diff --git a/.gitignore b/.gitignore
index 4d315dc3a8..7ce8553417 100644
--- a/.gitignore
+++ b/.gitignore
@@ -74,7 +74,8 @@ packages/react-docs/example/public/bundle*
 bin/
 
 # generated contract artifacts
-packages/contracts/src/artifacts
+packages/0x.js/test/artifacts
+packages/migrations/src/artifacts
 
 # generated contract wrappers
 packages/0x.js/src/contract_wrappers/generated/
diff --git a/.prettierignore b/.prettierignore
index 5b8003c950..b3e217fb05 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -1,5 +1,6 @@
 lib
 .nyc_output
 /packages/contracts/src/artifacts
+/packages/metacoin/artifacts
 package.json
 scripts/postpublish_utils.js
diff --git a/README.md b/README.md
index 86e00bfd9b..770f3440da 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ You can include those by prepending @0xproject/typescript-typings package to you
 
 We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
 
-Please read our [contribution guidelines](./CONTRIBUTING.md) before getting started.
+#### Read our [contribution guidelines](./CONTRIBUTING.md).
 
 ### Install dependencies
 
@@ -118,24 +118,6 @@ yarn lerna:run lint
 
 ### Run Tests
 
-Before running the tests, you will need to spin up a [TestRPC](https://www.npmjs.com/package/ethereumjs-testrpc) instance and deploy all the 0x smart contracts.
-
-In a separate terminal, start TestRPC (a convenience command is provided as part of this repo)
-
 ```bash
-yarn testrpc
-```
-
-Then in your main terminal run
-
-```
-cd packages/contracts
-yarn migrate
-cd ..
-```
-
-And finally from the root project directory run
-
-```bash
-yarn lerna:run test
+yarn lerna:test
 ```
diff --git a/package.json b/package.json
index 1336f2d6c9..3f2486656b 100644
--- a/package.json
+++ b/package.json
@@ -13,6 +13,7 @@
         "test:installation": "node ./packages/monorepo-scripts/lib/test_installation.js",
         "lerna:install": "yarn install",
         "lerna:run": "lerna run",
+        "lerna:test": "lerna run test",
         "lerna:clean": "lerna run clean",
         "lerna:build": "lerna run build",
         "lerna:rebuild": "run-s lerna:clean lerna:build",
diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 5f78aae6b6..cd339e7705 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -15,16 +15,16 @@
         "build:watch": "tsc -w",
         "prebuild": "run-s clean generate_contract_wrappers",
         "build": "run-p build:umd:prod build:commonjs; exit 0;",
-        "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'src/artifacts/@(Exchange|Token|TokenTransferProxy|EtherToken|TokenRegistry|DummyToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers && prettier --write 'src/contract_wrappers/generated/**.ts'",
+        "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'src/compact_artifacts/@(Exchange|Token|TokenTransferProxy|EtherToken|TokenRegistry|DummyToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers && prettier --write 'src/contract_wrappers/generated/**.ts'",
         "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
         "test:circleci": "run-s test:coverage",
         "test": "run-s clean test:commonjs",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
-        "update_contracts": "for i in ${npm_package_config_artifacts}; do copyfiles -u 4 ../contracts/build/contracts/$i.json ../0x.js/src/artifacts; done;",
+        "update_artifacts": "for i in ${npm_package_config_contracts}; do copyfiles -u 4 ../migrations/src/artifacts/$i.json test/artifacts; done;",
         "clean": "shx rm -rf _bundles lib test_temp scripts",
         "build:umd:prod": "NODE_ENV=production webpack",
-        "build:commonjs": "tsc && copyfiles -u 2 './src/artifacts/**/*.json' ./lib/src/artifacts && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
+        "build:commonjs": "tsc && yarn update_artifacts && copyfiles -u 2 './src/compact_artifacts/**/*.json' ./lib/src/compact_artifacts && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
         "test:commonjs": "run-s build:commonjs run_mocha",
         "run_mocha": "mocha lib/test/**/*_test.js --timeout 10000 --bail --exit",
         "manual:postpublish": "yarn build; node ./scripts/postpublish.js",
@@ -33,7 +33,8 @@
         "upload_docs_json": "aws s3 cp generated_docs/index.json $S3_URL --profile 0xproject --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers --content-type application/json"
     },
     "config": {
-        "artifacts": "TokenTransferProxy Exchange TokenRegistry Token EtherToken",
+        "compact_artifacts": "Exchange DummyToken ZRXToken Token EtherToken TokenTransferProxy TokenRegistry",
+        "contracts": "Exchange DummyToken ZRXToken Token WETH9 TokenTransferProxy MultiSigWallet MultiSigWalletWithTimeLock MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress MaliciousToken TokenRegistry Arbitrage EtherDelta AccountLevels",
         "postpublish": {
             "assets": [
                 "packages/0x.js/_bundles/index.js",
@@ -60,8 +61,10 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
+        "@0xproject/deployer": "^0.4.0",
         "@0xproject/dev-utils": "^0.3.5",
         "@0xproject/monorepo-scripts": "^0.1.17",
+        "@0xproject/subproviders": "^0.8.4",
         "@0xproject/tslint-config": "^0.4.15",
         "@types/bintrees": "^1.0.2",
         "@types/lodash": "4.14.104",
@@ -90,6 +93,7 @@
         "tslint": "5.8.0",
         "typedoc": "0xProject/typedoc",
         "typescript": "2.7.1",
+        "web3-provider-engine": "^13.0.1",
         "webpack": "^3.1.0"
     },
     "dependencies": {
@@ -111,6 +115,9 @@
         "uuid": "^3.1.0",
         "web3": "^0.20.0"
     },
+    "optionalDependencies": {
+        "@0xproject/migrations": "^0.0.1"
+    },
     "publishConfig": {
         "access": "public"
     }
diff --git a/packages/0x.js/src/artifacts.ts b/packages/0x.js/src/artifacts.ts
index cbacd7d568..a91d9ae1f1 100644
--- a/packages/0x.js/src/artifacts.ts
+++ b/packages/0x.js/src/artifacts.ts
@@ -1,10 +1,10 @@
-import * as DummyTokenArtifact from './artifacts/DummyToken.json';
-import * as EtherTokenArtifact from './artifacts/EtherToken.json';
-import * as ExchangeArtifact from './artifacts/Exchange.json';
-import * as TokenArtifact from './artifacts/Token.json';
-import * as TokenRegistryArtifact from './artifacts/TokenRegistry.json';
-import * as TokenTransferProxyArtifact from './artifacts/TokenTransferProxy.json';
-import * as ZRXArtifact from './artifacts/ZRX.json';
+import * as DummyTokenArtifact from './compact_artifacts/DummyToken.json';
+import * as EtherTokenArtifact from './compact_artifacts/EtherToken.json';
+import * as ExchangeArtifact from './compact_artifacts/Exchange.json';
+import * as TokenArtifact from './compact_artifacts/Token.json';
+import * as TokenRegistryArtifact from './compact_artifacts/TokenRegistry.json';
+import * as TokenTransferProxyArtifact from './compact_artifacts/TokenTransferProxy.json';
+import * as ZRXArtifact from './compact_artifacts/ZRX.json';
 import { Artifact } from './types';
 
 export const artifacts = {
diff --git a/packages/0x.js/src/artifacts/DummyToken.json b/packages/0x.js/src/compact_artifacts/DummyToken.json
similarity index 100%
rename from packages/0x.js/src/artifacts/DummyToken.json
rename to packages/0x.js/src/compact_artifacts/DummyToken.json
diff --git a/packages/0x.js/src/artifacts/EtherToken.json b/packages/0x.js/src/compact_artifacts/EtherToken.json
similarity index 100%
rename from packages/0x.js/src/artifacts/EtherToken.json
rename to packages/0x.js/src/compact_artifacts/EtherToken.json
diff --git a/packages/0x.js/src/artifacts/Exchange.json b/packages/0x.js/src/compact_artifacts/Exchange.json
similarity index 100%
rename from packages/0x.js/src/artifacts/Exchange.json
rename to packages/0x.js/src/compact_artifacts/Exchange.json
diff --git a/packages/0x.js/src/artifacts/Token.json b/packages/0x.js/src/compact_artifacts/Token.json
similarity index 100%
rename from packages/0x.js/src/artifacts/Token.json
rename to packages/0x.js/src/compact_artifacts/Token.json
diff --git a/packages/0x.js/src/artifacts/TokenRegistry.json b/packages/0x.js/src/compact_artifacts/TokenRegistry.json
similarity index 100%
rename from packages/0x.js/src/artifacts/TokenRegistry.json
rename to packages/0x.js/src/compact_artifacts/TokenRegistry.json
diff --git a/packages/0x.js/src/artifacts/TokenTransferProxy.json b/packages/0x.js/src/compact_artifacts/TokenTransferProxy.json
similarity index 100%
rename from packages/0x.js/src/artifacts/TokenTransferProxy.json
rename to packages/0x.js/src/compact_artifacts/TokenTransferProxy.json
diff --git a/packages/0x.js/src/artifacts/ZRX.json b/packages/0x.js/src/compact_artifacts/ZRX.json
similarity index 100%
rename from packages/0x.js/src/artifacts/ZRX.json
rename to packages/0x.js/src/compact_artifacts/ZRX.json
diff --git a/packages/0x.js/test/0x.js_test.ts b/packages/0x.js/test/0x.js_test.ts
index 70e85aa528..de5a6be589 100644
--- a/packages/0x.js/test/0x.js_test.ts
+++ b/packages/0x.js/test/0x.js_test.ts
@@ -1,16 +1,23 @@
+import { Deployer } from '@0xproject/deployer';
 import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
+// HACK: This dependency is optional since it is only available when run from within
+// the monorepo. tslint doesn't handle optional dependencies
+// tslint:disable-next-line:no-implicit-dependencies
+import { runMigrationsAsync } from '@0xproject/migrations';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
+import * as path from 'path';
 import * as Sinon from 'sinon';
 
 import { ApprovalContractEventArgs, LogWithDecodedArgs, Order, TokenEvents, ZeroEx } from '../src';
 
 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
+import { deployer } from './utils/deployer';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
 chaiSetup.configure();
@@ -19,10 +26,14 @@ const expect = chai.expect;
 const SHOULD_ADD_PERSONAL_MESSAGE_PREFIX = false;
 
 describe('ZeroEx library', () => {
-    const config = {
-        networkId: constants.TESTRPC_NETWORK_ID,
-    };
-    const zeroEx = new ZeroEx(web3.currentProvider, config);
+    let zeroEx: ZeroEx;
+    before(async () => {
+        await runMigrationsAsync(deployer);
+        const config = {
+            networkId: constants.TESTRPC_NETWORK_ID,
+        };
+        zeroEx = new ZeroEx(provider, config);
+    });
     describe('#setProvider', () => {
         it('overrides provider in nested web3s and invalidates contractInstances', async () => {
             // Instantiate the contract instances with the current provider
@@ -31,10 +42,9 @@ describe('ZeroEx library', () => {
             expect((zeroEx.exchange as any)._exchangeContractIfExists).to.not.be.undefined();
             expect((zeroEx.tokenRegistry as any)._tokenRegistryContractIfExists).to.not.be.undefined();
 
-            const newProvider = web3Factory.getRpcProvider();
             // Add property to newProvider so that we can differentiate it from old provider
-            (newProvider as any).zeroExTestId = 1;
-            zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
+            (provider as any).zeroExTestId = 1;
+            zeroEx.setProvider(provider, constants.TESTRPC_NETWORK_ID);
 
