Update contract-wrappers package to use new contracts package for generated files

15 files changed, 110 insertions, 154 deletions

diff --git a/packages/contract-wrappers/package.json b/packages/contract-wrappers/package.json
index 35f27d77c..70efccec6 100644
--- a/packages/contract-wrappers/package.json
+++ b/packages/contract-wrappers/package.json
@@ -11,24 +11,19 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "build": "yarn pre_build && tsc -b",
+        "build": "tsc -b",
         "build:ci": "yarn build",
-        "pre_build": "run-s update_artifacts generate_contract_wrappers copy_artifacts",
-        "generate_contract_wrappers": "abi-gen --abis 'src/artifacts/@(Exchange|DummyERC20Token|DummyERC721Token|ZRXToken|ERC20Token|ERC721Token|WETH9|ERC20Proxy|ERC721Proxy|Forwarder|OrderValidator).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers",
         "lint": "tslint --project . --exclude **/src/contract_wrappers/**/* --exclude **/lib/**/*",
         "test:circleci": "run-s test:coverage",
         "test": "yarn run_mocha",
         "rebuild_and_test": "run-s build test",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
-        "update_artifacts": "for i in ${npm_package_config_contracts_v2}; do copyfiles -u 4 ../migrations/artifacts/2.0.0-trimmed/$i.json src/artifacts; done;",
-        "copy_artifacts": "copyfiles -u 2 './src/artifacts/**/*.json' ./lib/src/artifacts",
-        "clean": "shx rm -rf _bundles lib test_temp test/artifacts src/contract_wrappers/generated src/artifacts generated_docs",
+        "clean": "shx rm -rf _bundles lib test_temp generated_docs",
         "run_mocha": "mocha --require source-map-support/register --require make-promises-safe lib/test/**/*_test.js lib/test/global_hooks.js --timeout 10000 --bail --exit",
         "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES"
     },
     "config": {
-        "contracts_v2": "AssetProxyOwner Exchange ERC20Proxy ERC20Token ERC721Proxy ERC721Token WETH9 ZRXToken Forwarder OrderValidator DummyERC20Token DummyERC721Token",
         "postpublish": {
             "assets": []
         }
@@ -72,6 +67,7 @@
         "web3-provider-engine": "14.0.6"
     },
     "dependencies": {
+        "@0xproject/contracts": "^2.0.0",
         "@0xproject/assert": "^1.0.13",
         "@0xproject/base-contract": "^3.0.1",
         "@0xproject/fill-scenarios": "^1.0.7",
diff --git a/packages/contract-wrappers/src/artifacts.ts b/packages/contract-wrappers/src/artifacts.ts
deleted file mode 100644
index 925f34162..000000000
--- a/packages/contract-wrappers/src/artifacts.ts
+++ /dev/null
@@ -1,27 +0,0 @@
-import { ContractArtifact } from 'ethereum-types';
-
-import * as DummyERC20Token from './artifacts/DummyERC20Token.json';
-import * as DummyERC721Token from './artifacts/DummyERC721Token.json';
-import * as ERC20Proxy from './artifacts/ERC20Proxy.json';
-import * as ERC20Token from './artifacts/ERC20Token.json';
-import * as ERC721Proxy from './artifacts/ERC721Proxy.json';
-import * as ERC721Token from './artifacts/ERC721Token.json';
-import * as Exchange from './artifacts/Exchange.json';
-import * as Forwarder from './artifacts/Forwarder.json';
-import * as OrderValidator from './artifacts/OrderValidator.json';
-import * as EtherToken from './artifacts/WETH9.json';
-import * as ZRXToken from './artifacts/ZRXToken.json';
-
-export const artifacts = {
-    ZRXToken: (ZRXToken as any) as ContractArtifact,
-    DummyERC20Token: (DummyERC20Token as any) as ContractArtifact,
-    DummyERC721Token: (DummyERC721Token as any) as ContractArtifact,
-    ERC20Token: (ERC20Token as any) as ContractArtifact,
-    ERC721Token: (ERC721Token as any) as ContractArtifact,
-    Exchange: (Exchange as any) as ContractArtifact,
-    EtherToken: (EtherToken as any) as ContractArtifact,
-    ERC20Proxy: (ERC20Proxy as any) as ContractArtifact,
-    ERC721Proxy: (ERC721Proxy as any) as ContractArtifact,
-    Forwarder: (Forwarder as any) as ContractArtifact,
-    OrderValidator: (OrderValidator as any) as ContractArtifact,
-};
diff --git a/packages/contract-wrappers/src/contract_wrappers.ts b/packages/contract-wrappers/src/contract_wrappers.ts
index 89402029b..b272fabda 100644
--- a/packages/contract-wrappers/src/contract_wrappers.ts
+++ b/packages/contract-wrappers/src/contract_wrappers.ts
@@ -1,10 +1,8 @@
+import { artifacts } from '@0xproject/contracts';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { Provider } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { constants } from './utils/constants';
-
-import { artifacts } from './artifacts';
 import { ERC20ProxyWrapper } from './contract_wrappers/erc20_proxy_wrapper';
 import { ERC20TokenWrapper } from './contract_wrappers/erc20_token_wrapper';
 import { ERC721ProxyWrapper } from './contract_wrappers/erc721_proxy_wrapper';
@@ -18,6 +16,7 @@ import { contractWrappersPrivateNetworkConfigSchema } from './schemas/contract_w
 import { contractWrappersPublicNetworkConfigSchema } from './schemas/contract_wrappers_public_network_config_schema';
 import { ContractWrappersConfig } from './types';
 import { assert } from './utils/assert';
+import { constants } from './utils/constants';
 /**
  * The ContractWrappers class contains smart contract wrappers helpful when building on 0x protocol.
  */
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
index ff027d78a..5900f0502 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc20_proxy_wrapper.ts
@@ -1,20 +1,19 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { AssetProxyId } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { assert } from '../utils/assert';
 
