {signatureUtils} from '../utils/signature_utils';
-import {ECSignature} from '../types';
-
-const HEX_REGEX = /^0x[0-9A-F]*$/i;
-
-export const assert = {
-    isBigNumber(variableName: string, value: BigNumber): void {
-        const isBigNumber = _.isObject(value) && (value as any).isBigNumber;
-        this.assert(isBigNumber, this.typeAssertionMessage(variableName, 'BigNumber', value));
-    },
-    isValidBaseUnitAmount(variableName: string, value: BigNumber) {
-        assert.isBigNumber(variableName, value);
-        const hasDecimals = value.decimalPlaces() !== 0;
-        this.assert(
-            !hasDecimals, `${variableName} should be in baseUnits (no decimals), found value: ${value.toNumber()}`,
-        );
-    },
-    isValidSignature(orderHash: string, ecSignature: ECSignature, signerAddress: string) {
-        const isValidSignature = signatureUtils.isValidSignature(orderHash, ecSignature, signerAddress);
-        this.assert(isValidSignature, `Expected order with hash '${orderHash}' to have a valid signature`);
-    },
-    isUndefined(value: any, variableName?: string): void {
-        this.assert(_.isUndefined(value), this.typeAssertionMessage(variableName, 'undefined', value));
-    },
-    isString(variableName: string, value: string): void {
-        this.assert(_.isString(value), this.typeAssertionMessage(variableName, 'string', value));
-    },
-    isFunction(variableName: string, value: any): void {
-        this.assert(_.isFunction(value), this.typeAssertionMessage(variableName, 'function', value));
-    },
-    isHexString(variableName: string, value: string): void {
-        this.assert(_.isString(value) && HEX_REGEX.test(value),
-            this.typeAssertionMessage(variableName, 'HexString', value));
-    },
-    isETHAddressHex(variableName: string, value: string): void {
-        const web3 = new Web3();
-        this.assert(web3.isAddress(value), this.typeAssertionMessage(variableName, 'ETHAddressHex', value));
-        this.assert(
-            web3.isAddress(value) && value.toLowerCase() === value,
-            `Checksummed addresses are not supported. Convert ${variableName} to lower case before passing`,
-        );
-    },
-    doesBelongToStringEnum(variableName: string, value: string,
-                           stringEnum: any /* There is no base type for every string enum */): void {
-        const doesBelongToStringEnum = !_.isUndefined(stringEnum[value]);
-        const enumValues = _.keys(stringEnum);
-        const enumValuesAsStrings = _.map(enumValues, enumValue => `'${enumValue}'`);
-        const enumValuesAsString = enumValuesAsStrings.join(', ');
-        assert.assert(
-            doesBelongToStringEnum,
-            `Expected ${variableName} to be one of: ${enumValuesAsString}, encountered: ${value}`,
-        );
-    },
-    async isSenderAddressAsync(variableName: string, senderAddressHex: string,
-                               web3Wrapper: Web3Wrapper): Promise<void> {
-        assert.isETHAddressHex(variableName, senderAddressHex);
-        const isSenderAddressAvailable = await web3Wrapper.isSenderAddressAvailableAsync(senderAddressHex);
-        assert.assert(isSenderAddressAvailable,
-            `Specified ${variableName} ${senderAddressHex} isn't available through the supplied web3 provider`,
-        );
-    },
-    async isUserAddressAvailableAsync(web3Wrapper: Web3Wrapper): Promise<void> {
-        const availableAddresses = await web3Wrapper.getAvailableAddressesAsync();
-        this.assert(!_.isEmpty(availableAddresses), 'No addresses were available on the provided web3 provider');
-    },
-    hasAtMostOneUniqueValue(value: any[], errMsg: string): void {
-        this.assert(_.uniq(value).length <= 1, errMsg);
-    },
-    isNumber(variableName: string, value: number): void {
-        this.assert(_.isFinite(value), this.typeAssertionMessage(variableName, 'number', value));
-    },
-    isBoolean(variableName: string, value: boolean): void {
-        this.assert(_.isBoolean(value), this.typeAssertionMessage(variableName, 'boolean', value));
-    },
-    isWeb3Provider(variableName: string, value: Web3.Provider): void {
-        const isWeb3Provider = _.isFunction((value as any).send) || _.isFunction((value as any).sendAsync);
-        this.assert(isWeb3Provider, this.typeAssertionMessage(variableName, 'Web3.Provider', value));
-    },
-    doesConformToSchema(variableName: string, value: any, schema: Schema): void {
-        const schemaValidator = new SchemaValidator();
-        const validationResult = schemaValidator.validate(value, schema);
-        const hasValidationErrors = validationResult.errors.length > 0;
-        const msg = `Expected ${variableName} to conform to schema ${schema.id}
-Encountered: ${JSON.stringify(value, null, '\t')}
-Validation errors: ${validationResult.errors.join(', ')}`;
-        this.assert(!hasValidationErrors, msg);
-    },
-    assert(condition: boolean, message: string): void {
-        if (!condition) {
-            throw new Error(message);
-        }
-    },
-    typeAssertionMessage(variableName: string, type: string, value: any): string {
-        return `Expected ${variableName} to be of type ${type}, encountered: ${value}`;
-    },
-};
