Publish

- 0x.js@1.0.4
 - @0xproject/abi-gen@1.0.9
 - @0xproject/assert@1.0.9
 - @0xproject/base-contract@2.0.3
 - @0xproject/connect@2.0.2
 - @0xproject/contract-wrappers@1.0.4
 - contracts@2.1.45
 - @0xproject/dev-utils@1.0.8
 - ethereum-types@1.0.7
 - @0xproject/fill-scenarios@1.0.3
 - @0xproject/forwarder-helper@1.0.4
 - @0xproject/json-schemas@1.0.2
 - @0xproject/metacoin@0.0.19
 - @0xproject/migrations@1.0.10
 - @0xproject/monorepo-scripts@1.0.9
 - @0xproject/order-utils@1.0.3
 - @0xproject/order-watcher@1.0.4
 - @0xproject/react-docs@1.0.9
 - @0xproject/react-shared@1.0.10
 - @0xproject/sol-compiler@1.1.3
 - @0xproject/sol-cov@2.1.3
 - @0xproject/sol-resolver@1.0.9
 - @0xproject/sra-report@1.0.9
 - @0xproject/sra-spec@1.0.2
 - @0xproject/subproviders@2.0.3
 - @0xproject/testnet-faucets@1.0.47
 - @0xproject/types@1.0.2
 - @0xproject/typescript-typings@2.0.1
 - @0xproject/utils@1.0.9
 - @0xproject/web3-wrapper@2.0.3
 - @0xproject/website@0.0.50

.circleci/config.yml

@@ -2,6 +2,7 @@ version: 2
 
 jobs:
   build:
+    resource_class: medium+
     docker:
       - image: circleci/node:9
     environment:
@@ -60,6 +61,7 @@ jobs:
       # initialized
       - run: sleep 10 && TEST_PROVIDER=geth yarn wsrun test contracts
   test-publish:
+    resource_class: medium+
     docker:
       - image: circleci/node:9
       - image: verdaccio/verdaccio

.gitignore

@@ -88,7 +88,7 @@ packages/0x.js/src/artifacts/
 packages/order-utils/src/artifacts/
 
 # unstable generated contract artifacts:
-packages/migrations/artifacts/2.0.0/
+packages/migrations/artifacts/development/
 
 # generated contract watcher
 packages/0x.js/src/generated_contract_wrappers/
@@ -99,8 +99,9 @@ packages/fill-scenarios/src/generated_contract_wrappers/
 packages/order-watcher/src/generated_contract_wrappers/
 packages/order-utils/src/generated_contract_wrappers/
 packages/migrations/src/1.0.0/contract_wrappers
+packages/migrations/src/2.0.0-testnet/contract_wrappers
 packages/migrations/src/2.0.0/contract_wrappers
-packages/migrations/src/2.0.0-beta-testnet/contract_wrappers
+packages/migrations/src/development/contract_wrappers
 
 # solc-bin in sol-compiler
 packages/sol-compiler/solc_bin/

.prettierignore

@@ -8,8 +8,8 @@ lib
 /packages/order-watcher/src/generated_contract_wrappers/
 /packages/order-utils/src/generated_contract_wrappers/
 /packages/migrations/src/1.0.0/contract_wrappers
+/packages/migrations/src/2.0.0-testnet/contract_wrappers
 /packages/migrations/src/2.0.0/contract_wrappers
-/packages/migrations/src/2.0.0-beta-testnet/contract_wrappers
 /packages/0x.js/src/artifacts
 /packages/contracts/src/artifacts
 /packages/contract-wrappers/src/artifacts
@@ -19,7 +19,9 @@ lib
 /packages/contract-wrappers/test/artifacts
 /packages/order-watcher/test/artifacts
 /packages/migrations/artifacts/1.0.0
+/packages/migrations/artifacts/2.0.0-testnet
 /packages/migrations/artifacts/2.0.0
-/packages/migrations/artifacts/2.0.0-beta-testnet
+/packages/migrations/artifacts/development
 package.json
 scripts/postpublish_utils.js
+packages/sol-cov/test/fixtures/artifacts

package.json

@@ -23,10 +23,11 @@
         "install:all": "yarn install",
         "wsrun": "wsrun",
         "lerna": "lerna",
-        "watch": "wsrun watch_without_deps $PKG --fast-exit -r --stages --done-criteria='complete|successfully'",
         "build": "wsrun build $PKG --fast-exit -r --stages",
         "build:no_website": "wsrun build $PKG --fast-exit -r --stages --exclude @0xproject/website",
         "build:monorepo_scripts": "PKG=@0xproject/monorepo-scripts yarn build",
+        "build:ts": "tsc -b",
+        "watch:ts": "tsc -b -w",
         "clean": "wsrun clean $PKG --fast-exit -r --parallel",
         "remove_node_modules": "lerna clean --yes; rm -rf node_modules",
         "rebuild": "run-s clean build",
@@ -51,6 +52,7 @@
         "npm-run-all": "^4.1.2",
         "prettier": "^1.11.1",
         "source-map-support": "^0.5.6",
+        "typescript": "3.0.1",
         "wsrun": "^2.2.0"
     },
     "resolutions": {

packages/0x.js/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "1.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.0.3",
+        "changes": [
+            {
+                "note": "Drastically reduce the bundle size by removing unused parts of included contract artifacts."
+            }
+        ],
+        "timestamp": 1537369748
+    },
+    {
+        "version": "1.0.2",
+        "changes": [
+            {
+                "note": "Add ZRX & WETH mainnet contract addresses into the included artifacts"
+            }
+        ],
+        "timestamp": 1537265493
+    },
+    {
+        "timestamp": 1536142250,
+        "version": "1.0.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "version": "1.0.1-rc.6",
         "changes": [

packages/0x.js/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.4 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v1.0.3 - _September 19, 2018_
+
+    * Drastically reduce the bundle size by removing unused parts of included contract artifacts.
+
+## v1.0.2 - _September 18, 2018_
+
+    * Add ZRX & WETH mainnet contract addresses into the included artifacts
+
+## v1.0.1 - _September 5, 2018_
+
+    * Dependencies updated
+
 ## v1.0.1-rc.6 - _August 27, 2018_
 
     * Fix missing `BlockParamLiteral` type import issue

packages/0x.js/README.md

@@ -1,6 +1,6 @@
 ## 0x.js
 
-A TypeScript/Javascript library for interacting with the 0x protocol.
+A TypeScript/Javascript library for interacting with the 0x protocol. It is a high level package which combines a number of underlying packages such as order-utils and order-watcher.
 
 ### Read the [Documentation](https://0xproject.com/docs/0x.js).
 
@@ -19,7 +19,14 @@ npm install 0x.js --save
 **Import**
 
 ```javascript
-import { ZeroEx } from '0x.js';
+import {
+    assetDataUtils,
+    BigNumber,
+    ContractWrappers,
+    generatePseudoRandomSalt,
+    orderHashUtils,
+    signatureUtils,
+} from '0x.js';
 ```
 
 If your project is in [TypeScript](https://www.typescriptlang.org/), add the following to your `tsconfig.json`:

packages/0x.js/package.json

@@ -1,6 +1,6 @@
 {
     "name": "0x.js",
-    "version": "1.0.1-rc.6",
+    "version": "1.0.4",
     "engines": {
         "node": ">=6.12"
     },
@@ -15,7 +15,6 @@
     "main": "lib/index.js",
     "types": "lib/index.d.ts",
     "scripts": {
-        "watch_without_deps": "tsc -w",
         "build": "yarn build:all",
         "build:all": "run-p build:umd:prod build:commonjs",
         "lint": "tslint --project . --exclude **/src/generated_contract_wrappers/**/*",
@@ -25,8 +24,8 @@
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
         "clean": "shx rm -rf _bundles lib test_temp src/generated_contract_wrappers generated_docs",
         "build:umd:prod": "NODE_ENV=production webpack",
-        "build:commonjs": "tsc",
-        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_FILES"
+        "build:commonjs": "tsc -b",
+        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES"
     },
     "config": {
         "postpublish": {
@@ -42,15 +41,16 @@
     },
     "license": "Apache-2.0",
     "devDependencies": {
-        "@0xproject/abi-gen": "^1.0.7",
-        "@0xproject/dev-utils": "^1.0.6",
-        "@0xproject/migrations": "^1.0.6",
-        "@0xproject/monorepo-scripts": "^1.0.7",
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/abi-gen": "^1.0.9",
+        "@0xproject/dev-utils": "^1.0.8",
+        "@0xproject/migrations": "^1.0.10",
+        "@0xproject/monorepo-scripts": "^1.0.9",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
-        "@types/node": "^8.0.53",
+        "@types/node": "*",
         "@types/sinon": "^2.2.2",
+        "@types/web3-provider-engine": "^14.0.0",
         "awesome-typescript-loader": "^3.1.3",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
@@ -73,17 +73,17 @@
         "webpack": "^3.1.0"
     },
     "dependencies": {
-        "@0xproject/assert": "^1.0.7",
-        "@0xproject/base-contract": "^2.0.1",
-        "@0xproject/contract-wrappers": "^1.0.1-rc.5",
-        "@0xproject/order-utils": "^1.0.1-rc.6",
-        "@0xproject/order-watcher": "^1.0.1-rc.5",
-        "@0xproject/subproviders": "^2.0.1",
-        "@0xproject/types": "^1.0.1-rc.6",
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
-        "@0xproject/web3-wrapper": "^2.0.1",
-        "ethereum-types": "^1.0.5",
+        "@0xproject/assert": "^1.0.9",
+        "@0xproject/base-contract": "^2.0.3",
+        "@0xproject/contract-wrappers": "^1.0.4",
+        "@0xproject/order-utils": "^1.0.3",
+        "@0xproject/order-watcher": "^1.0.4",
+        "@0xproject/subproviders": "^2.0.3",
+        "@0xproject/types": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
+        "@0xproject/web3-wrapper": "^2.0.3",
+        "ethereum-types": "^1.0.7",
         "ethers": "3.0.22",
         "lodash": "^4.17.5",
         "web3-provider-engine": "14.0.6"

packages/0x.js/src/index.ts

@@ -9,6 +9,7 @@ export {
     ERC20ProxyWrapper,
     ERC721ProxyWrapper,
     ForwarderWrapper,
+    OrderValidatorWrapper,
     IndexedFilterValues,
     BlockRange,
     ContractWrappersConfig,
@@ -42,6 +43,10 @@ export {
     DecodedLogEvent,
     ExchangeEventArgs,
     TransactionEncoder,
+    BalanceAndAllowance,
+    OrderAndTraderInfo,
+    TraderInfo,
+    ValidateOrderFillableOpts,
 } from '@0xproject/contract-wrappers';
 
 export { OrderWatcher, OnOrderStateChangeCallback, OrderWatcherConfig } from '@0xproject/order-watcher';

packages/0x.js/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "src"
     },
-    "include": ["./src/**/*", "./test/**/*"]
+    "include": ["./src/**/*"]
 }

packages/0x.js/typedoc-tsconfig.json

@@ -0,0 +1,7 @@
+{
+    "extends": "../../typedoc-tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["./src/**/*", "./test/**/*"]
+}

packages/0x.js/webpack.config.js

@@ -47,8 +47,13 @@ module.exports = {
                 use: [
                     {
                         loader: 'awesome-typescript-loader',
+                        // tsconfig.json contains some options required for
+                        // project references which do not work with webback.
+                        // We override those options here.
                         query: {
                             declaration: false,
+                            declarationMap: false,
+                            composite: false,
                         },
                     },
                 ],

packages/abi-gen/CHANGELOG.json

@@ -1,4 +1,22 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "1.0.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1536142250,
+        "version": "1.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1535377027,
         "version": "1.0.7",

packages/abi-gen/CHANGELOG.md

@@ -5,6 +5,14 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.9 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v1.0.8 - _September 5, 2018_
+
+    * Dependencies updated
+
 ## v1.0.7 - _August 27, 2018_
 
     * Dependencies updated

packages/abi-gen/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/abi-gen",
-    "version": "1.0.7",
+    "version": "1.0.9",
     "engines": {
         "node": ">=6.12"
     },
@@ -8,10 +8,9 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "watch_without_deps": "tsc -w",
         "lint": "tslint --project .",
         "clean": "shx rm -rf lib",
-        "build": "tsc",
+        "build": "tsc -b",
         "test": "yarn run_mocha",
         "run_mocha": "mocha --require source-map-support/register --require make-promises-safe lib/test/**/*_test.js --bail --exit",
         "test:circleci": "yarn test:coverage",
@@ -31,10 +30,10 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen/README.md",
     "dependencies": {
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
         "chalk": "^2.3.0",
-        "ethereum-types": "^1.0.5",
+        "ethereum-types": "^1.0.7",
         "glob": "^7.1.2",
         "handlebars": "^4.0.11",
         "lodash": "^4.17.5",
@@ -45,11 +44,11 @@
         "yargs": "^10.0.3"
     },
     "devDependencies": {
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/glob": "5.0.35",
         "@types/handlebars": "^4.0.36",
         "@types/mkdirp": "^0.5.1",
-        "@types/node": "^8.0.53",
+        "@types/node": "*",
         "@types/sleep": "^0.0.7",
         "@types/tmp": "^0.0.33",
         "@types/yargs": "^10.0.0",

packages/abi-gen/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "."
     },
     "include": ["./src/**/*", "./test/**/*"]
 }

packages/assert/CHANGELOG.json

@@ -1,4 +1,22 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "1.0.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1536142250,
+        "version": "1.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1535377027,
         "version": "1.0.7",

packages/assert/CHANGELOG.md

@@ -5,6 +5,14 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.9 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v1.0.8 - _September 5, 2018_
+
+    * Dependencies updated
+
 ## v1.0.7 - _August 27, 2018_
 
     * Dependencies updated

packages/assert/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/assert",
-    "version": "1.0.7",
+    "version": "1.0.9",
     "engines": {
         "node": ">=6.12"
     },
@@ -8,8 +8,7 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "watch_without_deps": "tsc -w",
-        "build": "tsc",
+        "build": "tsc -b",
         "clean": "shx rm -rf lib test_temp",
         "lint": "tslint --project .",
         "run_mocha": "mocha --require source-map-support/register --require make-promises-safe lib/test/**/*_test.js --exit",
@@ -29,7 +28,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/assert/README.md",
     "devDependencies": {
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "@types/valid-url": "^1.0.2",
@@ -45,9 +44,9 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0xproject/json-schemas": "^1.0.1-rc.6",
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
+        "@0xproject/json-schemas": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
         "lodash": "^4.17.5",
         "valid-url": "^1.0.9"
     },

packages/assert/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "."
     },
     "include": ["./src/**/*", "./test/**/*"]
 }

packages/base-contract/CHANGELOG.json

@@ -1,4 +1,22 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "2.0.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1536142250,
+        "version": "2.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1535377027,
         "version": "2.0.1",

packages/base-contract/CHANGELOG.md

@@ -5,6 +5,14 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.3 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v2.0.2 - _September 5, 2018_
+
+    * Dependencies updated
+
 ## v2.0.1 - _August 27, 2018_
 
