Publish

- 0x.js@6.0.1
 - @0x/abi-gen@2.0.5
 - @0x/abi-gen-wrappers@4.0.1
 - @0x/assert@2.0.5
 - @0x/asset-buyer@6.0.1
 - @0x/base-contract@5.0.1
 - @0x/connect@5.0.1
 - @0x/contract-wrappers@8.0.1
 - @0x/contracts-gen@1.0.4
 - @0x/dev-tools-pages@0.0.21
 - @0x/dev-utils@2.1.2
 - @0x/fill-scenarios@3.0.1
 - @0x/instant@1.0.15
 - @0x/json-schemas@3.0.5
 - @0x/metacoin@0.0.42
 - @0x/migrations@4.0.1
 - @0x/monorepo-scripts@1.0.26
 - @0x/order-utils@7.0.1
 - @0x/order-watcher@4.0.1
 - @0x/pipeline@1.0.12
 - @0x/react-docs@2.0.6
 - @0x/react-shared@2.0.6
 - @0x/sol-compiler@3.1.1
 - @0x/sol-coverage@2.0.5
 - @0x/sol-doc@2.0.5
 - @0x/sol-profiler@3.1.0
 - @0x/sol-resolver@2.0.4
 - @0x/sol-trace@2.0.6
 - @0x/sol-tracing-utils@6.0.5
 - @0x/sra-spec@2.0.5
 - @0x/subproviders@4.0.1
 - @0x/testnet-faucets@1.0.71
 - @0x/types@2.1.1
 - @0x/utils@4.2.1
 - @0x/web3-wrapper@6.0.1
 - @0x/website@0.0.74
 - @0x/contracts-asset-proxy@1.0.7
 - @0x/contracts-erc20@1.0.7
 - @0x/contracts-erc721@1.0.7
 - @0x/contracts-exchange@1.0.7
 - @0x/contracts-exchange-forwarder@1.0.7
 - @0x/contracts-exchange-libs@1.1.1
 - @0x/contracts-extensions@2.0.6
 - @0x/contracts-multisig@2.0.6
 - @0x/contracts-tec@0.0.2
 - @0x/contracts-test-utils@3.0.6
 - @0x/contracts-utils@2.0.6

.circleci/config.yml

@@ -51,6 +51,7 @@ jobs:
             - run: yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: yarn wsrun test:circleci @0x/contracts-exchange
             - run: yarn wsrun test:circleci @0x/contracts-exchange-forwarder
+            - run: yarn wsrun test:circleci @0x/contracts-tec
     test-contracts-geth:
         docker:
             - image: circleci/node:9-browsers
@@ -71,6 +72,7 @@ jobs:
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-exchange
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-exchange-forwarder
+            - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-tec
     test-publish:
         resource_class: medium+
         docker:

.gitignore

@@ -83,6 +83,7 @@ packages/react-docs/example/public/bundle*
 packages/testnet-faucets/server/
 
 # generated contract artifacts/
+contracts/tec/generated-artifacts/
 contracts/exchange/generated-artifacts/
 contracts/asset-proxy/generated-artifacts/
 contracts/multisig/generated-artifacts/
@@ -97,6 +98,7 @@ packages/metacoin/artifacts/
 
 # generated contract wrappers
 packages/abi-gen-wrappers/wrappers
+contracts/tec/generated-wrappers/
 contracts/exchange/generated-wrappers/
 contracts/asset-proxy/generated-wrappers/
 contracts/multisig/generated-wrappers/

.prettierignore

@@ -1,5 +1,7 @@
 lib
 .nyc_output
+/contracts/tec/generated-wrappers
+/contracts/tec/generated-artifacts
 /contracts/exchange/generated-wrappers
 /contracts/exchange/generated-artifacts
 /contracts/asset-proxy/generated-wrappers

README.md

@@ -41,11 +41,12 @@ Visit our [developer portal](https://0xproject.com/docs/order-utils) for a compr
 | [`@0x/contracts-erc721`](/contracts/erc721)                         | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc721.svg)](https://www.npmjs.com/package/@0x/contracts-erc721)                         | Implementations of various ERC721 tokens                                                                                                                                                                                                              |
 | [`@0x/contracts-exchange`](/contracts/exchange)                     | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange.svg)](https://www.npmjs.com/package/@0x/contracts-exchange)                     | The [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract used for settling trades within the protocol                                                                            |
 | [`@0x/contracts-exchange-forwarder`](/contracts/exchange-forwarder) | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-forwarder.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder) | A [`Forwarder`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract used to simplify UX for interacting with the protocol                                                                      |
-| [`@0x/contracts-exchange-libs`](/contracts/exchange-libs)           | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-libs.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-libs)           | Protocol specific Llbraries used within the [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract                                                                                 |
+| [`@0x/contracts-exchange-libs`](/contracts/exchange-libs)           | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-libs.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-libs)           | Protocol specific libraries used within the [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract                                                                                 |
 | [`@0x/contracts-extensions`](/contracts/extensions)                 | [![npm](https://img.shields.io/npm/v/@0x/contracts-extensions.svg)](https://www.npmjs.com/package/@0x/contracts-extensions)                 | Contracts that interact with and extend the functionality of the core protocol                                                                                                                                                                        |
 | [`@0x/contracts-multisig`](/contracts/multisig)                     | [![npm](https://img.shields.io/npm/v/@0x/contracts-multisig.svg)](https://www.npmjs.com/package/@0x/contracts-multisig)                     | Various implementations of multisignature wallets, including the [`AssetProxyOwner`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxyowner) contract that has permissions to upgrade the protocol |
 | [`@0x/contracts-test-utils`](/contracts/test-utils)                 | [![npm](https://img.shields.io/npm/v/@0x/contracts-test-utils.svg)](https://www.npmjs.com/package/@0x/contracts-test-utils)                 | Typescript/Javascript shared utilities used for testing contracts                                                                                                                                                                                     |
 | [`@0x/contracts-utils`](/contracts/utils)                           | [![npm](https://img.shields.io/npm/v/@0x/contracts-utils.svg)](https://www.npmjs.com/package/@0x/contracts-utils)                           | Generic libraries and utilities used throughout all of the contracts                                                                                                                                                                                  |
+| [`@0x/contracts-tec`](/contracts/tec)                               | [![npm](https://img.shields.io/npm/v/@0x/contracts-tec.svg)](https://www.npmjs.com/package/@0x/contracts-tec)                               | A contract that allows users to execute 0x transactions with permission from a TEC (Trade Execution Coordinator)                                                                                                                                      |
 
 ### Typescript/Javascript Packages
 

contracts/asset-proxy/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/asset-proxy/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/asset-proxy/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/asset-proxy/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-asset-proxy",
-    "version": "1.0.4",
+    "version": "1.0.7",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,10 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -66,17 +67,16 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-erc20": "1.0.2",
-        "@0x/contracts-erc721": "1.0.2",
-        "@0x/contracts-test-utils": "^3.0.3",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-erc721": "^1.0.7",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/order-utils": "^6.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/asset-proxy/test/utils/erc20_wrapper.ts

@@ -2,7 +2,7 @@ import { constants, ERC20BalancesByOwner, txDefaults } from '@0x/contracts-test-
 import { assetDataUtils } from '@0x/order-utils';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
+import { ZeroExProvider } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { artifacts, DummyERC20TokenContract, ERC20ProxyContract } from '../../src';
@@ -11,7 +11,7 @@ export class ERC20Wrapper {
     private readonly _tokenOwnerAddresses: string[];
     private readonly _contractOwnerAddress: string;
     private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
+    private readonly _provider: ZeroExProvider;
     private readonly _dummyTokenContracts: DummyERC20TokenContract[];
     private _proxyContract?: ERC20ProxyContract;
     private _proxyIdIfExists?: string;
@@ -22,7 +22,7 @@ export class ERC20Wrapper {
      * @param contractOwnerAddress Desired owner of the contract
      * Instance of ERC20Wrapper
      */
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
+    constructor(provider: ZeroExProvider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
         this._dummyTokenContracts = [];
         this._web3Wrapper = new Web3Wrapper(provider);
         this._provider = provider;

contracts/asset-proxy/test/utils/erc721_wrapper.ts

@@ -2,7 +2,7 @@ import { constants, ERC721TokenIdsByOwner, txDefaults } from '@0x/contracts-test
 import { generatePseudoRandomSalt } from '@0x/order-utils';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
+import { ZeroExProvider } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { artifacts, DummyERC721TokenContract, ERC721ProxyContract } from '../../src';
@@ -11,12 +11,12 @@ export class ERC721Wrapper {
     private readonly _tokenOwnerAddresses: string[];
     private readonly _contractOwnerAddress: string;
     private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
+    private readonly _provider: ZeroExProvider;
     private readonly _dummyTokenContracts: DummyERC721TokenContract[];
     private _proxyContract?: ERC721ProxyContract;
     private _proxyIdIfExists?: string;
     private _initialTokenIdsByOwner: ERC721TokenIdsByOwner = {};
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
+    constructor(provider: ZeroExProvider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
         this._web3Wrapper = new Web3Wrapper(provider);
         this._provider = provider;
         this._dummyTokenContracts = [];

contracts/erc20/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/erc20/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/erc20/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/erc20/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc20",
-    "version": "1.0.4",
+    "version": "1.0.7",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -67,14 +67,14 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
+        "@0x/base-contract": "^5.0.1",
         "@0x/contracts-exchange-libs": "1.0.2",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/erc721/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/erc721/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/erc721/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/erc721/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc721",
-    "version": "1.0.4",
+    "version": "1.0.7",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -67,13 +67,13 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
+        "@0x/base-contract": "^5.0.1",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/exchange-forwarder/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/exchange-forwarder/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/exchange-forwarder/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/exchange-forwarder/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-forwarder",
-    "version": "1.0.4",
+    "version": "1.0.7",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,12 +46,12 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contract-wrappers": "^7.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contract-wrappers": "^8.0.1",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -68,19 +68,19 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-asset-proxy": "1.0.2",
-        "@0x/contracts-erc20": "1.0.2",
-        "@0x/contracts-erc721": "1.0.2",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-asset-proxy": "^1.0.7",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-erc721": "^1.0.7",
         "@0x/contracts-exchange": "1.0.2",
         "@0x/contracts-exchange-libs": "1.0.2",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/order-utils": "^6.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/exchange-forwarder/test/forwarder.ts

@@ -1,5 +1,10 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
-import { ExchangeWrapper } from '@0x/contracts-exchange';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20Wrapper,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
+import { ExchangeContract, ExchangeWrapper } from '@0x/contracts-exchange';
 import {
     chaiSetup,
     constants,
@@ -21,15 +26,7 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
 import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 
-import {
-    artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ExchangeContract,
-    ForwarderContract,
-    ForwarderWrapper,
-    WETH9Contract,
-} from '../src';
+import { artifacts, ForwarderContract, ForwarderWrapper, WETH9Contract } from '../src';
 
 chaiSetup.configure();
 const expect = chai.expect;

contracts/exchange-forwarder/test/utils/forwarder_wrapper.ts

@@ -1,8 +1,8 @@
-import { constants, formatters, LogDecoder, MarketSellOrders } from '@0x/contracts-test-utils';
+import { constants, formatters, LogDecoder, MarketSellOrders, Web3ProviderEngine } from '@0x/contracts-test-utils';
 import { SignedOrder } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs, TxDataPayable } from 'ethereum-types';
+import { TransactionReceiptWithDecodedLogs, TxDataPayable } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { ForwarderContract } from '../../generated-wrappers/forwarder';
@@ -55,7 +55,7 @@ export class ForwarderWrapper {
         const params = formatters.createMarketSellOrders(signedOrders, constants.ZERO_AMOUNT);
         return params;
     }
-    constructor(contractInstance: ForwarderContract, provider: Provider) {
+    constructor(contractInstance: ForwarderContract, provider: Web3ProviderEngine) {
         this._forwarderContract = contractInstance;
         this._web3Wrapper = new Web3Wrapper(provider);
         this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);

contracts/exchange-libs/CHANGELOG.json

@@ -1,4 +1,36 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.1.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.1.0",
+        "changes": [
+            {
+                "note": "Upgrade contracts to Solidity 0.5.3",
+                "pr": 1604
+            },
+            {
+                "note": "Make constants internal",
+                "pr": 1604
+            }
+        ],
+        "timestamp": 1551130135
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/exchange-libs/CHANGELOG.md

@@ -5,6 +5,19 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.1.1 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.1.0 - _February 25, 2019_
+
+    * Upgrade contracts to Solidity 0.5.3 (#1604)
+    * Make constants internal (#1604)
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/exchange-libs/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/exchange-libs/contracts/src/LibAbiEncoder.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 pragma experimental ABIEncoderV2;
 
 import "./LibOrder.sol";

contracts/exchange-libs/contracts/src/LibAssetProxyErrors.sol

@@ -17,7 +17,7 @@
 */
 
 // solhint-disable
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 /// @dev This contract documents the revert reasons used in the AssetProxy contracts.
@@ -25,14 +25,14 @@ pragma solidity ^0.4.24;
 contract LibAssetProxyErrors {
 
     /// Authorizable errors ///
-    string constant SENDER_NOT_AUTHORIZED = "SENDER_NOT_AUTHORIZED";                        // Sender not authorized to call this method.
-    string constant TARGET_NOT_AUTHORIZED = "TARGET_NOT_AUTHORIZED";                        // Target address not authorized to call this method.
-    string constant TARGET_ALREADY_AUTHORIZED = "TARGET_ALREADY_AUTHORIZED";                // Target address must not already be authorized.
-    string constant INDEX_OUT_OF_BOUNDS = "INDEX_OUT_OF_BOUNDS";                            // Specified array index is out of bounds.
-    string constant AUTHORIZED_ADDRESS_MISMATCH = "AUTHORIZED_ADDRESS_MISMATCH";            // Address at index does not match given target address.
+    string constant internal SENDER_NOT_AUTHORIZED = "SENDER_NOT_AUTHORIZED";                        // Sender not authorized to call this method.
+    string constant internal TARGET_NOT_AUTHORIZED = "TARGET_NOT_AUTHORIZED";                        // Target address not authorized to call this method.
+    string constant internal TARGET_ALREADY_AUTHORIZED = "TARGET_ALREADY_AUTHORIZED";                // Target address must not already be authorized.
+    string constant internal INDEX_OUT_OF_BOUNDS = "INDEX_OUT_OF_BOUNDS";                            // Specified array index is out of bounds.
+    string constant internal AUTHORIZED_ADDRESS_MISMATCH = "AUTHORIZED_ADDRESS_MISMATCH";            // Address at index does not match given target address.
 