diff --git a/src/utils/constants.ts b/src/utils/constants.ts
deleted file mode 100644
index 3de3f5bc1..000000000
--- a/src/utils/constants.ts
+++ /dev/null
@@ -1,11 +0,0 @@
-import BigNumber from 'bignumber.js';
-
-export const constants = {
-    NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
-    TESTRPC_NETWORK_ID: 50,
-    MAX_DIGITS_IN_UNSIGNED_256_INT: 78,
-    INVALID_JUMP_PATTERN: 'invalid JUMP at',
-    OUT_OF_GAS_PATTERN: 'out of gas',
-    UNLIMITED_ALLOWANCE_IN_BASE_UNITS: new BigNumber(2).pow(256).minus(1),
-    DEFAULT_BLOCK_POLLING_INTERVAL: 1000,
-};
diff --git a/src/utils/decorators.ts b/src/utils/decorators.ts
deleted file mode 100644
index ec750b891..000000000
--- a/src/utils/decorators.ts
+++ /dev/null
@@ -1,35 +0,0 @@
-import * as _ from 'lodash';
-import {constants} from './constants';
-import {AsyncMethod, ZeroExError} from '../types';
-
-export const decorators = {
-    /**
-     * Source: https://stackoverflow.com/a/29837695/3546986
-     */
-    contractCallErrorHandler(target: object,
-                             key: string|symbol,
-                             descriptor: TypedPropertyDescriptor<AsyncMethod>,
-    ): TypedPropertyDescriptor<AsyncMethod> {
-        const originalMethod = (descriptor.value as AsyncMethod);
-
-        // Do not use arrow syntax here. Use a function expression in
-        // order to use the correct value of `this` in this method
-        // tslint:disable-next-line:only-arrow-functions
-        descriptor.value =  async function(...args: any[]) {
-            try {
-                const result = await originalMethod.apply(this, args);
-                return result;
-            } catch (error) {
-                if (_.includes(error.message, constants.INVALID_JUMP_PATTERN)) {
-                    throw new Error(ZeroExError.InvalidJump);
-                }
-                if (_.includes(error.message, constants.OUT_OF_GAS_PATTERN)) {
-                    throw new Error(ZeroExError.OutOfGas);
-                }
-                throw error;
-            }
-        };
-
-        return descriptor;
-    },
-};
diff --git a/src/utils/exchange_transfer_simulator.ts b/src/utils/exchange_transfer_simulator.ts
deleted file mode 100644
index 308ef06db..000000000
--- a/src/utils/exchange_transfer_simulator.ts
+++ /dev/null
@@ -1,88 +0,0 @@
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {ExchangeContractErrs, TradeSide, TransferType, BlockParamLiteral} from '../types';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-
-enum FailureReason {
-    Balance = 'balance',
-    ProxyAllowance = 'proxyAllowance',
-}
-
-const ERR_MSG_MAPPING = {
-    [FailureReason.Balance]: {
-        [TradeSide.Maker]: {
-            [TransferType.Trade]: ExchangeContractErrs.InsufficientMakerBalance,
-            [TransferType.Fee]: ExchangeContractErrs.InsufficientMakerFeeBalance,
-        },
-        [TradeSide.Taker]: {
-            [TransferType.Trade]: ExchangeContractErrs.InsufficientTakerBalance,
-            [TransferType.Fee]: ExchangeContractErrs.InsufficientTakerFeeBalance,
-        },
-    },
-    [FailureReason.ProxyAllowance]: {
-        [TradeSide.Maker]: {
-            [TransferType.Trade]: ExchangeContractErrs.InsufficientMakerAllowance,
-            [TransferType.Fee]: ExchangeContractErrs.InsufficientMakerFeeAllowance,
-        },
-        [TradeSide.Taker]: {
-            [TransferType.Trade]: ExchangeContractErrs.InsufficientTakerAllowance,
-            [TransferType.Fee]: ExchangeContractErrs.InsufficientTakerFeeAllowance,
-        },
-    },
-};
-
-export class ExchangeTransferSimulator {
-    private store: BalanceAndProxyAllowanceLazyStore;
-    private UNLIMITED_ALLOWANCE_IN_BASE_UNITS: BigNumber;
-    constructor(token: TokenWrapper) {
-        this.store = new BalanceAndProxyAllowanceLazyStore(token);
-        this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS = token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
-    }
-    /**
-     * Simulates transferFrom call performed by a proxy
-     * @param  tokenAddress      Address of the token to be transferred
-     * @param  from              Owner of the transferred tokens
-     * @param  to                Recipient of the transferred tokens
-     * @param  amountInBaseUnits The amount of tokens being transferred
-     * @param  tradeSide         Is Maker/Taker transferring
-     * @param  transferType      Is it a fee payment or a value transfer
-     */
-    public async transferFromAsync(tokenAddress: string, from: string, to: string,
-                                   amountInBaseUnits: BigNumber, tradeSide: TradeSide,
-                                   transferType: TransferType): Promise<void> {
-        const balance = await this.store.getBalanceAsync(tokenAddress, from);
-        const proxyAllowance = await this.store.getProxyAllowanceAsync(tokenAddress, from);
-        if (proxyAllowance.lessThan(amountInBaseUnits)) {
-            this.throwValidationError(FailureReason.ProxyAllowance, tradeSide, transferType);
-        }
-        if (balance.lessThan(amountInBaseUnits)) {
-            this.throwValidationError(FailureReason.Balance, tradeSide, transferType);
-        }
-        await this.decreaseProxyAllowanceAsync(tokenAddress, from, amountInBaseUnits);
