Publish

- 0x.js@6.0.10
 - @0x/asset-buyer@6.1.5
 - @0x/connect@5.0.10
 - @0x/contract-wrappers@9.1.4
 - @0x/dev-tools-pages@0.0.27
 - @0x/dev-utils@2.2.3
 - @0x/fill-scenarios@3.0.10
 - @0x/instant@1.0.24
 - @0x/metacoin@0.0.51
 - @0x/migrations@4.1.6
 - @0x/order-utils@8.1.1
 - @0x/order-watcher@4.0.11
 - @0x/pipeline@1.0.21
 - @0x/react-docs@2.0.12
 - @0x/react-shared@2.0.12
 - @0x/sol-compiler@3.1.8
 - @0x/sol-coverage@3.0.5
 - @0x/sol-doc@2.0.12
 - @0x/sol-profiler@3.1.7
 - @0x/sol-trace@2.0.13
 - @0x/sol-tracing-utils@6.0.12
 - @0x/subproviders@4.1.0
 - @0x/testnet-faucets@1.0.80
 - @0x/website@0.0.83
 - @0x/contracts-asset-proxy@2.1.5
 - @0x/contracts-coordinator@2.0.4
 - @0x/contracts-erc1155@1.1.6
 - @0x/contracts-erc20@2.2.5
 - @0x/contracts-erc721@2.1.6
 - @0x/contracts-exchange@2.1.5
 - @0x/contracts-exchange-forwarder@3.0.3
 - @0x/contracts-exchange-libs@2.1.6
 - @0x/contracts-extensions@3.1.5
 - @0x/contracts-multisig@3.1.5
 - @0x/contracts-test-utils@3.1.7
 - @0x/contracts-utils@3.1.6

.circleci/config.yml

@@ -11,12 +11,17 @@ jobs:
         steps:
             - checkout
             - run: echo 'export PATH=$HOME/CIRCLE_PROJECT_REPONAME/node_modules/.bin:$PATH' >> $BASH_ENV
+            - run:
+                  # HACK(albrow): Without this, yarn commands will sometimes
+                  # fail with a "permission denied" error.
+                  name: Set npm path
+                  command: npm set prefix=/home/circleci/npm && echo 'export PATH=$HOME/circleci/npm/bin:$PATH' >> /home/circleci/.bashrc
             - run:
                   name: install-yarn
-                  command: sudo npm install --global yarn@1.9.4
+                  command: npm install --global yarn@1.9.4
             - run:
                   name: yarn
-                  command: yarn --frozen-lockfile --ignore-engines install
+                  command: yarn --frozen-lockfile --ignore-engines install || yarn --frozen-lockfile --ignore-engines install
             - setup_remote_docker
             - run: yarn build:ci:no_website
             - run: yarn build:ts
@@ -47,10 +52,12 @@ jobs:
             - run: yarn wsrun test:circleci @0x/contracts-exchange-libs
             - run: yarn wsrun test:circleci @0x/contracts-erc20
             - run: yarn wsrun test:circleci @0x/contracts-erc721
+            - run: yarn wsrun test:circleci @0x/contracts-erc1155
             - run: yarn wsrun test:circleci @0x/contracts-extensions
             - run: yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: yarn wsrun test:circleci @0x/contracts-exchange
             - run: yarn wsrun test:circleci @0x/contracts-exchange-forwarder
+            - run: yarn wsrun test:circleci @0x/contracts-coordinator
     test-contracts-geth:
         docker:
             - image: circleci/node:9-browsers
@@ -67,10 +74,12 @@ jobs:
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-exchange-libs
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-erc20
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-erc721
+            - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-erc1155
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-extensions
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-exchange
             - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-exchange-forwarder
+            - run: TEST_PROVIDER=geth yarn wsrun test:circleci @0x/contracts-coordinator
     test-publish:
         resource_class: medium+
         docker:
@@ -115,6 +124,8 @@ jobs:
                       - repo-{{ .Environment.CIRCLE_SHA1 }}
             - run: yarn wsrun test:circleci @0x/contracts-test-utils
             - run: yarn wsrun test:circleci @0x/abi-gen
+            - run: yarn wsrun test:circleci @0x/asset-buyer
+            - run: yarn wsrun test:circleci @0x/contract-artifacts
             - run: yarn wsrun test:circleci @0x/assert
             - run: yarn wsrun test:circleci @0x/base-contract
             - run: yarn wsrun test:circleci @0x/connect
@@ -139,6 +150,10 @@ jobs:
                   key: coverage-assert-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
                       - ~/repo/packages/assert/coverage/lcov.info
+            - save_cache:
+                  key: coverage-asset-buyer-{{ .Environment.CIRCLE_SHA1 }}
+                  paths:
+                      - ~/repo/packages/asset-buyer/coverage/lcov.info
             - save_cache:
                   key: coverage-base-contract-{{ .Environment.CIRCLE_SHA1 }}
                   paths:
@@ -197,8 +212,11 @@ jobs:
             - image: circleci/python
             - image: 0xorg/ganache-cli:2.2.2
             - image: 0xorg/launch-kit-ci
-              command: |
-                  yarn start:ts -p 3000:3000
+              environment:
+                  RPC_URL: http://localhost:8545
+                  NETWORK_ID: 50
+                  WHITELIST_ALL_TOKENS: True
+              command: bash -c "until curl -sfd'{\"method\":\"net_listening\"}' http://localhost:8545 | grep true; do continue; done; forever ts/lib/index.js"
         steps:
             - checkout
             - run: sudo chown -R circleci:circleci /usr/local/bin
@@ -314,6 +332,9 @@ jobs:
             - restore_cache:
                   keys:
                       - coverage-assert-{{ .Environment.CIRCLE_SHA1 }}
+            - restore_cache:
+                  keys:
+                      - coverage-asset-buyer-{{ .Environment.CIRCLE_SHA1 }}
             - restore_cache:
                   keys:
                       - coverage-base-contract-{{ .Environment.CIRCLE_SHA1 }}
@@ -386,9 +407,11 @@ workflows:
             - test-contracts-ganache:
                   requires:
                       - build
-            - test-contracts-geth:
-                  requires:
-                      - build
+            # TODO(albrow): Tests always fail on Geth right now because our fork
+            # is outdated. Uncomment once we have updated our Geth fork.
+            # - test-contracts-geth:
+            #       requires:
+            #           - build
             - test-pipeline:
                   requires:
                       - build

.github/autolabeler.yml

@@ -2,6 +2,7 @@ python: ['python-packages']
 contracts: ['contracts']
 sol-doc: ['packages/sol-doc']
 sol-resolver: ['packages/sol-resolver']
+contracts-gen: ['packages/contracts-gen']
 sra-spec: ['packages/sra-spec']
 subproviders: ['packages/subproviders']
 contract-addresses: ['packages/contract-addresses']

.gitignore

@@ -83,6 +83,7 @@ packages/react-docs/example/public/bundle*
 packages/testnet-faucets/server/
 
 # generated contract artifacts/
+contracts/coordinator/generated-artifacts/
 contracts/exchange/generated-artifacts/
 contracts/asset-proxy/generated-artifacts/
 contracts/multisig/generated-artifacts/
@@ -90,6 +91,7 @@ contracts/utils/generated-artifacts/
 contracts/exchange-libs/generated-artifacts/
 contracts/erc20/generated-artifacts/
 contracts/erc721/generated-artifacts/
+contracts/erc1155/generated-artifacts/
 contracts/extensions/generated-artifacts/
 contracts/exchange-forwarder/generated-artifacts/
 packages/sol-tracing-utils/test/fixtures/artifacts/
@@ -97,6 +99,7 @@ packages/metacoin/artifacts/
 
 # generated contract wrappers
 packages/abi-gen-wrappers/wrappers
+contracts/coordinator/generated-wrappers/
 contracts/exchange/generated-wrappers/
 contracts/asset-proxy/generated-wrappers/
 contracts/multisig/generated-wrappers/
@@ -104,6 +107,7 @@ contracts/utils/generated-wrappers/
 contracts/exchange-libs/generated-wrappers/
 contracts/erc20/generated-wrappers/
 contracts/erc721/generated-wrappers/
+contracts/erc1155/generated-wrappers/
 contracts/extensions/generated-wrappers/
 contracts/exchange-forwarder/generated-wrappers/
 packages/metacoin/src/contract_wrappers

.prettierignore

@@ -1,5 +1,7 @@
 lib
 .nyc_output
+/contracts/coordinator/generated-wrappers
+/contracts/coordinator/generated-artifacts
 /contracts/exchange/generated-wrappers
 /contracts/exchange/generated-artifacts
 /contracts/asset-proxy/generated-wrappers
@@ -14,6 +16,8 @@ lib
 /contracts/erc20/generated-artifacts
 /contracts/erc721/generated-wrappers
 /contracts/erc721/generated-artifacts
+/contracts/erc1155/generated-wrappers
+/contracts/erc1155/generated-artifacts
 /contracts/extensions/generated-wrappers
 /contracts/extensions/generated-artifacts
 /contracts/exchange-forwarder/generated-wrappers

CODEOWNERS

@@ -33,6 +33,8 @@ packages/subproviders/ @fabioberger @dekz
 packages/verdaccio/ @albrow
 packages/web3-wrapper/ @LogvinovLeon @fabioberger
 python-packages/ @feuGeneA
+packages/utils/ @hysz
 
 # Protocol/smart contracts
 contracts/core/test/ @albrow
+contracts/ @abandeali1 @hysz

README.md

@@ -34,18 +34,22 @@ Visit our [developer portal](https://0xproject.com/docs/order-utils) for a compr
 