     * Dependencies updated

packages/base-contract/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/base-contract",
-    "version": "2.0.1",
+    "version": "2.0.3",
     "engines": {
         "node": ">=6.12"
     },
@@ -8,8 +8,7 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "watch_without_deps": "tsc -w",
-        "build": "tsc",
+        "build": "tsc -b",
         "clean": "shx rm -rf lib",
         "test": "yarn run_mocha",
         "rebuild_and_test": "run-s clean build test",
@@ -29,7 +28,7 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/base-contract/README.md",
     "devDependencies": {
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/lodash": "4.14.104",
         "chai": "^4.0.1",
         "copyfiles": "^2.0.0",
@@ -41,10 +40,10 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
-        "@0xproject/web3-wrapper": "^2.0.1",
-        "ethereum-types": "^1.0.5",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
+        "@0xproject/web3-wrapper": "^2.0.3",
+        "ethereum-types": "^1.0.7",
         "ethers": "3.0.22",
         "lodash": "^4.17.5"
     },

packages/base-contract/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "."
     },
     "include": ["src/**/*", "test/**/*"]
 }

packages/connect/CHANGELOG.json

@@ -1,4 +1,32 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "2.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1537369748,
+        "version": "2.0.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "2.0.0",
+        "changes": [
+            {
+                "note": "Change `OrderConfigRequest` to use BigNumber instead of string for relevant fields.",
+                "pr": 1058
+            }
+        ],
+        "timestamp": 1536142250
+    },
     {
         "version": "2.0.0-rc.2",
         "changes": [

packages/connect/CHANGELOG.md

@@ -5,6 +5,18 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.2 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v2.0.1 - _September 19, 2018_
+
+    * Dependencies updated
+
+## v2.0.0 - _September 5, 2018_
+
+    * Change `OrderConfigRequest` to use BigNumber instead of string for relevant fields. (#1058)
+
 ## v2.0.0-rc.2 - _August 27, 2018_
 
     * Dependencies updated

packages/connect/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/connect",
-    "version": "2.0.0-rc.2",
+    "version": "2.0.2",
     "engines": {
         "node": ">=6.12"
     },
@@ -15,8 +15,7 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "watch_without_deps": "tsc -w",
-        "build": "tsc",
+        "build": "tsc -b",
         "clean": "shx rm -rf lib test_temp generated_docs",
         "copy_test_fixtures": "copyfiles -u 2 './test/fixtures/**/*.json' ./lib/test/fixtures",
         "lint": "tslint --project .",
@@ -26,7 +25,7 @@
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
         "test:circleci": "yarn test:coverage",
-        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_FILES"
+        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES"
     },
     "config": {
         "postpublish": {
@@ -44,11 +43,12 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/connect/README.md",
     "dependencies": {
-        "@0xproject/assert": "^1.0.7",
-        "@0xproject/json-schemas": "^1.0.1-rc.6",
-        "@0xproject/types": "^1.0.1-rc.6",
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
+        "@0xproject/assert": "^1.0.9",
+        "@0xproject/json-schemas": "^1.0.2",
+        "@0xproject/order-utils": "^1.0.3",
+        "@0xproject/types": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
         "lodash": "^4.17.5",
         "query-string": "^5.0.1",
         "sinon": "^4.0.0",
@@ -56,7 +56,7 @@
         "websocket": "^1.0.25"
     },
     "devDependencies": {
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/fetch-mock": "^6.0.3",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",

packages/connect/src/http_client.ts

@@ -151,7 +151,7 @@ export class HttpClient implements Client {
             params: requestOpts,
             payload: request,
         };
-        const responseJson = await this._requestAsync('/order_config', HttpRequestType.Post, httpRequestOpts);
+        const responseJson = await this._requestAsync('/order_config', HttpRequestType.Get, httpRequestOpts);
         const fees = relayerResponseJsonParsers.parseOrderConfigResponseJson(responseJson);
         return fees;
     }

packages/connect/src/types.ts

@@ -126,12 +126,12 @@ export interface PaginatedCollection<T> {
 export interface OrderConfigRequest {
     makerAddress: string;
     takerAddress: string;
-    makerAssetAmount: string;
-    takerAssetAmount: string;
+    makerAssetAmount: BigNumber;
+    takerAssetAmount: BigNumber;
     makerAssetData: string;
     takerAssetData: string;
     exchangeAddress: string;
-    expirationTimeSeconds: string;
+    expirationTimeSeconds: BigNumber;
 }
 
 export interface OrderConfigResponse {

packages/connect/src/utils/relayer_response_json_parsers.ts

@@ -1,5 +1,6 @@
 import { assert } from '@0xproject/assert';
 import { schemas } from '@0xproject/json-schemas';
+import { orderParsingUtils } from '@0xproject/order-utils';
 
 import {
     APIOrder,
@@ -19,7 +20,7 @@ export const relayerResponseJsonParsers = {
     },
     parseAssetPairsItemsJson(json: any): AssetPairsItem[] {
         return json.map((assetDataPair: any) => {
-            return typeConverters.convertStringsFieldsToBigNumbers(assetDataPair, [
+            return orderParsingUtils.convertStringsFieldsToBigNumbers(assetDataPair, [
                 'assetDataA.minAmount',
                 'assetDataA.maxAmount',
                 'assetDataB.minAmount',
@@ -44,6 +45,6 @@ export const relayerResponseJsonParsers = {
     },
     parseOrderConfigResponseJson(json: any): OrderConfigResponse {
         assert.doesConformToSchema('orderConfigResponse', json, schemas.relayerApiOrderConfigResponseSchema);
-        return typeConverters.convertStringsFieldsToBigNumbers(json, ['makerFee', 'takerFee']);
+        return orderParsingUtils.convertStringsFieldsToBigNumbers(json, ['makerFee', 'takerFee']);
     },
 };

packages/connect/src/utils/type_converters.ts

@@ -1,4 +1,4 @@
-import { BigNumber } from '@0xproject/utils';
+import { orderParsingUtils } from '@0xproject/order-utils';
 import * as _ from 'lodash';
 
 import { APIOrder } from '../types';
@@ -21,28 +21,6 @@ export const typeConverters = {
         };
     },
     convertAPIOrderStringFieldsToBigNumber(apiOrder: any): APIOrder {
-        return { ...apiOrder, order: typeConverters.convertOrderStringFieldsToBigNumber(apiOrder.order) };
-    },
-    convertOrderStringFieldsToBigNumber(order: any): any {
-        return typeConverters.convertStringsFieldsToBigNumbers(order, [
-            'makerAssetAmount',
-            'takerAssetAmount',
-            'makerFee',
-            'takerFee',
-            'expirationTimeSeconds',
-            'salt',
-        ]);
-    },
-    convertStringsFieldsToBigNumbers(obj: any, fields: string[]): any {
-        const result = _.assign({}, obj);
-        _.each(fields, field => {
-            _.update(result, field, (value: string) => {
-                if (_.isUndefined(value)) {
-                    throw new Error(`Could not find field '${field}' while converting string fields to BigNumber.`);
-                }
-                return new BigNumber(value);
-            });
-        });
-        return result;
+        return { ...apiOrder, order: orderParsingUtils.convertOrderStringFieldsToBigNumber(apiOrder.order) };
     },
 };

packages/connect/test/http_client_test.ts

@@ -1,3 +1,4 @@
+import { BigNumber } from '@0xproject/utils';
 import * as chai from 'chai';
 import * as chaiAsPromised from 'chai-as-promised';
 import * as dirtyChai from 'dirty-chai';
@@ -138,21 +139,21 @@ describe('HttpClient', () => {
         const request = {
             makerAddress: '0x9e56625509c2f60af937f23b7b532600390e8c8b',
             takerAddress: '0xa2b31dacf30a9c50ca473337c01d8a201ae33e32',
-            makerAssetAmount: '10000000000000000',
-            takerAssetAmount: '20000000000000000',
-            expirationTimeSeconds: '1532560590',
+            makerAssetAmount: new BigNumber('10000000000000000'),
+            takerAssetAmount: new BigNumber('20000000000000000'),
+            expirationTimeSeconds: new BigNumber('1532560590'),
             makerAssetData: '0xf47261b04c32345ced77393b3530b1eed0f346429d',
             takerAssetData: '0x0257179264389b814a946f3e92105513705ca6b990',
             exchangeAddress: '0x12459c951127e0c374ff9105dda097662a027093',
         };
         const url = `${relayUrl}/order_config`;
         it('gets order config', async () => {
-            fetchMock.post(url, orderConfigResponseJSON);
+            fetchMock.get(url, orderConfigResponseJSON);
             const fees = await relayerClient.getOrderConfigAsync(request);
             expect(fees).to.be.deep.equal(orderConfigResponse);
         });
         it('does not mutate input', async () => {
-            fetchMock.post(url, orderConfigResponseJSON);
+            fetchMock.get(url, orderConfigResponseJSON);
             const makerAssetAmountBefore = request.makerAssetAmount;
             const takerAssetAmountBefore = request.takerAssetAmount;
             const expirationTimeSecondsBefore = request.expirationTimeSeconds;
@@ -162,7 +163,7 @@ describe('HttpClient', () => {
             expect(expirationTimeSecondsBefore).to.be.deep.equal(request.expirationTimeSeconds);
         });
         it('throws an error for invalid JSON response', async () => {
-            fetchMock.post(url, { test: 'dummy' });
+            fetchMock.get(url, { test: 'dummy' });
             expect(relayerClient.getOrderConfigAsync(request)).to.be.rejected();
         });
     });

packages/connect/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "."
     },
     "include": ["./src/**/*", "./test/**/*"]
 }

packages/connect/typedoc-tsconfig.json

@@ -0,0 +1,7 @@
+{
+    "extends": "../../typedoc-tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["./src/**/*", "./test/**/*"]
+}

packages/contract-wrappers/CHANGELOG.json

@@ -1,4 +1,55 @@
 [
+    {
+        "timestamp": 1537541580,
+        "version": "1.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.0.3",
+        "changes": [
+            {
+                "note": "Drastically reduce the bundle size by removing unused parts of included contract artifacts."
+            }
+        ],
+        "timestamp": 1537369748
+    },
+    {
+        "version": "1.0.2",
+        "changes": [
+            {
+                "note": "Add ZRX & WETH mainnet contract addresses into the included artifacts"
+            }
+        ],
+        "timestamp": 1537265493
+    },
+    {
+        "version": "1.0.1",
+        "changes": [
+            {
+                "note": "Add `OrderValidatorWrapper`"
+            },
+            {
+                "note":
+                    "Fix bug where contracts not deployed on a network showed an `EXCHANGE_CONTRACT_DOES_NOT_EXIST` error instead of `CONTRACT_NOT_DEPLOYED_ON_NETWORK`",
+                "pr": 1044
+            },
+            {
+                "note":
+                    "Export `AssetBalanceAndProxyAllowanceFetcher` and `OrderFilledCancelledFetcher` implementations",
+                "pr": 1054
+            },
+            {
+                "note":
+                    "Add `validateOrderFillableOrThrowAsync` and `validateFillOrderThrowIfInvalidAsync` to ExchangeWrapper",
+                "pr": 1054
+            }
+        ],
+        "timestamp": 1536142250
+    },
     {
         "version": "1.0.1-rc.5",
         "changes": [

packages/contract-wrappers/CHANGELOG.md

@@ -5,6 +5,25 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.0.4 - _September 21, 2018_
+
+    * Dependencies updated
+
+## v1.0.3 - _September 19, 2018_
+
+    * Drastically reduce the bundle size by removing unused parts of included contract artifacts.
+
+## v1.0.2 - _September 18, 2018_
+
+    * Add ZRX & WETH mainnet contract addresses into the included artifacts
+
+## v1.0.1 - _September 5, 2018_
+
+    * Add `OrderValidatorWrapper`
+    * Fix bug where contracts not deployed on a network showed an `EXCHANGE_CONTRACT_DOES_NOT_EXIST` error instead of `CONTRACT_NOT_DEPLOYED_ON_NETWORK` (#1044)
+    * Export `AssetBalanceAndProxyAllowanceFetcher` and `OrderFilledCancelledFetcher` implementations (#1054)
+    * Add `validateOrderFillableOrThrowAsync` and `validateFillOrderThrowIfInvalidAsync` to ExchangeWrapper (#1054)
+
 ## v1.0.1-rc.5 - _August 27, 2018_
 
     * Fix missing `BlockParamLiteral` type import issue

packages/contract-wrappers/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0xproject/contract-wrappers",
-    "version": "1.0.1-rc.5",
+    "version": "1.0.4",
     "description": "Smart TS wrappers for 0x smart contracts",
     "keywords": [
         "0xproject",
@@ -11,26 +11,23 @@
     "main": "lib/src/index.js",
     "types": "lib/src/index.d.ts",
     "scripts": {
-        "watch_without_deps": "yarn pre_build && tsc -w",
-        "build": "yarn pre_build && tsc",
-        "pre_build": "run-s update_artifacts_v2_beta update_artifacts_v2 generate_contract_wrappers copy_artifacts",
-        "generate_contract_wrappers": "abi-gen --abis 'src/artifacts/@(Exchange|DummyERC20Token|DummyERC721Token|ZRXToken|ERC20Token|ERC721Token|WETH9|ERC20Proxy|ERC721Proxy|Forwarder).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers",
+        "build": "yarn pre_build && tsc -b",
+        "pre_build": "run-s update_artifacts generate_contract_wrappers copy_artifacts",
+        "generate_contract_wrappers": "abi-gen --abis 'src/artifacts/@(Exchange|DummyERC20Token|DummyERC721Token|ZRXToken|ERC20Token|ERC721Token|WETH9|ERC20Proxy|ERC721Proxy|Forwarder|OrderValidator).json' --template ../contract_templates/contract.handlebars --partials '../contract_templates/partials/**/*.handlebars' --output src/contract_wrappers/generated --backend ethers",
         "lint": "tslint --project . --exclude **/src/contract_wrappers/**/* --exclude **/lib/**/*",
         "test:circleci": "run-s test:coverage",
         "test": "yarn run_mocha",
         "rebuild_and_test": "run-s build test",
         "test:coverage": "nyc npm run test --all && yarn coverage:report:lcov",
         "coverage:report:lcov": "nyc report --reporter=text-lcov > coverage/lcov.info",
-        "update_artifacts_v2_beta": "for i in ${npm_package_config_contracts_v2_beta}; do copyfiles -u 4 ../migrations/artifacts/2.0.0-beta-testnet/$i.json src/artifacts; done;",
-        "update_artifacts_v2": "for i in ${npm_package_config_contracts_v2}; do copyfiles -u 4 ../migrations/artifacts/2.0.0/$i.json src/artifacts; done;",
+        "update_artifacts": "for i in ${npm_package_config_contracts_v2}; do copyfiles -u 4 ../migrations/artifacts/2.0.0-trimmed/$i.json src/artifacts; done;",
         "copy_artifacts": "copyfiles -u 2 './src/artifacts/**/*.json' ./lib/src/artifacts",
         "clean": "shx rm -rf _bundles lib test_temp test/artifacts src/contract_wrappers/generated src/artifacts generated_docs",
         "run_mocha": "mocha --require source-map-support/register --require make-promises-safe lib/test/**/*_test.js lib/test/global_hooks.js --timeout 10000 --bail --exit",
-        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --json $JSON_FILE_PATH $PROJECT_FILES"
+        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES"
     },
     "config": {
-        "contracts_v2_beta": "AssetProxyOwner Exchange ERC20Proxy ERC20Token ERC721Proxy ERC721Token WETH9 ZRXToken Forwarder OrderValidator",
-        "contracts_v2": "DummyERC20Token DummyERC721Token",
+        "contracts_v2": "AssetProxyOwner Exchange ERC20Proxy ERC20Token ERC721Proxy ERC721Token WETH9 ZRXToken Forwarder OrderValidator DummyERC20Token DummyERC721Token",
         "postpublish": {
             "assets": []
         }
@@ -44,16 +41,17 @@
         "node": ">=6.0.0"
     },
     "devDependencies": {
-        "@0xproject/abi-gen": "^1.0.7",
-        "@0xproject/dev-utils": "^1.0.6",
-        "@0xproject/migrations": "^1.0.6",
-        "@0xproject/subproviders": "^2.0.1",
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/abi-gen": "^1.0.9",
+        "@0xproject/dev-utils": "^1.0.8",
+        "@0xproject/migrations": "^1.0.10",
+        "@0xproject/subproviders": "^2.0.3",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
-        "@types/node": "^8.0.53",
+        "@types/node": "*",
         "@types/sinon": "^2.2.2",
         "@types/uuid": "^3.4.2",
+        "@types/web3-provider-engine": "^14.0.0",
         "awesome-typescript-loader": "^3.1.3",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
@@ -74,16 +72,16 @@
         "web3-provider-engine": "14.0.6"
     },
     "dependencies": {
-        "@0xproject/assert": "^1.0.7",
-        "@0xproject/base-contract": "^2.0.1",
-        "@0xproject/fill-scenarios": "^1.0.1-rc.5",
-        "@0xproject/json-schemas": "^1.0.1-rc.6",
-        "@0xproject/order-utils": "^1.0.1-rc.6",
-        "@0xproject/types": "^1.0.1-rc.6",
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
-        "@0xproject/web3-wrapper": "^2.0.1",
-        "ethereum-types": "^1.0.5",
+        "@0xproject/assert": "^1.0.9",
+        "@0xproject/base-contract": "^2.0.3",
+        "@0xproject/fill-scenarios": "^1.0.3",
+        "@0xproject/json-schemas": "^1.0.2",
+        "@0xproject/order-utils": "^1.0.3",
+        "@0xproject/types": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
+        "@0xproject/web3-wrapper": "^2.0.3",
+        "ethereum-types": "^1.0.7",
         "ethereumjs-blockstream": "5.0.0",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",

packages/contract-wrappers/src/artifacts.ts

@@ -8,6 +8,7 @@ import * as ERC721Proxy from './artifacts/ERC721Proxy.json';
 import * as ERC721Token from './artifacts/ERC721Token.json';
 import * as Exchange from './artifacts/Exchange.json';
 import * as Forwarder from './artifacts/Forwarder.json';
+import * as OrderValidator from './artifacts/OrderValidator.json';
 import * as EtherToken from './artifacts/WETH9.json';
 import * as ZRXToken from './artifacts/ZRXToken.json';
 