-        await this.decreaseBalanceAsync(tokenAddress, from, amountInBaseUnits);
-        await this.increaseBalanceAsync(tokenAddress, to, amountInBaseUnits);
-    }
-    private async decreaseProxyAllowanceAsync(tokenAddress: string, userAddress: string,
-                                              amountInBaseUnits: BigNumber): Promise<void> {
-        const proxyAllowance = await this.store.getProxyAllowanceAsync(tokenAddress, userAddress);
-        if (!proxyAllowance.eq(this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS)) {
-            this.store.setProxyAllowance(tokenAddress, userAddress, proxyAllowance.minus(amountInBaseUnits));
-        }
-    }
-    private async increaseBalanceAsync(tokenAddress: string, userAddress: string,
-                                       amountInBaseUnits: BigNumber): Promise<void> {
-        const balance = await this.store.getBalanceAsync(tokenAddress, userAddress);
-        this.store.setBalance(tokenAddress, userAddress, balance.plus(amountInBaseUnits));
-    }
-    private async decreaseBalanceAsync(tokenAddress: string, userAddress: string,
-                                       amountInBaseUnits: BigNumber): Promise<void> {
-        const balance = await this.store.getBalanceAsync(tokenAddress, userAddress);
-        this.store.setBalance(tokenAddress, userAddress, balance.minus(amountInBaseUnits));
-    }
-    private throwValidationError(failureReason: FailureReason, tradeSide: TradeSide,
-                                 transferType: TransferType): Promise<never> {
-        const errMsg = ERR_MSG_MAPPING[failureReason][tradeSide][transferType];
-        throw new Error(errMsg);
-    }
-}
diff --git a/src/utils/filter_utils.ts b/src/utils/filter_utils.ts
deleted file mode 100644
index e09a95a6e..000000000
--- a/src/utils/filter_utils.ts
+++ /dev/null
@@ -1,82 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import * as uuid from 'uuid/v4';
-import * as ethUtil from 'ethereumjs-util';
-import * as jsSHA3 from 'js-sha3';
-import {ContractEvents, IndexedFilterValues, SubscriptionOpts} from '../types';
-
-const TOPIC_LENGTH = 32;
-
-export const filterUtils = {
-    generateUUID(): string {
-        return uuid();
-    },
-    getFilter(address: string, eventName: ContractEvents,
-              indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi,
-              subscriptionOpts?: SubscriptionOpts): Web3.FilterObject {
-        const eventAbi = _.find(abi, {name: eventName}) as Web3.EventAbi;
-        const eventSignature = filterUtils.getEventSignatureFromAbiByName(eventAbi, eventName);
-        const topicForEventSignature = ethUtil.addHexPrefix(jsSHA3.keccak256(eventSignature));
-        const topicsForIndexedArgs = filterUtils.getTopicsForIndexedArgs(eventAbi, indexFilterValues);
-        const topics = [topicForEventSignature, ...topicsForIndexedArgs];
-        let filter: Web3.FilterObject = {
-            address,
-            topics,
-        };
-        if (!_.isUndefined(subscriptionOpts)) {
-            filter = {
-                ...subscriptionOpts,
-                ...filter,
-            };
-        }
-        return filter;
-    },
-    getEventSignatureFromAbiByName(eventAbi: Web3.EventAbi, eventName: ContractEvents): string {
-        const types = _.map(eventAbi.inputs, 'type');
-        const signature = `${eventAbi.name}(${types.join(',')})`;
-        return signature;
-    },
-    getTopicsForIndexedArgs(abi: Web3.EventAbi, indexFilterValues: IndexedFilterValues): Array<string|null> {
-        const topics: Array<string|null> = [];
-        for (const eventInput of abi.inputs) {
-            if (!eventInput.indexed) {
-                continue;
-            }
-            if (_.isUndefined(indexFilterValues[eventInput.name])) {
-                // Null is a wildcard topic in a JSON-RPC call
-                topics.push(null);
-            } else {
-                const value = indexFilterValues[eventInput.name] as string;
-                const buffer = ethUtil.toBuffer(value);
-                const paddedBuffer = ethUtil.setLengthLeft(buffer, TOPIC_LENGTH);
-                const topic = ethUtil.bufferToHex(paddedBuffer);
-                topics.push(topic);
-            }
-        }
-        return topics;
-    },
-    matchesFilter(log: Web3.LogEntry, filter: Web3.FilterObject): boolean {
-        if (!_.isUndefined(filter.address) && log.address !== filter.address) {
-            return false;
-        }
-        if (!_.isUndefined(filter.topics)) {
-            return filterUtils.matchesTopics(log.topics, filter.topics);
-        }
-        return true;
-    },
-    matchesTopics(logTopics: string[], filterTopics: Array<string[]|string|null>): boolean {
-        const matchesTopic = _.zipWith(logTopics, filterTopics, filterUtils.matchesTopic.bind(filterUtils));
-        const matchesTopics = _.every(matchesTopic);
-        return matchesTopics;
-    },
-    matchesTopic(logTopic: string, filterTopic: string[]|string|null): boolean {
-        if (_.isArray(filterTopic)) {
-            return _.includes(filterTopic, logTopic);
-        }
-        if (_.isString(filterTopic)) {
-            return filterTopic === logTopic;
-        }
-        // null topic is a wildcard
-        return true;
-    },