             // Check that contractInstances with old provider are removed after provider update
             expect((zeroEx.exchange as any)._exchangeContractIfExists).to.be.undefined();
@@ -278,7 +288,7 @@ describe('ZeroEx library', () => {
                 exchangeContractAddress: ZeroEx.NULL_ADDRESS,
                 networkId: constants.TESTRPC_NETWORK_ID,
             };
-            const zeroExWithWrongExchangeAddress = new ZeroEx(web3.currentProvider, zeroExConfig);
+            const zeroExWithWrongExchangeAddress = new ZeroEx(provider, zeroExConfig);
             expect(zeroExWithWrongExchangeAddress.exchange.getContractAddress()).to.be.equal(ZeroEx.NULL_ADDRESS);
         });
         it('allows to specify token registry token contract address', async () => {
@@ -286,7 +296,7 @@ describe('ZeroEx library', () => {
                 tokenRegistryContractAddress: ZeroEx.NULL_ADDRESS,
                 networkId: constants.TESTRPC_NETWORK_ID,
             };
-            const zeroExWithWrongTokenRegistryAddress = new ZeroEx(web3.currentProvider, zeroExConfig);
+            const zeroExWithWrongTokenRegistryAddress = new ZeroEx(provider, zeroExConfig);
             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 e8ab9aa97d..17f068a2e2 100644
--- a/packages/0x.js/test/artifacts_test.ts
+++ b/packages/0x.js/test/artifacts_test.ts
@@ -17,11 +17,11 @@ describe('Artifacts', () => {
         const packageJSONContent = fs.readFileSync('package.json', 'utf-8');
         const packageJSON = JSON.parse(packageJSONContent);
         const mnemonic = packageJSON.config.mnemonic;
-        const web3Provider = new HDWalletProvider(mnemonic, kovanRpcUrl);
+        const provider = new HDWalletProvider(mnemonic, kovanRpcUrl);
         const config = {
             networkId: constants.KOVAN_NETWORK_ID,
         };
-        const zeroEx = new ZeroEx(web3Provider, config);
+        const zeroEx = new ZeroEx(provider, config);
         it('token registry contract is deployed', async () => {
             await (zeroEx.tokenRegistry as any)._getTokenRegistryContractAsync();
         }).timeout(TIMEOUT);
@@ -37,11 +37,11 @@ describe('Artifacts', () => {
         const packageJSONContent = fs.readFileSync('package.json', 'utf-8');
         const packageJSON = JSON.parse(packageJSONContent);
         const mnemonic = packageJSON.config.mnemonic;
-        const web3Provider = new HDWalletProvider(mnemonic, ropstenRpcUrl);
+        const provider = new HDWalletProvider(mnemonic, ropstenRpcUrl);
         const config = {
             networkId: constants.ROPSTEN_NETWORK_ID,
         };
-        const zeroEx = new ZeroEx(web3Provider, config);
+        const zeroEx = new ZeroEx(provider, config);
         it('token registry contract is deployed', async () => {
             await (zeroEx.tokenRegistry as any)._getTokenRegistryContractAsync();
         }).timeout(TIMEOUT);
diff --git a/packages/0x.js/test/assert_test.ts b/packages/0x.js/test/assert_test.ts
index c4451742f5..b08f3e23be 100644
--- a/packages/0x.js/test/assert_test.ts
+++ b/packages/0x.js/test/assert_test.ts
@@ -6,15 +6,15 @@ import { ZeroEx } from '../src';
 import { assert } from '../src/utils/assert';
 
 import { constants } from './utils/constants';
+import { provider } from './utils/web3_wrapper';
 
 const expect = chai.expect;
 
 describe('Assertion library', () => {
-    const web3 = web3Factory.create();
     const config = {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
-    const zeroEx = new ZeroEx(web3.currentProvider, config);
+    const zeroEx = new ZeroEx(provider, config);
     describe('#isSenderAddressHexAsync', () => {
         it('throws when address is invalid', async () => {
             const address = '0xdeadbeef';
diff --git a/packages/0x.js/test/ether_token_wrapper_test.ts b/packages/0x.js/test/ether_token_wrapper_test.ts
index 644101dc71..99c42fe0b7 100644
--- a/packages/0x.js/test/ether_token_wrapper_test.ts
+++ b/packages/0x.js/test/ether_token_wrapper_test.ts
@@ -3,7 +3,6 @@ import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
 import 'mocha';
-import * as Web3 from 'web3';
 
 import {
     ApprovalContractEventArgs,
@@ -24,7 +23,7 @@ import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
 import { reportNodeCallbackErrors } from './utils/report_callback_errors';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -55,7 +54,7 @@ describe('EtherTokenWrapper', () => {
     const depositAmount = new BigNumber(42);
     const withdrawalAmount = new BigNumber(42);
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, zeroExConfig);
+        zeroEx = new ZeroEx(provider, zeroExConfig);
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         addressWithETH = userAddresses[0];
@@ -79,7 +78,7 @@ describe('EtherTokenWrapper', () => {
             const UNKNOWN_NETWORK_NETWORK_ID = 10;
             expect(
                 () =>
-                    new ZeroEx(web3.currentProvider, {
+                    new ZeroEx(provider, {
                         networkId: UNKNOWN_NETWORK_NETWORK_ID,
                     } as any),
             ).to.throw();
@@ -261,8 +260,7 @@ describe('EtherTokenWrapper', () => {
                     callbackNeverToBeCalled,
                 );
                 const callbackToBeCalled = reportNodeCallbackErrors(done)();
-                const newProvider = web3Factory.getRpcProvider();
-                zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
+                zeroEx.setProvider(provider, constants.TESTRPC_NETWORK_ID);
                 await zeroEx.etherToken.depositAsync(etherTokenAddress, transferAmount, addressWithETH);
                 zeroEx.etherToken.subscribe(
                     etherTokenAddress,
diff --git a/packages/0x.js/test/event_watcher_test.ts b/packages/0x.js/test/event_watcher_test.ts
index 2fa6c05807..40ffcc2f67 100644
--- a/packages/0x.js/test/event_watcher_test.ts
+++ b/packages/0x.js/test/event_watcher_test.ts
@@ -5,7 +5,6 @@ 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';
@@ -13,12 +12,12 @@ import { DoneCallback } from '../src/types';
 
 import { chaiSetup } from './utils/chai_setup';
 import { reportNodeCallbackErrors } from './utils/report_callback_errors';
+import { provider } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
 
 describe('EventWatcher', () => {
-    let web3: Web3;
     let stubs: Sinon.SinonStub[] = [];
     let eventWatcher: EventWatcher;
     let web3Wrapper: Web3Wrapper;
@@ -53,9 +52,8 @@ describe('EventWatcher', () => {
         transactionIndex: 0,
     };
     before(async () => {
-        web3 = web3Factory.create();
         const pollingIntervalMs = 10;
-        web3Wrapper = new Web3Wrapper(web3.currentProvider);
+        web3Wrapper = new Web3Wrapper(provider);
         eventWatcher = new EventWatcher(web3Wrapper, pollingIntervalMs);
     });
     afterEach(() => {
diff --git a/packages/0x.js/test/exchange_transfer_simulator_test.ts b/packages/0x.js/test/exchange_transfer_simulator_test.ts
index 4447a61cbc..cb976a0ae3 100644
--- a/packages/0x.js/test/exchange_transfer_simulator_test.ts
+++ b/packages/0x.js/test/exchange_transfer_simulator_test.ts
@@ -9,7 +9,7 @@ import { ExchangeTransferSimulator } from '../src/utils/exchange_transfer_simula
 
 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -19,7 +19,7 @@ describe('ExchangeTransferSimulator', () => {
     const config = {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
-    const zeroEx = new ZeroEx(web3.currentProvider, config);
+    const zeroEx = new ZeroEx(provider, config);
     const transferAmount = new BigNumber(5);
     let userAddresses: string[];
     let tokens: Token[];
diff --git a/packages/0x.js/test/exchange_wrapper_test.ts b/packages/0x.js/test/exchange_wrapper_test.ts
index cfc390bae8..cd74af5a1c 100644
--- a/packages/0x.js/test/exchange_wrapper_test.ts
+++ b/packages/0x.js/test/exchange_wrapper_test.ts
@@ -4,7 +4,6 @@ import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
-import * as Web3 from 'web3';
 
 import {
     BlockRange,
@@ -26,7 +25,7 @@ import { constants } from './utils/constants';
 import { FillScenarios } from './utils/fill_scenarios';
 import { reportNodeCallbackErrors } from './utils/report_callback_errors';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -46,7 +45,7 @@ describe('ExchangeWrapper', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         exchangeContractAddress = zeroEx.exchange.getContractAddress();
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
@@ -977,8 +976,7 @@ describe('ExchangeWrapper', () => {
                 );
                 zeroEx.exchange.subscribe(ExchangeEvents.LogFill, indexFilterValues, callbackNeverToBeCalled);
 
-                const newProvider = web3Factory.getRpcProvider();
-                zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
+                zeroEx.setProvider(provider, constants.TESTRPC_NETWORK_ID);
 
                 const callback = reportNodeCallbackErrors(done)(
                     (logEvent: DecodedLogEvent<LogFillContractEventArgs>) => {
diff --git a/packages/0x.js/test/expiration_watcher_test.ts b/packages/0x.js/test/expiration_watcher_test.ts
index ed7a6e5e3e..29b111fa31 100644
--- a/packages/0x.js/test/expiration_watcher_test.ts
+++ b/packages/0x.js/test/expiration_watcher_test.ts
@@ -4,7 +4,6 @@ import * as chai from 'chai';
 import * as _ from 'lodash';
 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';
@@ -16,7 +15,7 @@ import { constants } from './utils/constants';
 import { FillScenarios } from './utils/fill_scenarios';
 import { reportNoErrorCallbackErrors } from './utils/report_callback_errors';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -44,7 +43,7 @@ describe('ExpirationWatcher', () => {
         const config = {
             networkId: constants.TESTRPC_NETWORK_ID,
         };
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         exchangeContractAddress = zeroEx.exchange.getContractAddress();
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
diff --git a/packages/0x.js/test/order_state_watcher_test.ts b/packages/0x.js/test/order_state_watcher_test.ts
index 4210e013f8..45a292c8b1 100644
--- a/packages/0x.js/test/order_state_watcher_test.ts
+++ b/packages/0x.js/test/order_state_watcher_test.ts
@@ -3,7 +3,6 @@ import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 import 'mocha';
-import * as Web3 from 'web3';
 
 import {
     ExchangeContractErrs,
@@ -23,7 +22,7 @@ import { constants } from './utils/constants';
 import { FillScenarios } from './utils/fill_scenarios';
 import { reportNodeCallbackErrors } from './utils/report_callback_errors';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 const TIMEOUT_MS = 150;
 
