Merge branch 'development' into fix/mutatedInput

* development:
  Changes to abi-gen after code review
  Added constructor ABIs to abi-gen
  Describe #295 in a CHANGELOG
  Add #302 description to changelog
  Fix formatting
  Apply prettier config
  Install prettier
  Remove formatting esilnt rules
  sendTransactionAsync should return txHash string
  Added Event generation to abi-gen
  Publish
  Add dates to CHANGELOG entries
  Update subproviders CHANGELOG
  Support both personal_sign and eth_sign
  Fix Ledger tests given change from `personal_sign` to `eth_sign`
  Update subprovider to catch correct RPC method
  Rename guide
  Update contribution guide
  Fix broken links in the abi-gen README
  Fix typing generation for arrays in which types separated by |s

52 files changed, 2299 insertions, 1266 deletions

diff --git a/packages/0x.js/CHANGELOG.md b/packages/0x.js/CHANGELOG.md
index 536b66fce..a37eb24cf 100644
--- a/packages/0x.js/CHANGELOG.md
+++ b/packages/0x.js/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CHANGELOG
 
-vx.x.x - _TBD_
+v0.29.0 - _December 28, 2017_
 ------------------------
     * Assert baseUnit amount supplied to `toUnitAmount` is integer amount. (#287)
     * `toBaseUnitAmount` throws if amount supplied has too many decimals (#287)
diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 145bbff16..2ece94614 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "0x.js",
-  "version": "0.28.0",
+  "version": "0.29.0",
   "description": "A javascript library for interacting with the 0x protocol",
   "keywords": [
     "0x.js",
@@ -45,10 +45,10 @@
     "node": ">=6.0.0"
   },
   "devDependencies": {
-    "@0xproject/abi-gen": "^0.0.3",
-    "@0xproject/dev-utils": "^0.0.2",
-    "@0xproject/tslint-config": "^0.3.0",
-    "@0xproject/types": "^0.1.1",
+    "@0xproject/abi-gen": "^0.0.4",
+    "@0xproject/dev-utils": "^0.0.3",
+    "@0xproject/tslint-config": "^0.4.0",
+    "@0xproject/types": "^0.1.2",
     "@types/bintrees": "^1.0.2",
     "@types/jsonschema": "^1.1.1",
     "@types/lodash": "^4.14.86",
@@ -84,10 +84,10 @@
     "webpack": "^3.1.0"
   },
   "dependencies": {
-    "@0xproject/assert": "^0.0.8",
-    "@0xproject/json-schemas": "^0.7.0",
-    "@0xproject/utils": "^0.1.1",
-    "@0xproject/web3-wrapper": "^0.1.1",
+    "@0xproject/assert": "^0.0.9",
+    "@0xproject/json-schemas": "^0.7.1",
+    "@0xproject/utils": "^0.1.2",
+    "@0xproject/web3-wrapper": "^0.1.2",
     "bignumber.js": "~4.1.0",
     "bintrees": "^1.0.2",
     "bn.js": "^4.11.8",
diff --git a/packages/0x.js/src/0x.ts b/packages/0x.js/src/0x.ts
index a18f1fc55..33efe8ba8 100644
--- a/packages/0x.js/src/0x.ts
+++ b/packages/0x.js/src/0x.ts
@@ -1,18 +1,18 @@
-import {schemas, SchemaValidator} from '@0xproject/json-schemas';
-import {bigNumberConfigs, intervalUtils} from '@0xproject/utils';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { schemas, SchemaValidator } from '@0xproject/json-schemas';
+import { bigNumberConfigs, intervalUtils } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 import * as ethUtil from 'ethereumjs-util';
 import * as _ from 'lodash';
 
-import {artifacts} from './artifacts';
-import {EtherTokenWrapper} from './contract_wrappers/ether_token_wrapper';
-import {ExchangeWrapper} from './contract_wrappers/exchange_wrapper';
-import {TokenRegistryWrapper} from './contract_wrappers/token_registry_wrapper';
-import {TokenTransferProxyWrapper} from './contract_wrappers/token_transfer_proxy_wrapper';
-import {TokenWrapper} from './contract_wrappers/token_wrapper';
-import {OrderStateWatcher} from './order_watcher/order_state_watcher';
-import {zeroExConfigSchema} from './schemas/zero_ex_config_schema';
+import { artifacts } from './artifacts';
+import { EtherTokenWrapper } from './contract_wrappers/ether_token_wrapper';
+import { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
+import { TokenRegistryWrapper } from './contract_wrappers/token_registry_wrapper';
+import { TokenTransferProxyWrapper } from './contract_wrappers/token_transfer_proxy_wrapper';
+import { TokenWrapper } from './contract_wrappers/token_wrapper';
+import { OrderStateWatcher } from './order_watcher/order_state_watcher';
+import { zeroExConfigSchema } from './schemas/zero_ex_config_schema';
 import {
     ECSignature,
     Order,
@@ -22,12 +22,12 @@ import {
     ZeroExConfig,
     ZeroExError,
 } from './types';
-import {AbiDecoder} from './utils/abi_decoder';
-import {assert} from './utils/assert';
-import {constants} from './utils/constants';
-import {decorators} from './utils/decorators';
-import {signatureUtils} from './utils/signature_utils';
-import {utils} from './utils/utils';
+import { AbiDecoder } from './utils/abi_decoder';
+import { assert } from './utils/assert';
+import { constants } from './utils/constants';
+import { decorators } from './utils/decorators';
+import { signatureUtils } from './utils/signature_utils';
+import { utils } from './utils/utils';
 
 // Customize our BigNumber instances
 bigNumberConfigs.configure();
@@ -161,7 +161,7 @@ export class ZeroEx {
      * @return  The resulting orderHash from hashing the supplied order.
      */
     @decorators.syncZeroExErrorHandler
-    public static getOrderHashHex(order: Order|SignedOrder): string {
+    public static getOrderHashHex(order: Order | SignedOrder): string {
         assert.doesConformToSchema('order', order, schemas.orderSchema);
         const orderHashHex = utils.getOrderHashHex(order);
         return orderHashHex;
@@ -188,12 +188,7 @@ export class ZeroEx {
             config.networkId,
             config.tokenTransferProxyContractAddress,
         );
-        this.token = new TokenWrapper(
-            this._web3Wrapper,
-            config.networkId,
-            this._abiDecoder,
-            this.proxy,
-        );
+        this.token = new TokenWrapper(this._web3Wrapper, config.networkId, this._abiDecoder, this.proxy);
         this.exchange = new ExchangeWrapper(
             this._web3Wrapper,
             config.networkId,
@@ -202,13 +197,17 @@ export class ZeroEx {
             config.exchangeContractAddress,
         );
         this.tokenRegistry = new TokenRegistryWrapper(
-            this._web3Wrapper, config.networkId, config.tokenRegistryContractAddress,
-        );
-        this.etherToken = new EtherTokenWrapper(
-            this._web3Wrapper, config.networkId, this._abiDecoder, this.token,
+            this._web3Wrapper,
+            config.networkId,
+            config.tokenRegistryContractAddress,
         );
+        this.etherToken = new EtherTokenWrapper(this._web3Wrapper, config.networkId, this._abiDecoder, this.token);
         this.orderStateWatcher = new OrderStateWatcher(
-            this._web3Wrapper, this._abiDecoder, this.token, this.exchange, config.orderWatcherConfig,
+            this._web3Wrapper,
+            this._abiDecoder,
+            this.token,
+            this.exchange,
+            config.orderWatcherConfig,
         );
     }
     /**
@@ -291,35 +290,39 @@ export class ZeroEx {
      * @return  Transaction receipt with decoded log args.
      */
     public async awaitTransactionMinedAsync(
-        txHash: string, pollingIntervalMs = 1000, timeoutMs?: number): Promise<TransactionReceiptWithDecodedLogs> {
+        txHash: string,
+        pollingIntervalMs = 1000,
+        timeoutMs?: number,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
         let timeoutExceeded = false;
         if (timeoutMs) {
-            setTimeout(() => timeoutExceeded = true, 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 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);
-        });
+                    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;
     }
diff --git a/packages/0x.js/src/artifacts.ts b/packages/0x.js/src/artifacts.ts
index 7219ac8e2..cbacd7d56 100644
--- a/packages/0x.js/src/artifacts.ts
+++ b/packages/0x.js/src/artifacts.ts
@@ -5,14 +5,14 @@ import * as TokenArtifact from './artifacts/Token.json';
 import * as TokenRegistryArtifact from './artifacts/TokenRegistry.json';
 import * as TokenTransferProxyArtifact from './artifacts/TokenTransferProxy.json';
 import * as ZRXArtifact from './artifacts/ZRX.json';
-import {Artifact} from './types';
+import { Artifact } from './types';
 
 export const artifacts = {
-    ZRXArtifact: ZRXArtifact as any as Artifact,
-    DummyTokenArtifact: DummyTokenArtifact as any as Artifact,
-    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,
+    ZRXArtifact: (ZRXArtifact as any) as Artifact,
+    DummyTokenArtifact: (DummyTokenArtifact as any) as Artifact,
+    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/packages/0x.js/src/contract_wrappers/contract_wrapper.ts b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
index 3f07e4e47..eb7e042e7 100644
--- a/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/contract_wrapper.ts
@@ -1,6 +1,6 @@
-import {intervalUtils} from '@0xproject/utils';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
-import {Block, BlockAndLogStreamer} from 'ethereumjs-blockstream';
+import { intervalUtils } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { Block, BlockAndLogStreamer } from 'ethereumjs-blockstream';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
@@ -17,11 +17,13 @@ import {
     RawLog,
     ZeroExError,
 } from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {constants} from '../utils/constants';
-import {filterUtils} from '../utils/filter_utils';
+import { AbiDecoder } from '../utils/abi_decoder';
+import { constants } from '../utils/constants';
+import { filterUtils } from '../utils/filter_utils';
 
-const CONTRACT_NAME_TO_NOT_FOUND_ERROR: {[contractName: string]: ZeroExError} = {
+const CONTRACT_NAME_TO_NOT_FOUND_ERROR: {
+    [contractName: string]: ZeroExError;
+} = {
     ZRX: ZeroExError.ZRXContractDoesNotExist,
     EtherToken: ZeroExError.EtherTokenContractDoesNotExist,
     Token: ZeroExError.TokenContractDoesNotExist,
@@ -34,12 +36,14 @@ export class ContractWrapper {
     protected _web3Wrapper: Web3Wrapper;
     private _networkId: number;
     private _abiDecoder?: AbiDecoder;
-    private _blockAndLogStreamerIfExists: BlockAndLogStreamer|undefined;
+    private _blockAndLogStreamerIfExists: 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;
+    private _filters: { [filterToken: string]: Web3.FilterObject };
+    private _filterCallbacks: {
+        [filterToken: string]: EventCallback<ContractEventArgs>;
+    };
+    private _onLogAddedSubscriptionToken: string | undefined;
+    private _onLogRemovedSubscriptionToken: string | undefined;
     constructor(web3Wrapper: Web3Wrapper, networkId: number, abiDecoder?: AbiDecoder) {
         this._web3Wrapper = web3Wrapper;
         this._networkId = networkId;
@@ -71,8 +75,12 @@ export class ContractWrapper {
         }
     }
     protected _subscribe<ArgsType extends ContractEventArgs>(
-        address: string, eventName: ContractEvents, indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi,
-        callback: EventCallback<ArgsType>): string {
+        address: string,
+        eventName: ContractEvents,
+        indexFilterValues: IndexedFilterValues,
+        abi: Web3.ContractAbi,
+        callback: EventCallback<ArgsType>,
+    ): string {
         const filter = filterUtils.getFilter(address, eventName, indexFilterValues, abi);
         if (_.isUndefined(this._blockAndLogStreamerIfExists)) {
             this._startBlockAndLogStream();
@@ -83,15 +91,20 @@ export class ContractWrapper {
         return filterToken;
     }
     protected async _getLogsAsync<ArgsType extends ContractEventArgs>(
-        address: string, eventName: ContractEvents, blockRange: BlockRange,
-        indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
+        address: string,
+        eventName: ContractEvents,
+        blockRange: BlockRange,
+        indexFilterValues: IndexedFilterValues,
+        abi: Web3.ContractAbi,
+    ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         const filter = filterUtils.getFilter(address, eventName, indexFilterValues, abi, blockRange);
         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 {
+        log: Web3.LogEntry,
+    ): LogWithDecodedArgs<ArgsType> | RawLog {
         if (_.isUndefined(this._abiDecoder)) {
             throw new Error(InternalZeroExError.NoAbiDecoder);
         }
@@ -99,7 +112,8 @@ export class ContractWrapper {
         return logWithDecodedArgs;
     }
     protected async _instantiateContractIfExistsAsync(
-        artifact: Artifact, addressIfExists?: string,
+        artifact: Artifact,
+        addressIfExists?: string,
     ): Promise<Web3.ContractInstance> {
         let contractAddress: string;
         if (_.isUndefined(addressIfExists)) {
@@ -114,9 +128,7 @@ export class ContractWrapper {
         if (!doesContractExist) {
             throw new Error(CONTRACT_NAME_TO_NOT_FOUND_ERROR[artifact.contract_name]);
         }
-        const contractInstance = this._web3Wrapper.getContractInstance(
-            artifact.abi, contractAddress,
-        );
+        const contractInstance = this._web3Wrapper.getContractInstance(artifact.abi, contractAddress);
         return contractInstance;
     }
     protected _getContractAddress(artifact: Artifact, addressIfExists?: string): string {
@@ -153,7 +165,8 @@ export class ContractWrapper {
         const catchAllLogFilter = {};
         this._blockAndLogStreamerIfExists.addLogFilter(catchAllLogFilter);
         this._blockAndLogStreamInterval = intervalUtils.setAsyncExcludingInterval(
-            this._reconcileBlockAsync.bind(this), constants.DEFAULT_BLOCK_POLLING_INTERVAL,
+            this._reconcileBlockAsync.bind(this),
+            constants.DEFAULT_BLOCK_POLLING_INTERVAL,
         );
         let isRemoved = false;
         this._onLogAddedSubscriptionToken = this._blockAndLogStreamerIfExists.subscribeToOnLogAdded(
@@ -179,7 +192,7 @@ export class ContractWrapper {
             // We need to coerce to Block type cause Web3.Block includes types for mempool blocks
             if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
                 // If we clear the interval while fetching the block - this._blockAndLogStreamer will be undefined
-                await this._blockAndLogStreamerIfExists.reconcileNewBlock(latestBlock as any as Block);
+                await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlock as any) as Block);
             }
         } catch (err) {
             const filterTokens = _.keys(this._filterCallbacks);
diff --git a/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts b/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
index 969f30463..09719b2d8 100644
--- a/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/ether_token_wrapper.ts
@@ -1,9 +1,9 @@
-import {schemas} from '@0xproject/json-schemas';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { schemas } from '@0xproject/json-schemas';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {artifacts} from '../artifacts';
+import { artifacts } from '../artifacts';
 import {
     BlockRange,
     EtherTokenContractEventArgs,
@@ -14,19 +14,21 @@ import {
     TransactionOpts,
     ZeroExError,
 } from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {assert} from '../utils/assert';
+import { AbiDecoder } from '../utils/abi_decoder';
+import { assert } from '../utils/assert';
 
-import {ContractWrapper} from './contract_wrapper';
-import {EtherTokenContract} from './generated/ether_token';
-import {TokenWrapper} from './token_wrapper';
+import { ContractWrapper } from './contract_wrapper';
+import { EtherTokenContract } from './generated/ether_token';
+import { TokenWrapper } from './token_wrapper';
 
 /**
  * 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 _etherTokenContractsByAddress: {[address: string]: EtherTokenContract} = {};
+    private _etherTokenContractsByAddress: {
+        [address: string]: EtherTokenContract;
+    } = {};
     private _tokenWrapper: TokenWrapper;
     constructor(web3Wrapper: Web3Wrapper, networkId: number, abiDecoder: AbiDecoder, tokenWrapper: TokenWrapper) {
         super(web3Wrapper, networkId, abiDecoder);
@@ -43,7 +45,10 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @return Transaction hash.
      */
     public async depositAsync(
-        etherTokenAddress: string, amountInWei: BigNumber, depositor: string, txOpts: TransactionOpts = {},
+        etherTokenAddress: string,
+        amountInWei: BigNumber,
+        depositor: string,
+        txOpts: TransactionOpts = {},
     ): Promise<string> {
         assert.isValidBaseUnitAmount('amountInWei', amountInWei);
         await assert.isSenderAddressAsync('depositor', depositor, this._web3Wrapper);
@@ -70,7 +75,10 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @return Transaction hash.
      */
     public async withdrawAsync(
-        etherTokenAddress: string, amountInWei: BigNumber, withdrawer: string, txOpts: TransactionOpts = {},
+        etherTokenAddress: string,
+        amountInWei: BigNumber,
+        withdrawer: string,
+        txOpts: TransactionOpts = {},
     ): Promise<string> {
         assert.isValidBaseUnitAmount('amountInWei', amountInWei);
         await assert.isSenderAddressAsync('withdrawer', withdrawer, this._web3Wrapper);
@@ -96,14 +104,21 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @return  Array of logs that match the parameters
      */
     public async getLogsAsync<ArgsType extends EtherTokenContractEventArgs>(
-        etherTokenAddress: string, eventName: EtherTokenEvents, blockRange: BlockRange,
-        indexFilterValues: IndexedFilterValues): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
+        etherTokenAddress: string,
+        eventName: EtherTokenEvents,
+        blockRange: BlockRange,
+        indexFilterValues: IndexedFilterValues,
+    ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.isETHAddressHex('etherTokenAddress', etherTokenAddress);
         assert.doesBelongToStringEnum('eventName', eventName, EtherTokenEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const logs = await this._getLogsAsync<ArgsType>(
-            etherTokenAddress, eventName, blockRange, indexFilterValues, artifacts.EtherTokenArtifact.abi,
+            etherTokenAddress,
+            eventName,
+            blockRange,
+            indexFilterValues,
+            artifacts.EtherTokenArtifact.abi,
         );
         return logs;
     }
@@ -117,14 +132,21 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @return Subscription token used later to unsubscribe
      */
     public subscribe<ArgsType extends EtherTokenContractEventArgs>(
-        etherTokenAddress: string, eventName: EtherTokenEvents, indexFilterValues: IndexedFilterValues,
-        callback: EventCallback<ArgsType>): string {
+        etherTokenAddress: string,
+        eventName: EtherTokenEvents,
+        indexFilterValues: IndexedFilterValues,
+        callback: EventCallback<ArgsType>,
+    ): string {
         assert.isETHAddressHex('etherTokenAddress', etherTokenAddress);
         assert.doesBelongToStringEnum('eventName', eventName, EtherTokenEvents);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const subscriptionToken = this._subscribe<ArgsType>(
-            etherTokenAddress, eventName, indexFilterValues, artifacts.EtherTokenArtifact.abi, callback,
+            etherTokenAddress,
+            eventName,
+            indexFilterValues,
+            artifacts.EtherTokenArtifact.abi,
+            callback,
         );
         return subscriptionToken;
     }
@@ -151,7 +173,8 @@ export class EtherTokenWrapper extends ContractWrapper {
             return etherTokenContract;
         }
         const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-            artifacts.EtherTokenArtifact, etherTokenAddress,
+            artifacts.EtherTokenArtifact,
+            etherTokenAddress,
         );
         const contractInstance = new EtherTokenContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
         etherTokenContract = contractInstance;
diff --git a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
index 70d2be7e9..a111128ba 100644
--- a/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/exchange_wrapper.ts
@@ -1,10 +1,10 @@
-import {schemas} from '@0xproject/json-schemas';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { schemas } from '@0xproject/json-schemas';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
-import {artifacts} from '../artifacts';
+import { artifacts } from '../artifacts';
 import {
     BlockParamLiteral,
     BlockRange,
@@ -28,16 +28,16 @@ import {
     SignedOrder,
     ValidateOrderFillableOpts,
 } from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {assert} from '../utils/assert';
-import {decorators} from '../utils/decorators';
-import {ExchangeTransferSimulator} from '../utils/exchange_transfer_simulator';
-import {OrderValidationUtils} from '../utils/order_validation_utils';
-import {utils} from '../utils/utils';
+import { AbiDecoder } from '../utils/abi_decoder';
+import { assert } from '../utils/assert';
+import { decorators } from '../utils/decorators';
+import { ExchangeTransferSimulator } from '../utils/exchange_transfer_simulator';
+import { OrderValidationUtils } from '../utils/order_validation_utils';
+import { utils } from '../utils/utils';
 
-import {ContractWrapper} from './contract_wrapper';
-import {ExchangeContract} from './generated/exchange';
-import {TokenWrapper} from './token_wrapper';
+import { ContractWrapper } from './contract_wrapper';
+import { ExchangeContract } from './generated/exchange';
+import { TokenWrapper } from './token_wrapper';
 
 const SHOULD_VALIDATE_BY_DEFAULT = true;
 
@@ -81,8 +81,13 @@ export class ExchangeWrapper extends ContractWrapper {
         ];
         return [orderAddresses, orderValues];
     }
-    constructor(web3Wrapper: Web3Wrapper, networkId: number, abiDecoder: AbiDecoder,
-                tokenWrapper: TokenWrapper, contractAddressIfExists?: string) {
+    constructor(
+        web3Wrapper: Web3Wrapper,
+        networkId: number,
+        abiDecoder: AbiDecoder,
+        tokenWrapper: TokenWrapper,
+        contractAddressIfExists?: string,
+    ) {
         super(web3Wrapper, networkId, abiDecoder);
         this._tokenWrapper = tokenWrapper;
         this._orderValidationUtils = new OrderValidationUtils(this);
@@ -97,14 +102,14 @@ export class ExchangeWrapper extends ContractWrapper {
      * @param   methodOpts              Optional arguments this method accepts.
      * @return  The amount of the order (in taker tokens) that has either been filled or cancelled.
      */
-    public async getUnavailableTakerAmountAsync(orderHash: string,
-                                                methodOpts?: MethodOpts): Promise<BigNumber> {
+    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,
+            orderHash,
+            defaultBlock,
         );
         // Wrap BigNumbers returned from web3 with our own (later) version of BigNumber
         unavailableTakerTokenAmount = new BigNumber(unavailableTakerTokenAmount);
@@ -163,24 +168,32 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async fillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber,
-                                shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                takerAddress: string,
-                                orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
+    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.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const zrxTokenAddress = this.getZRXTokenAddress();
             const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
             await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
+                exchangeTradeEmulator,
+                signedOrder,
+                fillTakerTokenAmount,
+                takerAddress,
+                zrxTokenAddress,
+            );
         }
 
         const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
@@ -219,30 +232,42 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async fillOrdersUpToAsync(signedOrders: SignedOrder[], fillTakerTokenAmount: BigNumber,
-                                     shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                     takerAddress: string,
-                                     orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
+    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);
+        assert.hasAtMostOneUniqueValue(
+            takerTokenAddresses,
+            ExchangeContractErrs.MultipleTakerTokensInFillUpToDisallowed,
+        );
         const exchangeContractAddresses = _.map(signedOrders, signedOrder => signedOrder.exchangeContractAddress);
-        assert.hasAtMostOneUniqueValue(exchangeContractAddresses,
-                                       ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress);
+        assert.hasAtMostOneUniqueValue(
+            exchangeContractAddresses,
+            ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress,
+        );
         assert.isValidBaseUnitAmount('fillTakerTokenAmount', fillTakerTokenAmount);
         assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
 
-        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const zrxTokenAddress = this.getZRXTokenAddress();
             const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
             for (const signedOrder of signedOrders) {
                 await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
+                    exchangeTradeEmulator,
+                    signedOrder,
+                    fillTakerTokenAmount,
+                    takerAddress,
+                    zrxTokenAddress,
+                );
             }
         }
 
@@ -300,29 +325,36 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async batchFillOrdersAsync(orderFillRequests: OrderFillRequest[],
-                                      shouldThrowOnInsufficientBalanceOrAllowance: boolean,
-                                      takerAddress: string,
-                                      orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
+    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.hasAtMostOneUniqueValue(
+            exchangeContractAddresses,
+            ExchangeContractErrs.BatchOrdersMustHaveSameExchangeAddress,
+        );
         assert.isBoolean('shouldThrowOnInsufficientBalanceOrAllowance', shouldThrowOnInsufficientBalanceOrAllowance);
         await assert.isSenderAddressAsync('takerAddress', takerAddress, this._web3Wrapper);
-        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const zrxTokenAddress = this.getZRXTokenAddress();
             const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
             for (const orderFillRequest of orderFillRequests) {
                 await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount,
-                    takerAddress, zrxTokenAddress,
+                    exchangeTradeEmulator,
+                    orderFillRequest.signedOrder,
+                    orderFillRequest.takerTokenFillAmount,
+                    takerAddress,
+                    zrxTokenAddress,
                 );
             }
         }
@@ -373,23 +405,31 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async fillOrKillOrderAsync(signedOrder: SignedOrder, fillTakerTokenAmount: BigNumber,
-                                      takerAddress: string,
-                                      orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
+    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.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const zrxTokenAddress = this.getZRXTokenAddress();
             const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
             await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-                exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
+                exchangeTradeEmulator,
+                signedOrder,
+                fillTakerTokenAmount,
+                takerAddress,
+                zrxTokenAddress,
+            );
         }
 
         const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(signedOrder);
@@ -418,33 +458,39 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async batchFillOrKillAsync(orderFillRequests: OrderFillRequest[],
-                                      takerAddress: string,
-                                      orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
-        assert.doesConformToSchema('orderFillRequests', orderFillRequests,
-                                   schemas.orderFillRequestsSchema);
+    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);
+        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.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const zrxTokenAddress = this.getZRXTokenAddress();
             const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
             for (const orderFillRequest of orderFillRequests) {
                 await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-                    exchangeTradeEmulator, orderFillRequest.signedOrder, orderFillRequest.takerTokenFillAmount,
-                    takerAddress, zrxTokenAddress,
+                    exchangeTradeEmulator,
+                    orderFillRequest.signedOrder,
+                    orderFillRequest.takerTokenFillAmount,
+                    takerAddress,
+                    zrxTokenAddress,
                 );
             }
         }
@@ -460,8 +506,9 @@ export class ExchangeWrapper extends ContractWrapper {
         });
 