@@ -22,4 +23,5 @@ export const artifacts = {
     ERC20Proxy: (ERC20Proxy as any) as ContractArtifact,
     ERC721Proxy: (ERC721Proxy as any) as ContractArtifact,
     Forwarder: (Forwarder as any) as ContractArtifact,
+    OrderValidator: (OrderValidator as any) as ContractArtifact,
 };

packages/contract-wrappers/src/contract_wrappers.ts

@@ -12,6 +12,7 @@ import { ERC721TokenWrapper } from './contract_wrappers/erc721_token_wrapper';
 import { EtherTokenWrapper } from './contract_wrappers/ether_token_wrapper';
 import { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
 import { ForwarderWrapper } from './contract_wrappers/forwarder_wrapper';
+import { OrderValidatorWrapper } from './contract_wrappers/order_validator_wrapper';
 import { ContractWrappersConfigSchema } from './schemas/contract_wrappers_config_schema';
 import { contractWrappersPrivateNetworkConfigSchema } from './schemas/contract_wrappers_private_network_config_schema';
 import { contractWrappersPublicNetworkConfigSchema } from './schemas/contract_wrappers_public_network_config_schema';
@@ -52,6 +53,10 @@ export class ContractWrappers {
      * An instance of the ForwarderWrapper class containing methods for interacting with any Forwarder smart contract.
      */
     public forwarder: ForwarderWrapper;
+    /**
+     * An instance of the OrderValidatorWrapper class containing methods for interacting with any OrderValidator smart contract.
+     */
+    public orderValidator: OrderValidatorWrapper;
 
     private _web3Wrapper: Web3Wrapper;
     /**
@@ -106,6 +111,8 @@ export class ContractWrappers {
         this.exchange = new ExchangeWrapper(
             this._web3Wrapper,
             config.networkId,
+            this.erc20Token,
+            this.erc721Token,
             config.exchangeContractAddress,
             config.zrxContractAddress,
             blockPollingIntervalMs,
@@ -116,6 +123,7 @@ export class ContractWrappers {
             config.forwarderContractAddress,
             config.zrxContractAddress,
         );
+        this.orderValidator = new OrderValidatorWrapper(this._web3Wrapper, config.networkId);
     }
     /**
      * Sets a new web3 provider for 0x.js. Updating the provider will stop all

packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts

@@ -145,9 +145,12 @@ export abstract class ContractWrapper {
     }
     protected _getContractAddress(artifact: ContractArtifact, addressIfExists?: string): string {
         if (_.isUndefined(addressIfExists)) {
+            if (_.isUndefined(artifact.networks[this._networkId])) {
+                throw new Error(ContractWrappersError.ContractNotDeployedOnNetwork);
+            }
             const contractAddress = artifact.networks[this._networkId].address;
             if (_.isUndefined(contractAddress)) {
-                throw new Error(ContractWrappersError.ExchangeContractDoesNotExist);
+                throw new Error(CONTRACT_NAME_TO_NOT_FOUND_ERROR[artifact.contractName]);
             }
             return contractAddress;
         } else {

packages/contract-wrappers/src/contract_wrappers/exchange_wrapper.ts

@@ -1,12 +1,19 @@
 import { schemas } from '@0xproject/json-schemas';
-import { assetDataUtils } from '@0xproject/order-utils';
+import {
+    assetDataUtils,
+    BalanceAndProxyAllowanceLazyStore,
+    ExchangeTransferSimulator,
+    OrderValidationUtils,
+} from '@0xproject/order-utils';
 import { AssetProxyId, Order, SignedOrder } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
-import { ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
+import { BlockParamLiteral, ContractAbi, LogWithDecodedArgs } from 'ethereum-types';
 import * as _ from 'lodash';
 
 import { artifacts } from '../artifacts';
+import { AssetBalanceAndProxyAllowanceFetcher } from '../fetchers/asset_balance_and_proxy_allowance_fetcher';
+import { OrderFilledCancelledFetcher } from '../fetchers/order_filled_cancelled_fetcher';
 import { methodOptsSchema } from '../schemas/method_opts_schema';
 import { orderTxOptsSchema } from '../schemas/order_tx_opts_schema';
 import { txOptsSchema } from '../schemas/tx_opts_schema';
@@ -17,13 +24,17 @@ import {
     IndexedFilterValues,
     MethodOpts,
     OrderInfo,
+    OrderStatus,
     OrderTransactionOpts,
+    ValidateOrderFillableOpts,
 } from '../types';
 import { assert } from '../utils/assert';
 import { decorators } from '../utils/decorators';
 import { TransactionEncoder } from '../utils/transaction_encoder';
 
 import { ContractWrapper } from './contract_wrapper';
+import { ERC20TokenWrapper } from './erc20_token_wrapper';
+import { ERC721TokenWrapper } from './erc721_token_wrapper';
 import { ExchangeContract, ExchangeEventArgs, ExchangeEvents } from './generated/exchange';
 
 /**
@@ -33,6 +44,8 @@ import { ExchangeContract, ExchangeEventArgs, ExchangeEvents } from './generated
 export class ExchangeWrapper extends ContractWrapper {
     public abi: ContractAbi = artifacts.Exchange.compilerOutput.abi;
     private _exchangeContractIfExists?: ExchangeContract;
+    private _erc721TokenWrapper: ERC721TokenWrapper;
+    private _erc20TokenWrapper: ERC20TokenWrapper;
     private _contractAddressIfExists?: string;
     private _zrxContractAddressIfExists?: string;
     /**
@@ -48,11 +61,15 @@ export class ExchangeWrapper extends ContractWrapper {
     constructor(
         web3Wrapper: Web3Wrapper,
         networkId: number,
+        erc20TokenWrapper: ERC20TokenWrapper,
+        erc721TokenWrapper: ERC721TokenWrapper,
         contractAddressIfExists?: string,
         zrxContractAddressIfExists?: string,
         blockPollingIntervalMs?: number,
     ) {
         super(web3Wrapper, networkId, blockPollingIntervalMs);
+        this._erc20TokenWrapper = erc20TokenWrapper;
+        this._erc721TokenWrapper = erc721TokenWrapper;
         this._contractAddressIfExists = contractAddressIfExists;
         this._zrxContractAddressIfExists = zrxContractAddressIfExists;
     }
@@ -1084,6 +1101,64 @@ export class ExchangeWrapper extends ContractWrapper {
         );
         return logs;
     }
+    /**
+     * Validate if the supplied order is fillable, and throw if it isn't
+     * @param signedOrder SignedOrder of interest
+     * @param opts ValidateOrderFillableOpts options (e.g expectedFillTakerTokenAmount.
+     * If it isn't supplied, we check if the order is fillable for a non-zero amount)
+     */
+    public async validateOrderFillableOrThrowAsync(
+        signedOrder: SignedOrder,
+        opts: ValidateOrderFillableOpts = {},
+    ): Promise<void> {
+        const balanceAllowanceFetcher = new AssetBalanceAndProxyAllowanceFetcher(
+            this._erc20TokenWrapper,
+            this._erc721TokenWrapper,
+            BlockParamLiteral.Latest,
+        );
+        const balanceAllowanceStore = new BalanceAndProxyAllowanceLazyStore(balanceAllowanceFetcher);
+        const exchangeTradeSimulator = new ExchangeTransferSimulator(balanceAllowanceStore);
+
+        const expectedFillTakerTokenAmountIfExists = opts.expectedFillTakerTokenAmount;
+        const filledCancelledFetcher = new OrderFilledCancelledFetcher(this, BlockParamLiteral.Latest);
+        const orderValidationUtils = new OrderValidationUtils(filledCancelledFetcher);
+        await orderValidationUtils.validateOrderFillableOrThrowAsync(
+            exchangeTradeSimulator,
+            signedOrder,
+            this.getZRXAssetData(),
+            expectedFillTakerTokenAmountIfExists,
+        );
+    }
+    /**
+     * Validate a call to FillOrder and throw if it wouldn't succeed
+     * @param signedOrder SignedOrder of interest
+     * @param fillTakerAssetAmount Amount we'd like to fill the order for
+     * @param takerAddress The taker of the order
+     */
+    public async validateFillOrderThrowIfInvalidAsync(
+        signedOrder: SignedOrder,
+        fillTakerAssetAmount: BigNumber,
+        takerAddress: string,
+    ): Promise<void> {
+        const balanceAllowanceFetcher = new AssetBalanceAndProxyAllowanceFetcher(
+            this._erc20TokenWrapper,
+            this._erc721TokenWrapper,
+            BlockParamLiteral.Latest,
+        );
+        const balanceAllowanceStore = new BalanceAndProxyAllowanceLazyStore(balanceAllowanceFetcher);
+        const exchangeTradeSimulator = new ExchangeTransferSimulator(balanceAllowanceStore);
+
+        const filledCancelledFetcher = new OrderFilledCancelledFetcher(this, BlockParamLiteral.Latest);
+        const orderValidationUtils = new OrderValidationUtils(filledCancelledFetcher);
+        await orderValidationUtils.validateFillOrderThrowIfInvalidAsync(
+            exchangeTradeSimulator,
+            this._web3Wrapper.getProvider(),
+            signedOrder,
+            fillTakerAssetAmount,
+            takerAddress,
+            this.getZRXAssetData(),
+        );
+    }
     /**
      * Retrieves the Ethereum address of the Exchange contract deployed on the network
      * that the user-passed web3 provider is connected to.

packages/contract-wrappers/src/contract_wrappers/order_validator_wrapper.ts

@@ -0,0 +1,187 @@
+import { schemas } from '@0xproject/json-schemas';
+import { SignedOrder } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import { ContractAbi } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { artifacts } from '../artifacts';
+import { BalanceAndAllowance, OrderAndTraderInfo, TraderInfo } from '../types';
+import { assert } from '../utils/assert';
+
+import { ContractWrapper } from './contract_wrapper';
+import { OrderValidatorContract } from './generated/order_validator';
+
+/**
+ * This class includes the functionality related to interacting with the OrderValidator contract.
+ */
+export class OrderValidatorWrapper extends ContractWrapper {
+    public abi: ContractAbi = artifacts.OrderValidator.compilerOutput.abi;
+    private _orderValidatorContractIfExists?: OrderValidatorContract;
+    /**
+     * Instantiate OrderValidatorWrapper
+     * @param web3Wrapper Web3Wrapper instance to use
+     * @param networkId Desired networkId
+     */
+    constructor(web3Wrapper: Web3Wrapper, networkId: number) {
+        super(web3Wrapper, networkId);
+    }
+    /**
+     * Get an object conforming to OrderAndTraderInfo containing on-chain information of the provided order and address
+     * @param   order           An object conforming to SignedOrder
+     * @param   takerAddress    An ethereum address
+     * @return  OrderAndTraderInfo
+     */
+    public async getOrderAndTraderInfoAsync(order: SignedOrder, takerAddress: string): Promise<OrderAndTraderInfo> {
+        assert.doesConformToSchema('order', order, schemas.signedOrderSchema);
+        assert.isETHAddressHex('takerAddress', takerAddress);
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const orderAndTraderInfo = await OrderValidatorContractInstance.getOrderAndTraderInfo.callAsync(
+            order,
+            takerAddress,
+        );
+        const result = {
+            orderInfo: orderAndTraderInfo[0],
+            traderInfo: orderAndTraderInfo[1],
+        };
+        return result;
+    }
+    /**
+     * Get an array of objects conforming to OrderAndTraderInfo containing on-chain information of the provided orders and addresses
+     * @param   orders          An array of objects conforming to SignedOrder
+     * @param   takerAddresses  An array of ethereum addresses
+     * @return  array of OrderAndTraderInfo
+     */
+    public async getOrdersAndTradersInfoAsync(
+        orders: SignedOrder[],
+        takerAddresses: string[],
+    ): Promise<OrderAndTraderInfo[]> {
+        assert.doesConformToSchema('orders', orders, schemas.signedOrdersSchema);
+        _.forEach(takerAddresses, (takerAddress, index) =>
+            assert.isETHAddressHex(`takerAddresses[${index}]`, takerAddress),
+        );
+        assert.assert(orders.length === takerAddresses.length, 'Expected orders.length to equal takerAddresses.length');
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const ordersAndTradersInfo = await OrderValidatorContractInstance.getOrdersAndTradersInfo.callAsync(
+            orders,
+            takerAddresses,
+        );
+        const orderInfos = ordersAndTradersInfo[0];
+        const traderInfos = ordersAndTradersInfo[1];
+        const result = _.map(orderInfos, (orderInfo, index) => {
+            const traderInfo = traderInfos[index];
+            return {
+                orderInfo,
+                traderInfo,
+            };
+        });
+        return result;
+    }
+    /**
+     * Get an object conforming to TraderInfo containing on-chain balance and allowances for maker and taker of order
+     * @param   order           An object conforming to SignedOrder
+     * @param   takerAddress    An ethereum address
+     * @return  TraderInfo
+     */
+    public async getTraderInfoAsync(order: SignedOrder, takerAddress: string): Promise<TraderInfo> {
+        assert.doesConformToSchema('order', order, schemas.signedOrderSchema);
+        assert.isETHAddressHex('takerAddress', takerAddress);
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const result = await OrderValidatorContractInstance.getTraderInfo.callAsync(order, takerAddress);
+        return result;
+    }
+    /**
+     * Get an array of objects conforming to TraderInfo containing on-chain balance and allowances for maker and taker of order
+     * @param   orders          An array of objects conforming to SignedOrder
+     * @param   takerAddresses  An array of ethereum addresses
+     * @return  array of TraderInfo
+     */
+    public async getTradersInfoAsync(orders: SignedOrder[], takerAddresses: string[]): Promise<TraderInfo[]> {
+        assert.doesConformToSchema('orders', orders, schemas.signedOrdersSchema);
+        _.forEach(takerAddresses, (takerAddress, index) =>
+            assert.isETHAddressHex(`takerAddresses[${index}]`, takerAddress),
+        );
+        assert.assert(orders.length === takerAddresses.length, 'Expected orders.length to equal takerAddresses.length');
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const result = await OrderValidatorContractInstance.getTradersInfo.callAsync(orders, takerAddresses);
+        return result;
+    }
+    /**
+     * Get an object conforming to BalanceAndAllowance containing on-chain balance and allowance for some address and assetData
+     * @param   address     An ethereum address
+     * @param   assetData   An encoded string that can be decoded by a specified proxy contract
+     * @return  BalanceAndAllowance
+     */
+    public async getBalanceAndAllowanceAsync(address: string, assetData: string): Promise<BalanceAndAllowance> {
+        assert.isETHAddressHex('address', address);
+        assert.isHexString('assetData', assetData);
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const balanceAndAllowance = await OrderValidatorContractInstance.getBalanceAndAllowance.callAsync(
+            address,
+            assetData,
+        );
+        const result = {
+            balance: balanceAndAllowance[0],
+            allowance: balanceAndAllowance[1],
+        };
+        return result;
+    }
+    /**
+     * Get an array of objects conforming to BalanceAndAllowance containing on-chain balance and allowance for some address and array of assetDatas
+     * @param   address     An ethereum address
+     * @param   assetDatas  An array of encoded strings that can be decoded by a specified proxy contract
+     * @return  BalanceAndAllowance
+     */
+    public async getBalancesAndAllowancesAsync(address: string, assetDatas: string[]): Promise<BalanceAndAllowance[]> {
+        assert.isETHAddressHex('address', address);
+        _.forEach(assetDatas, (assetData, index) => assert.isHexString(`assetDatas[${index}]`, assetData));
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const balancesAndAllowances = await OrderValidatorContractInstance.getBalancesAndAllowances.callAsync(
+            address,
+            assetDatas,
+        );
+        const balances = balancesAndAllowances[0];
+        const allowances = balancesAndAllowances[1];
+        const result = _.map(balances, (balance, index) => {
+            const allowance = allowances[index];
+            return {
+                balance,
+                allowance,
+            };
+        });
+        return result;
+    }
+    /**
+     * Get owner address of tokenId by calling `token.ownerOf(tokenId)`, but returns a null owner instead of reverting on an unowned token.
+     * @param   tokenAddress    An ethereum address
+     * @param   tokenId         An ERC721 tokenId
+     * @return  Owner of tokenId or null address if unowned
+     */
+    public async getERC721TokenOwnerAsync(tokenAddress: string, tokenId: BigNumber): Promise<string | undefined> {
+        assert.isETHAddressHex('tokenAddress', tokenAddress);
+        assert.isBigNumber('tokenId', tokenId);
+        const OrderValidatorContractInstance = await this._getOrderValidatorContractAsync();
+        const result = await OrderValidatorContractInstance.getERC721TokenOwner.callAsync(tokenAddress, tokenId);
+        return result;
+    }
+    // HACK: We don't want this method to be visible to the other units within that package but not to the end user.
+    // TS doesn't give that possibility and therefore we make it private and access it over an any cast. Because of that tslint sees it as unused.
+    // tslint:disable-next-line:no-unused-variable
+    private _invalidateContractInstance(): void {
+        delete this._orderValidatorContractIfExists;
+    }
+    private async _getOrderValidatorContractAsync(): Promise<OrderValidatorContract> {
+        if (!_.isUndefined(this._orderValidatorContractIfExists)) {
+            return this._orderValidatorContractIfExists;
+        }
+        const [abi, address] = await this._getContractAbiAndAddressFromArtifactsAsync(artifacts.OrderValidator);
+        const contractInstance = new OrderValidatorContract(
+            abi,
+            address,
+            this._web3Wrapper.getProvider(),
+            this._web3Wrapper.getContractDefaults(),
+        );
+        this._orderValidatorContractIfExists = contractInstance;
+        return this._orderValidatorContractIfExists;
+    }
+}

