Use the same templates as 0x.js

30 files changed, 178 insertions, 184 deletions

diff --git a/packages/0x.js/package.json b/packages/0x.js/package.json
index 78cba529a..0ea60fde8 100644
--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -17,7 +17,7 @@
         "build": "run-p build:umd:prod build:commonjs; exit 0;",
         "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_DIR",
         "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",
-        "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/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 report_test_coverage",
         "test": "run-s clean test:commonjs",
diff --git a/packages/0x.js/contract_templates/contract.handlebars b/packages/contract_templates/contract.handlebars
index 2954145a7..2954145a7 100644
--- a/packages/0x.js/contract_templates/contract.handlebars
+++ b/packages/contract_templates/contract.handlebars
diff --git a/packages/0x.js/contract_templates/partials/call.handlebars b/packages/contract_templates/partials/call.handlebars
index c533712b7..7ac3e1ee3 100644
--- a/packages/0x.js/contract_templates/partials/call.handlebars
+++ b/packages/contract_templates/partials/call.handlebars
@@ -4,7 +4,7 @@ public {{this.name}} = {
         defaultBlock?: Web3.BlockParam,
     ): Promise<{{> return_type outputs=outputs}}> {
         const self = this as {{contractName}}Contract;
-        const inputAbi = _.find(this._abi, {name: '{{this.name}}'}).inputs;
+        const inputAbi = _.find(this.abi, {name: '{{this.name}}'}).inputs;
         [{{> params inputs=inputs}}] = BaseContract._transformABIData(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString.bind(this));
         const callDescription = self._ethersInterface.functions.{{this.name}}(
             {{> params inputs=inputs}}
@@ -16,7 +16,7 @@ public {{this.name}} = {
         )
         const rawCallResult = await self._web3Wrapper.callAsync(callData);
         let resultArray = callDescription.parse(rawCallResult);
-        const outputAbi = _.find(this._abi, {name: '{{this.name}}'}).outputs;
+        const outputAbi = _.find(this.abi, {name: '{{this.name}}'}).outputs;
         resultArray = BaseContract._transformABIData(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
         return resultArray{{#singleReturnValue}}[0]{{/singleReturnValue}};
     },
diff --git a/packages/0x.js/contract_templates/partials/event.handlebars b/packages/contract_templates/partials/event.handlebars
index 3c6100e4f..3c6100e4f 100644
--- a/packages/0x.js/contract_templates/partials/event.handlebars
+++ b/packages/contract_templates/partials/event.handlebars
diff --git a/packages/0x.js/contract_templates/partials/params.handlebars b/packages/contract_templates/partials/params.handlebars
index ac5d4ae85..ac5d4ae85 100644
--- a/packages/0x.js/contract_templates/partials/params.handlebars
+++ b/packages/contract_templates/partials/params.handlebars
diff --git a/packages/0x.js/contract_templates/partials/return_type.handlebars b/packages/contract_templates/partials/return_type.handlebars
index 268ad15f7..9dd509953 100644
--- a/packages/0x.js/contract_templates/partials/return_type.handlebars
+++ b/packages/contract_templates/partials/return_type.handlebars
@@ -1,6 +1,10 @@
+{{#if outputs.length}}
 {{#singleReturnValue}}
-{{#returnType outputs.0.type outputs.0.components}}{{/returnType}}
+{{#returnType outputs.0.type components}}{{/returnType}}
 {{/singleReturnValue}}
 {{^singleReturnValue}}
 [{{#each outputs}}{{#returnType type components}}{{/returnType}}{{#unless @last}}, {{/unless}}{{/each}}]
 {{/singleReturnValue}}
+{{else}}
+void
+{{/if}}
diff --git a/packages/0x.js/contract_templates/partials/tx.handlebars b/packages/contract_templates/partials/tx.handlebars
index aae9aa404..5026dac20 100644
--- a/packages/0x.js/contract_templates/partials/tx.handlebars
+++ b/packages/contract_templates/partials/tx.handlebars
@@ -9,15 +9,15 @@ public {{this.name}} = {
     {{/this.payable}}
     ): Promise<string> {
         const self = this as {{contractName}}Contract;
-        const inputAbi = _.find(this._abi, {name: '{{this.name}}'}).inputs;
+        const inputAbi = _.find(this.abi, {name: '{{this.name}}'}).inputs;
         [{{> params inputs=inputs}}] = BaseContract._transformABIData(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString.bind(this));
-        const data = this._ethersInterface.functions.{{this.name}}(
+        const encodedData = this._ethersInterface.functions.{{this.name}}(
             {{> params inputs=inputs}}
         ).data
         const txDataWithDefaults = await self._applyDefaultsToTxDataAsync(
             {
                 ...txData,
-                data,
+                data: encodedData,
             },
             self.{{this.name}}.estimateGasAsync.bind(
                 self,
@@ -32,13 +32,13 @@ public {{this.name}} = {
         txData: TxData = {},
     ): Promise<number> {
         const self = this as {{contractName}}Contract;
-        const data = this._ethersInterface.functions.{{this.name}}(
+        const encodedData = this._ethersInterface.functions.{{this.name}}(
             {{> params inputs=inputs}}
         ).data
         const txDataWithDefaults = await self._applyDefaultsToTxDataAsync(
             {
                 ...txData,
-                data,
+                data: encodedData,
             }
         );
         const gas = await this._web3Wrapper.estimateGasAsync(txDataWithDefaults);
@@ -54,4 +54,30 @@ public {{this.name}} = {
         ).data
         return abiEncodedTransactionData;
     },
+    async callAsync(
+    {{> typed_params inputs=inputs}}
+    {{#this.payable}}
+        txData: TxDataPayable = {},
+    {{/this.payable}}
+    {{^this.payable}}
+        txData: TxData = {},
+    {{/this.payable}}
+    ): Promise<{{> return_type outputs=outputs}}> {
+        const self = this as {{contractName}}Contract;
+        const inputAbi = _.find(this.abi, {name: '{{this.name}}'}).inputs;
+        [{{> params inputs=inputs}}] = BaseContract._transformABIData(inputAbi, [{{> params inputs=inputs}}], BaseContract._bigNumberToString.bind(this));
+        const callDescription = self._ethersInterface.functions.{{this.name}}(
+            {{> params inputs=inputs}}
+        ) as ethersContracts.CallDescription;
+        const callData = await self._applyDefaultsToTxDataAsync(
+            {
+                data: callDescription.data,
+            }
+        )
+        const rawCallResult = await self._web3Wrapper.callAsync(callData);
+        let resultArray = callDescription.parse(rawCallResult);
+        const outputAbi = _.find(this.abi, {name: '{{this.name}}'}).outputs;
+        resultArray = BaseContract._transformABIData(outputAbi, resultArray, BaseContract._lowercaseAddress.bind(this));
+        return resultArray{{#singleReturnValue}}[0]{{/singleReturnValue}};
+    },
 };
diff --git a/packages/0x.js/contract_templates/partials/typed_params.handlebars b/packages/contract_templates/partials/typed_params.handlebars
index c100e58f7..c100e58f7 100644
--- a/packages/0x.js/contract_templates/partials/typed_params.handlebars
+++ b/packages/contract_templates/partials/typed_params.handlebars
diff --git a/packages/contracts/contract_templates/contract.handlebars b/packages/contracts/contract_templates/contract.handlebars
deleted file mode 100644
index 84b0696b1..000000000
--- a/packages/contracts/contract_templates/contract.handlebars
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * This file is auto-generated using abi-gen. Don't edit directly.
- * Templates can be found at https://github.com/0xProject/0x.js/tree/development/packages/abi-gen-templates.
- */
-// tslint:disable:async-suffix member-ordering no-consecutive-blank-lines
-// tslint:disable-next-line:no-unused-variable
-import { TxData, TxDataPayable } from '@0xproject/types';
-import { BigNumber, classUtils, promisify } from '@0xproject/utils';
-import * as Web3 from 'web3';
-
-import {BaseContract} from './base_contract';
-
-{{#if events}}
-export type {{contractName}}ContractEventArgs =
-{{#each events}}
-    | {{name}}ContractEventArgs{{#if @last}};{{/if}}
-{{/each}}
-
-export enum {{contractName}}Events {
-    {{#each events}}
-    {{name}} = '{{name}}',
-    {{/each}}
-}
-
-{{#each events}}
-{{> event}}
-
-{{/each}}
-{{/if}}
-
-export class {{contractName}}Contract extends BaseContract {
-{{#each methods}}
-    {{#this.constant}}
-    {{> call contractName=../contractName}}
-    {{/this.constant}}
-    {{^this.constant}}
-    {{> tx contractName=../contractName}}
-    {{/this.constant}}
-{{/each}}
-    constructor(web3ContractInstance: Web3.ContractInstance, defaults?: Partial<TxData>) {
-        super(web3ContractInstance, defaults);
-        classUtils.bindAll(this, ['_web3ContractInstance', '_defaults']);
-    }
-} // tslint:disable:max-file-line-count
diff --git a/packages/contracts/contract_templates/partials/call.handlebars b/packages/contracts/contract_templates/partials/call.handlebars
deleted file mode 100644
index 82a45b40e..000000000
--- a/packages/contracts/contract_templates/partials/call.handlebars
+++ /dev/null
@@ -1,10 +0,0 @@
-public async {{this.name}}(
-{{> typed_params inputs=inputs}}
-    defaultBlock?: Web3.BlockParam,
-): Promise<{{> return_type outputs=outputs}}> {
-    const self = this as {{contractName}}Contract;
-    const result = await self._web3ContractInstance.{{this.name}}.call(
-        {{> params inputs=inputs}}
-    );
-    return result;
-}
diff --git a/packages/contracts/contract_templates/partials/event.handlebars b/packages/contracts/contract_templates/partials/event.handlebars
deleted file mode 100644
index 3c6100e4f..000000000
--- a/packages/contracts/contract_templates/partials/event.handlebars
+++ /dev/null
@@ -1,5 +0,0 @@
-export interface {{name}}ContractEventArgs {
-    {{#each inputs}}
-    {{name}}: {{#returnType type components}}{{/returnType}};
-    {{/each}}
-}
diff --git a/packages/contracts/contract_templates/partials/params.handlebars b/packages/contracts/contract_templates/partials/params.handlebars
deleted file mode 100644
index ac5d4ae85..000000000
--- a/packages/contracts/contract_templates/partials/params.handlebars
+++ /dev/null
@@ -1,3 +0,0 @@
-{{#each inputs}}
-{{name}},
-{{/each}}
diff --git a/packages/contracts/contract_templates/partials/return_type.handlebars b/packages/contracts/contract_templates/partials/return_type.handlebars
deleted file mode 100644
index 40a5dd8b0..000000000
--- a/packages/contracts/contract_templates/partials/return_type.handlebars
+++ /dev/null
@@ -1,10 +0,0 @@
-{{#if outputs.length}}
-{{#singleReturnValue}}
-{{#returnType outputs.0.type}}{{/returnType}}
-{{/singleReturnValue}}
-{{^singleReturnValue}}
-[{{#each outputs}}{{#returnType type}}{{/returnType}}{{#unless @last}}, {{/unless}}{{/each}}]
-{{/singleReturnValue}}
-{{else}}
-void
-{{/if}}
diff --git a/packages/contracts/contract_templates/partials/tx.handlebars b/packages/contracts/contract_templates/partials/tx.handlebars
deleted file mode 100644
index 69ae982d6..000000000
--- a/packages/contracts/contract_templates/partials/tx.handlebars
+++ /dev/null
@@ -1,36 +0,0 @@
-public {{this.name}} = {
-    async sendTransactionAsync(
-    {{> typed_params inputs=inputs}}
-    {{#this.payable}}
-        txData: TxDataPayable = {},
-    {{/this.payable}}
-    {{^this.payable}}
-        txData: TxData = {},
-    {{/this.payable}}
-    ): Promise<string> {
-        const self = this as {{contractName}}Contract;
-        const txDataWithDefaults = await self._applyDefaultsToTxDataAsync(txData);
-        const txHash = await self._web3ContractInstance.{{this.name}}(
-            {{> params inputs=inputs}}
-            txDataWithDefaults,
-        );
-        return txHash;
-    },
-    async callAsync(
-    {{> typed_params inputs=inputs}}
-    {{#this.payable}}
-        txData: TxDataPayable = {},
-    {{/this.payable}}
-    {{^this.payable}}
-        txData: TxData = {},
-    {{/this.payable}}
-    ): Promise<{{> return_type outputs=outputs}}> {
-        const self = this as {{contractName}}Contract;
-        const txDataWithDefaults = await self._applyDefaultsToTxDataAsync(txData);
-        const returnValue = await self._web3ContractInstance.{{this.name}}.call(
-            {{> params inputs=inputs}}
-            txDataWithDefaults,
-        );
-        return returnValue;
-    },
-};
diff --git a/packages/contracts/contract_templates/partials/typed_params.handlebars b/packages/contracts/contract_templates/partials/typed_params.handlebars
deleted file mode 100644
index c100e58f7..000000000
--- a/packages/contracts/contract_templates/partials/typed_params.handlebars
+++ /dev/null
@@ -1,3 +0,0 @@
-{{#each inputs}}
-    {{name}}: {{#parameterType type components}}{{/parameterType}},
-{{/each}}
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index ddd8ade55..f41d7786d 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -17,7 +17,7 @@
         "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} --contracts-dir src/contracts --artifacts-dir src/artifacts",
         "clean": "shx rm -rf ./lib",
-        "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'src/artifacts/@(DummyToken|TokenTransferProxy|Exchange|TokenRegistry|MultiSigWallet|MultiSigWalletWithTimeLock|MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress|TokenRegistry|ZRXToken).json' --template contract_templates/contract.handlebars --partials 'contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend web3 && prettier --write 'src/contract_wrappers/generated/**.ts'",
+        "generate_contract_wrappers": "node ../abi-gen/lib/index.js --abis 'src/artifacts/@(DummyToken|TokenTransferProxy|Exchange|TokenRegistry|MultiSigWallet|MultiSigWalletWithTimeLock|MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress|TokenRegistry|ZRXToken).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend web3 && prettier --write 'src/contract_wrappers/generated/**.ts'",
         "migrate": "node ../deployer/lib/src/cli.js migrate",
         "lint": "tslint --project . 'migrations/**/*.ts' 'test/**/*.ts' 'util/**/*.ts' 'deploy/**/*.ts'",
         "test:circleci": "yarn test"
diff --git a/packages/contracts/src/contract_wrappers/generated/base_contract.ts b/packages/contracts/src/contract_wrappers/generated/base_contract.ts
index d492bd325..a465ddc38 100644
--- a/packages/contracts/src/contract_wrappers/generated/base_contract.ts
+++ b/packages/contracts/src/contract_wrappers/generated/base_contract.ts
@@ -1,12 +1,45 @@
 import { TxData, TxDataPayable } from '@0xproject/types';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import * as ethersContracts from 'ethers-contracts';
 import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
 export class BaseContract {
+    protected _ethersInterface: ethersContracts.Interface;
+    protected _web3Wrapper: Web3Wrapper;
+    public abi: Web3.ContractAbi;
     public address: string;
-    protected _web3ContractInstance: Web3.ContractInstance;
-    protected _defaults: Partial<TxData>;
-    protected async _applyDefaultsToTxDataAsync<T extends TxData | TxDataPayable>(
+    protected static _transformABIData(
+        abis: Web3.DataItem[],
+        values: any[],
+        transformation: (type: string, value: any) => any,
+    ): any {
+        return _.map(values, (value: any, i: number) =>
+            BaseContract._transformTypedData(abis[i].type, value, transformation),
+        );
+    }
+    protected static _lowercaseAddress(type: string, value: string): string {
+        return type === 'address' ? value.toLowerCase() : value;
+    }
+    protected static _bigNumberToString(type: string, value: string): string {
+        return _.isObject(value) && (value as any).isBigNumber ? value.toString() : value;
+    }
+    private static _transformTypedData(
+        type: string,
+        values: any,
+        transformation: (type: string, value: any) => any,
+    ): any {
+        const trailingArrayRegex = /\[\d*\]$/;
+        if (type.match(trailingArrayRegex)) {
+            const arrayItemType = type.replace(trailingArrayRegex, '');
+            return _.map(values, (value: any, i: number) =>
+                this._transformTypedData(arrayItemType, value, transformation),
+            );
+        } else {
+            return transformation(type, values);
+        }
+    }
+    protected async _applyDefaultsToTxDataAsync<T extends Partial<TxData | TxDataPayable>>(
         txData: T,
         estimateGasAsync?: (txData: T) => Promise<number>,
     ): Promise<TxData> {
@@ -16,7 +49,8 @@ export class BaseContract {
         // 3. Gas estimate calculation + safety margin
         const removeUndefinedProperties = _.pickBy;
         const txDataWithDefaults = {
-            ...removeUndefinedProperties(this._defaults),
+            to: this.address,
+            ...removeUndefinedProperties(this._web3Wrapper.getContractDefaults()),
             ...removeUndefinedProperties(txData as any),
             // HACK: TS can't prove that T is spreadable.
             // Awaiting https://github.com/Microsoft/TypeScript/pull/13288 to be merged
@@ -27,9 +61,10 @@ export class BaseContract {
         }
         return txDataWithDefaults;
     }
-    constructor(web3ContractInstance: Web3.ContractInstance, defaults?: Partial<TxData>) {
-        this.address = web3ContractInstance.address;
-        this._web3ContractInstance = web3ContractInstance;
-        this._defaults = defaults || {};
+    constructor(web3Wrapper: Web3Wrapper, abi: Web3.ContractAbi, address: string) {
+        this._web3Wrapper = web3Wrapper;
+        this.abi = abi;
+        this.address = address;
+        this._ethersInterface = new ethersContracts.Interface(abi);
     }
 }
diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index 1997a1f11..7d191aa99 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -60,16 +60,20 @@ describe('Exchange', () => {
             deployer.deployAsync(ContractName.DummyToken),
             deployer.deployAsync(ContractName.DummyToken),
         ]);
-        rep = new DummyTokenContract(repInstance);
-        dgd = new DummyTokenContract(dgdInstance);
-        zrx = new DummyTokenContract(zrxInstance);
+        rep = new DummyTokenContract(web3Wrapper, repInstance.abi, repInstance.address);
+        dgd = new DummyTokenContract(web3Wrapper, dgdInstance.abi, dgdInstance.address);
+        zrx = new DummyTokenContract(web3Wrapper, zrxInstance.abi, zrxInstance.address);
         const tokenTransferProxyInstance = await deployer.deployAsync(ContractName.TokenTransferProxy);
-        tokenTransferProxy = new TokenTransferProxyContract(tokenTransferProxyInstance);
+        tokenTransferProxy = new TokenTransferProxyContract(
+            web3Wrapper,
+            tokenTransferProxyInstance.abi,
+            tokenTransferProxyInstance.address,
+        );
         const exchangeInstance = await deployer.deployAsync(ContractName.Exchange, [
             zrx.address,
             tokenTransferProxy.address,
         ]);
-        exchange = new ExchangeContract(exchangeInstance);
+        exchange = new ExchangeContract(web3Wrapper, exchangeInstance.abi, exchangeInstance.address);
         await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: accounts[0] });
         zeroEx = new ZeroEx(web3.currentProvider, {
             exchangeContractAddress: exchange.address,
@@ -647,7 +651,7 @@ describe('Exchange', () => {
 
         it('should not change balances if makerTokenAddress is ZRX, makerTokenAmount + makerFee > maker allowance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
-            const makerZRXAllowance = await zrx.allowance(maker, tokenTransferProxy.address);
+            const makerZRXAllowance = await zrx.allowance.callAsync(maker, tokenTransferProxy.address);
             signedOrder = await orderFactory.newSignedOrderAsync({
                 makerTokenAddress: zrx.address,
                 makerTokenAmount: new BigNumber(makerZRXAllowance),
@@ -673,7 +677,7 @@ describe('Exchange', () => {
 
         it('should not change balances if takerTokenAddress is ZRX, takerTokenAmount + takerFee > taker allowance, \
                 and shouldThrowOnInsufficientBalanceOrAllowance = false', async () => {
-            const takerZRXAllowance = await zrx.allowance(taker, tokenTransferProxy.address);
+            const takerZRXAllowance = await zrx.allowance.callAsync(taker, tokenTransferProxy.address);
             signedOrder = await orderFactory.newSignedOrderAsync({
                 takerTokenAddress: zrx.address,
                 takerTokenAmount: new BigNumber(takerZRXAllowance),
diff --git a/packages/contracts/test/exchange/helpers.ts b/packages/contracts/test/exchange/helpers.ts
index 9030af4c6..497193e8b 100644
--- a/packages/contracts/test/exchange/helpers.ts
+++ b/packages/contracts/test/exchange/helpers.ts
@@ -47,7 +47,7 @@ describe('Exchange', () => {
             zrx.address,
             tokenTransferProxy.address,
         ]);
-        const exchange = new ExchangeContract(exchangeInstance);
+        const exchange = new ExchangeContract(web3Wrapper, exchangeInstance.abi, exchangeInstance.address);
         await tokenTransferProxy.addAuthorizedAddress(exchange.address, { from: accounts[0] });
         const zeroEx = new ZeroEx(web3.currentProvider, { networkId: constants.TESTRPC_NETWORK_ID });
         exchangeWrapper = new ExchangeWrapper(exchange, zeroEx);
diff --git a/packages/contracts/test/exchange/wrapper.ts b/packages/contracts/test/exchange/wrapper.ts
index 5b1b76deb..4ea40cb59 100644
--- a/packages/contracts/test/exchange/wrapper.ts
+++ b/packages/contracts/test/exchange/wrapper.ts
@@ -60,18 +60,26 @@ describe('Exchange', () => {
             deployer.deployAsync(ContractName.DummyToken),
             deployer.deployAsync(ContractName.DummyToken),
         ]);
-        rep = new DummyTokenContract(repInstance);
-        dgd = new DummyTokenContract(dgdInstance);
-        zrx = new DummyTokenContract(zrxInstance);
+        rep = new DummyTokenContract(web3Wrapper, repInstance.abi, repInstance.address);
+        dgd = new DummyTokenContract(web3Wrapper, dgdInstance.abi, dgdInstance.address);
+        zrx = new DummyTokenContract(web3Wrapper, zrxInstance.abi, zrxInstance.address);
         const tokenRegistryInstance = await deployer.deployAsync(ContractName.TokenRegistry);
-        tokenRegistry = new TokenRegistryContract(tokenRegistryInstance);
+        tokenRegistry = new TokenRegistryContract(
+            web3Wrapper,
+            tokenRegistryInstance.abi,
+            tokenRegistryInstance.address,
+        );
         const tokenTransferProxyInstance = await deployer.deployAsync(ContractName.TokenTransferProxy);
-        tokenTransferProxy = new TokenTransferProxyContract(tokenTransferProxyInstance);
+        tokenTransferProxy = new TokenTransferProxyContract(
+            web3Wrapper,
+            tokenTransferProxyInstance.abi,
+            tokenTransferProxyInstance.address,
+        );
         const exchangeInstance = await deployer.deployAsync(ContractName.Exchange, [
             zrx.address,
             tokenTransferProxy.address,
         ]);
-        exchange = new ExchangeContract(exchangeInstance);
+        exchange = new ExchangeContract(web3Wrapper, exchangeInstance.abi, exchangeInstance.address);
         await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: accounts[0] });
         const zeroEx = new ZeroEx(web3.currentProvider, { networkId: constants.TESTRPC_NETWORK_ID });
         exWrapper = new ExchangeWrapper(exchange, zeroEx);
diff --git a/packages/contracts/test/multi_sig_with_time_lock.ts b/packages/contracts/test/multi_sig_with_time_lock.ts
index 6812cb09f..a726814e4 100644
--- a/packages/contracts/test/multi_sig_with_time_lock.ts
+++ b/packages/contracts/test/multi_sig_with_time_lock.ts
@@ -59,10 +59,14 @@ describe('MultiSigWalletWithTimeLock', () => {
                     SIGNATURES_REQUIRED,
                     0,
                 ]);
-                multiSig = new MultiSigWalletWithTimeLockContract(multiSigInstance);
+                multiSig = new MultiSigWalletWithTimeLockContract(
+                    web3Wrapper,
+                    multiSigInstance.abi,
+                    multiSigInstance.address,
+                );
                 multiSigWrapper = new MultiSigWrapper((multiSig as any) as MultiSigWalletContract);
 
-                const secondsTimeLocked = await multiSig.secondsTimeLocked();
+                const secondsTimeLocked = await multiSig.secondsTimeLocked.callAsync();
                 initialSecondsTimeLocked = secondsTimeLocked.toNumber();
             });
             it('should throw when not called by wallet', async () => {
@@ -113,7 +117,7 @@ describe('MultiSigWalletWithTimeLock', () => {
                 const blockNum = await web3Wrapper.getBlockNumberAsync();
                 const blockInfo = await web3Wrapper.getBlockAsync(blockNum);
                 const timestamp = new BigNumber(blockInfo.timestamp);
-                const confirmationTimeBigNum = new BigNumber(await multiSig.confirmationTimes(txId));
+                const confirmationTimeBigNum = new BigNumber(await multiSig.confirmationTimes.callAsync(txId));
 
                 expect(timestamp).to.be.bignumber.equal(confirmationTimeBigNum);
             });
@@ -141,7 +145,7 @@ describe('MultiSigWalletWithTimeLock', () => {
                 const res = await zeroEx.awaitTransactionMinedAsync(txHash);
                 expect(res.logs).to.have.length(2);
 
-                const secondsTimeLocked = new BigNumber(await multiSig.secondsTimeLocked());
+                const secondsTimeLocked = new BigNumber(await multiSig.secondsTimeLocked.callAsync());
                 expect(secondsTimeLocked).to.be.bignumber.equal(SECONDS_TIME_LOCKED);
             });
         });
@@ -152,10 +156,14 @@ describe('MultiSigWalletWithTimeLock', () => {
                     SIGNATURES_REQUIRED,
                     SECONDS_TIME_LOCKED,
                 ]);
-                multiSig = new MultiSigWalletWithTimeLockContract(multiSigInstance);
+                multiSig = new MultiSigWalletWithTimeLockContract(
+                    web3Wrapper,
+                    multiSigInstance.abi,
+                    multiSigInstance.address,
+                );
                 multiSigWrapper = new MultiSigWrapper((multiSig as any) as MultiSigWalletContract);
 
-                const secondsTimeLocked = await multiSig.secondsTimeLocked();
+                const secondsTimeLocked = await multiSig.secondsTimeLocked.callAsync();
                 initialSecondsTimeLocked = secondsTimeLocked.toNumber();
                 const destination = multiSig.address;
                 const from = owners[0];
@@ -187,7 +195,7 @@ describe('MultiSigWalletWithTimeLock', () => {
                 await rpc.increaseTimeAsync(SECONDS_TIME_LOCKED.toNumber());
                 await multiSig.executeTransaction.sendTransactionAsync(txId, { from: owners[0] });
 
-                const secondsTimeLocked = new BigNumber(await multiSig.secondsTimeLocked());
+                const secondsTimeLocked = new BigNumber(await multiSig.secondsTimeLocked.callAsync());
                 expect(secondsTimeLocked).to.be.bignumber.equal(newSecondsTimeLocked);
             });
         });
diff --git a/packages/contracts/test/multi_sig_with_time_lock_except_remove_auth_addr.ts b/packages/contracts/test/multi_sig_with_time_lock_except_remove_auth_addr.ts
index 7e9d44730..c0299e1e1 100644
--- a/packages/contracts/test/multi_sig_with_time_lock_except_remove_auth_addr.ts
+++ b/packages/contracts/test/multi_sig_with_time_lock_except_remove_auth_addr.ts
@@ -49,7 +49,11 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
         [authorizedAddress, unauthorizedAddress] = accounts;
         const initialOwner = accounts[0];
         const tokenTransferProxyInstance = await deployer.deployAsync(ContractName.TokenTransferProxy);
-        tokenTransferProxy = new TokenTransferProxyContract(tokenTransferProxyInstance);
+        tokenTransferProxy = new TokenTransferProxyContract(
+            web3Wrapper,
+            tokenTransferProxyInstance.abi,
+            tokenTransferProxyInstance.address,
+        );
         await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(authorizedAddress, {
             from: initialOwner,
         });
@@ -57,7 +61,11 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
             ContractName.MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress,
             [owners, requiredApprovals, SECONDS_TIME_LOCKED, tokenTransferProxy.address],
         );
-        multiSig = new MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddressContract(multiSigInstance);
+        multiSig = new MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddressContract(
+            web3Wrapper,
+            multiSigInstance.abi,
+            multiSigInstance.address,
+        );
         await tokenTransferProxy.transferOwnership.sendTransactionAsync(multiSig.address, {
             from: initialOwner,
         });
@@ -74,12 +82,14 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
     describe('isFunctionRemoveAuthorizedAddress', () => {
         it('should throw if data is not for removeAuthorizedAddress', async () => {
             const data = MultiSigWrapper.encodeFnArgs('addAuthorizedAddress', PROXY_ABI, [owners[0]]);
-            return expect(multiSig.isFunctionRemoveAuthorizedAddress(data)).to.be.rejectedWith(constants.REVERT);
+            return expect(multiSig.isFunctionRemoveAuthorizedAddress.callAsync(data)).to.be.rejectedWith(
+                constants.REVERT,
+            );
         });
 
         it('should return true if data is for removeAuthorizedAddress', async () => {
             const data = MultiSigWrapper.encodeFnArgs('removeAuthorizedAddress', PROXY_ABI, [owners[0]]);
-            const isFunctionRemoveAuthorizedAddress = await multiSig.isFunctionRemoveAuthorizedAddress(data);
+            const isFunctionRemoveAuthorizedAddress = await multiSig.isFunctionRemoveAuthorizedAddress.callAsync(data);
             expect(isFunctionRemoveAuthorizedAddress).to.be.true();
         });
     });
@@ -114,7 +124,7 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
             const log = abiDecoder.tryToDecodeLogOrNoop(res.logs[0]) as LogWithDecodedArgs<SubmissionContractEventArgs>;
             const txId = log.args.transactionId;
             await multiSig.confirmTransaction.sendTransactionAsync(txId, { from: owners[1] });
-            const isConfirmed = await multiSig.isConfirmed(txId);
+            const isConfirmed = await multiSig.isConfirmed.callAsync(txId);
             expect(isConfirmed).to.be.true();
 
             return expect(
@@ -133,7 +143,7 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
             const log = abiDecoder.tryToDecodeLogOrNoop(res.logs[0]) as LogWithDecodedArgs<SubmissionContractEventArgs>;
             const txId = log.args.transactionId;
             await multiSig.confirmTransaction.sendTransactionAsync(txId, { from: owners[1] });
-            const isConfirmed = await multiSig.isConfirmed(txId);
+            const isConfirmed = await multiSig.isConfirmed.callAsync(txId);
             expect(isConfirmed).to.be.true();
 
             return expect(
@@ -152,10 +162,10 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
             const log = abiDecoder.tryToDecodeLogOrNoop(res.logs[0]) as LogWithDecodedArgs<SubmissionContractEventArgs>;
             const txId = log.args.transactionId;
             await multiSig.confirmTransaction.sendTransactionAsync(txId, { from: owners[1] });
-            const isConfirmed = await multiSig.isConfirmed(txId);
+            const isConfirmed = await multiSig.isConfirmed.callAsync(txId);
             expect(isConfirmed).to.be.true();
             await multiSig.executeRemoveAuthorizedAddress.sendTransactionAsync(txId, { from: owners[1] });
-            const isAuthorized = await tokenTransferProxy.authorized(authorizedAddress);
+            const isAuthorized = await tokenTransferProxy.authorized.callAsync(authorizedAddress);
             expect(isAuthorized).to.be.false();
         });
 
@@ -170,10 +180,10 @@ describe('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', () => {
             const log = abiDecoder.tryToDecodeLogOrNoop(res.logs[0]) as LogWithDecodedArgs<SubmissionContractEventArgs>;
             const txId = log.args.transactionId;
             await multiSig.confirmTransaction.sendTransactionAsync(txId, { from: owners[1] });
-            const isConfirmed = await multiSig.isConfirmed(txId);
+            const isConfirmed = await multiSig.isConfirmed.callAsync(txId);
             expect(isConfirmed).to.be.true();
             await multiSig.executeRemoveAuthorizedAddress.sendTransactionAsync(txId, { from: owners[1] });
-            const tx = await multiSig.transactions(txId);
+            const tx = await multiSig.transactions.callAsync(txId);
             const isExecuted = tx[3];
             expect(isExecuted).to.be.true();
             return expect(
diff --git a/packages/contracts/test/token_registry.ts b/packages/contracts/test/token_registry.ts
index 867282d2c..eee14ad9f 100644
--- a/packages/contracts/test/token_registry.ts
+++ b/packages/contracts/test/token_registry.ts
@@ -31,7 +31,7 @@ describe('TokenRegistry', () => {
         owner = accounts[0];
         notOwner = accounts[1];
         const tokenRegInstance = await deployer.deployAsync(ContractName.TokenRegistry);
-        tokenReg = new TokenRegistryContract(tokenRegInstance);
+        tokenReg = new TokenRegistryContract(web3Wrapper, tokenRegInstance.abi, tokenRegInstance.address);
         tokenRegWrapper = new TokenRegWrapper(tokenReg);
     });
     beforeEach(async () => {
diff --git a/packages/contracts/test/token_transfer_proxy/auth.ts b/packages/contracts/test/token_transfer_proxy/auth.ts
index 9d453b079..4f497dd0d 100644
--- a/packages/contracts/test/token_transfer_proxy/auth.ts
+++ b/packages/contracts/test/token_transfer_proxy/auth.ts
@@ -25,7 +25,11 @@ describe('TokenTransferProxy', () => {
         owner = address = accounts[0];
         notOwner = accounts[1];
         const tokenTransferProxyInstance = await deployer.deployAsync(ContractName.TokenTransferProxy);
-        tokenTransferProxy = new TokenTransferProxyContract(tokenTransferProxyInstance);
+        tokenTransferProxy = new TokenTransferProxyContract(
+            web3Wrapper,
+            tokenTransferProxyInstance.abi,
+            tokenTransferProxyInstance.address,
+        );
     });
     beforeEach(async () => {
         await blockchainLifecycle.startAsync();
@@ -41,7 +45,7 @@ describe('TokenTransferProxy', () => {
         });
         it('should allow owner to add an authorized address', async () => {
             await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(address, { from: owner });
-            const isAuthorized = await tokenTransferProxy.authorized(address);
+            const isAuthorized = await tokenTransferProxy.authorized.callAsync(address);
             expect(isAuthorized).to.be.true();
         });
         it('should throw if owner attempts to authorize a duplicate address', async () => {
@@ -67,7 +71,7 @@ describe('TokenTransferProxy', () => {
             await tokenTransferProxy.removeAuthorizedAddress.sendTransactionAsync(address, {
                 from: owner,
             });
-            const isAuthorized = await tokenTransferProxy.authorized(address);
+            const isAuthorized = await tokenTransferProxy.authorized.callAsync(address);
             expect(isAuthorized).to.be.false();
         });
 
@@ -82,19 +86,19 @@ describe('TokenTransferProxy', () => {
 
     describe('getAuthorizedAddresses', () => {
         it('should return all authorized addresses', async () => {
-            const initial = await tokenTransferProxy.getAuthorizedAddresses();
+            const initial = await tokenTransferProxy.getAuthorizedAddresses.callAsync();
             expect(initial).to.have.length(0);
             await tokenTransferProxy.addAuthorizedAddress.sendTransactionAsync(address, {
                 from: owner,
             });
-            const afterAdd = await tokenTransferProxy.getAuthorizedAddresses();
+            const afterAdd = await tokenTransferProxy.getAuthorizedAddresses.callAsync();
             expect(afterAdd).to.have.length(1);
             expect(afterAdd).to.include(address);
 
             await tokenTransferProxy.removeAuthorizedAddress.sendTransactionAsync(address, {
                 from: owner,
             });
-            const afterRemove = await tokenTransferProxy.getAuthorizedAddresses();
+            const afterRemove = await tokenTransferProxy.getAuthorizedAddresses.callAsync();
             expect(afterRemove).to.have.length(0);
         });
     });
diff --git a/packages/contracts/test/token_transfer_proxy/transfer_from.ts b/packages/contracts/test/token_transfer_proxy/transfer_from.ts
index c35a7276a..6b86a0e97 100644
--- a/packages/contracts/test/token_transfer_proxy/transfer_from.ts
+++ b/packages/contracts/test/token_transfer_proxy/transfer_from.ts
@@ -33,9 +33,13 @@ describe('TokenTransferProxy', () => {
         accounts = await web3Wrapper.getAvailableAddressesAsync();
         owner = notAuthorized = accounts[0];
         const tokenTransferProxyInstance = await deployer.deployAsync(ContractName.TokenTransferProxy);
-        tokenTransferProxy = new TokenTransferProxyContract(tokenTransferProxyInstance);
+        tokenTransferProxy = new TokenTransferProxyContract(
+            web3Wrapper,
+            tokenTransferProxyInstance.abi,
+            tokenTransferProxyInstance.address,
+        );
         const repInstance = await deployer.deployAsync(ContractName.DummyToken);
-        rep = new DummyTokenContract(repInstance);
+        rep = new DummyTokenContract(web3Wrapper, repInstance.abi, repInstance.address);
 
         dmyBalances = new Balances([rep], [accounts[0], accounts[1]]);
         await Promise.all([
diff --git a/packages/contracts/test/unlimited_allowance_token.ts b/packages/contracts/test/unlimited_allowance_token.ts
index f0a66e76b..03eb581ad 100644
--- a/packages/contracts/test/unlimited_allowance_token.ts
+++ b/packages/contracts/test/unlimited_allowance_token.ts
@@ -35,7 +35,7 @@ describe('UnlimitedAllowanceToken', () => {
         owner = accounts[0];
         spender = accounts[1];
         const tokenInstance = await deployer.deployAsync(ContractName.DummyToken);
-        token = new DummyTokenContract(tokenInstance);
+        token = new DummyTokenContract(web3Wrapper, tokenInstance.abi, tokenInstance.address);
         await token.mint.sendTransactionAsync(MAX_MINT_VALUE, { from: owner });
         tokenAddress = token.address;
     });
diff --git a/packages/contracts/test/zrx_token.ts b/packages/contracts/test/zrx_token.ts
index 1610ada12..4ccc66b36 100644
--- a/packages/contracts/test/zrx_token.ts
+++ b/packages/contracts/test/zrx_token.ts
@@ -36,7 +36,7 @@ describe('ZRXToken', () => {
             networkId: constants.TESTRPC_NETWORK_ID,
         });
         const zrxInstance = await deployer.deployAsync(ContractName.ZRXToken);
-        zrx = new ZRXTokenContract(zrxInstance);
+        zrx = new ZRXTokenContract(web3Wrapper, zrxInstance.abi, zrxInstance.address);
         zrxAddress = zrx.address;
         MAX_UINT = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
     });
@@ -48,25 +48,25 @@ describe('ZRXToken', () => {
     });
     describe('constants', () => {
         it('should have 18 decimals', async () => {
-            const decimals = new BigNumber(await zrx.decimals());
+            const decimals = new BigNumber(await zrx.decimals.callAsync());
             const expectedDecimals = 18;
             expect(decimals).to.be.bignumber.equal(expectedDecimals);
         });
 
         it('should have a total supply of 1 billion tokens', async () => {
-            const totalSupply = new BigNumber(await zrx.totalSupply());
+            const totalSupply = new BigNumber(await zrx.totalSupply.callAsync());
             const expectedTotalSupply = 1000000000;
             expect(ZeroEx.toUnitAmount(totalSupply, 18)).to.be.bignumber.equal(expectedTotalSupply);
         });
 
         it('should be named 0x Protocol Token', async () => {
-            const name = await zrx.name();
+            const name = await zrx.name.callAsync();
             const expectedName = '0x Protocol Token';
             expect(name).to.be.equal(expectedName);
         });
 
         it('should have the symbol ZRX', async () => {
-            const symbol = await zrx.symbol();
+            const symbol = await zrx.symbol.callAsync();
             const expectedSymbol = 'ZRX';
             expect(symbol).to.be.equal(expectedSymbol);
         });
@@ -75,7 +75,7 @@ describe('ZRXToken', () => {
     describe('constructor', () => {
         it('should initialize owner balance to totalSupply', async () => {
             const ownerBalance = await zeroEx.token.getBalanceAsync(zrxAddress, owner);
-            const totalSupply = new BigNumber(await zrx.totalSupply());
+            const totalSupply = new BigNumber(await zrx.totalSupply.callAsync());
             expect(totalSupply).to.be.bignumber.equal(ownerBalance);
         });
     });
diff --git a/packages/contracts/util/balances.ts b/packages/contracts/util/balances.ts
index 0abc305d8..d03d4b3c5 100644
--- a/packages/contracts/util/balances.ts
+++ b/packages/contracts/util/balances.ts
@@ -17,7 +17,7 @@ export class Balances {
         const balancesByOwner: BalancesByOwner = {};
         for (const tokenContractInstance of this._tokenContractInstances) {
             for (const ownerAddress of this._ownerAddresses) {
-                let balance = await tokenContractInstance.balanceOf(ownerAddress);
+                let balance = await tokenContractInstance.balanceOf.callAsync(ownerAddress);
                 balance = new BigNumber(balance);
                 if (_.isUndefined(balancesByOwner[ownerAddress])) {
                     balancesByOwner[ownerAddress] = {};
diff --git a/packages/contracts/util/exchange_wrapper.ts b/packages/contracts/util/exchange_wrapper.ts
index 03d04629d..f016067fe 100644
--- a/packages/contracts/util/exchange_wrapper.ts
+++ b/packages/contracts/util/exchange_wrapper.ts
@@ -186,11 +186,11 @@ export class ExchangeWrapper {
     public async getOrderHashAsync(signedOrder: SignedOrder): Promise<string> {
         const shouldThrowOnInsufficientBalanceOrAllowance = false;
         const params = signedOrderUtils.getOrderAddressesAndValues(signedOrder);
-        const orderHash = await this._exchange.getOrderHash(params.orderAddresses, params.orderValues);
+        const orderHash = await this._exchange.getOrderHash.callAsync(params.orderAddresses, params.orderValues);
         return orderHash;
     }
     public async isValidSignatureAsync(signedOrder: SignedOrder): Promise<boolean> {
-        const isValidSignature = await this._exchange.isValidSignature(
+        const isValidSignature = await this._exchange.isValidSignature.callAsync(
             signedOrder.maker,
             ZeroEx.getOrderHashHex(signedOrder),
             signedOrder.ecSignature.v,
@@ -204,7 +204,7 @@ export class ExchangeWrapper {
         denominator: BigNumber,
         target: BigNumber,
     ): Promise<boolean> {
-        const isRoundingError = await this._exchange.isRoundingError(numerator, denominator, target);
+        const isRoundingError = await this._exchange.isRoundingError.callAsync(numerator, denominator, target);
         return isRoundingError;
     }
     public async getPartialAmountAsync(
@@ -212,7 +212,9 @@ export class ExchangeWrapper {
         denominator: BigNumber,
         target: BigNumber,
     ): Promise<BigNumber> {
-        const partialAmount = new BigNumber(await this._exchange.getPartialAmount(numerator, denominator, target));
+        const partialAmount = new BigNumber(
+            await this._exchange.getPartialAmount.callAsync(numerator, denominator, target),
+        );
         return partialAmount;
     }
 }
diff --git a/packages/contracts/util/token_registry_wrapper.ts b/packages/contracts/util/token_registry_wrapper.ts
index d0af17103..ba0fe8af0 100644
--- a/packages/contracts/util/token_registry_wrapper.ts
+++ b/packages/contracts/util/token_registry_wrapper.ts
@@ -22,7 +22,7 @@ export class TokenRegWrapper {
         return tx;
     }
     public async getTokenMetaDataAsync(tokenAddress: string) {
-        const data = await this._tokenReg.getTokenMetaData(tokenAddress);
+        const data = await this._tokenReg.getTokenMetaData.callAsync(tokenAddress);
         const token: Token = {
             address: data[0],
             name: data[1],
@@ -34,7 +34,7 @@ export class TokenRegWrapper {
         return token;
     }
     public async getTokenByNameAsync(tokenName: string) {
-        const data = await this._tokenReg.getTokenByName(tokenName);
+        const data = await this._tokenReg.getTokenByName.callAsync(tokenName);
         const token: Token = {
             address: data[0],
             name: data[1],
@@ -46,7 +46,7 @@ export class TokenRegWrapper {
         return token;
     }
     public async getTokenBySymbolAsync(tokenSymbol: string) {
-        const data = await this._tokenReg.getTokenBySymbol(tokenSymbol);
+        const data = await this._tokenReg.getTokenBySymbol.callAsync(tokenSymbol);
         const token: Token = {
             address: data[0],
             name: data[1],