-};
diff --git a/src/utils/interval_utils.ts b/src/utils/interval_utils.ts
deleted file mode 100644
index 62b79f2f5..000000000
--- a/src/utils/interval_utils.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-import * as _ from 'lodash';
-
-export const intervalUtils = {
-    setAsyncExcludingInterval(fn: () => Promise<void>, intervalMs: number) {
-        let locked = false;
-        const intervalId = setInterval(async () => {
-            if (locked) {
-                return;
-            } else {
-                locked = true;
-                await fn();
-                locked = false;
-            }
-        }, intervalMs);
-        return intervalId;
-    },
-    clearAsyncExcludingInterval(intervalId: NodeJS.Timer): void {
-        clearInterval(intervalId);
-    },
-};
diff --git a/src/utils/order_state_utils.ts b/src/utils/order_state_utils.ts
deleted file mode 100644
index f82601cae..000000000
--- a/src/utils/order_state_utils.ts
+++ /dev/null
@@ -1,119 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import BigNumber from 'bignumber.js';
-import {
-    ExchangeContractErrs,
-    SignedOrder,
-    OrderRelevantState,
-    MethodOpts,
-    OrderState,
-    OrderStateValid,
-    OrderStateInvalid,
-} from '../types';
-import {ZeroEx} from '../0x';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {utils} from '../utils/utils';
-import {constants} from '../utils/constants';
-import {OrderFilledCancelledLazyStore} from '../stores/order_filled_cancelled_lazy_store';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-
-export class OrderStateUtils {
-    private balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore;
-    private orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore;
-    constructor(balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore,
-                orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore) {
-        this.balanceAndProxyAllowanceLazyStore = balanceAndProxyAllowanceLazyStore;
-        this.orderFilledCancelledLazyStore = orderFilledCancelledLazyStore;
-    }
-    public async getOrderStateAsync(signedOrder: SignedOrder): Promise<OrderState> {
-        const orderRelevantState = await this.getOrderRelevantStateAsync(signedOrder);
-        const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-        try {
-            this.validateIfOrderIsValid(signedOrder, orderRelevantState);
-            const orderState: OrderStateValid = {
-                isValid: true,
-                orderHash,
-                orderRelevantState,
-            };
-            return orderState;
-        } catch (err) {
-            const orderState: OrderStateInvalid = {
-                isValid: false,
-                orderHash,
-                error: err.message,
-            };
-            return orderState;
-        }
-    }
-    public async getOrderRelevantStateAsync(signedOrder: SignedOrder): Promise<OrderRelevantState> {
-        // HACK: We access the private property here but otherwise the interface will be less nice.
-        // If we pass it from the instantiator - there is no opportunity to get it there
-        // because JS doesn't support async constructors.
-        // Moreover - it's cached under the hood so it's equivalent to an async constructor.
-        const exchange = (this.orderFilledCancelledLazyStore as any).exchange as ExchangeWrapper;
-        const zrxTokenAddress = await exchange.getZRXTokenAddressAsync();
-        const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-        const makerBalance = await this.balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker,
-        );
-        const makerProxyAllowance = await this.balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker,
-        );
-        const makerFeeBalance = await this.balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            zrxTokenAddress, signedOrder.maker,
-        );
-        const makerFeeProxyAllowance = await this.balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            zrxTokenAddress, signedOrder.maker,
-        );
-        const filledTakerTokenAmount = await this.orderFilledCancelledLazyStore.getFilledTakerAmountAsync(orderHash);
-        const canceledTakerTokenAmount = await this.orderFilledCancelledLazyStore.getCancelledTakerAmountAsync(
-            orderHash,
-        );
-        const unavailableTakerTokenAmount = await exchange.getUnavailableTakerAmountAsync(orderHash);
-        const totalMakerTokenAmount = signedOrder.makerTokenAmount;
-        const totalTakerTokenAmount = signedOrder.takerTokenAmount;
-        const remainingTakerTokenAmount = totalTakerTokenAmount.minus(unavailableTakerTokenAmount);
-        const remainingMakerTokenAmount = remainingTakerTokenAmount.times(totalMakerTokenAmount)
-                                                                   .dividedToIntegerBy(totalTakerTokenAmount);
-        const fillableMakerTokenAmount = BigNumber.min([makerProxyAllowance, makerBalance]);
-        const remainingFillableMakerTokenAmount = BigNumber.min(fillableMakerTokenAmount, remainingMakerTokenAmount);
-        // TODO: Handle edge case where maker token is ZRX with fee
-        const orderRelevantState = {
-            makerBalance,
-            makerProxyAllowance,