 ### Solidity Packages
 
+These packages are all under development. See [/contracts/README.md](/contracts/README.md) for a list of deployed packages.
+
 | Package                                                             | Version                                                                                                                                     | Description                                                                                                                                                                                                                                           |
 | ------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy)               | [![npm](https://img.shields.io/npm/v/@0x/contracts-asset-proxy.svg)](https://www.npmjs.com/package/@0x/contracts-asset-proxy)               | [`AssetProxy`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxy) contracts used within the protocol                                                                                               |
 | [`@0x/contracts-erc20`](/contracts/erc20)                           | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc20.svg)](https://www.npmjs.com/package/@0x/contracts-erc20)                           | Implementations of various ERC20 tokens                                                                                                                                                                                                               |
 | [`@0x/contracts-erc721`](/contracts/erc721)                         | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc721.svg)](https://www.npmjs.com/package/@0x/contracts-erc721)                         | Implementations of various ERC721 tokens                                                                                                                                                                                                              |
+| [`@0x/contracts-erc1155`](/contracts/erc1155)                       | [![npm](https://img.shields.io/npm/v/@0x/contracts-erc1155.svg)](https://www.npmjs.com/package/@0x/contracts-erc1155)                       | Implementations of various ERC1155 tokens                                                                                                                                                                                                             |
 | [`@0x/contracts-exchange`](/contracts/exchange)                     | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange.svg)](https://www.npmjs.com/package/@0x/contracts-exchange)                     | The [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract used for settling trades within the protocol                                                                            |
 | [`@0x/contracts-exchange-forwarder`](/contracts/exchange-forwarder) | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-forwarder.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder) | A [`Forwarder`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract used to simplify UX for interacting with the protocol                                                                      |
-| [`@0x/contracts-exchange-libs`](/contracts/exchange-libs)           | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-libs.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-libs)           | Protocol specific Llbraries used within the [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract                                                                                 |
+| [`@0x/contracts-exchange-libs`](/contracts/exchange-libs)           | [![npm](https://img.shields.io/npm/v/@0x/contracts-exchange-libs.svg)](https://www.npmjs.com/package/@0x/contracts-exchange-libs)           | Protocol specific libraries used within the [`Exchange`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#exchange) contract                                                                                 |
 | [`@0x/contracts-extensions`](/contracts/extensions)                 | [![npm](https://img.shields.io/npm/v/@0x/contracts-extensions.svg)](https://www.npmjs.com/package/@0x/contracts-extensions)                 | Contracts that interact with and extend the functionality of the core protocol                                                                                                                                                                        |
 | [`@0x/contracts-multisig`](/contracts/multisig)                     | [![npm](https://img.shields.io/npm/v/@0x/contracts-multisig.svg)](https://www.npmjs.com/package/@0x/contracts-multisig)                     | Various implementations of multisignature wallets, including the [`AssetProxyOwner`](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/v2-specification.md#assetproxyowner) contract that has permissions to upgrade the protocol |
 | [`@0x/contracts-test-utils`](/contracts/test-utils)                 | [![npm](https://img.shields.io/npm/v/@0x/contracts-test-utils.svg)](https://www.npmjs.com/package/@0x/contracts-test-utils)                 | Typescript/Javascript shared utilities used for testing contracts                                                                                                                                                                                     |
 | [`@0x/contracts-utils`](/contracts/utils)                           | [![npm](https://img.shields.io/npm/v/@0x/contracts-utils.svg)](https://www.npmjs.com/package/@0x/contracts-utils)                           | Generic libraries and utilities used throughout all of the contracts                                                                                                                                                                                  |
+| [`@0x/contracts-coordinator`](/contracts/coordinator)               | [![npm](https://img.shields.io/npm/v/@0x/contracts-coordinator.svg)](https://www.npmjs.com/package/@0x/contracts-coordinator)               | A contract that allows users to execute 0x transactions with permission from a Coordinator                                                                                                                                                            |
 
 ### Typescript/Javascript Packages
 

contracts/README.md

@@ -0,0 +1,12 @@
+#### Deployed Contract Packages
+
+| Contract        | Package                                                             | Version                                                                          | Git Tag                                                                                                                                |
+| --------------- | ------------------------------------------------------------------- | -------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
+| AssetProxyOwner | [`@0x/contracts-multisig`](/contracts/multisig)                     | [v1.0.2](https://www.npmjs.com/package/@0x/contracts-multisig/v/1.0.2)           | [@0x/contracts-multisig@1.0.2](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-multisig@1.0.2)                     |
+| ERC20Proxy      | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy)               | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1)        | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1)               |
+| ERC721Proxy     | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy)               | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1)        | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1)               |
+| Exchange        | [`@0x/contracts-exchange`](/contracts/exchange)                     | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-exchange/v/1.0.1)           | [@0x/contracts-exchange@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-exchange@1.0.1)                     |
+| DutchAuction    | [`@0x/contracts-extensions`](/contracts/extensions)                 | [v1.0.2](https://www.npmjs.com/package/@0x/contracts-extensions/v/1.0.2)         | [@0x/contracts-extensions@1.0.2](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-extensions@1.0.2)                 |
+| Forwarder       | [`@0x/contracts-exchange-forwarder`](/contracts/exchange-forwarder) | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-exchange-forwarder/v/1.0.1) | [@0x/contracts-exchange-forwarder@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-exchange-forwarder@1.0.1) |
+| MultiAssetProxy | [`@0x/contracts-asset-proxy`](/contracts/asset-proxy)               | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-asset-proxy/v/1.0.1)        | [@0x/contracts-asset-proxy@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-asset-proxy@1.0.1)               |
+| ZRXToken        | [`@0x/contracts-erc20`](/contracts/erc20)                           | [v1.0.1](https://www.npmjs.com/package/@0x/contracts-erc20/v/1.0.1)              | [@0x/contracts-erc20@1.0.1](https://github.com/0xProject/0x-monorepo/releases/tag/@0x/contracts-erc20@1.0.1)                           |

contracts/asset-proxy/CHANGELOG.json

@@ -1,4 +1,154 @@
 [
+    {
+        "timestamp": 1558712885,
+        "version": "2.1.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557961111,
+        "version": "2.1.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557799313,
+        "version": "2.1.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "2.1.2",
+        "changes": [
+            {
+                "note": "Update tests to use contract-built-in `awaitTransactionSuccessAsync`",
+                "pr": 1797
+            }
+        ],
+        "timestamp": 1557507213
+    },
+    {
+        "version": "2.1.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1554997931
+    },
+    {
+        "version": "2.1.0",
+        "changes": [
+            {
+                "note": "Run Web3ProviderEngine without excess block polling",
+                "pr": 1695
+            }
+        ],
+        "timestamp": 1553183790
+    },
+    {
+        "version": "2.0.0",
+        "changes": [
+            {
+                "note": "Do not reexport external dependencies",
+                "pr": 1682
+            },
+            {
+                "note": "Add ERC1155Proxy",
+                "pr": 1661
+            },
+            {
+                "note": "Bumped solidity version to ^0.5.5",
+                "pr": 1701
+            },
+            {
+                "note": "Integration testing for ERC1155Proxy",
+                "pr": 1673
+            }
+        ],
+        "timestamp": 1553091633
+    },
+    {
+        "timestamp": 1551479279,
+        "version": "1.0.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551299797,
+        "version": "1.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551220833,
+        "version": "1.0.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1551130135,
+        "version": "1.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1549733923,
+        "version": "1.0.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1549547375
+    },
+    {
+        "version": "1.0.3",
+        "changes": [
+            {
+                "note": "Fake publish to enable pinning"
+            }
+        ],
+        "timestamp": 1549504360
+    },
+    {
+        "timestamp": 1549452781,
+        "version": "1.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1549373905,
         "version": "1.0.1",

contracts/asset-proxy/CHANGELOG.md

@@ -5,6 +5,69 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.1.5 - _May 24, 2019_
+
+    * Dependencies updated
+
+## v2.1.4 - _May 15, 2019_
+
+    * Dependencies updated
+
+## v2.1.3 - _May 14, 2019_
+
+    * Dependencies updated
+
+## v2.1.2 - _May 10, 2019_
+
+    * Update tests to use contract-built-in `awaitTransactionSuccessAsync` (#1797)
+
+## v2.1.1 - _April 11, 2019_
+
+    * Dependencies updated
+
+## v2.1.0 - _March 21, 2019_
+
+    * Run Web3ProviderEngine without excess block polling (#1695)
+
+## v2.0.0 - _March 20, 2019_
+
+    * Do not reexport external dependencies (#1682)
+    * Add ERC1155Proxy (#1661)
+    * Bumped solidity version to ^0.5.5 (#1701)
+    * Integration testing for ERC1155Proxy (#1673)
+
+## v1.0.9 - _March 1, 2019_
+
+    * Dependencies updated
+
+## v1.0.8 - _February 27, 2019_
+
+    * Dependencies updated
+
+## v1.0.7 - _February 26, 2019_
+
+    * Dependencies updated
+
+## v1.0.6 - _February 25, 2019_
+
+    * Dependencies updated
+
+## v1.0.5 - _February 9, 2019_
+
+    * Dependencies updated
+
+## v1.0.4 - _February 7, 2019_
+
+    * Dependencies updated
+
+## v1.0.3 - _February 7, 2019_
+
+    * Fake publish to enable pinning
+
+## v1.0.2 - _February 6, 2019_
+
+    * Dependencies updated
+
 ## v1.0.1 - _February 5, 2019_
 
     * Dependencies updated

contracts/asset-proxy/compiler.json

@@ -1,11 +1,14 @@
 {
     "artifactsDir": "./generated-artifacts",
     "contractsDir": "./contracts",
-    "useDockerisedSolc": true,
+    "useDockerisedSolc": false,
+    "isOfflineMode": false,
     "compilerSettings": {
+        "evmVersion": "constantinople",
         "optimizer": {
             "enabled": true,
-            "runs": 1000000
+            "runs": 1000000,
+            "details": { "yul": true, "deduplicate": true, "cse": true, "constantOptimizer": true }
         },
         "outputSelection": {
             "*": {
@@ -20,12 +23,14 @@
         }
     },
     "contracts": [
-        "IAssetData",
-        "IAssetProxy",
-        "IAuthorizable",
-        "ERC20Proxy",
-        "ERC721Proxy",
-        "MixinAuthorizable",
-        "MultiAssetProxy"
+        "src/ERC1155Proxy.sol",
+        "src/ERC20Proxy.sol",
+        "src/ERC721Proxy.sol",
+        "src/MixinAuthorizable.sol",
+        "src/MultiAssetProxy.sol",
+        "src/interfaces/IAssetData.sol",
+        "src/interfaces/IAssetProxy.sol",
+        "src/interfaces/IAuthorizable.sol",
+        "src/libs/LibAssetData.sol"
     ]
 }