@@ -51,7 +50,7 @@ describe('OrderStateWatcher', () => {
     const decimals = constants.ZRX_DECIMALS;
     const fillableAmount = ZeroEx.toBaseUnitAmount(new BigNumber(5), decimals);
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         orderStateWatcher = zeroEx.createOrderStateWatcher();
         exchangeContractAddress = zeroEx.exchange.getContractAddress();
         userAddresses = await zeroEx.getAvailableAddressesAsync();
diff --git a/packages/0x.js/test/order_validation_test.ts b/packages/0x.js/test/order_validation_test.ts
index 5472ca8f64..c894774b88 100644
--- a/packages/0x.js/test/order_validation_test.ts
+++ b/packages/0x.js/test/order_validation_test.ts
@@ -3,7 +3,6 @@ import { BlockParamLiteral } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as Sinon from 'sinon';
-import * as Web3 from 'web3';
 
 import { ExchangeContractErrs, SignedOrder, Token, ZeroEx, ZeroExError } from '../src';
 import { TradeSide, TransferType } from '../src/types';
@@ -14,7 +13,7 @@ import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
 import { FillScenarios } from './utils/fill_scenarios';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -40,7 +39,7 @@ describe('OrderValidation', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         exchangeContractAddress = zeroEx.exchange.getContractAddress();
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         [coinbase, makerAddress, takerAddress, feeRecipient] = userAddresses;
diff --git a/packages/0x.js/test/subscription_test.ts b/packages/0x.js/test/subscription_test.ts
index 9b4751287c..ed4f838c07 100644
--- a/packages/0x.js/test/subscription_test.ts
+++ b/packages/0x.js/test/subscription_test.ts
@@ -3,7 +3,6 @@ import { BigNumber } from '@0xproject/utils';
 import * as _ from 'lodash';
 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';
@@ -11,7 +10,7 @@ import { DoneCallback } from '../src/types';
 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
 import { assertNodeCallbackError } from './utils/report_callback_errors';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
@@ -26,7 +25,7 @@ describe('SubscriptionTest', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
         coinbase = userAddresses[0];
diff --git a/packages/0x.js/test/token_registry_wrapper_test.ts b/packages/0x.js/test/token_registry_wrapper_test.ts
index 3b7ce46fbf..19caa2ed42 100644
--- a/packages/0x.js/test/token_registry_wrapper_test.ts
+++ b/packages/0x.js/test/token_registry_wrapper_test.ts
@@ -8,7 +8,7 @@ import { Token, ZeroEx } from '../src';
 
 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -31,7 +31,7 @@ describe('TokenRegistryWrapper', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
         _.map(tokens, token => {
             tokenAddressBySymbol[token.symbol] = token.address;
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 fb003634a2..9415d7c08c 100644
--- a/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts
+++ b/packages/0x.js/test/token_transfer_proxy_wrapper_test.ts
@@ -1,14 +1,13 @@
-import { web3Factory } from '@0xproject/dev-utils';
 import * as chai from 'chai';
 
 import { ZeroEx } from '../src';
 
 import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
+import { provider } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
-const web3 = web3Factory.create();
 
 describe('TokenTransferProxyWrapper', () => {
     let zeroEx: ZeroEx;
@@ -16,7 +15,7 @@ describe('TokenTransferProxyWrapper', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
     });
     describe('#isAuthorizedAsync', () => {
         it('should return false if the address is not authorized', async () => {
diff --git a/packages/0x.js/test/token_wrapper_test.ts b/packages/0x.js/test/token_wrapper_test.ts
index 0c6335d5ea..04fd943aa2 100644
--- a/packages/0x.js/test/token_wrapper_test.ts
+++ b/packages/0x.js/test/token_wrapper_test.ts
@@ -1,9 +1,10 @@
-import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
+import { BlockchainLifecycle, devConstants } from '@0xproject/dev-utils';
+import { EmptyWalletSubprovider } from '@0xproject/subproviders';
+import { Provider } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
-import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
 import 'mocha';
-import * as Web3 from 'web3';
+import Web3ProviderEngine = require('web3-provider-engine');
 
 import {
     ApprovalContractEventArgs,
@@ -22,7 +23,7 @@ import { chaiSetup } from './utils/chai_setup';
 import { constants } from './utils/constants';
 import { reportNodeCallbackErrors } from './utils/report_callback_errors';
 import { TokenUtils } from './utils/token_utils';
-import { web3, web3Wrapper } from './utils/web3_wrapper';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
 
 chaiSetup.configure();
 const expect = chai.expect;
@@ -39,7 +40,7 @@ describe('TokenWrapper', () => {
         networkId: constants.TESTRPC_NETWORK_ID,
     };
     before(async () => {
-        zeroEx = new ZeroEx(web3.currentProvider, config);
+        zeroEx = new ZeroEx(provider, config);
         userAddresses = await zeroEx.getAvailableAddressesAsync();
         tokens = await zeroEx.tokenRegistry.getTokensAsync();
         tokenUtils = new TokenUtils(tokens);
@@ -164,7 +165,7 @@ describe('TokenWrapper', () => {
         });
     });
     describe('#getBalanceAsync', () => {
-        describe('With web3 provider with accounts', () => {
+        describe('With provider with accounts', () => {
             it('should return the balance for an existing ERC20 token', async () => {
                 const token = tokens[0];
                 const ownerAddress = coinbase;
@@ -187,14 +188,14 @@ describe('TokenWrapper', () => {
                 return expect(balance).to.be.bignumber.equal(expectedBalance);
             });
         });
-        describe('With web3 provider without accounts', () => {
+        describe('With provider without accounts', () => {
             let zeroExWithoutAccounts: ZeroEx;
             before(async () => {
                 const hasAddresses = false;
-                const web3WithoutAccounts = web3Factory.create({ hasAddresses });
-                zeroExWithoutAccounts = new ZeroEx(web3WithoutAccounts.currentProvider, config);
+                const emptyWalletProvider = addEmptyWalletSubprovider(provider);
+                zeroExWithoutAccounts = new ZeroEx(emptyWalletProvider, config);
             });
-            it('should return balance even when called with Web3 provider instance without addresses', async () => {
+            it('should return balance even when called with provider instance without addresses', async () => {
                 const token = tokens[0];
                 const ownerAddress = coinbase;
                 const balance = await zeroExWithoutAccounts.token.getBalanceAsync(token.address, ownerAddress);
@@ -277,7 +278,7 @@ describe('TokenWrapper', () => {
         });
     });
     describe('#getAllowanceAsync', () => {
-        describe('With web3 provider with accounts', () => {
+        describe('With provider with accounts', () => {
             it('should get the proxy allowance', async () => {
                 const token = tokens[0];
                 const ownerAddress = coinbase;
@@ -299,12 +300,12 @@ describe('TokenWrapper', () => {
                 return expect(allowance).to.be.bignumber.equal(expectedAllowance);
             });
         });
-        describe('With web3 provider without accounts', () => {
+        describe('With provider without accounts', () => {
             let zeroExWithoutAccounts: ZeroEx;
             before(async () => {
                 const hasAddresses = false;
-                const web3WithoutAccounts = web3Factory.create({ hasAddresses });
-                zeroExWithoutAccounts = new ZeroEx(web3WithoutAccounts.currentProvider, config);
+                const emptyWalletProvider = addEmptyWalletSubprovider(provider);
+                zeroExWithoutAccounts = new ZeroEx(emptyWalletProvider, config);
             });
             it('should get the proxy allowance', async () => {
                 const token = tokens[0];
@@ -424,8 +425,7 @@ describe('TokenWrapper', () => {
                 );
                 zeroEx.token.subscribe(tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackNeverToBeCalled);
                 const callbackToBeCalled = reportNodeCallbackErrors(done)();
-                const newProvider = web3Factory.getRpcProvider();
-                zeroEx.setProvider(newProvider, constants.TESTRPC_NETWORK_ID);
+                zeroEx.setProvider(provider, constants.TESTRPC_NETWORK_ID);
                 zeroEx.token.subscribe(tokenAddress, TokenEvents.Transfer, indexFilterValues, callbackToBeCalled);
                 await zeroEx.token.transferAsync(tokenAddress, coinbase, addressWithoutFunds, transferAmount);
             })().catch(done);
@@ -515,3 +515,14 @@ describe('TokenWrapper', () => {
     });
 });
 // tslint:disable:max-file-line-count
+
+function addEmptyWalletSubprovider(p: Provider): Provider {
+    const providerEngine = new Web3ProviderEngine();
+    providerEngine.addProvider(new EmptyWalletSubprovider());
+    const currentSubproviders = (p as any)._providers;
+    for (const subprovider of currentSubproviders) {
+        providerEngine.addProvider(subprovider);
+    }
+    providerEngine.start();
+    return providerEngine;
+}
diff --git a/packages/contracts/migrations/index.ts b/packages/0x.js/test/utils/deployer.ts
similarity index 57%
rename from packages/contracts/migrations/index.ts
rename to packages/0x.js/test/utils/deployer.ts
index 47ae7044d1..b092322e24 100644
--- a/packages/contracts/migrations/index.ts
+++ b/packages/0x.js/test/utils/deployer.ts
@@ -2,19 +2,17 @@ import { Deployer } from '@0xproject/deployer';
 import { devConstants } from '@0xproject/dev-utils';
 import * as path from 'path';
 
-import { constants } from '../util/constants';
+import { constants } from './constants';
 
-import { runMigrationsAsync } from './migrate';
+import { provider } from './web3_wrapper';
 
+const artifactsDir = path.resolve('test', 'artifacts');
 const deployerOpts = {
-    artifactsDir: path.resolve('src', 'artifacts'),
-    jsonrpcUrl: devConstants.RPC_URL,
+    artifactsDir,
+    provider,
     networkId: constants.TESTRPC_NETWORK_ID,
     defaults: {
         gas: devConstants.GAS_ESTIMATE,
     },
 };
-
 export const deployer = new Deployer(deployerOpts);
-
-runMigrationsAsync(deployer).catch(console.log);
diff --git a/packages/0x.js/test/utils/web3_wrapper.ts b/packages/0x.js/test/utils/web3_wrapper.ts
index 4b374fc7ef..b7b3f0b7fe 100644
--- a/packages/0x.js/test/utils/web3_wrapper.ts
+++ b/packages/0x.js/test/utils/web3_wrapper.ts
@@ -1,6 +1,12 @@
-import { web3Factory } from '@0xproject/dev-utils';
+import { devConstants, web3Factory } from '@0xproject/dev-utils';
+import { Provider } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as Web3 from 'web3';
 
-export const web3 = web3Factory.create();
-export const web3Wrapper = new Web3Wrapper(web3.currentProvider);
+import { constants } from './constants';
+
+const web3 = web3Factory.create({ shouldUseInProcessGanache: true });
+const provider: Provider = web3.currentProvider;
+const web3Wrapper = new Web3Wrapper(web3.currentProvider);
+
+export { provider, web3Wrapper };
diff --git a/packages/assert/package.json b/packages/assert/package.json
index 32cb8cb4d5..8ed287c252 100644
--- a/packages/assert/package.json
+++ b/packages/assert/package.json
@@ -9,7 +9,7 @@
         "build": "tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
         "clean": "shx rm -rf lib test_temp scripts",
         "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "run_mocha": "mocha lib/test/**/*_test.js --exit",
         "prepublishOnly": "run-p build",
         "test": "run-s clean build run_mocha",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
diff --git a/packages/connect/package.json b/packages/connect/package.json
index 32800c3536..8fe29a1adf 100644
--- a/packages/connect/package.json
+++ b/packages/connect/package.json
@@ -17,7 +17,7 @@
         "clean": "shx rm -rf lib test_temp scripts",
         "copy_test_fixtures": "copyfiles -u 2 './test/fixtures/**/*.json' ./lib/test/fixtures",
         "lint": "tslint --project . 'src/**/*.ts' 'test/**/*.ts'",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "run_mocha": "mocha lib/test/**/*_test.js --exit",
         "test": "run-s clean build copy_test_fixtures run_mocha",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
diff --git a/packages/contracts/README.md b/packages/contracts/README.md
index 286ef019cf..16e2535493 100644
--- a/packages/contracts/README.md
+++ b/packages/contracts/README.md
@@ -72,17 +72,6 @@ yarn lint
 