-            makerFeeBalance,
-            makerFeeProxyAllowance,
-            filledTakerTokenAmount,
-            canceledTakerTokenAmount,
-            remainingFillableMakerTokenAmount,
-        };
-        return orderRelevantState;
-    }
-    private validateIfOrderIsValid(signedOrder: SignedOrder, orderRelevantState: OrderRelevantState): void {
-        const unavailableTakerTokenAmount = orderRelevantState.canceledTakerTokenAmount.add(
-            orderRelevantState.filledTakerTokenAmount,
-        );
-        const availableTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
-        if (availableTakerTokenAmount.eq(0)) {
-            throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero);
-        }
-
-        if (orderRelevantState.makerBalance.eq(0)) {
-            throw new Error(ExchangeContractErrs.InsufficientMakerBalance);
-        }
-        if (orderRelevantState.makerProxyAllowance.eq(0)) {
-            throw new Error(ExchangeContractErrs.InsufficientMakerAllowance);
-        }
-        if (!signedOrder.makerFee.eq(0)) {
-            if (orderRelevantState.makerFeeBalance.eq(0)) {
-                throw new Error(ExchangeContractErrs.InsufficientMakerFeeBalance);
-            }
-            if (orderRelevantState.makerFeeProxyAllowance.eq(0)) {
-                throw new Error(ExchangeContractErrs.InsufficientMakerFeeAllowance);
-            }
-        }
-        // TODO Add linear function solver when maker token is ZRX #badass
-        // Return the max amount that's fillable
-    }
-}
diff --git a/src/utils/order_validation_utils.ts b/src/utils/order_validation_utils.ts
deleted file mode 100644
index f03703c4e..000000000
--- a/src/utils/order_validation_utils.ts
+++ /dev/null
@@ -1,166 +0,0 @@
-import * as _ from 'lodash';
-import BigNumber from 'bignumber.js';
-import {ExchangeContractErrs, SignedOrder, Order, ZeroExError, TradeSide, TransferType} from '../types';
-import {ZeroEx} from '../0x';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {utils} from '../utils/utils';
-import {constants} from '../utils/constants';
-import {ExchangeTransferSimulator} from './exchange_transfer_simulator';
-
-export class OrderValidationUtils {
-    private tokenWrapper: TokenWrapper;
-    private exchangeWrapper: ExchangeWrapper;
-    constructor(tokenWrapper: TokenWrapper, exchangeWrapper: ExchangeWrapper) {
-        this.tokenWrapper = tokenWrapper;
-        this.exchangeWrapper = exchangeWrapper;
-    }
-    public async validateOrderFillableOrThrowAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder, zrxTokenAddress: string,
-        expectedFillTakerTokenAmount?: BigNumber): Promise<void> {
-        const orderHash = utils.getOrderHashHex(signedOrder);
-        const unavailableTakerTokenAmount = await this.exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
-        this.validateRemainingFillAmountNotZeroOrThrow(
-            signedOrder.takerTokenAmount, unavailableTakerTokenAmount,
-        );
-        this.validateOrderNotExpiredOrThrow(signedOrder.expirationUnixTimestampSec);
-        let fillTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
-        if (!_.isUndefined(expectedFillTakerTokenAmount)) {
-            fillTakerTokenAmount = expectedFillTakerTokenAmount;
-        }
-        const fillMakerTokenAmount = this.getPartialAmount(
-            fillTakerTokenAmount,
-            signedOrder.takerTokenAmount,
-            signedOrder.makerTokenAmount,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker, signedOrder.taker, fillMakerTokenAmount,
-            TradeSide.Maker, TransferType.Trade,
-        );
-        const makerFeeAmount = this.getPartialAmount(
-            fillTakerTokenAmount,
-            signedOrder.takerTokenAmount,
-            signedOrder.makerFee,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, signedOrder.maker, signedOrder.feeRecipient, makerFeeAmount,
-            TradeSide.Maker, TransferType.Fee,
-        );
-    }
-    public async validateFillOrderThrowIfInvalidAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder,
-        fillTakerTokenAmount: BigNumber, takerAddress: string,
-        zrxTokenAddress: string): Promise<BigNumber> {
-        if (fillTakerTokenAmount.eq(0)) {
-            throw new Error(ExchangeContractErrs.OrderFillAmountZero);
-        }
-        const orderHash = utils.getOrderHashHex(signedOrder);
-        if (!ZeroEx.isValidSignature(orderHash, signedOrder.ecSignature, signedOrder.maker)) {
-            throw new Error(ZeroExError.InvalidSignature);
-        }
-        const unavailableTakerTokenAmount = await this.exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
-        this.validateRemainingFillAmountNotZeroOrThrow(
-            signedOrder.takerTokenAmount, unavailableTakerTokenAmount,
-        );
-        if (signedOrder.taker !== constants.NULL_ADDRESS && signedOrder.taker !== takerAddress) {
-            throw new Error(ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker);
-        }
-        this.validateOrderNotExpiredOrThrow(signedOrder.expirationUnixTimestampSec);
-        const remainingTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
-        const filledTakerTokenAmount = remainingTakerTokenAmount.lessThan(fillTakerTokenAmount) ?