packages/contract-wrappers/src/fetchers/asset_balance_and_proxy_allowance_fetcher.ts

@@ -1,8 +1,11 @@
 // tslint:disable:no-unnecessary-type-assertion
-import { BlockParamLiteral, ERC20TokenWrapper, ERC721TokenWrapper } from '@0xproject/contract-wrappers';
 import { AbstractBalanceAndProxyAllowanceFetcher, assetDataUtils } from '@0xproject/order-utils';
 import { AssetProxyId, ERC20AssetData, ERC721AssetData } from '@0xproject/types';
 import { BigNumber } from '@0xproject/utils';
+import { BlockParamLiteral } from 'ethereum-types';
+
+import { ERC20TokenWrapper } from '../contract_wrappers/erc20_token_wrapper';
+import { ERC721TokenWrapper } from '../contract_wrappers/erc721_token_wrapper';
 
 export class AssetBalanceAndProxyAllowanceFetcher implements AbstractBalanceAndProxyAllowanceFetcher {
     private readonly _erc20Token: ERC20TokenWrapper;

packages/contract-wrappers/src/fetchers/order_filled_cancelled_fetcher.ts

@@ -1,7 +1,10 @@
 // tslint:disable:no-unnecessary-type-assertion
-import { BlockParamLiteral, ExchangeWrapper } from '@0xproject/contract-wrappers';
 import { AbstractOrderFilledCancelledFetcher } from '@0xproject/order-utils';
 import { BigNumber } from '@0xproject/utils';
+import { BlockParamLiteral } from 'ethereum-types';
+
+import { ERC20TokenWrapper } from '../contract_wrappers/erc20_token_wrapper';
+import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper';
 
 export class OrderFilledCancelledFetcher implements AbstractOrderFilledCancelledFetcher {
     private readonly _exchange: ExchangeWrapper;

packages/contract-wrappers/src/index.ts

@@ -6,6 +6,7 @@ export { ExchangeWrapper } from './contract_wrappers/exchange_wrapper';
 export { ERC20ProxyWrapper } from './contract_wrappers/erc20_proxy_wrapper';
 export { ERC721ProxyWrapper } from './contract_wrappers/erc721_proxy_wrapper';
 export { ForwarderWrapper } from './contract_wrappers/forwarder_wrapper';
+export { OrderValidatorWrapper } from './contract_wrappers/order_validator_wrapper';
 
 export { TransactionEncoder } from './utils/transaction_encoder';
 
@@ -21,6 +22,10 @@ export {
     OrderInfo,
     EventCallback,
     DecodedLogEvent,
+    BalanceAndAllowance,
+    OrderAndTraderInfo,
+    TraderInfo,
+    ValidateOrderFillableOpts,
 } from './types';
 
 export { Order, SignedOrder, AssetProxyId } from '@0xproject/types';
@@ -81,3 +86,8 @@ export {
     ExchangeEventArgs,
     ExchangeEvents,
 } from './contract_wrappers/generated/exchange';
+
+export { AbstractBalanceAndProxyAllowanceFetcher, AbstractOrderFilledCancelledFetcher } from '@0xproject/order-utils';
+
+export { AssetBalanceAndProxyAllowanceFetcher } from './fetchers/asset_balance_and_proxy_allowance_fetcher';
+export { OrderFilledCancelledFetcher } from './fetchers/order_filled_cancelled_fetcher';

packages/contract-wrappers/src/types.ts

@@ -188,3 +188,24 @@ export enum OrderStatus {
     FULLY_FILLED,
     CANCELLED,
 }
+
+export interface TraderInfo {
+    makerBalance: BigNumber;
+    makerAllowance: BigNumber;
+    takerBalance: BigNumber;
+    takerAllowance: BigNumber;
+    makerZrxBalance: BigNumber;
+    makerZrxAllowance: BigNumber;
+    takerZrxBalance: BigNumber;
+    takerZrxAllowance: BigNumber;
+}
+
+export interface OrderAndTraderInfo {
+    orderInfo: OrderInfo;
+    traderInfo: TraderInfo;
+}
+
+export interface BalanceAndAllowance {
+    balance: BigNumber;
+    allowance: BigNumber;
+}

packages/contract-wrappers/src/utils/decorators.ts

@@ -24,7 +24,7 @@ const contractCallErrorTransformer = (error: Error) => {
 const schemaErrorTransformer = (error: Error) => {
     if (_.includes(error.message, constants.INVALID_TAKER_FORMAT)) {
         const errMsg =
-            'Order taker must be of type string. If you want anyone to be able to fill an order - pass ZeroEx.NULL_ADDRESS';
+            'Order taker must be of type string. If you want anyone to be able to fill an order - pass NULL_ADDRESS';
         return new Error(errMsg);
     }
     return error;

packages/contract-wrappers/test/exchange_wrapper_test.ts

@@ -358,7 +358,7 @@ describe('ExchangeWrapper', () => {
     describe('#getVersionAsync', () => {
         it('should return version the hash', async () => {
             const version = await contractWrappers.exchange.getVersionAsync();
-            const VERSION = '2.0.1-alpha';
+            const VERSION = '2.0.0';
             expect(version).to.be.equal(VERSION);
         });
     });

packages/contract-wrappers/test/forwarder_wrapper_test.ts

@@ -25,10 +25,8 @@ describe('ForwarderWrapper', () => {
         blockPollingIntervalMs: 0,
     };
     const fillableAmount = new BigNumber(5);
-    const takerTokenFillAmount = new BigNumber(5);
     let contractWrappers: ContractWrappers;
     let fillScenarios: FillScenarios;
-    let forwarderContractAddress: string;
     let exchangeContractAddress: string;
     let zrxTokenAddress: string;
     let userAddresses: string[];
@@ -46,7 +44,6 @@ describe('ForwarderWrapper', () => {
     before(async () => {
         await blockchainLifecycle.startAsync();
         contractWrappers = new ContractWrappers(provider, contractWrappersConfig);
-        forwarderContractAddress = contractWrappers.forwarder.getContractAddress();
         exchangeContractAddress = contractWrappers.exchange.getContractAddress();
         userAddresses = await web3Wrapper.getAvailableAddressesAsync();
         zrxTokenAddress = tokenUtils.getProtocolTokenAddress();

packages/contract-wrappers/test/order_validator_wrapper_test.ts

@@ -0,0 +1,142 @@
+import { BlockchainLifecycle, callbackErrorReporter } from '@0xproject/dev-utils';
+import { FillScenarios } from '@0xproject/fill-scenarios';
+import { assetDataUtils, orderHashUtils } from '@0xproject/order-utils';
+import { DoneCallback, SignedOrder } from '@0xproject/types';
+import { BigNumber } from '@0xproject/utils';
+import * as chai from 'chai';
+import { BlockParamLiteral } from 'ethereum-types';
+import * as _ from 'lodash';
+import 'mocha';
+
+import { ContractWrappers, ExchangeCancelEventArgs, ExchangeEvents, ExchangeFillEventArgs, OrderStatus } from '../src';
+import { DecodedLogEvent, OrderInfo, TraderInfo } from '../src/types';
+
+import { chaiSetup } from './utils/chai_setup';
+import { constants } from './utils/constants';
+import { tokenUtils } from './utils/token_utils';
+import { provider, web3Wrapper } from './utils/web3_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('OrderValidator', () => {
+    const contractWrappersConfig = {
+        networkId: constants.TESTRPC_NETWORK_ID,
+        blockPollingIntervalMs: 0,
+    };
+    const fillableAmount = new BigNumber(5);
+    const partialFillAmount = new BigNumber(2);
+    let contractWrappers: ContractWrappers;
+    let fillScenarios: FillScenarios;
+    let exchangeContractAddress: string;
+    let zrxTokenAddress: string;
+    let zrxTokenAssetData: string;
+    let userAddresses: string[];
+    let coinbase: string;
+    let makerAddress: string;
+    let takerAddress: string;
+    let feeRecipient: string;
+    let anotherMakerAddress: string;
+    let makerTokenAddress: string;
+    let takerTokenAddress: string;
+    let makerAssetData: string;
+    let takerAssetData: string;
+    let signedOrder: SignedOrder;
+    let anotherSignedOrder: SignedOrder;
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+        contractWrappers = new ContractWrappers(provider, contractWrappersConfig);
+        exchangeContractAddress = contractWrappers.exchange.getContractAddress();
+        userAddresses = await web3Wrapper.getAvailableAddressesAsync();
+        zrxTokenAddress = tokenUtils.getProtocolTokenAddress();
+        zrxTokenAssetData = assetDataUtils.encodeERC20AssetData(zrxTokenAddress);
+        fillScenarios = new FillScenarios(
+            provider,
+            userAddresses,
+            zrxTokenAddress,
+            exchangeContractAddress,
+            contractWrappers.erc20Proxy.getContractAddress(),
+            contractWrappers.erc721Proxy.getContractAddress(),
+        );
+        [coinbase, makerAddress, takerAddress, feeRecipient, anotherMakerAddress] = userAddresses;
+        [makerTokenAddress] = tokenUtils.getDummyERC20TokenAddresses();
+        takerTokenAddress = tokenUtils.getWethTokenAddress();
+        [makerAssetData, takerAssetData] = [
+            assetDataUtils.encodeERC20AssetData(makerTokenAddress),
+            assetDataUtils.encodeERC20AssetData(takerTokenAddress),
+        ];
+
+        signedOrder = await fillScenarios.createFillableSignedOrderAsync(
+            makerAssetData,
+            takerAssetData,
+            makerAddress,
+            constants.NULL_ADDRESS,
+            fillableAmount,
+        );
+        anotherSignedOrder = await fillScenarios.createFillableSignedOrderAsync(
+            zrxTokenAssetData,
+            takerAssetData,
+            makerAddress,
+            constants.NULL_ADDRESS,
+            fillableAmount,
+        );
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('#getOrdersAndTradersInfoAsync', () => {
+        let signedOrders: SignedOrder[];
+        let takerAddresses: string[];
+        let ordersInfo: OrderInfo[];
+        let tradersInfo: TraderInfo[];
+        beforeEach(async () => {
+            signedOrders = [signedOrder, anotherSignedOrder];
+            takerAddresses = [takerAddress, takerAddress];
+            const ordersAndTradersInfo = await contractWrappers.orderValidator.getOrdersAndTradersInfoAsync(
+                signedOrders,
+                takerAddresses,
+            );
+            ordersInfo = _.map(ordersAndTradersInfo, orderAndTraderInfo => orderAndTraderInfo.orderInfo);
+            tradersInfo = _.map(ordersAndTradersInfo, orderAndTraderInfo => orderAndTraderInfo.traderInfo);
+        });
+        it('should return the same number of order infos and trader infos as input orders', async () => {
+            expect(ordersInfo.length).to.be.equal(signedOrders.length);
+            expect(tradersInfo.length).to.be.equal(takerAddresses.length);
+        });
+        it('should return correct on-chain order info for input orders', async () => {
+            const firstOrderInfo = ordersInfo[0];
+            const secondOrderInfo = ordersInfo[1];
+            expect(firstOrderInfo.orderStatus).to.be.equal(OrderStatus.FILLABLE);
+            expect(firstOrderInfo.orderTakerAssetFilledAmount).to.bignumber.equal(constants.ZERO_AMOUNT);
+            expect(secondOrderInfo.orderStatus).to.be.equal(OrderStatus.FILLABLE);
+            expect(secondOrderInfo.orderTakerAssetFilledAmount).to.bignumber.equal(constants.ZERO_AMOUNT);
+        });
+        it('should return correct on-chain trader info for input takers', async () => {
+            const firstTraderInfo = tradersInfo[0];
+            const secondTraderInfo = tradersInfo[1];
+            expect(firstTraderInfo.makerBalance).to.bignumber.equal(new BigNumber(5));
+            expect(firstTraderInfo.makerAllowance).to.bignumber.equal(new BigNumber(5));
+            expect(firstTraderInfo.takerBalance).to.bignumber.equal(new BigNumber(0));
+            expect(firstTraderInfo.takerAllowance).to.bignumber.equal(new BigNumber(0));
+            expect(firstTraderInfo.makerZrxBalance).to.bignumber.equal(new BigNumber(5));
+            expect(firstTraderInfo.makerZrxAllowance).to.bignumber.equal(new BigNumber(5));
+            expect(firstTraderInfo.takerZrxBalance).to.bignumber.equal(new BigNumber(0));
+            expect(firstTraderInfo.takerZrxAllowance).to.bignumber.equal(new BigNumber(0));
+            expect(secondTraderInfo.makerBalance).to.bignumber.equal(new BigNumber(5));
+            expect(secondTraderInfo.makerAllowance).to.bignumber.equal(new BigNumber(5));
+            expect(secondTraderInfo.takerBalance).to.bignumber.equal(new BigNumber(0));
+            expect(secondTraderInfo.takerAllowance).to.bignumber.equal(new BigNumber(0));
+            expect(secondTraderInfo.makerZrxBalance).to.bignumber.equal(new BigNumber(5));
+            expect(secondTraderInfo.makerZrxAllowance).to.bignumber.equal(new BigNumber(5));
+            expect(secondTraderInfo.takerZrxBalance).to.bignumber.equal(new BigNumber(0));
+            expect(secondTraderInfo.takerZrxAllowance).to.bignumber.equal(new BigNumber(0));
+        });
+    });
+});