contracts/asset-proxy/contracts/src/ERC1155Proxy.sol

@@ -0,0 +1,267 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./MixinAuthorizable.sol";
+
+
+contract ERC1155Proxy is
+    MixinAuthorizable
+{
+
+    // Id of this proxy.
+    bytes4 constant internal PROXY_ID = bytes4(keccak256("ERC1155Assets(address,uint256[],uint256[],bytes)"));
+
+    function () 
+        external
+    {
+        // Input calldata to this function is encoded as follows:
+        //                      -- TABLE #1 --
+        // | 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         | (see below) | assetData Contents              |
+        //
+        //
+        // Asset data is encoded as follows:
+        //                      -- TABLE #2 --
+        // | Area     | Offset      | Length  | Contents                            |
+        // |----------|-------------|---------|-------------------------------------|
+        // | Header   | 0           | 4       | assetProxyId                        |
+        // | Params   |             | 4 * 32  | function parameters:                |
+        // |          | 4           |         |   1. address of ERC1155 contract    |
+        // |          | 36          |         |   2. offset to ids (*)              |
+        // |          | 68          |         |   3. offset to values (*)           |
+        // |          | 100         |         |   4. offset to data (*)             |
+        // | Data     |             |         | ids:                                |
+        // |          | 132         | 32      |   1. ids Length                     |
+        // |          | 164         | a       |   2. ids Contents                   | 
+        // |          |             |         | values:                             |
+        // |          | 164 + a     | 32      |   1. values Length                  |
+        // |          | 196 + a     | b       |   2. values Contents                |
+        // |          |             |         | data                                |
+        // |          | 196 + a + b | 32      |   1. data Length                    |
+        // |          | 228 + a + b | c       |   2. data Contents                  |
+        //
+        //
+        // Calldata for target ERC155 asset is encoded for safeBatchTransferFrom:
+        //                      -- TABLE #3 --
+        // | Area     | Offset (**) | Length  | Contents                            |
+        // |----------|-------------|---------|-------------------------------------|
+        // | Header   | 0           | 4       | safeBatchTransferFrom selector      |
+        // | Params   |             | 5 * 32  | function parameters:                |
+        // |          | 4           |         |   1. from address                   |
+        // |          | 36          |         |   2. to address                     |
+        // |          | 68          |         |   3. offset to ids (*)              |
+        // |          | 100         |         |   4. offset to values (*)           |
+        // |          | 132         |         |   5. offset to data (*)             |
+        // | Data     |             |         | ids:                                |
+        // |          | 164         | 32      |   1. ids Length                     |
+        // |          | 196         | a       |   2. ids Contents                   | 
+        // |          |             |         | values:                             |
+        // |          | 196 + a     | 32      |   1. values Length                  |
+        // |          | 228 + a     | b       |   2. values Contents                |
+        // |          |             |         | data                                |
+        // |          | 228 + a + b | 32      |   1. data Length                    |
+        // |          | 260 + a + b | c       |   2. data Contents                  |
+        //
+        //
+        // (*): offset is computed from start of function parameters, so offset
+        //      by an additional 4 bytes in the calldata.
+        // 
+        // (**): the `Offset` column is computed assuming no calldata compression;
+        //       offsets in the Data Area are dynamic and should be evaluated in
+        //       real-time.
+        //
+        // WARNING: The ABIv2 specification allows additional padding between
+        //          the Params and Data section. This will result in a larger
+        //          offset to assetData.
+        //
+        // Note: Table #1 and Table #2 exists in Calldata. We construct Table #3 in memory. 
+        //
+        //
+        assembly {
+            // The first 4 bytes of calldata holds the function selector
+            let selector := and(calldataload(0), 0xffffffff00000000000000000000000000000000000000000000000000000000)
+
+            // `transferFrom` will be called with the following parameters:
+            // assetData Encoded byte array.
+            // from Address to transfer asset from.
+            // to Address to transfer asset to.
+            // amount Amount of asset to transfer.
+            // bytes4(keccak256("transferFrom(bytes,address,address,uint256)")) = 0xa85e59e4
+            if eq(selector, 0xa85e59e400000000000000000000000000000000000000000000000000000000) {
+                
+                // To lookup a value in a mapping, we load from the storage location keccak256(k, p),
+                // where k is the key left padded to 32 bytes and p is the storage slot
+                mstore(0, caller)
+                mstore(32, authorized_slot)
+
+                 // Revert if authorized[msg.sender] == false
+                if iszero(sload(keccak256(0, 64))) {
+                    // Revert with `Error("SENDER_NOT_AUTHORIZED")`
+                    mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                    mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                    mstore(64, 0x0000001553454e4445525f4e4f545f415554484f52495a454400000000000000)
+                    mstore(96, 0)
+                    revert(0, 100)
+                }
+
+                // Construct Table #3 in memory, starting at memory offset 0.
+                // The algorithm below maps asset data from Table #1 and Table #2 to Table #3, while
+                // scaling the `values` (Table #2) by `amount` (Table #1). Once Table #3 has
+                // been constructed in memory, the destination erc1155 contract is called using this 
+                // as its calldata. This process is divided into four steps, below.
+
+                ////////// STEP 1/4 //////////
+                // Map relevant fields from assetData (Table #2) into memory (Table #3)
+                // The Contents column of Table #2 is the same as Table #3,
+                // beginning from parameter 3 - `offset to ids (*)`
+                // The offsets in these rows are offset by 32 bytes in Table #3.
+                // Strategy:
+                // 1. Copy the assetData into memory at offset 32
+                // 2. Increment by 32 the offsets to `ids`, `values`, and `data`
+
+                // Load offset to `assetData`
+                let assetDataOffset := calldataload(4)
+
+                // Load length in bytes of `assetData`, computed by:
+                // 4 (function selector)
+                // + assetDataOffset
+                let assetDataLength := calldataload(add(4, assetDataOffset))
+
+                // This corresponds to the beginning of the Data Area for Table #3.
+                // Computed by:
+                // 4 (function selector)
+                // + assetDataOffset
+                // + 32 (length of assetData)
+                calldatacopy(
+                    32,                         // aligned such that "offset to ids" is at the correct location for Table #3
+                    add(36, assetDataOffset),   // beginning of asset data contents
+                    assetDataLength             // length of asset data
+                )
+
+                // Increment by 32 the offsets to `ids`, `values`, and `data`
+                mstore(68, add(mload(68), 32))
+                mstore(100, add(mload(100), 32))
+                mstore(132, add(mload(132), 32))
+
+                // Record the address of the destination erc1155 asset for later.
+                let assetAddress := and(
+                    mload(36),
+                    0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff
+                )
+
+                ////////// STEP 2/4 //////////
+                let amount := calldataload(100)
+                let valuesOffset := add(mload(100), 4) // add 4 for calldata offset
+                let valuesLengthInBytes := mul(
+                    mload(valuesOffset),
+                    32
+                )
+                let valuesBegin := add(valuesOffset, 32)
+                let valuesEnd := add(valuesBegin, valuesLengthInBytes)
+                for { let tokenValueOffset := valuesBegin }
+                    lt(tokenValueOffset, valuesEnd)
+                    { tokenValueOffset := add(tokenValueOffset, 32) }
+                {
+                    // Load token value and generate scaled value
+                    let tokenValue := mload(tokenValueOffset)
+                    let scaledTokenValue := mul(tokenValue, amount)
+
+                    // Revert if `amount` != 0 and multiplication resulted in an overflow
+                    if iszero(or(
+                        iszero(amount),
+                        eq(div(scaledTokenValue, amount), tokenValue)
+                    )) {
+                        // Revert with `Error("UINT256_OVERFLOW")`
+                        mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                        mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                        mstore(64, 0x0000001055494e543235365f4f564552464c4f57000000000000000000000000)
+                        mstore(96, 0)
+                        revert(0, 100)
+                    }
+
+                    // There was no overflow, update `tokenValue` with its scaled counterpart
+                    mstore(tokenValueOffset, scaledTokenValue)
+                }
+
+                ////////// STEP 3/4 //////////
+                // Store the safeBatchTransferFrom function selector,
+                // and copy `from`/`to` fields from Table #1 to Table #3.
+
+                // The function selector is computed using:
+                // bytes4(keccak256("safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)"))
+                mstore(0, 0x2eb2c2d600000000000000000000000000000000000000000000000000000000)
+
+                // Copy `from` and `to` fields from Table #1 to Table #3
+                calldatacopy(
+                    4,          // aligned such that `from` and `to` are at the correct location for Table #3
+                    36,         // beginning of `from` field from Table #1
+                    64          // 32 bytes for `from` + 32 bytes for `to` field
+                )
+
+                ////////// STEP 4/4 //////////
+                // Call into the destination erc1155 contract using as calldata Table #3 (constructed in-memory above)
+                let success := call(
+                    gas,                                    // forward all gas
+                    assetAddress,                           // call address of erc1155 asset
+                    0,                                      // don't send any ETH
+                    0,                                      // pointer to start of input
+                    add(assetDataLength, 32),               // length of input (Table #3) is 32 bytes longer than `assetData` (Table #2)
+                    0,                                      // write output over memory that won't be reused
+                    0                                       // don't copy output to memory
+                )
+
+                // Revert with reason given by AssetProxy if `transferFrom` call failed
+                if iszero(success) {
+                    returndatacopy(
+                        0,                // copy to memory at 0
+                        0,                // copy from return data at 0
+                        returndatasize()  // copy all return data
+                    )
+                    revert(0, returndatasize())
+                }
+                
+                // Return if call was successful
+                return(0, 0)
+            }
+
+            // Revert if undefined function is called
+            revert(0, 0)
+        }
+    }
+
+    /// @dev Gets the proxy id associated with the proxy address.
+    /// @return Proxy id.
+    function getProxyId()
+        external
+        pure
+        returns (bytes4)
+    {
+        return PROXY_ID;
+    }
+}

contracts/asset-proxy/contracts/src/ERC20Proxy.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.24;
+pragma solidity ^0.5.5;
 
 import "./MixinAuthorizable.sol";
 

contracts/asset-proxy/contracts/src/ERC721Proxy.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.24;
+pragma solidity ^0.5.5;
 
 import "./MixinAuthorizable.sol";
 

contracts/asset-proxy/contracts/src/MixinAssetProxyDispatcher.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "@0x/contracts-utils/contracts/src/Ownable.sol";
 import "./mixins/MAssetProxyDispatcher.sol";
@@ -28,7 +28,7 @@ contract MixinAssetProxyDispatcher is
     MAssetProxyDispatcher
 {
     // Mapping from Asset Proxy Id's to their respective Asset Proxy
-    mapping (bytes4 => IAssetProxy) public assetProxies;
+    mapping (bytes4 => address) public assetProxies;
 
     /// @dev Registers an asset proxy to its asset proxy id.
     ///      Once an asset proxy is registered, it cannot be unregistered.
@@ -37,10 +37,8 @@ contract MixinAssetProxyDispatcher is
         external
         onlyOwner
     {
-        IAssetProxy assetProxyContract = IAssetProxy(assetProxy);
-
         // Ensure that no asset proxy exists with current id.
-        bytes4 assetProxyId = assetProxyContract.getProxyId();
+        bytes4 assetProxyId = IAssetProxy(assetProxy).getProxyId();
         address currentAssetProxy = assetProxies[assetProxyId];
         require(
             currentAssetProxy == address(0),
@@ -48,7 +46,7 @@ contract MixinAssetProxyDispatcher is
         );
 
         // Add asset proxy and log registration.
-        assetProxies[assetProxyId] = assetProxyContract;
+        assetProxies[assetProxyId] = assetProxy;
         emit AssetProxyRegistered(
             assetProxyId,
             assetProxy

contracts/asset-proxy/contracts/src/MixinAuthorizable.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "@0x/contracts-utils/contracts/src/Ownable.sol";
 import "./mixins/MAuthorizable.sol";

contracts/asset-proxy/contracts/src/MultiAssetProxy.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.24;
+pragma solidity ^0.5.5;
 
 import "./MixinAssetProxyDispatcher.sol";
 import "./MixinAuthorizable.sol";

contracts/asset-proxy/contracts/src/interfaces/IAssetData.sol

@@ -17,7 +17,7 @@
 */
 
 // solhint-disable
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 pragma experimental ABIEncoderV2;
 
 
@@ -36,8 +36,8 @@ interface IAssetData {
         external;
 
     function MultiAsset(
-        uint256[] amounts,
-        bytes[] nestedAssetData
+        uint256[] calldata amounts,
+        bytes[] calldata nestedAssetData
     )
         external;
     

contracts/asset-proxy/contracts/src/interfaces/IAssetProxy.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "./IAuthorizable.sol";
 