-                                       remainingTakerTokenAmount :
-                                       fillTakerTokenAmount;
-        await this.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, filledTakerTokenAmount, takerAddress, zrxTokenAddress,
-        );
-
-        const wouldRoundingErrorOccur = await this.exchangeWrapper.isRoundingErrorAsync(
-            filledTakerTokenAmount, signedOrder.takerTokenAmount, signedOrder.makerTokenAmount,
-        );
-        if (wouldRoundingErrorOccur) {
-            throw new Error(ExchangeContractErrs.OrderFillRoundingError);
-        }
-        return filledTakerTokenAmount;
-    }
-    public async validateFillOrKillOrderThrowIfInvalidAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder,
-        fillTakerTokenAmount: BigNumber, takerAddress: string, zrxTokenAddress: string): Promise<void> {
-        const filledTakerTokenAmount = await this.validateFillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress,
-        );
-        if (filledTakerTokenAmount !== fillTakerTokenAmount) {
-            throw new Error(ExchangeContractErrs.InsufficientRemainingFillAmount);
-        }
-    }
-    public async validateCancelOrderThrowIfInvalidAsync(order: Order,
-                                                        cancelTakerTokenAmount: BigNumber,
-                                                        unavailableTakerTokenAmount: BigNumber,
-    ): Promise<void> {
-        if (cancelTakerTokenAmount.eq(0)) {
-            throw new Error(ExchangeContractErrs.OrderCancelAmountZero);
-        }
-        if (order.takerTokenAmount.eq(unavailableTakerTokenAmount)) {
-            throw new Error(ExchangeContractErrs.OrderAlreadyCancelledOrFilled);
-        }
-        const currentUnixTimestampSec = utils.getCurrentUnixTimestamp();
-        if (order.expirationUnixTimestampSec.lessThan(currentUnixTimestampSec)) {
-            throw new Error(ExchangeContractErrs.OrderCancelExpired);
-        }
-    }
-    public async validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder,
-        fillTakerTokenAmount: BigNumber, senderAddress: string, zrxTokenAddress: string): Promise<void> {
-        const fillMakerTokenAmount = this.getPartialAmount(
-            fillTakerTokenAmount,
-            signedOrder.takerTokenAmount,
-            signedOrder.makerTokenAmount,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker, senderAddress, fillMakerTokenAmount,
-            TradeSide.Maker, TransferType.Trade,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.takerTokenAddress, senderAddress, signedOrder.maker, fillTakerTokenAmount,
-            TradeSide.Taker, TransferType.Trade,
-        );
-        const makerFeeAmount = this.getPartialAmount(
-            fillTakerTokenAmount,
-            signedOrder.takerTokenAmount,
-            signedOrder.makerFee,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, signedOrder.maker, signedOrder.feeRecipient, makerFeeAmount, TradeSide.Maker,
-            TransferType.Fee,
-        );
-        const takerFeeAmount = this.getPartialAmount(
-            fillTakerTokenAmount,
-            signedOrder.takerTokenAmount,
-            signedOrder.takerFee,
-        );
-        await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, senderAddress, signedOrder.feeRecipient, takerFeeAmount, TradeSide.Taker,
-            TransferType.Fee,
-        );
-    }
-    private validateRemainingFillAmountNotZeroOrThrow(
-        takerTokenAmount: BigNumber, unavailableTakerTokenAmount: BigNumber,
-    ) {
-        if (takerTokenAmount.eq(unavailableTakerTokenAmount)) {
-            throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero);
-        }
-    }
-    private validateOrderNotExpiredOrThrow(expirationUnixTimestampSec: BigNumber) {
-        const currentUnixTimestampSec = utils.getCurrentUnixTimestamp();
-        if (expirationUnixTimestampSec.lessThan(currentUnixTimestampSec)) {
-            throw new Error(ExchangeContractErrs.OrderFillExpired);
-        }
-    }
-    private getPartialAmount(numerator: BigNumber, denominator: BigNumber,
-                             target: BigNumber): BigNumber {
-        const fillMakerTokenAmount = numerator
-                                     .mul(target)
-                                     .div(denominator)
-                                     .round(0);
-        return fillMakerTokenAmount;
-    }
-}
diff --git a/src/utils/signature_utils.ts b/src/utils/signature_utils.ts
deleted file mode 100644
index d066f8bf0..000000000
--- a/src/utils/signature_utils.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import * as ethUtil from 'ethereumjs-util';
-import {ECSignature} from '../types';
-
-export const signatureUtils = {
-    isValidSignature(data: string, signature: ECSignature, signerAddress: string): boolean {
-        const dataBuff = ethUtil.toBuffer(data);
-        const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
-        try {
-            const pubKey = ethUtil.ecrecover(
-                msgHashBuff,
-                signature.v,
-                ethUtil.toBuffer(signature.r),
-                ethUtil.toBuffer(signature.s));
-            const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
-            return retrievedAddress === signerAddress;
-        } catch (err) {
-            return false;
-        }
-    },
-    parseSignatureHexAsVRS(signatureHex: string): ECSignature {
-        const signatureBuffer = ethUtil.toBuffer(signatureHex);
-        let v = signatureBuffer[0];
-        if (v < 27) {
-            v += 27;
-        }
-        const r = signatureBuffer.slice(1, 33);
-        const s = signatureBuffer.slice(33, 65);
-        const ecSignature: ECSignature = {
-            v,
-            r: ethUtil.bufferToHex(r),
-            s: ethUtil.bufferToHex(s),
-        };
-        return ecSignature;
-    },
-    parseSignatureHexAsRSV(signatureHex: string): ECSignature {
-        const {v, r, s} = ethUtil.fromRpcSig(signatureHex);
-        const ecSignature: ECSignature = {
-            v,
-            r: ethUtil.bufferToHex(r),
-            s: ethUtil.bufferToHex(s),
-        };
-        return ecSignature;
-    },
-};
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
deleted file mode 100644
index 280f3e979..000000000
--- a/src/utils/utils.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import * as _ from 'lodash';
-import * as ethABI from 'ethereumjs-abi';
-import * as ethUtil from 'ethereumjs-util';
-import {Order, SignedOrder, SolidityTypes} from '../types';
-import BigNumber from 'bignumber.js';
-import BN = require('bn.js');
-
-export const utils = {
-    /**
-     * Converts BigNumber instance to BN
-     * The only reason we convert to BN is to remain compatible with `ethABI. soliditySHA3` that
-     * expects values of Solidity type `uint` to be passed as type `BN`.