 ### Run Tests
 
-Before running the tests, you will need to spin up a [TestRPC](https://www.npmjs.com/package/ethereumjs-testrpc) instance.
-
-In a separate terminal, start TestRPC (a convenience command is provided as part of the [0x.js monorepo](https://github.com/0xProject/0x-monorepo))
-
-```bash
-cd ../..
-yarn testrpc
-```
-
-Then in your main terminal run
-
 ```bash
 yarn test
 ```
diff --git a/packages/contracts/migrations/config/multisig_sample.ts b/packages/contracts/migrations/config/multisig_sample.ts
deleted file mode 100644
index bc2502fca3..0000000000
--- a/packages/contracts/migrations/config/multisig_sample.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import { MultiSigConfigByNetwork } from '../types';
-
-// Make a copy of this file named `multisig.js` and input custom params as needed
-export const multiSig: MultiSigConfigByNetwork = {
-    kovan: {
-        owners: [],
-        confirmationsRequired: 0,
-        secondsRequired: 0,
-    },
-};
diff --git a/packages/contracts/migrations/types.ts b/packages/contracts/migrations/types.ts
deleted file mode 100644
index 58d1e5b4f1..0000000000
--- a/packages/contracts/migrations/types.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-export interface MultiSigConfig {
-    owners: string[];
-    confirmationsRequired: number;
-    secondsRequired: number;
-}
-
-export interface MultiSigConfigByNetwork {
-    [networkName: string]: MultiSigConfig;
-}
-
-export interface Token {
-    address?: string;
-    name: string;
-    symbol: string;
-    decimals: number;
-    ipfsHash: string;
-    swarmHash: string;
-}
-
-export interface TokenInfoByNetwork {
-    development: Token[];
-    live: Token[];
-}
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index 752a947df5..ad338bd5f0 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -10,16 +10,15 @@
     "scripts": {
         "build:watch": "tsc -w",
         "prebuild": "run-s clean compile copy_artifacts generate_contract_wrappers",
-        "copy_artifacts": "copyfiles './src/artifacts/**/*' ./lib",
+        "copy_artifacts": "copyfiles -u 4 '../migrations/src/artifacts/**/*' ./lib/src/artifacts;",
         "build": "tsc",
         "test": "run-s build run_mocha",
         "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
         "run_mocha": "mocha 'lib/test/**/*.js' --timeout 100000 --bail --exit",
         "compile:comment": "Yarn workspaces do not link binaries correctly so we need to reference them directly https://github.com/yarnpkg/yarn/issues/3846",
-        "compile": "node ../deployer/lib/src/cli.js compile --contracts ${npm_package_config_contracts} --contract-dirs src/contracts --artifacts-dir src/artifacts",
+        "compile": "node ../deployer/lib/src/cli.js compile --contracts ${npm_package_config_contracts} --contract-dirs src/contracts --artifacts-dir ../migrations/src/artifacts",
         "clean": "shx rm -rf ./lib",
         "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis  ${npm_package_config_abis} --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers && prettier --write 'src/contract_wrappers/generated/**.ts'",
-        "migrate": "yarn build && yarn compile && node ./lib/migrations/index.js",
         "lint": "tslint --project . 'migrations/**/*.ts' 'test/**/*.ts' 'util/**/*.ts' 'deploy/**/*.ts'",
         "coverage:report:text": "istanbul report text",
         "coverage:report:html": "istanbul report html && open coverage/index.html",
@@ -27,7 +26,7 @@
         "test:circleci": "yarn test:coverage"
     },
     "config": {
-        "abis": "src/artifacts/@(DummyToken|TokenTransferProxy|Exchange|TokenRegistry|MultiSigWallet|MultiSigWalletWithTimeLock|MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress|TokenRegistry|ZRXToken|Arbitrage|EtherDelta|AccountLevels).json",
+        "abis": "../migrations/src/artifacts/@(DummyToken|TokenTransferProxy|Exchange|TokenRegistry|MultiSigWallet|MultiSigWalletWithTimeLock|MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress|TokenRegistry|ZRXToken|Arbitrage|EtherDelta|AccountLevels).json",
         "contracts": "Exchange,DummyToken,ZRXToken,Token,WETH9,TokenTransferProxy,MultiSigWallet,MultiSigWalletWithTimeLock,MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress,MaliciousToken,TokenRegistry,Arbitrage,EtherDelta,AccountLevels"
     },
     "repository": {
diff --git a/packages/contracts/test/multi_sig_with_time_lock.ts b/packages/contracts/test/multi_sig_with_time_lock.ts
index ea74d4c7fa..b7604457fe 100644
--- a/packages/contracts/test/multi_sig_with_time_lock.ts
+++ b/packages/contracts/test/multi_sig_with_time_lock.ts
@@ -46,7 +46,7 @@ describe('MultiSigWalletWithTimeLock', () => {
 
     describe('changeTimeLock', () => {
         describe('initially non-time-locked', async () => {
-            before('deploy a walet', async () => {
+            before('deploy a wallet', async () => {
                 const multiSigInstance = await deployer.deployAsync(ContractName.MultiSigWalletWithTimeLock, [
                     owners,
                     SIGNATURES_REQUIRED,
@@ -143,7 +143,7 @@ describe('MultiSigWalletWithTimeLock', () => {
             });
         });
         describe('initially time-locked', async () => {
-            before('deploy a walet', async () => {
+            before('deploy a wallet', async () => {
                 const multiSigInstance = await deployer.deployAsync(ContractName.MultiSigWalletWithTimeLock, [
                     owners,
                     SIGNATURES_REQUIRED,
diff --git a/packages/contracts/test/token_registry.ts b/packages/contracts/test/token_registry.ts
index 12fc52dbc0..4c404176b4 100644
--- a/packages/contracts/test/token_registry.ts
+++ b/packages/contracts/test/token_registry.ts
@@ -1,6 +1,6 @@
 import { ZeroEx } from '0x.js';
 import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
-import { BigNumber } from '@0xproject/utils';
+import { BigNumber, NULL_BYTES } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
 import ethUtil = require('ethereumjs-util');
@@ -66,8 +66,8 @@ describe('TokenRegistry', () => {
         name: '',
         symbol: '',
         decimals: 0,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     };
 
     describe('addToken', () => {
diff --git a/packages/contracts/test/utils/deployer.ts b/packages/contracts/test/utils/deployer.ts
index 45f79a2a45..2f0951475a 100644
--- a/packages/contracts/test/utils/deployer.ts
+++ b/packages/contracts/test/utils/deployer.ts
@@ -8,7 +8,7 @@ import { web3 } from './web3_wrapper';
 
 const deployerOpts = {
     provider: web3.currentProvider,
-    artifactsDir: path.resolve('src', 'artifacts'),
+    artifactsDir: path.resolve('lib', 'src', 'artifacts'),
     networkId: constants.TESTRPC_NETWORK_ID,
     defaults: {
         gas: devConstants.GAS_ESTIMATE,
diff --git a/packages/contracts/test/utils/web3_wrapper.ts b/packages/contracts/test/utils/web3_wrapper.ts
index 1a711dad23..dd6f198c4b 100644
--- a/packages/contracts/test/utils/web3_wrapper.ts
+++ b/packages/contracts/test/utils/web3_wrapper.ts
@@ -1,7 +1,8 @@
 import { web3Factory } from '@0xproject/dev-utils';
+import { Provider } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 
-const web3ProviderConfig = { shouldUseInProcessGanache: true };
-export const web3 = web3Factory.create(web3ProviderConfig);
+const providerConfigs = { shouldUseInProcessGanache: true };
+export const web3 = web3Factory.create(providerConfigs);
 export const provider = web3.currentProvider;
 export const web3Wrapper = new Web3Wrapper(provider);
diff --git a/packages/contracts/util/constants.ts b/packages/contracts/util/constants.ts
index 9bb090a2a5..d1152e683c 100644
--- a/packages/contracts/util/constants.ts
+++ b/packages/contracts/util/constants.ts
@@ -4,7 +4,6 @@ const DUMMY_TOKEN_DECIMALS = 18;
 const DUMMY_TOKEN_TOTAL_SUPPLY = 0;
 
 export const constants = {
-    NULL_BYTES: '0x',
     INVALID_OPCODE: 'invalid opcode',
     REVERT: 'revert',
     TESTRPC_NETWORK_ID: 50,
diff --git a/packages/deployer/package.json b/packages/deployer/package.json
index 5ec988ba15..1050c095f9 100644
--- a/packages/deployer/package.json
+++ b/packages/deployer/package.json
@@ -8,7 +8,7 @@
         "build:watch": "tsc -w",
         "build": "yarn clean && copyfiles 'test/fixtures/contracts/**/*' ./lib && tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
         "test": "run-s build run_mocha",
-        "run_mocha": "mocha lib/test/*_test.js",
+        "run_mocha": "mocha lib/test/*_test.js --bail --exit",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
         "compile": "npm run build; node lib/src/cli.js compile",
@@ -47,7 +47,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/deployer/README.md",
     "devDependencies": {
-        "@0xproject/dev-utils": "^0.2.1",
+        "@0xproject/dev-utils": "^0.3.4",
         "@0xproject/monorepo-scripts": "^0.1.17",
         "@0xproject/tslint-config": "^0.4.15",
         "@types/require-from-string": "^1.2.0",
diff --git a/packages/deployer/src/cli.ts b/packages/deployer/src/cli.ts
index 62afe0d4cd..7b32187c43 100644
--- a/packages/deployer/src/cli.ts
+++ b/packages/deployer/src/cli.ts
@@ -41,8 +41,8 @@ async function onCompileCommandAsync(argv: CliOptions): Promise<void> {
  */
 async function onDeployCommandAsync(argv: CliOptions): Promise<void> {
     const url = argv.jsonrpcUrl;
-    const web3Provider = new Web3.providers.HttpProvider(url);
-    const web3Wrapper = new Web3Wrapper(web3Provider);
+    const provider = new Web3.providers.HttpProvider(url);
+    const web3Wrapper = new Web3Wrapper(provider);
     const networkId = await web3Wrapper.getNetworkIdAsync();
     const compilerOpts: CompilerOptions = {
         contractDirs: getContractDirectoriesFromList(argv.contractDirs),
diff --git a/packages/deployer/src/deployer.ts b/packages/deployer/src/deployer.ts
index 84392997cb..ad05417b18 100644
--- a/packages/deployer/src/deployer.ts
+++ b/packages/deployer/src/deployer.ts
@@ -38,17 +38,17 @@ export class Deployer {
         this._artifactsDir = opts.artifactsDir;
         this._networkId = opts.networkId;
         this._defaults = opts.defaults;
-        let web3Provider: Provider;
+        let provider: Provider;
         if (_.isUndefined((opts as ProviderDeployerOptions).provider)) {
             const jsonrpcUrl = (opts as UrlDeployerOptions).jsonrpcUrl;
             if (_.isUndefined(jsonrpcUrl)) {
-                throw new Error(`Deployer options don't contain web3Provider nor jsonrpcUrl. Please pass one of them`);
+                throw new Error(`Deployer options don't contain provider nor jsonrpcUrl. Please pass one of them`);
             }
-            web3Provider = new Web3.providers.HttpProvider(jsonrpcUrl);
+            provider = new Web3.providers.HttpProvider(jsonrpcUrl);
         } else {
-            web3Provider = (opts as ProviderDeployerOptions).provider;
+            provider = (opts as ProviderDeployerOptions).provider;
         }
-        this.web3Wrapper = new Web3Wrapper(web3Provider, this._defaults);
+        this.web3Wrapper = new Web3Wrapper(provider, this._defaults);
     }
     /**
      * Loads a contract's corresponding artifacts and deploys it with the supplied constructor arguments.
@@ -170,7 +170,7 @@ export class Deployer {
             const contractArtifact: ContractArtifact = require(artifactPath);
             return contractArtifact;
         } catch (err) {
-            throw new Error(`Artifact not found for contract: ${contractName}`);
+            throw new Error(`Artifact not found for contract: ${contractName} at ${artifactPath}`);
         }
     }
     /**
diff --git a/packages/deployer/test/deployer_test.ts b/packages/deployer/test/deployer_test.ts
index 050cf7d027..a213932f99 100644
--- a/packages/deployer/test/deployer_test.ts
+++ b/packages/deployer/test/deployer_test.ts
@@ -14,6 +14,7 @@ import {
 
 import { constructor_args, exchange_binary } from './fixtures/exchange_bin';
 import { constants } from './util/constants';
+import { provider } from './util/provider';
 
 const expect = chai.expect;
 