packages/contract-wrappers/test/utils/constants.ts

@@ -15,4 +15,5 @@ export const constants = {
     DUMMY_TOKEN_TOTAL_SUPPLY: new BigNumber(10 ** 27), // tslint:disable-line:custom-no-magic-numbers
     NUM_DUMMY_ERC20_TO_DEPLOY: 3,
     NUM_DUMMY_ERC721_TO_DEPLOY: 1,
+    ZERO_AMOUNT: new BigNumber(0),
 };

packages/contract-wrappers/tsconfig.json

@@ -1,7 +1,8 @@
 {
     "extends": "../../tsconfig",
     "compilerOptions": {
-        "outDir": "lib"
+        "outDir": "lib",
+        "rootDir": "."
     },
     "include": ["./src/**/*", "./test/**/*"]
 }

packages/contract-wrappers/typedoc-tsconfig.json

@@ -0,0 +1,7 @@
+{
+    "extends": "../../typedoc-tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["./src/**/*", "./test/**/*"]
+}

packages/contracts/README.md

@@ -1,14 +1,35 @@
 ## Contracts
 
-Smart contracts that implement the 0x protocol.
+Smart contracts that implement the 0x protocol. Addresses of the deployed contracts can be found [here](https://0xproject.com/wiki#Deployed-Addresses).
 
 ## Usage
 
-*   [Docs](https://0xproject.com/docs/contracts)
-*   [Overview of 0x protocol architecture](https://0xproject.com/wiki#Architecture)
-*   [0x smart contract interactions](https://0xproject.com/wiki#Contract-Interactions)
-*   [Deployed smart contract addresses](https://0xproject.com/wiki#Deployed-Addresses)
-*   [0x protocol message format](https://0xproject.com/wiki#Message-Format)
+### 2.0.0
+
+Contracts that make up and interact with version 2.0.0 of the protocol can be found in the `src/2.0.0` directory. The contents of this directory are broken down into the following subdirectories:
+
+*   protocol
+    *   This directory contains the contracts that make up version 2.0.0. A full specification can be found [here](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md).
+*   extensions
+    *   This directory contains contracts that interact with the 2.0.0 contracts and will be used in production, such as the [Forwarder](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract.
+*   examples
+    *   This directory contains example implementations of contracts that interact with the protocol but are _not_ intended for use in production. Examples include [filter](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#filter-contracts) contracts, a [Wallet](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#wallet) contract, and a [Validator](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#validator) contract, among others.
+*   tokens
+    *   This directory contains implementations of different tokens and token standards, including [wETH](https://weth.io/), ZRX, [ERC20](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md), and [ERC721](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md).
+*   multisig
+    *   This directory contains the [Gnosis MultiSigWallet](https://github.com/gnosis/MultiSigWallet) and a custom extension that adds a timelock to transactions within the MultiSigWallet.
+*   utils
+    *   This directory contains libraries and utils that are shared across all of the other directories.
+*   test
+    *   This directory contains mocks and other contracts that are used solely for testing contracts within the other directories.
+
+### 1.0.0
+
+Contracts that make up version 1.0.0 of the protocol can be found in `src/1.0.0`. These contracts are considered deprecated and will have limited support going forward.
+
+## 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
 

packages/contracts/compiler.json

@@ -1,5 +1,5 @@
 {
-    "artifactsDir": "../migrations/artifacts/2.0.0",
+    "artifactsDir": "../migrations/artifacts/development",
     "contractsDir": "src/",
     "compilerSettings": {
         "optimizer": {
@@ -23,6 +23,7 @@
         "DummyERC20Token",
         "DummyERC721Receiver",
         "DummyERC721Token",
+        "DummyMultipleReturnERC20Token",
         "DummyNoReturnERC20Token",
         "ERC20Proxy",
         "ERC20Token",

packages/contracts/package.json

@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "contracts",
-    "version": "2.1.42",
+    "version": "2.1.45",
     "engines": {
         "node": ">=6.12"
     },
@@ -11,10 +11,9 @@
         "test": "test"
     },
     "scripts": {
-        "watch_without_deps": "yarn pre_build && tsc -w",
-        "build": "yarn pre_build && tsc",
+        "build": "yarn pre_build && tsc -b",
         "pre_build": "run-s compile copy_artifacts generate_contract_wrappers",
-        "copy_artifacts": "copyfiles -u 4 '../migrations/artifacts/2.0.0/**/*' ./lib/artifacts;",
+        "copy_artifacts": "copyfiles -u 4 '../migrations/artifacts/development/**/*' ./lib/artifacts;",
         "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",
@@ -33,7 +32,7 @@
         "lint-contracts": "solhint src/2.0.0/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyNoReturnERC20Token|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|ReentrantERC20Token|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|TokenRegistry|Whitelist|WETH9|ZRXToken).json"
+        "abis": "../migrations/artifacts/development/@(AssetProxyOwner|DummyERC20Token|DummyERC721Receiver|DummyERC721Token|DummyMultipleReturnERC20Token|DummyNoReturnERC20Token|ERC20Proxy|ERC721Proxy|Forwarder|Exchange|ExchangeWrapper|IAssetData|IAssetProxy|InvalidERC721Receiver|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|OrderValidator|ReentrantERC20Token|TestAssetProxyOwner|TestAssetProxyDispatcher|TestConstants|TestExchangeInternals|TestLibBytes|TestLibs|TestSignatureValidator|TestStaticCallReceiver|Validator|Wallet|TokenRegistry|Whitelist|WETH9|ZRXToken).json"
     },
     "repository": {
         "type": "git",
@@ -46,16 +45,16 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/packages/contracts/README.md",
     "devDependencies": {
-        "@0xproject/abi-gen": "^1.0.7",
-        "@0xproject/dev-utils": "^1.0.6",
-        "@0xproject/sol-compiler": "^1.1.1",
-        "@0xproject/sol-cov": "^2.1.1",
-        "@0xproject/subproviders": "^2.0.1",
-        "@0xproject/tslint-config": "^1.0.6",
+        "@0xproject/abi-gen": "^1.0.9",
+        "@0xproject/dev-utils": "^1.0.8",
+        "@0xproject/sol-compiler": "^1.1.3",
+        "@0xproject/sol-cov": "^2.1.3",
+        "@0xproject/subproviders": "^2.0.3",
+        "@0xproject/tslint-config": "^1.0.7",
         "@types/bn.js": "^4.11.0",
         "@types/ethereumjs-abi": "^0.6.0",
         "@types/lodash": "4.14.104",
-        "@types/node": "^8.0.53",
+        "@types/node": "*",
         "@types/yargs": "^10.0.0",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
@@ -73,15 +72,15 @@
         "yargs": "^10.0.3"
     },
     "dependencies": {
-        "@0xproject/base-contract": "^2.0.1",
-        "@0xproject/order-utils": "^1.0.1-rc.6",
-        "@0xproject/types": "^1.0.1-rc.6",
-        "@0xproject/typescript-typings": "^1.0.5",
-        "@0xproject/utils": "^1.0.7",
-        "@0xproject/web3-wrapper": "^2.0.1",
+        "@0xproject/base-contract": "^2.0.3",
+        "@0xproject/order-utils": "^1.0.3",
+        "@0xproject/types": "^1.0.2",
+        "@0xproject/typescript-typings": "^2.0.1",
+        "@0xproject/utils": "^1.0.9",
+        "@0xproject/web3-wrapper": "^2.0.3",
         "@types/js-combinatorics": "^0.5.29",
         "bn.js": "^4.11.8",
-        "ethereum-types": "^1.0.5",
+        "ethereum-types": "^1.0.7",
         "ethereumjs-abi": "0.6.5",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",

packages/contracts/src/2.0.0/extensions/Forwarder/Forwarder.sol

@@ -34,7 +34,6 @@ contract Forwarder is
     MixinExchangeWrapper,
     MixinForwarderCore
 {
-
     constructor (
         address _exchange,
         bytes memory _zrxAssetData,

packages/contracts/src/2.0.0/extensions/Forwarder/MixinAssets.sol

@@ -31,7 +31,6 @@ contract MixinAssets is
     LibConstants,
     MAssets
 {
-
     using LibBytes for bytes;
 
     bytes4 constant internal ERC20_TRANSFER_SELECTOR = bytes4(keccak256("transfer(address,uint256)"));

packages/contracts/src/2.0.0/extensions/Forwarder/MixinExchangeWrapper.sol

@@ -34,7 +34,6 @@ contract MixinExchangeWrapper is
     LibConstants,
     MExchangeWrapper
 {
-
     /// @dev Fills the input order.
     ///      Returns false if the transaction would otherwise revert.
     /// @param order Order struct containing order specifications.
@@ -61,7 +60,7 @@ contract MixinExchangeWrapper is
         // Call `fillOrder` and handle any exceptions gracefully
         assembly {
             let success := call(
-                gas,                                // forward all gas, TODO: look into gas consumption of assert/throw
+                gas,                                // forward all gas
                 exchange,                           // call address of Exchange contract
                 0,                                  // transfer 0 wei
                 add(fillOrderCalldata, 32),         // pointer to start of input (skip array length in first 32 bytes)
@@ -69,20 +68,14 @@ contract MixinExchangeWrapper is
                 fillOrderCalldata,                  // write output over input
                 128                                 // output size is 128 bytes
             )
-            switch success
-            case 0 {
-                mstore(fillResults, 0)
-                mstore(add(fillResults, 32), 0)
-                mstore(add(fillResults, 64), 0)
-                mstore(add(fillResults, 96), 0)
-            }
-            case 1 {
+            if success {
                 mstore(fillResults, mload(fillOrderCalldata))
                 mstore(add(fillResults, 32), mload(add(fillOrderCalldata, 32)))
                 mstore(add(fillResults, 64), mload(add(fillOrderCalldata, 64)))
                 mstore(add(fillResults, 96), mload(add(fillOrderCalldata, 96)))
             }
         }
+        // fillResults values will be 0 by default if call was unsuccessful
         return fillResults;
     }
 

packages/contracts/src/2.0.0/extensions/Forwarder/MixinForwarderCore.sol

@@ -39,7 +39,6 @@ contract MixinForwarderCore is
     MExchangeWrapper,
     IForwarderCore
 {
-
     using LibBytes for bytes;
 
     /// @dev Constructor approves ERC20 proxy to transfer ZRX and WETH on this contract's behalf.
@@ -47,10 +46,12 @@ contract MixinForwarderCore is
         public
     {
         address proxyAddress = EXCHANGE.getAssetProxy(ERC20_DATA_ID);
-        if (proxyAddress != address(0)) {
-            ETHER_TOKEN.approve(proxyAddress, MAX_UINT);
-            ZRX_TOKEN.approve(proxyAddress, MAX_UINT);
-        }
+        require(
+            proxyAddress != address(0),
+            "UNREGISTERED_ASSET_PROXY"
+        );
+        ETHER_TOKEN.approve(proxyAddress, MAX_UINT);
+        ZRX_TOKEN.approve(proxyAddress, MAX_UINT);
     }
 
     /// @dev Purchases as much of orders' makerAssets as possible by selling up to 95% of transaction's ETH value.

packages/contracts/src/2.0.0/extensions/Forwarder/MixinWeth.sol

@@ -28,7 +28,6 @@ contract MixinWeth is
     LibConstants,
     MWeth
 {
-
     /// @dev Default payabale function, this allows us to withdraw WETH
     function ()
         public

packages/contracts/src/2.0.0/extensions/Forwarder/mixins/MAssets.sol

@@ -24,7 +24,6 @@ import "../interfaces/IAssets.sol";
 contract MAssets is
     IAssets
 {
-
     /// @dev Transfers given amount of asset to sender.
     /// @param assetData Byte array encoded for the respective asset proxy.
     /// @param amount Amount of asset to transfer to sender.

packages/contracts/src/2.0.0/extensions/OrderValidator/OrderValidator.sol

@@ -28,11 +28,11 @@ import "../../utils/LibBytes/LibBytes.sol";
 
 contract OrderValidator {
 
+    using LibBytes for bytes;
+
     bytes4 constant internal ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)"));
     bytes4 constant internal ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256)"));
 
-    using LibBytes for bytes;
-
     struct TraderInfo {
         uint256 makerBalance;       // Maker's balance of makerAsset
         uint256 makerAllowance;     // Maker's allowance to corresponding AssetProxy

packages/contracts/src/2.0.0/multisig/MultiSigWallet.sol

@@ -1,13 +1,14 @@
 // solhint-disable
-pragma solidity ^0.4.10;
+pragma solidity ^0.4.15;
 
 
 /// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution.
 /// @author Stefan George - <stefan.george@consensys.net>
 contract MultiSigWallet {
 
-    uint constant public MAX_OWNER_COUNT = 50;
-
+    /*
+     *  Events
+     */
     event Confirmation(address indexed sender, uint indexed transactionId);
     event Revocation(address indexed sender, uint indexed transactionId);
     event Submission(uint indexed transactionId);
@@ -18,6 +19,14 @@ contract MultiSigWallet {
     event OwnerRemoval(address indexed owner);
     event RequirementChange(uint required);
 
+    /*
+     *  Constants
+     */
+    uint constant public MAX_OWNER_COUNT = 50;
+
+    /*
+     *  Storage
+     */
     mapping (uint => Transaction) public transactions;
     mapping (uint => mapping (address => bool)) public confirmations;
     mapping (address => bool) public isOwner;
@@ -32,60 +41,54 @@ contract MultiSigWallet {
         bool executed;
     }
 