         // 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 [orderAddresses, orderValues, fillTakerTokenAmounts, vParams, rParams, sParams] = _.unzip<any>(
+            orderAddressesValuesAndTakerTokenFillAmounts,
+        );
         const txHash = await exchangeInstance.batchFillOrKillOrders.sendTransactionAsync(
             orderAddresses,
             orderValues,
@@ -486,23 +533,28 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async cancelOrderAsync(order: Order|SignedOrder,
-                                  cancelTakerTokenAmount: BigNumber,
-                                  orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
+    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.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? SHOULD_VALIDATE_BY_DEFAULT
+            : orderTransactionOpts.shouldValidate;
         if (shouldValidate) {
             const orderHash = utils.getOrderHashHex(order);
             const unavailableTakerTokenAmount = await this.getUnavailableTakerAmountAsync(orderHash);
             OrderValidationUtils.validateCancelOrderThrowIfInvalid(
-                order, cancelTakerTokenAmount, unavailableTakerTokenAmount);
+                order,
+                cancelTakerTokenAmount,
+                unavailableTakerTokenAmount,
+            );
         }
 
         const [orderAddresses, orderValues] = ExchangeWrapper._getOrderAddressesAndValues(order);
@@ -527,33 +579,40 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Transaction hash.
      */
     @decorators.asyncZeroExErrorHandler
-    public async batchCancelOrdersAsync(orderCancellationRequests: OrderCancellationRequest[],
-                                        orderTransactionOpts: OrderTransactionOpts = {}): Promise<string> {
-        assert.doesConformToSchema('orderCancellationRequests', orderCancellationRequests,
-                                   schemas.orderCancellationRequestsSchema);
+    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);
+        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.shouldValidate) ?
-                               SHOULD_VALIDATE_BY_DEFAULT :
-                               orderTransactionOpts.shouldValidate;
+        const shouldValidate = _.isUndefined(orderTransactionOpts.shouldValidate)
+            ? 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);
                 OrderValidationUtils.validateCancelOrderThrowIfInvalid(
-                    orderCancellationRequest.order, orderCancellationRequest.takerTokenCancelAmount,
+                    orderCancellationRequest.order,
+                    orderCancellationRequest.takerTokenCancelAmount,
                     unavailableTakerTokenAmount,
                 );
             }
-
         }
         if (_.isEmpty(orderCancellationRequests)) {
             throw new Error(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
@@ -566,8 +625,9 @@ export class ExchangeWrapper extends ContractWrapper {
             ];
         });
         // We use _.unzip<any> because _.unzip doesn't type check if values have different types :'(
-        const [orderAddresses, orderValues, cancelTakerTokenAmounts] =
-            _.unzip<any>(orderAddressesValuesAndTakerTokenCancelAmounts);
+        const [orderAddresses, orderValues, cancelTakerTokenAmounts] = _.unzip<any>(
+            orderAddressesValuesAndTakerTokenCancelAmounts,
+        );
         const txHash = await exchangeInstance.batchCancelOrders.sendTransactionAsync(
             orderAddresses,
             orderValues,
@@ -589,14 +649,20 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return Subscription token used later to unsubscribe
      */
     public subscribe<ArgsType extends ExchangeContractEventArgs>(
-        eventName: ExchangeEvents, indexFilterValues: IndexedFilterValues,
-        callback: EventCallback<ArgsType>): string {
+        eventName: ExchangeEvents,
+        indexFilterValues: IndexedFilterValues,
+        callback: EventCallback<ArgsType>,
+    ): string {
         assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const exchangeContractAddress = this.getContractAddress();
         const subscriptionToken = this._subscribe<ArgsType>(
-            exchangeContractAddress, eventName, indexFilterValues, artifacts.ExchangeArtifact.abi, callback,
+            exchangeContractAddress,
+            eventName,
+            indexFilterValues,
+            artifacts.ExchangeArtifact.abi,
+            callback,
         );
         return subscriptionToken;
     }
@@ -622,14 +688,20 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return  Array of logs that match the parameters
      */
     public async getLogsAsync<ArgsType extends ExchangeContractEventArgs>(
-        eventName: ExchangeEvents, blockRange: BlockRange, indexFilterValues: IndexedFilterValues,
+        eventName: ExchangeEvents,
+        blockRange: BlockRange,
+        indexFilterValues: IndexedFilterValues,
     ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const exchangeContractAddress = this.getContractAddress();
         const logs = await this._getLogsAsync<ArgsType>(
-            exchangeContractAddress, eventName, blockRange, indexFilterValues, artifacts.ExchangeArtifact.abi,
+            exchangeContractAddress,
+            eventName,
+            blockRange,
+            indexFilterValues,
+            artifacts.ExchangeArtifact.abi,
         );
         return logs;
     }
@@ -652,14 +724,18 @@ export class ExchangeWrapper extends ContractWrapper {
      *                          to validate for.
      */
     public async validateOrderFillableOrThrowAsync(
-        signedOrder: SignedOrder, opts?: ValidateOrderFillableOpts,
+        signedOrder: SignedOrder,
+        opts?: ValidateOrderFillableOpts,
     ): Promise<void> {
         assert.doesConformToSchema('signedOrder', signedOrder, schemas.signedOrderSchema);
         const zrxTokenAddress = this.getZRXTokenAddress();
         const expectedFillTakerTokenAmount = !_.isUndefined(opts) ? opts.expectedFillTakerTokenAmount : undefined;
         const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
         await this._orderValidationUtils.validateOrderFillableOrThrowAsync(
-            exchangeTradeEmulator, signedOrder, zrxTokenAddress, expectedFillTakerTokenAmount,
+            exchangeTradeEmulator,
+            signedOrder,
+            zrxTokenAddress,
+            expectedFillTakerTokenAmount,
         );
     }
     /**
@@ -670,16 +746,23 @@ export class ExchangeWrapper extends ContractWrapper {
      * @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> {
+    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 = this.getZRXTokenAddress();
         const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
         await this._orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
+            exchangeTradeEmulator,
+            signedOrder,
+            fillTakerTokenAmount,
+            takerAddress,
+            zrxTokenAddress,
+        );
     }
     /**
      * Checks if cancelling a given order will succeed and throws an informative error if it won't.
@@ -688,13 +771,18 @@ export class ExchangeWrapper extends ContractWrapper {
      * @param   cancelTakerTokenAmount  The amount (specified in taker tokens) that you would like to cancel.
      */
     public async validateCancelOrderThrowIfInvalidAsync(
-        order: Order, cancelTakerTokenAmount: BigNumber): Promise<void> {
+        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);
         OrderValidationUtils.validateCancelOrderThrowIfInvalid(
-            order, cancelTakerTokenAmount, unavailableTakerTokenAmount);
+            order,
+            cancelTakerTokenAmount,
+            unavailableTakerTokenAmount,
+        );
     }
     /**
      * Checks if calling fillOrKill on a given order will succeed and throws an informative error if it won't.
@@ -704,16 +792,23 @@ export class ExchangeWrapper extends ContractWrapper {
      * @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> {
+    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 = this.getZRXTokenAddress();
         const exchangeTradeEmulator = new ExchangeTransferSimulator(this._tokenWrapper, BlockParamLiteral.Latest);
         await this._orderValidationUtils.validateFillOrKillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress);
+            exchangeTradeEmulator,
+            signedOrder,
+            fillTakerTokenAmount,
+            takerAddress,
+            zrxTokenAddress,
+        );
     }
     /**
      * Checks if rounding error will be > 0.1% when computing makerTokenAmount by doing:
@@ -724,15 +819,19 @@ export class ExchangeWrapper extends ContractWrapper {
      * @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> {
+    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,
+            fillTakerTokenAmount,
+            takerTokenAmount,
+            makerTokenAmount,
         );
         return isRoundingError;
     }
@@ -740,10 +839,10 @@ export class ExchangeWrapper extends ContractWrapper {
      * 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 {
+    public throwLogErrorsAsErrors(logs: Array<LogWithDecodedArgs<DecodedLogArgs> | Web3.LogEntry>): void {
         const errLog = _.find(logs, {
             event: ExchangeEvents.LogError,
-        }) as LogWithDecodedArgs<LogErrorContractEventArgs>|undefined;
+        }) as LogWithDecodedArgs<LogErrorContractEventArgs> | undefined;
         if (!_.isUndefined(errLog)) {
             const logArgs = errLog.args;
             const errCode = logArgs.errorId.toNumber();
@@ -756,17 +855,18 @@ export class ExchangeWrapper extends ContractWrapper {
      * @return Address of ZRX token
      */
     public getZRXTokenAddress(): string {
-        const contractAddress = this._getContractAddress(
-            artifacts.ZRXArtifact, this._zrxContractAddressIfExists,
-        );
+        const contractAddress = this._getContractAddress(artifacts.ZRXArtifact, this._zrxContractAddressIfExists);
         return contractAddress;
     }
     private _invalidateContractInstances(): void {
         this.unsubscribeAll();
         delete this._exchangeContractIfExists;
     }
-    private async _isValidSignatureUsingContractCallAsync(dataHex: string, ecSignature: ECSignature,
-                                                          signerAddressHex: string): Promise<boolean> {
+    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);
@@ -782,7 +882,7 @@ export class ExchangeWrapper extends ContractWrapper {
         );
         return isValidSignature;
     }
-    private async _getOrderHashHexUsingContractCallAsync(order: Order|SignedOrder): Promise<string> {
+    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);
@@ -793,7 +893,8 @@ export class ExchangeWrapper extends ContractWrapper {
             return this._exchangeContractIfExists;
         }
         const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-            artifacts.ExchangeArtifact, this._contractAddressIfExists,
+            artifacts.ExchangeArtifact,
+            this._contractAddressIfExists,
         );
         const contractInstance = new ExchangeContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
         this._exchangeContractIfExists = contractInstance;
diff --git a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
index 69e9d7e21..f54aaf0f8 100644
--- a/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_registry_wrapper.ts
@@ -1,13 +1,13 @@
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
-import {artifacts} from '../artifacts';
-import {Token, TokenMetadata} from '../types';
-import {assert} from '../utils/assert';
-import {constants} from '../utils/constants';
+import { artifacts } from '../artifacts';
+import { Token, TokenMetadata } from '../types';
+import { assert } from '../utils/assert';
+import { constants } from '../utils/constants';
 
-import {ContractWrapper} from './contract_wrapper';
-import {TokenRegistryContract} from './generated/token_registry';
+import { ContractWrapper } from './contract_wrapper';
+import { TokenRegistryContract } from './generated/token_registry';
 
 /**
  * This class includes all the functionality related to interacting with the 0x Token Registry smart contract.
@@ -15,7 +15,7 @@ import {TokenRegistryContract} from './generated/token_registry';
 export class TokenRegistryWrapper extends ContractWrapper {
     private _tokenRegistryContractIfExists?: TokenRegistryContract;
     private _contractAddressIfExists?: string;
-    private static _createTokenFromMetadata(metadata: TokenMetadata): Token|undefined {
+    private static _createTokenFromMetadata(metadata: TokenMetadata): Token | undefined {
         if (metadata[0] === constants.NULL_ADDRESS) {
             return undefined;
         }
@@ -37,9 +37,8 @@ export class TokenRegistryWrapper extends ContractWrapper {
      */
     public async getTokensAsync(): Promise<Token[]> {
         const addresses = await this.getTokenAddressesAsync();
-        const tokenPromises: Array<Promise<Token|undefined>> = _.map(
-            addresses,
-            async (address: string) => this.getTokenIfExistsAsync(address),
+        const tokenPromises: Array<Promise<Token | undefined>> = _.map(addresses, async (address: string) =>
+            this.getTokenIfExistsAsync(address),
         );
         const tokens = await Promise.all(tokenPromises);
         return tokens as Token[];
@@ -57,7 +56,7 @@ export class TokenRegistryWrapper extends ContractWrapper {
      * 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> {
+    public async getTokenIfExistsAsync(address: string): Promise<Token | undefined> {
         assert.isETHAddressHex('address', address);
 
         const tokenRegistryContract = await this._getTokenRegistryContractAsync();
@@ -65,7 +64,7 @@ export class TokenRegistryWrapper extends ContractWrapper {
         const token = TokenRegistryWrapper._createTokenFromMetadata(metadata);
         return token;
     }
-    public async getTokenAddressBySymbolIfExistsAsync(symbol: string): Promise<string|undefined> {
+    public async getTokenAddressBySymbolIfExistsAsync(symbol: string): Promise<string | undefined> {
         assert.isString('symbol', symbol);
         const tokenRegistryContract = await this._getTokenRegistryContractAsync();
         const addressIfExists = await tokenRegistryContract.getTokenAddressBySymbol.callAsync(symbol);
@@ -74,7 +73,7 @@ export class TokenRegistryWrapper extends ContractWrapper {
         }
         return addressIfExists;
     }
-    public async getTokenAddressByNameIfExistsAsync(name: string): Promise<string|undefined> {
+    public async getTokenAddressByNameIfExistsAsync(name: string): Promise<string | undefined> {
         assert.isString('name', name);
         const tokenRegistryContract = await this._getTokenRegistryContractAsync();
         const addressIfExists = await tokenRegistryContract.getTokenAddressByName.callAsync(name);
@@ -83,14 +82,14 @@ export class TokenRegistryWrapper extends ContractWrapper {
         }
         return addressIfExists;
     }
-    public async getTokenBySymbolIfExistsAsync(symbol: string): Promise<Token|undefined> {
+    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 = TokenRegistryWrapper._createTokenFromMetadata(metadata);
         return token;
     }
-    public async getTokenByNameIfExistsAsync(name: string): Promise<Token|undefined> {
+    public async getTokenByNameIfExistsAsync(name: string): Promise<Token | undefined> {
         assert.isString('name', name);
         const tokenRegistryContract = await this._getTokenRegistryContractAsync();
         const metadata = await tokenRegistryContract.getTokenByName.callAsync(name);
@@ -104,7 +103,8 @@ export class TokenRegistryWrapper extends ContractWrapper {
      */
     public getContractAddress(): string {
         const contractAddress = this._getContractAddress(
-            artifacts.TokenRegistryArtifact, this._contractAddressIfExists,
+            artifacts.TokenRegistryArtifact,
+            this._contractAddressIfExists,
         );
         return contractAddress;
     }
@@ -116,10 +116,12 @@ export class TokenRegistryWrapper extends ContractWrapper {
             return this._tokenRegistryContractIfExists;
         }
         const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-            artifacts.TokenRegistryArtifact, this._contractAddressIfExists,
+            artifacts.TokenRegistryArtifact,
+            this._contractAddressIfExists,
         );
         const contractInstance = new TokenRegistryContract(
-            web3ContractInstance, this._web3Wrapper.getContractDefaults(),
+            web3ContractInstance,
+            this._web3Wrapper.getContractDefaults(),
         );
         this._tokenRegistryContractIfExists = contractInstance;
         return this._tokenRegistryContractIfExists;
diff --git a/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
index c67ef87df..f5d9d108a 100644
--- a/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_transfer_proxy_wrapper.ts
@@ -1,10 +1,10 @@
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
-import {artifacts} from '../artifacts';
+import { artifacts } from '../artifacts';
 
-import {ContractWrapper} from './contract_wrapper';
-import {TokenTransferProxyContract} from './generated/token_transfer_proxy';
+import { ContractWrapper } from './contract_wrapper';
+import { TokenTransferProxyContract } from './generated/token_transfer_proxy';
 
 /**
  * This class includes the functionality related to interacting with the TokenTransferProxy contract.
@@ -42,7 +42,8 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
      */
     public getContractAddress(): string {
         const contractAddress = this._getContractAddress(
-            artifacts.TokenTransferProxyArtifact, this._contractAddressIfExists,
+            artifacts.TokenTransferProxyArtifact,
+            this._contractAddressIfExists,
         );
         return contractAddress;
     }
@@ -54,10 +55,12 @@ export class TokenTransferProxyWrapper extends ContractWrapper {
             return this._tokenTransferProxyContractIfExists;
         }
         const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-            artifacts.TokenTransferProxyArtifact, this._contractAddressIfExists,
+            artifacts.TokenTransferProxyArtifact,
+            this._contractAddressIfExists,
         );
         const contractInstance = new TokenTransferProxyContract(
-            web3ContractInstance, this._web3Wrapper.getContractDefaults(),
+            web3ContractInstance,
+            this._web3Wrapper.getContractDefaults(),
         );
         this._tokenTransferProxyContractIfExists = contractInstance;
         return this._tokenTransferProxyContractIfExists;
diff --git a/packages/0x.js/src/contract_wrappers/token_wrapper.ts b/packages/0x.js/src/contract_wrappers/token_wrapper.ts
index a9eac10e0..bfa7da5b4 100644
--- a/packages/0x.js/src/contract_wrappers/token_wrapper.ts
+++ b/packages/0x.js/src/contract_wrappers/token_wrapper.ts
@@ -1,9 +1,9 @@
-import {schemas} from '@0xproject/json-schemas';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { schemas } from '@0xproject/json-schemas';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {artifacts} from '../artifacts';
+import { artifacts } from '../artifacts';
 import {
     BlockRange,
     EventCallback,
@@ -15,13 +15,13 @@ import {
     TransactionOpts,
     ZeroExError,
 } from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {assert} from '../utils/assert';
-import {constants} from '../utils/constants';
+import { AbiDecoder } from '../utils/abi_decoder';
+import { assert } from '../utils/assert';
+import { constants } from '../utils/constants';
 
-import {ContractWrapper} from './contract_wrapper';
-import {TokenContract} from './generated/token';
-import {TokenTransferProxyWrapper} from './token_transfer_proxy_wrapper';
+import { ContractWrapper } from './contract_wrapper';
+import { TokenContract } from './generated/token';
+import { TokenTransferProxyWrapper } from './token_transfer_proxy_wrapper';
 
 /**
  * This class includes all the functionality related to interacting with ERC20 token contracts.
@@ -30,10 +30,14 @@ import {TokenTransferProxyWrapper} from './token_transfer_proxy_wrapper';
  */
 export class TokenWrapper extends ContractWrapper {
     public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
-    private _tokenContractsByAddress: {[address: string]: TokenContract};
+    private _tokenContractsByAddress: { [address: string]: TokenContract };
     private _tokenTransferProxyWrapper: TokenTransferProxyWrapper;
-    constructor(web3Wrapper: Web3Wrapper, networkId: number, abiDecoder: AbiDecoder,
-                tokenTransferProxyWrapper: TokenTransferProxyWrapper) {
+    constructor(
+        web3Wrapper: Web3Wrapper,
+        networkId: number,
+        abiDecoder: AbiDecoder,
+        tokenTransferProxyWrapper: TokenTransferProxyWrapper,
+    ) {
         super(web3Wrapper, networkId, abiDecoder);
         this._tokenContractsByAddress = {};
         this._tokenTransferProxyWrapper = tokenTransferProxyWrapper;
@@ -45,8 +49,11 @@ export class TokenWrapper extends ContractWrapper {
      * @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> {
+    public async getBalanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        methodOpts?: MethodOpts,
+    ): Promise<BigNumber> {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
 
@@ -68,8 +75,13 @@ export class TokenWrapper extends ContractWrapper {
      * @param   txOpts              Transaction parameters.
      * @return Transaction hash.
      */
-    public async setAllowanceAsync(tokenAddress: string, ownerAddress: string, spenderAddress: string,
-                                   amountInBaseUnits: BigNumber, txOpts: TransactionOpts = {}): Promise<string> {
+    public async setAllowanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        spenderAddress: string,
+        amountInBaseUnits: BigNumber,
+        txOpts: TransactionOpts = {},
+    ): Promise<string> {
         await assert.isSenderAddressAsync('ownerAddress', ownerAddress, this._web3Wrapper);
         assert.isETHAddressHex('spenderAddress', spenderAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
@@ -95,10 +107,18 @@ export class TokenWrapper extends ContractWrapper {
      * @param   txOpts              Transaction parameters.
      * @return Transaction hash.
      */
-    public async setUnlimitedAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                            spenderAddress: string, txOpts: TransactionOpts = {}): Promise<string> {
+    public async setUnlimitedAllowanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        spenderAddress: string,
+        txOpts: TransactionOpts = {},
+    ): Promise<string> {
         const txHash = await this.setAllowanceAsync(
-            tokenAddress, ownerAddress, spenderAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS, txOpts,
+            tokenAddress,
+            ownerAddress,
+            spenderAddress,
+            this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
+            txOpts,
         );
         return txHash;
     }
@@ -110,8 +130,12 @@ export class TokenWrapper extends ContractWrapper {
      * @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> {
+    public async getAllowanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        spenderAddress: string,
+        methodOpts?: MethodOpts,
+    ): Promise<BigNumber> {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
 
@@ -128,8 +152,11 @@ export class TokenWrapper extends ContractWrapper {
      * @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> {
+    public async getProxyAllowanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        methodOpts?: MethodOpts,
+    ): Promise<BigNumber> {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
 
@@ -147,15 +174,23 @@ export class TokenWrapper extends ContractWrapper {
      * @param   txOpts              Transaction parameters.
      * @return Transaction hash.
      */
-    public async setProxyAllowanceAsync(tokenAddress: string, ownerAddress: string,
-                                        amountInBaseUnits: BigNumber, txOpts: TransactionOpts = {}): Promise<string> {
+    public async setProxyAllowanceAsync(
+        tokenAddress: string,
+        ownerAddress: string,
+        amountInBaseUnits: BigNumber,
+        txOpts: TransactionOpts = {},
+    ): Promise<string> {
         assert.isETHAddressHex('ownerAddress', ownerAddress);
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.isValidBaseUnitAmount('amountInBaseUnits', amountInBaseUnits);
 
         const proxyAddress = this._tokenTransferProxyWrapper.getContractAddress();
         const txHash = await this.setAllowanceAsync(
-            tokenAddress, ownerAddress, proxyAddress, amountInBaseUnits, txOpts,
+            tokenAddress,
+            ownerAddress,
+            proxyAddress,
+            amountInBaseUnits,
+            txOpts,
         );
         return txHash;
     }
@@ -171,10 +206,15 @@ export class TokenWrapper extends ContractWrapper {
      * @return Transaction hash.
      */
     public async setUnlimitedProxyAllowanceAsync(
-        tokenAddress: string, ownerAddress: string, txOpts: TransactionOpts = {},
+        tokenAddress: string,
+        ownerAddress: string,
+        txOpts: TransactionOpts = {},
     ): Promise<string> {
         const txHash = await this.setProxyAllowanceAsync(
-            tokenAddress, ownerAddress, this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS, txOpts,
+            tokenAddress,
+            ownerAddress,
+            this.UNLIMITED_ALLOWANCE_IN_BASE_UNITS,
+            txOpts,
         );
         return txHash;
     }
@@ -187,8 +227,13 @@ export class TokenWrapper extends ContractWrapper {
      * @param   txOpts              Transaction parameters.
      * @return Transaction hash.
      */
-    public async transferAsync(tokenAddress: string, fromAddress: string, toAddress: string,
-                               amountInBaseUnits: BigNumber, txOpts: TransactionOpts = {}): Promise<string> {
+    public async transferAsync(
+        tokenAddress: string,
+        fromAddress: string,
+        toAddress: string,
+        amountInBaseUnits: BigNumber,
+        txOpts: TransactionOpts = {},
+    ): Promise<string> {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         await assert.isSenderAddressAsync('fromAddress', fromAddress, this._web3Wrapper);
         assert.isETHAddressHex('toAddress', toAddress);
@@ -222,9 +267,14 @@ export class TokenWrapper extends ContractWrapper {
      * @param   txOpts              Transaction parameters.
      * @return Transaction hash.
      */
-    public async transferFromAsync(tokenAddress: string, fromAddress: string, toAddress: string,
-                                   senderAddress: string, amountInBaseUnits: BigNumber, txOpts: TransactionOpts = {}):
-                                   Promise<string> {
+    public async transferFromAsync(
+        tokenAddress: string,
+        fromAddress: string,
+        toAddress: string,
+        senderAddress: string,
+        amountInBaseUnits: BigNumber,
+        txOpts: TransactionOpts = {},
+    ): Promise<string> {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.isETHAddressHex('fromAddress', fromAddress);
         assert.isETHAddressHex('toAddress', toAddress);
@@ -244,7 +294,9 @@ export class TokenWrapper extends ContractWrapper {
         }
 
         const txHash = await tokenContract.transferFrom.sendTransactionAsync(
-            fromAddress, toAddress, amountInBaseUnits,
+            fromAddress,
+            toAddress,
+            amountInBaseUnits,
             {
                 from: senderAddress,
                 gas: txOpts.gasLimit,
@@ -263,14 +315,21 @@ export class TokenWrapper extends ContractWrapper {
      * @return Subscription token used later to unsubscribe
      */
     public subscribe<ArgsType extends TokenContractEventArgs>(
-        tokenAddress: string, eventName: TokenEvents, indexFilterValues: IndexedFilterValues,
-        callback: EventCallback<ArgsType>): string {
+        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,
+            tokenAddress,
+            eventName,
+            indexFilterValues,
+            artifacts.TokenArtifact.abi,
+            callback,
         );
         return subscriptionToken;
     }
@@ -297,14 +356,21 @@ export class TokenWrapper extends ContractWrapper {
      * @return  Array of logs that match the parameters
      */
     public async getLogsAsync<ArgsType extends TokenContractEventArgs>(
-        tokenAddress: string, eventName: TokenEvents, blockRange: BlockRange,
-        indexFilterValues: IndexedFilterValues): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
+        tokenAddress: string,
+        eventName: TokenEvents,
+        blockRange: BlockRange,
+        indexFilterValues: IndexedFilterValues,
+    ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
         assert.doesBelongToStringEnum('eventName', eventName, TokenEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const logs = await this._getLogsAsync<ArgsType>(
-            tokenAddress, eventName, blockRange, indexFilterValues, artifacts.TokenArtifact.abi,
+            tokenAddress,
+            eventName,
+            blockRange,
+            indexFilterValues,
+            artifacts.TokenArtifact.abi,
         );
         return logs;
     }
@@ -318,11 +384,10 @@ export class TokenWrapper extends ContractWrapper {
             return tokenContract;
         }
         const web3ContractInstance = await this._instantiateContractIfExistsAsync(
-            artifacts.TokenArtifact, tokenAddress,
-        );
-        const contractInstance = new TokenContract(
-            web3ContractInstance, this._web3Wrapper.getContractDefaults(),
+            artifacts.TokenArtifact,
+            tokenAddress,
         );
+        const contractInstance = new TokenContract(web3ContractInstance, this._web3Wrapper.getContractDefaults());
         tokenContract = contractInstance;
         this._tokenContractsByAddress[tokenAddress] = tokenContract;
         return tokenContract;
diff --git a/packages/0x.js/src/globals.d.ts b/packages/0x.js/src/globals.d.ts
index 4fa1cfd9c..dc2b02305 100644
--- a/packages/0x.js/src/globals.d.ts
+++ b/packages/0x.js/src/globals.d.ts
@@ -57,8 +57,7 @@ declare module 'truffle-hdwallet-provider' {
 }
 
 // abi-decoder declarations
-interface DecodedLogArg {
-}
+interface DecodedLogArg {}
 interface DecodedLog {
     name: string;
     events: DecodedLogArg[];
diff --git a/packages/0x.js/src/globalsAugment.d.ts b/packages/0x.js/src/globalsAugment.d.ts
index 60e2312a3..e018fdc54 100644
--- a/packages/0x.js/src/globalsAugment.d.ts
+++ b/packages/0x.js/src/globalsAugment.d.ts
@@ -9,7 +9,7 @@ declare global {
     /* tslint:disable */
     namespace Chai {
         interface NumberComparer {
-            (value: number|BigNumber, message?: string): Assertion;
+            (value: number | BigNumber, message?: string): Assertion;
         }
         interface NumericComparison {
             greaterThan: NumberComparer;
@@ -18,6 +18,6 @@ declare global {
     /* tslint:enable */
     interface DecodedLogArg {
         name: string;
-        value: string|BigNumber;
+        value: string | BigNumber;
     }
 }
diff --git a/packages/0x.js/src/index.ts b/packages/0x.js/src/index.ts
index da06aad34..599c3a2b0 100644
--- a/packages/0x.js/src/index.ts
+++ b/packages/0x.js/src/index.ts
@@ -1,4 +1,4 @@
-export {ZeroEx} from './0x';
+export { ZeroEx } from './0x';
 
 export {
     Order,
@@ -47,6 +47,4 @@ export {
     OrderState,
 } from './types';
 
-export {
-    TransactionReceipt,
-} from '@0xproject/types';
+export { TransactionReceipt } from '@0xproject/types';
diff --git a/packages/0x.js/src/order_watcher/event_watcher.ts b/packages/0x.js/src/order_watcher/event_watcher.ts
index 197dfae65..fc0b9264c 100644
--- a/packages/0x.js/src/order_watcher/event_watcher.ts
+++ b/packages/0x.js/src/order_watcher/event_watcher.ts
@@ -1,14 +1,10 @@
-import {intervalUtils} from '@0xproject/utils';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { intervalUtils } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
-import {
-    BlockParamLiteral,
-    EventWatcherCallback,
-    ZeroExError,
-} from '../types';
-import {assert} from '../utils/assert';
+import { BlockParamLiteral, EventWatcherCallback, ZeroExError } from '../types';
+import { assert } from '../utils/assert';
 
 const DEFAULT_EVENT_POLLING_INTERVAL_MS = 200;
 
@@ -26,11 +22,11 @@ export class EventWatcher {
     private _pollingIntervalMs: number;
     private _intervalIdIfExists?: NodeJS.Timer;
     private _lastEvents: Web3.LogEntry[] = [];
-    constructor(web3Wrapper: Web3Wrapper, pollingIntervalIfExistsMs: undefined|number) {
+    constructor(web3Wrapper: Web3Wrapper, pollingIntervalIfExistsMs: undefined | number) {
         this._web3Wrapper = web3Wrapper;
-        this._pollingIntervalMs = _.isUndefined(pollingIntervalIfExistsMs) ?
-                                    DEFAULT_EVENT_POLLING_INTERVAL_MS :
-                                    pollingIntervalIfExistsMs;
+        this._pollingIntervalMs = _.isUndefined(pollingIntervalIfExistsMs)
+            ? DEFAULT_EVENT_POLLING_INTERVAL_MS
+            : pollingIntervalIfExistsMs;
     }
     public subscribe(callback: EventWatcherCallback): void {
         assert.isFunction('callback', callback);
@@ -38,7 +34,8 @@ export class EventWatcher {
             throw new Error(ZeroExError.SubscriptionAlreadyPresent);
         }
         this._intervalIdIfExists = intervalUtils.setAsyncExcludingInterval(
-            this._pollForBlockchainEventsAsync.bind(this, callback), this._pollingIntervalMs,
+            this._pollForBlockchainEventsAsync.bind(this, callback),
+            this._pollingIntervalMs,
         );
     }
     public unsubscribe(): void {
@@ -71,7 +68,9 @@ export class EventWatcher {
         return events;
     }
     private async _emitDifferencesAsync(
-        logs: Web3.LogEntry[], logEventState: LogEventState, callback: EventWatcherCallback,
+        logs: Web3.LogEntry[],
+        logEventState: LogEventState,
+        callback: EventWatcherCallback,
     ): Promise<void> {
         for (const log of logs) {
             const logEvent = {
diff --git a/packages/0x.js/src/order_watcher/expiration_watcher.ts b/packages/0x.js/src/order_watcher/expiration_watcher.ts
index e71f11129..47e03dd38 100644
--- a/packages/0x.js/src/order_watcher/expiration_watcher.ts
+++ b/packages/0x.js/src/order_watcher/expiration_watcher.ts
@@ -1,10 +1,10 @@
-import {intervalUtils} from '@0xproject/utils';
-import {BigNumber} from 'bignumber.js';
-import {RBTree} from 'bintrees';
+import { intervalUtils } from '@0xproject/utils';
+import { BigNumber } from 'bignumber.js';
+import { RBTree } from 'bintrees';
 import * as _ from 'lodash';
 