-     * We do not use BN anywhere else in the codebase.
-     */
-    bigNumberToBN(value: BigNumber) {
-        return new BN(value.toString(), 10);
-    },
-    consoleLog(message: string): void {
-        // tslint:disable-next-line: no-console
-        console.log(message);
-    },
-    isParityNode(nodeVersion: string): boolean {
-        return _.includes(nodeVersion, 'Parity');
-    },
-    isTestRpc(nodeVersion: string): boolean {
-        return _.includes(nodeVersion, 'TestRPC');
-    },
-    spawnSwitchErr(name: string, value: any): Error {
-        return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
-    },
-    getOrderHashHex(order: Order|SignedOrder): string {
-        const orderParts = [
-            {value: order.exchangeContractAddress, type: SolidityTypes.Address},
-            {value: order.maker, type: SolidityTypes.Address},
-            {value: order.taker, type: SolidityTypes.Address},
-            {value: order.makerTokenAddress, type: SolidityTypes.Address},
-            {value: order.takerTokenAddress, type: SolidityTypes.Address},
-            {value: order.feeRecipient, type: SolidityTypes.Address},
-            {value: utils.bigNumberToBN(order.makerTokenAmount), type: SolidityTypes.Uint256},
-            {value: utils.bigNumberToBN(order.takerTokenAmount), type: SolidityTypes.Uint256},
-            {value: utils.bigNumberToBN(order.makerFee), type: SolidityTypes.Uint256},
-            {value: utils.bigNumberToBN(order.takerFee), type: SolidityTypes.Uint256},
-            {value: utils.bigNumberToBN(order.expirationUnixTimestampSec), type: SolidityTypes.Uint256},
-            {value: utils.bigNumberToBN(order.salt), type: SolidityTypes.Uint256},
-        ];
-        const types = _.map(orderParts, o => o.type);
-        const values = _.map(orderParts, o => o.value);
-        const hashBuff = ethABI.soliditySHA3(types, values);
-        const hashHex = ethUtil.bufferToHex(hashBuff);
-        return hashHex;
-    },
-    getCurrentUnixTimestamp(): BigNumber {
-        return new BigNumber(Date.now() / 1000);
-    },
-};
diff --git a/src/web3_wrapper.ts b/src/web3_wrapper.ts
deleted file mode 100644
index c937f9288..000000000
--- a/src/web3_wrapper.ts
+++ /dev/null
@@ -1,172 +0,0 @@
-import * as _ from 'lodash';
-import * as Web3 from 'web3';
-import BigNumber from 'bignumber.js';
-import promisify = require('es6-promisify');
-import {ZeroExError, Artifact, TransactionReceipt} from './types';
-import {Contract} from './contract';
-
-export class Web3Wrapper {
-    private web3: Web3;
-    private defaults: Partial<Web3.TxData>;
-    private networkIdIfExists?: number;
-    private jsonRpcRequestId: number;
-    constructor(provider: Web3.Provider, defaults?: Partial<Web3.TxData>) {
-        if (_.isUndefined((provider as any).sendAsync)) {
-            // Web3@1.0 provider doesn't support synchronous http requests,
-            // so it only has an async `send` method, instead of a `send` and `sendAsync` in web3@0.x.x`
-            // We re-assign the send method so that Web3@1.0 providers work with 0x.js
-            (provider as any).sendAsync = (provider as any).send;
-        }
-        this.web3 = new Web3();
-        this.web3.setProvider(provider);
-        this.defaults = defaults || {};
-        this.jsonRpcRequestId = 0;
-    }
-    public setProvider(provider: Web3.Provider) {
-        delete this.networkIdIfExists;
-        this.web3.setProvider(provider);
-    }
-    public isAddress(address: string): boolean {
-        return this.web3.isAddress(address);
-    }
-    public async isSenderAddressAvailableAsync(senderAddress: string): Promise<boolean> {
-        const addresses = await this.getAvailableAddressesAsync();
-        return _.includes(addresses, senderAddress);
-    }
-    public async getNodeVersionAsync(): Promise<string> {
-        const nodeVersion = await promisify(this.web3.version.getNode)();
-        return nodeVersion;
-    }
-    public async getTransactionReceiptAsync(txHash: string): Promise<TransactionReceipt> {
-        const transactionReceipt = await promisify(this.web3.eth.getTransactionReceipt)(txHash);
-        transactionReceipt.status = this.normalizeTxReceiptStatus(transactionReceipt.status);
-        return transactionReceipt;
-    }
-    public getCurrentProvider(): Web3.Provider {
-        return this.web3.currentProvider;
-    }
-    public async getNetworkIdIfExistsAsync(): Promise<number|undefined> {
-        if (!_.isUndefined(this.networkIdIfExists)) {
-          return this.networkIdIfExists;
-        }
-
-        try {
-            const networkId = await this.getNetworkAsync();
-            this.networkIdIfExists = Number(networkId);
-            return this.networkIdIfExists;
-        } catch (err) {
-            return undefined;
-        }
-    }
-    public async getContractInstanceFromArtifactAsync<A extends Web3.ContractInstance>(artifact: Artifact,