     /// Transfer errors ///
-    string constant INVALID_AMOUNT = "INVALID_AMOUNT";                                      // Transfer amount must equal 1.
-    string constant TRANSFER_FAILED = "TRANSFER_FAILED";                                    // Transfer failed.
-    string constant LENGTH_GREATER_THAN_131_REQUIRED = "LENGTH_GREATER_THAN_131_REQUIRED";  // Byte array must have a length greater than 0.
+    string constant internal INVALID_AMOUNT = "INVALID_AMOUNT";                                      // Transfer amount must equal 1.
+    string constant internal TRANSFER_FAILED = "TRANSFER_FAILED";                                    // Transfer failed.
+    string constant internal LENGTH_GREATER_THAN_131_REQUIRED = "LENGTH_GREATER_THAN_131_REQUIRED";  // Byte array must have a length greater than 0.
 }

contracts/exchange-libs/contracts/src/LibConstants.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 // solhint-disable max-line-length

contracts/exchange-libs/contracts/src/LibEIP712.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract LibEIP712 {
@@ -50,7 +50,7 @@ contract LibEIP712 {
             EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
             keccak256(bytes(EIP712_DOMAIN_NAME)),
             keccak256(bytes(EIP712_DOMAIN_VERSION)),
-            bytes32(address(this))
+            uint256(address(this))
         ));
     }
 

contracts/exchange-libs/contracts/src/LibExchangeErrors.sol

@@ -17,7 +17,7 @@
 */
 
 // solhint-disable
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 /// @dev This contract documents the revert reasons used in the Exchange contract.
@@ -25,46 +25,46 @@ pragma solidity ^0.4.24;
 contract LibExchangeErrors {
 
     /// Order validation errors ///
-    string constant ORDER_UNFILLABLE = "ORDER_UNFILLABLE";                              // Order cannot be filled.
-    string constant INVALID_MAKER = "INVALID_MAKER";                                    // Invalid makerAddress.
-    string constant INVALID_TAKER = "INVALID_TAKER";                                    // Invalid takerAddress.
-    string constant INVALID_SENDER = "INVALID_SENDER";                                  // Invalid `msg.sender`.
-    string constant INVALID_ORDER_SIGNATURE = "INVALID_ORDER_SIGNATURE";                // Signature validation failed. 
+    string constant internal ORDER_UNFILLABLE = "ORDER_UNFILLABLE";                              // Order cannot be filled.
+    string constant internal INVALID_MAKER = "INVALID_MAKER";                                    // Invalid makerAddress.
+    string constant internal INVALID_TAKER = "INVALID_TAKER";                                    // Invalid takerAddress.
+    string constant internal INVALID_SENDER = "INVALID_SENDER";                                  // Invalid `msg.sender`.
+    string constant internal INVALID_ORDER_SIGNATURE = "INVALID_ORDER_SIGNATURE";                // Signature validation failed. 
     
     /// fillOrder validation errors ///
-    string constant INVALID_TAKER_AMOUNT = "INVALID_TAKER_AMOUNT";                      // takerAssetFillAmount cannot equal 0.
-    string constant ROUNDING_ERROR = "ROUNDING_ERROR";                                  // Rounding error greater than 0.1% of takerAssetFillAmount. 
+    string constant internal INVALID_TAKER_AMOUNT = "INVALID_TAKER_AMOUNT";                      // takerAssetFillAmount cannot equal 0.
+    string constant internal ROUNDING_ERROR = "ROUNDING_ERROR";                                  // Rounding error greater than 0.1% of takerAssetFillAmount. 
     
     /// Signature validation errors ///
-    string constant INVALID_SIGNATURE = "INVALID_SIGNATURE";                            // Signature validation failed. 
-    string constant SIGNATURE_ILLEGAL = "SIGNATURE_ILLEGAL";                            // Signature type is illegal.
-    string constant SIGNATURE_UNSUPPORTED = "SIGNATURE_UNSUPPORTED";                    // Signature type unsupported.
+    string constant internal INVALID_SIGNATURE = "INVALID_SIGNATURE";                            // Signature validation failed. 
+    string constant internal SIGNATURE_ILLEGAL = "SIGNATURE_ILLEGAL";                            // Signature type is illegal.
+    string constant internal SIGNATURE_UNSUPPORTED = "SIGNATURE_UNSUPPORTED";                    // Signature type unsupported.
     
     /// cancelOrdersUptTo errors ///
-    string constant INVALID_NEW_ORDER_EPOCH = "INVALID_NEW_ORDER_EPOCH";                // Specified salt must be greater than or equal to existing orderEpoch.
+    string constant internal INVALID_NEW_ORDER_EPOCH = "INVALID_NEW_ORDER_EPOCH";                // Specified salt must be greater than or equal to existing orderEpoch.
 
     /// fillOrKillOrder errors ///
-    string constant COMPLETE_FILL_FAILED = "COMPLETE_FILL_FAILED";                      // Desired takerAssetFillAmount could not be completely filled. 
+    string constant internal COMPLETE_FILL_FAILED = "COMPLETE_FILL_FAILED";                      // Desired takerAssetFillAmount could not be completely filled. 
 
     /// matchOrders errors ///
-    string constant NEGATIVE_SPREAD_REQUIRED = "NEGATIVE_SPREAD_REQUIRED";              // Matched orders must have a negative spread.
+    string constant internal NEGATIVE_SPREAD_REQUIRED = "NEGATIVE_SPREAD_REQUIRED";              // Matched orders must have a negative spread.
 
     /// Transaction errors ///
-    string constant REENTRANCY_ILLEGAL = "REENTRANCY_ILLEGAL";                          // Recursive reentrancy is not allowed. 
-    string constant INVALID_TX_HASH = "INVALID_TX_HASH";                                // Transaction has already been executed. 
-    string constant INVALID_TX_SIGNATURE = "INVALID_TX_SIGNATURE";                      // Signature validation failed. 
-    string constant FAILED_EXECUTION = "FAILED_EXECUTION";                              // Transaction execution failed. 
+    string constant internal REENTRANCY_ILLEGAL = "REENTRANCY_ILLEGAL";                          // Recursive reentrancy is not allowed. 
+    string constant internal INVALID_TX_HASH = "INVALID_TX_HASH";                                // Transaction has already been executed. 
+    string constant internal INVALID_TX_SIGNATURE = "INVALID_TX_SIGNATURE";                      // Signature validation failed. 
+    string constant internal FAILED_EXECUTION = "FAILED_EXECUTION";                              // Transaction execution failed. 
     
     /// registerAssetProxy errors ///
-    string constant ASSET_PROXY_ALREADY_EXISTS = "ASSET_PROXY_ALREADY_EXISTS";          // AssetProxy with same id already exists.
+    string constant internal ASSET_PROXY_ALREADY_EXISTS = "ASSET_PROXY_ALREADY_EXISTS";          // AssetProxy with same id already exists.
 
     /// dispatchTransferFrom errors ///
-    string constant ASSET_PROXY_DOES_NOT_EXIST = "ASSET_PROXY_DOES_NOT_EXIST";          // No assetProxy registered at given id.
-    string constant TRANSFER_FAILED = "TRANSFER_FAILED";                                // Asset transfer unsuccesful.
+    string constant internal ASSET_PROXY_DOES_NOT_EXIST = "ASSET_PROXY_DOES_NOT_EXIST";          // No assetProxy registered at given id.
+    string constant internal TRANSFER_FAILED = "TRANSFER_FAILED";                                // Asset transfer unsuccesful.
 
     /// Length validation errors ///
-    string constant LENGTH_GREATER_THAN_0_REQUIRED = "LENGTH_GREATER_THAN_0_REQUIRED";  // Byte array must have a length greater than 0.
-    string constant LENGTH_GREATER_THAN_3_REQUIRED = "LENGTH_GREATER_THAN_3_REQUIRED";  // Byte array must have a length greater than 3.
-    string constant LENGTH_0_REQUIRED = "LENGTH_0_REQUIRED";                            // Byte array must have a length of 0.
-    string constant LENGTH_65_REQUIRED = "LENGTH_65_REQUIRED";                          // Byte array must have a length of 65.
+    string constant internal LENGTH_GREATER_THAN_0_REQUIRED = "LENGTH_GREATER_THAN_0_REQUIRED";  // Byte array must have a length greater than 0.
+    string constant internal LENGTH_GREATER_THAN_3_REQUIRED = "LENGTH_GREATER_THAN_3_REQUIRED";  // Byte array must have a length greater than 3.
+    string constant internal LENGTH_0_REQUIRED = "LENGTH_0_REQUIRED";                            // Byte array must have a length of 0.
+    string constant internal LENGTH_65_REQUIRED = "LENGTH_65_REQUIRED";                          // Byte array must have a length of 65.
 }

contracts/exchange-libs/contracts/src/LibExchangeSelectors.sol

@@ -16,137 +16,137 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 
 contract LibExchangeSelectors {
 
     // solhint-disable max-line-length
     // allowedValidators
-    bytes4 constant public ALLOWED_VALIDATORS_SELECTOR = 0x7b8e3514;
-    bytes4 constant public ALLOWED_VALIDATORS_SELECTOR_GENERATOR = bytes4(keccak256("allowedValidators(address,address)"));
+    bytes4 constant internal ALLOWED_VALIDATORS_SELECTOR = 0x7b8e3514;
+    bytes4 constant internal ALLOWED_VALIDATORS_SELECTOR_GENERATOR = bytes4(keccak256("allowedValidators(address,address)"));
 
     // assetProxies
-    bytes4 constant public ASSET_PROXIES_SELECTOR = 0x3fd3c997;
-    bytes4 constant public ASSET_PROXIES_SELECTOR_GENERATOR = bytes4(keccak256("assetProxies(bytes4)"));
+    bytes4 constant internal ASSET_PROXIES_SELECTOR = 0x3fd3c997;
+    bytes4 constant internal ASSET_PROXIES_SELECTOR_GENERATOR = bytes4(keccak256("assetProxies(bytes4)"));
 
     // batchCancelOrders
-    bytes4 constant public BATCH_CANCEL_ORDERS_SELECTOR = 0x4ac14782;
-    bytes4 constant public BATCH_CANCEL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchCancelOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[])"));
+    bytes4 constant internal BATCH_CANCEL_ORDERS_SELECTOR = 0x4ac14782;
+    bytes4 constant internal BATCH_CANCEL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchCancelOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[])"));
 
     // batchFillOrKillOrders
-    bytes4 constant public BATCH_FILL_OR_KILL_ORDERS_SELECTOR = 0x4d0ae546;
-    bytes4 constant public BATCH_FILL_OR_KILL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrKillOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
+    bytes4 constant internal BATCH_FILL_OR_KILL_ORDERS_SELECTOR = 0x4d0ae546;
+    bytes4 constant internal BATCH_FILL_OR_KILL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrKillOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
 
     // batchFillOrders
-    bytes4 constant public BATCH_FILL_ORDERS_SELECTOR = 0x297bb70b;
-    bytes4 constant public BATCH_FILL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
+    bytes4 constant internal BATCH_FILL_ORDERS_SELECTOR = 0x297bb70b;
+    bytes4 constant internal BATCH_FILL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
 
     // batchFillOrdersNoThrow
-    bytes4 constant public BATCH_FILL_ORDERS_NO_THROW_SELECTOR = 0x50dde190;
-    bytes4 constant public BATCH_FILL_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
+    bytes4 constant internal BATCH_FILL_ORDERS_NO_THROW_SELECTOR = 0x50dde190;
+    bytes4 constant internal BATCH_FILL_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("batchFillOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256[],bytes[])"));
 
     // cancelOrder
-    bytes4 constant public CANCEL_ORDER_SELECTOR = 0xd46b02c3;
-    bytes4 constant public CANCEL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("cancelOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes))"));
+    bytes4 constant internal CANCEL_ORDER_SELECTOR = 0xd46b02c3;
+    bytes4 constant internal CANCEL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("cancelOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes))"));
 
     // cancelOrdersUpTo
-    bytes4 constant public CANCEL_ORDERS_UP_TO_SELECTOR = 0x4f9559b1;
-    bytes4 constant public CANCEL_ORDERS_UP_TO_SELECTOR_GENERATOR = bytes4(keccak256("cancelOrdersUpTo(uint256)"));
+    bytes4 constant internal CANCEL_ORDERS_UP_TO_SELECTOR = 0x4f9559b1;
+    bytes4 constant internal CANCEL_ORDERS_UP_TO_SELECTOR_GENERATOR = bytes4(keccak256("cancelOrdersUpTo(uint256)"));
 
     // cancelled
-    bytes4 constant public CANCELLED_SELECTOR = 0x2ac12622;
-    bytes4 constant public CANCELLED_SELECTOR_GENERATOR = bytes4(keccak256("cancelled(bytes32)"));
+    bytes4 constant internal CANCELLED_SELECTOR = 0x2ac12622;
+    bytes4 constant internal CANCELLED_SELECTOR_GENERATOR = bytes4(keccak256("cancelled(bytes32)"));
 
     // currentContextAddress
-    bytes4 constant public CURRENT_CONTEXT_ADDRESS_SELECTOR = 0xeea086ba;
-    bytes4 constant public CURRENT_CONTEXT_ADDRESS_SELECTOR_GENERATOR = bytes4(keccak256("currentContextAddress()"));
+    bytes4 constant internal CURRENT_CONTEXT_ADDRESS_SELECTOR = 0xeea086ba;
+    bytes4 constant internal CURRENT_CONTEXT_ADDRESS_SELECTOR_GENERATOR = bytes4(keccak256("currentContextAddress()"));
 