-import {ZeroExError} from '../types';
-import {utils} from '../utils/utils';
+import { ZeroExError } from '../types';
+import { utils } from '../utils/utils';
 
 const DEFAULT_EXPIRATION_MARGIN_MS = 0;
 const DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS = 50;
@@ -15,16 +15,14 @@ const DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS = 50;
  */
 export class ExpirationWatcher {
     private _orderHashByExpirationRBTree: RBTree<string>;
-    private _expiration: {[orderHash: string]: BigNumber} = {};
+    private _expiration: { [orderHash: string]: BigNumber } = {};
     private _orderExpirationCheckingIntervalMs: number;
     private _expirationMarginMs: number;
     private _orderExpirationCheckingIntervalIdIfExists?: NodeJS.Timer;
-    constructor(expirationMarginIfExistsMs?: number,
-                orderExpirationCheckingIntervalIfExistsMs?: number) {
-        this._expirationMarginMs = expirationMarginIfExistsMs ||
-                                  DEFAULT_EXPIRATION_MARGIN_MS;
-        this._orderExpirationCheckingIntervalMs = expirationMarginIfExistsMs ||
-                                                 DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS;
+    constructor(expirationMarginIfExistsMs?: number, orderExpirationCheckingIntervalIfExistsMs?: number) {
+        this._expirationMarginMs = expirationMarginIfExistsMs || DEFAULT_EXPIRATION_MARGIN_MS;
+        this._orderExpirationCheckingIntervalMs =
+            expirationMarginIfExistsMs || DEFAULT_ORDER_EXPIRATION_CHECKING_INTERVAL_MS;
         const scoreFunction = (orderHash: string) => this._expiration[orderHash].toNumber();
         const comparator = (lhs: string, rhs: string) => scoreFunction(lhs) - scoreFunction(rhs);
         this._orderHashByExpirationRBTree = new RBTree(comparator);
@@ -34,7 +32,8 @@ export class ExpirationWatcher {
             throw new Error(ZeroExError.SubscriptionAlreadyPresent);
         }
         this._orderExpirationCheckingIntervalIdIfExists = intervalUtils.setAsyncExcludingInterval(
-            this._pruneExpiredOrders.bind(this, callback), this._orderExpirationCheckingIntervalMs,
+            this._pruneExpiredOrders.bind(this, callback),
+            this._orderExpirationCheckingIntervalMs,
         );
     }
     public unsubscribe(): void {
diff --git a/packages/0x.js/src/order_watcher/order_state_watcher.ts b/packages/0x.js/src/order_watcher/order_state_watcher.ts
index 9d5c96b0e..9d7a733d8 100644
--- a/packages/0x.js/src/order_watcher/order_state_watcher.ts
+++ b/packages/0x.js/src/order_watcher/order_state_watcher.ts
@@ -1,13 +1,13 @@
-import {schemas} from '@0xproject/json-schemas';
-import {intervalUtils} from '@0xproject/utils';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { schemas } from '@0xproject/json-schemas';
+import { intervalUtils } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
-import {ZeroEx} from '../0x';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-import {OrderFilledCancelledLazyStore} from '../stores/order_filled_cancelled_lazy_store';
+import { ZeroEx } from '../0x';
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
+import { TokenWrapper } from '../contract_wrappers/token_wrapper';
+import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
+import { OrderFilledCancelledLazyStore } from '../stores/order_filled_cancelled_lazy_store';
 import {
     ApprovalContractEventArgs,
     BlockParamLiteral,
@@ -29,13 +29,13 @@ import {
     WithdrawalContractEventArgs,
     ZeroExError,
 } from '../types';
-import {AbiDecoder} from '../utils/abi_decoder';
-import {assert} from '../utils/assert';
-import {OrderStateUtils} from '../utils/order_state_utils';
-import {utils} from '../utils/utils';
+import { AbiDecoder } from '../utils/abi_decoder';
+import { assert } from '../utils/assert';
+import { OrderStateUtils } from '../utils/order_state_utils';
+import { utils } from '../utils/utils';
 
-import {EventWatcher} from './event_watcher';
-import {ExpirationWatcher} from './expiration_watcher';
+import { EventWatcher } from './event_watcher';
+import { ExpirationWatcher } from './expiration_watcher';
 
 interface DependentOrderHashes {
     [makerAddress: string]: {
@@ -74,7 +74,10 @@ export class OrderStateWatcher {
     private _cleanupJobInterval: number;
     private _cleanupJobIntervalIdIfExists?: NodeJS.Timer;
     constructor(
-        web3Wrapper: Web3Wrapper, abiDecoder: AbiDecoder, token: TokenWrapper, exchange: ExchangeWrapper,
+        web3Wrapper: Web3Wrapper,
+        abiDecoder: AbiDecoder,
+        token: TokenWrapper,
+        exchange: ExchangeWrapper,
         config?: OrderStateWatcherConfig,
     ) {
         this._abiDecoder = abiDecoder;
@@ -82,24 +85,26 @@ export class OrderStateWatcher {
         const pollingIntervalIfExistsMs = _.isUndefined(config) ? undefined : config.eventPollingIntervalMs;
         this._eventWatcher = new EventWatcher(web3Wrapper, pollingIntervalIfExistsMs);
         this._balanceAndProxyAllowanceLazyStore = new BalanceAndProxyAllowanceLazyStore(
-            token, BlockParamLiteral.Pending,
+            token,
+            BlockParamLiteral.Pending,
         );
         this._orderFilledCancelledLazyStore = new OrderFilledCancelledLazyStore(exchange);
         this._orderStateUtils = new OrderStateUtils(
-            this._balanceAndProxyAllowanceLazyStore, this._orderFilledCancelledLazyStore,
+            this._balanceAndProxyAllowanceLazyStore,
+            this._orderFilledCancelledLazyStore,
         );
-        const orderExpirationCheckingIntervalMsIfExists = _.isUndefined(config) ?
-                                                          undefined :
-                                                          config.orderExpirationCheckingIntervalMs;
-        const expirationMarginIfExistsMs = _.isUndefined(config) ?
-                                           undefined :
-                                           config.expirationMarginMs;
+        const orderExpirationCheckingIntervalMsIfExists = _.isUndefined(config)
+            ? undefined
+            : config.orderExpirationCheckingIntervalMs;
+        const expirationMarginIfExistsMs = _.isUndefined(config) ? undefined : config.expirationMarginMs;
         this._expirationWatcher = new ExpirationWatcher(
-            expirationMarginIfExistsMs, orderExpirationCheckingIntervalMsIfExists,
+            expirationMarginIfExistsMs,
+            orderExpirationCheckingIntervalMsIfExists,
         );
-        this._cleanupJobInterval = _.isUndefined(config) || _.isUndefined(config.cleanupJobIntervalMs) ?
-                                   DEFAULT_CLEANUP_JOB_INTERVAL_MS :
-                                   config.cleanupJobIntervalMs;
+        this._cleanupJobInterval =
+            _.isUndefined(config) || _.isUndefined(config.cleanupJobIntervalMs)
+                ? DEFAULT_CLEANUP_JOB_INTERVAL_MS
+                : config.cleanupJobIntervalMs;
     }
     /**
      * Add an order to the orderStateWatcher. Before the order is added, it's
@@ -148,7 +153,8 @@ export class OrderStateWatcher {
         this._eventWatcher.subscribe(this._onEventWatcherCallbackAsync.bind(this));
         this._expirationWatcher.subscribe(this._onOrderExpired.bind(this));
         this._cleanupJobIntervalIdIfExists = intervalUtils.setAsyncExcludingInterval(
-            this._cleanupAsync.bind(this), this._cleanupJobInterval,
+            this._cleanupAsync.bind(this),
+            this._cleanupJobInterval,
         );
     }
     /**
@@ -215,23 +221,23 @@ export class OrderStateWatcher {
         let makerToken: string;
         let makerAddress: string;
         switch (decodedLog.event) {
-            case TokenEvents.Approval:
-            {
+            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;
-                if (!_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
-                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])) {
+                if (
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])
+                ) {
                     const orderHashes = Array.from(this._dependentOrderHashes[makerAddress][makerToken]);
                     await this._emitRevalidateOrdersAsync(orderHashes);
                 }
                 break;
             }
-            case TokenEvents.Transfer:
-            {
+            case TokenEvents.Transfer: {
                 // Invalidate cache
                 const args = decodedLog.args as TransferContractEventArgs;
                 this._balanceAndProxyAllowanceLazyStore.deleteBalance(decodedLog.address, args._from);
@@ -239,45 +245,48 @@ export class OrderStateWatcher {
                 // Revalidate orders
                 makerToken = decodedLog.address;
                 makerAddress = args._from;
-                if (!_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
-                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])) {
+                if (
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])
+                ) {
                     const orderHashes = Array.from(this._dependentOrderHashes[makerAddress][makerToken]);
                     await this._emitRevalidateOrdersAsync(orderHashes);
                 }
                 break;
             }
-            case EtherTokenEvents.Deposit:
-            {
+            case EtherTokenEvents.Deposit: {
                 // Invalidate cache
                 const args = decodedLog.args as DepositContractEventArgs;
                 this._balanceAndProxyAllowanceLazyStore.deleteBalance(decodedLog.address, args._owner);
                 // Revalidate orders
                 makerToken = decodedLog.address;
                 makerAddress = args._owner;
-                if (!_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
-                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])) {
+                if (
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])
+                ) {
                     const orderHashes = Array.from(this._dependentOrderHashes[makerAddress][makerToken]);
                     await this._emitRevalidateOrdersAsync(orderHashes);
                 }
                 break;
             }
-            case EtherTokenEvents.Withdrawal:
-            {
+            case EtherTokenEvents.Withdrawal: {
                 // Invalidate cache
                 const args = decodedLog.args as WithdrawalContractEventArgs;
                 this._balanceAndProxyAllowanceLazyStore.deleteBalance(decodedLog.address, args._owner);
                 // Revalidate orders
                 makerToken = decodedLog.address;
                 makerAddress = args._owner;
-                if (!_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
-                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])) {
+                if (
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress]) &&
+                    !_.isUndefined(this._dependentOrderHashes[makerAddress][makerToken])
+                ) {
                     const orderHashes = Array.from(this._dependentOrderHashes[makerAddress][makerToken]);
                     await this._emitRevalidateOrdersAsync(orderHashes);
                 }
                 break;
             }
-            case ExchangeEvents.LogFill:
-            {
+            case ExchangeEvents.LogFill: {
                 // Invalidate cache
                 const args = decodedLog.args as LogFillContractEventArgs;
                 this._orderFilledCancelledLazyStore.deleteFilledTakerAmount(args.orderHash);
@@ -289,8 +298,7 @@ export class OrderStateWatcher {
                 }
                 break;
             }
-            case ExchangeEvents.LogCancel:
-            {
+            case ExchangeEvents.LogCancel: {
                 // Invalidate cache
                 const args = decodedLog.args as LogCancelContractEventArgs;
                 this._orderFilledCancelledLazyStore.deleteCancelledTakerAmount(args.orderHash);
diff --git a/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts b/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts
index ddf3b763b..2200be0cb 100644
--- a/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts
+++ b/packages/0x.js/src/order_watcher/remaining_fillable_calculator.ts
@@ -1,6 +1,6 @@
-import {BigNumber} from 'bignumber.js';
+import { BigNumber } from 'bignumber.js';
 
-import {SignedOrder} from '../types';
+import { SignedOrder } from '../types';
 
 export class RemainingFillableCalculator {
     private _signedOrder: SignedOrder;
@@ -10,18 +10,21 @@ export class RemainingFillableCalculator {
     private _transferrableMakerFeeTokenAmount: BigNumber;
     private _remainingMakerTokenAmount: BigNumber;
     private _remainingMakerFeeAmount: BigNumber;
-    constructor(signedOrder: SignedOrder,
-                isMakerTokenZRX: boolean,
-                transferrableMakerTokenAmount: BigNumber,
-                transferrableMakerFeeTokenAmount: BigNumber,
-                remainingMakerTokenAmount: BigNumber) {
+    constructor(
+        signedOrder: SignedOrder,
+        isMakerTokenZRX: boolean,
+        transferrableMakerTokenAmount: BigNumber,
+        transferrableMakerFeeTokenAmount: BigNumber,
+        remainingMakerTokenAmount: BigNumber,
+    ) {
         this._signedOrder = signedOrder;
         this._isMakerTokenZRX = isMakerTokenZRX;
         this._transferrableMakerTokenAmount = transferrableMakerTokenAmount;
         this._transferrableMakerFeeTokenAmount = transferrableMakerFeeTokenAmount;
         this._remainingMakerTokenAmount = remainingMakerTokenAmount;
-        this._remainingMakerFeeAmount = remainingMakerTokenAmount.times(signedOrder.makerFee)
-                                                                .dividedToIntegerBy(signedOrder.makerTokenAmount);
+        this._remainingMakerFeeAmount = remainingMakerTokenAmount
+            .times(signedOrder.makerFee)
+            .dividedToIntegerBy(signedOrder.makerTokenAmount);
     }
     public computeRemainingMakerFillable(): BigNumber {
         if (this._hasSufficientFundsForFeeAndTransferAmount()) {
@@ -33,20 +36,24 @@ export class RemainingFillableCalculator {
         return this._calculatePartiallyFillableMakerTokenAmount();
     }
     public computeRemainingTakerFillable(): BigNumber {
-        return this.computeRemainingMakerFillable().times(this._signedOrder.takerTokenAmount)
-                                                   .dividedToIntegerBy(this._signedOrder.makerTokenAmount);
+        return this.computeRemainingMakerFillable()
+            .times(this._signedOrder.takerTokenAmount)
+            .dividedToIntegerBy(this._signedOrder.makerTokenAmount);
     }
     private _hasSufficientFundsForFeeAndTransferAmount(): boolean {
         if (this._isMakerTokenZRX) {
             const totalZRXTransferAmountRequired = this._remainingMakerTokenAmount.plus(this._remainingMakerFeeAmount);
             const hasSufficientFunds = this._transferrableMakerTokenAmount.greaterThanOrEqualTo(
-                                                                            totalZRXTransferAmountRequired);
+                totalZRXTransferAmountRequired,
+            );
             return hasSufficientFunds;
         } else {
             const hasSufficientFundsForTransferAmount = this._transferrableMakerTokenAmount.greaterThanOrEqualTo(
-                                                            this._remainingMakerTokenAmount);
+                this._remainingMakerTokenAmount,
+            );
             const hasSufficientFundsForFeeAmount = this._transferrableMakerFeeTokenAmount.greaterThanOrEqualTo(
-                                                       this._remainingMakerFeeAmount);
+                this._remainingMakerFeeAmount,
+            );
             const hasSufficientFunds = hasSufficientFundsForTransferAmount && hasSufficientFundsForFeeAmount;
             return hasSufficientFunds;
         }
@@ -57,8 +64,10 @@ export class RemainingFillableCalculator {
         // The number of times the maker can fill the order, if each fill only required the transfer of a single
         // baseUnit of fee tokens.
         // Given 2 ZRXwei, the maximum amount of times Maker can fill this order, in terms of fees, is 2
-        const fillableTimesInFeeTokenBaseUnits = BigNumber.min(this._transferrableMakerFeeTokenAmount,
-                                                               this._remainingMakerFeeAmount);
+        const fillableTimesInFeeTokenBaseUnits = BigNumber.min(
+            this._transferrableMakerFeeTokenAmount,
+            this._remainingMakerFeeAmount,
+        );
         // The number of times the Maker can fill the order, given the Maker Token Balance
         // Assuming a balance of 150 wei, and an orderToFeeRatio of 100:1, maker can fill this order 1 time.
         let fillableTimesInMakerTokenUnits = this._transferrableMakerTokenAmount.dividedBy(orderToFeeRatio);
@@ -68,20 +77,20 @@ export class RemainingFillableCalculator {
             const totalZRXTokenPooled = this._transferrableMakerTokenAmount;
             // The purchasing power here is less as the tokens are taken from the same Pool
             // For every one number of fills, we have to take an extra ZRX out of the pool
-            fillableTimesInMakerTokenUnits = totalZRXTokenPooled.dividedBy(
-                                                                     orderToFeeRatio.plus(new BigNumber(1)));
-
+            fillableTimesInMakerTokenUnits = totalZRXTokenPooled.dividedBy(orderToFeeRatio.plus(new BigNumber(1)));
         }
         // When Ratio is not fully divisible there can be remainders which cannot be represented, so they are floored.
         // This can result in a RoundingError being thrown by the Exchange Contract.
         const partiallyFillableMakerTokenAmount = fillableTimesInMakerTokenUnits
-                                                     .times(this._signedOrder.makerTokenAmount)
-                                                     .dividedToIntegerBy(this._signedOrder.makerFee);
+            .times(this._signedOrder.makerTokenAmount)
+            .dividedToIntegerBy(this._signedOrder.makerFee);
         const partiallyFillableFeeTokenAmount = fillableTimesInFeeTokenBaseUnits
-                                                     .times(this._signedOrder.makerTokenAmount)
-                                                     .dividedToIntegerBy(this._signedOrder.makerFee);
-        const partiallyFillableAmount = BigNumber.min(partiallyFillableMakerTokenAmount,
-                                                      partiallyFillableFeeTokenAmount);
+            .times(this._signedOrder.makerTokenAmount)
+            .dividedToIntegerBy(this._signedOrder.makerFee);
+        const partiallyFillableAmount = BigNumber.min(
+            partiallyFillableMakerTokenAmount,
+            partiallyFillableFeeTokenAmount,
+        );
         return partiallyFillableAmount;
     }
 }
diff --git a/packages/0x.js/src/schemas/zero_ex_config_schema.ts b/packages/0x.js/src/schemas/zero_ex_config_schema.ts
index e0d985749..546b1c2d0 100644
--- a/packages/0x.js/src/schemas/zero_ex_config_schema.ts
+++ b/packages/0x.js/src/schemas/zero_ex_config_schema.ts
@@ -5,9 +5,9 @@ export const zeroExConfigSchema = {
             type: 'number',
             minimum: 0,
         },
-        gasPrice: {$ref: '/Number'},
-        exchangeContractAddress: {$ref: '/Address'},
-        tokenRegistryContractAddress: {$ref: '/Address'},
+        gasPrice: { $ref: '/Number' },
+        exchangeContractAddress: { $ref: '/Address' },
+        tokenRegistryContractAddress: { $ref: '/Address' },
         orderWatcherConfig: {
             type: 'object',
             properties: {
diff --git a/packages/0x.js/src/stores/balance_proxy_allowance_lazy_store.ts b/packages/0x.js/src/stores/balance_proxy_allowance_lazy_store.ts
index ce93a70da..675c1afc0 100644
--- a/packages/0x.js/src/stores/balance_proxy_allowance_lazy_store.ts
+++ b/packages/0x.js/src/stores/balance_proxy_allowance_lazy_store.ts
@@ -1,8 +1,8 @@
-import {BigNumber} from 'bignumber.js';
+import { BigNumber } from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {BlockParamLiteral} from '../types';
+import { TokenWrapper } from '../contract_wrappers/token_wrapper';
+import { BlockParamLiteral } from '../types';
 
 /**
  * Copy on read store for balances/proxyAllowances of tokens/accounts
@@ -52,8 +52,10 @@ export class BalanceAndProxyAllowanceLazyStore {
         }
     }
     public async getProxyAllowanceAsync(tokenAddress: string, userAddress: string): Promise<BigNumber> {
-        if (_.isUndefined(this._proxyAllowance[tokenAddress]) ||
-            _.isUndefined(this._proxyAllowance[tokenAddress][userAddress])) {
+        if (
+            _.isUndefined(this._proxyAllowance[tokenAddress]) ||
+            _.isUndefined(this._proxyAllowance[tokenAddress][userAddress])
+        ) {
             const methodOpts = {
                 defaultBlock: this._defaultBlock,
             };
diff --git a/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts b/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts
index 54e260a8e..bb0619738 100644
--- a/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts
+++ b/packages/0x.js/src/stores/order_filled_cancelled_lazy_store.ts
@@ -1,8 +1,8 @@
-import {BigNumber} from 'bignumber.js';
+import { BigNumber } from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {BlockParamLiteral} from '../types';
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
+import { BlockParamLiteral } from '../types';
 
 /**
  * Copy on read store for filled/cancelled taker amounts
diff --git a/packages/0x.js/src/types.ts b/packages/0x.js/src/types.ts
index e6a2c05d0..9c06ae653 100644
--- a/packages/0x.js/src/types.ts
+++ b/packages/0x.js/src/types.ts
@@ -1,4 +1,4 @@
-import {TransactionReceipt} from '@0xproject/types';
+import { TransactionReceipt } from '@0xproject/types';
 import BigNumber from 'bignumber.js';
 import * as Web3 from 'web3';
 
@@ -42,8 +42,7 @@ export interface ECSignature {
 
 export type OrderAddresses = [string, string, string, string, string];
 
-export type OrderValues = [BigNumber, BigNumber, BigNumber,
-                           BigNumber, BigNumber, BigNumber];
+export type OrderValues = [BigNumber, BigNumber, BigNumber, BigNumber, BigNumber, BigNumber];
 
 export type LogEvent = Web3.LogEntryEvent;
 export interface DecodedLogEvent<ArgsType> {
@@ -51,7 +50,7 @@ export interface DecodedLogEvent<ArgsType> {
     log: LogWithDecodedArgs<ArgsType>;
 }
 
-export type EventCallback<ArgsType> = (err: null|Error, log?: DecodedLogEvent<ArgsType>) => void;
+export type EventCallback<ArgsType> = (err: null | Error, log?: DecodedLogEvent<ArgsType>) => void;
 export type EventWatcherCallback = (log: LogEvent) => void;
 
 export enum SolidityTypes {
@@ -136,7 +135,10 @@ export interface LogErrorContractEventArgs {
     errorId: BigNumber;
     orderHash: string;
 }
-export type ExchangeContractEventArgs = LogFillContractEventArgs|LogCancelContractEventArgs|LogErrorContractEventArgs;
+export type ExchangeContractEventArgs =
+    | LogFillContractEventArgs
+    | LogCancelContractEventArgs
+    | LogErrorContractEventArgs;
 export interface TransferContractEventArgs {
     _from: string;
     _to: string;
@@ -155,10 +157,13 @@ export interface WithdrawalContractEventArgs {
     _owner: string;
     _value: BigNumber;
 }
-export type TokenContractEventArgs = TransferContractEventArgs|ApprovalContractEventArgs;
-export type EtherTokenContractEventArgs = TokenContractEventArgs|DepositContractEventArgs|WithdrawalContractEventArgs;
-export type ContractEventArgs = ExchangeContractEventArgs|TokenContractEventArgs|EtherTokenContractEventArgs;
-export type ContractEventArg = string|BigNumber;
+export type TokenContractEventArgs = TransferContractEventArgs | ApprovalContractEventArgs;
+export type EtherTokenContractEventArgs =
+    | TokenContractEventArgs
+    | DepositContractEventArgs
+    | WithdrawalContractEventArgs;
+export type ContractEventArgs = ExchangeContractEventArgs | TokenContractEventArgs | EtherTokenContractEventArgs;
+export type ContractEventArg = string | BigNumber;
 
 export interface Order {
     maker: string;
@@ -211,14 +216,14 @@ export enum TokenEvents {
     Approval = 'Approval',
 }
 
-export enum EtherTokenEvents  {
+export enum EtherTokenEvents {
     Transfer = 'Transfer',
     Approval = 'Approval',
     Deposit = 'Deposit',
     Withdrawal = 'Withdrawal',
 }
 
-export type ContractEvents = TokenEvents|ExchangeEvents|EtherTokenEvents;
+export type ContractEvents = TokenEvents | ExchangeEvents | EtherTokenEvents;
 
 export interface IndexedFilterValues {
     [index: string]: ContractEventArg;
@@ -232,7 +237,7 @@ export enum BlockParamLiteral {
     Pending = 'pending',
 }
 
-export type BlockParam = BlockParamLiteral|number;
+export type BlockParam = BlockParamLiteral | number;
 
 export interface BlockRange {
     fromBlock: BlockParam;
@@ -242,7 +247,7 @@ export interface BlockRange {
 export type DoneCallback = (err?: Error) => void;
 
 export interface OrderCancellationRequest {
-    order: Order|SignedOrder;
+    order: Order | SignedOrder;
     takerTokenCancelAmount: BigNumber;
 }
 
@@ -312,10 +317,10 @@ export interface DecodedLogArgs {
 export interface LogWithDecodedArgs<ArgsType> extends Web3.DecodedLogEntry<ArgsType> {}
 
 export interface TransactionReceiptWithDecodedLogs extends TransactionReceipt {
-    logs: Array<LogWithDecodedArgs<DecodedLogArgs>|Web3.LogEntry>;
+    logs: Array<LogWithDecodedArgs<DecodedLogArgs> | Web3.LogEntry>;
 }
 
-export type ArtifactContractName = 'ZRX'|'TokenTransferProxy'|'TokenRegistry'|'Token'|'Exchange'|'EtherToken';
+export type ArtifactContractName = 'ZRX' | 'TokenTransferProxy' | 'TokenRegistry' | 'Token' | 'Exchange' | 'EtherToken';
 
 export interface Artifact {
     contract_name: ArtifactContractName;
@@ -399,7 +404,7 @@ export interface OrderStateInvalid {
     error: ExchangeContractErrs;
 }
 
-export type OrderState = OrderStateValid|OrderStateInvalid;
+export type OrderState = OrderStateValid | OrderStateInvalid;
 
 export type OnOrderStateChangeCallback = (orderState: OrderState) => void;
 // tslint:disable:max-file-line-count
diff --git a/packages/0x.js/src/utils/abi_decoder.ts b/packages/0x.js/src/utils/abi_decoder.ts
index 6d15f1d6f..2d4e92558 100644
--- a/packages/0x.js/src/utils/abi_decoder.ts
+++ b/packages/0x.js/src/utils/abi_decoder.ts
@@ -3,11 +3,11 @@ import * as _ from 'lodash';
 import * as Web3 from 'web3';
 import * as SolidityCoder from 'web3/lib/solidity/coder';
 
-import {AbiType, ContractEventArgs, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes} from '../types';
+import { AbiType, ContractEventArgs, DecodedLogArgs, LogWithDecodedArgs, RawLog, SolidityTypes } from '../types';
 
 export class AbiDecoder {
     private _savedABIs: Web3.AbiDefinition[] = [];
-    private _methodIds: {[signatureHash: string]: Web3.EventAbi} = {};
+    private _methodIds: { [signatureHash: string]: Web3.EventAbi } = {};
     private static _padZeros(address: string) {
         let formatted = address;
         if (_.startsWith(formatted, '0x')) {
@@ -22,7 +22,8 @@ export class AbiDecoder {
     }
     // This method can only decode logs from the 0x & ERC20 smart contracts
     public tryToDecodeLogOrNoop<ArgsType extends ContractEventArgs>(
-        log: Web3.LogEntry): LogWithDecodedArgs<ArgsType>|RawLog {
+        log: Web3.LogEntry,
+    ): LogWithDecodedArgs<ArgsType> | RawLog {
         const methodId = log.topics[0];
         const event = this._methodIds[methodId];
         if (_.isUndefined(event)) {
@@ -42,9 +43,11 @@ export class AbiDecoder {
             let value = param.indexed ? log.topics[topicsIndex++] : decodedData[dataIndex++];
             if (param.type === SolidityTypes.Address) {
                 value = AbiDecoder._padZeros(new BigNumber(value).toString(16));
-            } else if (param.type === SolidityTypes.Uint256 ||
-                       param.type === SolidityTypes.Uint8 ||
-                       param.type === SolidityTypes.Uint) {
+            } else if (
+                param.type === SolidityTypes.Uint256 ||
+                param.type === SolidityTypes.Uint8 ||
+                param.type === SolidityTypes.Uint
+            ) {
                 value = new BigNumber(value);
             }
             decodedParams[param.name] = value;
diff --git a/packages/0x.js/src/utils/assert.ts b/packages/0x.js/src/utils/assert.ts
index 86a6a7c01..b391a3347 100644
--- a/packages/0x.js/src/utils/assert.ts
+++ b/packages/0x.js/src/utils/assert.ts
@@ -1,14 +1,14 @@
-import {assert as sharedAssert} from '@0xproject/assert';
+import { assert as sharedAssert } from '@0xproject/assert';
 // We need those two unused imports because they're actually used by sharedAssert which gets injected here
 // tslint:disable-next-line:no-unused-variable
-import {Schema} from '@0xproject/json-schemas';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { Schema } from '@0xproject/json-schemas';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 // tslint:disable-next-line:no-unused-variable
 import * as BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {ECSignature} from '../types';
-import {signatureUtils} from '../utils/signature_utils';
+import { ECSignature } from '../types';
+import { signatureUtils } from '../utils/signature_utils';
 
 export const assert = {
     ...sharedAssert,
@@ -16,11 +16,15 @@ export const assert = {
         const isValidSignature = signatureUtils.isValidSignature(orderHash, ecSignature, signerAddress);
         this.assert(isValidSignature, `Expected order with hash '${orderHash}' to have a valid signature`);
     },
-    async isSenderAddressAsync(variableName: string, senderAddressHex: string,
-                               web3Wrapper: Web3Wrapper): Promise<void> {
+    async isSenderAddressAsync(
+        variableName: string,
+        senderAddressHex: string,
+        web3Wrapper: Web3Wrapper,
+    ): Promise<void> {
         sharedAssert.isETHAddressHex(variableName, senderAddressHex);
         const isSenderAddressAvailable = await web3Wrapper.isSenderAddressAvailableAsync(senderAddressHex);
-        sharedAssert.assert(isSenderAddressAvailable,
+        sharedAssert.assert(
+            isSenderAddressAvailable,
             `Specified ${variableName} ${senderAddressHex} isn't available through the supplied web3 provider`,
         );
     },
diff --git a/packages/0x.js/src/utils/decorators.ts b/packages/0x.js/src/utils/decorators.ts
index 2a823b9ac..f774d734e 100644
--- a/packages/0x.js/src/utils/decorators.ts
+++ b/packages/0x.js/src/utils/decorators.ts
@@ -1,8 +1,8 @@
 import * as _ from 'lodash';
 