@@ -36,7 +37,7 @@ describe('#Deployer', () => {
     const deployerOpts = {
         artifactsDir,
         networkId: constants.networkId,
-        jsonrpcUrl: constants.jsonrpcUrl,
+        provider,
         defaults: {
             gasPrice: constants.gasPrice,
         },
diff --git a/packages/deployer/test/util/constants.ts b/packages/deployer/test/util/constants.ts
index 5385b8d17c..b93081a802 100644
--- a/packages/deployer/test/util/constants.ts
+++ b/packages/deployer/test/util/constants.ts
@@ -2,7 +2,6 @@ import { BigNumber } from '@0xproject/utils';
 
 export const constants = {
     networkId: 0,
-    jsonrpcUrl: 'http://localhost:8545',
     optimizerEnabled: false,
     gasPrice: new BigNumber(20000000000),
     timeoutMs: 30000,
diff --git a/packages/deployer/test/util/provider.ts b/packages/deployer/test/util/provider.ts
new file mode 100644
index 0000000000..e0fcb362a0
--- /dev/null
+++ b/packages/deployer/test/util/provider.ts
@@ -0,0 +1,9 @@
+import { web3Factory } from '@0xproject/dev-utils';
+import { Provider } from '@0xproject/types';
+import * as Web3 from 'web3';
+
+const providerConfigs = { shouldUseInProcessGanache: true };
+const web3Instance = web3Factory.create(providerConfigs);
+const provider: Provider = web3Instance.currentProvider;
+
+export { provider };
diff --git a/packages/dev-utils/test/blockchain_lifecycle_test.ts b/packages/dev-utils/test/blockchain_lifecycle_test.ts
index 5ed67e0128..2cfad96443 100644
--- a/packages/dev-utils/test/blockchain_lifecycle_test.ts
+++ b/packages/dev-utils/test/blockchain_lifecycle_test.ts
@@ -8,8 +8,8 @@ import { BlockchainLifecycle, web3Factory } from '../src';
 const expect = chai.expect;
 
 describe('BlockchainLifecycle tests', () => {
-    const web3Provider = web3Factory.getRpcProvider();
-    const web3Wrapper = new Web3Wrapper(web3Provider);
+    const provider = web3Factory.getRpcProvider({ shouldUseInProcessGanache: true });
+    const web3Wrapper = new Web3Wrapper(provider);
     const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
     describe('#startAsync/revertAsync', () => {
         it('reverts changes in between', async () => {
diff --git a/packages/dev-utils/test/rpc_test.ts b/packages/dev-utils/test/rpc_test.ts
index 1bdea36134..b6998f6049 100644
--- a/packages/dev-utils/test/rpc_test.ts
+++ b/packages/dev-utils/test/rpc_test.ts
@@ -8,8 +8,8 @@ import { web3Factory } from '../src';
 const expect = chai.expect;
 
 describe('RPC tests', () => {
-    const web3Provider = web3Factory.getRpcProvider();
-    const web3Wrapper = new Web3Wrapper(web3Provider);
+    const provider = web3Factory.getRpcProvider({ shouldUseInProcessGanache: true });
+    const web3Wrapper = new Web3Wrapper(provider);
     describe('#mineBlockAsync', () => {
         it('increases block number when called', async () => {
             const blockNumberBefore = await web3Wrapper.getBlockNumberAsync();
diff --git a/packages/json-schemas/package.json b/packages/json-schemas/package.json
index 2faf29f55a..3ddc831fa0 100644
--- a/packages/json-schemas/package.json
+++ b/packages/json-schemas/package.json
@@ -11,7 +11,7 @@
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
         "test:circleci": "yarn test:coverage",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "run_mocha": "mocha lib/test/**/*_test.js --exit",
         "clean": "shx rm -rf lib test_temp scripts",
         "build": "tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
         "manual:postpublish": "yarn build; node ./scripts/postpublish.js",
diff --git a/packages/metacoin/package.json b/packages/metacoin/package.json
index 4ec0a4f664..f181f52337 100644
--- a/packages/metacoin/package.json
+++ b/packages/metacoin/package.json
@@ -12,7 +12,7 @@
         "build": "tsc",
         "test": "run-s build run_mocha",
         "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
-        "run_mocha": "mocha 'lib/test/**/*.js'",
+        "run_mocha": "mocha lib/test/**/*.js --bail --exit",
         "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'artifacts/Metacoin.json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers --backend ethers && prettier --write 'src/contract_wrappers/**.ts'",
         "coverage:report:text": "istanbul report text",
         "coverage:report:html": "istanbul report html && open coverage/index.html",
diff --git a/packages/migrations/README.md b/packages/migrations/README.md
new file mode 100644
index 0000000000..15129ae85e
--- /dev/null
+++ b/packages/migrations/README.md
@@ -0,0 +1,69 @@
+## Migrations
+
+Migrate the 0x system of smart contracts on the network of your choice using these migrations.
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+If this is your **first** time building this package, you must first build **all** packages within the monorepo. This is because packages that depend on other packages located inside this monorepo are symlinked when run from **within** the monorepo. This allows you to make changes across multiple packages without first publishing dependent packages to NPM. To build all packages, run the following from the monorepo root directory:
+
+```bash
+yarn lerna:rebuild
+```
+
+Or continuously rebuild on change:
+
+```bash
+yarn dev
+```
+
+You can also build this specific package by running the following from within its directory:
+
+```bash
+yarn build
+```
+
+or continuously rebuild on change:
+
+```bash
+yarn build:watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Migrate
+
+In order to migrate the 0x smart contracts to TestRPC/Ganache running at `http://localhost:8545`, run:
+
+```bash
+yarn migrate
+```
diff --git a/packages/migrations/package.json b/packages/migrations/package.json
new file mode 100644
index 0000000000..7ac55124df
--- /dev/null
+++ b/packages/migrations/package.json
@@ -0,0 +1,36 @@
+{
+    "private": true,
+    "name": "@0xproject/migrations",
+    "version": "0.0.1",
+    "description": "0x smart contract migrations",
+    "main": "lib/index.js",
+    "types": "lib/index.d.ts",
+    "scripts": {
+        "build:watch": "tsc -w",
+        "build": "tsc",
+        "clean": "shx rm -rf lib",
+        "lint": "tslint --project . 'src/**/*.ts'",
+        "migrate": "run-s build compile script:migrate",
+        "script:migrate": "node ./lib/migrate.js",
+        "copy_artifacts": "copyfiles 'src/artifacts/**/*' ./lib",
+        "compile": "node ../deployer/lib/src/cli.js compile --contracts ${npm_package_config_contracts} --contracts-dir ../contracts/src/contracts --artifacts-dir src/artifacts"
+    },
+    "config": {
+        "contracts": "Exchange,DummyToken,ZRXToken,Token,WETH9,TokenTransferProxy,MultiSigWallet,MultiSigWalletWithTimeLock,MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress,MaliciousToken,TokenRegistry,Arbitrage,EtherDelta,AccountLevels"
+    },
+    "license": "Apache-2.0",
+    "devDependencies": {
+        "@0xproject/tslint-config": "^0.4.14",
+        "@0xproject/dev-utils": "^0.3.4",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "tslint": "5.8.0",
+        "typescript": "2.7.1"
+    },
+    "dependencies": {
+        "@0xproject/deployer": "^0.4.0",
+        "@0xproject/utils": "^0.5.0",
+        "@0xproject/web3-wrapper": "^0.5.0",
+        "lodash": "^4.17.4"
+    }
+}
diff --git a/packages/migrations/src/globals.d.ts b/packages/migrations/src/globals.d.ts
new file mode 100644
index 0000000000..94e63a32de
--- /dev/null
+++ b/packages/migrations/src/globals.d.ts
@@ -0,0 +1,6 @@
+declare module '*.json' {
+    const json: any;
+    /* tslint:disable */
+    export default json;
+    /* tslint:enable */
+}
diff --git a/packages/migrations/src/index.ts b/packages/migrations/src/index.ts
new file mode 100644
index 0000000000..c342247a35
--- /dev/null
+++ b/packages/migrations/src/index.ts
@@ -0,0 +1 @@
+export { runMigrationsAsync } from './migration';
diff --git a/packages/migrations/src/migrate.ts b/packages/migrations/src/migrate.ts
new file mode 100644
index 0000000000..76dcbd8474
--- /dev/null
+++ b/packages/migrations/src/migrate.ts
@@ -0,0 +1,25 @@
+#!/usr/bin/env node
+import { Deployer } from '@0xproject/deployer';
+import { devConstants } from '@0xproject/dev-utils';
+import { logUtils } from '@0xproject/utils';
+import * as path from 'path';
+
+import { runMigrationsAsync } from './migration';
+
+(async () => {
+    const deployerOpts = {
+        jsonrpcUrl: 'http://localhost:8545',
+        artifactsDir: path.resolve('src', 'artifacts'),
+        networkId: 50,
+        defaults: {
+            gas: devConstants.GAS_ESTIMATE,
+        },
+    };
+
+    const deployer = new Deployer(deployerOpts);
+
+    await runMigrationsAsync(deployer);
+})().catch(err => {
+    logUtils.log(err);
+    process.exit(1);
+});
diff --git a/packages/contracts/migrations/migrate.ts b/packages/migrations/src/migration.ts
similarity index 90%
rename from packages/contracts/migrations/migrate.ts
rename to packages/migrations/src/migration.ts
index cff8af0abf..4827328fc9 100644
--- a/packages/contracts/migrations/migrate.ts
+++ b/packages/migrations/src/migration.ts
@@ -1,12 +1,10 @@
 import { Deployer } from '@0xproject/deployer';
-import { BigNumber } from '@0xproject/utils';
+import { BigNumber, NULL_BYTES } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as _ from 'lodash';
 
-import { constants } from '../util/constants';
-import { ContractName } from '../util/types';
-
-import { tokenInfo } from './config/token_info';
+import { ContractName } from './types';
+import { tokenInfo } from './utils/token_info';
 