@@ -30,7 +30,7 @@ contract IAssetProxy is
     /// @param to Address to transfer asset to.
     /// @param amount Amount of asset to transfer.
     function transferFrom(
-        bytes assetData,
+        bytes calldata assetData,
         address from,
         address to,
         uint256 amount

contracts/asset-proxy/contracts/src/interfaces/IAssetProxyDispatcher.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 
 contract IAssetProxyDispatcher {

contracts/asset-proxy/contracts/src/interfaces/IAuthorizable.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "@0x/contracts-utils/contracts/src/interfaces/IOwnable.sol";
 

contracts/asset-proxy/contracts/src/libs/LibAssetData.sol

@@ -0,0 +1,420 @@
+/*
+
+  Copyright 2019 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-utils/contracts/src/LibBytes.sol";
+import "@0x/contracts-erc1155/contracts/src/interfaces/IERC1155.sol";
+import "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol";
+import "@0x/contracts-erc721/contracts/src/interfaces/IERC721Token.sol";
+
+
+library LibAssetData {
+    bytes4 constant public ERC20_PROXY_ID = bytes4(keccak256("ERC20Token(address)"));
+    bytes4 constant public ERC721_PROXY_ID = bytes4(keccak256("ERC721Token(address,uint256)"));
+    bytes4 constant public ERC1155_PROXY_ID = bytes4(keccak256("ERC1155Assets(address,uint256[],uint256[],bytes)"));
+    bytes4 constant public MULTI_ASSET_PROXY_ID = bytes4(keccak256("MultiAsset(uint256[],bytes[])"));
+
+    /// @dev Returns the owner's balance of the token(s) specified in
+    ///     assetData.  When the asset data contains multiple tokens (eg in
+    ///     ERC1155 or Multi-Asset), the return value indicates how many
+    ///     complete "baskets" of those tokens are owned by owner.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param assetData Description of tokens, per the AssetProxy contract
+    ///     specification.
+    /// @return Number of tokens (or token baskets) held by owner.
+    function getBalance(address owner, bytes memory assetData)
+        public
+        view
+        returns (uint256 balance)
+    {
+        bytes4 proxyId = LibBytes.readBytes4(assetData, 0);
+        if (proxyId == ERC20_PROXY_ID) {
+            address tokenAddress = LibBytes.readAddress(assetData, 16);
+            return IERC20Token(tokenAddress).balanceOf(owner);
+        } else if (proxyId == ERC721_PROXY_ID) {
+            (, address tokenAddress, uint256 tokenId) = decodeERC721AssetData(assetData);
+            return getERC721TokenOwner(tokenAddress, tokenId) == owner ? 1 : 0;
+        } else if (proxyId == ERC1155_PROXY_ID) {
+            uint256 lowestTokenBalance = 0;
+            (
+                ,
+                address tokenAddress,
+                uint256[] memory tokenIds,
+                uint256[] memory tokenValues,
+            ) = decodeERC1155AssetData(assetData);
+            for (uint256 i = 0; i < tokenIds.length; i++) {
+                uint256 tokenBalance = IERC1155(tokenAddress).balanceOf(owner, tokenIds[i]) / tokenValues[i];
+                if (tokenBalance < lowestTokenBalance || lowestTokenBalance == 0) {
+                    lowestTokenBalance = tokenBalance;
+                }
+            }
+            return lowestTokenBalance;
+        } else if (proxyId == MULTI_ASSET_PROXY_ID) {
+            uint256 lowestAssetBalance = 0;
+            (, uint256[] memory assetAmounts, bytes[] memory nestedAssetData) = decodeMultiAssetData(assetData);
+            for (uint256 i = 0; i < nestedAssetData.length; i++) {
+                uint256 assetBalance = getBalance(owner, nestedAssetData[i]) / assetAmounts[i];
+                if (assetBalance < lowestAssetBalance || lowestAssetBalance == 0) {
+                    lowestAssetBalance = assetBalance;
+                }
+            }
+            return lowestAssetBalance;
+        } else {
+            revert("UNSUPPORTED_PROXY_IDENTIFIER");
+        }
+    }
+
+    /// @dev Calls getBalance() for each element of assetData.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param assetData Array of token descriptors, each encoded per the
+    ///     AssetProxy contract specification.
+    /// @return Array of token balances from getBalance(), with each element
+    ///     corresponding to the same-indexed element in the assetData input.
+    function getBatchBalances(address owner, bytes[] memory assetData)
+        public
+        view
+        returns (uint256[] memory balances)
+    {
+        balances = new uint256[](assetData.length);
+        for (uint256 i = 0; i < assetData.length; i++) {
+            balances[i] = getBalance(owner, assetData[i]);
+        }
+    }
+
+    /// @dev Returns the number of token(s) (described by assetData) that
+    ///     spender is authorized to spend.  When the asset data contains
+    ///     multiple tokens (eg for Multi-Asset), the return value indicates
+    ///     how many complete "baskets" of those tokens may be spent by spender.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param spender Address whose authority to spend is in question.
+    /// @param assetData Description of tokens, per the AssetProxy contract
+    ///     specification.
+    /// @return Number of tokens (or token baskets) that the spender is
+    ///     authorized to spend.
+    function getAllowance(address owner, address spender, bytes memory assetData)
+        public
+        view
+        returns (uint256 allowance)
+    {
+        bytes4 proxyId = LibBytes.readBytes4(assetData, 0);
+
+        if (proxyId == ERC20_PROXY_ID) {
+            address tokenAddress = LibBytes.readAddress(assetData, 16);
+            return IERC20Token(tokenAddress).allowance(owner, spender);
+        } else if (proxyId == ERC721_PROXY_ID) {
+            (, address tokenAddress, uint256 tokenId) = decodeERC721AssetData(assetData);
+            IERC721Token token = IERC721Token(tokenAddress);
+            if (spender == token.getApproved(tokenId) || token.isApprovedForAll(owner, spender)) {
+                return 1;
+            } else {
+                return 0;
+            }
+        } else if (proxyId == ERC1155_PROXY_ID) {
+            (, address tokenAddress, , , ) = decodeERC1155AssetData(assetData);
+            if (IERC1155(tokenAddress).isApprovedForAll(owner, spender)) {
+                return 1;
+            } else {
+                return 0;
+            }
+        } else if (proxyId == MULTI_ASSET_PROXY_ID) {
+            uint256 lowestAssetAllowance = 0;
+            // solhint-disable-next-line indent
+            (, uint256[] memory amounts, bytes[] memory nestedAssetData) = decodeMultiAssetData(assetData);
+            for (uint256 i = 0; i < nestedAssetData.length; i++) {
+                uint256 assetAllowance = getAllowance(owner, spender, nestedAssetData[i]) / amounts[i];
+                if (assetAllowance < lowestAssetAllowance || lowestAssetAllowance == 0) {
+                    lowestAssetAllowance = assetAllowance;
+                }
+            }
+            return lowestAssetAllowance;
+        } else {
+            revert("UNSUPPORTED_PROXY_IDENTIFIER");
+        }
+    }
+
+    /// @dev Calls getAllowance() for each element of assetData.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param spender Address whose authority to spend is in question.
+    /// @param assetData Description of tokens, per the AssetProxy contract
+    ///     specification.
+    /// @return An array of token allowances from getAllowance(), with each
+    ///     element corresponding to the same-indexed element in the assetData
+    ///     input.
+    function getBatchAllowances(address owner, address spender, bytes[] memory assetData)
+        public
+        view
+        returns (uint256[] memory allowances)
+    {
+        allowances = new uint256[](assetData.length);
+        for (uint256 i = 0; i < assetData.length; i++) {
+            allowances[i] = getAllowance(owner, spender, assetData[i]);
+        }
+    }
+
+    /// @dev Calls getBalance() and getAllowance() for assetData.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param spender Address whose authority to spend is in question.
+    /// @param assetData Description of tokens, per the AssetProxy contract
+    ///     specification.
+    /// @return Number of tokens (or token baskets) held by owner, and number
+    ///     of tokens (or token baskets) that the spender is authorized to
+    ///     spend.
+    function getBalanceAndAllowance(address owner, address spender, bytes memory assetData)
+        public
+        view
+        returns (uint256 balance, uint256 allowance)
+    {
+        balance = getBalance(owner, assetData);
+        allowance = getAllowance(owner, spender, assetData);
+    }
+
+    /// @dev Calls getBatchBalances() and getBatchAllowances() for each element
+    ///     of assetData.
+    /// @param owner Owner of the tokens specified by assetData.
+    /// @param spender Address whose authority to spend is in question.
+    /// @param assetData Description of tokens, per the AssetProxy contract
+    ///     specification.
+    /// @return An array of token balances from getBalance(), and an array of
+    ///     token allowances from getAllowance(), with each element
+    ///     corresponding to the same-indexed element in the assetData input.
+    function getBatchBalancesAndAllowances(address owner, address spender, bytes[] memory assetData)
+        public
+        view
+        returns (uint256[] memory balances, uint256[] memory allowances)
+    {
+        balances = getBatchBalances(owner, assetData);
+        allowances = getBatchAllowances(owner, spender, assetData);
+    }
+
+    /// @dev Encode ERC-20 asset data into the format described in the
+    ///     AssetProxy contract specification.
+    /// @param tokenAddress The address of the ERC-20 contract hosting the
+    ///     token to be traded.
+    /// @return AssetProxy-compliant data describing the asset.
+    function encodeERC20AssetData(address tokenAddress)
+        public
+        pure
+        returns (bytes memory assetData)
+    {
+        return abi.encodeWithSelector(ERC20_PROXY_ID, tokenAddress);
+    }
+
+    /// @dev Decode ERC-20 asset data from the format described in the
+    ///     AssetProxy contract specification.
+    /// @param assetData AssetProxy-compliant asset data describing an ERC-20
+    ///     asset.
+    /// @return The ERC-20 AssetProxy identifier, and the address of the ERC-20
+    ///     contract hosting this asset.
+    function decodeERC20AssetData(bytes memory assetData)
+        public
+        pure
+        returns (
+            bytes4 proxyId,
+            address tokenAddress
+        )
+    {
+        proxyId = LibBytes.readBytes4(assetData, 0);
+
+        require(proxyId == ERC20_PROXY_ID, "WRONG_PROXY_ID");
+
+        tokenAddress = LibBytes.readAddress(assetData, 16);
+    }
+
+    /// @dev Encode ERC-721 asset data into the format described in the
+    ///     AssetProxy specification.
+    /// @param tokenAddress The address of the ERC-721 contract hosting the
+    ///     token to be traded.
+    /// @param tokenId The identifier of the specific token to be traded.
+    /// @return AssetProxy-compliant asset data describing the asset.
+    function encodeERC721AssetData(
+        address tokenAddress,
+        uint256 tokenId
+    )
+        public
+        pure
+        returns (bytes memory assetData)
+    {
+        return abi.encodeWithSelector(ERC721_PROXY_ID, tokenAddress, tokenId);
+    }
+
+    /// @dev Decode ERC-721 asset data from the format described in the
+    ///     AssetProxy contract specification.
+    /// @param assetData AssetProxy-compliant asset data describing an ERC-721
+    ///     asset.
+    /// @return The ERC-721 AssetProxy identifier, the address of the ERC-721
+    ///     contract hosting this asset, and the identifier of the specific
+    ///     token to be traded.
+    function decodeERC721AssetData(bytes memory assetData)
+        public
+        pure
+        returns (
+            bytes4 proxyId,
+            address tokenAddress,
+            uint256 tokenId
+        )
+    {
+        proxyId = LibBytes.readBytes4(assetData, 0);
+
+        require(proxyId == ERC721_PROXY_ID, "WRONG_PROXY_ID");
+
+        tokenAddress = LibBytes.readAddress(assetData, 16);
+        tokenId = LibBytes.readUint256(assetData, 36);
+    }
+
+    /// @dev Encode ERC-1155 asset data into the format described in the
+    ///     AssetProxy contract specification.
+    /// @param tokenAddress The address of the ERC-1155 contract hosting the
+    ///     token(s) to be traded.
+    /// @param tokenIds The identifiers of the specific tokens to be traded.
+    /// @param tokenValues The amounts of each token to be traded.
+    /// @param callbackData ...
+    /// @return AssetProxy-compliant asset data describing the set of assets.
+    function encodeERC1155AssetData(
+        address tokenAddress,
+        uint256[] memory tokenIds,
+        uint256[] memory tokenValues,
+        bytes memory callbackData
+    )
+        public
+        pure
+        returns (bytes memory assetData)
+    {
+        return abi.encodeWithSelector(ERC1155_PROXY_ID, tokenAddress, tokenIds, tokenValues, callbackData);
+    }
+
+    /// @dev Decode ERC-1155 asset data from the format described in the
+    ///     AssetProxy contract specification.
+    /// @param assetData AssetProxy-compliant asset data describing an ERC-1155
+    ///     set of assets.
+    /// @return The ERC-1155 AssetProxy identifier, the address of the ERC-1155
+    ///     contract hosting the assets, an array of the identifiers of the
+    ///     tokens to be traded, an array of token amounts to be traded, and
+    ///     callback data.  Each element of the arrays corresponds to the
+    ///     same-indexed element of the other array.  Return values specified as
+    ///     `memory` are returned as pointers to locations within the memory of
+    ///     the input parameter `assetData`.
+    function decodeERC1155AssetData(bytes memory assetData)
+        public
+        pure
+        returns (
+            bytes4 proxyId,
+            address tokenAddress,
+            uint256[] memory tokenIds,
+            uint256[] memory tokenValues,
+            bytes memory callbackData
+        )
+    {
+        proxyId = LibBytes.readBytes4(assetData, 0);
+
+        require(proxyId == ERC1155_PROXY_ID, "WRONG_PROXY_ID");
+
+        assembly {
+            // Skip selector and length to get to the first parameter:
+            assetData := add(assetData, 36)
+            // Read the value of the first parameter:
+            tokenAddress := mload(assetData)
+            // Point to the next parameter's data:
+            tokenIds := add(assetData, mload(add(assetData, 32)))
+            // Point to the next parameter's data:
+            tokenValues := add(assetData, mload(add(assetData, 64)))
+            // Point to the next parameter's data:
+            callbackData := add(assetData, mload(add(assetData, 96)))
+        }
+    }
+
+    /// @dev Encode data for multiple assets, per the AssetProxy contract
+    ///     specification.
+    /// @param amounts The amounts of each asset to be traded.
+    /// @param nestedAssetData AssetProxy-compliant data describing each asset
+    ///     to be traded.
+    /// @return AssetProxy-compliant data describing the set of assets.
+    function encodeMultiAssetData(uint256[] memory amounts, bytes[] memory nestedAssetData)
+        public
+        pure
+        returns (bytes memory assetData)
+    {
+        assetData = abi.encodeWithSelector(MULTI_ASSET_PROXY_ID, amounts, nestedAssetData);
+    }
+
+    /// @dev Decode multi-asset data from the format described in the
+    ///     AssetProxy contract specification.
+    /// @param assetData AssetProxy-compliant data describing a multi-asset
+    ///     basket.
+    /// @return The Multi-Asset AssetProxy identifier, an array of the amounts
+    ///     of the assets to be traded, and an array of the
+    ///     AssetProxy-compliant data describing each asset to be traded.  Each
+    ///     element of the arrays corresponds to the same-indexed element of
+    ///     the other array.
+    function decodeMultiAssetData(bytes memory assetData)
+        public
+        pure
+        returns (
+            bytes4 proxyId,
+            uint256[] memory amounts,
+            bytes[] memory nestedAssetData
+        )
+    {
+        proxyId = LibBytes.readBytes4(assetData, 0);
+
+        require(proxyId == MULTI_ASSET_PROXY_ID, "WRONG_PROXY_ID");
+
+        // solhint-disable-next-line indent
+        (amounts, nestedAssetData) = abi.decode(LibBytes.slice(assetData, 4, assetData.length), (uint256[], bytes[]));
+    }
+
+    /// @dev Calls `token.ownerOf(tokenId)`, but returns a null owner instead of reverting on an unowned token.
+    /// @param token Address of ERC721 token.
+    /// @param tokenId The identifier for the specific NFT.
+    /// @return Owner of tokenId or null address if unowned.
+    function getERC721TokenOwner(address token, uint256 tokenId)
+        public
+        view
+        returns (address owner)
+    {
+        assembly {
+            // load free memory pointer
+            let cdStart := mload(64)
+
+            // bytes4(keccak256(ownerOf(uint256))) = 0x6352211e
+            mstore(cdStart, 0x6352211e00000000000000000000000000000000000000000000000000000000)
+            mstore(add(cdStart, 4), tokenId)
+
+            // staticcall `ownerOf(tokenId)`
+            // `ownerOf` will revert if tokenId is not owned
+            let success := staticcall(
+                gas,      // forward all gas
+                token,    // call token contract
+                cdStart,  // start of calldata
+                36,       // length of input is 36 bytes
+                cdStart,  // write output over input
+                32        // size of output is 32 bytes
+            )
+
+            // Success implies that tokenId is owned
+            // Copy owner from return data if successful
+            if success {
+                owner := mload(cdStart)
+            }
+        }
+
+        // Owner initialized to address(0), no need to modify if call is unsuccessful
+        return owner;
+    }
+}