     // executeTransaction
-    bytes4 constant public EXECUTE_TRANSACTION_SELECTOR = 0xbfc8bfce;
-    bytes4 constant public EXECUTE_TRANSACTION_SELECTOR_GENERATOR = bytes4(keccak256("executeTransaction(uint256,address,bytes,bytes)"));
+    bytes4 constant internal EXECUTE_TRANSACTION_SELECTOR = 0xbfc8bfce;
+    bytes4 constant internal EXECUTE_TRANSACTION_SELECTOR_GENERATOR = bytes4(keccak256("executeTransaction(uint256,address,bytes,bytes)"));
 
     // fillOrKillOrder
-    bytes4 constant public FILL_OR_KILL_ORDER_SELECTOR = 0x64a3bc15;
-    bytes4 constant public FILL_OR_KILL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("fillOrKillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
+    bytes4 constant internal FILL_OR_KILL_ORDER_SELECTOR = 0x64a3bc15;
+    bytes4 constant internal FILL_OR_KILL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("fillOrKillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
 
     // fillOrder
-    bytes4 constant public FILL_ORDER_SELECTOR = 0xb4be83d5;
-    bytes4 constant public FILL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("fillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
+    bytes4 constant internal FILL_ORDER_SELECTOR = 0xb4be83d5;
+    bytes4 constant internal FILL_ORDER_SELECTOR_GENERATOR = bytes4(keccak256("fillOrder((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
 
     // fillOrderNoThrow
-    bytes4 constant public FILL_ORDER_NO_THROW_SELECTOR = 0x3e228bae;
-    bytes4 constant public FILL_ORDER_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("fillOrderNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
+    bytes4 constant internal FILL_ORDER_NO_THROW_SELECTOR = 0x3e228bae;
+    bytes4 constant internal FILL_ORDER_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("fillOrderNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),uint256,bytes)"));
 
     // filled
-    bytes4 constant public FILLED_SELECTOR = 0x288cdc91;
-    bytes4 constant public FILLED_SELECTOR_GENERATOR = bytes4(keccak256("filled(bytes32)"));
+    bytes4 constant internal FILLED_SELECTOR = 0x288cdc91;
+    bytes4 constant internal FILLED_SELECTOR_GENERATOR = bytes4(keccak256("filled(bytes32)"));
 
     // getAssetProxy
-    bytes4 constant public GET_ASSET_PROXY_SELECTOR = 0x60704108;
-    bytes4 constant public GET_ASSET_PROXY_SELECTOR_GENERATOR = bytes4(keccak256("getAssetProxy(bytes4)"));
+    bytes4 constant internal GET_ASSET_PROXY_SELECTOR = 0x60704108;
+    bytes4 constant internal GET_ASSET_PROXY_SELECTOR_GENERATOR = bytes4(keccak256("getAssetProxy(bytes4)"));
 
     // getOrderInfo
-    bytes4 constant public GET_ORDER_INFO_SELECTOR = 0xc75e0a81;
-    bytes4 constant public GET_ORDER_INFO_SELECTOR_GENERATOR = bytes4(keccak256("getOrderInfo((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes))"));
+    bytes4 constant internal GET_ORDER_INFO_SELECTOR = 0xc75e0a81;
+    bytes4 constant internal GET_ORDER_INFO_SELECTOR_GENERATOR = bytes4(keccak256("getOrderInfo((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes))"));
 
     // getOrdersInfo
-    bytes4 constant public GET_ORDERS_INFO_SELECTOR = 0x7e9d74dc;
-    bytes4 constant public GET_ORDERS_INFO_SELECTOR_GENERATOR = bytes4(keccak256("getOrdersInfo((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[])"));
+    bytes4 constant internal GET_ORDERS_INFO_SELECTOR = 0x7e9d74dc;
+    bytes4 constant internal GET_ORDERS_INFO_SELECTOR_GENERATOR = bytes4(keccak256("getOrdersInfo((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[])"));
 
     // isValidSignature
-    bytes4 constant public IS_VALID_SIGNATURE_SELECTOR = 0x93634702;
-    bytes4 constant public IS_VALID_SIGNATURE_SELECTOR_GENERATOR = bytes4(keccak256("isValidSignature(bytes32,address,bytes)"));
+    bytes4 constant internal IS_VALID_SIGNATURE_SELECTOR = 0x93634702;
+    bytes4 constant internal IS_VALID_SIGNATURE_SELECTOR_GENERATOR = bytes4(keccak256("isValidSignature(bytes32,address,bytes)"));
 
     // marketBuyOrders
-    bytes4 constant public MARKET_BUY_ORDERS_SELECTOR = 0xe5fa431b;
-    bytes4 constant public MARKET_BUY_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("marketBuyOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
+    bytes4 constant internal MARKET_BUY_ORDERS_SELECTOR = 0xe5fa431b;
+    bytes4 constant internal MARKET_BUY_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("marketBuyOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
 
     // marketBuyOrdersNoThrow
-    bytes4 constant public MARKET_BUY_ORDERS_NO_THROW_SELECTOR = 0xa3e20380;
-    bytes4 constant public MARKET_BUY_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("marketBuyOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
+    bytes4 constant internal MARKET_BUY_ORDERS_NO_THROW_SELECTOR = 0xa3e20380;
+    bytes4 constant internal MARKET_BUY_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("marketBuyOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
 
     // marketSellOrders
-    bytes4 constant public MARKET_SELL_ORDERS_SELECTOR = 0x7e1d9808;
-    bytes4 constant public MARKET_SELL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("marketSellOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
+    bytes4 constant internal MARKET_SELL_ORDERS_SELECTOR = 0x7e1d9808;
+    bytes4 constant internal MARKET_SELL_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("marketSellOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
 
     // marketSellOrdersNoThrow
-    bytes4 constant public MARKET_SELL_ORDERS_NO_THROW_SELECTOR = 0xdd1c7d18;
-    bytes4 constant public MARKET_SELL_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("marketSellOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
+    bytes4 constant internal MARKET_SELL_ORDERS_NO_THROW_SELECTOR = 0xdd1c7d18;
+    bytes4 constant internal MARKET_SELL_ORDERS_NO_THROW_SELECTOR_GENERATOR = bytes4(keccak256("marketSellOrdersNoThrow((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes)[],uint256,bytes[])"));
 
     // matchOrders
-    bytes4 constant public MATCH_ORDERS_SELECTOR = 0x3c28d861;
-    bytes4 constant public MATCH_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("matchOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),(address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),bytes,bytes)"));
+    bytes4 constant internal MATCH_ORDERS_SELECTOR = 0x3c28d861;
+    bytes4 constant internal MATCH_ORDERS_SELECTOR_GENERATOR = bytes4(keccak256("matchOrders((address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),(address,address,address,address,uint256,uint256,uint256,uint256,uint256,uint256,bytes,bytes),bytes,bytes)"));
 
     // orderEpoch
-    bytes4 constant public ORDER_EPOCH_SELECTOR = 0xd9bfa73e;
-    bytes4 constant public ORDER_EPOCH_SELECTOR_GENERATOR = bytes4(keccak256("orderEpoch(address,address)"));
+    bytes4 constant internal ORDER_EPOCH_SELECTOR = 0xd9bfa73e;
+    bytes4 constant internal ORDER_EPOCH_SELECTOR_GENERATOR = bytes4(keccak256("orderEpoch(address,address)"));
 
     // owner
-    bytes4 constant public OWNER_SELECTOR = 0x8da5cb5b;
-    bytes4 constant public OWNER_SELECTOR_GENERATOR = bytes4(keccak256("owner()"));
+    bytes4 constant internal OWNER_SELECTOR = 0x8da5cb5b;
+    bytes4 constant internal OWNER_SELECTOR_GENERATOR = bytes4(keccak256("owner()"));
 
     // preSign
-    bytes4 constant public PRE_SIGN_SELECTOR = 0x3683ef8e;
-    bytes4 constant public PRE_SIGN_SELECTOR_GENERATOR = bytes4(keccak256("preSign(bytes32,address,bytes)"));
+    bytes4 constant internal PRE_SIGN_SELECTOR = 0x3683ef8e;
+    bytes4 constant internal PRE_SIGN_SELECTOR_GENERATOR = bytes4(keccak256("preSign(bytes32,address,bytes)"));
 
     // preSigned
-    bytes4 constant public PRE_SIGNED_SELECTOR = 0x82c174d0;
-    bytes4 constant public PRE_SIGNED_SELECTOR_GENERATOR = bytes4(keccak256("preSigned(bytes32,address)"));
+    bytes4 constant internal PRE_SIGNED_SELECTOR = 0x82c174d0;
+    bytes4 constant internal PRE_SIGNED_SELECTOR_GENERATOR = bytes4(keccak256("preSigned(bytes32,address)"));
 
     // registerAssetProxy
-    bytes4 constant public REGISTER_ASSET_PROXY_SELECTOR = 0xc585bb93;
-    bytes4 constant public REGISTER_ASSET_PROXY_SELECTOR_GENERATOR = bytes4(keccak256("registerAssetProxy(address)"));
+    bytes4 constant internal REGISTER_ASSET_PROXY_SELECTOR = 0xc585bb93;
+    bytes4 constant internal REGISTER_ASSET_PROXY_SELECTOR_GENERATOR = bytes4(keccak256("registerAssetProxy(address)"));
 
     // setSignatureValidatorApproval
-    bytes4 constant public SET_SIGNATURE_VALIDATOR_APPROVAL_SELECTOR = 0x77fcce68;
-    bytes4 constant public SET_SIGNATURE_VALIDATOR_APPROVAL_SELECTOR_GENERATOR = bytes4(keccak256("setSignatureValidatorApproval(address,bool)"));
+    bytes4 constant internal SET_SIGNATURE_VALIDATOR_APPROVAL_SELECTOR = 0x77fcce68;
+    bytes4 constant internal SET_SIGNATURE_VALIDATOR_APPROVAL_SELECTOR_GENERATOR = bytes4(keccak256("setSignatureValidatorApproval(address,bool)"));
 
     // transactions
-    bytes4 constant public TRANSACTIONS_SELECTOR = 0x642f2eaf;
-    bytes4 constant public TRANSACTIONS_SELECTOR_GENERATOR = bytes4(keccak256("transactions(bytes32)"));
+    bytes4 constant internal TRANSACTIONS_SELECTOR = 0x642f2eaf;
+    bytes4 constant internal TRANSACTIONS_SELECTOR_GENERATOR = bytes4(keccak256("transactions(bytes32)"));
 
     // transferOwnership
-    bytes4 constant public TRANSFER_OWNERSHIP_SELECTOR = 0xf2fde38b;
-    bytes4 constant public TRANSFER_OWNERSHIP_SELECTOR_GENERATOR = bytes4(keccak256("transferOwnership(address)"));
+    bytes4 constant internal TRANSFER_OWNERSHIP_SELECTOR = 0xf2fde38b;
+    bytes4 constant internal TRANSFER_OWNERSHIP_SELECTOR_GENERATOR = bytes4(keccak256("transferOwnership(address)"));
 }

contracts/exchange-libs/contracts/src/LibFillResults.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "@0x/contracts-utils/contracts/src/SafeMath.sol";
 

contracts/exchange-libs/contracts/src/LibMath.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "@0x/contracts-utils/contracts/src/SafeMath.sol";
 

contracts/exchange-libs/contracts/src/LibOrder.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.3;
 
 import "./LibEIP712.sol";
 

contracts/exchange-libs/contracts/test/TestLibs.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.24;
+pragma solidity 0.5.3;
 pragma experimental ABIEncoderV2;
 
 import "../src/LibMath.sol";

contracts/exchange-libs/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-libs",
-    "version": "1.0.4",
+    "version": "1.1.1",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/libs/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -67,14 +67,14 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-utils": "2.0.1",
-        "@0x/order-utils": "^6.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-utils": "^2.0.6",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/exchange/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.4",
         "changes": [

contracts/exchange/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v1.0.4 - _February 7, 2019_
 
     * Dependencies updated

contracts/exchange/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/exchange/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange",
-    "version": "1.0.4",
+    "version": "1.0.7",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -67,18 +67,18 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-asset-proxy": "1.0.2",
-        "@0x/contracts-erc20": "1.0.2",
-        "@0x/contracts-erc721": "1.0.2",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-asset-proxy": "^1.0.7",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-erc721": "^1.0.7",
         "@0x/contracts-exchange-libs": "1.0.2",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/order-utils": "^6.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "ethereumjs-util": "^5.1.1",
         "lodash": "^4.17.11"
     },

contracts/exchange/test/core.ts

@@ -1,4 +1,14 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
+import {
+    DummyERC20TokenContract,
+    DummyERC20TokenTransferEventArgs,
+    DummyERC721TokenContract,
+    DummyNoReturnERC20TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+    MultiAssetProxyContract,
+} from '@0x/contracts-asset-proxy';
 import {
     chaiSetup,
     constants,
@@ -24,16 +34,9 @@ import * as _ from 'lodash';
 
 import {
     artifacts,
-    DummyERC20TokenContract,
-    DummyERC20TokenTransferEventArgs,
-    DummyERC721TokenContract,
-    DummyNoReturnERC20TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
     ExchangeCancelEventArgs,
     ExchangeContract,
     ExchangeWrapper,
-    MultiAssetProxyContract,
     ReentrantERC20TokenContract,
     TestStaticCallReceiverContract,
 } from '../src';

contracts/exchange/test/dispatcher.ts

@@ -1,4 +1,10 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
+import {
+    DummyERC20TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
 import {
     chaiSetup,
     constants,
@@ -18,9 +24,6 @@ import * as _ from 'lodash';
 
 import {
     artifacts,
-    DummyERC20TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
     TestAssetProxyDispatcherAssetProxyRegisteredEventArgs,
     TestAssetProxyDispatcherContract,
 } from '../src';

contracts/exchange/test/match_orders.ts

@@ -1,4 +1,11 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
 import {
     chaiSetup,
     constants,
@@ -20,10 +27,6 @@ import * as _ from 'lodash';
 
 import {
     artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
     ExchangeContract,
     ExchangeWrapper,
     MatchOrderTester,