+    /*
+     *  Modifiers
+     */
     modifier onlyWallet() {
-        if (msg.sender != address(this))
-            throw;
+        require(msg.sender == address(this));
         _;
     }
 
     modifier ownerDoesNotExist(address owner) {
-        if (isOwner[owner])
-            throw;
+        require(!isOwner[owner]);
         _;
     }
 
     modifier ownerExists(address owner) {
-        if (!isOwner[owner])
-            throw;
+        require(isOwner[owner]);
         _;
     }
 
     modifier transactionExists(uint transactionId) {
-        if (transactions[transactionId].destination == 0)
-            throw;
+        require(transactions[transactionId].destination != 0);
         _;
     }
 
     modifier confirmed(uint transactionId, address owner) {
-        if (!confirmations[transactionId][owner])
-            throw;
+        require(confirmations[transactionId][owner]);
         _;
     }
 
     modifier notConfirmed(uint transactionId, address owner) {
-        if (confirmations[transactionId][owner])
-            throw;
+        require(!confirmations[transactionId][owner]);
         _;
     }
 
     modifier notExecuted(uint transactionId) {
-        if (transactions[transactionId].executed)
-            throw;
+        require(!transactions[transactionId].executed);
         _;
     }
 
     modifier notNull(address _address) {
-        if (_address == 0)
-            throw;
+        require(_address != 0);
         _;
     }
 
     modifier validRequirement(uint ownerCount, uint _required) {
-        if (   ownerCount > MAX_OWNER_COUNT
-            || _required > ownerCount
-            || _required == 0
-            || ownerCount == 0)
-            throw;
+        require(ownerCount <= MAX_OWNER_COUNT
+            && _required <= ownerCount
+            && _required != 0
+            && ownerCount != 0);
         _;
     }
 
@@ -108,8 +111,7 @@ contract MultiSigWallet {
         validRequirement(_owners.length, _required)
     {
         for (uint i=0; i<_owners.length; i++) {
-            if (isOwner[_owners[i]] || _owners[i] == 0)
-                throw;
+            require(!isOwner[_owners[i]] && _owners[i] != 0);
             isOwner[_owners[i]] = true;
         }
         owners = _owners;
@@ -151,7 +153,7 @@ contract MultiSigWallet {
 
     /// @dev Allows to replace an owner with a new owner. Transaction has to be sent by wallet.
     /// @param owner Address of owner to be replaced.
-    /// @param owner Address of new owner.
+    /// @param newOwner Address of new owner.
     function replaceOwner(address owner, address newOwner)
         public
         onlyWallet
@@ -222,20 +224,44 @@ contract MultiSigWallet {
     /// @param transactionId Transaction ID.
     function executeTransaction(uint transactionId)
         public
+        ownerExists(msg.sender)
+        confirmed(transactionId, msg.sender)
         notExecuted(transactionId)
     {
         if (isConfirmed(transactionId)) {
-            Transaction tx = transactions[transactionId];
-            tx.executed = true;
-            if (tx.destination.call.value(tx.value)(tx.data))
+            Transaction storage txn = transactions[transactionId];
+            txn.executed = true;
+            if (external_call(txn.destination, txn.value, txn.data.length, txn.data))
                 Execution(transactionId);
             else {
                 ExecutionFailure(transactionId);
-                tx.executed = false;
+                txn.executed = false;
             }
         }
     }
 
+    // call has been separated into its own function in order to take advantage
+    // of the Solidity's code generator to produce a loop that copies tx.data into memory.
+    function external_call(address destination, uint value, uint dataLength, bytes data) internal returns (bool) {
+        bool result;
+        assembly {
+            let x := mload(0x40)   // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
+            let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that
+            result := call(
+                sub(gas, 34710),   // 34710 is the value that solidity is currently emitting
+                                   // It includes callGas (700) + callVeryLow (3, to pay for SUB) + callValueTransferGas (9000) +
+                                   // callNewAccountGas (25000, in case the destination address does not exist and needs creating)
+                destination,
+                value,
+                d,
+                dataLength,        // Size of the input (in bytes) - this is what fixes the padding problem
+                x,
+                0                  // Output is ignored, therefore the output size is zero
+            )
+        }
+        return result;
+    }
+
     /// @dev Returns the confirmation status of a transaction.
     /// @param transactionId Transaction ID.
     /// @return Confirmation status.
@@ -364,4 +390,4 @@ contract MultiSigWallet {
         for (i=from; i<to; i++)
             _transactionIds[i - from] = transactionIdsTemp[i];
     }
-}
+}

packages/contracts/src/2.0.0/multisig/MultiSigWalletWithTimeLock.sol

@@ -16,47 +16,57 @@
 
 */
 
-// solhint-disable
-pragma solidity ^0.4.10;
+pragma solidity 0.4.24;
 
 import "./MultiSigWallet.sol";
 
 
 /// @title Multisignature wallet with time lock- Allows multiple parties to execute a transaction after a time lock has passed.
 /// @author Amir Bandeali - <amir@0xProject.com>
-contract MultiSigWalletWithTimeLock is MultiSigWallet {
+// solhint-disable not-rely-on-time
+contract MultiSigWalletWithTimeLock is
+    MultiSigWallet
+{
+    event ConfirmationTimeSet(uint256 indexed transactionId, uint256 confirmationTime);
+    event TimeLockChange(uint256 secondsTimeLocked);
 
-    event ConfirmationTimeSet(uint indexed transactionId, uint confirmationTime);
-    event TimeLockChange(uint secondsTimeLocked);
+    uint256 public secondsTimeLocked;
 
-    uint public secondsTimeLocked;
+    mapping (uint256 => uint256) public confirmationTimes;
 
-    mapping (uint => uint) public confirmationTimes;
-
-    modifier notFullyConfirmed(uint transactionId) {
-        require(!isConfirmed(transactionId));
+    modifier notFullyConfirmed(uint256 transactionId) {
+        require(
+            !isConfirmed(transactionId),
+            "TX_FULLY_CONFIRMED"
+        );
         _;
     }
 
-    modifier fullyConfirmed(uint transactionId) {
-        require(isConfirmed(transactionId));
+    modifier fullyConfirmed(uint256 transactionId) {
+        require(
+            isConfirmed(transactionId),
+            "TX_NOT_FULLY_CONFIRMED"
+        );
         _;
     }
 
-    modifier pastTimeLock(uint transactionId) {
-        require(block.timestamp >= confirmationTimes[transactionId] + secondsTimeLocked);
+    modifier pastTimeLock(uint256 transactionId) {
+        require(
+            block.timestamp >= confirmationTimes[transactionId] + secondsTimeLocked,
+            "TIME_LOCK_INCOMPLETE"
+        );
         _;
     }
 
-    /*
-     * Public functions
-     */
-
     /// @dev Contract constructor sets initial owners, required number of confirmations, and time lock.
     /// @param _owners List of initial owners.
     /// @param _required Number of required confirmations.
     /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
-    function MultiSigWalletWithTimeLock(address[] _owners, uint _required, uint _secondsTimeLocked)
+    constructor (
+        address[] _owners,
+        uint256 _required,
+        uint256 _secondsTimeLocked
+    )
         public
         MultiSigWallet(_owners, _required)
     {
@@ -65,17 +75,17 @@ contract MultiSigWalletWithTimeLock is MultiSigWallet {
 
     /// @dev Changes the duration of the time lock for transactions.
     /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
-    function changeTimeLock(uint _secondsTimeLocked)
+    function changeTimeLock(uint256 _secondsTimeLocked)
         public
         onlyWallet
     {
         secondsTimeLocked = _secondsTimeLocked;
-        TimeLockChange(_secondsTimeLocked);
+        emit TimeLockChange(_secondsTimeLocked);
     }
 
     /// @dev Allows an owner to confirm a transaction.
     /// @param transactionId Transaction ID.
-    function confirmTransaction(uint transactionId)
+    function confirmTransaction(uint256 transactionId)
         public
         ownerExists(msg.sender)
         transactionExists(transactionId)
@@ -83,52 +93,35 @@ contract MultiSigWalletWithTimeLock is MultiSigWallet {
         notFullyConfirmed(transactionId)
     {
         confirmations[transactionId][msg.sender] = true;
-        Confirmation(msg.sender, transactionId);
+        emit Confirmation(msg.sender, transactionId);
         if (isConfirmed(transactionId)) {
             setConfirmationTime(transactionId, block.timestamp);
         }
     }
 
-    /// @dev Allows an owner to revoke a confirmation for a transaction.
-    /// @param transactionId Transaction ID.
-    function revokeConfirmation(uint transactionId)
-        public
-        ownerExists(msg.sender)
-        confirmed(transactionId, msg.sender)
-        notExecuted(transactionId)
-        notFullyConfirmed(transactionId)
-    {
-        confirmations[transactionId][msg.sender] = false;
-        Revocation(msg.sender, transactionId);
-    }
-
     /// @dev Allows anyone to execute a confirmed transaction.
     /// @param transactionId Transaction ID.
-    function executeTransaction(uint transactionId)
+    function executeTransaction(uint256 transactionId)
         public
         notExecuted(transactionId)
         fullyConfirmed(transactionId)
         pastTimeLock(transactionId)
     {
-        Transaction storage tx = transactions[transactionId];
-        tx.executed = true;
-        if (tx.destination.call.value(tx.value)(tx.data))
-            Execution(transactionId);
-        else {
-            ExecutionFailure(transactionId);
-            tx.executed = false;
+        Transaction storage txn = transactions[transactionId];
+        txn.executed = true;
+        if (external_call(txn.destination, txn.value, txn.data.length, txn.data)) {
+            emit Execution(transactionId);
+        } else {
+            emit ExecutionFailure(transactionId);
+            txn.executed = false;
         }
     }
 
-    /*
-     * Internal functions
-     */
-
     /// @dev Sets the time of when a submission first passed.
-    function setConfirmationTime(uint transactionId, uint confirmationTime)
+    function setConfirmationTime(uint256 transactionId, uint256 confirmationTime)
         internal
     {
         confirmationTimes[transactionId] = confirmationTime;
-        ConfirmationTimeSet(transactionId, confirmationTime);
+        emit ConfirmationTimeSet(transactionId, confirmationTime);
     }
 }

packages/contracts/src/2.0.0/protocol/AssetProxy/ERC20Proxy.sol

@@ -18,7 +18,6 @@
 
 pragma solidity 0.4.24;
 
-import "../../utils/LibBytes/LibBytes.sol";
 import "./MixinAuthorizable.sol";
 
 
@@ -59,15 +58,64 @@ contract ERC20Proxy is
                     mstore(96, 0)
                     revert(0, 100)
                 }
-                
-                /////// Token contract address ///////
-                // The token address is found as follows:
-                // * It is stored at offset 4 in `assetData` contents.
-                // * This is stored at offset 32 from `assetData`.
-                // * The offset to `assetData` from Params is stored at offset
-                //   4 in calldata.
-                // * The offset of Params in calldata is 4.
-                // So we read location 4 and add 32 + 4 + 4 to it.
+
+                // `transferFrom`.
+                // The function is marked `external`, so no abi decodeding is done for
+                // us. Instead, we expect the `calldata` memory to contain the
+                // following:
+                //
+                // | Area     | Offset | Length  | Contents                            |
+                // |----------|--------|---------|-------------------------------------|
+                // | Header   | 0      | 4       | function selector                   |
+                // | Params   |        | 4 * 32  | function parameters:                |
+                // |          | 4      |         |   1. offset to assetData (*)        |
+                // |          | 36     |         |   2. from                           |
+                // |          | 68     |         |   3. to                             |
+                // |          | 100    |         |   4. amount                         |
+                // | Data     |        |         | assetData:                          |
+                // |          | 132    | 32      | assetData Length                    |
+                // |          | 164    | **      | assetData Contents                  |
+                //
+                // (*): offset is computed from start of function parameters, so offset
+                //      by an additional 4 bytes in the calldata.
+                //
+                // (**): see table below to compute length of assetData Contents
+                //
+                // WARNING: The ABIv2 specification allows additional padding between
+                //          the Params and Data section. This will result in a larger
+                //          offset to assetData.
+
+                // Asset data itself is encoded as follows:
+                //
+                // | Area     | Offset | Length  | Contents                            |
+                // |----------|--------|---------|-------------------------------------|
+                // | Header   | 0      | 4       | function selector                   |
+                // | Params   |        | 1 * 32  | function parameters:                |
+                // |          | 4      | 12 + 20 |   1. token address                  |
+
+                // We construct calldata for the `token.transferFrom` ABI.
+                // The layout of this calldata is in the table below.
+                //
+                // | Area     | Offset | Length  | Contents                            |
+                // |----------|--------|---------|-------------------------------------|
+                // | Header   | 0      | 4       | function selector                   |
+                // | Params   |        | 3 * 32  | function parameters:                |
+                // |          | 4      |         |   1. from                           |
+                // |          | 36     |         |   2. to                             |
+                // |          | 68     |         |   3. amount                         |
+
+                /////// Read token address from calldata ///////
+                // * The token address is stored in `assetData`.
+                //
+                // * The "offset to assetData" is stored at offset 4 in the calldata (table 1).
+                //   [assetDataOffsetFromParams = calldataload(4)]
+                //
+                // * Notes that the "offset to assetData" is relative to the "Params" area of calldata;
+                //   add 4 bytes to account for the length of the "Header" area (table 1).
+                //   [assetDataOffsetFromHeader = assetDataOffsetFromParams + 4]
+                //
+                // * The "token address" is offset 32+4=36 bytes into "assetData" (tables 1 & 2).
+                //   [tokenOffset = assetDataOffsetFromHeader + 36 = calldataload(4) + 4 + 36]
                 let token := calldataload(add(calldataload(4), 40))
                 
                 /////// Setup Header Area ///////

packages/contracts/src/2.0.0/protocol/AssetProxy/ERC721Proxy.sol

@@ -18,7 +18,6 @@
 
 pragma solidity 0.4.24;
 
-import "../../utils/LibBytes/LibBytes.sol";
 import "./MixinAuthorizable.sol";
 
 
@@ -80,6 +79,8 @@ contract ERC721Proxy is
                 // (*): offset is computed from start of function parameters, so offset
                 //      by an additional 4 bytes in the calldata.
                 //
+                // (**): see table below to compute length of assetData Contents
+                //
                 // WARNING: The ABIv2 specification allows additional padding between
                 //          the Params and Data section. This will result in a larger
                 //          offset to assetData.

packages/contracts/src/2.0.0/protocol/AssetProxy/MixinAuthorizable.sol

@@ -26,7 +26,6 @@ contract MixinAuthorizable is
     Ownable,
     MAuthorizable
 {
-
     /// @dev Only authorized addresses can invoke functions with this modifier.
     modifier onlyAuthorized {
         require(

packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAssetProxy.sol

@@ -24,7 +24,6 @@ import "./IAuthorizable.sol";
 contract IAssetProxy is
     IAuthorizable
 {
-
     /// @dev Transfers assets. Either succeeds or throws.
     /// @param assetData Byte array encoded for the respective asset proxy.
     /// @param from Address to transfer asset from.

packages/contracts/src/2.0.0/protocol/AssetProxy/interfaces/IAuthorizable.sol

@@ -24,7 +24,6 @@ import "../../../utils/Ownable/IOwnable.sol";
 contract IAuthorizable is
     IOwnable
 {
-
     /// @dev Authorizes an address.
     /// @param target Address to authorize.
     function addAuthorizedAddress(address target)

packages/contracts/src/2.0.0/protocol/AssetProxy/mixins/MAuthorizable.sol

@@ -24,7 +24,6 @@ import "../interfaces/IAuthorizable.sol";
 contract MAuthorizable is
     IAuthorizable
 {
-
     // Event logged when a new address is authorized.
     event AuthorizedAddressAdded(
         address indexed target,

packages/contracts/src/2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol

@@ -16,14 +16,16 @@
 
 */
 
-pragma solidity 0.4.10;
+pragma solidity 0.4.24;
 
 import "../../multisig/MultiSigWalletWithTimeLock.sol";
+import "../../utils/LibBytes/LibBytes.sol";
 
 
 contract AssetProxyOwner is
     MultiSigWalletWithTimeLock
 {
+    using LibBytes for bytes;
 
     event AssetProxyRegistration(address assetProxyContract, bool isRegistered);
 