 /**
  * Custom migrations should be defined in this function. This will be called with the CLI 'migrate' command.
@@ -20,7 +18,7 @@ export const runMigrationsAsync = async (deployer: Deployer) => {
 
     const tokenTransferProxy = await deployer.deployAndSaveAsync(ContractName.TokenTransferProxy);
     const zrxToken = await deployer.deployAndSaveAsync(ContractName.ZRXToken);
-    const etherToken = await deployer.deployAndSaveAsync(ContractName.EtherToken);
+    const etherToken = await deployer.deployAndSaveAsync(ContractName.WETH9);
     const tokenReg = await deployer.deployAndSaveAsync(ContractName.TokenRegistry);
 
     const exchangeArgs = [zrxToken.address, tokenTransferProxy.address];
@@ -51,8 +49,8 @@ export const runMigrationsAsync = async (deployer: Deployer) => {
         '0x Protocol Token',
         'ZRX',
         18,
-        constants.NULL_BYTES,
-        constants.NULL_BYTES,
+        NULL_BYTES,
+        NULL_BYTES,
         {
             from: owner,
             gas: addTokenGasEstimate,
@@ -63,8 +61,8 @@ export const runMigrationsAsync = async (deployer: Deployer) => {
         'Ether Token',
         'WETH',
         18,
-        constants.NULL_BYTES,
-        constants.NULL_BYTES,
+        NULL_BYTES,
+        NULL_BYTES,
         {
             from: owner,
             gas: addTokenGasEstimate,
diff --git a/packages/migrations/src/types.ts b/packages/migrations/src/types.ts
new file mode 100644
index 0000000000..1887bfd963
--- /dev/null
+++ b/packages/migrations/src/types.ts
@@ -0,0 +1,38 @@
+export interface MultiSigConfig {
+    owners: string[];
+    confirmationsRequired: number;
+    secondsRequired: number;
+}
+
+export interface MultiSigConfigByNetwork {
+    [networkName: string]: MultiSigConfig;
+}
+
+export interface Token {
+    address?: string;
+    name: string;
+    symbol: string;
+    decimals: number;
+    ipfsHash: string;
+    swarmHash: string;
+}
+
+export interface TokenInfoByNetwork {
+    development: Token[];
+    live: Token[];
+}
+
+export enum ContractName {
+    TokenTransferProxy = 'TokenTransferProxy',
+    TokenRegistry = 'TokenRegistry',
+    MultiSigWalletWithTimeLock = 'MultiSigWalletWithTimeLock',
+    Exchange = 'Exchange',
+    ZRXToken = 'ZRXToken',
+    DummyToken = 'DummyToken',
+    WETH9 = 'WETH9',
+    MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress = 'MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress',
+    MaliciousToken = 'MaliciousToken',
+    AccountLevels = 'AccountLevels',
+    EtherDelta = 'EtherDelta',
+    Arbitrage = 'Arbitrage',
+}
diff --git a/packages/contracts/migrations/config/token_info.ts b/packages/migrations/src/utils/token_info.ts
similarity index 53%
rename from packages/contracts/migrations/config/token_info.ts
rename to packages/migrations/src/utils/token_info.ts
index 5fd3db1446..968665c7dd 100644
--- a/packages/contracts/migrations/config/token_info.ts
+++ b/packages/migrations/src/utils/token_info.ts
@@ -1,4 +1,5 @@
-import { constants } from '../../util/constants';
+import { NULL_BYTES } from '@0xproject/utils';
+
 import { Token } from '../types';
 
 export const tokenInfo: Token[] = [
@@ -6,35 +7,35 @@ export const tokenInfo: Token[] = [
         name: 'Augur Reputation Token',
         symbol: 'REP',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Digix DAO Token',
         symbol: 'DGD',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Golem Network Token',
         symbol: 'GNT',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'MakerDAO',
         symbol: 'MKR',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
     {
         name: 'Melon Token',
         symbol: 'MLN',
         decimals: 18,
-        ipfsHash: constants.NULL_BYTES,
-        swarmHash: constants.NULL_BYTES,
+        ipfsHash: NULL_BYTES,
+        swarmHash: NULL_BYTES,
     },
 ];
diff --git a/packages/migrations/tsconfig.json b/packages/migrations/tsconfig.json
new file mode 100644
index 0000000000..f5f4b37c23
--- /dev/null
+++ b/packages/migrations/tsconfig.json
@@ -0,0 +1,7 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["src/**/*"]
+}
diff --git a/packages/migrations/tslint.json b/packages/migrations/tslint.json
new file mode 100644
index 0000000000..ffaefe83a6
--- /dev/null
+++ b/packages/migrations/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": ["@0xproject/tslint-config"]
+}
diff --git a/packages/sol-cov/package.json b/packages/sol-cov/package.json
index 0e17669b55..0eccf099db 100644
--- a/packages/sol-cov/package.json
+++ b/packages/sol-cov/package.json
@@ -11,7 +11,7 @@
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
         "test:circleci": "yarn test:coverage",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "run_mocha": "mocha lib/test/**/*_test.js --exit",
         "clean": "shx rm -rf lib scripts",
         "build": "copyfiles 'test/fixtures/**/*' ./lib && tsc && copyfiles -u 3 './lib/src/monorepo_scripts/**/*' ./scripts",
         "manual:postpublish": "yarn build; node ./scripts/postpublish.js",
diff --git a/packages/sol-cov/src/coverage_subprovider.ts b/packages/sol-cov/src/coverage_subprovider.ts
index fc8b55188c..6504d5a461 100644
--- a/packages/sol-cov/src/coverage_subprovider.ts
+++ b/packages/sol-cov/src/coverage_subprovider.ts
@@ -56,8 +56,8 @@ export class CoverageSubprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: NextCallback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: NextCallback, end: ErrorCallback) {
         switch (payload.method) {
             case 'eth_sendTransaction':
                 const txData = payload.params[0];
diff --git a/packages/sra-report/package.json b/packages/sra-report/package.json
index c889f1cb51..1d0163b827 100644
--- a/packages/sra-report/package.json
+++ b/packages/sra-report/package.json
@@ -12,7 +12,7 @@
         "test": "run-s clean build copy_test_environments copy_test_fixtures run_mocha",
         "copy_test_fixtures": "copyfiles -u 2 './test/fixtures/**/*.json' ./lib/test/fixtures",
         "copy_test_environments": "copyfiles -u 2 './test/environments/**/*.json' ./lib/test/environments",
-        "run_mocha": "mocha lib/test/**/*_test.js",
+        "run_mocha": "mocha lib/test/**/*_test.js --exit",
         "manual:postpublish": "yarn build; node ./scripts/postpublish.js"
     },
     "bin": {
diff --git a/packages/subproviders/CHANGELOG.json b/packages/subproviders/CHANGELOG.json
index 4431238bef..6ab3e70933 100644
--- a/packages/subproviders/CHANGELOG.json
+++ b/packages/subproviders/CHANGELOG.json
@@ -1,7 +1,12 @@
 [
     {
-        "version": "0.8.5",
+        "version": "0.9.0",
         "changes": [
+            {
+                "note":
+                    "Refactor RedundantRPCSubprovider into RedundantSubprovider where it now accepts an array of subproviders rather then an array of RPC endpoints",
+                "pr": 500
+            },
             {
                 "note": "Add private key subprovider and refactor shared functionality into a base wallet subprovider",
                 "pr": 506
diff --git a/packages/subproviders/src/index.ts b/packages/subproviders/src/index.ts
index dd553fde45..b84473e45f 100644
--- a/packages/subproviders/src/index.ts
+++ b/packages/subproviders/src/index.ts
@@ -7,7 +7,7 @@ import { LedgerEthereumClient } from './types';
 export { EmptyWalletSubprovider } from './subproviders/empty_wallet_subprovider';
 export { FakeGasEstimateSubprovider } from './subproviders/fake_gas_estimate_subprovider';
 export { InjectedWeb3Subprovider } from './subproviders/injected_web3';
-export { RedundantRPCSubprovider } from './subproviders/redundant_rpc';
+export { RedundantSubprovider } from './subproviders/redundant_subprovider';
 export { LedgerSubprovider } from './subproviders/ledger';
 export { GanacheSubprovider } from './subproviders/ganache';
 export { Subprovider } from './subproviders/subprovider';
diff --git a/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts b/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
index 595ec654df..8f152dc0a0 100644
--- a/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
+++ b/packages/subproviders/src/subproviders/empty_wallet_subprovider.ts
@@ -17,8 +17,8 @@ export class EmptyWalletSubprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
         switch (payload.method) {
             case 'eth_accounts':
                 end(null, []);
diff --git a/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts b/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
index 966c37d8a5..54fd7bcb95 100644
--- a/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
+++ b/packages/subproviders/src/subproviders/fake_gas_estimate_subprovider.ts
@@ -31,8 +31,8 @@ export class FakeGasEstimateSubprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
         switch (payload.method) {
             case 'eth_estimateGas':
                 end(null, this._constantGasAmount);
diff --git a/packages/subproviders/src/subproviders/ganache.ts b/packages/subproviders/src/subproviders/ganache.ts
index 8008d1b4bc..debd7ecf04 100644
--- a/packages/subproviders/src/subproviders/ganache.ts
+++ b/packages/subproviders/src/subproviders/ganache.ts
@@ -27,8 +27,8 @@ export class GanacheSubprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
         this._ganacheProvider.sendAsync(payload, (err: Error | null, result: any) => {
             end(err, result && result.result);
         });
diff --git a/packages/subproviders/src/subproviders/injected_web3.ts b/packages/subproviders/src/subproviders/injected_web3.ts
index 1d7b2ddfef..3ca0c4bd0d 100644
--- a/packages/subproviders/src/subproviders/injected_web3.ts
+++ b/packages/subproviders/src/subproviders/injected_web3.ts
@@ -30,8 +30,8 @@ export class InjectedWeb3Subprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
         switch (payload.method) {
             case 'web3_clientVersion':
                 this._injectedWeb3.version.getNode(end);
diff --git a/packages/subproviders/src/subproviders/redundant_rpc.ts b/packages/subproviders/src/subproviders/redundant_subprovider.ts
similarity index 71%
rename from packages/subproviders/src/subproviders/redundant_rpc.ts
rename to packages/subproviders/src/subproviders/redundant_subprovider.ts
index f8ff0915de..37c8bba5a9 100644
--- a/packages/subproviders/src/subproviders/redundant_rpc.ts
+++ b/packages/subproviders/src/subproviders/redundant_subprovider.ts
@@ -1,7 +1,6 @@
 import { JSONRPCRequestPayload } from '@0xproject/types';
 import { promisify } from '@0xproject/utils';
 import * as _ from 'lodash';
-import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import { Callback } from '../types';
 