contracts/exchange/test/transactions.ts

@@ -1,5 +1,4 @@
-import { ERC20ProxyContract, ERC20Wrapper } from '@0x/contracts-asset-proxy';
-import { DummyERC20TokenContract } from '@0x/contracts-erc20';
+import { DummyERC20TokenContract, ERC20ProxyContract, ERC20Wrapper } from '@0x/contracts-asset-proxy';
 import {
     chaiSetup,
     constants,

contracts/exchange/test/utils/exchange_wrapper.ts

@@ -1,8 +1,15 @@
-import { FillResults, formatters, LogDecoder, OrderInfo, orderUtils } from '@0x/contracts-test-utils';
+import {
+    FillResults,
+    formatters,
+    LogDecoder,
+    OrderInfo,
+    orderUtils,
+    Web3ProviderEngine,
+} from '@0x/contracts-test-utils';
 import { SignedOrder, SignedZeroExTransaction } from '@0x/types';
 import { AbiEncoder, BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { MethodAbi, Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import { MethodAbi, TransactionReceiptWithDecodedLogs, ZeroExProvider } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { artifacts, ExchangeContract } from '../../src';
@@ -13,7 +20,7 @@ export class ExchangeWrapper {
     private readonly _exchange: ExchangeContract;
     private readonly _web3Wrapper: Web3Wrapper;
     private readonly _logDecoder: LogDecoder;
-    constructor(exchangeContract: ExchangeContract, provider: Provider) {
+    constructor(exchangeContract: ExchangeContract, provider: Web3ProviderEngine | ZeroExProvider) {
         this._exchange = exchangeContract;
         this._web3Wrapper = new Web3Wrapper(provider);
         this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);

contracts/exchange/test/utils/fill_order_combinatorial_utils.ts

@@ -15,6 +15,7 @@ import {
     TakerAssetFillAmountScenario,
     TakerScenario,
     TraderStateScenario,
+    Web3ProviderEngine,
 } from '@0x/contracts-test-utils';
 import {
     assetDataUtils,
@@ -25,10 +26,10 @@ import {
     OrderValidationUtils,
 } from '@0x/order-utils';
 import { AssetProxyId, RevertReason, SignatureType, SignedOrder } from '@0x/types';
-import { BigNumber, errorUtils, logUtils } from '@0x/utils';
+import { BigNumber, errorUtils, logUtils, providerUtils } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
-import { LogWithDecodedArgs, Provider, TxData } from 'ethereum-types';
+import { LogWithDecodedArgs, TxData } from 'ethereum-types';
 import * as _ from 'lodash';
 import 'make-promises-safe';
 
@@ -59,7 +60,8 @@ export async function fillOrderCombinatorialUtilsFactoryAsync(
     const [ownerAddress, makerAddress, takerAddress] = userAddresses;
     const makerPrivateKey = constants.TESTRPC_PRIVATE_KEYS[userAddresses.indexOf(makerAddress)];
 
-    const provider = web3Wrapper.getProvider();
+    const supportedProvider = web3Wrapper.getProvider();
+    const provider = providerUtils.standardizeOrThrow(supportedProvider);
     const erc20Wrapper = new ERC20Wrapper(provider, userAddresses, ownerAddress);
     const erc721Wrapper = new ERC721Wrapper(provider, userAddresses, ownerAddress);
 
@@ -351,7 +353,7 @@ export class FillOrderCombinatorialUtils {
         this.testLibsContract = testLibsContract;
     }
     public async testFillOrderScenarioAsync(
-        provider: Provider,
+        provider: Web3ProviderEngine,
         fillScenario: FillScenario,
         isVerbose: boolean = false,
     ): Promise<void> {

contracts/exchange/test/wrapper.ts

@@ -1,4 +1,11 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
 import {
     chaiSetup,
     constants,
@@ -20,16 +27,7 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 
-import {
-    artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
-    ExchangeContract,
-    ExchangeWrapper,
-    ReentrantERC20TokenContract,
-} from '../src';
+import { artifacts, ExchangeContract, ExchangeWrapper, ReentrantERC20TokenContract } from '../src';
 
 chaiSetup.configure();
 const expect = chai.expect;

contracts/extensions/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "2.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "2.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "2.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "2.0.3",
         "changes": [

contracts/extensions/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.6 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v2.0.5 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v2.0.4 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v2.0.3 - _February 7, 2019_
 
     * Dependencies updated

contracts/extensions/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/extensions/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-extensions",
-    "version": "2.0.3",
+    "version": "2.0.6",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,12 +46,12 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contract-wrappers": "^7.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contract-wrappers": "^8.0.1",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -68,19 +68,19 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-asset-proxy": "1.0.2",
-        "@0x/contracts-erc20": "1.0.2",
-        "@0x/contracts-erc721": "1.0.2",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-asset-proxy": "^1.0.7",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-erc721": "^1.0.7",
         "@0x/contracts-exchange": "1.0.2",
         "@0x/contracts-exchange-libs": "1.0.2",
         "@0x/contracts-utils": "2.0.1",
-        "@0x/order-utils": "^6.0.1",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/extensions/test/balance_threshold_filter.ts

@@ -1,4 +1,4 @@
-import { ExchangeWrapper } from '@0x/contracts-exchange';
+import { ExchangeContract, ExchangeWrapper } from '@0x/contracts-exchange';
 import { BlockchainLifecycle } from '@0x/dev-utils';
 import { assetDataUtils } from '@0x/order-utils';
 import { Order, RevertReason, SignedOrder } from '@0x/types';
@@ -24,7 +24,7 @@ import {
     web3Wrapper,
 } from '@0x/contracts-test-utils';
 
-import { artifacts, BalanceThresholdFilterContract, BalanceThresholdWrapper, ExchangeContract } from '../src';
+import { artifacts, BalanceThresholdFilterContract, BalanceThresholdWrapper } from '../src';
 
 chaiSetup.configure();
 const expect = chai.expect;

contracts/extensions/test/dutch_auction.ts

@@ -1,6 +1,11 @@
 import { DutchAuctionWrapper } from '@0x/contract-wrappers';
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
-import { ExchangeWrapper } from '@0x/contracts-exchange';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20Wrapper,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
+import { ExchangeContract, ExchangeWrapper } from '@0x/contracts-exchange';
 import {
     chaiSetup,
     constants,
@@ -21,15 +26,7 @@ import { Web3Wrapper } from '@0x/web3-wrapper';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 
-import {
-    artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    DutchAuctionContract,
-    DutchAuctionTestWrapper,
-    ExchangeContract,
-    WETH9Contract,
-} from '../src';
+import { artifacts, DutchAuctionContract, DutchAuctionTestWrapper, WETH9Contract } from '../src';
 
 chaiSetup.configure();
 const expect = chai.expect;

contracts/extensions/test/order_matcher.ts

@@ -1,5 +1,11 @@
-import { ERC20Wrapper } from '@0x/contracts-asset-proxy';
-import { ExchangeWrapper } from '@0x/contracts-exchange';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+} from '@0x/contracts-asset-proxy';
+import { ExchangeContract, ExchangeWrapper } from '@0x/contracts-exchange';
 import {
     chaiSetup,
     constants,
@@ -22,16 +28,7 @@ import * as chai from 'chai';
 import { LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import {
-    artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
-    ExchangeContract,
-    ExchangeFillEventArgs,
-    OrderMatcherContract,
-} from '../src';
+import { artifacts, ExchangeFillEventArgs, OrderMatcherContract } from '../src';
 
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
 chaiSetup.configure();

contracts/extensions/test/order_validator.ts

@@ -1,5 +1,12 @@
-import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
-import { ExchangeWrapper } from '@0x/contracts-exchange';
+import {
+    DummyERC20TokenContract,
+    DummyERC721TokenContract,
+    ERC20ProxyContract,
+    ERC20Wrapper,
+    ERC721ProxyContract,
+    ERC721Wrapper,
+} from '@0x/contracts-asset-proxy';
+import { ExchangeContract, ExchangeWrapper } from '@0x/contracts-exchange';
 import {
     chaiSetup,
     constants,
@@ -16,15 +23,7 @@ import { BigNumber } from '@0x/utils';
 import * as chai from 'chai';
 import * as _ from 'lodash';
 
-import {
-    artifacts,
-    DummyERC20TokenContract,
-    DummyERC721TokenContract,
-    ERC20ProxyContract,
-    ERC721ProxyContract,
-    ExchangeContract,
-    OrderValidatorContract,
-} from '../src';
+import { artifacts, OrderValidatorContract } from '../src';
 
 chaiSetup.configure();
 const expect = chai.expect;

contracts/extensions/test/utils/balance_threshold_wrapper.ts

@@ -1,3 +1,4 @@
+import { ExchangeContract } from '@0x/contracts-exchange';
 import {
     FillResults,
     formatters,
@@ -5,14 +6,15 @@ import {
     OrderInfo,
     orderUtils,
     TransactionFactory,
+    Web3ProviderEngine,
 } from '@0x/contracts-test-utils';
 import { SignedOrder } from '@0x/types';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { artifacts, BalanceThresholdFilterContract, ExchangeContract } from '../../src';
+import { artifacts, BalanceThresholdFilterContract } from '../../src';
 
 export class BalanceThresholdWrapper {
     private readonly _balanceThresholdFilter: BalanceThresholdFilterContract;
@@ -24,7 +26,7 @@ export class BalanceThresholdWrapper {
         balanceThresholdFilter: BalanceThresholdFilterContract,
         exchangeContract: ExchangeContract,
         signerTransactionFactory: TransactionFactory,
-        provider: Provider,
+        provider: Web3ProviderEngine,
     ) {
         this._balanceThresholdFilter = balanceThresholdFilter;
         this._exchange = exchangeContract;

contracts/extensions/test/utils/dutch_auction_test_wrapper.ts

@@ -1,7 +1,7 @@
-import { LogDecoder } from '@0x/contracts-test-utils';
+import { LogDecoder, Web3ProviderEngine } from '@0x/contracts-test-utils';
 import { DutchAuctionDetails, SignedOrder } from '@0x/types';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { DutchAuctionContract } from '../../generated-wrappers/dutch_auction';
@@ -12,7 +12,7 @@ export class DutchAuctionTestWrapper {
     private readonly _web3Wrapper: Web3Wrapper;
     private readonly _logDecoder: LogDecoder;
 
-    constructor(contractInstance: DutchAuctionContract, provider: Provider) {
+    constructor(contractInstance: DutchAuctionContract, provider: Web3ProviderEngine) {
         this._dutchAuctionContract = contractInstance;
         this._web3Wrapper = new Web3Wrapper(provider);
         this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);

contracts/multisig/CHANGELOG.json

@@ -1,4 +1,31 @@
 [
+    {
+        "timestamp": 1551220833,
+        "version": "2.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "2.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "2.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "2.0.3",
         "changes": [

contracts/multisig/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.6 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v2.0.5 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v2.0.4 - _February 9, 2019_
+
+    * Dependencies updated
+
 ## v2.0.3 - _February 7, 2019_
 
     * Dependencies updated

contracts/multisig/compiler.json

@@ -2,6 +2,7 @@
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
     "useDockerisedSolc": true,
+    "isOfflineMode": false,
     "compilerSettings": {
         "optimizer": { "enabled": true, "runs": 1000000 },
         "outputSelection": {

contracts/multisig/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-multisig",
-    "version": "2.0.3",
+    "version": "2.0.6",
     "engines": {
         "node": ">=6.12"
     },
@@ -46,11 +46,11 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/multisig/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.2",
-        "@0x/contracts-gen": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.3",
-        "@0x/dev-utils": "^2.0.2",
-        "@0x/sol-compiler": "^3.0.2",
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
         "@0x/tslint-config": "^3.0.0",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
@@ -67,14 +67,15 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.2",
-        "@0x/contracts-asset-proxy": "1.0.2",
-        "@0x/contracts-erc20": "1.0.2",
-        "@0x/types": "^2.0.2",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.3",
-        "@0x/web3-wrapper": "^4.0.2",
-        "ethereum-types": "^2.0.0",
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-asset-proxy": "^1.0.7",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-utils": "2.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/multisig/test/utils/asset_proxy_owner_wrapper.ts

@@ -1,7 +1,7 @@
-import { LogDecoder } from '@0x/contracts-test-utils';
+import { LogDecoder, Web3ProviderEngine } from '@0x/contracts-test-utils';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { AssetProxyOwnerContract } from '../../generated-wrappers/asset_proxy_owner';
@@ -11,7 +11,7 @@ export class AssetProxyOwnerWrapper {
     private readonly _assetProxyOwner: AssetProxyOwnerContract;
     private readonly _web3Wrapper: Web3Wrapper;
     private readonly _logDecoder: LogDecoder;
-    constructor(assetproxyOwnerContract: AssetProxyOwnerContract, provider: Provider) {
+    constructor(assetproxyOwnerContract: AssetProxyOwnerContract, provider: Web3ProviderEngine) {
         this._assetProxyOwner = assetproxyOwnerContract;
         this._web3Wrapper = new Web3Wrapper(provider);
         this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);

contracts/multisig/test/utils/multi_sig_wrapper.ts

@@ -1,7 +1,7 @@
-import { LogDecoder } from '@0x/contracts-test-utils';
+import { LogDecoder, Web3ProviderEngine } from '@0x/contracts-test-utils';
 import { BigNumber } from '@0x/utils';
 import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { MultiSigWalletContract } from '../../generated-wrappers/multi_sig_wallet';
@@ -11,7 +11,7 @@ export class MultiSigWrapper {
     private readonly _multiSig: MultiSigWalletContract;
     private readonly _web3Wrapper: Web3Wrapper;
     private readonly _logDecoder: LogDecoder;
-    constructor(multiSigContract: MultiSigWalletContract, provider: Provider) {
+    constructor(multiSigContract: MultiSigWalletContract, provider: Web3ProviderEngine) {
         this._multiSig = multiSigContract;
         this._web3Wrapper = new Web3Wrapper(provider);
         this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);

contracts/tec/CHANGELOG.json

@@ -0,0 +1,11 @@
+[
+    {
+        "timestamp": 1551220833,
+        "version": "0.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    }
+]

contracts/tec/CHANGELOG.md

@@ -0,0 +1,10 @@
+<!--
+changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v0.0.2 - _February 26, 2019_
+
+    * Dependencies updated

contracts/tec/DEPLOYS.json

@@ -0,0 +1 @@
+[]

contracts/tec/README.md

@@ -0,0 +1,73 @@
+## Trade Execution Coordinator (TEC)
+
+This package contains a contract that allows users to call arbitrary functions on the Exchange contract with permission from one or more TECs (Trade Execution Coordinators). Addresses of the deployed contracts can be found in the 0x [wiki](https://0xproject.com/wiki#Deployed-Addresses) or the [DEPLOYS](./DEPLOYS.json) file within this package.
+
+## Installation
+
+**Install**
+
+```bash
+npm install @0x/contracts-tec --save
+```
+
+## Bug bounty
+
+A bug bounty for the 2.0.0 contracts is ongoing! Instructions can be found [here](https://0xproject.com/wiki#Bug-Bounty).
+
+## Contributing
+
+We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+
+For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0x/contracts-tec yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/contracts-tec yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
+
+#### Testing options
+
+Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md).