@@ -36,9 +38,15 @@ contract AssetProxyOwner is
     /// @dev Function will revert if the transaction does not call `removeAuthorizedAddressAtIndex`
     ///      on an approved AssetProxy contract.
     modifier validRemoveAuthorizedAddressAtIndexTx(uint256 transactionId) {
-        Transaction storage tx = transactions[transactionId];
-        require(isAssetProxyRegistered[tx.destination]);
-        require(readBytes4(tx.data, 0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR);
+        Transaction storage txn = transactions[transactionId];
+        require(
+            isAssetProxyRegistered[txn.destination],
+            "UNREGISTERED_ASSET_PROXY"
+        );
+        require(
+            txn.data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR,
+            "INVALID_FUNCTION_SELECTOR"
+        );
         _;
     }
 
@@ -48,7 +56,7 @@ contract AssetProxyOwner is
     /// @param _assetProxyContracts Array of AssetProxy contract addresses.
     /// @param _required Number of required confirmations.
     /// @param _secondsTimeLocked Duration needed after a transaction is confirmed and before it becomes executable, in seconds.
-    function AssetProxyOwner(
+    constructor (
         address[] memory _owners,
         address[] memory _assetProxyContracts,
         uint256 _required,
@@ -59,7 +67,10 @@ contract AssetProxyOwner is
     {
         for (uint256 i = 0; i < _assetProxyContracts.length; i++) {
             address assetProxy = _assetProxyContracts[i];
-            require(assetProxy != address(0));
+            require(
+                assetProxy != address(0),
+                "INVALID_ASSET_PROXY"
+            );
             isAssetProxyRegistered[assetProxy] = true;
         }
     }
@@ -74,7 +85,7 @@ contract AssetProxyOwner is
         notNull(assetProxyContract)
     {
         isAssetProxyRegistered[assetProxyContract] = isRegistered;
-        AssetProxyRegistration(assetProxyContract, isRegistered);
+        emit AssetProxyRegistration(assetProxyContract, isRegistered);
     }
 
     /// @dev Allows execution of `removeAuthorizedAddressAtIndex` without time lock.
@@ -85,35 +96,13 @@ contract AssetProxyOwner is
         fullyConfirmed(transactionId)
         validRemoveAuthorizedAddressAtIndexTx(transactionId)
     {
-        Transaction storage tx = transactions[transactionId];
-        tx.executed = true;
-        // solhint-disable-next-line avoid-call-value
-        if (tx.destination.call.value(tx.value)(tx.data))
-            Execution(transactionId);
-        else {
-            ExecutionFailure(transactionId);
-            tx.executed = false;
+        Transaction storage txn = transactions[transactionId];
+        txn.executed = true;
+        if (external_call(txn.destination, txn.value, txn.data.length, txn.data)) {
+            emit Execution(transactionId);
+        } else {
+            emit ExecutionFailure(transactionId);
+            txn.executed = false;
         }
     }
-
-    /// @dev Reads an unpadded bytes4 value from a position in a byte array.
-    /// @param b Byte array containing a bytes4 value.
-    /// @param index Index in byte array of bytes4 value.
-    /// @return bytes4 value from byte array.
-    function readBytes4(
-        bytes memory b,
-        uint256 index
-    )
-        internal
-        returns (bytes4 result)
-    {
-        require(b.length >= index + 4);
-        assembly {
-            result := mload(add(b, 32))
-            // Solidity does not require us to clean the trailing bytes.
-            // We do it anyway
-            result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000)
-        }
-        return result;
-    }
 }

packages/contracts/src/2.0.0/protocol/Exchange/Exchange.sol

@@ -37,7 +37,6 @@ contract Exchange is
     MixinAssetProxyDispatcher,
     MixinWrapperFunctions
 {
-
     string constant public VERSION = "2.0.1-alpha";
 
     // Mixins are instantiated in the order they are inherited

packages/contracts/src/2.0.0/protocol/Exchange/MixinAssetProxyDispatcher.sol

@@ -19,7 +19,6 @@
 pragma solidity 0.4.24;
 
 import "../../utils/Ownable/Ownable.sol";
-import "../../utils/LibBytes/LibBytes.sol";
 import "./mixins/MAssetProxyDispatcher.sol";
 import "../AssetProxy/interfaces/IAssetProxy.sol";
 
@@ -28,8 +27,6 @@ contract MixinAssetProxyDispatcher is
     Ownable,
     MAssetProxyDispatcher
 {
-    using LibBytes for bytes;
-    
     // Mapping from Asset Proxy Id's to their respective Asset Proxy
     mapping (bytes4 => IAssetProxy) public assetProxies;
 
@@ -90,7 +87,7 @@ contract MixinAssetProxyDispatcher is
                 "LENGTH_GREATER_THAN_3_REQUIRED"
             );
             
-            // Lookup assetProxy
+            // Lookup assetProxy. We do not use `LibBytes.readBytes4` for gas efficiency reasons.
             bytes4 assetProxyId;
             assembly {
                 assetProxyId := and(mload(

packages/contracts/src/2.0.0/protocol/Exchange/MixinExchangeCore.sol

@@ -75,7 +75,11 @@ contract MixinExchangeCore is
 
         // Update orderEpoch
         orderEpoch[makerAddress][senderAddress] = newOrderEpoch;
-        emit CancelUpTo(makerAddress, senderAddress, newOrderEpoch);
+        emit CancelUpTo(
+            makerAddress,
+            senderAddress,
+            newOrderEpoch
+        );
     }
 
     /// @dev Fills the input order.
@@ -107,14 +111,7 @@ contract MixinExchangeCore is
         public
         nonReentrant
     {
-        // Fetch current order status
-        OrderInfo memory orderInfo = getOrderInfo(order);
-
-        // Validate context
-        assertValidCancel(order, orderInfo);
-
-        // Perform cancel
-        updateCancelledState(order, orderInfo.orderHash);
+        cancelOrderInternal(order);
     }
 
     /// @dev Gets information about an order: status, hash, and amount filled.
@@ -231,11 +228,31 @@ contract MixinExchangeCore is
         );
     
         // Settle order
-        settleOrder(order, takerAddress, fillResults);
+        settleOrder(
+            order,
+            takerAddress,
+            fillResults
+        );
 
         return fillResults;
     }
 
+    /// @dev After calling, the order can not be filled anymore.
+    ///      Throws if order is invalid or sender does not have permission to cancel.
+    /// @param order Order to cancel. Order must be OrderStatus.FILLABLE.
+    function cancelOrderInternal(Order memory order)
+        internal
+    {
+        // Fetch current order status
+        OrderInfo memory orderInfo = getOrderInfo(order);
+
+        // Validate context
+        assertValidCancel(order, orderInfo);
+
+        // Perform cancel
+        updateCancelledState(order, orderInfo.orderHash);
+    }
+
     /// @dev Updates state with results of a fill order.
     /// @param order that was filled.
     /// @param takerAddress Address of taker who filled the order.
@@ -404,16 +421,6 @@ contract MixinExchangeCore is
             safeMul(order.makerAssetAmount, takerAssetFilledAmount),
             "INVALID_FILL_PRICE"
         );
-        
-        // Validate fill order rounding
-        require(
-            !isRoundingErrorFloor(
-                takerAssetFilledAmount,
-                order.takerAssetAmount,
-                order.makerAssetAmount
-            ),
-            "ROUNDING_ERROR"
-        );
     }
 
     /// @dev Validates context for cancelOrder. Succeeds or throws.
@@ -463,17 +470,17 @@ contract MixinExchangeCore is
     {
         // Compute proportional transfer amounts
         fillResults.takerAssetFilledAmount = takerAssetFilledAmount;
-        fillResults.makerAssetFilledAmount = getPartialAmountFloor(
+        fillResults.makerAssetFilledAmount = safeGetPartialAmountFloor(
             takerAssetFilledAmount,
             order.takerAssetAmount,
             order.makerAssetAmount
         );
-        fillResults.makerFeePaid = getPartialAmountFloor(
-            takerAssetFilledAmount,
-            order.takerAssetAmount,
+        fillResults.makerFeePaid = safeGetPartialAmountFloor(
+            fillResults.makerAssetFilledAmount,
+            order.makerAssetAmount,
             order.makerFee
         );
-        fillResults.takerFeePaid = getPartialAmountFloor(
+        fillResults.takerFeePaid = safeGetPartialAmountFloor(
             takerAssetFilledAmount,
             order.takerAssetAmount,
             order.takerFee

packages/contracts/src/2.0.0/protocol/Exchange/MixinMatchOrders.sol

@@ -177,13 +177,13 @@ contract MixinMatchOrders is
     {
         // Derive maker asset amounts for left & right orders, given store taker assert amounts
         uint256 leftTakerAssetAmountRemaining = safeSub(leftOrder.takerAssetAmount, leftOrderTakerAssetFilledAmount);
-        uint256 leftMakerAssetAmountRemaining = getPartialAmountFloor(
+        uint256 leftMakerAssetAmountRemaining = safeGetPartialAmountFloor(
             leftOrder.makerAssetAmount,
             leftOrder.takerAssetAmount,
             leftTakerAssetAmountRemaining
         );
         uint256 rightTakerAssetAmountRemaining = safeSub(rightOrder.takerAssetAmount, rightOrderTakerAssetFilledAmount);
-        uint256 rightMakerAssetAmountRemaining = getPartialAmountFloor(
+        uint256 rightMakerAssetAmountRemaining = safeGetPartialAmountFloor(
             rightOrder.makerAssetAmount,
             rightOrder.takerAssetAmount,
             rightTakerAssetAmountRemaining
@@ -205,7 +205,7 @@ contract MixinMatchOrders is
             matchedFillResults.left.takerAssetFilledAmount = matchedFillResults.right.makerAssetFilledAmount;
             // Round down to ensure the maker's exchange rate does not exceed the price specified by the order. 
             // We favor the maker when the exchange rate must be rounded.
-            matchedFillResults.left.makerAssetFilledAmount = getPartialAmountFloor(
+            matchedFillResults.left.makerAssetFilledAmount = safeGetPartialAmountFloor(
                 leftOrder.makerAssetAmount,
                 leftOrder.takerAssetAmount,
                 matchedFillResults.left.takerAssetFilledAmount
@@ -217,7 +217,7 @@ contract MixinMatchOrders is
             matchedFillResults.right.makerAssetFilledAmount = matchedFillResults.left.takerAssetFilledAmount;
             // Round up to ensure the maker's exchange rate does not exceed the price specified by the order.
             // We favor the maker when the exchange rate must be rounded.
-            matchedFillResults.right.takerAssetFilledAmount = getPartialAmountCeil(
+            matchedFillResults.right.takerAssetFilledAmount = safeGetPartialAmountCeil(
                 rightOrder.takerAssetAmount,
                 rightOrder.makerAssetAmount,
                 matchedFillResults.right.makerAssetFilledAmount
@@ -231,24 +231,24 @@ contract MixinMatchOrders is
         );
 
         // Compute fees for left order
-        matchedFillResults.left.makerFeePaid = getPartialAmountFloor(
+        matchedFillResults.left.makerFeePaid = safeGetPartialAmountFloor(
             matchedFillResults.left.makerAssetFilledAmount,
             leftOrder.makerAssetAmount,
             leftOrder.makerFee
         );
-        matchedFillResults.left.takerFeePaid = getPartialAmountFloor(
+        matchedFillResults.left.takerFeePaid = safeGetPartialAmountFloor(
             matchedFillResults.left.takerAssetFilledAmount,
             leftOrder.takerAssetAmount,
             leftOrder.takerFee
         );
 
         // Compute fees for right order
-        matchedFillResults.right.makerFeePaid = getPartialAmountFloor(
+        matchedFillResults.right.makerFeePaid = safeGetPartialAmountFloor(
             matchedFillResults.right.makerAssetFilledAmount,
             rightOrder.makerAssetAmount,
             rightOrder.makerFee
         );
-        matchedFillResults.right.takerFeePaid = getPartialAmountFloor(
+        matchedFillResults.right.takerFeePaid = safeGetPartialAmountFloor(
             matchedFillResults.right.takerAssetFilledAmount,
             rightOrder.takerAssetAmount,
             rightOrder.takerFee

packages/contracts/src/2.0.0/protocol/Exchange/MixinSignatureValidator.sol

@@ -251,7 +251,7 @@ contract MixinSignatureValidator is
                 walletAddress,    // address of Wallet contract
                 cdStart,          // pointer to start of input
                 mload(calldata),  // length of input
-                cdStart,          // write input over output
+                cdStart,          // write output over input
                 32                // output size is 32 bytes
             )
 
@@ -301,7 +301,7 @@ contract MixinSignatureValidator is
                 validatorAddress,  // address of Validator contract
                 cdStart,           // pointer to start of input
                 mload(calldata),   // length of input
-                cdStart,           // write input over output
+                cdStart,           // write output over input
                 32                 // output size is 32 bytes
             )
 

packages/contracts/src/2.0.0/protocol/Exchange/MixinTransactions.sol

@@ -28,7 +28,6 @@ contract MixinTransactions is
     MSignatureValidator,
     MTransactions
 {
-
     // Mapping of transaction hash => executed
     // This prevents transactions from being executed more than once.
     mapping (bytes32 => bool) public transactions;
@@ -36,15 +35,6 @@ contract MixinTransactions is
     // Address of current transaction signer
     address public currentContextAddress;
 
-    // Hash for the EIP712 ZeroEx Transaction Schema
-    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
-        "ZeroExTransaction(",
-        "uint256 salt,",
-        "address signerAddress,",
-        "bytes data",
-        ")"
-    ));
-
     /// @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.

packages/contracts/src/2.0.0/protocol/Exchange/MixinWrapperFunctions.sol

@@ -36,7 +36,6 @@ contract MixinWrapperFunctions is
     MExchangeCore,
     MWrapperFunctions
 {
-
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.
@@ -82,7 +81,7 @@ contract MixinWrapperFunctions is
         // Delegate to `fillOrder` and handle any exceptions gracefully
         assembly {
             let success := delegatecall(
-                gas,                                // forward all gas, TODO: look into gas consumption of assert/throw
+                gas,                                // forward all gas
                 address,                            // call address of this contract
                 add(fillOrderCalldata, 32),         // pointer to start of input (skip array length in first 32 bytes)
                 mload(fillOrderCalldata),           // length of input
@@ -96,6 +95,7 @@ contract MixinWrapperFunctions is
                 mstore(add(fillResults, 96), mload(add(fillOrderCalldata, 96)))
             }
         }
+        // fillResults values will be 0 by default if call was unsuccessful
         return fillResults;
     }
 
@@ -376,10 +376,11 @@ contract MixinWrapperFunctions is
     /// @param orders Array of order specifications.
     function batchCancelOrders(LibOrder.Order[] memory orders)
         public
+        nonReentrant
     {
         uint256 ordersLength = orders.length;
         for (uint256 i = 0; i != ordersLength; i++) {
-            cancelOrder(orders[i]);
+            cancelOrderInternal(orders[i]);
         }
     }
 

packages/contracts/src/2.0.0/protocol/Exchange/libs/LibEIP712.sol

@@ -20,6 +20,7 @@ pragma solidity 0.4.24;
 
 
 contract LibEIP712 {
+
     // EIP191 header for EIP712 prefix
     string constant internal EIP191_HEADER = "\x19\x01";
 

packages/contracts/src/2.0.0/protocol/Exchange/libs/LibFillResults.sol

@@ -24,7 +24,6 @@ import "../../../utils/SafeMath/SafeMath.sol";
 contract LibFillResults is
     SafeMath
 {
-
     struct FillResults {
         uint256 makerAssetFilledAmount;  // Total amount of makerAsset(s) filled.
         uint256 takerAssetFilledAmount;  // Total amount of takerAsset(s) filled.