-                                                                                       address?: string): Promise<A> {
-        let contractAddress: string;
-        if (_.isUndefined(address)) {
-            const networkIdIfExists = await this.getNetworkIdIfExistsAsync();
-            if (_.isUndefined(networkIdIfExists)) {
-                throw new Error(ZeroExError.NoNetworkId);
-            }
-            if (_.isUndefined(artifact.networks[networkIdIfExists])) {
-                throw new Error(ZeroExError.ContractNotDeployedOnNetwork);
-            }
-            contractAddress = artifact.networks[networkIdIfExists].address.toLowerCase();
-        } else {
-            contractAddress = address;
-        }
-        const doesContractExist = await this.doesContractExistAtAddressAsync(contractAddress);
-        if (!doesContractExist) {
-            throw new Error(ZeroExError.ContractDoesNotExist);
-        }
-        const contractInstance = this.getContractInstance<A>(
-            artifact.abi, contractAddress,
-        );
-        return contractInstance;
-    }
-    public toWei(ethAmount: BigNumber): BigNumber {
-        const balanceWei = this.web3.toWei(ethAmount, 'ether');
-        return balanceWei;
-    }
-    public async getBalanceInWeiAsync(owner: string): Promise<BigNumber> {
-        let balanceInWei = await promisify(this.web3.eth.getBalance)(owner);
-        balanceInWei = new BigNumber(balanceInWei);
-        return balanceInWei;
-    }
-    public async doesContractExistAtAddressAsync(address: string): Promise<boolean> {
-        const code = await promisify(this.web3.eth.getCode)(address);
-        // Regex matches 0x0, 0x00, 0x in order to accommodate poorly implemented clients
-        const codeIsEmpty = /^0x0{0,40}$/i.test(code);
-        return !codeIsEmpty;
-    }
-    public async signTransactionAsync(address: string, message: string): Promise<string> {
-        const signData = await promisify(this.web3.eth.sign)(address, message);
-        return signData;
-    }
-    public async getBlockNumberAsync(): Promise<number> {
-        const blockNumber = await promisify(this.web3.eth.getBlockNumber)();
-        return blockNumber;
-    }
-    public async getBlockAsync(blockParam: string|Web3.BlockParam): Promise<Web3.BlockWithoutTransactionData> {
-        const block = await promisify(this.web3.eth.getBlock)(blockParam);
-        return block;
-    }
-    public async getBlockTimestampAsync(blockParam: string|Web3.BlockParam): Promise<number> {
-        const {timestamp} = await this.getBlockAsync(blockParam);
-        return timestamp;
-    }
-    public async getAvailableAddressesAsync(): Promise<string[]> {
-        const addresses: string[] = await promisify(this.web3.eth.getAccounts)();
-        return addresses;
-    }
-    public async getLogsAsync(filter: Web3.FilterObject): Promise<Web3.LogEntry[]> {
-        let fromBlock = filter.fromBlock;
-        if (_.isNumber(fromBlock)) {
-            fromBlock = this.web3.toHex(fromBlock);
-        }
-        let toBlock = filter.toBlock;
-        if (_.isNumber(toBlock)) {
-            toBlock = this.web3.toHex(toBlock);
-        }
-        const serializedFilter = {
-            ...filter,
-            fromBlock,
-            toBlock,
-        };
-        const payload = {
-            jsonrpc: '2.0',
-            id: this.jsonRpcRequestId++,
-            method: 'eth_getLogs',
-            params: [serializedFilter],
-        };
-        const logs = await this.sendRawPayloadAsync(payload);
-        return logs;
-    }
-    private getContractInstance<A extends Web3.ContractInstance>(abi: Web3.ContractAbi, address: string): A {
-        const web3ContractInstance = this.web3.eth.contract(abi).at(address);
-        const contractInstance = new Contract(web3ContractInstance, this.defaults) as any as A;
-        return contractInstance;
-    }
-    private async getNetworkAsync(): Promise<number> {
-        const networkId = await promisify(this.web3.version.getNetwork)();
-        return networkId;
-    }
-    private async sendRawPayloadAsync(payload: Web3.JSONRPCRequestPayload): Promise<any> {
-        const sendAsync = this.web3.currentProvider.sendAsync.bind(this.web3.currentProvider);
-        const response = await promisify(sendAsync)(payload);
-        const result = response.result;
-        return result;
-    }
-    private normalizeTxReceiptStatus(status: undefined|null|string|0|1): null|0|1 {
-        // Transaction status might have four values
-        // undefined - Testrpc and other old clients
-        // null - New clients on old transactions
-        // number - Parity
-        // hex - Geth
-        if (_.isString(status)) {
-            return this.web3.toDecimal(status) as 0|1;
-        } else if (_.isUndefined(status)) {
-            return null;
-        } else {
-            return status;
-        }
-    }
-}