contracts/tec/compiler.json

@@ -0,0 +1,20 @@
+{
+    "artifactsDir": "./generated-artifacts",
+    "contractsDir": "./contracts",
+    "useDockerisedSolc": true,
+    "compilerSettings": {
+        "optimizer": { "enabled": true, "runs": 1000000 },
+        "outputSelection": {
+            "*": {
+                "*": [
+                    "abi",
+                    "evm.bytecode.object",
+                    "evm.bytecode.sourceMap",
+                    "evm.deployedBytecode.object",
+                    "evm.deployedBytecode.sourceMap"
+                ]
+            }
+        }
+    },
+    "contracts": ["src/TEC.sol", "test/TestLibs.sol", "test/TestMixins.sol"]
+}

contracts/tec/contracts/src/MixinSignatureValidator.sol

@@ -0,0 +1,107 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+import "@0x/contracts-utils/contracts/src/LibBytes.sol";
+import "./mixins/MSignatureValidator.sol";
+
+
+contract MixinSignatureValidator is
+    MSignatureValidator
+{
+    using LibBytes for bytes;
+
+    /// @dev Recovers the address of a signer given a hash and signature.
+    /// @param hash Any 32 byte hash.
+    /// @param signature Proof that the hash has been signed by signer.
+    function getSignerAddress(bytes32 hash, bytes memory signature)
+        public
+        pure
+        returns (address signerAddress)
+    {
+        require(
+            signature.length > 0,
+            "LENGTH_GREATER_THAN_0_REQUIRED"
+        );
+
+        // Pop last byte off of signature byte array.
+        uint8 signatureTypeRaw = uint8(signature.popLastByte());
+
+        // Ensure signature is supported
+        require(
+            signatureTypeRaw < uint8(SignatureType.NSignatureTypes),
+            "SIGNATURE_UNSUPPORTED"
+        );
+
+        SignatureType signatureType = SignatureType(signatureTypeRaw);
+
+        // Always illegal signature.
+        // This is always an implicit option since a signer can create a
+        // signature array with invalid type or length. We may as well make
+        // it an explicit option. This aids testing and analysis. It is
+        // also the initialization value for the enum type.
+        if (signatureType == SignatureType.Illegal) {
+            revert("SIGNATURE_ILLEGAL");
+
+        // Signature using EIP712
+        } else if (signatureType == SignatureType.EIP712) {
+            require(
+                signature.length == 65,
+                "LENGTH_65_REQUIRED"
+            );
+            uint8 v = uint8(signature[0]);
+            bytes32 r = signature.readBytes32(1);
+            bytes32 s = signature.readBytes32(33);
+            signerAddress = ecrecover(
+                hash,
+                v,
+                r,
+                s
+            );
+            return signerAddress;
+
+        // Signed using web3.eth_sign
+        } else if (signatureType == SignatureType.EthSign) {
+            require(
+                signature.length == 65,
+                "LENGTH_65_REQUIRED"
+            );
+            uint8 v = uint8(signature[0]);
+            bytes32 r = signature.readBytes32(1);
+            bytes32 s = signature.readBytes32(33);
+            signerAddress = ecrecover(
+                keccak256(abi.encodePacked(
+                    "\x19Ethereum Signed Message:\n32",
+                    hash
+                )),
+                v,
+                r,
+                s
+            );
+            return signerAddress;
+        }
+
+        // Anything else is illegal (We do not return false because
+        // the signature may actually be valid, just not in a format
+        // that we currently support. In this case returning false
+        // may lead the caller to incorrectly believe that the
+        // signature was invalid.)
+        revert("SIGNATURE_UNSUPPORTED");
+    }
+}

contracts/tec/contracts/src/MixinTECApprovalVerifier.sol

@@ -0,0 +1,200 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibExchangeSelectors.sol";
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "@0x/contracts-utils/contracts/src/LibBytes.sol";
+import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
+import "./libs/LibTECApproval.sol";
+import "./libs/LibZeroExTransaction.sol";
+import "./mixins/MSignatureValidator.sol";
+import "./mixins/MTECApprovalVerifier.sol";
+
+
+// solhint-disable avoid-tx-origin
+contract MixinTECApprovalVerifier is
+    LibExchangeSelectors,
+    LibTECApproval,
+    LibZeroExTransaction,
+    MSignatureValidator,
+    MTECApprovalVerifier
+{
+    using LibBytes for bytes;
+    using LibAddressArray for address[];
+
+    /// @dev Validates that the 0x transaction has been approved by all of the feeRecipients
+    ///      that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function assertValidTECApprovals(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view
+    {
+        // Get the orders from the the Exchange calldata in the 0x transaction
+        LibOrder.Order[] memory orders = decodeFillDataOrders(transaction.data);
+
+        // No approval is required for non-fill methods
+        if (orders.length > 0) {
+            // Revert if approval is invalid for transaction orders
+            assertValidTransactionOrdersApproval(
+                transaction,
+                orders,
+                transactionSignature,
+                approvalExpirationTimeSeconds,
+                approvalSignatures
+            );
+        }
+    }
+
+    /// @dev Validates that the feeRecipients of a batch of order have approved a 0x transaction.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param orders Array of order structs containing order specifications.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order.
+    function assertValidTransactionOrdersApproval(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        LibOrder.Order[] memory orders,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view
+    {
+        // Hash 0x transaction
+        bytes32 transactionHash = getTransactionHash(transaction);
+
+        // Create empty list of approval signers
+        address[] memory approvalSignerAddresses = new address[](0);
+
+        uint256 signaturesLength = approvalSignatures.length;
+        for (uint256 i = 0; i < signaturesLength; i++) {
+            // Create approval message
+            uint256 currentApprovalExpirationTimeSeconds = approvalExpirationTimeSeconds[i];
+            TECApproval memory approval = TECApproval({
+                transactionHash: transactionHash,
+                transactionSignature: transactionSignature,
+                approvalExpirationTimeSeconds: currentApprovalExpirationTimeSeconds
+            });
+
+            // Ensure approval has not expired
+            require(
+                // solhint-disable-next-line not-rely-on-time
+                currentApprovalExpirationTimeSeconds > block.timestamp,
+                "APPROVAL_EXPIRED"
+            );
+
+            // Hash approval message and recover signer address
+            bytes32 approvalHash = getTECApprovalHash(approval);
+            address approvalSignerAddress = getSignerAddress(approvalHash, approvalSignatures[i]);
+    
+            // Add approval signer to list of signers
+            approvalSignerAddresses = approvalSignerAddresses.append(approvalSignerAddress);
+        }
+        
+        uint256 ordersLength = orders.length;
+        for (uint256 i = 0; i < ordersLength; i++) {
+            // Do not check approval if the order's senderAddress is null
+            if (orders[i].senderAddress == address(0)) {
+                continue;
+            }
+            
+            // Ethereum transaction signer gives implicit signature of approval
+            address approverAddress = orders[i].feeRecipientAddress;
+            if (approverAddress == tx.origin) {
+                approvalSignerAddresses = approvalSignerAddresses.append(tx.origin);
+                continue;
+            }
+
+            // Ensure feeRecipient of order has approved this 0x transaction
+            bool isOrderApproved = approvalSignerAddresses.contains(approverAddress);
+            require(
+                isOrderApproved,
+                "INVALID_APPROVAL_SIGNATURE"
+            );
+
+            // The Ethereum transaction signer must be the 0x transaction signer or an approver of the 0x transaction
+            require(
+                transaction.signerAddress == tx.origin || approvalSignerAddresses.contains(tx.origin),
+                "INVALID_SENDER"
+            );
+        }
+    }
+
+    /// @dev Decodes the orders from Exchange calldata representing any fill method.
+    /// @param data Exchange calldata representing a fill method.
+    /// @return The orders from the Exchange calldata.
+    function decodeFillDataOrders(bytes memory data)
+        internal
+        pure
+        returns (LibOrder.Order[] memory orders)
+    {
+        bytes4 selector = data.readBytes4(0);
+        if (
+            selector == FILL_ORDER_SELECTOR ||
+            selector == FILL_ORDER_NO_THROW_SELECTOR ||
+            selector == FILL_OR_KILL_ORDER_SELECTOR
+        ) {
+            // Decode single order
+            (LibOrder.Order memory order) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order)
+            );
+            orders = new LibOrder.Order[](1);
+            orders[0] = order;
+        } else if (
+            selector == BATCH_FILL_ORDERS_SELECTOR ||
+            selector == BATCH_FILL_ORDERS_NO_THROW_SELECTOR ||
+            selector == BATCH_FILL_OR_KILL_ORDERS_SELECTOR ||
+            selector == MARKET_BUY_ORDERS_SELECTOR ||
+            selector == MARKET_BUY_ORDERS_NO_THROW_SELECTOR ||
+            selector == MARKET_SELL_ORDERS_SELECTOR ||
+            selector == MARKET_SELL_ORDERS_NO_THROW_SELECTOR
+        ) {
+            // Decode all orders
+            // solhint-disable indent
+            (orders) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order[])
+            );
+        } else if (selector == MATCH_ORDERS_SELECTOR) {
+            // Decode left and right orders
+            (LibOrder.Order memory leftOrder, LibOrder.Order memory rightOrder) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order, LibOrder.Order)
+            );
+
+            // Create array of orders
+            orders = new LibOrder.Order[](2);
+            orders[0] = leftOrder;
+            orders[1] = rightOrder;
+        }
+        return orders;
+    }
+}

contracts/tec/contracts/src/MixinTECCore.sol

@@ -0,0 +1,62 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "./libs/LibZeroExTransaction.sol";
+import "./libs/LibConstants.sol";
+import "./mixins/MTECApprovalVerifier.sol";
+import "./interfaces/ITECCore.sol";
+
+
+contract MixinTECCore is
+    LibConstants,
+    MTECApprovalVerifier,
+    ITECCore
+{
+    /// @dev Executes a 0x transaction that has been signed by the feeRecipients that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function executeTransaction(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+    {
+        // Validate that the 0x transaction has been approves by each feeRecipient
+        assertValidTECApprovals(
+            transaction,
+            transactionSignature,
+            approvalExpirationTimeSeconds,
+            approvalSignatures
+        );
+
+        // Execute the transaction
+        EXCHANGE.executeTransaction(
+            transaction.salt,
+            transaction.signerAddress,
+            transaction.data,
+            transactionSignature
+        );
+    }
+}

contracts/tec/contracts/src/TEC.sol

@@ -0,0 +1,39 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "./libs/LibConstants.sol";
+import "./MixinSignatureValidator.sol";
+import "./MixinTECApprovalVerifier.sol";
+import "./MixinTECCore.sol";
+
+
+// solhint-disable no-empty-blocks
+contract TEC is
+    LibConstants,
+    MixinSignatureValidator,
+    MixinTECApprovalVerifier,
+    MixinTECCore
+{
+    constructor (address _exchange)
+        public
+        LibConstants(_exchange)
+    {}
+}

contracts/tec/contracts/src/interfaces/ISignatureValidator.sol

@@ -0,0 +1,31 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+
+contract ISignatureValidator {
+
+    /// @dev Recovers the address of a signer given a hash and signature.
+    /// @param hash Any 32 byte hash.
+    /// @param signature Proof that the hash has been signed by signer.
+    function getSignerAddress(bytes32 hash, bytes memory signature)
+        public
+        pure
+        returns (address signerAddress);
+}

contracts/tec/contracts/src/interfaces/ITECApprovalVerifier.sol

@@ -0,0 +1,58 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "../libs/LibZeroExTransaction.sol";
+
+
+contract ITECApprovalVerifier {
+
+    /// @dev Validates that the 0x transaction has been approved by all of the feeRecipients
+    ///      that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function assertValidTECApprovals(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view;
+
+    /// @dev Validates that the feeRecipients of a batch of order have approved a 0x transaction.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param orders Array of order structs containing order specifications.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order.
+    function assertValidTransactionOrdersApproval(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        LibOrder.Order[] memory orders,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view;
+}

contracts/tec/contracts/src/interfaces/ITECCore.sol

@@ -0,0 +1,39 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "../libs/LibZeroExTransaction.sol";
+
+
+contract ITECCore {
+
+    /// @dev Executes a 0x transaction that has been signed by the feeRecipients that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function executeTransaction(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public;
+}

contracts/tec/contracts/src/interfaces/ITransactions.sol

@@ -0,0 +1,35 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+pragma solidity ^0.5.3;
+
+
+contract ITransactions {
+
+    /// @dev Executes an exchange method call in the context of signer.
+    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+    /// @param signerAddress Address of transaction signer.
+    /// @param data AbiV2 encoded calldata.
+    /// @param signature Proof of signer transaction by signer.
+    function executeTransaction(
+        uint256 salt,
+        address signerAddress,
+        bytes calldata data,
+        bytes calldata signature
+    )
+        external;
+}

contracts/tec/contracts/src/libs/LibConstants.sol

@@ -0,0 +1,34 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+import "../interfaces/ITransactions.sol";
+
+
+contract LibConstants {
+
+     // solhint-disable-next-line var-name-mixedcase
+    ITransactions internal EXCHANGE;
+
+    constructor (address _exchange)
+        public
+    {
+        EXCHANGE = ITransactions(_exchange);
+    }
+}