 import { ContractWrapper } from './contract_wrapper';
-import { ERC20ProxyContract } from './generated/erc20_proxy';
 
 /**
  * This class includes the functionality related to interacting with the ERC20Proxy contract.
  */
 export class ERC20ProxyWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.ERC20Proxy.compilerOutput.abi;
-    private _erc20ProxyContractIfExists?: ERC20ProxyContract;
+    private _erc20ProxyContractIfExists?: wrappers.ERC20ProxyContract;
     private _contractAddressIfExists?: string;
     /**
      * Instantiate ERC20ProxyWrapper
@@ -72,7 +71,7 @@ export class ERC20ProxyWrapper extends ContractWrapper {
     private _invalidateContractInstance(): void {
         delete this._erc20ProxyContractIfExists;
     }
-    private async _getERC20ProxyContractAsync(): Promise<ERC20ProxyContract> {
+    private async _getERC20ProxyContractAsync(): Promise<wrappers.ERC20ProxyContract> {
         if (!_.isUndefined(this._erc20ProxyContractIfExists)) {
             return this._erc20ProxyContractIfExists;
         }
@@ -80,7 +79,7 @@ export class ERC20ProxyWrapper extends ContractWrapper {
             artifacts.ERC20Proxy,
             this._contractAddressIfExists,
         );
-        const contractInstance = new ERC20ProxyContract(
+        const contractInstance = new wrappers.ERC20ProxyContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc20_token_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc20_token_wrapper.ts
index 4625cef6a..3be5bcaee 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc20_token_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc20_token_wrapper.ts
@@ -1,10 +1,10 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { methodOptsSchema } from '../schemas/method_opts_schema';
 import { txOptsSchema } from '../schemas/tx_opts_schema';
 import {
@@ -20,7 +20,6 @@ import { constants } from '../utils/constants';
 
 import { ContractWrapper } from './contract_wrapper';
 import { ERC20ProxyWrapper } from './erc20_proxy_wrapper';
-import { ERC20TokenContract, ERC20TokenEventArgs, ERC20TokenEvents } from './generated/erc20_token';
 
 const removeUndefinedProperties = _.pickBy;
 
@@ -32,7 +31,7 @@ const removeUndefinedProperties = _.pickBy;
 export class ERC20TokenWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.ERC20Token.compilerOutput.abi;
     public UNLIMITED_ALLOWANCE_IN_BASE_UNITS = constants.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
-    private _tokenContractsByAddress: { [address: string]: ERC20TokenContract };
+    private _tokenContractsByAddress: { [address: string]: wrappers.ERC20TokenContract };
     private _erc20ProxyWrapper: ERC20ProxyWrapper;
     /**
      * Instantiate ERC20TokenWrapper
@@ -357,15 +356,15 @@ export class ERC20TokenWrapper extends ContractWrapper {
      * @param   isVerbose           Enable verbose subscription warnings (e.g recoverable network issues encountered)
      * @return Subscription token used later to unsubscribe
      */
-    public subscribe<ArgsType extends ERC20TokenEventArgs>(
+    public subscribe<ArgsType extends wrappers.ERC20TokenEventArgs>(
         tokenAddress: string,
-        eventName: ERC20TokenEvents,
+        eventName: wrappers.ERC20TokenEvents,
         indexFilterValues: IndexedFilterValues,
         callback: EventCallback<ArgsType>,
         isVerbose: boolean = false,
     ): string {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, ERC20TokenEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ERC20TokenEvents);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const normalizedTokenAddress = tokenAddress.toLowerCase();
@@ -402,14 +401,14 @@ export class ERC20TokenWrapper extends ContractWrapper {
      *                              the value is the value you are interested in. E.g `{_from: aUserAddressHex}`
      * @return  Array of logs that match the parameters
      */
-    public async getLogsAsync<ArgsType extends ERC20TokenEventArgs>(
+    public async getLogsAsync<ArgsType extends wrappers.ERC20TokenEventArgs>(
         tokenAddress: string,
-        eventName: ERC20TokenEvents,
+        eventName: wrappers.ERC20TokenEvents,
         blockRange: BlockRange,
         indexFilterValues: IndexedFilterValues,
     ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, ERC20TokenEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ERC20TokenEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const normalizedTokenAddress = tokenAddress.toLowerCase();
@@ -429,7 +428,7 @@ export class ERC20TokenWrapper extends ContractWrapper {
         this.unsubscribeAll();
         this._tokenContractsByAddress = {};
     }
-    private async _getTokenContractAsync(tokenAddress: string): Promise<ERC20TokenContract> {
+    private async _getTokenContractAsync(tokenAddress: string): Promise<wrappers.ERC20TokenContract> {
         const normalizedTokenAddress = tokenAddress.toLowerCase();
         let tokenContract = this._tokenContractsByAddress[normalizedTokenAddress];
         if (!_.isUndefined(tokenContract)) {
@@ -439,7 +438,7 @@ export class ERC20TokenWrapper extends ContractWrapper {
             artifacts.ERC20Token,
             normalizedTokenAddress,
         );
-        const contractInstance = new ERC20TokenContract(
+        const contractInstance = new wrappers.ERC20TokenContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
index 933c1dc27..6ba162213 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc721_proxy_wrapper.ts
@@ -1,20 +1,19 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { AssetProxyId } from '@0xproject/types';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { assert } from '../utils/assert';
 
 import { ContractWrapper } from './contract_wrapper';
-import { ERC721ProxyContract } from './generated/erc721_proxy';
 
 /**
  * This class includes the functionality related to interacting with the ERC721Proxy contract.
  */
 export class ERC721ProxyWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.ERC20Proxy.compilerOutput.abi;
-    private _erc721ProxyContractIfExists?: ERC721ProxyContract;
+    private _erc721ProxyContractIfExists?: wrappers.ERC721ProxyContract;
     private _contractAddressIfExists?: string;
     /**
      * Instantiate ERC721ProxyWrapper
@@ -72,7 +71,7 @@ export class ERC721ProxyWrapper extends ContractWrapper {
     private _invalidateContractInstance(): void {
         delete this._erc721ProxyContractIfExists;
     }
-    private async _getERC721ProxyContractAsync(): Promise<ERC721ProxyContract> {
+    private async _getERC721ProxyContractAsync(): Promise<wrappers.ERC721ProxyContract> {
         if (!_.isUndefined(this._erc721ProxyContractIfExists)) {
             return this._erc721ProxyContractIfExists;
         }
@@ -80,7 +79,7 @@ export class ERC721ProxyWrapper extends ContractWrapper {
             artifacts.ERC721Proxy,
             this._contractAddressIfExists,
         );
-        const contractInstance = new ERC721ProxyContract(
+        const contractInstance = new wrappers.ERC721ProxyContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/erc721_token_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/erc721_token_wrapper.ts
index 590dbbf74..23b335710 100644
--- a/packages/contract-wrappers/src/contract_wrappers/erc721_token_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/erc721_token_wrapper.ts
@@ -1,10 +1,10 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { methodOptsSchema } from '../schemas/method_opts_schema';
 import { txOptsSchema } from '../schemas/tx_opts_schema';
 import {
@@ -20,7 +20,6 @@ import { constants } from '../utils/constants';
 
 import { ContractWrapper } from './contract_wrapper';
 import { ERC721ProxyWrapper } from './erc721_proxy_wrapper';
-import { ERC721TokenContract, ERC721TokenEventArgs, ERC721TokenEvents } from './generated/erc721_token';
 
 const removeUndefinedProperties = _.pickBy;
 
@@ -31,7 +30,7 @@ const removeUndefinedProperties = _.pickBy;
  */
 export class ERC721TokenWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.ERC721Token.compilerOutput.abi;
-    private _tokenContractsByAddress: { [address: string]: ERC721TokenContract };
+    private _tokenContractsByAddress: { [address: string]: wrappers.ERC721TokenContract };
     private _erc721ProxyWrapper: ERC721ProxyWrapper;
     /**
      * Instantiate ERC721TokenWrapper
@@ -384,15 +383,15 @@ export class ERC721TokenWrapper extends ContractWrapper {
      * @param   isVerbose           Enable verbose subscription warnings (e.g recoverable network issues encountered)
      * @return Subscription token used later to unsubscribe
      */
-    public subscribe<ArgsType extends ERC721TokenEventArgs>(
+    public subscribe<ArgsType extends wrappers.ERC721TokenEventArgs>(
         tokenAddress: string,
-        eventName: ERC721TokenEvents,
+        eventName: wrappers.ERC721TokenEvents,
         indexFilterValues: IndexedFilterValues,
         callback: EventCallback<ArgsType>,
         isVerbose: boolean = false,
     ): string {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, ERC721TokenEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ERC721TokenEvents);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const normalizedTokenAddress = tokenAddress.toLowerCase();
@@ -429,14 +428,14 @@ export class ERC721TokenWrapper extends ContractWrapper {
      *                              the value is the value you are interested in. E.g `{_from: aUserAddressHex}`
      * @return  Array of logs that match the parameters
      */
-    public async getLogsAsync<ArgsType extends ERC721TokenEventArgs>(
+    public async getLogsAsync<ArgsType extends wrappers.ERC721TokenEventArgs>(
         tokenAddress: string,
-        eventName: ERC721TokenEvents,
+        eventName: wrappers.ERC721TokenEvents,
         blockRange: BlockRange,
         indexFilterValues: IndexedFilterValues,
     ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.isETHAddressHex('tokenAddress', tokenAddress);
-        assert.doesBelongToStringEnum('eventName', eventName, ERC721TokenEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ERC721TokenEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const normalizedTokenAddress = tokenAddress.toLowerCase();
@@ -456,7 +455,7 @@ export class ERC721TokenWrapper extends ContractWrapper {
         this.unsubscribeAll();
         this._tokenContractsByAddress = {};
     }
-    private async _getTokenContractAsync(tokenAddress: string): Promise<ERC721TokenContract> {
+    private async _getTokenContractAsync(tokenAddress: string): Promise<wrappers.ERC721TokenContract> {
         const normalizedTokenAddress = tokenAddress.toLowerCase();
         let tokenContract = this._tokenContractsByAddress[normalizedTokenAddress];
         if (!_.isUndefined(tokenContract)) {
@@ -466,7 +465,7 @@ export class ERC721TokenWrapper extends ContractWrapper {
             artifacts.ERC721Token,
             normalizedTokenAddress,
         );
-        const contractInstance = new ERC721TokenContract(
+        const contractInstance = new wrappers.ERC721TokenContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts
index 1ac01812e..30653adf2 100644
--- a/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/ether_token_wrapper.ts
@@ -1,16 +1,15 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { BlockRange, ContractWrappersError, EventCallback, IndexedFilterValues, TransactionOpts } from '../types';
 import { assert } from '../utils/assert';
 
 import { ContractWrapper } from './contract_wrapper';
 import { ERC20TokenWrapper } from './erc20_token_wrapper';
-import { WETH9Contract, WETH9EventArgs, WETH9Events } from './generated/weth9';
 
 const removeUndefinedProperties = _.pickBy;
 
@@ -19,9 +18,9 @@ const removeUndefinedProperties = _.pickBy;
  * The caller can convert ETH into the equivalent number of wrapped ETH ERC20 tokens and back.
  */
 export class EtherTokenWrapper extends ContractWrapper {
-    public abi: ContractAbi = artifacts.EtherToken.compilerOutput.abi;
+    public abi: ContractAbi = artifacts.WETH9.compilerOutput.abi;
     private _etherTokenContractsByAddress: {
-        [address: string]: WETH9Contract;
+        [address: string]: wrappers.WETH9Contract;
     } = {};
     private _erc20TokenWrapper: ERC20TokenWrapper;
     /**
@@ -126,15 +125,15 @@ export class EtherTokenWrapper extends ContractWrapper {
      *                              the value is the value you are interested in. E.g `{_owner: aUserAddressHex}`
      * @return  Array of logs that match the parameters
      */
-    public async getLogsAsync<ArgsType extends WETH9EventArgs>(
+    public async getLogsAsync<ArgsType extends wrappers.WETH9EventArgs>(
         etherTokenAddress: string,
-        eventName: WETH9Events,
+        eventName: wrappers.WETH9Events,
         blockRange: BlockRange,
         indexFilterValues: IndexedFilterValues,
     ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
         assert.isETHAddressHex('etherTokenAddress', etherTokenAddress);
         const normalizedEtherTokenAddress = etherTokenAddress.toLowerCase();
-        assert.doesBelongToStringEnum('eventName', eventName, WETH9Events);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.WETH9Events);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const logs = await this._getLogsAsync<ArgsType>(
@@ -142,7 +141,7 @@ export class EtherTokenWrapper extends ContractWrapper {
             eventName,
             blockRange,
             indexFilterValues,
-            artifacts.EtherToken.compilerOutput.abi,
+            artifacts.WETH9.compilerOutput.abi,
         );
         return logs;
     }
@@ -156,23 +155,23 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @param   isVerbose           Enable verbose subscription warnings (e.g recoverable network issues encountered)
      * @return Subscription token used later to unsubscribe
      */
-    public subscribe<ArgsType extends WETH9EventArgs>(
+    public subscribe<ArgsType extends wrappers.WETH9EventArgs>(
         etherTokenAddress: string,
-        eventName: WETH9Events,
+        eventName: wrappers.WETH9Events,
         indexFilterValues: IndexedFilterValues,
         callback: EventCallback<ArgsType>,
         isVerbose: boolean = false,
     ): string {
         assert.isETHAddressHex('etherTokenAddress', etherTokenAddress);
         const normalizedEtherTokenAddress = etherTokenAddress.toLowerCase();
-        assert.doesBelongToStringEnum('eventName', eventName, WETH9Events);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.WETH9Events);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const subscriptionToken = this._subscribe<ArgsType>(
             normalizedEtherTokenAddress,
             eventName,
             indexFilterValues,
-            artifacts.EtherToken.compilerOutput.abi,
+            artifacts.WETH9.compilerOutput.abi,
             callback,
             isVerbose,
         );
@@ -199,7 +198,7 @@ export class EtherTokenWrapper extends ContractWrapper {
      * @returns The Ethereum address of the EtherToken contract or undefined.
      */
     public getContractAddressIfExists(): string | undefined {
-        const networkSpecificArtifact = artifacts.EtherToken.networks[this._networkId];
+        const networkSpecificArtifact = artifacts.WETH9.networks[this._networkId];
         const contractAddressIfExists = _.isUndefined(networkSpecificArtifact)
             ? undefined
             : networkSpecificArtifact.address;
@@ -210,16 +209,16 @@ export class EtherTokenWrapper extends ContractWrapper {
         this.unsubscribeAll();
         this._etherTokenContractsByAddress = {};
     }
-    private async _getEtherTokenContractAsync(etherTokenAddress: string): Promise<WETH9Contract> {
+    private async _getEtherTokenContractAsync(etherTokenAddress: string): Promise<wrappers.WETH9Contract> {
         let etherTokenContract = this._etherTokenContractsByAddress[etherTokenAddress];
         if (!_.isUndefined(etherTokenContract)) {
             return etherTokenContract;
         }
         const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(
-            artifacts.EtherToken,
+            artifacts.WETH9,
             etherTokenAddress,
         );
-        const contractInstance = new WETH9Contract(
+        const contractInstance = new wrappers.WETH9Contract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
index dc9ffcbf7..613747720 100644
--- a/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts
@@ -1,3 +1,4 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import {
     assetDataUtils,
@@ -11,7 +12,6 @@ import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { BlockParamLiteral, ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { AssetBalanceAndProxyAllowanceFetcher } from '../fetchers/asset_balance_and_proxy_allowance_fetcher';
 import { OrderFilledCancelledFetcher } from '../fetchers/order_filled_cancelled_fetcher';
 import { methodOptsSchema } from '../schemas/method_opts_schema';
@@ -35,7 +35,6 @@ import { TransactionEncoder } from '../utils/transaction_encoder';
 import { ContractWrapper } from './contract_wrapper';
 import { ERC20TokenWrapper } from './erc20_token_wrapper';
 import { ERC721TokenWrapper } from './erc721_token_wrapper';
-import { ExchangeContract, ExchangeEventArgs, ExchangeEvents } from './generated/exchange';
 
 /**
  * This class includes all the functionality related to calling methods, sending transactions and subscribing to
@@ -43,7 +42,7 @@ import { ExchangeContract, ExchangeEventArgs, ExchangeEvents } from './generated
  */
 export class ExchangeWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.Exchange.compilerOutput.abi;
-    private _exchangeContractIfExists?: ExchangeContract;
+    private _exchangeContractIfExists?: wrappers.ExchangeContract;
     private _erc721TokenWrapper: ERC721TokenWrapper;
     private _erc20TokenWrapper: ERC20TokenWrapper;
     private _contractAddressIfExists?: string;
@@ -1042,13 +1041,13 @@ export class ExchangeWrapper extends ContractWrapper {
      * @param   isVerbose           Enable verbose subscription warnings (e.g recoverable network issues encountered)
      * @return Subscription token used later to unsubscribe
      */
-    public subscribe<ArgsType extends ExchangeEventArgs>(
-        eventName: ExchangeEvents,
+    public subscribe<ArgsType extends wrappers.ExchangeEventArgs>(
+        eventName: wrappers.ExchangeEvents,
         indexFilterValues: IndexedFilterValues,
         callback: EventCallback<ArgsType>,
         isVerbose: boolean = false,
     ): string {
-        assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ExchangeEvents);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         assert.isFunction('callback', callback);
         const exchangeContractAddress = this.getContractAddress();
@@ -1083,12 +1082,12 @@ export class ExchangeWrapper extends ContractWrapper {
      *                              the value is the value you are interested in. E.g `{_from: aUserAddressHex}`
      * @return  Array of logs that match the parameters
      */
-    public async getLogsAsync<ArgsType extends ExchangeEventArgs>(
-        eventName: ExchangeEvents,
+    public async getLogsAsync<ArgsType extends wrappers.ExchangeEventArgs>(
+        eventName: wrappers.ExchangeEvents,
         blockRange: BlockRange,
         indexFilterValues: IndexedFilterValues,
     ): Promise<Array<LogWithDecodedArgs<ArgsType>>> {
-        assert.doesBelongToStringEnum('eventName', eventName, ExchangeEvents);
+        assert.doesBelongToStringEnum('eventName', eventName, wrappers.ExchangeEvents);
         assert.doesConformToSchema('blockRange', blockRange, schemas.blockRangeSchema);
         assert.doesConformToSchema('indexFilterValues', indexFilterValues, schemas.indexFilterValuesSchema);
         const exchangeContractAddress = this.getContractAddress();
@@ -1201,7 +1200,7 @@ export class ExchangeWrapper extends ContractWrapper {
         delete this._exchangeContractIfExists;
     }
     // tslint:enable:no-unused-variable
-    private async _getExchangeContractAsync(): Promise<ExchangeContract> {
+    private async _getExchangeContractAsync(): Promise<wrappers.ExchangeContract> {
         if (!_.isUndefined(this._exchangeContractIfExists)) {
             return this._exchangeContractIfExists;
         }
@@ -1209,7 +1208,7 @@ export class ExchangeWrapper extends ContractWrapper {
             artifacts.Exchange,
             this._contractAddressIfExists,
         );
-        const contractInstance = new ExchangeContract(
+        const contractInstance = new wrappers.ExchangeContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/forwarder_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/forwarder_wrapper.ts
index c19edf188..854a8381b 100644
--- a/packages/contract-wrappers/src/contract_wrappers/forwarder_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/forwarder_wrapper.ts
@@ -1,3 +1,4 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import { AssetProxyId, SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
@@ -5,7 +6,6 @@ import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { orderTxOptsSchema } from '../schemas/order_tx_opts_schema';
 import { txOptsSchema } from '../schemas/tx_opts_schema';
 import { OrderTransactionOpts } from '../types';
@@ -16,14 +16,13 @@ import { decorators } from '../utils/decorators';
 import { utils } from '../utils/utils';
 
 import { ContractWrapper } from './contract_wrapper';
-import { ForwarderContract } from './generated/forwarder';
 
 /**
  * This class includes the functionality related to interacting with the Forwarder contract.
  */
 export class ForwarderWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.Forwarder.compilerOutput.abi;
-    private _forwarderContractIfExists?: ForwarderContract;
+    private _forwarderContractIfExists?: wrappers.ForwarderContract;
     private _contractAddressIfExists?: string;
     private _zrxContractAddressIfExists?: string;
     constructor(
@@ -242,7 +241,7 @@ export class ForwarderWrapper extends ContractWrapper {
      * @return Address of Ether token
      */
     public getEtherTokenAddress(): string {
-        const contractAddress = this._getContractAddress(artifacts.EtherToken);
+        const contractAddress = this._getContractAddress(artifacts.WETH9);
         return contractAddress;
     }
     // HACK: We don't want this method to be visible to the other units within that package but not to the end user.
@@ -251,7 +250,7 @@ export class ForwarderWrapper extends ContractWrapper {
     private _invalidateContractInstance(): void {
         delete this._forwarderContractIfExists;
     }
-    private async _getForwarderContractAsync(): Promise<ForwarderContract> {
+    private async _getForwarderContractAsync(): Promise<wrappers.ForwarderContract> {
         if (!_.isUndefined(this._forwarderContractIfExists)) {
             return this._forwarderContractIfExists;
         }
@@ -259,7 +258,7 @@ export class ForwarderWrapper extends ContractWrapper {
             artifacts.Forwarder,
             this._contractAddressIfExists,
         );
-        const contractInstance = new ForwarderContract(
+        const contractInstance = new wrappers.ForwarderContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/contract_wrappers/order_validator_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/order_validator_wrapper.ts
index 1da88f624..02f9dd4de 100644
--- a/packages/contract-wrappers/src/contract_wrappers/order_validator_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/order_validator_wrapper.ts
@@ -1,3 +1,4 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { schemas } from '@0xproject/json-schemas';
 import { SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
@@ -5,19 +6,17 @@ import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import { ContractAbi } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts } from '../artifacts';
 import { BalanceAndAllowance, OrderAndTraderInfo, TraderInfo } from '../types';
 import { assert } from '../utils/assert';
 
 import { ContractWrapper } from './contract_wrapper';
-import { OrderValidatorContract } from './generated/order_validator';
 
 /**
  * This class includes the functionality related to interacting with the OrderValidator contract.
  */
 export class OrderValidatorWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.OrderValidator.compilerOutput.abi;
-    private _orderValidatorContractIfExists?: OrderValidatorContract;
+    private _orderValidatorContractIfExists?: wrappers.OrderValidatorContract;
     /**
      * Instantiate OrderValidatorWrapper
      * @param web3Wrapper Web3Wrapper instance to use
@@ -170,12 +169,12 @@ export class OrderValidatorWrapper extends ContractWrapper {
     private _invalidateContractInstance(): void {
         delete this._orderValidatorContractIfExists;
     }
-    private async _getOrderValidatorContractAsync(): Promise<OrderValidatorContract> {
+    private async _getOrderValidatorContractAsync(): Promise<wrappers.OrderValidatorContract> {
         if (!_.isUndefined(this._orderValidatorContractIfExists)) {
             return this._orderValidatorContractIfExists;
         }
         const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(artifacts.OrderValidator);
-        const contractInstance = new OrderValidatorContract(
+        const contractInstance = new wrappers.OrderValidatorContract(
             abi,
             address,
             this._web3Wrapper.getProvider(),
diff --git a/packages/contract-wrappers/src/index.ts b/packages/contract-wrappers/src/index.ts
index e8a53170e..659394eb6 100644
--- a/packages/contract-wrappers/src/index.ts
+++ b/packages/contract-wrappers/src/index.ts
@@ -1,3 +1,5 @@
+import { wrappers } from '@0xproject/contracts';
+
 export { ContractWrappers } from './contract_wrappers';
 export { ERC20TokenWrapper } from './contract_wrappers/erc20_token_wrapper';
 export { ERC721TokenWrapper } from './contract_wrappers/erc721_token_wrapper';
@@ -54,39 +56,31 @@ export {
     StateMutability,
 } from 'ethereum-types';
 
-export {
-    WETH9Events,
-    WETH9WithdrawalEventArgs,
-    WETH9ApprovalEventArgs,
-    WETH9EventArgs,
-    WETH9DepositEventArgs,
-    WETH9TransferEventArgs,
-} from './contract_wrappers/generated/weth9';
+export const WETH9Events = wrappers.WETH9Events;
+export type WETH9WithdrawalEventArgs = wrappers.WETH9WithdrawalEventArgs;
+export type WETH9ApprovalEventArgs = wrappers.WETH9ApprovalEventArgs;
+export type WETH9EventArgs = wrappers.WETH9EventArgs;
+export type WETH9DepositEventArgs = wrappers.WETH9DepositEventArgs;
+export type WETH9TransferEventArgs = wrappers.WETH9TransferEventArgs;
 
-export {
-    ERC20TokenTransferEventArgs,
-    ERC20TokenApprovalEventArgs,
-    ERC20TokenEvents,
-    ERC20TokenEventArgs,
-} from './contract_wrappers/generated/erc20_token';
+export type ERC20TokenTransferEventArgs = wrappers.ERC20TokenTransferEventArgs;
+export type ERC20TokenApprovalEventArgs = wrappers.ERC20TokenApprovalEventArgs;
+export const ERC20TokenEvents = wrappers.ERC20TokenEvents;
+export type ERC20TokenEventArgs = wrappers.ERC20TokenEventArgs;
 
-export {
-    ERC721TokenApprovalEventArgs,
-    ERC721TokenApprovalForAllEventArgs,
-    ERC721TokenTransferEventArgs,
-    ERC721TokenEvents,
-    ERC721TokenEventArgs,
-} from './contract_wrappers/generated/erc721_token';
+export type ERC721TokenApprovalEventArgs = wrappers.ERC721TokenApprovalEventArgs;
+export type ERC721TokenApprovalForAllEventArgs = wrappers.ERC721TokenApprovalForAllEventArgs;
+export type ERC721TokenTransferEventArgs = wrappers.ERC721TokenTransferEventArgs;
+export const ERC721TokenEvents = wrappers.ERC721TokenEvents;
+export type ERC721TokenEventArgs = wrappers.ERC721TokenEventArgs;
 
-export {
-    ExchangeCancelUpToEventArgs,
-    ExchangeAssetProxyRegisteredEventArgs,
-    ExchangeSignatureValidatorApprovalEventArgs,
-    ExchangeFillEventArgs,
-    ExchangeCancelEventArgs,
-    ExchangeEventArgs,
-    ExchangeEvents,
-} from './contract_wrappers/generated/exchange';
+export type ExchangeCancelUpToEventArgs = wrappers.ExchangeCancelUpToEventArgs;
+export type ExchangeAssetProxyRegisteredEventArgs = wrappers.ExchangeAssetProxyRegisteredEventArgs;
+export type ExchangeSignatureValidatorApprovalEventArgs = wrappers.ExchangeSignatureValidatorApprovalEventArgs;
+export type ExchangeFillEventArgs = wrappers.ExchangeFillEventArgs;
+export type ExchangeCancelEventArgs = wrappers.ExchangeCancelEventArgs;
+export type ExchangeEventArgs = wrappers.ExchangeEventArgs;
+export const ExchangeEvents = wrappers.ExchangeEvents;
 
 export { AbstractBalanceAndProxyAllowanceFetcher, AbstractOrderFilledCancelledFetcher } from '@0xproject/order-utils';
 
diff --git a/packages/contract-wrappers/src/types.ts b/packages/contract-wrappers/src/types.ts
index e0b12b7c9..0ac5f05e4 100644
--- a/packages/contract-wrappers/src/types.ts
+++ b/packages/contract-wrappers/src/types.ts
@@ -1,13 +1,9 @@
+import { wrappers } from '@0xproject/contracts';
 import { BigNumber } from '@0xproject/utils';
 
 import { OrderState, SignedOrder } from '@0xproject/types';
 import { BlockParam, ContractEventArg, DecodedLogArgs, LogEntryEvent, LogWithDecodedArgs } from 'ethereum-types';
 
-import { ERC20TokenEventArgs, ERC20TokenEvents } from './contract_wrappers/generated/erc20_token';
-import { ERC721TokenEventArgs, ERC721TokenEvents } from './contract_wrappers/generated/erc721_token';
-import { ExchangeEventArgs, ExchangeEvents } from './contract_wrappers/generated/exchange';
-import { WETH9EventArgs, WETH9Events } from './contract_wrappers/generated/weth9';
-
 export enum ExchangeWrapperError {
     AssetDataMismatch = 'ASSET_DATA_MISMATCH',
 }
@@ -60,7 +56,11 @@ export interface ContractEvent {
     args: ContractEventArgs;
 }
 
-export type ContractEventArgs = ExchangeEventArgs | ERC20TokenEventArgs | ERC721TokenEventArgs | WETH9EventArgs;
+export type ContractEventArgs =
+    | wrappers.ExchangeEventArgs
+    | wrappers.ERC20TokenEventArgs
+    | wrappers.ERC721TokenEventArgs
+    | wrappers.WETH9EventArgs;
 
 //                          [address, name, symbol, decimals, ipfsHash, swarmHash]
 export type TokenMetadata = [string, string, string, number, string, string];
@@ -83,7 +83,11 @@ export interface TokenAddressBySymbol {
     [symbol: string]: string;
 }
 
-export type ContractEvents = ERC20TokenEvents | ERC721TokenEvents | ExchangeEvents | WETH9Events;
+export type ContractEvents =
+    | wrappers.ERC20TokenEvents
+    | wrappers.ERC721TokenEvents
+    | wrappers.ExchangeEvents
+    | wrappers.WETH9Events;
 
 export interface IndexedFilterValues {
     [index: string]: ContractEventArg;
diff --git a/packages/contract-wrappers/src/utils/transaction_encoder.ts b/packages/contract-wrappers/src/utils/transaction_encoder.ts
index 33086944b..f4c6de97f 100644
--- a/packages/contract-wrappers/src/utils/transaction_encoder.ts
+++ b/packages/contract-wrappers/src/utils/transaction_encoder.ts
@@ -1,11 +1,11 @@
+import { wrappers } from '@0xproject/contracts';
+
 import { schemas } from '@0xproject/json-schemas';
 import { eip712Utils } from '@0xproject/order-utils';
 import { Order, SignedOrder } from '@0xproject/types';
 import { BigNumber, signTypedDataUtils } from '@0xproject/utils';
 import _ = require('lodash');
 
-import { ExchangeContract } from '../contract_wrappers/generated/exchange';
-
 import { assert } from './assert';
 
 /**
@@ -14,8 +14,8 @@ import { assert } from './assert';
  * can submit this to the blockchain. The Exchange context executes as if UserA had directly submitted this transaction.
  */
 export class TransactionEncoder {
-    private readonly _exchangeInstance: ExchangeContract;
-    constructor(exchangeInstance: ExchangeContract) {
+    private readonly _exchangeInstance: wrappers.ExchangeContract;
+    constructor(exchangeInstance: wrappers.ExchangeContract) {
         this._exchangeInstance = exchangeInstance;
     }
     /**
@@ -275,7 +275,7 @@ export class TransactionEncoder {
         );
         return abiEncodedData;
     }
-    private _getExchangeContract(): ExchangeContract {
+    private _getExchangeContract(): wrappers.ExchangeContract {
         return this._exchangeInstance;
     }
 }
diff --git a/packages/contract-wrappers/test/utils/token_utils.ts b/packages/contract-wrappers/test/utils/token_utils.ts
index 06a82ff6e..0a35b4107 100644
--- a/packages/contract-wrappers/test/utils/token_utils.ts
+++ b/packages/contract-wrappers/test/utils/token_utils.ts
@@ -1,9 +1,7 @@
+import { artifacts, wrappers } from '@0xproject/contracts';
 import { generatePseudoRandomSalt } from '@0xproject/order-utils';
 import { BigNumber } from '@0xproject/utils';
 
-import { artifacts } from '../../src/artifacts';
-import { DummyERC721TokenContract } from '../../src/contract_wrappers/generated/dummy_erc721_token';
-
 import { constants } from './constants';
 import { provider, txDefaults, web3Wrapper } from './web3_wrapper';
 
@@ -24,7 +22,7 @@ export const tokenUtils = {
         return artifacts.ZRXToken.networks[constants.TESTRPC_NETWORK_ID].address;
     },
     getWethTokenAddress(): string {
-        return artifacts.EtherToken.networks[constants.TESTRPC_NETWORK_ID].address;
+        return artifacts.WETH9.networks[constants.TESTRPC_NETWORK_ID].address;
     },
     getDummyERC20TokenAddresses(): string[] {
         return DUMMY_ERC_20_ADRESSES;
@@ -33,7 +31,7 @@ export const tokenUtils = {
         return DUMMY_ERC_721_ADRESSES;
     },
     async mintDummyERC721Async(address: string, tokenOwner: string): Promise<BigNumber> {
-        const erc721 = new DummyERC721TokenContract(
+        const erc721 = new wrappers.DummyERC721TokenContract(
             artifacts.DummyERC721Token.compilerOutput.abi,
             address,
             provider,