-import {AsyncMethod, SyncMethod, ZeroExError} from '../types';
+import { AsyncMethod, SyncMethod, ZeroExError } from '../types';
 
-import {constants} from './constants';
+import { constants } from './constants';
 
 type ErrorTransformer = (err: Error) => Error;
 
@@ -18,8 +18,8 @@ const contractCallErrorTransformer = (error: Error) => {
 
 const schemaErrorTransformer = (error: Error) => {
     if (_.includes(error.message, constants.INVALID_TAKER_FORMAT)) {
-        // tslint:disable-next-line:max-line-length
-        const errMsg = 'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
+        const errMsg =
+            'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
         return new Error(errMsg);
     }
     return error;
@@ -30,14 +30,16 @@ const schemaErrorTransformer = (error: Error) => {
  */
 const asyncErrorHandlerFactory = (errorTransformer: ErrorTransformer) => {
     const asyncErrorHandlingDecorator = (
-        target: object, key: string|symbol, descriptor: TypedPropertyDescriptor<AsyncMethod>,
+        target: object,
+        key: string | symbol,
+        descriptor: TypedPropertyDescriptor<AsyncMethod>,
     ) => {
-        const originalMethod = (descriptor.value as 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[]) {
+        descriptor.value = async function(...args: any[]) {
             try {
                 const result = await originalMethod.apply(this, args);
                 return result;
@@ -55,9 +57,11 @@ const asyncErrorHandlerFactory = (errorTransformer: ErrorTransformer) => {
 
 const syncErrorHandlerFactory = (errorTransformer: ErrorTransformer) => {
     const syncErrorHandlingDecorator = (
-        target: object, key: string|symbol, descriptor: TypedPropertyDescriptor<SyncMethod>,
+        target: object,
+        key: string | symbol,
+        descriptor: TypedPropertyDescriptor<SyncMethod>,
     ) => {
-        const originalMethod = (descriptor.value as SyncMethod);
+        const originalMethod = descriptor.value as SyncMethod;
 
         // Do not use arrow syntax here. Use a function expression in
         // order to use the correct value of `this` in this method
diff --git a/packages/0x.js/src/utils/exchange_transfer_simulator.ts b/packages/0x.js/src/utils/exchange_transfer_simulator.ts
index 8143112aa..575a2d3d2 100644
--- a/packages/0x.js/src/utils/exchange_transfer_simulator.ts
+++ b/packages/0x.js/src/utils/exchange_transfer_simulator.ts
@@ -1,9 +1,9 @@
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {TokenWrapper} from '../contract_wrappers/token_wrapper';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-import {BlockParamLiteral, ExchangeContractErrs, TradeSide, TransferType} from '../types';
+import { TokenWrapper } from '../contract_wrappers/token_wrapper';
+import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
+import { BlockParamLiteral, ExchangeContractErrs, TradeSide, TransferType } from '../types';
 
 enum FailureReason {
     Balance = 'balance',
@@ -36,8 +36,11 @@ const ERR_MSG_MAPPING = {
 export class ExchangeTransferSimulator {
     private _store: BalanceAndProxyAllowanceLazyStore;
     private _UNLIMITED_ALLOWANCE_IN_BASE_UNITS: BigNumber;
-    private static _throwValidationError(failureReason: FailureReason, tradeSide: TradeSide,
-                                         transferType: TransferType): never {
+    private static _throwValidationError(
+        failureReason: FailureReason,
+        tradeSide: TradeSide,
+        transferType: TransferType,
+    ): never {
         const errMsg = ERR_MSG_MAPPING[failureReason][tradeSide][transferType];
         throw new Error(errMsg);
     }
@@ -54,9 +57,14 @@ export class ExchangeTransferSimulator {
      * @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> {
+    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)) {
@@ -69,20 +77,29 @@ export class ExchangeTransferSimulator {
         await this._decreaseBalanceAsync(tokenAddress, from, amountInBaseUnits);
         await this._increaseBalanceAsync(tokenAddress, to, amountInBaseUnits);
     }
-    private async _decreaseProxyAllowanceAsync(tokenAddress: string, userAddress: string,
-                                               amountInBaseUnits: BigNumber): Promise<void> {
+    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> {
+    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> {
+    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));
     }
diff --git a/packages/0x.js/src/utils/filter_utils.ts b/packages/0x.js/src/utils/filter_utils.ts
index 65161c33e..97205ace3 100644
--- a/packages/0x.js/src/utils/filter_utils.ts
+++ b/packages/0x.js/src/utils/filter_utils.ts
@@ -4,7 +4,7 @@ import * as _ from 'lodash';
 import * as uuid from 'uuid/v4';
 import * as Web3 from 'web3';
 
-import {BlockRange, ContractEvents, IndexedFilterValues} from '../types';
+import { BlockRange, ContractEvents, IndexedFilterValues } from '../types';
 
 const TOPIC_LENGTH = 32;
 
@@ -12,10 +12,14 @@ export const filterUtils = {
     generateUUID(): string {
         return uuid();
     },
-    getFilter(address: string, eventName: ContractEvents,
-              indexFilterValues: IndexedFilterValues, abi: Web3.ContractAbi,
-              blockRange?: BlockRange): Web3.FilterObject {
-        const eventAbi = _.find(abi, {name: eventName}) as Web3.EventAbi;
+    getFilter(
+        address: string,
+        eventName: ContractEvents,
+        indexFilterValues: IndexedFilterValues,
+        abi: Web3.ContractAbi,
+        blockRange?: BlockRange,
+    ): 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);
@@ -37,8 +41,8 @@ export const filterUtils = {
         const signature = `${eventAbi.name}(${types.join(',')})`;
         return signature;
     },
-    getTopicsForIndexedArgs(abi: Web3.EventAbi, indexFilterValues: IndexedFilterValues): Array<string|null> {
-        const topics: Array<string|null> = [];
+    getTopicsForIndexedArgs(abi: Web3.EventAbi, indexFilterValues: IndexedFilterValues): Array<string | null> {
+        const topics: Array<string | null> = [];
         for (const eventInput of abi.inputs) {
             if (!eventInput.indexed) {
                 continue;
@@ -65,12 +69,12 @@ export const filterUtils = {
         }
         return true;
     },
-    matchesTopics(logTopics: string[], filterTopics: Array<string[]|string|null>): boolean {
+    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 {
+    matchesTopic(logTopic: string, filterTopic: string[] | string | null): boolean {
         if (_.isArray(filterTopic)) {
             return _.includes(filterTopic, logTopic);
         }
diff --git a/packages/0x.js/src/utils/order_state_utils.ts b/packages/0x.js/src/utils/order_state_utils.ts
index 981f9e96c..5674528d5 100644
--- a/packages/0x.js/src/utils/order_state_utils.ts
+++ b/packages/0x.js/src/utils/order_state_utils.ts
@@ -1,11 +1,11 @@
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {ZeroEx} from '../0x';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {RemainingFillableCalculator} from '../order_watcher/remaining_fillable_calculator';
-import {BalanceAndProxyAllowanceLazyStore} from '../stores/balance_proxy_allowance_lazy_store';
-import {OrderFilledCancelledLazyStore} from '../stores/order_filled_cancelled_lazy_store';
+import { ZeroEx } from '../0x';
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
+import { RemainingFillableCalculator } from '../order_watcher/remaining_fillable_calculator';
+import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store';
+import { OrderFilledCancelledLazyStore } from '../stores/order_filled_cancelled_lazy_store';
 import {
     ExchangeContractErrs,
     OrderRelevantState,
@@ -44,15 +44,20 @@ export class OrderStateUtils {
             }
         }
         const minFillableTakerTokenAmountWithinNoRoundingErrorRange = signedOrder.takerTokenAmount
-                                                                      .dividedBy(ACCEPTABLE_RELATIVE_ROUNDING_ERROR)
-                                                                      .dividedBy(signedOrder.makerTokenAmount);
-        if (orderRelevantState.remainingFillableTakerTokenAmount
-            .lessThan(minFillableTakerTokenAmountWithinNoRoundingErrorRange)) {
+            .dividedBy(ACCEPTABLE_RELATIVE_ROUNDING_ERROR)
+            .dividedBy(signedOrder.makerTokenAmount);
+        if (
+            orderRelevantState.remainingFillableTakerTokenAmount.lessThan(
+                minFillableTakerTokenAmountWithinNoRoundingErrorRange,
+            )
+        ) {
             throw new Error(ExchangeContractErrs.OrderFillRoundingError);
         }
     }
-    constructor(balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore,
-                orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore) {
+    constructor(
+        balanceAndProxyAllowanceLazyStore: BalanceAndProxyAllowanceLazyStore,
+        orderFilledCancelledLazyStore: OrderFilledCancelledLazyStore,
+    ) {
         this._balanceAndProxyAllowanceLazyStore = balanceAndProxyAllowanceLazyStore;
         this._orderFilledCancelledLazyStore = orderFilledCancelledLazyStore;
     }
@@ -85,16 +90,20 @@ export class OrderStateUtils {
         const zrxTokenAddress = exchange.getZRXTokenAddress();
         const orderHash = ZeroEx.getOrderHashHex(signedOrder);
         const makerBalance = await this._balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker,
+            signedOrder.makerTokenAddress,
+            signedOrder.maker,
         );
         const makerProxyAllowance = await this._balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker,
+            signedOrder.makerTokenAddress,
+            signedOrder.maker,
         );
         const makerFeeBalance = await this._balanceAndProxyAllowanceLazyStore.getBalanceAsync(
-            zrxTokenAddress, signedOrder.maker,
+            zrxTokenAddress,
+            signedOrder.maker,
         );
         const makerFeeProxyAllowance = await this._balanceAndProxyAllowanceLazyStore.getProxyAllowanceAsync(
-            zrxTokenAddress, signedOrder.maker,
+            zrxTokenAddress,
+            signedOrder.maker,
         );
         const filledTakerTokenAmount = await this._orderFilledCancelledLazyStore.getFilledTakerAmountAsync(orderHash);
         const cancelledTakerTokenAmount = await this._orderFilledCancelledLazyStore.getCancelledTakerAmountAsync(
@@ -104,17 +113,20 @@ export class OrderStateUtils {
         const totalMakerTokenAmount = signedOrder.makerTokenAmount;
         const totalTakerTokenAmount = signedOrder.takerTokenAmount;
         const remainingTakerTokenAmount = totalTakerTokenAmount.minus(unavailableTakerTokenAmount);
-        const remainingMakerTokenAmount = remainingTakerTokenAmount.times(totalMakerTokenAmount)
-                                                                   .dividedToIntegerBy(totalTakerTokenAmount);
+        const remainingMakerTokenAmount = remainingTakerTokenAmount
+            .times(totalMakerTokenAmount)
+            .dividedToIntegerBy(totalTakerTokenAmount);
         const transferrableMakerTokenAmount = BigNumber.min([makerProxyAllowance, makerBalance]);
         const transferrableFeeTokenAmount = BigNumber.min([makerFeeProxyAllowance, makerFeeBalance]);
 
         const isMakerTokenZRX = signedOrder.makerTokenAddress === zrxTokenAddress;
-        const remainingFillableCalculator = new RemainingFillableCalculator(signedOrder,
-                                                isMakerTokenZRX,
-                                                transferrableMakerTokenAmount,
-                                                transferrableFeeTokenAmount,
-                                                remainingMakerTokenAmount);
+        const remainingFillableCalculator = new RemainingFillableCalculator(
+            signedOrder,
+            isMakerTokenZRX,
+            transferrableMakerTokenAmount,
+            transferrableFeeTokenAmount,
+            remainingMakerTokenAmount,
+        );
         const remainingFillableMakerTokenAmount = remainingFillableCalculator.computeRemainingMakerFillable();
         const remainingFillableTakerTokenAmount = remainingFillableCalculator.computeRemainingTakerFillable();
         const orderRelevantState = {
diff --git a/packages/0x.js/src/utils/order_validation_utils.ts b/packages/0x.js/src/utils/order_validation_utils.ts
index ad82d85b4..ebe4c49df 100644
--- a/packages/0x.js/src/utils/order_validation_utils.ts
+++ b/packages/0x.js/src/utils/order_validation_utils.ts
@@ -1,18 +1,20 @@
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {ZeroEx} from '../0x';
-import {ExchangeWrapper} from '../contract_wrappers/exchange_wrapper';
-import {ExchangeContractErrs, Order, SignedOrder, TradeSide, TransferType, ZeroExError} from '../types';
-import {constants} from '../utils/constants';
-import {utils} from '../utils/utils';
+import { ZeroEx } from '../0x';
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
+import { ExchangeContractErrs, Order, SignedOrder, TradeSide, TransferType, ZeroExError } from '../types';
+import { constants } from '../utils/constants';
+import { utils } from '../utils/utils';
 
-import {ExchangeTransferSimulator} from './exchange_transfer_simulator';
+import { ExchangeTransferSimulator } from './exchange_transfer_simulator';
 
 export class OrderValidationUtils {
     private _exchangeWrapper: ExchangeWrapper;
     public static validateCancelOrderThrowIfInvalid(
-        order: Order, cancelTakerTokenAmount: BigNumber, unavailableTakerTokenAmount: BigNumber,
+        order: Order,
+        cancelTakerTokenAmount: BigNumber,
+        unavailableTakerTokenAmount: BigNumber,
     ): void {
         if (cancelTakerTokenAmount.eq(0)) {
             throw new Error(ExchangeContractErrs.OrderCancelAmountZero);
@@ -26,8 +28,11 @@ export class OrderValidationUtils {
         }
     }
     public static async validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder,
-        fillTakerTokenAmount: BigNumber, senderAddress: string, zrxTokenAddress: string,
+        exchangeTradeEmulator: ExchangeTransferSimulator,
+        signedOrder: SignedOrder,
+        fillTakerTokenAmount: BigNumber,
+        senderAddress: string,
+        zrxTokenAddress: string,
     ): Promise<void> {
         const fillMakerTokenAmount = OrderValidationUtils._getPartialAmount(
             fillTakerTokenAmount,
@@ -35,12 +40,20 @@ export class OrderValidationUtils {
             signedOrder.makerTokenAmount,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker, senderAddress, fillMakerTokenAmount,
-            TradeSide.Maker, TransferType.Trade,
+            signedOrder.makerTokenAddress,
+            signedOrder.maker,
+            senderAddress,
+            fillMakerTokenAmount,
+            TradeSide.Maker,
+            TransferType.Trade,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.takerTokenAddress, senderAddress, signedOrder.maker, fillTakerTokenAmount,
-            TradeSide.Taker, TransferType.Trade,
+            signedOrder.takerTokenAddress,
+            senderAddress,
+            signedOrder.maker,
+            fillTakerTokenAmount,
+            TradeSide.Taker,
+            TransferType.Trade,
         );
         const makerFeeAmount = OrderValidationUtils._getPartialAmount(
             fillTakerTokenAmount,
@@ -48,7 +61,11 @@ export class OrderValidationUtils {
             signedOrder.makerFee,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, signedOrder.maker, signedOrder.feeRecipient, makerFeeAmount, TradeSide.Maker,
+            zrxTokenAddress,
+            signedOrder.maker,
+            signedOrder.feeRecipient,
+            makerFeeAmount,
+            TradeSide.Maker,
             TransferType.Fee,
         );
         const takerFeeAmount = OrderValidationUtils._getPartialAmount(
@@ -57,12 +74,17 @@ export class OrderValidationUtils {
             signedOrder.takerFee,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, senderAddress, signedOrder.feeRecipient, takerFeeAmount, TradeSide.Taker,
+            zrxTokenAddress,
+            senderAddress,
+            signedOrder.feeRecipient,
+            takerFeeAmount,
+            TradeSide.Taker,
             TransferType.Fee,
         );
     }
     private static _validateRemainingFillAmountNotZeroOrThrow(
-        takerTokenAmount: BigNumber, unavailableTakerTokenAmount: BigNumber,
+        takerTokenAmount: BigNumber,
+        unavailableTakerTokenAmount: BigNumber,
     ) {
         if (takerTokenAmount.eq(unavailableTakerTokenAmount)) {
             throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero);
@@ -74,24 +96,27 @@ export class OrderValidationUtils {
             throw new Error(ExchangeContractErrs.OrderFillExpired);
         }
     }
-    private static _getPartialAmount(numerator: BigNumber, denominator: BigNumber,
-                                     target: BigNumber): BigNumber {
+    private static _getPartialAmount(numerator: BigNumber, denominator: BigNumber, target: BigNumber): BigNumber {
         const fillMakerTokenAmount = numerator
-                                     .mul(target)
-                                     .div(denominator)
-                                     .round(0);
+            .mul(target)
+            .div(denominator)
+            .round(0);
         return fillMakerTokenAmount;
     }
     constructor(exchangeWrapper: ExchangeWrapper) {
         this._exchangeWrapper = exchangeWrapper;
     }
     public async validateOrderFillableOrThrowAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder, zrxTokenAddress: string,
-        expectedFillTakerTokenAmount?: BigNumber): Promise<void> {
+        exchangeTradeEmulator: ExchangeTransferSimulator,
+        signedOrder: SignedOrder,
+        zrxTokenAddress: string,
+        expectedFillTakerTokenAmount?: BigNumber,
+    ): Promise<void> {
         const orderHash = utils.getOrderHashHex(signedOrder);
         const unavailableTakerTokenAmount = await this._exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
         OrderValidationUtils._validateRemainingFillAmountNotZeroOrThrow(
-            signedOrder.takerTokenAmount, unavailableTakerTokenAmount,
+            signedOrder.takerTokenAmount,
+            unavailableTakerTokenAmount,
         );
         OrderValidationUtils._validateOrderNotExpiredOrThrow(signedOrder.expirationUnixTimestampSec);
         let fillTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
@@ -104,8 +129,12 @@ export class OrderValidationUtils {
             signedOrder.makerTokenAmount,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            signedOrder.makerTokenAddress, signedOrder.maker, signedOrder.taker, fillMakerTokenAmount,
-            TradeSide.Maker, TransferType.Trade,
+            signedOrder.makerTokenAddress,
+            signedOrder.maker,
+            signedOrder.taker,
+            fillMakerTokenAmount,
+            TradeSide.Maker,
+            TransferType.Trade,
         );
         const makerFeeAmount = OrderValidationUtils._getPartialAmount(
             fillTakerTokenAmount,
@@ -113,14 +142,21 @@ export class OrderValidationUtils {
             signedOrder.makerFee,
         );
         await exchangeTradeEmulator.transferFromAsync(
-            zrxTokenAddress, signedOrder.maker, signedOrder.feeRecipient, makerFeeAmount,
-            TradeSide.Maker, TransferType.Fee,
+            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> {
+        exchangeTradeEmulator: ExchangeTransferSimulator,
+        signedOrder: SignedOrder,
+        fillTakerTokenAmount: BigNumber,
+        takerAddress: string,
+        zrxTokenAddress: string,
+    ): Promise<BigNumber> {
         if (fillTakerTokenAmount.eq(0)) {
             throw new Error(ExchangeContractErrs.OrderFillAmountZero);
         }
@@ -130,22 +166,29 @@ export class OrderValidationUtils {
         }
         const unavailableTakerTokenAmount = await this._exchangeWrapper.getUnavailableTakerAmountAsync(orderHash);
         OrderValidationUtils._validateRemainingFillAmountNotZeroOrThrow(
-            signedOrder.takerTokenAmount, unavailableTakerTokenAmount,
+            signedOrder.takerTokenAmount,
+            unavailableTakerTokenAmount,
         );
         if (signedOrder.taker !== constants.NULL_ADDRESS && signedOrder.taker !== takerAddress) {
             throw new Error(ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker);
         }
         OrderValidationUtils._validateOrderNotExpiredOrThrow(signedOrder.expirationUnixTimestampSec);
         const remainingTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount);
-        const filledTakerTokenAmount = remainingTakerTokenAmount.lessThan(fillTakerTokenAmount) ?
-                                       remainingTakerTokenAmount :
-                                       fillTakerTokenAmount;
+        const filledTakerTokenAmount = remainingTakerTokenAmount.lessThan(fillTakerTokenAmount)
+            ? remainingTakerTokenAmount
+            : fillTakerTokenAmount;
         await OrderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, filledTakerTokenAmount, takerAddress, zrxTokenAddress,
+            exchangeTradeEmulator,
+            signedOrder,
+            filledTakerTokenAmount,
+            takerAddress,
+            zrxTokenAddress,
         );
 
         const wouldRoundingErrorOccur = await this._exchangeWrapper.isRoundingErrorAsync(
-            filledTakerTokenAmount, signedOrder.takerTokenAmount, signedOrder.makerTokenAmount,
+            filledTakerTokenAmount,
+            signedOrder.takerTokenAmount,
+            signedOrder.makerTokenAmount,
         );
         if (wouldRoundingErrorOccur) {
             throw new Error(ExchangeContractErrs.OrderFillRoundingError);
@@ -153,10 +196,18 @@ export class OrderValidationUtils {
         return filledTakerTokenAmount;
     }
     public async validateFillOrKillOrderThrowIfInvalidAsync(
-        exchangeTradeEmulator: ExchangeTransferSimulator, signedOrder: SignedOrder,
-        fillTakerTokenAmount: BigNumber, takerAddress: string, zrxTokenAddress: string): Promise<void> {
+        exchangeTradeEmulator: ExchangeTransferSimulator,
+        signedOrder: SignedOrder,
+        fillTakerTokenAmount: BigNumber,
+        takerAddress: string,
+        zrxTokenAddress: string,
+    ): Promise<void> {
         const filledTakerTokenAmount = await this.validateFillOrderThrowIfInvalidAsync(
-            exchangeTradeEmulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress,
+            exchangeTradeEmulator,
+            signedOrder,
+            fillTakerTokenAmount,
+            takerAddress,
+            zrxTokenAddress,
         );
         if (filledTakerTokenAmount !== fillTakerTokenAmount) {
             throw new Error(ExchangeContractErrs.InsufficientRemainingFillAmount);
diff --git a/packages/0x.js/src/utils/signature_utils.ts b/packages/0x.js/src/utils/signature_utils.ts
index aaf04e7b0..b0f1d61ef 100644
--- a/packages/0x.js/src/utils/signature_utils.ts
+++ b/packages/0x.js/src/utils/signature_utils.ts
@@ -1,6 +1,6 @@
 import * as ethUtil from 'ethereumjs-util';
 
-import {ECSignature} from '../types';
+import { ECSignature } from '../types';
 
 export const signatureUtils = {
     isValidSignature(data: string, signature: ECSignature, signerAddress: string): boolean {
@@ -11,7 +11,8 @@ export const signatureUtils = {
                 msgHashBuff,
                 signature.v,
                 ethUtil.toBuffer(signature.r),
-                ethUtil.toBuffer(signature.s));
+                ethUtil.toBuffer(signature.s),
+            );
             const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
             return retrievedAddress === signerAddress;
         } catch (err) {
@@ -34,7 +35,7 @@ export const signatureUtils = {
         return ecSignature;
     },
     parseSignatureHexAsRSV(signatureHex: string): ECSignature {
-        const {v, r, s} = ethUtil.fromRpcSig(signatureHex);
+        const { v, r, s } = ethUtil.fromRpcSig(signatureHex);
         const ecSignature: ECSignature = {
             v,
             r: ethUtil.bufferToHex(r),
diff --git a/packages/0x.js/src/utils/utils.ts b/packages/0x.js/src/utils/utils.ts
index 04ae34aac..09de6ce52 100644
--- a/packages/0x.js/src/utils/utils.ts
+++ b/packages/0x.js/src/utils/utils.ts
@@ -4,7 +4,7 @@ import * as ethABI from 'ethereumjs-abi';
 import * as ethUtil from 'ethereumjs-util';
 import * as _ from 'lodash';
 
-import {Order, SignedOrder, SolidityTypes} from '../types';
+import { Order, SignedOrder, SolidityTypes } from '../types';
 
 export const utils = {
     /**
@@ -29,20 +29,35 @@ export const utils = {
     spawnSwitchErr(name: string, value: any): Error {
         return new Error(`Unexpected switch value: ${value} encountered for ${name}`);
     },
-    getOrderHashHex(order: Order|SignedOrder): string {
+    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},
+            { 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);
diff --git a/packages/0x.js/test/0x.js_test.ts b/packages/0x.js/test/0x.js_test.ts
index 245946a89..238cca00b 100644
--- a/packages/0x.js/test/0x.js_test.ts
+++ b/packages/0x.js/test/0x.js_test.ts
@@ -1,16 +1,16 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
 import * as Sinon from 'sinon';
 
-import {ApprovalContractEventArgs, LogWithDecodedArgs, Order, TokenEvents, ZeroEx} from '../src';
+import { ApprovalContractEventArgs, LogWithDecodedArgs, Order, TokenEvents, ZeroEx } from '../src';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 const blockchainLifecycle = new BlockchainLifecycle(constants.RPC_URL);
 chaiSetup.configure();
@@ -41,11 +41,11 @@ describe('ZeroEx library', () => {
 
             // Check that all nested web3 wrapper instances return the updated provider
             const nestedWeb3WrapperProvider = (zeroEx as any)._web3Wrapper.getCurrentProvider();
-            expect((nestedWeb3WrapperProvider).zeroExTestId).to.be.a('number');
+            expect(nestedWeb3WrapperProvider.zeroExTestId).to.be.a('number');
             const exchangeWeb3WrapperProvider = (zeroEx.exchange as any)._web3Wrapper.getCurrentProvider();
-            expect((exchangeWeb3WrapperProvider).zeroExTestId).to.be.a('number');
+            expect(exchangeWeb3WrapperProvider.zeroExTestId).to.be.a('number');
             const tokenRegistryWeb3WrapperProvider = (zeroEx.tokenRegistry as any)._web3Wrapper.getCurrentProvider();
-            expect((tokenRegistryWeb3WrapperProvider).zeroExTestId).to.be.a('number');
+            expect(tokenRegistryWeb3WrapperProvider.zeroExTestId).to.be.a('number');
         });
     });
     describe('#isValidSignature', () => {
@@ -58,22 +58,25 @@ describe('ZeroEx library', () => {
             s: '0x40349190569279751135161d22529dc25add4f6069af05be04cacbda2ace2254',
         };
         const address = '0x5409ed021d9299bf6814279a6a1411a7e866a631';
-        it('should return false if the data doesn\'t pertain to the signature & address', async () => {
+        it("should return false if the data doesn't pertain to the signature & address", async () => {
             expect(ZeroEx.isValidSignature('0x0', signature, address)).to.be.false();
             return expect(
                 (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync('0x0', signature, address),
             ).to.become(false);
         });
-        it('should return false if the address doesn\'t pertain to the signature & data', async () => {
+        it("should return false if the address doesn't pertain to the signature & data", async () => {
             const validUnrelatedAddress = '0x8b0292b11a196601ed2ce54b665cafeca0347d42';
             expect(ZeroEx.isValidSignature(dataHex, signature, validUnrelatedAddress)).to.be.false();
             return expect(
-                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(dataHex, signature,
-                                                                                validUnrelatedAddress),
+                (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(
+                    dataHex,
+                    signature,
+                    validUnrelatedAddress,
+                ),
             ).to.become(false);
         });
-        it('should return false if the signature doesn\'t pertain to the dataHex & address', async () => {
-            const wrongSignature = _.assign({}, signature, {v: 28});
+        it("should return false if the signature doesn't pertain to the dataHex & address", async () => {
+            const wrongSignature = _.assign({}, signature, { v: 28 });
             expect(ZeroEx.isValidSignature(dataHex, wrongSignature, address)).to.be.false();
             return expect(
                 (zeroEx.exchange as any)._isValidSignatureUsingContractCallAsync(dataHex, wrongSignature, address),
@@ -117,8 +120,9 @@ describe('ZeroEx library', () => {
         it('should throw if invalid baseUnit amount supplied as argument', () => {
             const invalidBaseUnitAmount = new BigNumber(1000000000.4);
             const decimals = 6;
-            expect(() => ZeroEx.toUnitAmount(invalidBaseUnitAmount, decimals))
-                .to.throw('amount should be in baseUnits (no decimals), found value: 1000000000.4');
+            expect(() => ZeroEx.toUnitAmount(invalidBaseUnitAmount, decimals)).to.throw(
+                'amount should be in baseUnits (no decimals), found value: 1000000000.4',
+            );
         });
         it('Should return the expected unit amount for the decimals passed in', () => {
             const baseUnitAmount = new BigNumber(1000000000);
@@ -139,8 +143,9 @@ describe('ZeroEx library', () => {
         it('should throw if unitAmount has more decimals then specified as the max decimal precision', () => {
             const unitAmount = new BigNumber(0.823091);
             const decimals = 5;
-            expect(() => ZeroEx.toBaseUnitAmount(unitAmount, decimals))
-                .to.throw('Invalid unit amount: 0.823091 - Too many decimal places');
+            expect(() => ZeroEx.toBaseUnitAmount(unitAmount, decimals)).to.throw(
+                'Invalid unit amount: 0.823091 - Too many decimal places',
+            );
         });
     });
     describe('#getOrderHashHex', () => {
@@ -167,10 +172,10 @@ describe('ZeroEx library', () => {
         it('throws a readable error message if taker format is invalid', async () => {
             const orderWithInvalidtakerFormat = {
                 ...order,
-                taker: null as any as string,
+                taker: (null as any) as string,
             };
-            // tslint:disable-next-line:max-line-length
-            const expectedErrorMessage = 'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
+            const expectedErrorMessage =
+                'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
             expect(() => ZeroEx.getOrderHashHex(orderWithInvalidtakerFormat)).to.throw(expectedErrorMessage);
         });
     });
@@ -198,16 +203,15 @@ describe('ZeroEx library', () => {
         });
         it('should return the correct ECSignature for signatureHex concatenated as R + S + V', async () => {
             const orderHash = '0x34decbedc118904df65f379a175bb39ca18209d6ce41d5ed549d54e6e0a95004';
-            // tslint:disable-next-line: max-line-length
-            const signature = '0x22109d11d79cb8bf96ed88625e1cd9558800c4073332a9a02857499883ee5ce3050aa3cc1f2c435e67e114cdce54b9527b4f50548342401bc5d2b77adbdacb021b';
+            const signature =
+                '0x22109d11d79cb8bf96ed88625e1cd9558800c4073332a9a02857499883ee5ce3050aa3cc1f2c435e67e114cdce54b9527b4f50548342401bc5d2b77adbdacb021b';
             const expectedECSignature = {
                 v: 27,
                 r: '0x22109d11d79cb8bf96ed88625e1cd9558800c4073332a9a02857499883ee5ce3',
                 s: '0x050aa3cc1f2c435e67e114cdce54b9527b4f50548342401bc5d2b77adbdacb02',
             };
             stubs = [
-                Sinon.stub((zeroEx as any)._web3Wrapper, 'signTransactionAsync')
-                    .returns(Promise.resolve(signature)),
+                Sinon.stub((zeroEx as any)._web3Wrapper, 'signTransactionAsync').returns(Promise.resolve(signature)),
                 Sinon.stub(ZeroEx, 'isValidSignature').returns(true),
             ];
 