contracts/tec/contracts/src/libs/LibEIP712Domain.sol

@@ -0,0 +1,87 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+
+contract LibEIP712Domain {
+
+    // EIP191 header for EIP712 prefix
+    string constant internal EIP191_HEADER = "\x19\x01";
+
+    // EIP712 Domain Name value
+    string constant internal EIP712_DOMAIN_NAME = "0x Protocol Trade Execution Coordinator";
+
+    // EIP712 Domain Version value
+    string constant internal EIP712_DOMAIN_VERSION = "1.0.0";
+
+    // Hash of the EIP712 Domain Separator Schema
+    bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked(
+        "EIP712Domain(",
+        "string name,",
+        "string version,",
+        "address verifyingContract",
+        ")"
+    ));
+
+    // Hash of the EIP712 Domain Separator data
+    // solhint-disable-next-line var-name-mixedcase
+    bytes32 public EIP712_DOMAIN_HASH;
+
+    constructor ()
+        public
+    {
+        EIP712_DOMAIN_HASH = keccak256(abi.encodePacked(
+            EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
+            keccak256(bytes(EIP712_DOMAIN_NAME)),
+            keccak256(bytes(EIP712_DOMAIN_VERSION)),
+            uint256(address(this))
+        ));
+    }
+
+    /// @dev Calculates EIP712 encoding for a hash struct in this EIP712 Domain.
+    /// @param hashStruct The EIP712 hash struct.
+    /// @return EIP712 hash applied to this EIP712 Domain.
+    function hashEIP712Message(bytes32 hashStruct)
+        internal
+        view
+        returns (bytes32 result)
+    {
+        bytes32 eip712DomainHash = EIP712_DOMAIN_HASH;
+
+        // Assembly for more efficient computing:
+        // keccak256(abi.encodePacked(
+        //     EIP191_HEADER,
+        //     EIP712_DOMAIN_HASH,
+        //     hashStruct    
+        // ));
+
+        assembly {
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, 0x1901000000000000000000000000000000000000000000000000000000000000)  // EIP191 header
+            mstore(add(memPtr, 2), eip712DomainHash)                                            // EIP712 domain hash
+            mstore(add(memPtr, 34), hashStruct)                                                 // Hash of struct
+
+            // Compute hash
+            result := keccak256(memPtr, 66)
+        }
+        return result;
+    }
+}

contracts/tec/contracts/src/libs/LibTECApproval.sol

@@ -0,0 +1,89 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+import "./LibEIP712Domain.sol";
+
+
+contract LibTECApproval is
+    LibEIP712Domain
+{
+    // Hash for the EIP712 TEC approval message
+    bytes32 constant internal EIP712_TEC_APPROVAL_SCHEMA_HASH = keccak256(abi.encodePacked(
+        "TECApproval(",
+        "bytes32 transactionHash,",
+        "bytes transactionSignature,",
+        "uint256 approvalExpirationTimeSeconds",
+        ")"
+    ));
+
+    struct TECApproval {
+        bytes32 transactionHash;                // EIP712 hash of the transaction, using the domain separator of this contract.
+        bytes transactionSignature;             // Signature of the 0x transaction.
+        uint256 approvalExpirationTimeSeconds;  // Timestamp in seconds for which the signature expires.
+    }
+
+    /// @dev Calculated the EIP712 hash of the TEC approval mesasage using the domain separator of this contract.
+    /// @param approval TEC approval message containing the transaction hash, transaction signature, and expiration of the approval.
+    /// @return EIP712 hash of the TEC approval message with the domain separator of this contract.
+    function getTECApprovalHash(TECApproval memory approval)
+        internal
+        view
+        returns (bytes32 approvalHash)
+    {
+        approvalHash = hashEIP712Message(hashTECApproval(approval));
+        return approvalHash;
+    }
+
+    /// @dev Calculated the EIP712 hash of the TEC approval mesasage with no domain separator.
+    /// @param approval TEC approval message containing the transaction hash, transaction signature, and expiration of the approval.
+    /// @return EIP712 hash of the TEC approval message with no domain separator.
+    function hashTECApproval(TECApproval memory approval)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = EIP712_TEC_APPROVAL_SCHEMA_HASH;
+        bytes32 transactionSignatureHash = keccak256(approval.transactionSignature);
+        // TODO(abandeali1): optimize by loading from memory in assembly
+        bytes32 transactionHash = approval.transactionHash;
+        uint256 approvalExpirationTimeSeconds = approval.approvalExpirationTimeSeconds;
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encodePacked(
+        //     EIP712_TEC_APPROVAL_SCHEMA_HASH,
+        //     approval.transactionHash,
+        //     keccak256(approval.transactionSignature)
+        //     approval.expiration,
+        // ));
+
+        assembly {
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, schemaHash)                              // hash of schema
+            mstore(add(memPtr, 32), transactionHash)                // transactionHash
+            mstore(add(memPtr, 64), transactionSignatureHash)       // transactionSignatureHash
+            mstore(add(memPtr, 96), approvalExpirationTimeSeconds)  // approvalExpirationTimeSeconds
+            // Compute hash
+            result := keccak256(memPtr, 128)
+        }
+        return result;
+    }
+}

contracts/tec/contracts/src/libs/LibZeroExTransaction.sol

@@ -0,0 +1,91 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+import "./LibEIP712Domain.sol";
+
+
+contract LibZeroExTransaction is
+    LibEIP712Domain
+{
+    // Hash for the EIP712 0x transaction schema
+    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
+        "ZeroExTransaction(",
+        "uint256 salt,",
+        "address signerAddress,",
+        "bytes data",
+        ")"
+    ));
+
+    struct ZeroExTransaction {
+        uint256 salt;           // Arbitrary number to ensure uniqueness of transaction hash.
+        address signerAddress;  // Address of transaction signer.
+        bytes data;             // AbiV2 encoded calldata.
+    }
+
+    /// @dev Calculates the EIP712 hash of a 0x transaction using the domain separator of this contract.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @return EIP712 hash of the transaction with the domain separator of this contract.
+    function getTransactionHash(ZeroExTransaction memory transaction)
+        internal
+        view
+        returns (bytes32 transactionHash)
+    {
+        // Note: this transaction hash will differ from the hash produced by the Exchange contract because it utilizes a different domain hash.
+        transactionHash = hashEIP712Message(hashZeroExTransaction(transaction));
+        return transactionHash;
+    }
+
+    /// @dev Calculates EIP712 hash of the 0x transaction with no domain separator.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @return EIP712 hash of the transaction with no domain separator.
+    function hashZeroExTransaction(ZeroExTransaction memory transaction)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH;
+        bytes32 dataHash = keccak256(transaction.data);
+        // TODO(abandeali1): optimize by loading from memory in assembly
+        uint256 salt = transaction.salt;
+        address signerAddress = transaction.signerAddress;
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encodePacked(
+        //     EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
+        //     transaction.salt,
+        //     uint256(transaction.signerAddress),
+        //     keccak256(transaction.data)
+        // ));
+
+        assembly {
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, schemaHash)                                                               // hash of schema
+            mstore(add(memPtr, 32), salt)                                                            // salt
+            mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff))  // signerAddress
+            mstore(add(memPtr, 96), dataHash)                                                        // hash of data
+
+            // Compute hash
+            result := keccak256(memPtr, 128)
+        }
+        return result;
+    }
+}

contracts/tec/contracts/src/mixins/MSignatureValidator.sol

@@ -0,0 +1,34 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+
+import "../interfaces/ISignatureValidator.sol";
+
+
+contract MSignatureValidator is
+    ISignatureValidator
+{
+    // Allowed signature types.
+    enum SignatureType {
+        Illegal,         // 0x00, default value
+        EIP712,          // 0x01
+        EthSign,         // 0x02
+        NSignatureTypes  // 0x03, number of signature types. Always leave at end.
+    }
+}

contracts/tec/contracts/src/mixins/MTECApprovalVerifier.sol

@@ -0,0 +1,36 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "../interfaces/ITECApprovalVerifier.sol";
+
+
+contract MTECApprovalVerifier is
+    ITECApprovalVerifier
+{
+    /// @dev Decodes the orders from Exchange calldata representing any fill method.
+    /// @param data Exchange calldata representing a fill method.
+    /// @return The orders from the Exchange calldata.
+    function decodeFillDataOrders(bytes memory data)
+        internal
+        pure
+        returns (LibOrder.Order[] memory orders);
+}

contracts/tec/contracts/test/TestLibs.sol

@@ -0,0 +1,53 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "../src/libs/LibTECApproval.sol";
+import "../src/libs/LibZeroExTransaction.sol";
+
+
+contract TestLibs is
+    LibTECApproval,
+    LibZeroExTransaction
+{
+    /// @dev Calculated the EIP712 hash of the TEC approval mesasage using the domain separator of this contract.
+    /// @param approval TEC approval message containing the transaction hash, transaction signature, and expiration of the approval.
+    /// @return EIP712 hash of the TEC approval message with the domain separator of this contract.
+    function publicGetTECApprovalHash(TECApproval memory approval)
+        public
+        view
+        returns (bytes32 approvalHash)
+    {
+        approvalHash = getTECApprovalHash(approval);
+        return approvalHash;
+    }
+
+    /// @dev Calculates the EIP712 hash of a 0x transaction using the domain separator of this contract.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @return EIP712 hash of the transaction with the domain separator of this contract.
+    function publicGetTransactionHash(ZeroExTransaction memory transaction)
+        public
+        view
+        returns (bytes32 transactionHash)
+    {
+        transactionHash = getTransactionHash(transaction);
+        return transactionHash;
+    }
+}

contracts/tec/contracts/test/TestMixins.sol

@@ -0,0 +1,30 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity 0.5.3;
+pragma experimental "ABIEncoderV2";
+
+import "../src/MixinSignatureValidator.sol";
+import "../src/MixinTECApprovalVerifier.sol";
+
+
+// solhint-disable no-empty-blocks
+contract TestMixins is
+    MixinSignatureValidator,
+    MixinTECApprovalVerifier
+{}

contracts/tec/package.json

@@ -0,0 +1,88 @@
+{
+    "name": "@0x/contracts-tec",
+    "version": "0.0.2",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Smart contract extensions of 0x protocol",
+    "main": "lib/src/index.js",
+    "directories": {
+        "test": "test"
+    },
+    "scripts": {
+        "build": "yarn pre_build && tsc -b",
+        "build:ci": "yarn build",
+        "pre_build": "run-s compile generate_contract_wrappers",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
+        "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
+        "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
+        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
+        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
+        "compile": "sol-compiler",
+        "watch": "sol-compiler -w",
+        "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
+        "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
+        "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "coverage:report:text": "istanbul report text",
+        "coverage:report:html": "istanbul report html && open coverage/index.html",
+        "profiler:report:html": "istanbul report html && open coverage/index.html",
+        "coverage:report:lcov": "istanbul report lcov",
+        "test:circleci": "yarn test",
+        "contracts:gen": "contracts-gen",
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "./generated-artifacts/@(IExchange|TEC|TestLibs|TestMixins).json",
+        "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "license": "Apache-2.0",
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
+    "devDependencies": {
+        "@0x/abi-gen": "^2.0.5",
+        "@0x/contracts-gen": "^1.0.4",
+        "@0x/contracts-test-utils": "^3.0.6",
+        "@0x/dev-utils": "^2.1.2",
+        "@0x/sol-compiler": "^3.1.1",
+        "@0x/tslint-config": "^3.0.0",
+        "@types/lodash": "4.14.104",
+        "@types/node": "*",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^3.0.0",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.1.0",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "solhint": "^1.4.1",
+        "tslint": "5.11.0",
+        "typescript": "3.0.1"
+    },
+    "dependencies": {
+        "@0x/base-contract": "^5.0.1",
+        "@0x/contracts-asset-proxy": "^1.0.7",
+        "@0x/contracts-erc20": "^1.0.7",
+        "@0x/contracts-exchange": "1.0.2",
+        "@0x/contracts-exchange-libs": "^1.1.1",
+        "@0x/contracts-utils": "^2.0.6",
+        "@0x/order-utils": "^7.0.1",
+        "@0x/types": "^2.1.1",
+        "@0x/typescript-typings": "^4.1.0",
+        "@0x/utils": "^4.2.1",
+        "@0x/web3-wrapper": "^6.0.1",
+        "ethereum-types": "^2.1.0",
+        "ethereumjs-util": "^5.1.1",
+        "lodash": "^4.17.11"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}

contracts/tec/src/artifacts.ts

@@ -0,0 +1,15 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+import { ContractArtifact } from 'ethereum-types';
+
+import * as TEC from '../generated-artifacts/TEC.json';
+import * as TestLibs from '../generated-artifacts/TestLibs.json';
+import * as TestMixins from '../generated-artifacts/TestMixins.json';
+export const artifacts = {
+    TEC: TEC as ContractArtifact,
+    TestLibs: TestLibs as ContractArtifact,
+    TestMixins: TestMixins as ContractArtifact,
+};

contracts/tec/src/index.ts

@@ -0,0 +1,3 @@
+export * from './artifacts';
+export * from './wrappers';
+export * from '../test/utils';

contracts/tec/src/wrappers.ts

@@ -0,0 +1,8 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+export * from '../generated-wrappers/tec';
+export * from '../generated-wrappers/test_libs';
+export * from '../generated-wrappers/test_mixins';

contracts/tec/test/global_hooks.ts

@@ -0,0 +1,17 @@
+import { env, EnvVars } from '@0x/dev-utils';
+
+import { coverage, profiler, provider } from '@0x/contracts-test-utils';
+before('start web3 provider', () => {
+    provider.start();
+});
+after('generate coverage report', async () => {
+    if (env.parseBoolean(EnvVars.SolidityCoverage)) {
+        const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
+        await coverageSubprovider.writeCoverageAsync();
+    }
+    if (env.parseBoolean(EnvVars.SolidityProfiler)) {
+        const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+        await profilerSubprovider.writeProfilerOutputAsync();
+    }
+    provider.stop();
+});

