Apply prettier config

22 files changed, 1400 insertions, 704 deletions

diff --git a/packages/0x.js/test/0x.js_test.ts b/packages/0x.js/test/0x.js_test.ts
index 245946a89..8ab20c737 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 +172,11 @@ 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);
         });
     });
@@ -199,15 +205,15 @@ 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),
             ];
 
@@ -217,15 +223,15 @@ 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 +277,9 @@ 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;
     },