@@ -12,17 +11,17 @@ import { Subprovider } from './subprovider';
  * It attempts to handle each JSON RPC request by sequentially attempting to receive a valid response from one of a
  * set of JSON RPC endpoints.
  */
-export class RedundantRPCSubprovider extends Subprovider {
-    private _rpcs: RpcSubprovider[];
+export class RedundantSubprovider extends Subprovider {
+    private _subproviders: Subprovider[];
     private static async _firstSuccessAsync(
-        rpcs: RpcSubprovider[],
+        subproviders: Subprovider[],
         payload: JSONRPCRequestPayload,
         next: Callback,
     ): Promise<any> {
         let lastErr: Error | undefined;
-        for (const rpc of rpcs) {
+        for (const subprovider of subproviders) {
             try {
-                const data = await promisify(rpc.handleRequest.bind(rpc))(payload, next);
+                const data = await promisify(subprovider.handleRequest.bind(subprovider))(payload, next);
                 return data;
             } catch (err) {
                 lastErr = err;
@@ -34,16 +33,12 @@ export class RedundantRPCSubprovider extends Subprovider {
         }
     }
     /**
-     * Instantiates a new RedundantRPCSubprovider
+     * Instantiates a new RedundantSubprovider
      * @param endpoints JSON RPC endpoints to attempt. Attempts are made in the order of the endpoints.
      */
-    constructor(endpoints: string[]) {
+    constructor(subproviders: Subprovider[]) {
         super();
-        this._rpcs = _.map(endpoints, endpoint => {
-            return new RpcSubprovider({
-                rpcUrl: endpoint,
-            });
-        });
+        this._subproviders = subproviders;
     }
     /**
      * This method conforms to the web3-provider-engine interface.
@@ -59,9 +54,9 @@ export class RedundantRPCSubprovider extends Subprovider {
         next: Callback,
         end: (err: Error | null, data?: any) => void,
     ): Promise<void> {
-        const rpcsCopy = this._rpcs.slice();
+        const subprovidersCopy = this._subproviders.slice();
         try {
-            const data = await RedundantRPCSubprovider._firstSuccessAsync(rpcsCopy, payload, next);
+            const data = await RedundantSubprovider._firstSuccessAsync(subprovidersCopy, payload, next);
             end(null, data);
         } catch (err) {
             end(err);
diff --git a/packages/subproviders/src/subproviders/subprovider.ts b/packages/subproviders/src/subproviders/subprovider.ts
index c51462f078..2118f52c88 100644
--- a/packages/subproviders/src/subproviders/subprovider.ts
+++ b/packages/subproviders/src/subproviders/subprovider.ts
@@ -2,13 +2,14 @@ import { JSONRPCRequestPayload, JSONRPCResponsePayload } from '@0xproject/types'
 import { promisify } from '@0xproject/utils';
 import * as Web3 from 'web3';
 
-import { JSONRPCRequestPayloadWithMethod } from '../types';
+import { Callback, ErrorCallback, JSONRPCRequestPayloadWithMethod } from '../types';
 /**
  * A altered version of the base class Subprovider found in [web3-provider-engine](https://github.com/MetaMask/provider-engine).
  * This one has an async/await `emitPayloadAsync` and also defined types.
  */
-export class Subprovider {
-    private _engine: any;
+export abstract class Subprovider {
+    // tslint:disable-next-line:underscore-private-and-protected
+    private engine: any;
     // Ported from: https://github.com/MetaMask/provider-engine/blob/master/util/random-id.js
     private static _getRandomId() {
         const extraDigits = 3;
@@ -31,6 +32,13 @@ export class Subprovider {
         };
         return finalPayload;
     }
+    // tslint:disable-next-line:async-suffix
+    public abstract async handleRequest(
+        payload: JSONRPCRequestPayload,
+        next: Callback,
+        end: ErrorCallback,
+    ): Promise<void>;
+
     /**
      * Emits a JSON RPC payload that will then be handled by the ProviderEngine instance
      * this subprovider is a part of. The payload will cascade down the subprovider middleware
@@ -40,7 +48,7 @@ export class Subprovider {
      */
     public async emitPayloadAsync(payload: Partial<JSONRPCRequestPayloadWithMethod>): Promise<JSONRPCResponsePayload> {
         const finalPayload = Subprovider._createFinalPayload(payload);
-        const response = await promisify<JSONRPCResponsePayload>(this._engine.sendAsync, this._engine)(finalPayload);
+        const response = await promisify<JSONRPCResponsePayload>(this.engine.sendAsync, this.engine)(finalPayload);
         return response;
     }
     /**
@@ -49,6 +57,6 @@ export class Subprovider {
      * directly.
      */
     public setEngine(engine: any): void {
-        this._engine = engine;
+        this.engine = engine;
     }
 }
diff --git a/packages/subproviders/test/integration/ledger_subprovider_test.ts b/packages/subproviders/test/integration/ledger_subprovider_test.ts
index 503618089d..9e81dfac5a 100644
--- a/packages/subproviders/test/integration/ledger_subprovider_test.ts
+++ b/packages/subproviders/test/integration/ledger_subprovider_test.ts
@@ -1,7 +1,7 @@
 import { JSONRPCResponsePayload } from '@0xproject/types';
 import { promisify } from '@0xproject/utils';
 import Eth from '@ledgerhq/hw-app-eth';
-// HACK: This depdency is optional and tslint skips optional depdencies
+// HACK: This dependency is optional and tslint skips optional dependencies
 // tslint:disable-next-line:no-implicit-dependencies
 import TransportNodeHid from '@ledgerhq/hw-transport-node-hid';
 import * as chai from 'chai';
diff --git a/packages/subproviders/test/unit/ledger_subprovider_test.ts b/packages/subproviders/test/unit/ledger_subprovider_test.ts
index c18506681d..88d38f59ba 100644
--- a/packages/subproviders/test/unit/ledger_subprovider_test.ts
+++ b/packages/subproviders/test/unit/ledger_subprovider_test.ts
@@ -4,7 +4,6 @@ import * as ethUtils from 'ethereumjs-util';
 import * as _ from 'lodash';
 import Web3 = require('web3');
 import Web3ProviderEngine = require('web3-provider-engine');
-import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import { LedgerSubprovider } from '../../src';
 import {
@@ -15,6 +14,7 @@ import {
 } from '../../src/types';
 import { chaiSetup } from '../chai_setup';
 import { fixtureData } from '../utils/fixture_data';
+import { ganacheSubprovider } from '../utils/ganache_subprovider';
 import { reportCallbackErrors } from '../utils/report_callback_errors';
 
 chaiSetup.configure();
@@ -105,10 +105,7 @@ describe('LedgerSubprovider', () => {
         before(() => {
             provider = new Web3ProviderEngine();
             provider.addProvider(ledgerSubprovider);
-            const httpProvider = new RpcSubprovider({
-                rpcUrl: 'http://localhost:8545',
-            });
-            provider.addProvider(httpProvider);
+            provider.addProvider(ganacheSubprovider);
             provider.start();
         });
         describe('success cases', () => {
diff --git a/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts b/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
index a347ab765b..e25cb7eb7f 100644
--- a/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
+++ b/packages/subproviders/test/unit/redundant_rpc_subprovider_test.ts
@@ -3,21 +3,24 @@ import * as chai from 'chai';
 import * as _ from 'lodash';
 import Web3 = require('web3');
 import Web3ProviderEngine = require('web3-provider-engine');
+import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
-import { RedundantRPCSubprovider } from '../../src';
+import { RedundantSubprovider } from '../../src';
+import { Subprovider } from '../../src/subproviders/subprovider';
 import { DoneCallback } from '../../src/types';
 import { chaiSetup } from '../chai_setup';
+import { ganacheSubprovider } from '../utils/ganache_subprovider';
 import { reportCallbackErrors } from '../utils/report_callback_errors';
 
 const expect = chai.expect;
 chaiSetup.configure();
 
-describe('RedundantRpcSubprovider', () => {
+describe('RedundantSubprovider', () => {
     let provider: Web3ProviderEngine;
     it('succeeds when supplied a healthy endpoint', (done: DoneCallback) => {
         provider = new Web3ProviderEngine();
-        const endpoints = ['http://localhost:8545'];
-        const redundantSubprovider = new RedundantRPCSubprovider(endpoints);
+        const subproviders = [ganacheSubprovider];
+        const redundantSubprovider = new RedundantSubprovider(subproviders);
         provider.addProvider(redundantSubprovider);
         provider.start();
 
@@ -36,8 +39,11 @@ describe('RedundantRpcSubprovider', () => {
     });
     it('succeeds when supplied at least one healthy endpoint', (done: DoneCallback) => {
         provider = new Web3ProviderEngine();
-        const endpoints = ['http://does-not-exist:3000', 'http://localhost:8545'];
-        const redundantSubprovider = new RedundantRPCSubprovider(endpoints);
+        const nonExistentSubprovider = new RpcSubprovider({
+            rpcUrl: 'http://does-not-exist:3000',
+        });
+        const subproviders = [nonExistentSubprovider as Subprovider, ganacheSubprovider];
+        const redundantSubprovider = new RedundantSubprovider(subproviders);
         provider.addProvider(redundantSubprovider);
         provider.start();
 
diff --git a/packages/subproviders/test/utils/configs.ts b/packages/subproviders/test/utils/configs.ts
new file mode 100644
index 0000000000..341037e4f6
--- /dev/null
+++ b/packages/subproviders/test/utils/configs.ts
@@ -0,0 +1,5 @@
+export const configs = {
+    port: 8545,
+    networkId: 50,
+    mnemonic: 'concert load couple harbor equip island argue ramp clarify fence smart topic',
+};
diff --git a/packages/subproviders/test/utils/ganache_subprovider.ts b/packages/subproviders/test/utils/ganache_subprovider.ts
new file mode 100644
index 0000000000..ac4a9325c3
--- /dev/null
+++ b/packages/subproviders/test/utils/ganache_subprovider.ts
@@ -0,0 +1,18 @@
+import * as fs from 'fs';
+
+import { GanacheSubprovider } from '../../src/subproviders/ganache';
+import { configs } from '../utils/configs';
+
+const logger = {
+    log: (arg: any) => {
+        fs.appendFileSync('ganache.log', `${arg}\n`);
+    },
+};
+
+export const ganacheSubprovider = new GanacheSubprovider({
+    logger,
+    verbose: false,
+    port: configs.port,
+    networkId: configs.networkId,
+    mnemonic: configs.mnemonic,
+});
diff --git a/packages/utils/CHANGELOG.json b/packages/utils/CHANGELOG.json
index 0dbb32b157..dada0eab35 100644
--- a/packages/utils/CHANGELOG.json
+++ b/packages/utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "version": "0.5.2",
+        "changes": [
+            {
+                "note": "Export NULL_BYTES constant",
+                "pr": 500
+            }
+        ]
+    },
     {
         "timestamp": 1523462196,
         "version": "0.5.1",
diff --git a/packages/utils/src/constants.ts b/packages/utils/src/constants.ts
new file mode 100644
index 0000000000..2894d47474
--- /dev/null
+++ b/packages/utils/src/constants.ts
@@ -0,0 +1 @@
+export const NULL_BYTES = '0x';
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index 0da4b265d7..75c096ee6c 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -6,3 +6,5 @@ export { BigNumber } from './configured_bignumber';
 export { AbiDecoder } from './abi_decoder';
 export { logUtils } from './log_utils';
 export { abiUtils } from './abi_utils';
+
+export { NULL_BYTES } from './constants';
diff --git a/packages/website/package.json b/packages/website/package.json
index 86946d2d13..a8011dc8d6 100644
--- a/packages/website/package.json
+++ b/packages/website/package.json
@@ -8,13 +8,9 @@
         "clean": "shx rm -f public/bundle*",
         "lint": "tslint --project . 'ts/**/*.ts' 'ts/**/*.tsx'",
         "dev": "webpack-dev-server --content-base public --https",
-        "update_contracts": "for i in ${npm_package_config_artifacts}; do copyfiles -u 4 ../contracts/build/contracts/$i.json ../website/contracts; done;",
         "deploy_staging": "npm run build; aws s3 sync ./public/. s3://staging-0xproject --profile 0xproject --region us-east-1 --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers",
         "deploy_live": "npm run build; aws s3 sync ./public/. s3://0xproject.com --profile 0xproject --region us-east-1 --grants read=uri=http://acs.amazonaws.com/groups/global/AllUsers"
     },
-    "config": {
-        "artifacts": "Mintable"
-    },
     "author": "Fabio Berger",
     "license": "Apache-2.0",
     "dependencies": {
diff --git a/packages/website/ts/blockchain.ts b/packages/website/ts/blockchain.ts
index fd34ab82d9..7d79542a33 100644
--- a/packages/website/ts/blockchain.ts
+++ b/packages/website/ts/blockchain.ts
@@ -21,7 +21,8 @@ import {
     ledgerEthereumBrowserClientFactoryAsync,
     LedgerSubprovider,
     LedgerWalletSubprovider,
-    RedundantRPCSubprovider,
+    RedundantSubprovider,
+    Subprovider,
 } from '@0xproject/subproviders';
 import { Provider } from '@0xproject/types';
 import { BigNumber, intervalUtils, logUtils, promisify } from '@0xproject/utils';
@@ -54,6 +55,7 @@ import { utils } from 'ts/utils/utils';
 import Web3 = require('web3');
 import ProviderEngine = require('web3-provider-engine');
 import FilterSubprovider = require('web3-provider-engine/subproviders/filters');
+import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
 
 import * as MintableArtifacts from '../contracts/Mintable.json';
 