contracts/tec/test/libs.ts

@@ -0,0 +1,65 @@
+import { chaiSetup, constants, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+
+import { artifacts, hashUtils, TestLibsContract } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Libs tests', () => {
+    let testLibs: TestLibsContract;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        testLibs = await TestLibsContract.deployFrom0xArtifactAsync(artifacts.TestLibs, provider, txDefaults);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('getTransactionHash', () => {
+        it('should return the correct transaction hash', async () => {
+            const tx = {
+                verifyingContractAddress: testLibs.address,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+            };
+            const expectedTxHash = hashUtils.getTransactionHashHex(tx);
+            const txHash = await testLibs.publicGetTransactionHash.callAsync(tx);
+            expect(expectedTxHash).to.eq(txHash);
+        });
+    });
+
+    describe('getApprovalHash', () => {
+        it('should return the correct approval hash', async () => {
+            const signedTx = {
+                verifyingContractAddress: testLibs.address,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+                signature: '0x5678',
+            };
+            const approvalExpirationTimeSeconds = new BigNumber(0);
+            const approval = {
+                transactionHash: hashUtils.getTransactionHashHex(signedTx),
+                transactionSignature: signedTx.signature,
+                approvalExpirationTimeSeconds,
+            };
+            const expectedApprovalHash = hashUtils.getApprovalHashHex(signedTx, approvalExpirationTimeSeconds);
+            const approvalHash = await testLibs.publicGetTECApprovalHash.callAsync(approval);
+            expect(expectedApprovalHash).to.eq(approvalHash);
+        });
+    });
+});

contracts/tec/test/mixins.ts

@@ -0,0 +1,714 @@
+import {
+    chaiSetup,
+    constants as devConstants,
+    expectContractCallFailedAsync,
+    getLatestBlockTimestampAsync,
+    provider,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { RevertReason, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import * as ethUtil from 'ethereumjs-util';
+
+import {
+    ApprovalFactory,
+    artifacts,
+    constants,
+    exchangeDataEncoder,
+    hashUtils,
+    TECSignatureType,
+    TECTransactionFactory,
+    TestMixinsContract,
+} from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Mixins tests', () => {
+    let transactionSignerAddress: string;
+    let approvalSignerAddress1: string;
+    let approvalSignerAddress2: string;
+    let mixins: TestMixinsContract;
+    let transactionFactory: TECTransactionFactory;
+    let approvalFactory1: ApprovalFactory;
+    let approvalFactory2: ApprovalFactory;
+    let defaultOrder: SignedOrder;
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        mixins = await TestMixinsContract.deployFrom0xArtifactAsync(artifacts.TestMixins, provider, txDefaults);
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        [transactionSignerAddress, approvalSignerAddress1, approvalSignerAddress2] = accounts.slice(0, 3);
+        defaultOrder = {
+            exchangeAddress: devConstants.NULL_ADDRESS,
+            makerAddress: devConstants.NULL_ADDRESS,
+            takerAddress: devConstants.NULL_ADDRESS,
+            senderAddress: mixins.address,
+            feeRecipientAddress: approvalSignerAddress1,
+            makerAssetData: devConstants.NULL_BYTES,
+            takerAssetData: devConstants.NULL_BYTES,
+            makerAssetAmount: devConstants.ZERO_AMOUNT,
+            takerAssetAmount: devConstants.ZERO_AMOUNT,
+            makerFee: devConstants.ZERO_AMOUNT,
+            takerFee: devConstants.ZERO_AMOUNT,
+            expirationTimeSeconds: devConstants.ZERO_AMOUNT,
+            salt: devConstants.ZERO_AMOUNT,
+            signature: devConstants.NULL_BYTES,
+        };
+        const transactionSignerPrivateKey =
+            devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(transactionSignerAddress)];
+        const approvalSignerPrivateKey1 = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(approvalSignerAddress1)];
+        const approvalSignerPrivateKey2 = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(approvalSignerAddress2)];
+        transactionFactory = new TECTransactionFactory(transactionSignerPrivateKey, mixins.address);
+        approvalFactory1 = new ApprovalFactory(approvalSignerPrivateKey1, mixins.address);
+        approvalFactory2 = new ApprovalFactory(approvalSignerPrivateKey2, mixins.address);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('getSignerAddress', () => {
+        it('should return the correct address using the EthSign signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTECTransaction(data, TECSignatureType.EthSign);
+            const transactionHash = hashUtils.getTransactionHashHex(transaction);
+            const signerAddress = await mixins.getSignerAddress.callAsync(transactionHash, transaction.signature);
+            expect(transaction.signerAddress).to.eq(signerAddress);
+        });
+        it('should return the correct address using the EIP712 signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTECTransaction(data, TECSignatureType.EIP712);
+            const transactionHash = hashUtils.getTransactionHashHex(transaction);
+            const signerAddress = await mixins.getSignerAddress.callAsync(transactionHash, transaction.signature);
+            expect(transaction.signerAddress).to.eq(signerAddress);
+        });
+        it('should revert with with the Illegal signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTECTransaction(data);
+            const illegalSignatureByte = ethUtil.toBuffer(TECSignatureType.Illegal).toString('hex');
+            transaction.signature = `${transaction.signature.slice(
+                0,
+                transaction.signature.length - 2,
+            )}${illegalSignatureByte}`;
+            const transactionHash = hashUtils.getTransactionHashHex(transaction);
+            expectContractCallFailedAsync(
+                mixins.getSignerAddress.callAsync(transactionHash, transaction.signature),
+                RevertReason.SignatureIllegal,
+            );
+        });
+        it("should revert with with a signature type that doesn't exist", async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTECTransaction(data);
+            const invalidSignatureByte = '03';
+            transaction.signature = `${transaction.signature.slice(
+                0,
+                transaction.signature.length - 2,
+            )}${invalidSignatureByte}`;
+            const transactionHash = hashUtils.getTransactionHashHex(transaction);
+            expectContractCallFailedAsync(
+                mixins.getSignerAddress.callAsync(transactionHash, transaction.signature),
+                RevertReason.SignatureUnsupported,
+            );
+        });
+    });
+
+    describe('Single order approvals', () => {
+        for (const fnName of constants.SINGLE_FILL_FN_NAMES) {
+            it(`Should be successful: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=tx_signer, senderAddress=[null], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const order = {
+                    ...defaultOrder,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                };
+                const orders = [order];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: approvalSignerAddress1 },
+                );
+                await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                    from: approvalSignerAddress1,
+                });
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[approver1], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: approvalSignerAddress1 },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: approvalSignerAddress1 },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: approvalSignerAddress1 },
+                );
+                await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                    from: approvalSignerAddress1,
+                });
+            });
+            it(`Should revert: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[approver1], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName}, caller=approver2, senderAddress=[verifier], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+            });
+        }
+    });
+    describe('Batch order approvals', () => {
+        for (const fnName of [
+            ...constants.BATCH_FILL_FN_NAMES,
+            ...constants.MARKET_FILL_FN_NAMES,
+            constants.MATCH_ORDERS,
+        ]) {
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[null,null], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder].map(order => ({
+                    ...order,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                }));
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[null,null], feeRecipient=[approver1,approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder].map(order => ({
+                    ...order,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                }));
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                    from: transactionSignerAddress,
+                });
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,null], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, senderAddress: devConstants.NULL_ADDRESS }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver2], approval_sig=[approver1,approver2], expiration=[valid,valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                    [approval1.signature, approval2.signature],
+                    { from: transactionSignerAddress },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                    [approval1.signature, approval2.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: approvalSignerAddress1 },
+                );
+                await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                    from: approvalSignerAddress1,
+                });
+            });
+            it(`Should be successful: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver2], approval_sig=[approver2], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await mixins.assertValidTransactionOrdersApproval.callAsync(
+                    transaction,
+                    orders,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval2.signature],
+                    { from: approvalSignerAddress1 },
+                );
+                await mixins.assertValidTECApprovals.callAsync(
+                    transaction,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval2.signature],
+                    { from: approvalSignerAddress1 },
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                        from: transactionSignerAddress,
+                    }),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid,invalid], expiration=[valid,valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const approvalSignature2 = `${approval2.signature.slice(0, 4)}FFFFFFFF${approval2.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                        [approval1.signature, approvalSignature2],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                        [approval1.signature, approvalSignature2],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const approvalSignature2 = `${approval2.signature.slice(0, 4)}FFFFFFFF${approval2.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approvalSignature2],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approvalSignature2],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid,valid], expiration=[valid,invalid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds1 = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approvalExpirationTimeSeconds2 = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds1);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds2);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds1, approvalExpirationTimeSeconds2],
+                        [approval1.signature, approval2.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds1, approvalExpirationTimeSeconds2],
+                        [approval1.signature, approval2.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval2.signature],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval2.signature],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver2, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[valid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTECTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                expectContractCallFailedAsync(
+                    mixins.assertValidTransactionOrdersApproval.callAsync(
+                        transaction,
+                        orders,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval1.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidTECApprovals.callAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval1.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+            });
+        }
+    });
+    describe('cancels', () => {
+        it('should allow the tx signer to call `cancelOrders` without approval', async () => {
+            const orders = [defaultOrder];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS, orders);
+            const transaction = transactionFactory.newSignedTECTransaction(data);
+            await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                from: transactionSignerAddress,
+            });
+        });
+        it('should allow the tx signer to call `batchCancelOrders` without approval', async () => {
+            const orders = [defaultOrder, defaultOrder];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.BATCH_CANCEL_ORDERS, orders);
+            const transaction = transactionFactory.newSignedTECTransaction(data);
+            await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                from: transactionSignerAddress,
+            });
+        });
+        it('should allow the tx signer to call `cancelOrdersUpTo` without approval', async () => {
+            const orders: SignedOrder[] = [];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS_UP_TO, orders);
+            const transaction = transactionFactory.newSignedTECTransaction(data);
+            await mixins.assertValidTECApprovals.callAsync(transaction, transaction.signature, [], [], {
+                from: transactionSignerAddress,
+            });
+        });
+    });
+});
+// tslint:disable:max-file-line-count

contracts/tec/test/tec.ts

@@ -0,0 +1,449 @@
+import { DummyERC20TokenContract, ERC20ProxyContract, ERC20Wrapper } from '@0x/contracts-asset-proxy';
+import {
+    artifacts as exchangeArtifacts,
+    ExchangeCancelEventArgs,
+    ExchangeCancelUpToEventArgs,
+    ExchangeContract,
+    ExchangeFillEventArgs,
+} from '@0x/contracts-exchange';
+import {
+    chaiSetup,
+    constants as devConstants,
+    expectTransactionFailedAsync,
+    getLatestBlockTimestampAsync,
+    OrderFactory,
+    provider,
+    TransactionFactory,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
+import { RevertReason, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+
+import { ApprovalFactory, artifacts, constants, exchangeDataEncoder, TECContract } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+web3Wrapper.abiDecoder.addABI(exchangeArtifacts.Exchange.compilerOutput.abi);
+// tslint:disable:no-unnecessary-type-assertion
+describe('TEC tests', () => {
+    let makerAddress: string;
+    let owner: string;
+    let takerAddress: string;
+    let feeRecipientAddress: string;
+
+    let erc20Proxy: ERC20ProxyContract;
+    let erc20TokenA: DummyERC20TokenContract;
+    let erc20TokenB: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
+    let tecContract: TECContract;
+    let exchange: ExchangeContract;
+
+    let erc20Wrapper: ERC20Wrapper;
+    let orderFactory: OrderFactory;
+    let takerTransactionFactory: TransactionFactory;
+    let makerTransactionFactory: TransactionFactory;
+    let approvalFactory: ApprovalFactory;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        const usedAddresses = ([owner, makerAddress, takerAddress, feeRecipientAddress] = accounts.slice(0, 4));
+
+        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
+        const numDummyErc20ToDeploy = 3;
+        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
+            numDummyErc20ToDeploy,
+            devConstants.DUMMY_TOKEN_DECIMALS,
+        );
+        await erc20Wrapper.setBalancesAndAllowancesAsync();
+
+        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
+            exchangeArtifacts.Exchange,
+            provider,
+            txDefaults,
+            assetDataUtils.encodeERC20AssetData(zrxToken.address),
+        );
+
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: owner }),
+            devConstants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await exchange.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
+            devConstants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        tecContract = await TECContract.deployFrom0xArtifactAsync(
+            artifacts.TEC,
+            provider,
+            txDefaults,
+            exchange.address,
+        );
+
+        // Configure order defaults
+        const defaultOrderParams = {
+            ...devConstants.STATIC_ORDER_PARAMS,
+            exchangeAddress: exchange.address,
+            senderAddress: tecContract.address,
+            makerAddress,
+            feeRecipientAddress,
+            makerAssetData: assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+            takerAssetData: assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+        };
+        const makerPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
+        const takerPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(takerAddress)];
+        const feeRecipientPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(feeRecipientAddress)];
+        orderFactory = new OrderFactory(makerPrivateKey, defaultOrderParams);
+        makerTransactionFactory = new TransactionFactory(makerPrivateKey, exchange.address);
+        takerTransactionFactory = new TransactionFactory(takerPrivateKey, exchange.address);
+        approvalFactory = new ApprovalFactory(feeRecipientPrivateKey, tecContract.address);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('single order fills', () => {
+        for (const fnName of constants.SINGLE_FILL_FN_NAMES) {
+            it(`${fnName} should fill the order with a signed approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(1);
+                const fillLogArgs = (fillLogs[0] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                expect(fillLogArgs.senderAddress).to.eq(tecContract.address);
+                expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(fillLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+                expect(fillLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+                expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(orders[0].makerAssetAmount);
+                expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(orders[0].takerAssetAmount);
+                expect(fillLogArgs.makerFeePaid).to.bignumber.eq(orders[0].makerFee);
+                expect(fillLogArgs.takerFeePaid).to.bignumber.eq(orders[0].takerFee);
+                expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+            });
+            it(`${fnName} should fill the order if called by approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: feeRecipientAddress },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(1);
+                const fillLogArgs = (fillLogs[0] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                expect(fillLogArgs.senderAddress).to.eq(tecContract.address);
+                expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(fillLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+                expect(fillLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+                expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(orders[0].makerAssetAmount);
+                expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(orders[0].takerAssetAmount);
+                expect(fillLogArgs.makerFeePaid).to.bignumber.eq(orders[0].makerFee);
+                expect(fillLogArgs.takerFeePaid).to.bignumber.eq(orders[0].takerFee);
+                expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+            });
+            it(`${fnName} should revert with no approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(transaction, transaction.signature, [], [], {
+                        from: takerAddress,
+                        gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS,
+                    }),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an invalid approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an expired approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`${fnName} should revert if not called by tx signer or approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: owner },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+            });
+        }
+    });
+    describe('batch order fills', () => {
+        for (const fnName of [...constants.MARKET_FILL_FN_NAMES, ...constants.BATCH_FILL_FN_NAMES]) {
+            it(`${fnName} should fill the orders with a signed approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress, gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(orders.length);
+                orders.forEach((order, index) => {
+                    const fillLogArgs = (fillLogs[index] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                    expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                    expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                    expect(fillLogArgs.senderAddress).to.eq(tecContract.address);
+                    expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                    expect(fillLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                    expect(fillLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                    expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(order.makerAssetAmount);
+                    expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(order.takerAssetAmount);
+                    expect(fillLogArgs.makerFeePaid).to.bignumber.eq(order.makerFee);
+                    expect(fillLogArgs.takerFeePaid).to.bignumber.eq(order.takerFee);
+                    expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+                });
+            });
+            it(`${fnName} should fill the orders if called by approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: feeRecipientAddress, gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(orders.length);
+                orders.forEach((order, index) => {
+                    const fillLogArgs = (fillLogs[index] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                    expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                    expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                    expect(fillLogArgs.senderAddress).to.eq(tecContract.address);
+                    expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                    expect(fillLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                    expect(fillLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                    expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(order.makerAssetAmount);
+                    expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(order.takerAssetAmount);
+                    expect(fillLogArgs.makerFeePaid).to.bignumber.eq(order.makerFee);
+                    expect(fillLogArgs.takerFeePaid).to.bignumber.eq(order.takerFee);
+                    expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+                });
+            });
+            it(`${fnName} should revert with an invalid approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an expired approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`${fnName} should revert if not called by tx signer or approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(transaction, approvalExpirationTimeSeconds);
+                await expectTransactionFailedAsync(
+                    tecContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: owner },
+                    ),
+                    RevertReason.InvalidSender,
+                );
+            });
+        }
+    });
+    describe('cancels', () => {
+        it('cancelOrder call should be successful without an approval', async () => {
+            const orders = [await orderFactory.newSignedOrderAsync()];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await tecContract.executeTransaction.sendTransactionAsync(transaction, transaction.signature, [], [], {
+                    from: makerAddress,
+                }),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelEventArgs>).event === 'Cancel',
+            );
+            expect(cancelLogs.length).to.eq(1);
+            const cancelLogArgs = (cancelLogs[0] as LogWithDecodedArgs<ExchangeCancelEventArgs>).args;
+            expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+            expect(cancelLogArgs.senderAddress).to.eq(tecContract.address);
+            expect(cancelLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+            expect(cancelLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+            expect(cancelLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+            expect(cancelLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+        });
+        it('batchCancelOrders call should be successful without an approval', async () => {
+            const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.BATCH_CANCEL_ORDERS, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await tecContract.executeTransaction.sendTransactionAsync(transaction, transaction.signature, [], [], {
+                    from: makerAddress,
+                }),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelEventArgs>).event === 'Cancel',
+            );
+            expect(cancelLogs.length).to.eq(orders.length);
+            orders.forEach((order, index) => {
+                const cancelLogArgs = (cancelLogs[index] as LogWithDecodedArgs<ExchangeCancelEventArgs>).args;
+                expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+                expect(cancelLogArgs.senderAddress).to.eq(tecContract.address);
+                expect(cancelLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(cancelLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                expect(cancelLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                expect(cancelLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+            });
+        });
+        it('cancelOrdersUpTo call should be successful without an approval', async () => {
+            const orders: SignedOrder[] = [];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS_UP_TO, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await tecContract.executeTransaction.sendTransactionAsync(transaction, transaction.signature, [], [], {
+                    from: makerAddress,
+                }),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelUpToEventArgs>).event === 'CancelUpTo',
+            );
+            expect(cancelLogs.length).to.eq(1);
+            const cancelLogArgs = (cancelLogs[0] as LogWithDecodedArgs<ExchangeCancelUpToEventArgs>).args;
+            expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+            expect(cancelLogArgs.senderAddress).to.eq(tecContract.address);
+            expect(cancelLogArgs.orderEpoch).to.bignumber.eq(new BigNumber(1));
+        });
+    });
+});

contracts/tec/test/utils/approval_factory.ts

@@ -0,0 +1,32 @@
+import { SignedZeroExTransaction } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as ethUtil from 'ethereumjs-util';
+
+import { hashUtils, SignedTECApproval, signingUtils, TECSignatureType } from './index';
+
+export class ApprovalFactory {
+    private readonly _privateKey: Buffer;
+    private readonly _verifyingContractAddress: string;
+    constructor(privateKey: Buffer, verifyingContractAddress: string) {
+        this._privateKey = privateKey;
+        this._verifyingContractAddress = verifyingContractAddress;
+    }
+    public newSignedApproval(
+        transaction: SignedZeroExTransaction,
+        approvalExpirationTimeSeconds: BigNumber,
+        signatureType: TECSignatureType = TECSignatureType.EthSign,
+    ): SignedTECApproval {
+        const tecTransaction = {
+            ...transaction,
+            verifyingContractAddress: this._verifyingContractAddress,
+        };
+        const approvalHashBuff = hashUtils.getApprovalHashBuffer(tecTransaction, approvalExpirationTimeSeconds);
+        const signatureBuff = signingUtils.signMessage(approvalHashBuff, this._privateKey, signatureType);
+        const signedApproval = {
+            transaction: tecTransaction,
+            approvalExpirationTimeSeconds,
+            signature: ethUtil.addHexPrefix(signatureBuff.toString('hex')),
+        };
+        return signedApproval;
+    }
+}

contracts/tec/test/utils/constants.ts

@@ -0,0 +1,22 @@
+import { BigNumber } from '@0x/utils';
+
+export const constants = {
+    TEC_DOMAIN_NAME: '0x Protocol Trade Execution Coordinator',
+    TEC_DOMAIN_VERSION: '1.0.0',
+    TEC_APPROVAL_SCHEMA: {
+        name: 'TECApproval',
+        parameters: [
+            { name: 'transactionHash', type: 'bytes32' },
+            { name: 'transactionSignature', type: 'bytes' },
+            { name: 'approvalExpirationTimeSeconds', type: 'uint256' },
+        ],
+    },
+    SINGLE_FILL_FN_NAMES: ['fillOrder', 'fillOrKillOrder', 'fillOrderNoThrow'],
+    BATCH_FILL_FN_NAMES: ['batchFillOrders', 'batchFillOrKillOrders', 'batchFillOrdersNoThrow'],
+    MARKET_FILL_FN_NAMES: ['marketBuyOrders', 'marketBuyOrdersNoThrow', 'marketSellOrders', 'marketSellOrdersNoThrow'],
+    MATCH_ORDERS: 'matchOrders',
+    CANCEL_ORDERS: 'cancelOrders',
+    BATCH_CANCEL_ORDERS: 'batchCancelOrders',
+    CANCEL_ORDERS_UP_TO: 'cancelOrdersUpTo',
+    TIME_BUFFER: new BigNumber(1000),
+};

contracts/tec/test/utils/exchange_data_encoder.ts

@@ -0,0 +1,51 @@
+import { artifacts, IExchangeContract } from '@0x/contracts-exchange';
+import { constants as devConstants, provider } from '@0x/contracts-test-utils';
+import { SignedOrder } from '@0x/types';
+
+import { constants } from './index';
+
+export const exchangeDataEncoder = {
+    encodeOrdersToExchangeData(fnName: string, orders: SignedOrder[]): string {
+        const exchangeInstance = new IExchangeContract(
+            artifacts.IExchange.compilerOutput.abi,
+            devConstants.NULL_ADDRESS,
+            provider,
+        );
+        let data;
+        if (constants.SINGLE_FILL_FN_NAMES.indexOf(fnName) !== -1) {
+            data = (exchangeInstance as any)[fnName].getABIEncodedTransactionData(
+                orders[0],
+                orders[0].takerAssetAmount,
+                orders[0].signature,
+            );
+        } else if (constants.BATCH_FILL_FN_NAMES.indexOf(fnName) !== -1) {
+            data = (exchangeInstance as any)[fnName].getABIEncodedTransactionData(
+                orders,
+                orders.map(order => order.takerAssetAmount),
+                orders.map(order => order.signature),
+            );
+        } else if (constants.MARKET_FILL_FN_NAMES.indexOf(fnName) !== -1) {
+            data = (exchangeInstance as any)[fnName].getABIEncodedTransactionData(
+                orders,
+                orders.map(order => order.takerAssetAmount).reduce((prev, curr) => prev.plus(curr)),
+                orders.map(order => order.signature),
+            );
+        } else if (fnName === constants.MATCH_ORDERS) {
+            data = exchangeInstance.matchOrders.getABIEncodedTransactionData(
+                orders[0],
+                orders[1],
+                orders[0].signature,
+                orders[1].signature,
+            );
+        } else if (fnName === constants.CANCEL_ORDERS) {
+            data = exchangeInstance.cancelOrder.getABIEncodedTransactionData(orders[0]);
+        } else if (fnName === constants.BATCH_CANCEL_ORDERS) {
+            data = exchangeInstance.batchCancelOrders.getABIEncodedTransactionData(orders);
+        } else if (fnName === constants.CANCEL_ORDERS_UP_TO) {
+            data = exchangeInstance.cancelOrdersUpTo.getABIEncodedTransactionData(devConstants.ZERO_AMOUNT);
+        } else {
+            throw new Error(`Error: ${fnName} not a supported function`);
+        }
+        return data;
+    },
+};

contracts/tec/test/utils/hash_utils.ts

@@ -0,0 +1,61 @@
+import { eip712Utils } from '@0x/order-utils';
+import { constants as orderUtilsConstants } from '@0x/order-utils/lib/src/constants';
+import { SignedZeroExTransaction, ZeroExTransaction } from '@0x/types';
+import { BigNumber, signTypedDataUtils } from '@0x/utils';
+import * as _ from 'lodash';
+
+import { constants } from './index';
+
+export const hashUtils = {
+    getApprovalHashBuffer(transaction: SignedZeroExTransaction, approvalExpirationTimeSeconds: BigNumber): Buffer {
+        const domain = {
+            name: constants.TEC_DOMAIN_NAME,
+            version: constants.TEC_DOMAIN_VERSION,
+            verifyingContractAddress: transaction.verifyingContractAddress,
+        };
+        const transactionHash = hashUtils.getTransactionHashHex(transaction);
+        const approval = {
+            transactionHash,
+            transactionSignature: transaction.signature,
+            approvalExpirationTimeSeconds: approvalExpirationTimeSeconds.toString(),
+        };
+        const typedData = eip712Utils.createTypedData(
+            constants.TEC_APPROVAL_SCHEMA.name,
+            {
+                TECApproval: constants.TEC_APPROVAL_SCHEMA.parameters,
+            },
+            approval,
+            domain,
+        );
+        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
+        return hashBuffer;
+    },
+    getApprovalHashHex(transaction: SignedZeroExTransaction, approvalExpirationTimeSeconds: BigNumber): string {
+        const hashHex = `0x${hashUtils
+            .getApprovalHashBuffer(transaction, approvalExpirationTimeSeconds)
+            .toString('hex')}`;
+        return hashHex;
+    },
+    getTransactionHashBuffer(transaction: ZeroExTransaction | SignedZeroExTransaction): Buffer {
+        const domain = {
+            name: constants.TEC_DOMAIN_NAME,
+            version: constants.TEC_DOMAIN_VERSION,
+            verifyingContractAddress: transaction.verifyingContractAddress,
+        };
+        const normalizedTransaction = _.mapValues(transaction, value => {
+            return !_.isString(value) ? value.toString() : value;
+        });
+        const typedData = eip712Utils.createTypedData(
+            orderUtilsConstants.EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.name,
+            { ZeroExTransaction: orderUtilsConstants.EXCHANGE_ZEROEX_TRANSACTION_SCHEMA.parameters },
+            normalizedTransaction,
+            domain,
+        );
+        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
+        return hashBuffer;
+    },
+    getTransactionHashHex(transaction: ZeroExTransaction | SignedZeroExTransaction): string {
+        const hashHex = `0x${hashUtils.getTransactionHashBuffer(transaction).toString('hex')}`;
+        return hashHex;
+    },
+};

contracts/tec/test/utils/index.ts

@@ -0,0 +1,7 @@
+export { hashUtils } from './hash_utils';
+export { signingUtils } from './signing_utils';
+export { TECTransactionFactory } from './tec_transaction_factory';
+export { ApprovalFactory } from './approval_factory';
+export { constants } from './constants';
+export { exchangeDataEncoder } from './exchange_data_encoder';
+export * from './types';

contracts/tec/test/utils/signing_utils.ts

@@ -0,0 +1,30 @@
+import * as ethUtil from 'ethereumjs-util';
+
+import { TECSignatureType } from './types';
+
+export const signingUtils = {
+    signMessage(message: Buffer, privateKey: Buffer, signatureType: TECSignatureType): Buffer {
+        if (signatureType === TECSignatureType.EthSign) {
+            const prefixedMessage = ethUtil.hashPersonalMessage(message);
+            const ecSignature = ethUtil.ecsign(prefixedMessage, privateKey);
+            const signature = Buffer.concat([
+                ethUtil.toBuffer(ecSignature.v),
+                ecSignature.r,
+                ecSignature.s,
+                ethUtil.toBuffer(signatureType),
+            ]);
+            return signature;
+        } else if (signatureType === TECSignatureType.EIP712) {
+            const ecSignature = ethUtil.ecsign(message, privateKey);
+            const signature = Buffer.concat([
+                ethUtil.toBuffer(ecSignature.v),
+                ecSignature.r,
+                ecSignature.s,
+                ethUtil.toBuffer(signatureType),
+            ]);
+            return signature;
+        } else {
+            throw new Error(`${signatureType} is not a valid signature type`);
+        }
+    },
+};