@@ -216,16 +220,15 @@ describe('ZeroEx library', () => {
         });
         it('should return the correct ECSignature for signatureHex concatenated as V + R + S', async () => {
             const orderHash = '0xc793e33ffded933b76f2f48d9aa3339fc090399d5e7f5dec8d3660f5480793f7';
-            // tslint:disable-next-line: max-line-length
-            const signature = '0x1bc80bedc6756722672753413efdd749b5adbd4fd552595f59c13427407ee9aee02dea66f25a608bbae457e020fb6decb763deb8b7192abab624997242da248960';
+            const signature =
+                '0x1bc80bedc6756722672753413efdd749b5adbd4fd552595f59c13427407ee9aee02dea66f25a608bbae457e020fb6decb763deb8b7192abab624997242da248960';
             const expectedECSignature = {
                 v: 27,
                 r: '0xc80bedc6756722672753413efdd749b5adbd4fd552595f59c13427407ee9aee0',
                 s: '0x2dea66f25a608bbae457e020fb6decb763deb8b7192abab624997242da248960',
             };
             stubs = [
-                Sinon.stub((zeroEx as any)._web3Wrapper, 'signTransactionAsync')
-                    .returns(Promise.resolve(signature)),
+                Sinon.stub((zeroEx as any)._web3Wrapper, 'signTransactionAsync').returns(Promise.resolve(signature)),
                 Sinon.stub(ZeroEx, 'isValidSignature').returns(true),
             ];
 
@@ -271,8 +274,9 @@ describe('ZeroEx library', () => {
                 networkId: constants.TESTRPC_NETWORK_ID,
             };
             const zeroExWithWrongTokenRegistryAddress = new ZeroEx(web3.currentProvider, zeroExConfig);
-            expect(zeroExWithWrongTokenRegistryAddress.tokenRegistry.getContractAddress())
-                .to.be.equal(ZeroEx.NULL_ADDRESS);
+            expect(zeroExWithWrongTokenRegistryAddress.tokenRegistry.getContractAddress()).to.be.equal(
+                ZeroEx.NULL_ADDRESS,
+            );
         });
     });
 });
diff --git a/packages/0x.js/test/artifacts_test.ts b/packages/0x.js/test/artifacts_test.ts
index d12346db3..e8ab9aa97 100644
--- a/packages/0x.js/test/artifacts_test.ts
+++ b/packages/0x.js/test/artifacts_test.ts
@@ -1,10 +1,10 @@
 import * as fs from 'fs';
 import HDWalletProvider = require('truffle-hdwallet-provider');
 
-import {ZeroEx} from '../src';
+import { ZeroEx } from '../src';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
 
 chaiSetup.configure();
 
diff --git a/packages/0x.js/test/assert_test.ts b/packages/0x.js/test/assert_test.ts
index 9fa7f780f..1f2820070 100644
--- a/packages/0x.js/test/assert_test.ts
+++ b/packages/0x.js/test/assert_test.ts
@@ -1,11 +1,11 @@
 import * as chai from 'chai';
 import 'mocha';
 
-import {ZeroEx} from '../src';
-import {assert} from '../src/utils/assert';
+import { ZeroEx } from '../src';
+import { assert } from '../src/utils/assert';
 
-import {constants} from './utils/constants';
-import {web3Factory} from './utils/web3_factory';
+import { constants } from './utils/constants';
+import { web3Factory } from './utils/web3_factory';
 
 const expect = chai.expect;
 
@@ -19,22 +19,25 @@ describe('Assertion library', () => {
         it('throws when address is invalid', async () => {
             const address = '0xdeadbeef';
             const varName = 'address';
-            return expect(assert.isSenderAddressAsync(varName, address, (zeroEx as any)._web3Wrapper))
-                .to.be.rejectedWith(`Expected ${varName} to be of type ETHAddressHex, encountered: ${address}`);
+            return expect(
+                assert.isSenderAddressAsync(varName, address, (zeroEx as any)._web3Wrapper),
+            ).to.be.rejectedWith(`Expected ${varName} to be of type ETHAddressHex, encountered: ${address}`);
         });
         it('throws when address is unavailable', async () => {
             const validUnrelatedAddress = '0x8b0292b11a196601eddce54b665cafeca0347d42';
             const varName = 'address';
-            return expect(assert.isSenderAddressAsync(varName, validUnrelatedAddress, (zeroEx as any)._web3Wrapper))
-                .to.be.rejectedWith(
-                    `Specified ${varName} ${validUnrelatedAddress} isn't available through the supplied web3 provider`,
-                );
+            return expect(
+                assert.isSenderAddressAsync(varName, validUnrelatedAddress, (zeroEx as any)._web3Wrapper),
+            ).to.be.rejectedWith(
+                `Specified ${varName} ${validUnrelatedAddress} isn't available through the supplied web3 provider`,
+            );
         });
-        it('doesn\'t throw if address is available', async () => {
+        it("doesn't throw if address is available", async () => {
             const availableAddress = (await zeroEx.getAvailableAddressesAsync())[0];
             const varName = 'address';
-            return expect(assert.isSenderAddressAsync(varName, availableAddress, (zeroEx as any)._web3Wrapper))
-                .to.become(undefined);
+            return expect(
+                assert.isSenderAddressAsync(varName, availableAddress, (zeroEx as any)._web3Wrapper),
+            ).to.become(undefined);
         });
     });
 });
diff --git a/packages/0x.js/test/ether_token_wrapper_test.ts b/packages/0x.js/test/ether_token_wrapper_test.ts
index 4fcb37409..b39481b55 100644
--- a/packages/0x.js/test/ether_token_wrapper_test.ts
+++ b/packages/0x.js/test/ether_token_wrapper_test.ts
@@ -1,4 +1,4 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import 'mocha';
@@ -17,13 +17,13 @@ import {
     ZeroEx,
     ZeroExError,
 } from '../src';
-import {artifacts} from '../src/artifacts';
-import {DoneCallback} from '../src/types';
+import { artifacts } from '../src/artifacts';
+import { DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -167,10 +167,12 @@ describe('EtherTokenWrapper', () => {
                     done();
                 };
                 await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH);
-                zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callback);
+                zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callback);
                 await zeroEx.token.transferAsync(
-                    etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount,
+                    etherTokenAddress,
+                    addressWithETH,
+                    addressWithoutFunds,
+                    transferAmount,
                 );
             })().catch(done);
         });
@@ -186,10 +188,12 @@ describe('EtherTokenWrapper', () => {
                     expect(args._value).to.be.bignumber.equal(allowanceAmount);
                     done();
                 };
-                zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Approval, indexFilterValues, callback);
+                zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Approval, indexFilterValues, callback);
                 await zeroEx.token.setAllowanceAsync(
-                    etherTokenAddress, addressWithETH, addressWithoutFunds, allowanceAmount,
+                    etherTokenAddress,
+                    addressWithETH,
+                    addressWithoutFunds,
+                    allowanceAmount,
                 );
             })().catch(done);
         });
@@ -204,11 +208,8 @@ describe('EtherTokenWrapper', () => {
                     expect(args._value).to.be.bignumber.equal(depositAmount);
                     done();
                 };
-                zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Deposit, indexFilterValues, callback);
-                await zeroEx.etherToken.depositAsync(
-                    etherTokenAddress, depositAmount, addressWithETH,
-                );
+                zeroEx.etherToken.subscribe(etherTokenAddress, EtherTokenEvents.Deposit, indexFilterValues, callback);
+                await zeroEx.etherToken.depositAsync(etherTokenAddress, depositAmount, addressWithETH);
             })().catch(done);
         });
         it('Should receive the Withdrawal event when ether is being withdrawn', (done: DoneCallback) => {
@@ -222,14 +223,14 @@ describe('EtherTokenWrapper', () => {
                     expect(args._value).to.be.bignumber.equal(depositAmount);
                     done();
                 };
-                await zeroEx.etherToken.depositAsync(
-                    etherTokenAddress, depositAmount, addressWithETH,
-                );
+                await zeroEx.etherToken.depositAsync(etherTokenAddress, depositAmount, addressWithETH);
                 zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Withdrawal, indexFilterValues, callback);
-                await zeroEx.etherToken.withdrawAsync(
-                    etherTokenAddress, withdrawalAmount, addressWithETH,
+                    etherTokenAddress,
+                    EtherTokenEvents.Withdrawal,
+                    indexFilterValues,
+                    callback,
                 );
+                await zeroEx.etherToken.withdrawAsync(etherTokenAddress, withdrawalAmount, addressWithETH);
             })().catch(done);
         });
         it('should cancel outstanding subscriptions when ZeroEx.setProvider is called', (done: DoneCallback) => {
@@ -238,7 +239,10 @@ describe('EtherTokenWrapper', () => {
                     done(new Error('Expected this subscription to have been cancelled'));
                 };
                 zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled,
+                    etherTokenAddress,
+                    EtherTokenEvents.Transfer,
+                    indexFilterValues,
+                    callbackNeverToBeCalled,
                 );
                 const callbackToBeCalled = (err: Error, logEvent: DecodedLogEvent<ApprovalContractEventArgs>) => {
                     done();
@@ -247,10 +251,16 @@ describe('EtherTokenWrapper', () => {
                 zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
                 await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH);
                 zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackToBeCalled,
+                    etherTokenAddress,
+                    EtherTokenEvents.Transfer,
+                    indexFilterValues,
+                    callbackToBeCalled,
                 );
                 await zeroEx.token.transferAsync(
-                    etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount,
+                    etherTokenAddress,
+                    addressWithETH,
+                    addressWithoutFunds,
+                    transferAmount,
                 );
             })().catch(done);
         });
@@ -261,10 +271,17 @@ describe('EtherTokenWrapper', () => {
                 };
                 await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH);
                 const subscriptionToken = zeroEx.etherToken.subscribe(
-                    etherTokenAddress, EtherTokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled);
+                    etherTokenAddress,
+                    EtherTokenEvents.Transfer,
+                    indexFilterValues,
+                    callbackNeverToBeCalled,
+                );
                 zeroEx.etherToken.unsubscribe(subscriptionToken);
                 await zeroEx.token.transferAsync(
-                    etherTokenAddress, addressWithETH, addressWithoutFunds, transferAmount,
+                    etherTokenAddress,
+                    addressWithETH,
+                    addressWithoutFunds,
+                    transferAmount,
                 );
                 done();
             })().catch(done);
@@ -291,7 +308,10 @@ describe('EtherTokenWrapper', () => {
             const eventName = EtherTokenEvents.Approval;
             const indexFilterValues = {};
             const logs = await zeroEx.etherToken.getLogsAsync<ApprovalContractEventArgs>(
-                etherTokenAddress, eventName, blockRange, indexFilterValues,
+                etherTokenAddress,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
@@ -305,7 +325,10 @@ describe('EtherTokenWrapper', () => {
             const eventName = EtherTokenEvents.Deposit;
             const indexFilterValues = {};
             const logs = await zeroEx.etherToken.getLogsAsync<DepositContractEventArgs>(
-                etherTokenAddress, eventName, blockRange, indexFilterValues,
+                etherTokenAddress,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
@@ -319,7 +342,10 @@ describe('EtherTokenWrapper', () => {
             const differentEventName = EtherTokenEvents.Transfer;
             const indexFilterValues = {};
             const logs = await zeroEx.etherToken.getLogsAsync(
-                etherTokenAddress, differentEventName, blockRange, indexFilterValues,
+                etherTokenAddress,
+                differentEventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(0);
         });
@@ -333,7 +359,10 @@ describe('EtherTokenWrapper', () => {
                 _owner: addressWithETH,
             };
             const logs = await zeroEx.etherToken.getLogsAsync<ApprovalContractEventArgs>(
-                etherTokenAddress, eventName, blockRange, indexFilterValues,
+                etherTokenAddress,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
diff --git a/packages/0x.js/test/event_watcher_test.ts b/packages/0x.js/test/event_watcher_test.ts
index 95af99268..ace1cd5d9 100644
--- a/packages/0x.js/test/event_watcher_test.ts
+++ b/packages/0x.js/test/event_watcher_test.ts
@@ -1,18 +1,16 @@
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
 import * as Sinon from 'sinon';
 import * as Web3 from 'web3';
 
-import {
-    LogEvent,
-} from '../src';
-import {EventWatcher} from '../src/order_watcher/event_watcher';
-import {DoneCallback} from '../src/types';
+import { LogEvent } from '../src';
+import { EventWatcher } from '../src/order_watcher/event_watcher';
+import { DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -38,7 +36,7 @@ describe('EventWatcher', () => {
         blockNumber: null,
         data: '',
         logIndex: null,
-        topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
+        topics: ['0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567'],
         transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
         transactionIndex: 0,
     };
@@ -48,7 +46,7 @@ describe('EventWatcher', () => {
         blockNumber: null,
         data: '',
         logIndex: null,
-        topics: [ '0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567' ],
+        topics: ['0xf341246adaac6f497bc2a656f546ab9e182111d630394f0c57c710a59a2cb567'],
         transactionHash: '0x01ef3c048b18d9b09ea195b4ed94cf8dd5f3d857a1905ff886b152cfb1166f25',
         transactionIndex: 0,
     };
diff --git a/packages/0x.js/test/exchange_transfer_simulator_test.ts b/packages/0x.js/test/exchange_transfer_simulator_test.ts
index c7e3cde06..cd4037cd9 100644
--- a/packages/0x.js/test/exchange_transfer_simulator_test.ts
+++ b/packages/0x.js/test/exchange_transfer_simulator_test.ts
@@ -1,14 +1,14 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 
-import {ExchangeContractErrs, Token, ZeroEx} from '../src';
-import {BlockParamLiteral, TradeSide, TransferType} from '../src/types';
-import {ExchangeTransferSimulator} from '../src/utils/exchange_transfer_simulator';
+import { ExchangeContractErrs, Token, ZeroEx } from '../src';
+import { BlockParamLiteral, TradeSide, TransferType } from '../src/types';
+import { ExchangeTransferSimulator } from '../src/utils/exchange_transfer_simulator';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -45,17 +45,31 @@ describe('ExchangeTransferSimulator', () => {
         beforeEach(() => {
             exchangeTransferSimulator = new ExchangeTransferSimulator(zeroEx.token, BlockParamLiteral.Latest);
         });
-        it('throws if the user doesn\'t have enough allowance', async () => {
-            return expect(exchangeTransferSimulator.transferFromAsync(
-                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
-            )).to.be.rejectedWith(ExchangeContractErrs.InsufficientTakerAllowance);
+        it("throws if the user doesn't have enough allowance", async () => {
+            return expect(
+                exchangeTransferSimulator.transferFromAsync(
+                    exampleTokenAddress,
+                    sender,
+                    recipient,
+                    transferAmount,
+                    TradeSide.Taker,
+                    TransferType.Trade,
+                ),
+            ).to.be.rejectedWith(ExchangeContractErrs.InsufficientTakerAllowance);
         });
-        it('throws if the user doesn\'t have enough balance', async () => {
+        it("throws if the user doesn't have enough balance", async () => {
             txHash = await zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
             await zeroEx.awaitTransactionMinedAsync(txHash);
-            return expect(exchangeTransferSimulator.transferFromAsync(
-                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Maker, TransferType.Trade,
-            )).to.be.rejectedWith(ExchangeContractErrs.InsufficientMakerBalance);
+            return expect(
+                exchangeTransferSimulator.transferFromAsync(
+                    exampleTokenAddress,
+                    sender,
+                    recipient,
+                    transferAmount,
+                    TradeSide.Maker,
+                    TransferType.Trade,
+                ),
+            ).to.be.rejectedWith(ExchangeContractErrs.InsufficientMakerBalance);
         });
         it('updates balances and proxyAllowance after transfer', async () => {
             txHash = await zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
@@ -63,7 +77,12 @@ describe('ExchangeTransferSimulator', () => {
             txHash = await zeroEx.token.setProxyAllowanceAsync(exampleTokenAddress, sender, transferAmount);
             await zeroEx.awaitTransactionMinedAsync(txHash);
             await exchangeTransferSimulator.transferFromAsync(
-                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
+                exampleTokenAddress,
+                sender,
+                recipient,
+                transferAmount,
+                TradeSide.Taker,
+                TransferType.Trade,
             );
             const store = (exchangeTransferSimulator as any)._store;
             const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
@@ -73,13 +92,18 @@ describe('ExchangeTransferSimulator', () => {
             expect(recipientBalance).to.be.bignumber.equal(transferAmount);
             expect(senderProxyAllowance).to.be.bignumber.equal(0);
         });
-        it('doesn\'t update proxyAllowance after transfer if unlimited', async () => {
+        it("doesn't update proxyAllowance after transfer if unlimited", async () => {
             txHash = await zeroEx.token.transferAsync(exampleTokenAddress, coinbase, sender, transferAmount);
             await zeroEx.awaitTransactionMinedAsync(txHash);
             txHash = await zeroEx.token.setUnlimitedProxyAllowanceAsync(exampleTokenAddress, sender);
             await zeroEx.awaitTransactionMinedAsync(txHash);
             await exchangeTransferSimulator.transferFromAsync(
-                exampleTokenAddress, sender, recipient, transferAmount, TradeSide.Taker, TransferType.Trade,
+                exampleTokenAddress,
+                sender,
+                recipient,
+                transferAmount,
+                TradeSide.Taker,
+                TransferType.Trade,
             );
             const store = (exchangeTransferSimulator as any)._store;
             const senderBalance = await store.getBalanceAsync(exampleTokenAddress, sender);
diff --git a/packages/0x.js/test/exchange_wrapper_test.ts b/packages/0x.js/test/exchange_wrapper_test.ts
index 9c55069da..9ac6a10b3 100644
--- a/packages/0x.js/test/exchange_wrapper_test.ts
+++ b/packages/0x.js/test/exchange_wrapper_test.ts
@@ -1,4 +1,4 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import 'mocha';
@@ -17,13 +17,13 @@ import {
     Token,
     ZeroEx,
 } from '../src';
-import {BlockParamLiteral, DoneCallback} from '../src/types';
+import { BlockParamLiteral, DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {FillScenarios} from './utils/fill_scenarios';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { FillScenarios } from './utils/fill_scenarios';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -80,10 +80,18 @@ describe('ExchangeWrapper', () => {
                 const fillableAmount = new BigNumber(5);
                 const partialFillTakerAmount = new BigNumber(2);
                 const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 const anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 const orderFillRequests = [
                     {
@@ -103,7 +111,11 @@ describe('ExchangeWrapper', () => {
                 const fillableAmount = new BigNumber(5);
                 beforeEach(async () => {
                     signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        fillableAmount,
                     );
                     orderFillRequests = [
                         {
@@ -113,18 +125,23 @@ describe('ExchangeWrapper', () => {
                     ];
                 });
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress))
-                        .to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress, {
-                        shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress, {
+                            shouldValidate: true,
+                        }),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress, {
-                        shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchFillOrKillAsync(orderFillRequests, takerAddress, {
+                            shouldValidate: false,
+                        }),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
             });
         });
@@ -133,57 +150,78 @@ describe('ExchangeWrapper', () => {
             const fillableAmount = new BigNumber(5);
             beforeEach(async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
             });
             describe('successful fills', () => {
                 it('should fill a valid order', async () => {
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(0);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(0);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount);
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        0,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        0,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount,
+                    );
                     await zeroEx.exchange.fillOrKillOrderAsync(signedOrder, takerTokenFillAmount, takerAddress);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(takerTokenFillAmount));
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(takerTokenFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(takerTokenFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(takerTokenFillAmount));
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(takerTokenFillAmount),
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        takerTokenFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        takerTokenFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(takerTokenFillAmount),
+                    );
                 });
                 it('should partially fill a valid order', async () => {
                     const partialFillAmount = new BigNumber(3);
                     await zeroEx.exchange.fillOrKillOrderAsync(signedOrder, partialFillAmount, takerAddress);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(partialFillAmount));
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(partialFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(partialFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(partialFillAmount));
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(partialFillAmount),
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        partialFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        partialFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(partialFillAmount),
+                    );
                 });
             });
             describe('order transaction options', () => {
                 const emptyFillableAmount = new BigNumber(0);
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress))
-                        .to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress, {
-                        shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress, {
+                            shouldValidate: true,
+                        }),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress, {
-                        shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrKillOrderAsync(signedOrder, emptyFillableAmount, takerAddress, {
+                            shouldValidate: false,
+                        }),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
             });
         });
@@ -209,57 +247,96 @@ describe('ExchangeWrapper', () => {
             describe('successful fills', () => {
                 it('should fill a valid order', async () => {
                     const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
-                    );
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(0);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(0);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount);
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        fillableAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        0,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        0,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount,
+                    );
                     const txHash = await zeroEx.exchange.fillOrderAsync(
-                        signedOrder, takerTokenFillAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress);
+                        signedOrder,
+                        takerTokenFillAmount,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        takerAddress,
+                    );
                     await zeroEx.awaitTransactionMinedAsync(txHash);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(takerTokenFillAmount));
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(takerTokenFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(takerTokenFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(takerTokenFillAmount));
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(takerTokenFillAmount),
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        takerTokenFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        takerTokenFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(takerTokenFillAmount),
+                    );
                 });
                 it('should partially fill the valid order', async () => {
                     const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        fillableAmount,
                     );
                     const partialFillAmount = new BigNumber(3);
                     const txHash = await zeroEx.exchange.fillOrderAsync(
-                        signedOrder, partialFillAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress);
+                        signedOrder,
+                        partialFillAmount,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        takerAddress,
+                    );
                     await zeroEx.awaitTransactionMinedAsync(txHash);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(partialFillAmount));
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress))
-                        .to.be.bignumber.equal(partialFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(partialFillAmount);
-                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress))
-                        .to.be.bignumber.equal(fillableAmount.minus(partialFillAmount));
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(partialFillAmount),
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, makerAddress)).to.be.bignumber.equal(
+                        partialFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(makerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        partialFillAmount,
+                    );
+                    expect(await zeroEx.token.getBalanceAsync(takerTokenAddress, takerAddress)).to.be.bignumber.equal(
+                        fillableAmount.minus(partialFillAmount),
+                    );
                 });
                 it('should fill the valid orders with fees', async () => {
                     const makerFee = new BigNumber(1);
                     const takerFee = new BigNumber(2);
                     const signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                        makerTokenAddress, takerTokenAddress, makerFee, takerFee,
-                        makerAddress, takerAddress, fillableAmount, feeRecipient,
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        makerFee,
+                        takerFee,
+                        makerAddress,
+                        takerAddress,
+                        fillableAmount,
+                        feeRecipient,
                     );
                     const txHash = await zeroEx.exchange.fillOrderAsync(
-                        signedOrder, takerTokenFillAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress);
+                        signedOrder,
+                        takerTokenFillAmount,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        takerAddress,
+                    );
                     await zeroEx.awaitTransactionMinedAsync(txHash);
-                    expect(await zeroEx.token.getBalanceAsync(zrxTokenAddress, feeRecipient))
-                        .to.be.bignumber.equal(makerFee.plus(takerFee));
+                    expect(await zeroEx.token.getBalanceAsync(zrxTokenAddress, feeRecipient)).to.be.bignumber.equal(
+                        makerFee.plus(takerFee),
+                    );
                 });
             });
             describe('order transaction options', () => {
@@ -267,25 +344,48 @@ describe('ExchangeWrapper', () => {
                 const emptyFillTakerAmount = new BigNumber(0);
                 beforeEach(async () => {
                     signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        fillableAmount,
                     );
                 });
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.fillOrderAsync(
-                        signedOrder, emptyFillTakerAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
-                    )).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrderAsync(
+                            signedOrder,
+                            emptyFillTakerAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                        ),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrderAsync(
-                        signedOrder, emptyFillTakerAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrderAsync(
+                            signedOrder,
+                            emptyFillTakerAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: true,
+                            },
+                        ),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrderAsync(
-                        signedOrder, emptyFillTakerAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrderAsync(
+                            signedOrder,
+                            emptyFillTakerAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: false,
+                            },
+                        ),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
             });
         });
@@ -297,11 +397,19 @@ describe('ExchangeWrapper', () => {
             let orderFillBatch: OrderFillRequest[];
             beforeEach(async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 signedOrderHashHex = ZeroEx.getOrderHashHex(signedOrder);
                 anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 anotherOrderHashHex = ZeroEx.getOrderHashHex(anotherSignedOrder);
             });
@@ -319,13 +427,20 @@ describe('ExchangeWrapper', () => {
                     ];
                 });
                 it('should throw if a batch is empty', async () => {
-                    return expect(zeroEx.exchange.batchFillOrdersAsync(
-                        [], shouldThrowOnInsufficientBalanceOrAllowance, takerAddress),
+                    return expect(
+                        zeroEx.exchange.batchFillOrdersAsync(
+                            [],
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                        ),
                     ).to.be.rejectedWith(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
                 });
                 it('should successfully fill multiple orders', async () => {
                     const txHash = await zeroEx.exchange.batchFillOrdersAsync(
-                        orderFillBatch, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress);
+                        orderFillBatch,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        takerAddress,
+                    );
                     await zeroEx.awaitTransactionMinedAsync(txHash);
                     const filledAmount = await zeroEx.exchange.getFilledTakerAmountAsync(signedOrderHashHex);
                     const anotherFilledAmount = await zeroEx.exchange.getFilledTakerAmountAsync(anotherOrderHashHex);
@@ -348,21 +463,37 @@ describe('ExchangeWrapper', () => {
                     ];
                 });
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.batchFillOrdersAsync(
-                        orderFillBatch, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress),
+                    return expect(
+                        zeroEx.exchange.batchFillOrdersAsync(
+                            orderFillBatch,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                        ),
                     ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.batchFillOrdersAsync(
-                        orderFillBatch, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchFillOrdersAsync(
+                            orderFillBatch,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: true,
+                            },
+                        ),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.batchFillOrdersAsync(
-                        orderFillBatch, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchFillOrdersAsync(
+                            orderFillBatch,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: false,
+                            },
+                        ),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
             });
         });
@@ -375,24 +506,40 @@ describe('ExchangeWrapper', () => {
             const fillUpToAmount = fillableAmount.plus(fillableAmount).minus(1);
             beforeEach(async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 signedOrderHashHex = ZeroEx.getOrderHashHex(signedOrder);
                 anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 anotherOrderHashHex = ZeroEx.getOrderHashHex(anotherSignedOrder);
                 signedOrders = [signedOrder, anotherSignedOrder];
             });
             describe('successful batch fills', () => {
                 it('should throw if a batch is empty', async () => {
-                    return expect(zeroEx.exchange.fillOrdersUpToAsync(
-                        [], fillUpToAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress),
+                    return expect(
+                        zeroEx.exchange.fillOrdersUpToAsync(
+                            [],
+                            fillUpToAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                        ),
                     ).to.be.rejectedWith(ExchangeContractErrs.BatchOrdersMustHaveAtLeastOneItem);
                 });
                 it('should successfully fill up to specified amount', async () => {
                     const txHash = await zeroEx.exchange.fillOrdersUpToAsync(
-                        signedOrders, fillUpToAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+                        signedOrders,
+                        fillUpToAmount,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        takerAddress,
                     );
                     await zeroEx.awaitTransactionMinedAsync(txHash);
                     const filledAmount = await zeroEx.exchange.getFilledTakerAmountAsync(signedOrderHashHex);
@@ -405,21 +552,40 @@ describe('ExchangeWrapper', () => {
             describe('order transaction options', () => {
                 const emptyFillUpToAmount = new BigNumber(0);
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.fillOrdersUpToAsync(
-                        signedOrders, emptyFillUpToAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
-                    )).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrdersUpToAsync(
+                            signedOrders,
+                            emptyFillUpToAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                        ),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrdersUpToAsync(
-                        signedOrders, emptyFillUpToAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrdersUpToAsync(
+                            signedOrders,
+                            emptyFillUpToAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: true,
+                            },
+                        ),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.fillOrdersUpToAsync(
-                        signedOrders, emptyFillUpToAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress, {
-                            shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+                    return expect(
+                        zeroEx.exchange.fillOrdersUpToAsync(
+                            signedOrders,
+                            emptyFillUpToAmount,
+                            shouldThrowOnInsufficientBalanceOrAllowance,
+                            takerAddress,
+                            {
+                                shouldValidate: false,
+                            },
+                        ),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
                 });
             });
         });
@@ -440,7 +606,11 @@ describe('ExchangeWrapper', () => {
             makerTokenAddress = makerToken.address;
             takerTokenAddress = takerToken.address;
             signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             orderHashHex = ZeroEx.getOrderHashHex(signedOrder);
         });
@@ -456,18 +626,23 @@ describe('ExchangeWrapper', () => {
             describe('order transaction options', () => {
                 const emptyCancelTakerTokenAmount = new BigNumber(0);
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount))
-                        .to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(
+                        zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount, {
-                        shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(
+                        zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount, {
+                            shouldValidate: true,
+                        }),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount, {
-                        shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(
+                        zeroEx.exchange.cancelOrderAsync(signedOrder, emptyCancelTakerTokenAmount, {
+                            shouldValidate: false,
+                        }),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
                 });
             });
         });
@@ -477,7 +652,11 @@ describe('ExchangeWrapper', () => {
             let cancelBatch: OrderCancellationRequest[];
             beforeEach(async () => {
                 anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                    makerTokenAddress,
+                    takerTokenAddress,
+                    makerAddress,
+                    takerAddress,
+                    fillableAmount,
                 );
                 anotherOrderHashHex = ZeroEx.getOrderHashHex(anotherSignedOrder);
                 cancelBatch = [
@@ -494,15 +673,21 @@ describe('ExchangeWrapper', () => {
             describe('failed batch cancels', () => {
                 it('should throw when orders have different makers', async () => {
                     const signedOrderWithDifferentMaker = await fillScenarios.createFillableSignedOrderAsync(
-                        makerTokenAddress, takerTokenAddress, takerAddress, takerAddress, fillableAmount,
+                        makerTokenAddress,
+                        takerTokenAddress,
+                        takerAddress,
+                        takerAddress,
+                        fillableAmount,
                     );
-                    return expect(zeroEx.exchange.batchCancelOrdersAsync([
-                        cancelBatch[0],
-                        {
-                            order: signedOrderWithDifferentMaker,
-                            takerTokenCancelAmount: cancelAmount,
-                        },
-                    ])).to.be.rejectedWith(ExchangeContractErrs.MultipleMakersInSingleCancelBatchDisallowed);
+                    return expect(
+                        zeroEx.exchange.batchCancelOrdersAsync([
+                            cancelBatch[0],
+                            {
+                                order: signedOrderWithDifferentMaker,
+                                takerTokenCancelAmount: cancelAmount,
+                            },
+                        ]),
+                    ).to.be.rejectedWith(ExchangeContractErrs.MultipleMakersInSingleCancelBatchDisallowed);
                 });
             });
             describe('successful batch cancels', () => {
@@ -531,18 +716,23 @@ describe('ExchangeWrapper', () => {
                     ];
                 });
                 it('should validate when orderTransactionOptions are not present', async () => {
-                    return expect(zeroEx.exchange.batchCancelOrdersAsync(cancelBatch))
-                        .to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(zeroEx.exchange.batchCancelOrdersAsync(cancelBatch)).to.be.rejectedWith(
+                        ExchangeContractErrs.OrderCancelAmountZero,
+                    );
                 });
                 it('should validate when orderTransactionOptions specify to validate', async () => {
-                    return expect(zeroEx.exchange.batchCancelOrdersAsync(cancelBatch, {
-                        shouldValidate: true,
-                    })).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchCancelOrdersAsync(cancelBatch, {
+                            shouldValidate: true,
+                        }),
+                    ).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
                 });
                 it('should not validate when orderTransactionOptions specify not to validate', async () => {
-                    return expect(zeroEx.exchange.batchCancelOrdersAsync(cancelBatch, {
-                        shouldValidate: false,
-                    })).to.not.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+                    return expect(
+                        zeroEx.exchange.batchCancelOrdersAsync(cancelBatch, {
+                            shouldValidate: false,
+                        }),
+                    ).to.not.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
                 });
             });
         });
@@ -566,7 +756,11 @@ describe('ExchangeWrapper', () => {
             fillableAmount = new BigNumber(5);
             partialFillAmount = new BigNumber(2);
             signedOrder = await fillScenarios.createPartiallyFilledSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, takerAddress, fillableAmount, partialFillAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                takerAddress,
+                fillableAmount,
+                partialFillAmount,
             );
             orderHash = ZeroEx.getOrderHashHex(signedOrder);
         });
@@ -590,8 +784,7 @@ describe('ExchangeWrapper', () => {
                 return expect(zeroEx.exchange.getFilledTakerAmountAsync(invalidOrderHashHex)).to.be.rejected();
             });
             it('should return zero if passed a valid but non-existent orderHash', async () => {
-                const filledValueT = await zeroEx.exchange.getFilledTakerAmountAsync(NON_EXISTENT_ORDER_HASH,
-                );
+                const filledValueT = await zeroEx.exchange.getFilledTakerAmountAsync(NON_EXISTENT_ORDER_HASH);
                 expect(filledValueT).to.be.bignumber.equal(0);
             });
             it('should return the filledValueT for a valid and partially filled orderHash', async () => {
@@ -641,7 +834,11 @@ describe('ExchangeWrapper', () => {
         beforeEach(async () => {
             fillableAmount = new BigNumber(5);
             signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
         });
         afterEach(async () => {
@@ -654,42 +851,35 @@ describe('ExchangeWrapper', () => {
         // Source: https://github.com/mochajs/mocha/issues/2407
         it('Should receive the LogFill event when an order is filled', (done: DoneCallback) => {
             (async () => {
-
                 const callback = (err: Error, logEvent: DecodedLogEvent<LogFillContractEventArgs>) => {
                     expect(logEvent.log.event).to.be.equal(ExchangeEvents.LogFill);
                     done();
                 };
-                zeroEx.exchange.subscribe(
-                    ExchangeEvents.LogFill, indexFilterValues, callback,
-                );
+                zeroEx.exchange.subscribe(ExchangeEvents.LogFill, indexFilterValues, callback);
                 await zeroEx.exchange.fillOrderAsync(
-                    signedOrder, takerTokenFillAmountInBaseUnits, shouldThrowOnInsufficientBalanceOrAllowance,
+                    signedOrder,
+                    takerTokenFillAmountInBaseUnits,
+                    shouldThrowOnInsufficientBalanceOrAllowance,
                     takerAddress,
                 );
             })().catch(done);
         });
         it('Should receive the LogCancel event when an order is cancelled', (done: DoneCallback) => {
             (async () => {
-
                 const callback = (err: Error, logEvent: DecodedLogEvent<LogCancelContractEventArgs>) => {
                     expect(logEvent.log.event).to.be.equal(ExchangeEvents.LogCancel);
                     done();
                 };
-                zeroEx.exchange.subscribe(
-                    ExchangeEvents.LogCancel, indexFilterValues, callback,
-                );
+                zeroEx.exchange.subscribe(ExchangeEvents.LogCancel, indexFilterValues, callback);
                 await zeroEx.exchange.cancelOrderAsync(signedOrder, cancelTakerAmountInBaseUnits);
             })().catch(done);
         });
         it('Outstanding subscriptions are cancelled when zeroEx.setProvider called', (done: DoneCallback) => {
             (async () => {
-
                 const callbackNeverToBeCalled = (err: Error, logEvent: DecodedLogEvent<LogFillContractEventArgs>) => {
                     done(new Error('Expected this subscription to have been cancelled'));
                 };
-                zeroEx.exchange.subscribe(
-                    ExchangeEvents.LogFill, indexFilterValues, callbackNeverToBeCalled,
-                );
+                zeroEx.exchange.subscribe(ExchangeEvents.LogFill, indexFilterValues, callbackNeverToBeCalled);
 
                 const newProvider = web3Factory.getRpcProvider();
                 zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
@@ -698,11 +888,11 @@ describe('ExchangeWrapper', () => {
                     expect(logEvent.log.event).to.be.equal(ExchangeEvents.LogFill);
                     done();
                 };
-                zeroEx.exchange.subscribe(
-                    ExchangeEvents.LogFill, indexFilterValues, callback,
-                );
+                zeroEx.exchange.subscribe(ExchangeEvents.LogFill, indexFilterValues, callback);
                 await zeroEx.exchange.fillOrderAsync(
-                    signedOrder, takerTokenFillAmountInBaseUnits, shouldThrowOnInsufficientBalanceOrAllowance,
+                    signedOrder,
+                    takerTokenFillAmountInBaseUnits,
+                    shouldThrowOnInsufficientBalanceOrAllowance,
                     takerAddress,
                 );
             })().catch(done);
@@ -713,11 +903,15 @@ describe('ExchangeWrapper', () => {
                     done(new Error('Expected this subscription to have been cancelled'));
                 };
                 const subscriptionToken = zeroEx.exchange.subscribe(
-                    ExchangeEvents.LogFill, indexFilterValues, callbackNeverToBeCalled,
+                    ExchangeEvents.LogFill,
+                    indexFilterValues,
+                    callbackNeverToBeCalled,
                 );
                 zeroEx.exchange.unsubscribe(subscriptionToken);
                 await zeroEx.exchange.fillOrderAsync(
-                    signedOrder, takerTokenFillAmountInBaseUnits, shouldThrowOnInsufficientBalanceOrAllowance,
+                    signedOrder,
+                    takerTokenFillAmountInBaseUnits,
+                    shouldThrowOnInsufficientBalanceOrAllowance,
                     takerAddress,
                 );
                 done();
@@ -736,13 +930,18 @@ describe('ExchangeWrapper', () => {
             makerTokenAddress = makerToken.address;
             takerTokenAddress = takerToken.address;
         });
-        it('get\'s the same hash as the local function', async () => {
+        it("get's the same hash as the local function", async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-            const orderHashFromContract = await (zeroEx.exchange as any)
-                ._getOrderHashHexUsingContractCallAsync(signedOrder);
+            const orderHashFromContract = await (zeroEx.exchange as any)._getOrderHashHexUsingContractCallAsync(
+                signedOrder,
+            );
             expect(orderHash).to.equal(orderHashFromContract);
         });
     });
@@ -773,10 +972,17 @@ describe('ExchangeWrapper', () => {
         });
         it('should get logs with decoded args emitted by LogFill', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             txHash = await zeroEx.exchange.fillOrderAsync(
-                signedOrder, fillableAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+                signedOrder,
+                fillableAmount,
+                shouldThrowOnInsufficientBalanceOrAllowance,
+                takerAddress,
             );
             await zeroEx.awaitTransactionMinedAsync(txHash);
             const eventName = ExchangeEvents.LogFill;
@@ -787,10 +993,17 @@ describe('ExchangeWrapper', () => {
         });
         it('should only get the logs with the correct event name', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             txHash = await zeroEx.exchange.fillOrderAsync(
-                signedOrder, fillableAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+                signedOrder,
+                fillableAmount,
+                shouldThrowOnInsufficientBalanceOrAllowance,
+                takerAddress,
             );
             await zeroEx.awaitTransactionMinedAsync(txHash);
             const differentEventName = ExchangeEvents.LogCancel;
@@ -800,19 +1013,33 @@ describe('ExchangeWrapper', () => {
         });
         it('should only get the logs with the correct indexed fields', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             txHash = await zeroEx.exchange.fillOrderAsync(
-                signedOrder, fillableAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+                signedOrder,
+                fillableAmount,
+                shouldThrowOnInsufficientBalanceOrAllowance,
+                takerAddress,
             );
             await zeroEx.awaitTransactionMinedAsync(txHash);
 
             const differentMakerAddress = userAddresses[2];
             const anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, differentMakerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                differentMakerAddress,
+                takerAddress,
+                fillableAmount,
             );
             txHash = await zeroEx.exchange.fillOrderAsync(
-                anotherSignedOrder, fillableAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+                anotherSignedOrder,
+                fillableAmount,
+                shouldThrowOnInsufficientBalanceOrAllowance,
+                takerAddress,
             );
             await zeroEx.awaitTransactionMinedAsync(txHash);
 
@@ -821,7 +1048,9 @@ describe('ExchangeWrapper', () => {
                 maker: differentMakerAddress,
             };
             const logs = await zeroEx.exchange.getLogsAsync<LogFillContractEventArgs>(
-                eventName, blockRange, indexFilterValues,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
diff --git a/packages/0x.js/test/expiration_watcher_test.ts b/packages/0x.js/test/expiration_watcher_test.ts
index 30c395f00..b502207a6 100644
--- a/packages/0x.js/test/expiration_watcher_test.ts
+++ b/packages/0x.js/test/expiration_watcher_test.ts
@@ -1,4 +1,4 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import * as _ from 'lodash';
@@ -6,18 +6,18 @@ import 'mocha';
 import * as Sinon from 'sinon';
 import * as Web3 from 'web3';
 
-import {ZeroEx} from '../src/0x';
-import {ExpirationWatcher} from '../src/order_watcher/expiration_watcher';
-import {DoneCallback, Token} from '../src/types';
-import {constants} from '../src/utils/constants';
-import {utils} from '../src/utils/utils';
+import { ZeroEx } from '../src/0x';
+import { ExpirationWatcher } from '../src/order_watcher/expiration_watcher';
+import { DoneCallback, Token } from '../src/types';
+import { constants } from '../src/utils/constants';
+import { utils } from '../src/utils/utils';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants as testConstants} from './utils/constants';
-import {FillScenarios} from './utils/fill_scenarios';
-import {reportCallbackErrors} from './utils/report_callback_errors';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants as testConstants } from './utils/constants';
+import { FillScenarios } from './utils/fill_scenarios';
+import { reportCallbackErrors } from './utils/report_callback_errors';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -62,7 +62,7 @@ describe('ExpirationWatcher', () => {
     });
     beforeEach(async () => {
         await blockchainLifecycle.startAsync();
-        const sinonTimerConfig = {shouldAdvanceTime: true} as any;
+        const sinonTimerConfig = { shouldAdvanceTime: true } as any;
         // This constructor has incorrect types
         timer = Sinon.useFakeTimers(sinonTimerConfig);
         currentUnixTimestampSec = utils.getCurrentUnixTimestampSec();
@@ -78,7 +78,11 @@ describe('ExpirationWatcher', () => {
             const orderLifetimeSec = 60;
             const expirationUnixTimestampSec = currentUnixTimestampSec.plus(orderLifetimeSec);
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
                 expirationUnixTimestampSec,
             );
             const orderHash = ZeroEx.getOrderHashHex(signedOrder);
@@ -92,12 +96,16 @@ describe('ExpirationWatcher', () => {
             timer.tick(orderLifetimeSec * 1000);
         })().catch(done);
     });
-    it('doesn\'t emit events before order expires', (done: DoneCallback) => {
+    it("doesn't emit events before order expires", (done: DoneCallback) => {
         (async () => {
             const orderLifetimeSec = 60;
             const expirationUnixTimestampSec = currentUnixTimestampSec.plus(orderLifetimeSec);
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
                 expirationUnixTimestampSec,
             );
             const orderHash = ZeroEx.getOrderHashHex(signedOrder);
@@ -118,11 +126,19 @@ describe('ExpirationWatcher', () => {
             const order1ExpirationUnixTimestampSec = currentUnixTimestampSec.plus(order1Lifetime);
             const order2ExpirationUnixTimestampSec = currentUnixTimestampSec.plus(order2Lifetime);
             const signedOrder1 = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
                 order1ExpirationUnixTimestampSec,
             );
             const signedOrder2 = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
                 order2ExpirationUnixTimestampSec,
             );
             const orderHash1 = ZeroEx.getOrderHashHex(signedOrder1);
diff --git a/packages/0x.js/test/order_state_watcher_test.ts b/packages/0x.js/test/order_state_watcher_test.ts
index df32c7f14..7d0e02481 100644
--- a/packages/0x.js/test/order_state_watcher_test.ts
+++ b/packages/0x.js/test/order_state_watcher_test.ts
@@ -1,4 +1,4 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import * as _ from 'lodash';
@@ -15,14 +15,14 @@ import {
     ZeroEx,
     ZeroExError,
 } from '../src';
-import {DoneCallback} from '../src/types';
+import { DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {FillScenarios} from './utils/fill_scenarios';
-import {reportCallbackErrors} from './utils/report_callback_errors';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { FillScenarios } from './utils/fill_scenarios';
+import { reportCallbackErrors } from './utils/report_callback_errors';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 const TIMEOUT_MS = 150;
 
@@ -71,7 +71,11 @@ describe('OrderStateWatcher', () => {
     describe('#removeOrder', async () => {
         it('should successfully remove existing order', async () => {
             signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                makerToken.address,
+                takerToken.address,
+                maker,
+                taker,
+                fillableAmount,
             );
             const orderHash = ZeroEx.getOrderHashHex(signedOrder);
             zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -89,10 +93,18 @@ describe('OrderStateWatcher', () => {
         });
         it('should no-op when removing a non-existing order', async () => {
             signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                makerToken.address,
+                takerToken.address,
+                maker,
+                taker,
+                fillableAmount,
             );
             const orderHash = ZeroEx.getOrderHashHex(signedOrder);
-            const nonExistentOrderHash = `0x${orderHash.substr(2).split('').reverse().join('')}`;
+            const nonExistentOrderHash = `0x${orderHash
+                .substr(2)
+                .split('')
+                .reverse()
+                .join('')}`;
             zeroEx.orderStateWatcher.removeOrder(nonExistentOrderHash);
         });
     });
@@ -102,8 +114,7 @@ describe('OrderStateWatcher', () => {
         });
         it('should fail when trying to subscribe twice', async () => {
             zeroEx.orderStateWatcher.subscribe(_.noop);
-            expect(() => zeroEx.orderStateWatcher.subscribe(_.noop))
-                .to.throw(ZeroExError.SubscriptionAlreadyPresent);
+            expect(() => zeroEx.orderStateWatcher.subscribe(_.noop)).to.throw(ZeroExError.SubscriptionAlreadyPresent);
         });
     });
     describe('tests with cleanup', async () => {
@@ -115,7 +126,11 @@ describe('OrderStateWatcher', () => {
         it('should emit orderStateInvalid when maker allowance set to 0 for watched order', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 const orderHash = ZeroEx.getOrderHashHex(signedOrder);
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -133,7 +148,11 @@ describe('OrderStateWatcher', () => {
         it('should not emit an orderState event when irrelevant Transfer event received', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
                 const callback = reportCallbackErrors(done)((orderState: OrderState) => {
@@ -152,7 +171,11 @@ describe('OrderStateWatcher', () => {
         it('should emit orderStateInvalid when maker moves balance backing watched order', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 const orderHash = ZeroEx.getOrderHashHex(signedOrder);
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -172,7 +195,11 @@ describe('OrderStateWatcher', () => {
         it('should emit orderStateInvalid when watched order fully filled', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 const orderHash = ZeroEx.getOrderHashHex(signedOrder);
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -188,14 +215,21 @@ describe('OrderStateWatcher', () => {
 
                 const shouldThrowOnInsufficientBalanceOrAllowance = true;
                 await zeroEx.exchange.fillOrderAsync(
-                    signedOrder, fillableAmount, shouldThrowOnInsufficientBalanceOrAllowance, taker,
+                    signedOrder,
+                    fillableAmount,
+                    shouldThrowOnInsufficientBalanceOrAllowance,
+                    taker,
                 );
             })().catch(done);
         });
         it('should emit orderStateValid when watched order partially filled', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
 
                 const makerBalance = await zeroEx.token.getBalanceAsync(makerToken.address, maker);
@@ -211,16 +245,21 @@ describe('OrderStateWatcher', () => {
                     const remainingMakerBalance = makerBalance.sub(fillAmountInBaseUnits);
                     const remainingFillable = fillableAmount.minus(fillAmountInBaseUnits);
                     expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                        remainingFillable);
+                        remainingFillable,
+                    );
                     expect(orderRelevantState.remainingFillableTakerTokenAmount).to.be.bignumber.equal(
-                        remainingFillable);
+                        remainingFillable,
+                    );
                     expect(orderRelevantState.makerBalance).to.be.bignumber.equal(remainingMakerBalance);
                     done();
                 });
                 zeroEx.orderStateWatcher.subscribe(callback);
                 const shouldThrowOnInsufficientBalanceOrAllowance = true;
                 await zeroEx.exchange.fillOrderAsync(
-                    signedOrder, fillAmountInBaseUnits, shouldThrowOnInsufficientBalanceOrAllowance, taker,
+                    signedOrder,
+                    fillAmountInBaseUnits,
+                    shouldThrowOnInsufficientBalanceOrAllowance,
+                    taker,
                 );
             })().catch(done);
         });
@@ -229,8 +268,15 @@ describe('OrderStateWatcher', () => {
                 const makerFee = ZeroEx.toBaseUnitAmount(new BigNumber(2), 18);
                 const takerFee = ZeroEx.toBaseUnitAmount(new BigNumber(0), 18);
                 signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                    makerToken.address, takerToken.address, makerFee, takerFee, maker, taker, fillableAmount,
-                    taker);
+                    makerToken.address,
+                    takerToken.address,
+                    makerFee,
+                    takerFee,
+                    maker,
+                    taker,
+                    fillableAmount,
+                    taker,
+                );
                 const callback = reportCallbackErrors(done)((orderState: OrderState) => {
                     done();
                 });
@@ -245,7 +291,11 @@ describe('OrderStateWatcher', () => {
                     const takerFillableAmount = ZeroEx.toBaseUnitAmount(new BigNumber(10), decimals);
                     const makerFillableAmount = ZeroEx.toBaseUnitAmount(new BigNumber(20), decimals);
                     signedOrder = await fillScenarios.createAsymmetricFillableSignedOrderAsync(
-                        makerToken.address, takerToken.address, maker, taker, makerFillableAmount,
+                        makerToken.address,
+                        takerToken.address,
+                        maker,
+                        taker,
+                        makerFillableAmount,
                         takerFillableAmount,
                     );
                     const fillAmountInBaseUnits = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
@@ -257,22 +307,31 @@ describe('OrderStateWatcher', () => {
                         expect(validOrderState.orderHash).to.be.equal(orderHash);
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            ZeroEx.toBaseUnitAmount(new BigNumber(16), decimals));
+                            ZeroEx.toBaseUnitAmount(new BigNumber(16), decimals),
+                        );
                         expect(orderRelevantState.remainingFillableTakerTokenAmount).to.be.bignumber.equal(
-                            ZeroEx.toBaseUnitAmount(new BigNumber(8), decimals));
+                            ZeroEx.toBaseUnitAmount(new BigNumber(8), decimals),
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
                     const shouldThrowOnInsufficientBalanceOrAllowance = true;
                     await zeroEx.exchange.fillOrderAsync(
-                        signedOrder, fillAmountInBaseUnits, shouldThrowOnInsufficientBalanceOrAllowance, taker,
+                        signedOrder,
+                        fillAmountInBaseUnits,
+                        shouldThrowOnInsufficientBalanceOrAllowance,
+                        taker,
                     );
                 })().catch(done);
             });
             it('should equal approved amount when approved amount is lowest', (done: DoneCallback) => {
                 (async () => {
                     signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                        makerToken.address,
+                        takerToken.address,
+                        maker,
+                        taker,
+                        fillableAmount,
                     );
 
                     const changedMakerApprovalAmount = ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals);
@@ -282,9 +341,11 @@ describe('OrderStateWatcher', () => {
                         const validOrderState = orderState as OrderStateValid;
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            changedMakerApprovalAmount);
+                            changedMakerApprovalAmount,
+                        );
                         expect(orderRelevantState.remainingFillableTakerTokenAmount).to.be.bignumber.equal(
-                            changedMakerApprovalAmount);
+                            changedMakerApprovalAmount,
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
@@ -294,7 +355,11 @@ describe('OrderStateWatcher', () => {
             it('should equal balance amount when balance amount is lowest', (done: DoneCallback) => {
                 (async () => {
                     signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                        makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                        makerToken.address,
+                        takerToken.address,
+                        maker,
+                        taker,
+                        fillableAmount,
                     );
 
                     const makerBalance = await zeroEx.token.getBalanceAsync(makerToken.address, maker);
@@ -308,14 +373,15 @@ describe('OrderStateWatcher', () => {
                         const validOrderState = orderState as OrderStateValid;
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            remainingAmount);
+                            remainingAmount,
+                        );
                         expect(orderRelevantState.remainingFillableTakerTokenAmount).to.be.bignumber.equal(
-                            remainingAmount);
+                            remainingAmount,
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
-                    await zeroEx.token.transferAsync(
-                        makerToken.address, maker, ZeroEx.NULL_ADDRESS, transferAmount);
+                    await zeroEx.token.transferAsync(makerToken.address, maker, ZeroEx.NULL_ADDRESS, transferAmount);
                 })().catch(done);
             });
             it('should equal remaining amount when partially cancelled and order has fees', (done: DoneCallback) => {
@@ -324,8 +390,15 @@ describe('OrderStateWatcher', () => {
                     const makerFee = ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals);
                     const feeRecipient = taker;
                     signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                        makerToken.address, takerToken.address, makerFee, takerFee, maker,
-                        taker, fillableAmount, feeRecipient);
+                        makerToken.address,
+                        takerToken.address,
+                        makerFee,
+                        takerFee,
+                        maker,
+                        taker,
+                        fillableAmount,
+                        feeRecipient,
+                    );
 
                     const remainingTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(4), decimals);
                     const transferTokenAmount = makerFee.sub(remainingTokenAmount);
@@ -336,7 +409,8 @@ describe('OrderStateWatcher', () => {
                         const validOrderState = orderState as OrderStateValid;
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            remainingTokenAmount);
+                            remainingTokenAmount,
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
@@ -349,8 +423,15 @@ describe('OrderStateWatcher', () => {
                     const makerFee = ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals);
                     const feeRecipient = taker;
                     signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                        makerToken.address, takerToken.address, makerFee, takerFee, maker,
-                        taker, fillableAmount, feeRecipient);
+                        makerToken.address,
+                        takerToken.address,
+                        makerFee,
+                        takerFee,
+                        maker,
+                        taker,
+                        fillableAmount,
+                        feeRecipient,
+                    );
 
                     const remainingFeeAmount = ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals);
 
@@ -362,13 +443,18 @@ describe('OrderStateWatcher', () => {
                         const validOrderState = orderState as OrderStateValid;
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            remainingFeeAmount);
+                            remainingFeeAmount,
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
                     await zeroEx.token.setProxyAllowanceAsync(zrxTokenAddress, maker, remainingFeeAmount);
                     await zeroEx.token.transferAsync(
-                        makerToken.address, maker, ZeroEx.NULL_ADDRESS, transferTokenAmount);
+                        makerToken.address,
+                        maker,
+                        ZeroEx.NULL_ADDRESS,
+                        transferTokenAmount,
+                    );
                 })().catch(done);
             });
             it('should calculate full amount when all available and non-divisible', (done: DoneCallback) => {
@@ -377,8 +463,15 @@ describe('OrderStateWatcher', () => {
                     const makerFee = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
                     const feeRecipient = taker;
                     signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                        makerToken.address, takerToken.address, makerFee, takerFee, maker,
-                        taker, fillableAmount, feeRecipient);
+                        makerToken.address,
+                        takerToken.address,
+                        makerFee,
+                        takerFee,
+                        maker,
+                        taker,
+                        fillableAmount,
+                        feeRecipient,
+                    );
 
                     zeroEx.orderStateWatcher.addOrder(signedOrder);
 
@@ -386,19 +479,27 @@ describe('OrderStateWatcher', () => {
                         const validOrderState = orderState as OrderStateValid;
                         const orderRelevantState = validOrderState.orderRelevantState;
                         expect(orderRelevantState.remainingFillableMakerTokenAmount).to.be.bignumber.equal(
-                            fillableAmount);
+                            fillableAmount,
+                        );
                         done();
                     });
                     zeroEx.orderStateWatcher.subscribe(callback);
                     await zeroEx.token.setProxyAllowanceAsync(
-                        makerToken.address, maker, ZeroEx.toBaseUnitAmount(new BigNumber(100), decimals));
+                        makerToken.address,
+                        maker,
+                        ZeroEx.toBaseUnitAmount(new BigNumber(100), decimals),
+                    );
                 })().catch(done);
             });
         });
         it('should emit orderStateInvalid when watched order cancelled', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 const orderHash = ZeroEx.getOrderHashHex(signedOrder);
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -419,7 +520,11 @@ describe('OrderStateWatcher', () => {
             (async () => {
                 const remainingFillableAmountInBaseUnits = new BigNumber(100);
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
                 const orderHash = ZeroEx.getOrderHashHex(signedOrder);
                 zeroEx.orderStateWatcher.addOrder(signedOrder);
@@ -433,14 +538,19 @@ describe('OrderStateWatcher', () => {
                 });
                 zeroEx.orderStateWatcher.subscribe(callback);
                 await zeroEx.exchange.cancelOrderAsync(
-                    signedOrder, fillableAmount.minus(remainingFillableAmountInBaseUnits),
+                    signedOrder,
+                    fillableAmount.minus(remainingFillableAmountInBaseUnits),
                 );
             })().catch(done);
         });
         it('should emit orderStateValid when watched order partially cancelled', (done: DoneCallback) => {
             (async () => {
                 signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                    makerToken.address, takerToken.address, maker, taker, fillableAmount,
+                    makerToken.address,
+                    takerToken.address,
+                    maker,
+                    taker,
+                    fillableAmount,
                 );
 
                 const cancelAmountInBaseUnits = new BigNumber(2);
diff --git a/packages/0x.js/test/order_validation_test.ts b/packages/0x.js/test/order_validation_test.ts
index b36a513fe..4e47fbc9b 100644
--- a/packages/0x.js/test/order_validation_test.ts
+++ b/packages/0x.js/test/order_validation_test.ts
@@ -1,19 +1,19 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import * as Sinon from 'sinon';
 import * as Web3 from 'web3';
 