contracts/asset-proxy/contracts/src/mixins/MAssetProxyDispatcher.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "../interfaces/IAssetProxyDispatcher.sol";
 

contracts/asset-proxy/contracts/src/mixins/MAuthorizable.sol

@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity ^0.4.24;
+pragma solidity ^0.5.5;
 
 import "../interfaces/IAuthorizable.sol";
 

contracts/asset-proxy/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-asset-proxy",
-    "version": "1.0.1",
+    "version": "2.1.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -24,15 +24,18 @@
         "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
         "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
         "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "fix": "tslint --fix --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
         "coverage:report:text": "istanbul report text",
         "coverage:report:html": "istanbul report html && open coverage/index.html",
         "profiler:report:html": "istanbul report html && open coverage/index.html",
         "coverage:report:lcov": "istanbul report lcov",
         "test:circleci": "yarn test",
+        "contracts:gen": "contracts-gen",
         "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "generated-artifacts/@(ERC20Proxy|ERC721Proxy|IAssetData|IAssetProxy|IAuthorizable|MixinAuthorizable|MultiAssetProxy).json"
+        "abis": "./generated-artifacts/@(ERC1155Proxy|ERC20Proxy|ERC721Proxy|IAssetData|IAssetProxy|IAuthorizable|LibAssetData|MixinAuthorizable|MultiAssetProxy).json",
+        "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
     },
     "repository": {
         "type": "git",
@@ -44,10 +47,12 @@
     },
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
     "devDependencies": {
-        "@0x/abi-gen": "^2.0.0",
-        "@0x/dev-utils": "^2.0.0",
-        "@0x/sol-compiler": "^3.0.0",
-        "@0x/tslint-config": "^3.0.0",
+        "@0x/abi-gen": "^2.0.10",
+        "@0x/contracts-gen": "^1.0.9",
+        "@0x/contracts-test-utils": "^3.1.7",
+        "@0x/dev-utils": "^2.2.3",
+        "@0x/sol-compiler": "^3.1.8",
+        "@0x/tslint-config": "^3.0.1",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
         "chai": "^4.0.1",
@@ -63,18 +68,18 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^4.0.0",
-        "@0x/contracts-erc20": "^1.0.1",
-        "@0x/contracts-erc721": "^1.0.1",
-        "@0x/contracts-test-utils": "^3.0.0",
-        "@0x/contracts-utils": "^2.0.0",
-        "@0x/order-utils": "^4.0.0",
-        "@0x/types": "^2.0.0",
-        "@0x/typescript-typings": "^4.0.0",
-        "@0x/utils": "^4.0.1",
-        "@0x/web3-wrapper": "^4.0.0",
-        "ethereum-types": "^2.0.0",
-        "lodash": "^4.17.5"
+        "@0x/base-contract": "^5.1.0",
+        "@0x/contracts-erc1155": "^1.1.6",
+        "@0x/contracts-erc20": "^2.2.5",
+        "@0x/contracts-erc721": "^2.1.6",
+        "@0x/contracts-utils": "^3.1.6",
+        "@0x/order-utils": "^8.1.1",
+        "@0x/types": "^2.2.2",
+        "@0x/typescript-typings": "^4.2.2",
+        "@0x/utils": "^4.3.3",
+        "@0x/web3-wrapper": "^6.0.6",
+        "ethereum-types": "^2.1.2",
+        "lodash": "^4.17.11"
     },
     "publishConfig": {
         "access": "public"

contracts/asset-proxy/src/artifacts.ts

@@ -0,0 +1,27 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+import { ContractArtifact } from 'ethereum-types';
+
+import * as ERC1155Proxy from '../generated-artifacts/ERC1155Proxy.json';
+import * as ERC20Proxy from '../generated-artifacts/ERC20Proxy.json';
+import * as ERC721Proxy from '../generated-artifacts/ERC721Proxy.json';
+import * as IAssetData from '../generated-artifacts/IAssetData.json';
+import * as IAssetProxy from '../generated-artifacts/IAssetProxy.json';
+import * as IAuthorizable from '../generated-artifacts/IAuthorizable.json';
+import * as LibAssetData from '../generated-artifacts/LibAssetData.json';
+import * as MixinAuthorizable from '../generated-artifacts/MixinAuthorizable.json';
+import * as MultiAssetProxy from '../generated-artifacts/MultiAssetProxy.json';
+export const artifacts = {
+    LibAssetData: LibAssetData as ContractArtifact,
+    ERC1155Proxy: ERC1155Proxy as ContractArtifact,
+    ERC20Proxy: ERC20Proxy as ContractArtifact,
+    ERC721Proxy: ERC721Proxy as ContractArtifact,
+    MixinAuthorizable: MixinAuthorizable as ContractArtifact,
+    MultiAssetProxy: MultiAssetProxy as ContractArtifact,
+    IAssetData: IAssetData as ContractArtifact,
+    IAssetProxy: IAssetProxy as ContractArtifact,
+    IAuthorizable: IAuthorizable as ContractArtifact,
+};

contracts/asset-proxy/src/artifacts/index.ts

@@ -1,19 +0,0 @@
-import { ContractArtifact } from 'ethereum-types';
-
-import * as ERC20Proxy from '../../generated-artifacts/ERC20Proxy.json';
-import * as ERC721Proxy from '../../generated-artifacts/ERC721Proxy.json';
-import * as IAssetData from '../../generated-artifacts/IAssetData.json';
-import * as IAssetProxy from '../../generated-artifacts/IAssetProxy.json';
-import * as IAuthorizable from '../../generated-artifacts/IAuthorizable.json';
-import * as MixinAuthorizable from '../../generated-artifacts/MixinAuthorizable.json';
-import * as MultiAssetProxy from '../../generated-artifacts/MultiAssetProxy.json';
-
-export const artifacts = {
-    IAuthorizable: IAuthorizable as ContractArtifact,
-    IAssetData: IAssetData as ContractArtifact,
-    IAssetProxy: IAssetProxy as ContractArtifact,
-    ERC20Proxy: ERC20Proxy as ContractArtifact,
-    ERC721Proxy: ERC721Proxy as ContractArtifact,
-    MixinAuthorizable: MixinAuthorizable as ContractArtifact,
-    MultiAssetProxy: MultiAssetProxy as ContractArtifact,
-};

contracts/asset-proxy/src/wrappers.ts

@@ -0,0 +1,14 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+export * from '../generated-wrappers/erc1155_proxy';
+export * from '../generated-wrappers/erc20_proxy';
+export * from '../generated-wrappers/erc721_proxy';
+export * from '../generated-wrappers/i_asset_data';
+export * from '../generated-wrappers/i_asset_proxy';
+export * from '../generated-wrappers/i_authorizable';
+export * from '../generated-wrappers/lib_asset_data';
+export * from '../generated-wrappers/mixin_authorizable';
+export * from '../generated-wrappers/multi_asset_proxy';