packages/contracts/src/2.0.0/protocol/Exchange/libs/LibMath.sol

@@ -24,6 +24,83 @@ import "../../../utils/SafeMath/SafeMath.sol";
 contract LibMath is
     SafeMath
 {
+    /// @dev Calculates partial value given a numerator and denominator rounded down.
+    ///      Reverts if rounding error is >= 0.1%
+    /// @param numerator Numerator.
+    /// @param denominator Denominator.
+    /// @param target Value to calculate partial of.
+    /// @return Partial value of target rounded down.
+    function safeGetPartialAmountFloor(
+        uint256 numerator,
+        uint256 denominator,
+        uint256 target
+    )
+        internal
+        pure
+        returns (uint256 partialAmount)
+    {
+        require(
+            denominator > 0,
+            "DIVISION_BY_ZERO"
+        );
+
+        require(
+            !isRoundingErrorFloor(
+                numerator,
+                denominator,
+                target
+            ),
+            "ROUNDING_ERROR"
+        );
+        
+        partialAmount = safeDiv(
+            safeMul(numerator, target),
+            denominator
+        );
+        return partialAmount;
+    }
+
+    /// @dev Calculates partial value given a numerator and denominator rounded down.
+    ///      Reverts if rounding error is >= 0.1%
+    /// @param numerator Numerator.
+    /// @param denominator Denominator.
+    /// @param target Value to calculate partial of.
+    /// @return Partial value of target rounded up.
+    function safeGetPartialAmountCeil(
+        uint256 numerator,
+        uint256 denominator,
+        uint256 target
+    )
+        internal
+        pure
+        returns (uint256 partialAmount)
+    {
+        require(
+            denominator > 0,
+            "DIVISION_BY_ZERO"
+        );
+
+        require(
+            !isRoundingErrorCeil(
+                numerator,
+                denominator,
+                target
+            ),
+            "ROUNDING_ERROR"
+        );
+        
+        // safeDiv computes `floor(a / b)`. We use the identity (a, b integer):
+        //       ceil(a / b) = floor((a + b - 1) / b)
+        // To implement `ceil(a / b)` using safeDiv.
+        partialAmount = safeDiv(
+            safeAdd(
+                safeMul(numerator, target),
+                safeSub(denominator, 1)
+            ),
+            denominator
+        );
+        return partialAmount;
+    }
 
     /// @dev Calculates partial value given a numerator and denominator rounded down.
     /// @param numerator Numerator.
@@ -43,7 +120,7 @@ contract LibMath is
             denominator > 0,
             "DIVISION_BY_ZERO"
         );
-        
+
         partialAmount = safeDiv(
             safeMul(numerator, target),
             denominator
@@ -69,7 +146,7 @@ contract LibMath is
             denominator > 0,
             "DIVISION_BY_ZERO"
         );
-        
+
         // safeDiv computes `floor(a / b)`. We use the identity (a, b integer):
         //       ceil(a / b) = floor((a + b - 1) / b)
         // To implement `ceil(a / b)` using safeDiv.
@@ -128,7 +205,11 @@ contract LibMath is
         //        1000 * remainder  <  numerator * target
         // so we have a rounding error iff:
         //        1000 * remainder  >=  numerator * target
-        uint256 remainder = mulmod(target, numerator, denominator);
+        uint256 remainder = mulmod(
+            target,
+            numerator,
+            denominator
+        );
         isError = safeMul(1000, remainder) >= safeMul(numerator, target);
         return isError;
     }
@@ -160,8 +241,11 @@ contract LibMath is
             return false;
         }
         // Compute remainder as before
-        uint256 remainder = mulmod(target, numerator, denominator);
-        // TODO: safeMod
+        uint256 remainder = mulmod(
+            target,
+            numerator,
+            denominator
+        );
         remainder = safeSub(denominator, remainder) % denominator;
         isError = safeMul(1000, remainder) >= safeMul(numerator, target);
         return isError;

packages/contracts/src/2.0.0/protocol/Exchange/libs/LibOrder.sol

@@ -24,7 +24,6 @@ import "./LibEIP712.sol";
 contract LibOrder is
     LibEIP712
 {
-
     // Hash for the EIP712 Order Schema
     bytes32 constant internal EIP712_ORDER_SCHEMA_HASH = keccak256(abi.encodePacked(
         "Order(",

packages/contracts/src/2.0.0/protocol/Exchange/mixins/MAssetProxyDispatcher.sol

@@ -24,7 +24,6 @@ import "../interfaces/IAssetProxyDispatcher.sol";
 contract MAssetProxyDispatcher is
     IAssetProxyDispatcher
 {
-
     // Logs registration of new asset proxy
     event AssetProxyRegistered(
         bytes4 id,              // Id of new registered AssetProxy.

packages/contracts/src/2.0.0/protocol/Exchange/mixins/MExchangeCore.sol

@@ -72,6 +72,11 @@ contract MExchangeCore is
         internal
         returns (LibFillResults.FillResults memory fillResults);
 
+    /// @dev After calling, the order can not be filled anymore.
+    /// @param order Order struct containing order specifications.
+    function cancelOrderInternal(LibOrder.Order memory order)
+        internal;
+
     /// @dev Updates state with results of a fill order.
     /// @param order that was filled.
     /// @param takerAddress Address of taker who filled the order.

packages/contracts/src/2.0.0/protocol/Exchange/mixins/MMatchOrders.sol

@@ -26,7 +26,6 @@ import "../interfaces/IMatchOrders.sol";
 contract MMatchOrders is
     IMatchOrders
 {
-
     /// @dev Validates context for matchOrders. Succeeds or throws.
     /// @param leftOrder First order to match.
     /// @param rightOrder Second order to match.

packages/contracts/src/2.0.0/protocol/Exchange/mixins/MTransactions.sol

@@ -23,6 +23,28 @@ import "../interfaces/ITransactions.sol";
 contract MTransactions is
     ITransactions
 {
+    // Hash for the EIP712 ZeroEx Transaction Schema
+    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = keccak256(abi.encodePacked(
+        "ZeroExTransaction(",
+        "uint256 salt,",
+        "address signerAddress,",
+        "bytes data",
+        ")"
+    ));
+
+    /// @dev Calculates EIP712 hash of the Transaction.
+    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+    /// @param signerAddress Address of transaction signer.
+    /// @param data AbiV2 encoded calldata.
+    /// @return EIP712 hash of the Transaction.
+    function hashZeroExTransaction(
+        uint256 salt,
+        address signerAddress,
+        bytes memory data
+    )
+        internal
+        pure
+        returns (bytes32 result);
 
     /// @dev The current function will be called in the context of this address (either 0x transaction signer or `msg.sender`).
     ///      If calling a fill function, this address will represent the taker.

packages/contracts/src/2.0.0/protocol/Exchange/mixins/MWrapperFunctions.sol

@@ -24,8 +24,9 @@ import "../libs/LibFillResults.sol";
 import "../interfaces/IWrapperFunctions.sol";
 
 
-contract MWrapperFunctions {
-
+contract MWrapperFunctions is 
+    IWrapperFunctions
+{
     /// @dev Fills the input order. Reverts if exact takerAssetFillAmount not filled.
     /// @param order LibOrder.Order struct containing order specifications.
     /// @param takerAssetFillAmount Desired amount of takerAsset to sell.

packages/contracts/src/2.0.0/test/DummyERC20Token/DummyMultipleReturnERC20Token.sol

@@ -0,0 +1,69 @@
+/*
+
+  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 0.4.24;
+
+import "./DummyERC20Token.sol";
+
+
+// solhint-disable no-empty-blocks
+contract DummyMultipleReturnERC20Token is
+    DummyERC20Token
+{
+    constructor (
+        string _name,
+        string _symbol,
+        uint256 _decimals,
+        uint256 _totalSupply
+    )
+        public
+        DummyERC20Token(
+            _name,
+            _symbol,
+            _decimals,
+            _totalSupply
+        )
+    {}
+
+    /// @dev send `value` token to `to` from `from` on the condition it is approved by `from`
+    /// @param _from The address of the sender
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    function transferFrom(
+        address _from,
+        address _to,
+        uint256 _value
+    )
+        external
+        returns (bool)
+    {
+        emit Transfer(
+            _from,
+            _to,
+            _value
+        );
+
+        // HACK: This contract will not compile if we remove `returns (bool)`, so we manually return 64 bytes (equiavalent to true, true)
+        assembly {
+            mstore(0, 1)
+            mstore(32, 1)
+            return(0, 64)
+        }
+    }
+}
+

packages/contracts/src/2.0.0/test/DummyERC20Token/DummyNoReturnERC20Token.sol

@@ -25,7 +25,6 @@ import "./DummyERC20Token.sol";
 contract DummyNoReturnERC20Token is
     DummyERC20Token
 {
-
     constructor (
         string _name,
         string _symbol,

packages/contracts/src/2.0.0/test/DummyERC721Receiver/DummyERC721Receiver.sol

@@ -24,7 +24,6 @@ import "../../tokens/ERC721Token/IERC721Receiver.sol";
 contract DummyERC721Receiver is
     IERC721Receiver
 {
-
     // Function selector for ERC721Receiver.onERC721Received
     // 0x150b7a02
     bytes4 constant internal ERC721_RECEIVED = bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"));

packages/contracts/src/2.0.0/test/ReentrantERC20Token/ReentrantERC20Token.sol

@@ -25,10 +25,10 @@ import "../../protocol/Exchange/interfaces/IExchange.sol";
 import "../../protocol/Exchange/libs/LibOrder.sol";
 
 
+// solhint-disable no-unused-vars
 contract ReentrantERC20Token is
     ERC20Token
 {
-
     using LibBytes for bytes;
 
     // solhint-disable-next-line var-name-mixedcase
@@ -50,6 +50,7 @@ contract ReentrantERC20Token is
         MARKET_SELL_ORDERS,
         MATCH_ORDERS,
         CANCEL_ORDER,
+        BATCH_CANCEL_ORDERS,
         CANCEL_ORDERS_UP_TO,
         SET_SIGNATURE_VALIDATOR_APPROVAL
     }
@@ -149,6 +150,11 @@ contract ReentrantERC20Token is
                 EXCHANGE.cancelOrder.selector,
                 order
             );
+        } else if (currentFunctionId == uint8(ExchangeFunction.BATCH_CANCEL_ORDERS)) {
+            calldata = abi.encodeWithSelector(
+                EXCHANGE.batchCancelOrders.selector,
+                orders
+            );
         } else if (currentFunctionId == uint8(ExchangeFunction.CANCEL_ORDERS_UP_TO)) {
             calldata = abi.encodeWithSelector(
                 EXCHANGE.cancelOrdersUpTo.selector,

packages/contracts/src/2.0.0/test/TestAssetProxyOwner/TestAssetProxyOwner.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.10;
+pragma solidity 0.4.24;
 
 import "../../protocol/AssetProxyOwner/AssetProxyOwner.sol";
 
@@ -25,8 +25,7 @@ import "../../protocol/AssetProxyOwner/AssetProxyOwner.sol";
 contract TestAssetProxyOwner is
     AssetProxyOwner
 {
-
-    function TestAssetProxyOwner(
+    constructor (
         address[] memory _owners,
         address[] memory _assetProxyContracts,
         uint256 _required,
@@ -38,6 +37,7 @@ contract TestAssetProxyOwner is
     
     function testValidRemoveAuthorizedAddressAtIndexTx(uint256 id)
         public
+        view
         validRemoveAuthorizedAddressAtIndexTx(id)
         returns (bool)
     {
@@ -50,23 +50,9 @@ contract TestAssetProxyOwner is
     /// @return Successful if data is a call to `removeAuthorizedAddressAtIndex`.
     function isFunctionRemoveAuthorizedAddressAtIndex(bytes memory data)
         public
+        pure
         returns (bool)
     {
-        return readBytes4(data, 0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR;
-    }
-
-    /// @dev Reads an unpadded bytes4 value from a position in a byte array.
-    /// @param b Byte array containing a bytes4 value.
-    /// @param index Index in byte array of bytes4 value.
-    /// @return bytes4 value from byte array.
-    function publicReadBytes4(
-        bytes memory b,
-        uint256 index
-    )
-        public
-        returns (bytes4 result)
-    {
-        result = readBytes4(b, index);
-        return result;
+        return data.readBytes4(0) == REMOVE_AUTHORIZED_ADDRESS_AT_INDEX_SELECTOR;
     }
 }

packages/contracts/src/2.0.0/test/TestExchangeInternals/TestExchangeInternals.sol

@@ -62,6 +62,42 @@ contract TestExchangeInternals is
         return calculateFillResults(order, takerAssetFilledAmount);
     }
 
+    /// @dev Calculates partial value given a numerator and denominator.
+    ///      Reverts if rounding error is >= 0.1%
+    /// @param numerator Numerator.
+    /// @param denominator Denominator.
+    /// @param target Value to calculate partial of.
+    /// @return Partial value of target.
+    function publicSafeGetPartialAmountFloor(
+        uint256 numerator,
+        uint256 denominator,
+        uint256 target
+    )
+        public
+        pure
+        returns (uint256 partialAmount)
+    {
+        return safeGetPartialAmountFloor(numerator, denominator, target);
+    }
+
+    /// @dev Calculates partial value given a numerator and denominator.
+    ///      Reverts if rounding error is >= 0.1%
+    /// @param numerator Numerator.
+    /// @param denominator Denominator.
+    /// @param target Value to calculate partial of.
+    /// @return Partial value of target.
+    function publicSafeGetPartialAmountCeil(
+        uint256 numerator,
+        uint256 denominator,
+        uint256 target
+    )
+        public
+        pure
+        returns (uint256 partialAmount)
+    {
+        return safeGetPartialAmountCeil(numerator, denominator, target);
+    }
+
     /// @dev Calculates partial value given a numerator and denominator.
     /// @param numerator Numerator.
     /// @param denominator Denominator.

packages/contracts/src/2.0.0/test/TestLibs/TestLibs.sol

@@ -31,7 +31,6 @@ contract TestLibs is
     LibFillResults,
     LibAbiEncoder
 {
-
     function publicAbiEncodeFillOrder(
         Order memory order,
         uint256 takerAssetFillAmount,

packages/contracts/src/2.0.0/test/TestSignatureValidator/TestSignatureValidator.sol

@@ -26,7 +26,6 @@ contract TestSignatureValidator is
     MixinSignatureValidator,
     MixinTransactions
 {
-
     function publicIsValidSignature(
         bytes32 hash,
         address signer,

packages/contracts/src/2.0.0/tokens/ERC20Token/ERC20Token.sol

@@ -24,7 +24,6 @@ import "./IERC20Token.sol";
 contract ERC20Token is
     IERC20Token
 {
-
     mapping (address => uint256) internal balances;
     mapping (address => mapping (address => uint256)) internal allowed;
 

packages/contracts/src/2.0.0/tokens/ERC20Token/MintableERC20Token.sol

@@ -26,7 +26,6 @@ contract MintableERC20Token is
     SafeMath,
     UnlimitedAllowanceERC20Token
 {
-
     /// @dev Mints new tokens
     /// @param _to Address of the beneficiary that will own the minted token
     /// @param _value Amount of tokens to mint

packages/contracts/src/2.0.0/tokens/ERC20Token/UnlimitedAllowanceERC20Token.sol

@@ -24,7 +24,6 @@ import "../ERC20Token/ERC20Token.sol";
 contract UnlimitedAllowanceERC20Token is
     ERC20Token
 {
-
     uint256 constant internal MAX_UINT = 2**256 - 1;
 
     /// @dev ERC20 transferFrom, modified such that an allowance of MAX_UINT represents an unlimited allowance. See https://github.com/ethereum/EIPs/issues/717

packages/contracts/src/2.0.0/tokens/ERC721Token/MintableERC721Token.sol

@@ -24,7 +24,6 @@ import "./ERC721Token.sol";
 contract MintableERC721Token is
     ERC721Token
 {
-
     /// @dev Function to mint a new token
     ///      Reverts if the given token ID already exists
     /// @param _to Address of the beneficiary that will own the minted token