@@ -98,7 +100,12 @@ export class Blockchain {
             provider = new ProviderEngine();
             provider.addProvider(new InjectedWeb3Subprovider(injectedWeb3.currentProvider));
             provider.addProvider(new FilterSubprovider());
-            provider.addProvider(new RedundantRPCSubprovider(publicNodeUrlsIfExistsForNetworkId));
+            const rpcSubproviders = _.map(publicNodeUrlsIfExistsForNetworkId, publicNodeUrl => {
+                return new RpcSubprovider({
+                    rpcUrl: publicNodeUrl,
+                });
+            });
+            provider.addProvider(new RedundantSubprovider(rpcSubproviders as Subprovider[]));
             provider.start();
         } else if (doesInjectedWeb3Exist) {
             // Since no public node for this network, all requests go to injectedWeb3 instance
@@ -110,7 +117,12 @@ export class Blockchain {
             provider = new ProviderEngine();
             provider.addProvider(new FilterSubprovider());
             const networkId = configs.IS_MAINNET_ENABLED ? constants.NETWORK_ID_MAINNET : constants.NETWORK_ID_KOVAN;
-            provider.addProvider(new RedundantRPCSubprovider(configs.PUBLIC_NODE_URLS_BY_NETWORK_ID[networkId]));
+            const rpcSubproviders = _.map(configs.PUBLIC_NODE_URLS_BY_NETWORK_ID[networkId], publicNodeUrl => {
+                return new RpcSubprovider({
+                    rpcUrl: publicNodeUrl,
+                });
+            });
+            provider.addProvider(new RedundantSubprovider(rpcSubproviders as Subprovider[]));
             provider.start();
         }
 
@@ -201,7 +213,12 @@ export class Blockchain {
         this._ledgerSubprovider = new LedgerSubprovider(ledgerWalletConfigs);
         provider.addProvider(this._ledgerSubprovider);
         provider.addProvider(new FilterSubprovider());
-        provider.addProvider(new RedundantRPCSubprovider(configs.PUBLIC_NODE_URLS_BY_NETWORK_ID[networkId]));
+        const rpcSubproviders = _.map(configs.PUBLIC_NODE_URLS_BY_NETWORK_ID[networkId], publicNodeUrl => {
+            return new RpcSubprovider({
+                rpcUrl: publicNodeUrl,
+            });
+        });
+        provider.addProvider(new RedundantSubprovider(rpcSubproviders as Subprovider[]));
         provider.start();
         this.networkId = networkId;
         this._dispatcher.updateNetworkId(this.networkId);
diff --git a/yarn.lock b/yarn.lock
index 3d2d6a8179..265b194e3c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6,41 +6,6 @@
   version "0.3.9"
   resolved "https://registry.yarnpkg.com/8fold-marked/-/8fold-marked-0.3.9.tgz#bb89c645612f8ccfaffac1ca6e3c11f168c9cf59"
 
-"@0xproject/dev-utils@^0.2.1":
-  version "0.2.1"
-  resolved "https://registry.yarnpkg.com/@0xproject/dev-utils/-/dev-utils-0.2.1.tgz#a54465376fd7c8cf58781b02b1790d74fb51e91b"
-  dependencies:
-    "@0xproject/subproviders" "^0.7.0"
-    "@0xproject/types" "^0.3.1"
-    "@0xproject/utils" "^0.4.1"
-    ethereumjs-util "^5.1.2"
-    lodash "^4.17.4"
-    request-promise-native "^1.0.5"
-    web3 "^0.20.0"
-    web3-provider-engine "^13.0.1"
-
-"@0xproject/subproviders@^0.7.0":
-  version "0.7.0"
-  resolved "https://registry.yarnpkg.com/@0xproject/subproviders/-/subproviders-0.7.0.tgz#ce3379a85649773e5c08f5fc3239e8ed07f13361"
-  dependencies:
-    "@0xproject/assert" "^0.2.0"
-    "@0xproject/types" "^0.3.1"
-    "@0xproject/utils" "^0.4.1"
-    "@ledgerhq/hw-app-eth" "^4.3.0"
-    "@ledgerhq/hw-transport-u2f" "^4.3.0"
-    bn.js "^4.11.8"
-    es6-promisify "^5.0.0"
-    ethereumjs-tx "^1.3.3"
-    ethereumjs-util "^5.1.1"
-    hdkey "^0.7.1"
-    lodash "^4.17.4"
-    semaphore-async-await "^1.5.1"
-    web3 "^0.20.0"
-    web3-provider-engine "^13.0.1"
-    web3-typescript-typings "^0.10.0"
-  optionalDependencies:
-    "@ledgerhq/hw-transport-node-hid" "^4.3.0"
-
 "@0xproject/tslint-config@0.4.13":
   version "0.4.13"
   resolved "https://registry.yarnpkg.com/@0xproject/tslint-config/-/tslint-config-0.4.13.tgz#98c71c5ae5e80315a23eda0134cc9f6f4438cac2"
@@ -50,40 +15,6 @@
     tslint-eslint-rules "^4.1.1"
     tslint-react "^3.2.0"
 
-"@0xproject/types@^0.3.1":
-  version "0.3.1"
-  resolved "https://registry.yarnpkg.com/@0xproject/types/-/types-0.3.1.tgz#9a75be6d3a2d41b7ecbd9105c3fdc09f3e3ec297"
-  dependencies:
-    bignumber.js "~4.1.0"
-    web3 "^0.20.0"
-    web3-typescript-typings "^0.10.0"
-
-"@0xproject/types@^0.4.2":
-  version "0.4.2"
-  resolved "https://registry.yarnpkg.com/@0xproject/types/-/types-0.4.2.tgz#83d6ebef60f41e6209acb2656b1d68ff79367ca5"
-  dependencies:
-    bignumber.js "~4.1.0"
-
-"@0xproject/typescript-typings@^0.0.2":
-  version "0.0.2"
-  resolved "https://registry.yarnpkg.com/@0xproject/typescript-typings/-/typescript-typings-0.0.2.tgz#b549ea3c81ce2d81b99f05583bdf7c411a3ca90c"
-  dependencies:
-    "@0xproject/types" "^0.4.2"
-    bignumber.js "~4.1.0"
-
-"@0xproject/utils@^0.4.1":
-  version "0.4.4"
-  resolved "https://registry.yarnpkg.com/@0xproject/utils/-/utils-0.4.4.tgz#bce4f7a5a46570a69911f4a4ade5d49016330087"
-  dependencies:
-    "@0xproject/types" "^0.4.2"
-    "@0xproject/typescript-typings" "^0.0.2"
-    "@types/node" "^8.0.53"
-    bignumber.js "~4.1.0"
-    ethers-contracts "^2.2.1"
-    js-sha3 "^0.7.0"
-    lodash "^4.17.4"
-    web3 "^0.20.0"
-
 "@ledgerhq/hw-app-eth@^4.3.0":
   version "4.7.3"
   resolved "https://registry.yarnpkg.com/@ledgerhq/hw-app-eth/-/hw-app-eth-4.7.3.tgz#d352e19658ae296532e522c53c8ec2a1a77b64e5"
@@ -3653,7 +3584,7 @@ ethereumjs-util@^4.0.1, ethereumjs-util@^4.3.0, ethereumjs-util@^4.4.0:
     rlp "^2.0.0"
     secp256k1 "^3.0.1"
 
-ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereumjs-util@^5.1.2, ethereumjs-util@^5.1.3, ethereumjs-util@^5.1.5:
+ethereumjs-util@^5.0.0, ethereumjs-util@^5.0.1, ethereumjs-util@^5.1.1, ethereumjs-util@^5.1.3, ethereumjs-util@^5.1.5:
   version "5.1.5"
   resolved "https://registry.yarnpkg.com/ethereumjs-util/-/ethereumjs-util-5.1.5.tgz#2f02575852627d45622426f25ee4a0b5f377f27a"
   dependencies:
@@ -8988,20 +8919,6 @@ request-ip@~1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/request-ip/-/request-ip-1.2.3.tgz#66988f0e22406ec4af630d19b573fe4b447c3b49"
 
-request-promise-core@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/request-promise-core/-/request-promise-core-1.1.1.tgz#3eee00b2c5aa83239cfb04c5700da36f81cd08b6"
-  dependencies:
-    lodash "^4.13.1"
-
-request-promise-native@^1.0.5:
-  version "1.0.5"
-  resolved "https://registry.yarnpkg.com/request-promise-native/-/request-promise-native-1.0.5.tgz#5281770f68e0c9719e5163fd3fab482215f4fda5"
-  dependencies:
-    request-promise-core "1.1.1"
-    stealthy-require "^1.1.0"
-    tough-cookie ">=2.3.3"
-
 request@2.81.0:
   version "2.81.0"
   resolved "https://registry.yarnpkg.com/request/-/request-2.81.0.tgz#c6928946a0e06c5f8d6f8a9333469ffda46298a0"
@@ -9887,10 +9804,6 @@ static-extend@^0.1.1:
   version "1.4.0"
   resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.4.0.tgz#bb73d446da2796106efcc1b601a253d6c46bd087"
 
-stealthy-require@^1.1.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/stealthy-require/-/stealthy-require-1.1.1.tgz#35b09875b4ff49f26a777e509b3090a3226bf24b"
-
 stream-browserify@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/stream-browserify/-/stream-browserify-2.0.1.tgz#66266ee5f9bdb9940a4e4514cafb43bb71e5c9db"
@@ -10463,7 +10376,7 @@ touch@^3.1.0:
   dependencies:
     nopt "~1.0.10"
 
-tough-cookie@>=2.3.3, tough-cookie@~2.3.0, tough-cookie@~2.3.3:
+tough-cookie@~2.3.0, tough-cookie@~2.3.3:
   version "2.3.4"
   resolved "https://registry.yarnpkg.com/tough-cookie/-/tough-cookie-2.3.4.tgz#ec60cee38ac675063ffc97a5c18970578ee83655"
   dependencies:
@@ -11418,7 +11331,7 @@ web3-shh@1.0.0-beta.33:
     web3-core-subscriptions "1.0.0-beta.33"
     web3-net "1.0.0-beta.33"
 
-web3-typescript-typings@^0.10.0, web3-typescript-typings@^0.10.2:
+web3-typescript-typings@^0.10.2:
   version "0.10.2"
   resolved "https://registry.yarnpkg.com/web3-typescript-typings/-/web3-typescript-typings-0.10.2.tgz#a9903815d2a8a0dbd73fd5db374070de0bd30497"
   dependencies: