7 files changed, 72 insertions, 13 deletions
diff --git a/packages/contracts/contract_templates/contract.handlebars b/packages/contracts/contract_templates/contract.handlebars
index afb9708e9..84b0696b1 100644
--- a/packages/contracts/contract_templates/contract.handlebars
+++ b/packages/contracts/contract_templates/contract.handlebars
@@ -10,6 +10,24 @@ 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}}
diff --git a/packages/contracts/contract_templates/partials/event.handlebars b/packages/contracts/contract_templates/partials/event.handlebars
new file mode 100644
index 000000000..3c6100e4f
--- /dev/null
+++ b/packages/contracts/contract_templates/partials/event.handlebars
@@ -0,0 +1,5 @@
+export interface {{name}}ContractEventArgs {
+    {{#each inputs}}
+    {{name}}: {{#returnType type components}}{{/returnType}};
+    {{/each}}
+}
diff --git a/packages/contracts/globals.d.ts b/packages/contracts/globals.d.ts
index 0e6586a4b..fe39fb11d 100644
--- a/packages/contracts/globals.d.ts
+++ b/packages/contracts/globals.d.ts
@@ -32,3 +32,31 @@ declare module 'ethereumjs-abi' {
     const soliditySHA3: (argTypes: string[], args: any[]) => Buffer;
     const methodID: (name: string, types: string[]) => Buffer;
 }
+
+declare module 'ethers-contracts' {
+    export interface TransactionDescription {
+        name: string;
+        signature: string;
+        sighash: string;
+        data: string;
+    }
+    export interface CallDescription extends TransactionDescription {
+        parse: (...args: any[]) => any;
+    }
+    export interface FunctionDescription {
+        (...params: any[]): TransactionDescription | CallDescription;
+        inputs: { names: string[]; types: string[] };
+        outputs: { names: string[]; types: string[] };
+    }
+    export interface EventDescription {
+        inputs: { names: string[]; types: string[] };
+        signature: string;
+        topic: string;
+    }
+    // tslint:disable-next-line:max-classes-per-file
+    export class Interface {
+        public functions: { [functionName: string]: FunctionDescription };
+        public events: { [eventName: string]: EventDescription };
+        constructor(abi: any);
+    }
+}
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index 0a3a6fc84..f35ba73c2 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",
+        "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",
         "migrate": "node ../deployer/lib/src/cli.js migrate",
         "lint": "tslint --project . 'migrations/**/*.ts' 'test/**/*.ts' 'util/**/*.ts' 'deploy/**/*.ts'",
         "test:circleci": "yarn test"
@@ -72,6 +72,7 @@
         "bn.js": "^4.11.8",
         "ethereumjs-abi": "^0.6.4",
         "ethereumjs-util": "^5.1.1",
+        "ethers-contracts": "^2.2.1",
         "isomorphic-fetch": "^2.2.1",
         "lodash": "^4.17.4",
         "request": "^2.81.0",
diff --git a/packages/contracts/test/exchange/core.ts b/packages/contracts/test/exchange/core.ts
index 9cfc68418..1997a1f11 100644
--- a/packages/contracts/test/exchange/core.ts
+++ b/packages/contracts/test/exchange/core.ts
@@ -1,12 +1,4 @@
-import {
-    LogCancelContractEventArgs,
-    LogErrorContractEventArgs,
-    LogFillContractEventArgs,
-    LogWithDecodedArgs,
-    SignedOrder,
-    TransactionReceiptWithDecodedLogs,
-    ZeroEx,
-} from '0x.js';
+import { LogWithDecodedArgs, SignedOrder, TransactionReceiptWithDecodedLogs, ZeroEx } from '0x.js';
 import { BlockchainLifecycle, devConstants, web3Factory } from '@0xproject/dev-utils';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
@@ -15,7 +7,12 @@ import ethUtil = require('ethereumjs-util');
 import * as Web3 from 'web3';
 
 import { DummyTokenContract } from '../../src/contract_wrappers/generated/dummy_token';
-import { ExchangeContract } from '../../src/contract_wrappers/generated/exchange';
+import {
+    ExchangeContract,
+    LogCancelContractEventArgs,
+    LogErrorContractEventArgs,
+    LogFillContractEventArgs,
+} from '../../src/contract_wrappers/generated/exchange';
 import { TokenTransferProxyContract } from '../../src/contract_wrappers/generated/token_transfer_proxy';
 import { Balances } from '../../util/balances';
 import { constants } from '../../util/constants';
diff --git a/packages/contracts/test/exchange/helpers.ts b/packages/contracts/test/exchange/helpers.ts
index 5fe00225e..9030af4c6 100644
--- a/packages/contracts/test/exchange/helpers.ts
+++ b/packages/contracts/test/exchange/helpers.ts
@@ -5,7 +5,12 @@ import { Web3Wrapper } from '@0xproject/web3-wrapper';
 import * as chai from 'chai';
 import ethUtil = require('ethereumjs-util');
 
-import { ExchangeContract } from '../../src/contract_wrappers/generated/exchange';
+import {
+    ExchangeContract,
+    LogCancelContractEventArgs,
+    LogErrorContractEventArgs,
+    LogFillContractEventArgs,
+} from '../../src/contract_wrappers/generated/exchange';
 import { constants } from '../../util/constants';
 import { ExchangeWrapper } from '../../util/exchange_wrapper';
 import { OrderFactory } from '../../util/order_factory';
diff --git a/packages/contracts/test/exchange/wrapper.ts b/packages/contracts/test/exchange/wrapper.ts
index bf5a89222..5b1b76deb 100644
--- a/packages/contracts/test/exchange/wrapper.ts
+++ b/packages/contracts/test/exchange/wrapper.ts
@@ -7,7 +7,12 @@ import * as _ from 'lodash';
 import * as Web3 from 'web3';
 
 import { DummyTokenContract } from '../../src/contract_wrappers/generated/dummy_token';
-import { ExchangeContract } from '../../src/contract_wrappers/generated/exchange';
+import {
+    ExchangeContract,
+    LogCancelContractEventArgs,
+    LogErrorContractEventArgs,
+    LogFillContractEventArgs,
+} from '../../src/contract_wrappers/generated/exchange';
 import { TokenRegistryContract } from '../../src/contract_wrappers/generated/token_registry';
 import { TokenTransferProxyContract } from '../../src/contract_wrappers/generated/token_transfer_proxy';
 import { Balances } from '../../util/balances';