-import {ExchangeContractErrs, SignedOrder, Token, ZeroEx, ZeroExError} from '../src';
-import {BlockParamLiteral, TradeSide, TransferType} from '../src/types';
-import {ExchangeTransferSimulator} from '../src/utils/exchange_transfer_simulator';
-import {OrderValidationUtils} from '../src/utils/order_validation_utils';
+import { ExchangeContractErrs, SignedOrder, Token, ZeroEx, ZeroExError } from '../src';
+import { BlockParamLiteral, TradeSide, TransferType } from '../src/types';
+import { ExchangeTransferSimulator } from '../src/utils/exchange_transfer_simulator';
+import { OrderValidationUtils } from '../src/utils/order_validation_utils';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {FillScenarios} from './utils/fill_scenarios';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { FillScenarios } from './utils/fill_scenarios';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -62,108 +62,152 @@ describe('OrderValidation', () => {
     describe('validateOrderFillableOrThrowAsync', () => {
         it('should succeed if the order is fillable', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
-            );
-            await zeroEx.exchange.validateOrderFillableOrThrowAsync(
-                signedOrder,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
+            await zeroEx.exchange.validateOrderFillableOrThrowAsync(signedOrder);
         });
         it('should succeed if the order is asymmetric and fillable', async () => {
             const makerFillableAmount = fillableAmount;
             const takerFillableAmount = fillableAmount.minus(4);
             const signedOrder = await fillScenarios.createAsymmetricFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-                makerFillableAmount, takerFillableAmount,
-            );
-            await zeroEx.exchange.validateOrderFillableOrThrowAsync(
-                signedOrder,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                makerFillableAmount,
+                takerFillableAmount,
             );
+            await zeroEx.exchange.validateOrderFillableOrThrowAsync(signedOrder);
         });
         it('should throw when the order is fully filled or cancelled', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             await zeroEx.exchange.cancelOrderAsync(signedOrder, fillableAmount);
-            return expect(zeroEx.exchange.validateOrderFillableOrThrowAsync(
-                signedOrder,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderRemainingFillAmountZero);
+            return expect(zeroEx.exchange.validateOrderFillableOrThrowAsync(signedOrder)).to.be.rejectedWith(
+                ExchangeContractErrs.OrderRemainingFillAmountZero,
+            );
         });
         it('should throw when order is expired', async () => {
             const expirationInPast = new BigNumber(1496826058); // 7th Jun 2017
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-                fillableAmount, expirationInPast,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
+                expirationInPast,
+            );
+            return expect(zeroEx.exchange.validateOrderFillableOrThrowAsync(signedOrder)).to.be.rejectedWith(
+                ExchangeContractErrs.OrderFillExpired,
             );
-            return expect(zeroEx.exchange.validateOrderFillableOrThrowAsync(
-                signedOrder,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderFillExpired);
         });
     });
     describe('validateFillOrderAndThrowIfInvalidAsync', () => {
         it('should throw when the fill amount is zero', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             const zeroFillAmount = new BigNumber(0);
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, zeroFillAmount, takerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(signedOrder, zeroFillAmount, takerAddress),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderFillAmountZero);
         });
         it('should throw when the signature is invalid', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             // 27 <--> 28
-            signedOrder.ecSignature.v = (28 - signedOrder.ecSignature.v) + 27;
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, fillableAmount, takerAddress,
-            )).to.be.rejectedWith(ZeroExError.InvalidSignature);
+            signedOrder.ecSignature.v = 28 - signedOrder.ecSignature.v + 27;
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(signedOrder, fillableAmount, takerAddress),
+            ).to.be.rejectedWith(ZeroExError.InvalidSignature);
         });
         it('should throw when the order is fully filled or cancelled', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             await zeroEx.exchange.cancelOrderAsync(signedOrder, fillableAmount);
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, fillableAmount, takerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderRemainingFillAmountZero);
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(signedOrder, fillableAmount, takerAddress),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderRemainingFillAmountZero);
         });
         it('should throw when sender is not a taker', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             const nonTakerAddress = userAddresses[6];
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, fillTakerAmount, nonTakerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker);
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(signedOrder, fillTakerAmount, nonTakerAddress),
+            ).to.be.rejectedWith(ExchangeContractErrs.TransactionSenderIsNotFillOrderTaker);
         });
         it('should throw when order is expired', async () => {
             const expirationInPast = new BigNumber(1496826058); // 7th Jun 2017
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-                fillableAmount, expirationInPast,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
+                expirationInPast,
             );
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, fillTakerAmount, takerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderFillExpired);
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(signedOrder, fillTakerAmount, takerAddress),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderFillExpired);
         });
         it('should throw when there a rounding error would have occurred', async () => {
             const makerAmount = new BigNumber(3);
             const takerAmount = new BigNumber(5);
             const signedOrder = await fillScenarios.createAsymmetricFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-                makerAmount, takerAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                makerAmount,
+                takerAmount,
             );
             const fillTakerAmountThatCausesRoundingError = new BigNumber(3);
-            return expect(zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
-                signedOrder, fillTakerAmountThatCausesRoundingError, takerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.OrderFillRoundingError);
+            return expect(
+                zeroEx.exchange.validateFillOrderThrowIfInvalidAsync(
+                    signedOrder,
+                    fillTakerAmountThatCausesRoundingError,
+                    takerAddress,
+                ),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderFillRoundingError);
         });
     });
     describe('#validateFillOrKillOrderAndThrowIfInvalidAsync', () => {
         it('should throw if remaining fillAmount is less then the desired fillAmount', async () => {
             const signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
             const tooLargeFillAmount = new BigNumber(7);
             const fillAmountDifference = tooLargeFillAmount.minus(fillableAmount);
@@ -172,9 +216,13 @@ describe('OrderValidation', () => {
             await zeroEx.token.transferAsync(makerTokenAddress, coinbase, makerAddress, fillAmountDifference);
             await zeroEx.token.setProxyAllowanceAsync(makerTokenAddress, makerAddress, tooLargeFillAmount);
 
-            return expect(zeroEx.exchange.validateFillOrKillOrderThrowIfInvalidAsync(
-                signedOrder, tooLargeFillAmount, takerAddress,
-            )).to.be.rejectedWith(ExchangeContractErrs.InsufficientRemainingFillAmount);
+            return expect(
+                zeroEx.exchange.validateFillOrKillOrderThrowIfInvalidAsync(
+                    signedOrder,
+                    tooLargeFillAmount,
+                    takerAddress,
+                ),
+            ).to.be.rejectedWith(ExchangeContractErrs.InsufficientRemainingFillAmount);
         });
     });
     describe('validateCancelOrderAndThrowIfInvalidAsync', () => {
@@ -186,27 +234,38 @@ describe('OrderValidation', () => {
             makerTokenAddress = makerToken.address;
             takerTokenAddress = takerToken.address;
             signedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, fillableAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
             );
         });
         it('should throw when cancel amount is zero', async () => {
             const zeroCancelAmount = new BigNumber(0);
-            return expect(zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(signedOrder, zeroCancelAmount))
-                .to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
+            return expect(
+                zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(signedOrder, zeroCancelAmount),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderCancelAmountZero);
         });
         it('should throw when order is expired', async () => {
             const expirationInPast = new BigNumber(1496826058); // 7th Jun 2017
             const expiredSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-                fillableAmount, expirationInPast,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
+                expirationInPast,
             );
-            return expect(zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(expiredSignedOrder, cancelAmount))
-                .to.be.rejectedWith(ExchangeContractErrs.OrderCancelExpired);
+            return expect(
+                zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(expiredSignedOrder, cancelAmount),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderCancelExpired);
         });
         it('should throw when order is already cancelled or filled', async () => {
             await zeroEx.exchange.cancelOrderAsync(signedOrder, fillableAmount);
-            return expect(zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(signedOrder, fillableAmount))
-                .to.be.rejectedWith(ExchangeContractErrs.OrderAlreadyCancelledOrFilled);
+            return expect(
+                zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync(signedOrder, fillableAmount),
+            ).to.be.rejectedWith(ExchangeContractErrs.OrderAlreadyCancelledOrFilled);
         });
     });
     describe('#validateFillOrderBalancesAllowancesThrowIfInvalidAsync', () => {
@@ -224,82 +283,159 @@ describe('OrderValidation', () => {
             const makerFee = new BigNumber(2);
             const takerFee = new BigNumber(2);
             const signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                makerTokenAddress, takerTokenAddress, makerFee, takerFee,
-                makerAddress, takerAddress, fillableAmount, feeRecipient,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerFee,
+                takerFee,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
+                feeRecipient,
             );
             await OrderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-                exchangeTransferSimulator, signedOrder, fillableAmount, takerAddress, zrxTokenAddress,
+                exchangeTransferSimulator,
+                signedOrder,
+                fillableAmount,
+                takerAddress,
+                zrxTokenAddress,
             );
             expect(transferFromAsync.callCount).to.be.equal(4);
             expect(
-                transferFromAsync.getCall(0).calledWith(
-                    makerTokenAddress, makerAddress, takerAddress, bigNumberMatch(fillableAmount),
-                    TradeSide.Maker, TransferType.Trade,
-                ),
+                transferFromAsync
+                    .getCall(0)
+                    .calledWith(
+                        makerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        bigNumberMatch(fillableAmount),
+                        TradeSide.Maker,
+                        TransferType.Trade,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(1).calledWith(
-                    takerTokenAddress, takerAddress, makerAddress, bigNumberMatch(fillableAmount),
-                    TradeSide.Taker, TransferType.Trade,
-                ),
+                transferFromAsync
+                    .getCall(1)
+                    .calledWith(
+                        takerTokenAddress,
+                        takerAddress,
+                        makerAddress,
+                        bigNumberMatch(fillableAmount),
+                        TradeSide.Taker,
+                        TransferType.Trade,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(2).calledWith(
-                    zrxTokenAddress, makerAddress, feeRecipient, bigNumberMatch(makerFee),
-                    TradeSide.Maker, TransferType.Fee,
-                ),
+                transferFromAsync
+                    .getCall(2)
+                    .calledWith(
+                        zrxTokenAddress,
+                        makerAddress,
+                        feeRecipient,
+                        bigNumberMatch(makerFee),
+                        TradeSide.Maker,
+                        TransferType.Fee,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(3).calledWith(
-                    zrxTokenAddress, takerAddress, feeRecipient, bigNumberMatch(takerFee),
-                    TradeSide.Taker, TransferType.Fee,
-                ),
+                transferFromAsync
+                    .getCall(3)
+                    .calledWith(
+                        zrxTokenAddress,
+                        takerAddress,
+                        feeRecipient,
+                        bigNumberMatch(takerFee),
+                        TradeSide.Taker,
+                        TransferType.Fee,
+                    ),
             ).to.be.true();
         });
         it('should call exchangeTransferSimulator.transferFrom with correct values for an open order', async () => {
             const makerFee = new BigNumber(2);
             const takerFee = new BigNumber(2);
             const signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                makerTokenAddress, takerTokenAddress, makerFee, takerFee,
-                makerAddress, ZeroEx.NULL_ADDRESS, fillableAmount, feeRecipient,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerFee,
+                takerFee,
+                makerAddress,
+                ZeroEx.NULL_ADDRESS,
+                fillableAmount,
+                feeRecipient,
             );
             await OrderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-                exchangeTransferSimulator, signedOrder, fillableAmount, takerAddress, zrxTokenAddress,
+                exchangeTransferSimulator,
+                signedOrder,
+                fillableAmount,
+                takerAddress,
+                zrxTokenAddress,
             );
             expect(transferFromAsync.callCount).to.be.equal(4);
             expect(
-                transferFromAsync.getCall(0).calledWith(
-                    makerTokenAddress, makerAddress, takerAddress, bigNumberMatch(fillableAmount),
-                    TradeSide.Maker, TransferType.Trade,
-                ),
+                transferFromAsync
+                    .getCall(0)
+                    .calledWith(
+                        makerTokenAddress,
+                        makerAddress,
+                        takerAddress,
+                        bigNumberMatch(fillableAmount),
+                        TradeSide.Maker,
+                        TransferType.Trade,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(1).calledWith(
-                    takerTokenAddress, takerAddress, makerAddress, bigNumberMatch(fillableAmount),
-                    TradeSide.Taker, TransferType.Trade,
-                ),
+                transferFromAsync
+                    .getCall(1)
+                    .calledWith(
+                        takerTokenAddress,
+                        takerAddress,
+                        makerAddress,
+                        bigNumberMatch(fillableAmount),
+                        TradeSide.Taker,
+                        TransferType.Trade,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(2).calledWith(
-                    zrxTokenAddress, makerAddress, feeRecipient, bigNumberMatch(makerFee),
-                    TradeSide.Maker, TransferType.Fee,
-                ),
+                transferFromAsync
+                    .getCall(2)
+                    .calledWith(
+                        zrxTokenAddress,
+                        makerAddress,
+                        feeRecipient,
+                        bigNumberMatch(makerFee),
+                        TradeSide.Maker,
+                        TransferType.Fee,
+                    ),
             ).to.be.true();
             expect(
-                transferFromAsync.getCall(3).calledWith(
-                    zrxTokenAddress, takerAddress, feeRecipient, bigNumberMatch(takerFee),
-                    TradeSide.Taker, TransferType.Fee,
-                ),
+                transferFromAsync
+                    .getCall(3)
+                    .calledWith(
+                        zrxTokenAddress,
+                        takerAddress,
+                        feeRecipient,
+                        bigNumberMatch(takerFee),
+                        TradeSide.Taker,
+                        TransferType.Fee,
+                    ),
             ).to.be.true();
         });
         it('should correctly round the fillMakerTokenAmount', async () => {
             const makerTokenAmount = new BigNumber(3);
             const takerTokenAmount = new BigNumber(1);
             const signedOrder = await fillScenarios.createAsymmetricFillableSignedOrderAsync(
-                makerTokenAddress, takerTokenAddress, makerAddress, takerAddress, makerTokenAmount, takerTokenAmount,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerAddress,
+                takerAddress,
+                makerTokenAmount,
+                takerTokenAmount,
             );
             await OrderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-                exchangeTransferSimulator, signedOrder, takerTokenAmount, takerAddress, zrxTokenAddress,
+                exchangeTransferSimulator,
+                signedOrder,
+                takerTokenAmount,
+                takerAddress,
+                zrxTokenAddress,
             );
             expect(transferFromAsync.callCount).to.be.equal(4);
             const makerFillAmount = transferFromAsync.getCall(0).args[3];
@@ -309,12 +445,22 @@ describe('OrderValidation', () => {
             const makerFee = new BigNumber(2);
             const takerFee = new BigNumber(4);
             const signedOrder = await fillScenarios.createFillableSignedOrderWithFeesAsync(
-                makerTokenAddress, takerTokenAddress, makerFee, takerFee, makerAddress, takerAddress,
-                fillableAmount, ZeroEx.NULL_ADDRESS,
+                makerTokenAddress,
+                takerTokenAddress,
+                makerFee,
+                takerFee,
+                makerAddress,
+                takerAddress,
+                fillableAmount,
+                ZeroEx.NULL_ADDRESS,
             );
             const fillTakerTokenAmount = fillableAmount.div(2).round(0);
             await OrderValidationUtils.validateFillOrderBalancesAllowancesThrowIfInvalidAsync(
-                exchangeTransferSimulator, signedOrder, fillTakerTokenAmount, takerAddress, zrxTokenAddress,
+                exchangeTransferSimulator,
+                signedOrder,
+                fillTakerTokenAmount,
+                takerAddress,
+                zrxTokenAddress,
             );
             const makerPartialFee = makerFee.div(2);
             const takerPartialFee = takerFee.div(2);
diff --git a/packages/0x.js/test/remaining_fillable_calculator_test.ts b/packages/0x.js/test/remaining_fillable_calculator_test.ts
index 95ef0a4f1..30b70995d 100644
--- a/packages/0x.js/test/remaining_fillable_calculator_test.ts
+++ b/packages/0x.js/test/remaining_fillable_calculator_test.ts
@@ -2,11 +2,11 @@ import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import 'mocha';
 
-import {ZeroEx} from '../src/0x';
-import {RemainingFillableCalculator} from '../src/order_watcher/remaining_fillable_calculator';
-import {ECSignature, SignedOrder} from '../src/types';
+import { ZeroEx } from '../src/0x';
+import { RemainingFillableCalculator } from '../src/order_watcher/remaining_fillable_calculator';
+import { ECSignature, SignedOrder } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
+import { chaiSetup } from './utils/chai_setup';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -26,29 +26,34 @@ describe('RemainingFillableCalculator', () => {
     const decimals: number = 4;
     const zero: BigNumber = new BigNumber(0);
     const zeroAddress = '0x0';
-    const signature: ECSignature = {v: 27, r: '', s: ''};
+    const signature: ECSignature = { v: 27, r: '', s: '' };
     beforeEach(async () => {
-        [makerAmount, takerAmount, makerFeeAmount] = [ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
-                                                      ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals),
-                                                      ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals)];
+        [makerAmount, takerAmount, makerFeeAmount] = [
+            ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
+            ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals),
+            ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals),
+        ];
         [transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount] = [
-                                                ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
-                                                ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals)];
+            ZeroEx.toBaseUnitAmount(new BigNumber(50), decimals),
+            ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals),
+        ];
     });
     function buildSignedOrder(): SignedOrder {
-        return { ecSignature: signature,
-                 exchangeContractAddress: zeroAddress,
-                 feeRecipient: zeroAddress,
-                 maker: zeroAddress,
-                 taker: zeroAddress,
-                 makerFee: makerFeeAmount,
-                 takerFee: zero,
-                 makerTokenAmount: makerAmount,
-                 takerTokenAmount: takerAmount,
-                 makerTokenAddress: makerToken,
-                 takerTokenAddress: takerToken,
-                 salt: zero,
-                 expirationUnixTimestampSec: zero };
+        return {
+            ecSignature: signature,
+            exchangeContractAddress: zeroAddress,
+            feeRecipient: zeroAddress,
+            maker: zeroAddress,
+            taker: zeroAddress,
+            makerFee: makerFeeAmount,
+            takerFee: zero,
+            makerTokenAmount: makerAmount,
+            takerTokenAmount: takerAmount,
+            makerTokenAddress: makerToken,
+            takerTokenAddress: takerToken,
+            salt: zero,
+            expirationUnixTimestampSec: zero,
+        };
     }
     describe('Maker token is NOT ZRX', () => {
         before(async () => {
@@ -57,23 +62,38 @@ describe('RemainingFillableCalculator', () => {
         it('calculates the correct amount when unfilled and funds available', () => {
             signedOrder = buildSignedOrder();
             remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
         });
         it('calculates the correct amount when partially filled and funds available', () => {
             signedOrder = buildSignedOrder();
             remainingMakerTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals);
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
         });
         it('calculates the amount to be 0 when all fee funds are transferred', () => {
             signedOrder = buildSignedOrder();
             transferrableMakerFeeTokenAmount = zero;
             remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(zero);
         });
         it('calculates the correct amount when balance is less than remaining fillable', () => {
@@ -81,41 +101,58 @@ describe('RemainingFillableCalculator', () => {
             const partiallyFilledAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
             remainingMakerTokenAmount = signedOrder.makerTokenAmount.minus(partiallyFilledAmount);
             transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(partiallyFilledAmount);
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(transferrableMakerTokenAmount);
         });
         describe('Order to Fee Ratio is < 1', () => {
             beforeEach(async () => {
-                [makerAmount, takerAmount, makerFeeAmount] = [ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
-                                                              ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals),
-                                                              ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals)];
+                [makerAmount, takerAmount, makerFeeAmount] = [
+                    ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
+                    ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals),
+                    ZeroEx.toBaseUnitAmount(new BigNumber(6), decimals),
+                ];
             });
             it('calculates the correct amount when funds unavailable', () => {
                 signedOrder = buildSignedOrder();
                 remainingMakerTokenAmount = signedOrder.makerTokenAmount;
                 const transferredAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
                 transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(transferredAmount);
-                calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                                 transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount,
-                                 remainingMakerTokenAmount);
+                calculator = new RemainingFillableCalculator(
+                    signedOrder,
+                    isMakerTokenZRX,
+                    transferrableMakerTokenAmount,
+                    transferrableMakerFeeTokenAmount,
+                    remainingMakerTokenAmount,
+                );
                 expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(transferrableMakerTokenAmount);
             });
         });
         describe('Ratio is not evenly divisble', () => {
             beforeEach(async () => {
-                [makerAmount, takerAmount, makerFeeAmount] = [ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
-                                                              ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals),
-                                                              ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals)];
+                [makerAmount, takerAmount, makerFeeAmount] = [
+                    ZeroEx.toBaseUnitAmount(new BigNumber(3), decimals),
+                    ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals),
+                    ZeroEx.toBaseUnitAmount(new BigNumber(7), decimals),
+                ];
             });
             it('calculates the correct amount when funds unavailable', () => {
                 signedOrder = buildSignedOrder();
                 remainingMakerTokenAmount = signedOrder.makerTokenAmount;
                 const transferredAmount = ZeroEx.toBaseUnitAmount(new BigNumber(2), decimals);
                 transferrableMakerTokenAmount = remainingMakerTokenAmount.minus(transferredAmount);
-                calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                                 transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount,
-                                 remainingMakerTokenAmount);
+                calculator = new RemainingFillableCalculator(
+                    signedOrder,
+                    isMakerTokenZRX,
+                    transferrableMakerTokenAmount,
+                    transferrableMakerFeeTokenAmount,
+                    remainingMakerTokenAmount,
+                );
                 const calculatedFillableAmount = calculator.computeRemainingMakerFillable();
                 expect(calculatedFillableAmount.lessThanOrEqualTo(transferrableMakerTokenAmount)).to.be.true();
                 expect(calculatedFillableAmount).to.be.bignumber.greaterThan(new BigNumber(0));
@@ -134,15 +171,25 @@ describe('RemainingFillableCalculator', () => {
             transferrableMakerTokenAmount = makerAmount.plus(makerFeeAmount);
             transferrableMakerFeeTokenAmount = transferrableMakerTokenAmount;
             remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
         });
         it('calculates the correct amount when partially filled and funds available', () => {
             signedOrder = buildSignedOrder();
             remainingMakerTokenAmount = ZeroEx.toBaseUnitAmount(new BigNumber(1), decimals);
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(remainingMakerTokenAmount);
         });
         it('calculates the amount to be 0 when all fee funds are transferred', () => {
@@ -150,8 +197,13 @@ describe('RemainingFillableCalculator', () => {
             transferrableMakerTokenAmount = zero;
             transferrableMakerFeeTokenAmount = zero;
             remainingMakerTokenAmount = signedOrder.makerTokenAmount;
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             expect(calculator.computeRemainingMakerFillable()).to.be.bignumber.equal(zero);
         });
         it('calculates the correct amount when balance is less than remaining fillable', () => {
@@ -163,8 +215,13 @@ describe('RemainingFillableCalculator', () => {
 
             const orderToFeeRatio = signedOrder.makerTokenAmount.dividedToIntegerBy(signedOrder.makerFee);
             const expectedFillableAmount = new BigNumber(450980);
-            calculator = new RemainingFillableCalculator(signedOrder, isMakerTokenZRX,
-                           transferrableMakerTokenAmount, transferrableMakerFeeTokenAmount, remainingMakerTokenAmount);
+            calculator = new RemainingFillableCalculator(
+                signedOrder,
+                isMakerTokenZRX,
+                transferrableMakerTokenAmount,
+                transferrableMakerFeeTokenAmount,
+                remainingMakerTokenAmount,
+            );
             const calculatedFillableAmount = calculator.computeRemainingMakerFillable();
             const numberOfFillsInRatio = calculatedFillableAmount.dividedToIntegerBy(orderToFeeRatio);
             const calculatedFillableAmountPlusFees = calculatedFillableAmount.plus(numberOfFillsInRatio);
diff --git a/packages/0x.js/test/subscription_test.ts b/packages/0x.js/test/subscription_test.ts
index 43e6b63b6..269d8ae89 100644
--- a/packages/0x.js/test/subscription_test.ts
+++ b/packages/0x.js/test/subscription_test.ts
@@ -1,4 +1,4 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import * as _ from 'lodash';
@@ -6,19 +6,13 @@ import 'mocha';
 import * as Sinon from 'sinon';
 import * as Web3 from 'web3';
 
-import {
-    ApprovalContractEventArgs,
-    DecodedLogEvent,
-    Token,
-    TokenEvents,
-    ZeroEx,
-} from '../src';
-import {DoneCallback} from '../src/types';
+import { ApprovalContractEventArgs, DecodedLogEvent, Token, TokenEvents, ZeroEx } from '../src';
+import { DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {reportCallbackErrors} from './utils/report_callback_errors';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { reportCallbackErrors } from './utils/report_callback_errors';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -72,12 +66,8 @@ describe('SubscriptionTest', () => {
                         done();
                     },
                 );
-                stubs = [
-                  Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync')
-                   .throws(new Error(errMsg)),
-                ];
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
+                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync').throws(new Error(errMsg))];
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
                 await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
             })().catch(done);
         });
@@ -91,24 +81,16 @@ describe('SubscriptionTest', () => {
                         done();
                     },
                 );
-                stubs = [
-                  Sinon.stub((zeroEx as any)._web3Wrapper, 'getLogsAsync')
-                   .throws(new Error(errMsg)),
-                ];
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
+                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getLogsAsync').throws(new Error(errMsg))];
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
                 await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
             })().catch(done);
         });
         it('Should allow unsubscribeAll to be called successfully after an error', (done: DoneCallback) => {
             (async () => {
                 const callback = (err: Error, logEvent: DecodedLogEvent<ApprovalContractEventArgs>) => _.noop;
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
-                stubs = [
-                  Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync')
-                   .throws(new Error('JSON RPC error')),
-                ];
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
+                stubs = [Sinon.stub((zeroEx as any)._web3Wrapper, 'getBlockAsync').throws(new Error('JSON RPC error'))];
                 zeroEx.token.unsubscribeAll();
                 done();
             })().catch(done);
diff --git a/packages/0x.js/test/token_registry_wrapper_test.ts b/packages/0x.js/test/token_registry_wrapper_test.ts
index 533384450..0a170db8f 100644
--- a/packages/0x.js/test/token_registry_wrapper_test.ts
+++ b/packages/0x.js/test/token_registry_wrapper_test.ts
@@ -1,14 +1,14 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
-import {schemas, SchemaValidator} from '@0xproject/json-schemas';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
+import { schemas, SchemaValidator } from '@0xproject/json-schemas';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
 
-import {Token, ZeroEx} from '../src';
+import { Token, ZeroEx } from '../src';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -19,10 +19,10 @@ const TOKEN_REGISTRY_SIZE_AFTER_MIGRATION = 7;
 describe('TokenRegistryWrapper', () => {
     let zeroEx: ZeroEx;
     let tokens: Token[];
-    const tokenAddressBySymbol: {[symbol: string]: string} = {};
-    const tokenAddressByName: {[symbol: string]: string} = {};
-    const tokenBySymbol: {[symbol: string]: Token} = {};
-    const tokenByName: {[symbol: string]: Token} = {};
+    const tokenAddressBySymbol: { [symbol: string]: string } = {};
+    const tokenAddressByName: { [symbol: string]: string } = {};
+    const tokenBySymbol: { [symbol: string]: Token } = {};
+    const tokenByName: { [symbol: string]: Token } = {};
     const registeredSymbol = 'ZRX';
     const registeredName = '0x Protocol Token';
     const unregisteredSymbol = 'MAL';
diff --git a/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts b/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts
index 9674b64ac..15bd7a8ba 100644
--- a/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts
+++ b/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts
@@ -1,10 +1,10 @@
 import * as chai from 'chai';
 
-import {ZeroEx} from '../src';
+import { ZeroEx } from '../src';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
diff --git a/packages/0x.js/test/token_wrapper_test.ts b/packages/0x.js/test/token_wrapper_test.ts
index a43cef675..11af7d24c 100644
--- a/packages/0x.js/test/token_wrapper_test.ts
+++ b/packages/0x.js/test/token_wrapper_test.ts
@@ -1,5 +1,5 @@
-import {BlockchainLifecycle} from '@0xproject/dev-utils';
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { BlockchainLifecycle } from '@0xproject/dev-utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 import * as chai from 'chai';
 import 'mocha';
@@ -16,12 +16,12 @@ import {
     ZeroEx,
     ZeroExError,
 } from '../src';
-import {DoneCallback} from '../src/types';
+import { DoneCallback } from '../src/types';
 
-import {chaiSetup} from './utils/chai_setup';
-import {constants} from './utils/constants';
-import {TokenUtils} from './utils/token_utils';
-import {web3Factory} from './utils/web3_factory';
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { TokenUtils } from './utils/token_utils';
+import { web3Factory } from './utils/web3_factory';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -74,17 +74,17 @@ describe('TokenWrapper', () => {
         it('should fail to transfer tokens if fromAddress has an insufficient balance', async () => {
             const fromAddress = addressWithoutFunds;
             const toAddress = coinbase;
-            return expect(zeroEx.token.transferAsync(
-                token.address, fromAddress, toAddress, transferAmount,
-            )).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
+            return expect(
+                zeroEx.token.transferAsync(token.address, fromAddress, toAddress, transferAmount),
+            ).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
         });
         it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
             const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
             const fromAddress = coinbase;
             const toAddress = coinbase;
-            return expect(zeroEx.token.transferAsync(
-                nonExistentTokenAddress, fromAddress, toAddress, transferAmount,
-            )).to.be.rejectedWith(ZeroExError.TokenContractDoesNotExist);
+            return expect(
+                zeroEx.token.transferAsync(nonExistentTokenAddress, fromAddress, toAddress, transferAmount),
+            ).to.be.rejectedWith(ZeroExError.TokenContractDoesNotExist);
         });
     });
     describe('#transferFromAsync', () => {
@@ -103,24 +103,22 @@ describe('TokenWrapper', () => {
             const fromAddressBalance = await zeroEx.token.getBalanceAsync(token.address, fromAddress);
             expect(fromAddressBalance).to.be.bignumber.greaterThan(transferAmount);
 
-            const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(token.address, fromAddress,
-                                                                              toAddress);
+            const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(token.address, fromAddress, toAddress);
             expect(fromAddressAllowance).to.be.bignumber.equal(0);
 
-            return expect(zeroEx.token.transferFromAsync(
-                token.address, fromAddress, toAddress, senderAddress, transferAmount,
-            )).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
+            return expect(
+                zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress, transferAmount),
+            ).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
         });
-        it('[regression] should fail to transfer tokens if set allowance for toAddress instead of senderAddress',
-            async () => {
+        it('[regression] should fail to transfer tokens if set allowance for toAddress instead of senderAddress', async () => {
             const fromAddress = coinbase;
             const transferAmount = new BigNumber(42);
 
             await zeroEx.token.setAllowanceAsync(token.address, fromAddress, toAddress, transferAmount);
 
-            return expect(zeroEx.token.transferFromAsync(
-                token.address, fromAddress, toAddress, senderAddress, transferAmount,
-            )).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
+            return expect(
+                zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress, transferAmount),
+            ).to.be.rejectedWith(ZeroExError.InsufficientAllowanceForTransfer);
         });
         it('should fail to transfer tokens if fromAddress has insufficient balance', async () => {
             const fromAddress = addressWithoutFunds;
@@ -130,13 +128,16 @@ describe('TokenWrapper', () => {
             expect(fromAddressBalance).to.be.bignumber.equal(0);
 
             await zeroEx.token.setAllowanceAsync(token.address, fromAddress, senderAddress, transferAmount);
-            const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(token.address, fromAddress,
-                                                                              senderAddress);
+            const fromAddressAllowance = await zeroEx.token.getAllowanceAsync(
+                token.address,
+                fromAddress,
+                senderAddress,
+            );
             expect(fromAddressAllowance).to.be.bignumber.equal(transferAmount);
 
-            return expect(zeroEx.token.transferFromAsync(
-                token.address, fromAddress, toAddress, senderAddress, transferAmount,
-            )).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
+            return expect(
+                zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress, transferAmount),
+            ).to.be.rejectedWith(ZeroExError.InsufficientBalanceForTransfer);
         });
         it('should successfully transfer tokens', async () => {
             const fromAddress = coinbase;
@@ -147,17 +148,22 @@ describe('TokenWrapper', () => {
             const transferAmount = new BigNumber(42);
             await zeroEx.token.setAllowanceAsync(token.address, fromAddress, senderAddress, transferAmount);
 
-            await zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress,
-                                                 transferAmount);
+            await zeroEx.token.transferFromAsync(token.address, fromAddress, toAddress, senderAddress, transferAmount);
             const postBalance = await zeroEx.token.getBalanceAsync(token.address, toAddress);
             return expect(postBalance).to.be.bignumber.equal(transferAmount);
         });
         it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
             const fromAddress = coinbase;
             const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
-            return expect(zeroEx.token.transferFromAsync(
-                nonExistentTokenAddress, fromAddress, toAddress, senderAddress, new BigNumber(42),
-            )).to.be.rejectedWith(ZeroExError.TokenContractDoesNotExist);
+            return expect(
+                zeroEx.token.transferFromAsync(
+                    nonExistentTokenAddress,
+                    fromAddress,
+                    toAddress,
+                    senderAddress,
+                    new BigNumber(42),
+                ),
+            ).to.be.rejectedWith(ZeroExError.TokenContractDoesNotExist);
         });
     });
     describe('#getBalanceAsync', () => {
@@ -172,8 +178,9 @@ describe('TokenWrapper', () => {
             it('should throw a CONTRACT_DOES_NOT_EXIST error for a non-existent token contract', async () => {
                 const nonExistentTokenAddress = '0x9dd402f14d67e001d8efbe6583e51bf9706aa065';
                 const ownerAddress = coinbase;
-                return expect(zeroEx.token.getBalanceAsync(nonExistentTokenAddress, ownerAddress))
-                    .to.be.rejectedWith(ZeroExError.TokenContractDoesNotExist);
+                return expect(zeroEx.token.getBalanceAsync(nonExistentTokenAddress, ownerAddress)).to.be.rejectedWith(
+                    ZeroExError.TokenContractDoesNotExist,
+                );
             });
             it('should return a balance of 0 for a non-existent owner address', async () => {
                 const token = tokens[0];
@@ -191,22 +198,25 @@ describe('TokenWrapper', () => {
                 zeroExWithoutAccounts = new ZeroEx(web3WithoutAccounts.currentProvider, config);
             });
             it('should return balance even when called with Web3 provider instance without addresses', async () => {
-                    const token = tokens[0];
-                    const ownerAddress = coinbase;
-                    const balance = await zeroExWithoutAccounts.token.getBalanceAsync(token.address, ownerAddress);
-                    const expectedBalance = new BigNumber('1000000000000000000000000000');
-                    return expect(balance).to.be.bignumber.equal(expectedBalance);
+                const token = tokens[0];
+                const ownerAddress = coinbase;
+                const balance = await zeroExWithoutAccounts.token.getBalanceAsync(token.address, ownerAddress);
+                const expectedBalance = new BigNumber('1000000000000000000000000000');
+                return expect(balance).to.be.bignumber.equal(expectedBalance);
             });
         });
     });
     describe('#setAllowanceAsync', () => {
-        it('should set the spender\'s allowance', async () => {
+        it("should set the spender's allowance", async () => {
             const token = tokens[0];
             const ownerAddress = coinbase;
             const spenderAddress = addressWithoutFunds;
 
-            const allowanceBeforeSet = await zeroEx.token.getAllowanceAsync(token.address, ownerAddress,
-                                                                            spenderAddress);
+            const allowanceBeforeSet = await zeroEx.token.getAllowanceAsync(
+                token.address,
+                ownerAddress,
+                spenderAddress,
+            );
             const expectedAllowanceBeforeAllowanceSet = new BigNumber(0);
             expect(allowanceBeforeSet).to.be.bignumber.equal(expectedAllowanceBeforeAllowanceSet);
 
@@ -219,7 +229,7 @@ describe('TokenWrapper', () => {
         });
     });
     describe('#setUnlimitedAllowanceAsync', () => {
-        it('should set the unlimited spender\'s allowance', async () => {
+        it("should set the unlimited spender's allowance", async () => {
             const token = tokens[0];
             const ownerAddress = coinbase;
             const spenderAddress = addressWithoutFunds;
@@ -241,10 +251,18 @@ describe('TokenWrapper', () => {
             );
 
             await zeroEx.token.transferFromAsync(
-                zrx.address, coinbase, userWithNormalAllowance, userWithNormalAllowance, transferAmount,
+                zrx.address,
+                coinbase,
+                userWithNormalAllowance,
+                userWithNormalAllowance,
+                transferAmount,
             );
             await zeroEx.token.transferFromAsync(
-                zrx.address, coinbase, userWithUnlimitedAllowance, userWithUnlimitedAllowance, transferAmount,
+                zrx.address,
+                coinbase,
+                userWithUnlimitedAllowance,
+                userWithUnlimitedAllowance,
+                transferAmount,
             );
 
             const finalBalanceWithNormalAllowance = await web3Wrapper.getBalanceInWeiAsync(userWithNormalAllowance);
@@ -300,7 +318,9 @@ describe('TokenWrapper', () => {
                 await zeroEx.token.setAllowanceAsync(token.address, ownerAddress, spenderAddress, amountInBaseUnits);
 
                 const allowance = await zeroExWithoutAccounts.token.getAllowanceAsync(
-                    token.address, ownerAddress, spenderAddress,
+                    token.address,
+                    ownerAddress,
+                    spenderAddress,
                 );
                 const expectedAllowance = amountInBaseUnits;
                 return expect(allowance).to.be.bignumber.equal(expectedAllowance);
@@ -378,8 +398,7 @@ describe('TokenWrapper', () => {
                     expect(args._value).to.be.bignumber.equal(transferAmount);
                     done();
                 };
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Transfer, indexFilterValues, callback);
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Transfer, indexFilterValues, callback);
                 await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
             })().catch(done);
         });
@@ -394,8 +413,7 @@ describe('TokenWrapper', () => {
                     expect(args._value).to.be.bignumber.equal(allowanceAmount);
                     done();
                 };
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Approval, indexFilterValues, callback);
                 await zeroEx.token.setAllowanceAsync(tokenAddress, coinbase, addressWithoutFunds, allowanceAmount);
             })().catch(done);
         });
@@ -404,17 +422,13 @@ describe('TokenWrapper', () => {
                 const callbackNeverToBeCalled = (err: Error, logEvent: DecodedLogEvent<ApprovalContractEventArgs>) => {
                     done(new Error('Expected this subscription to have been cancelled'));
                 };
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled,
-                );
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled);
                 const callbackToBeCalled = (err: Error, logEvent: DecodedLogEvent<ApprovalContractEventArgs>) => {
                     done();
                 };
                 const newProvider = web3Factory.getRpcProvider();
                 zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
-                zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackToBeCalled,
-                );
+                zeroEx.token.subscribe(tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackToBeCalled);
                 await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
             })().catch(done);
         });
@@ -424,7 +438,11 @@ describe('TokenWrapper', () => {
                     done(new Error('Expected this subscription to have been cancelled'));
                 };
                 const subscriptionToken = zeroEx.token.subscribe(
-                    tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled);
+                    tokenAddress,
+                    TokenEvents.Transfer,
+                    indexFilterValues,
+                    callbackNeverToBeCalled,
+                );
                 zeroEx.token.unsubscribe(subscriptionToken);
                 await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
                 done();
@@ -450,7 +468,10 @@ describe('TokenWrapper', () => {
             const eventName = TokenEvents.Approval;
             const indexFilterValues = {};
             const logs = await zeroEx.token.getLogsAsync<ApprovalContractEventArgs>(
-                tokenAddress, eventName, blockRange, indexFilterValues,
+                tokenAddress,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
@@ -465,7 +486,10 @@ describe('TokenWrapper', () => {
             const differentEventName = TokenEvents.Transfer;
             const indexFilterValues = {};
             const logs = await zeroEx.token.getLogsAsync(
-                tokenAddress, differentEventName, blockRange, indexFilterValues,
+                tokenAddress,
+                differentEventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(0);
         });
@@ -479,7 +503,10 @@ describe('TokenWrapper', () => {
                 _owner: coinbase,
             };
             const logs = await zeroEx.token.getLogsAsync<ApprovalContractEventArgs>(
-                tokenAddress, eventName, blockRange, indexFilterValues,
+                tokenAddress,
+                eventName,
+                blockRange,
+                indexFilterValues,
             );
             expect(logs).to.have.length(1);
             const args = logs[0].args;
@@ -487,3 +514,4 @@ describe('TokenWrapper', () => {
         });
     });
 });
+// tslint:disable:max-file-line-count
diff --git a/packages/0x.js/test/utils/fill_scenarios.ts b/packages/0x.js/test/utils/fill_scenarios.ts
index 8f28ee503..734db8ee6 100644
--- a/packages/0x.js/test/utils/fill_scenarios.ts
+++ b/packages/0x.js/test/utils/fill_scenarios.ts
@@ -1,12 +1,12 @@
-import {Web3Wrapper} from '@0xproject/web3-wrapper';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import BigNumber from 'bignumber.js';
 
-import {SignedOrder, Token, ZeroEx} from '../../src';
-import {artifacts} from '../../src/artifacts';
-import {DummyTokenContract} from '../../src/contract_wrappers/generated/dummy_token';
-import {orderFactory} from '../utils/order_factory';
+import { SignedOrder, Token, ZeroEx } from '../../src';
+import { artifacts } from '../../src/artifacts';
+import { DummyTokenContract } from '../../src/contract_wrappers/generated/dummy_token';
+import { orderFactory } from '../utils/order_factory';
 
-import {constants} from './constants';
+import { constants } from './constants';
 
 const INITIAL_COINBASE_TOKEN_SUPPLY_IN_UNITS = new BigNumber(100);
 
@@ -17,8 +17,13 @@ export class FillScenarios {
     private _coinbase: string;
     private _zrxTokenAddress: string;
     private _exchangeContractAddress: string;
-    constructor(zeroEx: ZeroEx, userAddresses: string[],
-                tokens: Token[], zrxTokenAddress: string, exchangeContractAddress: string) {
+    constructor(
+        zeroEx: ZeroEx,
+        userAddresses: string[],
+        tokens: Token[],
+        zrxTokenAddress: string,
+        exchangeContractAddress: string,
+    ) {
         this._zeroEx = zeroEx;
         this._userAddresses = userAddresses;
         this._tokens = tokens;
@@ -31,7 +36,8 @@ export class FillScenarios {
         for (const token of this._tokens) {
             if (token.symbol !== 'ZRX' && token.symbol !== 'WETH') {
                 const contractInstance = web3Wrapper.getContractInstance(
-                    artifacts.DummyTokenArtifact.abi, token.address,
+                    artifacts.DummyTokenArtifact.abi,
+                    token.address,
                 );
                 const defaults = {};
                 const dummyToken = new DummyTokenContract(contractInstance, defaults);
@@ -43,61 +49,110 @@ export class FillScenarios {
             }
         }
     }
-    public async createFillableSignedOrderAsync(makerTokenAddress: string, takerTokenAddress: string,
-                                                makerAddress: string, takerAddress: string,
-                                                fillableAmount: BigNumber,
-                                                expirationUnixTimestampSec?: BigNumber):
-                                           Promise<SignedOrder> {
+    public async createFillableSignedOrderAsync(
+        makerTokenAddress: string,
+        takerTokenAddress: string,
+        makerAddress: string,
+        takerAddress: string,
+        fillableAmount: BigNumber,
+        expirationUnixTimestampSec?: BigNumber,
+    ): Promise<SignedOrder> {
         return this.createAsymmetricFillableSignedOrderAsync(
-            makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-            fillableAmount, fillableAmount, expirationUnixTimestampSec,
+            makerTokenAddress,
+            takerTokenAddress,
+            makerAddress,
+            takerAddress,
+            fillableAmount,
+            fillableAmount,
+            expirationUnixTimestampSec,
         );
     }
     public async createFillableSignedOrderWithFeesAsync(
-        makerTokenAddress: string, takerTokenAddress: string,
-        makerFee: BigNumber, takerFee: BigNumber,
-        makerAddress: string, takerAddress: string,
+        makerTokenAddress: string,
+        takerTokenAddress: string,
+        makerFee: BigNumber,
+        takerFee: BigNumber,
+        makerAddress: string,
+        takerAddress: string,
         fillableAmount: BigNumber,
-        feeRecepient: string, expirationUnixTimestampSec?: BigNumber,
+        feeRecepient: string,
+        expirationUnixTimestampSec?: BigNumber,
     ): Promise<SignedOrder> {
         return this._createAsymmetricFillableSignedOrderWithFeesAsync(
-            makerTokenAddress, takerTokenAddress, makerFee, takerFee, makerAddress, takerAddress,
-            fillableAmount, fillableAmount, feeRecepient, expirationUnixTimestampSec,
+            makerTokenAddress,
+            takerTokenAddress,
+            makerFee,
+            takerFee,
+            makerAddress,
+            takerAddress,
+            fillableAmount,
+            fillableAmount,
+            feeRecepient,
+            expirationUnixTimestampSec,
         );
     }
     public async createAsymmetricFillableSignedOrderAsync(
-        makerTokenAddress: string, takerTokenAddress: string, makerAddress: string, takerAddress: string,
-        makerFillableAmount: BigNumber, takerFillableAmount: BigNumber,
-        expirationUnixTimestampSec?: BigNumber): Promise<SignedOrder> {
+        makerTokenAddress: string,
+        takerTokenAddress: string,
+        makerAddress: string,
+        takerAddress: string,
+        makerFillableAmount: BigNumber,
+        takerFillableAmount: BigNumber,
+        expirationUnixTimestampSec?: BigNumber,
+    ): Promise<SignedOrder> {
         const makerFee = new BigNumber(0);
         const takerFee = new BigNumber(0);
         const feeRecepient = constants.NULL_ADDRESS;
         return this._createAsymmetricFillableSignedOrderWithFeesAsync(
-            makerTokenAddress, takerTokenAddress, makerFee, takerFee, makerAddress, takerAddress,
-            makerFillableAmount, takerFillableAmount, feeRecepient, expirationUnixTimestampSec,
+            makerTokenAddress,
+            takerTokenAddress,
+            makerFee,
+            takerFee,
+            makerAddress,
+            takerAddress,
+            makerFillableAmount,
+            takerFillableAmount,
+            feeRecepient,
+            expirationUnixTimestampSec,
         );
     }
-    public async createPartiallyFilledSignedOrderAsync(makerTokenAddress: string, takerTokenAddress: string,
-                                                       takerAddress: string, fillableAmount: BigNumber,
-                                                       partialFillAmount: BigNumber) {
+    public async createPartiallyFilledSignedOrderAsync(
+        makerTokenAddress: string,
+        takerTokenAddress: string,
+        takerAddress: string,
+        fillableAmount: BigNumber,
+        partialFillAmount: BigNumber,
+    ) {
         const [makerAddress] = this._userAddresses;
         const signedOrder = await this.createAsymmetricFillableSignedOrderAsync(
-            makerTokenAddress, takerTokenAddress, makerAddress, takerAddress,
-            fillableAmount, fillableAmount,
+            makerTokenAddress,
+            takerTokenAddress,
+            makerAddress,
+            takerAddress,
+            fillableAmount,
+            fillableAmount,
         );
         const shouldThrowOnInsufficientBalanceOrAllowance = false;
         await this._zeroEx.exchange.fillOrderAsync(
-            signedOrder, partialFillAmount, shouldThrowOnInsufficientBalanceOrAllowance, takerAddress,
+            signedOrder,
+            partialFillAmount,
+            shouldThrowOnInsufficientBalanceOrAllowance,
+            takerAddress,
         );
         return signedOrder;
     }
     private async _createAsymmetricFillableSignedOrderWithFeesAsync(
-        makerTokenAddress: string, takerTokenAddress: string,
-        makerFee: BigNumber, takerFee: BigNumber,
-        makerAddress: string, takerAddress: string,
-        makerFillableAmount: BigNumber, takerFillableAmount: BigNumber,
-        feeRecepient: string, expirationUnixTimestampSec?: BigNumber): Promise<SignedOrder> {
-
+        makerTokenAddress: string,
+        takerTokenAddress: string,
+        makerFee: BigNumber,
+        takerFee: BigNumber,
+        makerAddress: string,
+        takerAddress: string,
+        makerFillableAmount: BigNumber,
+        takerFillableAmount: BigNumber,
+        feeRecepient: string,
+        expirationUnixTimestampSec?: BigNumber,
+    ): Promise<SignedOrder> {
         await Promise.all([
             this._increaseBalanceAndAllowanceAsync(makerTokenAddress, makerAddress, makerFillableAmount),
             this._increaseBalanceAndAllowanceAsync(takerTokenAddress, takerAddress, takerFillableAmount),
@@ -107,14 +162,27 @@ export class FillScenarios {
             this._increaseBalanceAndAllowanceAsync(this._zrxTokenAddress, takerAddress, takerFee),
         ]);
 
-        const signedOrder = await orderFactory.createSignedOrderAsync(this._zeroEx,
-            makerAddress, takerAddress, makerFee, takerFee,
-            makerFillableAmount, makerTokenAddress, takerFillableAmount, takerTokenAddress,
-            this._exchangeContractAddress, feeRecepient, expirationUnixTimestampSec);
+        const signedOrder = await orderFactory.createSignedOrderAsync(
+            this._zeroEx,
+            makerAddress,
+            takerAddress,
+            makerFee,
+            takerFee,
+            makerFillableAmount,
+            makerTokenAddress,
+            takerFillableAmount,
+            takerTokenAddress,
+            this._exchangeContractAddress,
+            feeRecepient,
+            expirationUnixTimestampSec,
+        );
         return signedOrder;
     }
     private async _increaseBalanceAndAllowanceAsync(
-        tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
+        tokenAddress: string,
+        address: string,
+        amount: BigNumber,
+    ): Promise<void> {
         if (amount.isZero() || address === ZeroEx.NULL_ADDRESS) {
             return; // noop
         }
@@ -123,16 +191,12 @@ export class FillScenarios {
             this._increaseAllowanceAsync(tokenAddress, address, amount),
         ]);
     }
-    private async _increaseBalanceAsync(
-        tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
+    private async _increaseBalanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
         await this._zeroEx.token.transferAsync(tokenAddress, this._coinbase, address, amount);
     }
-    private async _increaseAllowanceAsync(
-        tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
+    private async _increaseAllowanceAsync(tokenAddress: string, address: string, amount: BigNumber): Promise<void> {
         const oldMakerAllowance = await this._zeroEx.token.getProxyAllowanceAsync(tokenAddress, address);
         const newMakerAllowance = oldMakerAllowance.plus(amount);
-        await this._zeroEx.token.setProxyAllowanceAsync(
-            tokenAddress, address, newMakerAllowance,
-        );
+        await this._zeroEx.token.setProxyAllowanceAsync(tokenAddress, address, newMakerAllowance);
     }
 }
diff --git a/packages/0x.js/test/utils/order_factory.ts b/packages/0x.js/test/utils/order_factory.ts
index 41d93e340..04768af65 100644
--- a/packages/0x.js/test/utils/order_factory.ts
+++ b/packages/0x.js/test/utils/order_factory.ts
@@ -1,7 +1,7 @@
 import BigNumber from 'bignumber.js';
 import * as _ from 'lodash';
 
-import {SignedOrder, ZeroEx} from '../../src';
+import { SignedOrder, ZeroEx } from '../../src';
 
 export const orderFactory = {
     async createSignedOrderAsync(
@@ -16,11 +16,12 @@ export const orderFactory = {
         takerTokenAddress: string,
         exchangeContractAddress: string,
         feeRecipient: string,
-        expirationUnixTimestampSecIfExists?: BigNumber): Promise<SignedOrder> {
+        expirationUnixTimestampSecIfExists?: BigNumber,
+    ): Promise<SignedOrder> {
         const defaultExpirationUnixTimestampSec = new BigNumber(2524604400); // Close to infinite
-        const expirationUnixTimestampSec = _.isUndefined(expirationUnixTimestampSecIfExists) ?
-            defaultExpirationUnixTimestampSec :
-            expirationUnixTimestampSecIfExists;
+        const expirationUnixTimestampSec = _.isUndefined(expirationUnixTimestampSecIfExists)
+            ? defaultExpirationUnixTimestampSec
+            : expirationUnixTimestampSecIfExists;
         const order = {
             maker,
             taker,
@@ -37,7 +38,7 @@ export const orderFactory = {
         };
         const orderHash = ZeroEx.getOrderHashHex(order);
         const ecSignature = await zeroEx.signOrderHashAsync(orderHash, maker);
-        const signedOrder: SignedOrder = _.assign(order, {ecSignature});
+        const signedOrder: SignedOrder = _.assign(order, { ecSignature });
         return signedOrder;
     },
 };
diff --git a/packages/0x.js/test/utils/report_callback_errors.ts b/packages/0x.js/test/utils/report_callback_errors.ts
index 0aaef3f05..8a8f4d966 100644
--- a/packages/0x.js/test/utils/report_callback_errors.ts
+++ b/packages/0x.js/test/utils/report_callback_errors.ts
@@ -1,4 +1,4 @@
-import {DoneCallback} from '../../src/types';
+import { DoneCallback } from '../../src/types';
 
 export const reportCallbackErrors = (done: DoneCallback) => {
     return (f: (...args: any[]) => void) => {
diff --git a/packages/0x.js/test/utils/subproviders/empty_wallet_subprovider.ts b/packages/0x.js/test/utils/subproviders/empty_wallet_subprovider.ts
index e5e279873..53f2be83d 100644
--- a/packages/0x.js/test/utils/subproviders/empty_wallet_subprovider.ts
+++ b/packages/0x.js/test/utils/subproviders/empty_wallet_subprovider.ts
@@ -1,4 +1,4 @@
-import {JSONRPCPayload} from '../../../src/types';
+import { JSONRPCPayload } from '../../../src/types';
 
 /*
  * This class implements the web3-provider-engine subprovider interface and returns
@@ -8,7 +8,7 @@ import {JSONRPCPayload} from '../../../src/types';
 export class EmptyWalletSubprovider {
     // This method needs to be here to satisfy the interface but linter wants it to be static.
     // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error|null, result: any) => void) {
+    public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error | null, result: any) => void) {
         switch (payload.method) {
             case 'eth_accounts':
                 end(null, []);
diff --git a/packages/0x.js/test/utils/subproviders/fake_gas_estimate_subprovider.ts b/packages/0x.js/test/utils/subproviders/fake_gas_estimate_subprovider.ts
index d502ca34e..e1113a851 100644
--- a/packages/0x.js/test/utils/subproviders/fake_gas_estimate_subprovider.ts
+++ b/packages/0x.js/test/utils/subproviders/fake_gas_estimate_subprovider.ts
@@ -1,4 +1,4 @@
-import {JSONRPCPayload} from '../../../src/types';
+import { JSONRPCPayload } from '../../../src/types';
 
 /*
  * This class implements the web3-provider-engine subprovider interface and returns
@@ -15,7 +15,7 @@ export class FakeGasEstimateSubprovider {
     }
     // This method needs to be here to satisfy the interface but linter wants it to be static.
     // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error|null, result: any) => void) {
+    public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error | null, result: any) => void) {
         switch (payload.method) {
             case 'eth_estimateGas':
                 end(null, this._constantGasAmount);
diff --git a/packages/0x.js/test/utils/token_utils.ts b/packages/0x.js/test/utils/token_utils.ts
index 48b5e1798..d3fc22ff4 100644
--- a/packages/0x.js/test/utils/token_utils.ts
+++ b/packages/0x.js/test/utils/token_utils.ts
@@ -1,6 +1,6 @@
 import * as _ from 'lodash';
 
-import {InternalZeroExError, Token} from '../../src/types';
+import { InternalZeroExError, Token } from '../../src/types';
 
 const PROTOCOL_TOKEN_SYMBOL = 'ZRX';
 const WETH_TOKEN_SYMBOL = 'WETH';
@@ -11,14 +11,14 @@ export class TokenUtils {
         this._tokens = tokens;
     }
     public getProtocolTokenOrThrow(): Token {
-        const zrxToken = _.find(this._tokens, {symbol: PROTOCOL_TOKEN_SYMBOL});
+        const zrxToken = _.find(this._tokens, { symbol: PROTOCOL_TOKEN_SYMBOL });
         if (_.isUndefined(zrxToken)) {
             throw new Error(InternalZeroExError.ZrxNotInTokenRegistry);
         }
         return zrxToken;
     }
     public getWethTokenOrThrow(): Token {
-        const wethToken = _.find(this._tokens, {symbol: WETH_TOKEN_SYMBOL});
+        const wethToken = _.find(this._tokens, { symbol: WETH_TOKEN_SYMBOL });
         if (_.isUndefined(wethToken)) {
             throw new Error(InternalZeroExError.WethNotInTokenRegistry);
         }
diff --git a/packages/0x.js/test/utils/web3_factory.ts b/packages/0x.js/test/utils/web3_factory.ts
index 7e65a4381..26c26e03d 100644
--- a/packages/0x.js/test/utils/web3_factory.ts
+++ b/packages/0x.js/test/utils/web3_factory.ts
@@ -6,10 +6,10 @@
 import ProviderEngine = require('web3-provider-engine');
 import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
-import {EmptyWalletSubprovider} from './subproviders/empty_wallet_subprovider';
-import {FakeGasEstimateSubprovider} from './subproviders/fake_gas_estimate_subprovider';
+import { EmptyWalletSubprovider } from './subproviders/empty_wallet_subprovider';
+import { FakeGasEstimateSubprovider } from './subproviders/fake_gas_estimate_subprovider';
 
-import {constants} from './constants';
+import { constants } from './constants';
 
 // HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang
 // because they are using the wrong XHR package.
@@ -31,9 +31,11 @@ export const web3Factory = {
             provider.addProvider(new EmptyWalletSubprovider());
         }
         provider.addProvider(new FakeGasEstimateSubprovider(constants.GAS_ESTIMATE));
-        provider.addProvider(new RpcSubprovider({
-            rpcUrl: constants.RPC_URL,
-        }));
+        provider.addProvider(
+            new RpcSubprovider({
+                rpcUrl: constants.RPC_URL,
+            }),
+        );
         provider.start();
         return provider;
     },