contracts/asset-proxy/src/wrappers/index.ts

@@ -1,7 +0,0 @@
-export * from '../../generated-wrappers/i_asset_data';
-export * from '../../generated-wrappers/i_asset_proxy';
-export * from '../../generated-wrappers/erc20_proxy';
-export * from '../../generated-wrappers/erc721_proxy';
-export * from '../../generated-wrappers/mixin_authorizable';
-export * from '../../generated-wrappers/multi_asset_proxy';
-export * from '../../generated-wrappers/i_authorizable';

contracts/asset-proxy/test/authorizable.ts

@@ -53,16 +53,18 @@ describe('Authorizable', () => {
             );
         });
         it('should allow owner to add an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const isAuthorized = await authorizable.authorized.callAsync(address);
             expect(isAuthorized).to.be.true();
         });
         it('should throw if owner attempts to authorize a duplicate address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             return expectTransactionFailedAsync(
@@ -74,8 +76,9 @@ describe('Authorizable', () => {
 
     describe('removeAuthorizedAddress', () => {
         it('should throw if not called by owner', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             return expectTransactionFailedAsync(
@@ -87,14 +90,14 @@ describe('Authorizable', () => {
         });
 
         it('should allow owner to remove an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
+            await authorizable.removeAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const isAuthorized = await authorizable.authorized.callAsync(address);
@@ -113,8 +116,9 @@ describe('Authorizable', () => {
 
     describe('removeAuthorizedAddressAtIndex', () => {
         it('should throw if not called by owner', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const index = new BigNumber(0);
@@ -126,8 +130,9 @@ describe('Authorizable', () => {
             );
         });
         it('should throw if index is >= authorities.length', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const index = new BigNumber(1);
@@ -150,12 +155,14 @@ describe('Authorizable', () => {
         it('should throw if address at index does not match target', async () => {
             const address1 = address;
             const address2 = notOwner;
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address1, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address1,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address2, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address2,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const address1Index = new BigNumber(0);
@@ -167,15 +174,16 @@ describe('Authorizable', () => {
             );
         });
         it('should allow owner to remove an authorized address', async () => {
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, { from: owner }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const index = new BigNumber(0);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddressAtIndex.sendTransactionAsync(address, index, {
-                    from: owner,
-                }),
+            await authorizable.removeAuthorizedAddressAtIndex.awaitTransactionSuccessAsync(
+                address,
+                index,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const isAuthorized = await authorizable.authorized.callAsync(address);
@@ -187,20 +195,17 @@ describe('Authorizable', () => {
         it('should return all authorized addresses', async () => {
             const initial = await authorizable.getAuthorizedAddresses.callAsync();
             expect(initial).to.have.length(0);
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.addAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
+            await authorizable.addAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const afterAdd = await authorizable.getAuthorizedAddresses.callAsync();
             expect(afterAdd).to.have.length(1);
             expect(afterAdd).to.include(address);
-
-            await web3Wrapper.awaitTransactionSuccessAsync(
-                await authorizable.removeAuthorizedAddress.sendTransactionAsync(address, {
-                    from: owner,
-                }),
+            await authorizable.removeAuthorizedAddress.awaitTransactionSuccessAsync(
+                address,
+                { from: owner },
                 constants.AWAIT_TRANSACTION_MINED_MS,
             );
             const afterRemove = await authorizable.getAuthorizedAddresses.callAsync();

contracts/asset-proxy/test/erc1155_proxy.ts

@@ -0,0 +1,831 @@
+import {
+    artifacts as erc1155Artifacts,
+    DummyERC1155ReceiverBatchTokenReceivedEventArgs,
+    DummyERC1155ReceiverContract,
+    ERC1155MintableContract,
+    Erc1155Wrapper,
+} from '@0x/contracts-erc1155';
+import {
+    chaiSetup,
+    constants,
+    expectTransactionFailedAsync,
+    expectTransactionFailedWithoutReasonAsync,
+    provider,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { AssetProxyId, RevertReason } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { ERC1155ProxyWrapper, ERC721ProxyContract } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+// tslint:disable:no-unnecessary-type-assertion
+describe('ERC1155Proxy', () => {
+    // constant values used in transfer tests
+    const nftOwnerBalance = new BigNumber(1);
+    const nftNotOwnerBalance = new BigNumber(0);
+    const spenderInitialFungibleBalance = constants.INITIAL_ERC1155_FUNGIBLE_BALANCE;
+    const receiverInitialFungibleBalance = constants.INITIAL_ERC1155_FUNGIBLE_BALANCE;
+    const receiverContractInitialFungibleBalance = new BigNumber(0);
+    const fungibleValueToTransferSmall = spenderInitialFungibleBalance.div(100);
+    const fungibleValueToTransferLarge = spenderInitialFungibleBalance.div(4);
+    const valueMultiplierSmall = new BigNumber(2);
+    const valueMultiplierNft = new BigNumber(1);
+    const nonFungibleValueToTransfer = nftOwnerBalance;
+    const receiverCallbackData = '0x01020304';
+    // addresses
+    let owner: string;
+    let notAuthorized: string;
+    let authorized: string;
+    let spender: string;
+    let receiver: string;
+    let receiverContract: string;
+    // contracts & wrappers
+    let erc1155Proxy: ERC721ProxyContract;
+    let erc1155Receiver: DummyERC1155ReceiverContract;
+    let erc1155ProxyWrapper: ERC1155ProxyWrapper;
+    let erc1155Contract: ERC1155MintableContract;
+    let erc1155Wrapper: Erc1155Wrapper;
+    // tokens
+    let fungibleTokens: BigNumber[];
+    let nonFungibleTokensOwnedBySpender: BigNumber[];
+    // tests
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        /// deploy & configure ERC1155Proxy
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        const usedAddresses = ([owner, notAuthorized, authorized, spender, receiver] = _.slice(accounts, 0, 5));
+        erc1155ProxyWrapper = new ERC1155ProxyWrapper(provider, usedAddresses, owner);
+        erc1155Proxy = await erc1155ProxyWrapper.deployProxyAsync();
+        await erc1155Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            authorized,
+            { from: owner },
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await erc1155Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            erc1155Proxy.address,
+            { from: owner },
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        // deploy & configure ERC1155 tokens and receiver
+        [erc1155Wrapper] = await erc1155ProxyWrapper.deployDummyContractsAsync();
+        erc1155Contract = erc1155Wrapper.getContract();
+        erc1155Receiver = await DummyERC1155ReceiverContract.deployFrom0xArtifactAsync(
+            erc1155Artifacts.DummyERC1155Receiver,
+            provider,
+            txDefaults,
+        );
+        receiverContract = erc1155Receiver.address;
+        await erc1155ProxyWrapper.setBalancesAndAllowancesAsync();
+        fungibleTokens = erc1155ProxyWrapper.getFungibleTokenIds();
+        const nonFungibleTokens = erc1155ProxyWrapper.getNonFungibleTokenIds();
+        const tokenBalances = await erc1155ProxyWrapper.getBalancesAsync();
+        nonFungibleTokensOwnedBySpender = [];
+        _.each(nonFungibleTokens, (nonFungibleToken: BigNumber) => {
+            const nonFungibleTokenAsString = nonFungibleToken.toString();
+            const nonFungibleTokenHeldBySpender =
+                tokenBalances.nonFungible[spender][erc1155Contract.address][nonFungibleTokenAsString][0];
+            nonFungibleTokensOwnedBySpender.push(nonFungibleTokenHeldBySpender);
+        });
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('general', () => {
+        it('should revert if undefined function is called', async () => {
+            const undefinedSelector = '0x01020304';
+            await expectTransactionFailedWithoutReasonAsync(
+                web3Wrapper.sendTransactionAsync({
+                    from: owner,
+                    to: erc1155Proxy.address,
+                    value: constants.ZERO_AMOUNT,
+                    data: undefinedSelector,
+                }),
+            );
+        });
+        it('should have an id of 0x9645780d', async () => {
+            const proxyId = await erc1155Proxy.getProxyId.callAsync();
+            const expectedProxyId = AssetProxyId.ERC1155;
+            expect(proxyId).to.equal(expectedProxyId);
+        });
+    });
+    describe('transferFrom', () => {
+        it('should successfully transfer value for a single, fungible token', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const totalValueTransferred = valuesToTransfer[0].times(valueMultiplier);
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(totalValueTransferred),
+                receiverInitialFungibleBalance.plus(totalValueTransferred),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer value for the same fungible token several times', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = fungibleTokens[0];
+            const tokensToTransfer = [tokenToTransfer, tokenToTransfer, tokenToTransfer];
+            const valuesToTransfer = [
+                fungibleValueToTransferSmall.plus(10),
+                fungibleValueToTransferSmall.plus(20),
+                fungibleValueToTransferSmall.plus(30),
+            ];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                spenderInitialFungibleBalance,
+                // receiver
+                receiverInitialFungibleBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            let totalValueTransferred = _.reduce(valuesToTransfer, (sum: BigNumber, value: BigNumber) => {
+                return sum.plus(value);
+            }) as BigNumber;
+            totalValueTransferred = totalValueTransferred.times(valueMultiplier);
+            const expectedFinalBalances = [
+                // spender
+                spenderInitialFungibleBalance.minus(totalValueTransferred),
+                // receiver
+                receiverInitialFungibleBalance.plus(totalValueTransferred),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedFinalBalances);
+        });
+        it('should successfully transfer value for several fungible tokens', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 3);
+            const valuesToTransfer = [
+                fungibleValueToTransferSmall.plus(10),
+                fungibleValueToTransferSmall.plus(20),
+                fungibleValueToTransferSmall.plus(30),
+            ];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                spenderInitialFungibleBalance,
+                spenderInitialFungibleBalance,
+                spenderInitialFungibleBalance,
+                // receiver
+                receiverInitialFungibleBalance,
+                receiverInitialFungibleBalance,
+                receiverInitialFungibleBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                return value.times(valueMultiplier);
+            });
+            const expectedFinalBalances = [
+                // spender
+                spenderInitialFungibleBalance.minus(totalValuesTransferred[0]),
+                spenderInitialFungibleBalance.minus(totalValuesTransferred[1]),
+                spenderInitialFungibleBalance.minus(totalValuesTransferred[2]),
+                // receiver
+                receiverInitialFungibleBalance.plus(totalValuesTransferred[0]),
+                receiverInitialFungibleBalance.plus(totalValuesTransferred[1]),
+                receiverInitialFungibleBalance.plus(totalValuesTransferred[2]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer a non-fungible token', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 1);
+            const valuesToTransfer = [nonFungibleValueToTransfer];
+            const valueMultiplier = valueMultiplierNft;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                // spender
+                nftNotOwnerBalance,
+                // receiver
+                nftOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer multiple non-fungible tokens', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 3);
+            const valuesToTransfer = [
+                nonFungibleValueToTransfer,
+                nonFungibleValueToTransfer,
+                nonFungibleValueToTransfer,
+            ];
+            const valueMultiplier = valueMultiplierNft;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                nftOwnerBalance,
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                // spender
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+                // receiver
+                nftOwnerBalance,
+                nftOwnerBalance,
+                nftOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer value for a combination of several fungible/non-fungible tokens', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const fungibleTokensToTransfer = fungibleTokens.slice(0, 3);
+            const nonFungibleTokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 2);
+            const tokensToTransfer = fungibleTokensToTransfer.concat(nonFungibleTokensToTransfer);
+            const valuesToTransfer = [
+                fungibleValueToTransferLarge,
+                fungibleValueToTransferSmall,
+                fungibleValueToTransferSmall,
+                nonFungibleValueToTransfer,
+                nonFungibleValueToTransfer,
+            ];
+            const valueMultiplier = valueMultiplierNft;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                spenderInitialFungibleBalance,
+                spenderInitialFungibleBalance,
+                spenderInitialFungibleBalance,
+                nftOwnerBalance,
+                nftOwnerBalance,
+                // receiver
+                receiverInitialFungibleBalance,
+                receiverInitialFungibleBalance,
+                receiverInitialFungibleBalance,
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                return value.times(valueMultiplier);
+            });
+            const expectedFinalBalances = [
+                // spender
+                expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                expectedInitialBalances[1].minus(totalValuesTransferred[1]),
+                expectedInitialBalances[2].minus(totalValuesTransferred[2]),
+                expectedInitialBalances[3].minus(totalValuesTransferred[3]),
+                expectedInitialBalances[4].minus(totalValuesTransferred[4]),
+                // receiver
+                expectedInitialBalances[5].plus(totalValuesTransferred[0]),
+                expectedInitialBalances[6].plus(totalValuesTransferred[1]),
+                expectedInitialBalances[7].plus(totalValuesTransferred[2]),
+                expectedInitialBalances[8].plus(totalValuesTransferred[3]),
+                expectedInitialBalances[9].plus(totalValuesTransferred[4]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer value to a smart contract and trigger its callback', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiverContract];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                return value.times(valueMultiplier);
+            });
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverContractInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            const txReceipt = await erc1155ProxyWrapper.transferFromWithLogsAsync(
+                spender,
+                receiverContract,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check receiver log ignored extra asset data
+            expect(txReceipt.logs.length).to.be.equal(2);
+            const receiverLog = txReceipt.logs[1] as LogWithDecodedArgs<
+                DummyERC1155ReceiverBatchTokenReceivedEventArgs
+            >;
+            expect(receiverLog.args.operator).to.be.equal(erc1155Proxy.address);
+            expect(receiverLog.args.from).to.be.equal(spender);
+            expect(receiverLog.args.tokenIds.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenIds[0]).to.be.bignumber.equal(tokensToTransfer[0]);
+            expect(receiverLog.args.tokenValues.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenValues[0]).to.be.bignumber.equal(totalValuesTransferred[0]);
+            // note - if the `extraData` is ignored then the receiver log should ignore it as well.
+            expect(receiverLog.args.data).to.be.deep.equal(receiverCallbackData);
+            // check balances after transfer
+            const expectedFinalBalances = [
+                expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                expectedInitialBalances[1].plus(totalValuesTransferred[0]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer value to a smart contract and trigger its callback, when callback `data` is NULL', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiverContract];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                return value.times(valueMultiplier);
+            });
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverContractInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            const nullReceiverCallbackData = '0x';
+            const txReceipt = await erc1155ProxyWrapper.transferFromWithLogsAsync(
+                spender,
+                receiverContract,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                nullReceiverCallbackData,
+                authorized,
+            );
+            // check receiver log ignored extra asset data
+            expect(txReceipt.logs.length).to.be.equal(2);
+            const receiverLog = txReceipt.logs[1] as LogWithDecodedArgs<
+                DummyERC1155ReceiverBatchTokenReceivedEventArgs
+            >;
+            expect(receiverLog.args.operator).to.be.equal(erc1155Proxy.address);
+            expect(receiverLog.args.from).to.be.equal(spender);
+            expect(receiverLog.args.tokenIds.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenIds[0]).to.be.bignumber.equal(tokensToTransfer[0]);
+            expect(receiverLog.args.tokenValues.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenValues[0]).to.be.bignumber.equal(totalValuesTransferred[0]);
+            // note - if the `extraData` is ignored then the receiver log should ignore it as well.
+            expect(receiverLog.args.data).to.be.deep.equal(nullReceiverCallbackData);
+            // check balances after transfer
+            const expectedFinalBalances = [
+                expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                expectedInitialBalances[1].plus(totalValuesTransferred[0]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should successfully transfer value and ignore extra assetData', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiverContract];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                return value.times(valueMultiplier);
+            });
+            const extraData = '0102030405060708';
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverContractInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            const txReceipt = await erc1155ProxyWrapper.transferFromWithLogsAsync(
+                spender,
+                receiverContract,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+                extraData,
+            );
+            // check receiver log ignored extra asset data
+            expect(txReceipt.logs.length).to.be.equal(2);
+            const receiverLog = txReceipt.logs[1] as LogWithDecodedArgs<
+                DummyERC1155ReceiverBatchTokenReceivedEventArgs
+            >;
+            expect(receiverLog.args.operator).to.be.equal(erc1155Proxy.address);
+            expect(receiverLog.args.from).to.be.equal(spender);
+            expect(receiverLog.args.tokenIds.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenIds[0]).to.be.bignumber.equal(tokensToTransfer[0]);
+            expect(receiverLog.args.tokenValues.length).to.be.deep.equal(1);
+            expect(receiverLog.args.tokenValues[0]).to.be.bignumber.equal(totalValuesTransferred[0]);
+            // note - if the `extraData` is ignored then the receiver log should ignore it as well.
+            expect(receiverLog.args.data).to.be.deep.equal(receiverCallbackData);
+            // check balances after transfer
+            const expectedFinalBalances = [
+                expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                expectedInitialBalances[1].plus(totalValuesTransferred[0]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should transfer nothing if value is zero', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [new BigNumber(0)];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should transfer nothing if value multiplier is zero', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = new BigNumber(0);
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should transfer nothing if there are no tokens in asset data', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer: BigNumber[] = [];
+            const valuesToTransfer: BigNumber[] = [];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155ProxyWrapper.transferFromAsync(
+                spender,
+                receiver,
+                erc1155Contract.address,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorized,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should propagate revert reason from erc1155 contract failure', async () => {
+            // disable transfers
+            const shouldRejectTransfer = true;
+            await erc1155Receiver.setRejectTransferFlag.awaitTransactionSuccessAsync(
+                shouldRejectTransfer,
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            // setup test parameters
+            const tokenHolders = [spender, receiverContract];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverContractInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiverContract,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.TransferRejected,
+            );
+        });
+        it('should revert if transferring the same non-fungible token more than once', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const nftToTransfer = nonFungibleTokensOwnedBySpender[0];
+            const tokensToTransfer = [nftToTransfer, nftToTransfer];
+            const valuesToTransfer = [nonFungibleValueToTransfer, nonFungibleValueToTransfer];
+            const valueMultiplier = valueMultiplierNft;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.NFTNotOwnedByFromAddress,
+            );
+        });
+        it('should revert if there is a multiplication overflow', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 3);
+            const maxUintValue = new BigNumber(2).pow(256).minus(1);
+            const valuesToTransfer = [nonFungibleValueToTransfer, maxUintValue, nonFungibleValueToTransfer];
+            const valueMultiplier = new BigNumber(2);
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                nftOwnerBalance,
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            // note - this will overflow because we are trying to transfer `maxUintValue * 2` of the 2nd token
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.Uint256Overflow,
+            );
+        });
+        it('should revert if transferring > 1 instances of a non-fungible token (valueMultiplier field >1)', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 1);
+            const valuesToTransfer = [nonFungibleValueToTransfer];
+            const valueMultiplier = new BigNumber(2);
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.AmountEqualToOneRequired,
+            );
+        });
+        it('should revert if transferring > 1 instances of a non-fungible token (`valuesToTransfer` field >1)', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = nonFungibleTokensOwnedBySpender.slice(0, 1);
+            const valuesToTransfer = [new BigNumber(2)];
+            const valueMultiplier = valueMultiplierNft;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                nftOwnerBalance,
+                // receiver
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.AmountEqualToOneRequired,
+            );
+        });
+        it('should revert if sender balance is insufficient', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valueGreaterThanSpenderBalance = spenderInitialFungibleBalance.plus(1);
+            const valuesToTransfer = [valueGreaterThanSpenderBalance];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.Uint256Underflow,
+            );
+        });
+        it('should revert if sender allowance is insufficient', async () => {
+            // dremove allowance for ERC1155 proxy
+            const wrapper = erc1155ProxyWrapper.getContractWrapper(erc1155Contract.address);
+            const isApproved = false;
+            await wrapper.setApprovalForAllAsync(spender, erc1155Proxy.address, isApproved);
+            const isApprovedActualValue = await wrapper.isApprovedForAllAsync(spender, erc1155Proxy.address);
+            expect(isApprovedActualValue).to.be.equal(isApproved);
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    authorized,
+                ),
+                RevertReason.InsufficientAllowance,
+            );
+        });
+        it('should revert if caller is not authorized', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = fungibleTokens.slice(0, 1);
+            const valuesToTransfer = [fungibleValueToTransferLarge];
+            const valueMultiplier = valueMultiplierSmall;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155ProxyWrapper.transferFromAsync(
+                    spender,
+                    receiver,
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    valueMultiplier,
+                    receiverCallbackData,
+                    notAuthorized,
+                ),
+                RevertReason.SenderNotAuthorized,
+            );
+        });
+    });
+});
+// tslint:enable:no-unnecessary-type-assertion
+// tslint:disable:max-file-line-count

contracts/asset-proxy/test/global_hooks.ts

@@ -1,8 +1,10 @@
 import { env, EnvVars } from '@0x/dev-utils';
 
 import { coverage, profiler, provider } from '@0x/contracts-test-utils';
+import { providerUtils } from '@0x/utils';
+
 before('start web3 provider', () => {
-    provider.start();
+    providerUtils.startProviderEngine(provider);
 });
 after('generate coverage report', async () => {
     if (env.parseBoolean(EnvVars.SolidityCoverage)) {

contracts/asset-proxy/test/lib_asset_data.ts

@@ -0,0 +1,426 @@
+// TODO: change test titles to say "... from asset data"
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+
+import {
+    artifacts as erc1155Artifacts,
+    ERC1155MintableContract,
+    ERC1155TransferSingleEventArgs,
+    IERC1155MintableContract,
+} from '@0x/contracts-erc1155';
+import { artifacts as erc20Artifacts, DummyERC20TokenContract, IERC20TokenContract } from '@0x/contracts-erc20';
+import { artifacts as erc721Artifacts, DummyERC721TokenContract, IERC721TokenContract } from '@0x/contracts-erc721';
+import { chaiSetup, constants, LogDecoder, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { AssetProxyId } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+
+import { artifacts, LibAssetDataContract } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+const KNOWN_ERC20_ENCODING = {
+    address: '0x1dc4c1cefef38a777b15aa20260a54e584b16c48',
+    assetData: '0xf47261b00000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c48',
+};
+const KNOWN_ERC721_ENCODING = {
+    address: '0x1dc4c1cefef38a777b15aa20260a54e584b16c48',
+    tokenId: new BigNumber(1),
+    assetData:
+        '0x025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000001',
+};
+const KNOWN_ERC1155_ENCODING = {
+    tokenAddress: '0x1dc4c1cefef38a777b15aa20260a54e584b16c48',
+    tokenIds: [new BigNumber(100), new BigNumber(1001), new BigNumber(10001)],
+    tokenValues: [new BigNumber(200), new BigNumber(2001), new BigNumber(20001)],
+    callbackData:
+        '0x025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000001',
+    assetData:
+        '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',
+};
+const KNOWN_MULTI_ASSET_ENCODING = {
+    amounts: [new BigNumber(70), new BigNumber(1), new BigNumber(18)],
+    nestedAssetData: [
+        KNOWN_ERC20_ENCODING.assetData,
+        KNOWN_ERC721_ENCODING.assetData,
+        KNOWN_ERC1155_ENCODING.assetData,
+    ],
+    assetData:
+        '0x94cfcdd7000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000000030000000000000000000000000000000000000000000000000000000000000046000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000120000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000c000000000000000000000000000000000000000000000000000000000000001400000000000000000000000000000000000000000000000000000000000000024f47261b00000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c48000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000204a7cb5fb70000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c480000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001800000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000000000000000000000000000000000006400000000000000000000000000000000000000000000000000000000000003e90000000000000000000000000000000000000000000000000000000000002711000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000000000000000000000000000000000000c800000000000000000000000000000000000000000000000000000000000007d10000000000000000000000000000000000000000000000000000000000004e210000000000000000000000000000000000000000000000000000000000000044025717920000000000000000000000001dc4c1cefef38a777b15aa20260a54e584b16c4800000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
+};
+
+describe('LibAssetData', () => {
+    let libAssetData: LibAssetDataContract;
+
+    let tokenOwnerAddress: string;
+    let approvedSpenderAddress: string;
+    let anotherApprovedSpenderAddress: string;
+
+    let erc20TokenAddress: string;
+    const erc20TokenTotalSupply = new BigNumber(1);
+
+    let erc721TokenAddress: string;
+    const firstERC721TokenId = new BigNumber(1);
+    const numberOfERC721Tokens = 10;
+
+    let erc1155MintableAddress: string;
+    let erc1155TokenId: BigNumber;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+
+        libAssetData = await LibAssetDataContract.deployFrom0xArtifactAsync(
+            artifacts.LibAssetData,
+            provider,
+            txDefaults,
+        );
+
+        [
+            tokenOwnerAddress,
+            approvedSpenderAddress,
+            anotherApprovedSpenderAddress,
+        ] = await web3Wrapper.getAvailableAddressesAsync();
+
+        erc20TokenAddress = (await DummyERC20TokenContract.deployFrom0xArtifactAsync(
+            erc20Artifacts.DummyERC20Token,
+            provider,
+            txDefaults,
+            'Dummy',
+            'DUM',
+            new BigNumber(1),
+            erc20TokenTotalSupply,
+        )).address;
+
+        const erc721TokenContract = await DummyERC721TokenContract.deployFrom0xArtifactAsync(
+            erc721Artifacts.DummyERC721Token,
+            provider,
+            txDefaults,
+            'Dummy',
+            'DUM',
+        );
+        erc721TokenAddress = erc721TokenContract.address;
+        // mint `numberOfERC721Tokens` tokens
+        const transactionMinedPromises = [];
+        for (let i = 0; i < numberOfERC721Tokens; i++) {
+            transactionMinedPromises.push(
+                web3Wrapper.awaitTransactionSuccessAsync(
+                    await erc721TokenContract.mint.sendTransactionAsync(
+                        tokenOwnerAddress,
+                        firstERC721TokenId.plus(i - 1),
+                    ),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                ),
+            );
+        }
+        await Promise.all(transactionMinedPromises);
+
+        const erc1155MintableContract = await ERC1155MintableContract.deployFrom0xArtifactAsync(
+            erc1155Artifacts.ERC1155Mintable,
+            provider,
+            txDefaults,
+        );
+        erc1155MintableAddress = erc1155MintableContract.address;
+        // Somewhat re-inventing the wheel here, but the prior art currently
+        // exists only as an unexported test util in the erc1155 package
+        // (Erc1155Wrapper.mintFungibleTokensAsync() in erc1155/test/utils/).
+        // This is concise enough to justify duplication, but it sure is ugly.
+        // tslint:disable-next-line no-unnecessary-type-assertion
+        erc1155TokenId = ((await new LogDecoder(web3Wrapper, erc1155Artifacts).getTxWithDecodedLogsAsync(
+            await erc1155MintableContract.create.sendTransactionAsync('uri:Dummy', /*isNonFungible:*/ false),
+        )).logs[0] as LogWithDecodedArgs<ERC1155TransferSingleEventArgs>).args.id;
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc1155MintableContract.mintFungible.sendTransactionAsync(
+                erc1155TokenId,
+                [tokenOwnerAddress],
+                [new BigNumber(1)],
+            ),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+    });
+
+    async function setERC20AllowanceAsync(): Promise<any> {
+        return web3Wrapper.awaitTransactionSuccessAsync(
+            await new IERC20TokenContract(
+                erc20Artifacts.IERC20Token.compilerOutput.abi,
+                erc20TokenAddress,
+                provider,
+            ).approve.sendTransactionAsync(approvedSpenderAddress, new BigNumber(1), { from: tokenOwnerAddress }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+    }
+
+    async function setERC721AllowanceAsync(): Promise<any> {
+        return web3Wrapper.awaitTransactionSuccessAsync(
+            await new IERC721TokenContract(
+                erc721Artifacts.IERC721Token.compilerOutput.abi,
+                erc721TokenAddress,
+                provider,
+            ).approve.sendTransactionAsync(approvedSpenderAddress, new BigNumber(1), { from: tokenOwnerAddress }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+    }
+
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    it('should have a deployed-to address', () => {
+        expect(libAssetData.address.slice(0, 2)).to.equal('0x');
+    });
+
+    it('should encode ERC20 asset data', async () => {
+        expect(await libAssetData.encodeERC20AssetData.callAsync(KNOWN_ERC20_ENCODING.address)).to.equal(
+            KNOWN_ERC20_ENCODING.assetData,
+        );
+    });
+
+    it('should decode ERC20 asset data', async () => {
+        expect(await libAssetData.decodeERC20AssetData.callAsync(KNOWN_ERC20_ENCODING.assetData)).to.deep.equal([
+            AssetProxyId.ERC20,
+            KNOWN_ERC20_ENCODING.address,
+        ]);
+    });
+
+    it('should encode ERC721 asset data', async () => {
+        expect(
+            await libAssetData.encodeERC721AssetData.callAsync(
+                KNOWN_ERC721_ENCODING.address,
+                KNOWN_ERC721_ENCODING.tokenId,
+            ),
+        ).to.equal(KNOWN_ERC721_ENCODING.assetData);
+    });
+
+    it('should decode ERC721 asset data', async () => {
+        expect(await libAssetData.decodeERC721AssetData.callAsync(KNOWN_ERC721_ENCODING.assetData)).to.deep.equal([
+            AssetProxyId.ERC721,
+            KNOWN_ERC721_ENCODING.address,
+            KNOWN_ERC721_ENCODING.tokenId,
+        ]);
+    });
+
+    it('should encode ERC1155 asset data', async () => {
+        expect(
+            await libAssetData.encodeERC1155AssetData.callAsync(
+                KNOWN_ERC1155_ENCODING.tokenAddress,
+                KNOWN_ERC1155_ENCODING.tokenIds,
+                KNOWN_ERC1155_ENCODING.tokenValues,
+                KNOWN_ERC1155_ENCODING.callbackData,
+            ),
+        ).to.equal(KNOWN_ERC1155_ENCODING.assetData);
+    });
+
+    it('should decode ERC1155 asset data', async () => {
+        expect(await libAssetData.decodeERC1155AssetData.callAsync(KNOWN_ERC1155_ENCODING.assetData)).to.deep.equal([
+            AssetProxyId.ERC1155,
+            KNOWN_ERC1155_ENCODING.tokenAddress,
+            KNOWN_ERC1155_ENCODING.tokenIds,
+            KNOWN_ERC1155_ENCODING.tokenValues,
+            KNOWN_ERC1155_ENCODING.callbackData,
+        ]);
+    });
+
+    it('should encode multiasset data', async () => {
+        expect(
+            await libAssetData.encodeMultiAssetData.callAsync(
+                KNOWN_MULTI_ASSET_ENCODING.amounts,
+                KNOWN_MULTI_ASSET_ENCODING.nestedAssetData,
+            ),
+        ).to.equal(KNOWN_MULTI_ASSET_ENCODING.assetData);
+    });
+
+    it('should decode multiasset data', async () => {
+        expect(await libAssetData.decodeMultiAssetData.callAsync(KNOWN_MULTI_ASSET_ENCODING.assetData)).to.deep.equal([
+            AssetProxyId.MultiAsset,
+            KNOWN_MULTI_ASSET_ENCODING.amounts,
+            KNOWN_MULTI_ASSET_ENCODING.nestedAssetData,
+        ]);
+    });
+
+    it('should query ERC20 balance by asset data', async () => {
+        expect(
+            await libAssetData.getBalance.callAsync(
+                tokenOwnerAddress,
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+            ),
+        ).to.bignumber.equal(erc20TokenTotalSupply);
+    });
+
+    it('should query ERC721 balance by asset data', async () => {
+        expect(
+            await libAssetData.getBalance.callAsync(
+                tokenOwnerAddress,
+                await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query ERC1155 balances by asset data', async () => {
+        expect(
+            await libAssetData.getBalance.callAsync(
+                tokenOwnerAddress,
+                await libAssetData.encodeERC1155AssetData.callAsync(
+                    erc1155MintableAddress,
+                    [erc1155TokenId],
+                    [new BigNumber(1)], // token values
+                    '0x', // callback data
+                ),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query multi-asset batch balance by asset data', async () => {
+        expect(
+            await libAssetData.getBalance.callAsync(
+                tokenOwnerAddress,
+                await libAssetData.encodeMultiAssetData.callAsync(
+                    [new BigNumber(1), new BigNumber(1)],
+                    [
+                        await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+                        await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+                    ],
+                ),
+            ),
+        ).to.bignumber.equal(Math.min(erc20TokenTotalSupply.toNumber(), numberOfERC721Tokens));
+    });
+
+    it('should query ERC20 allowances by asset data', async () => {
+        await setERC20AllowanceAsync();
+        expect(
+            await libAssetData.getAllowance.callAsync(
+                tokenOwnerAddress,
+                approvedSpenderAddress,
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query ERC721 approval by asset data', async () => {
+        await setERC721AllowanceAsync();
+        expect(
+            await libAssetData.getAllowance.callAsync(
+                tokenOwnerAddress,
+                approvedSpenderAddress,
+                await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query ERC721 approvalForAll by assetData', async () => {
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await new IERC721TokenContract(
+                erc721Artifacts.IERC721Token.compilerOutput.abi,
+                erc721TokenAddress,
+                provider,
+            ).setApprovalForAll.sendTransactionAsync(anotherApprovedSpenderAddress, true, {
+                from: tokenOwnerAddress,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        expect(
+            await libAssetData.getAllowance.callAsync(
+                tokenOwnerAddress,
+                anotherApprovedSpenderAddress,
+                await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query ERC1155 allowances by asset data', async () => {
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await new IERC1155MintableContract(
+                erc1155Artifacts.IERC1155Mintable.compilerOutput.abi,
+                erc1155MintableAddress,
+                provider,
+            ).setApprovalForAll.sendTransactionAsync(approvedSpenderAddress, true, { from: tokenOwnerAddress }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        expect(
+            await libAssetData.getAllowance.callAsync(
+                tokenOwnerAddress,
+                approvedSpenderAddress,
+                await libAssetData.encodeERC1155AssetData.callAsync(
+                    erc1155MintableAddress,
+                    [erc1155TokenId],
+                    [new BigNumber(1)],
+                    '0x',
+                ),
+            ),
+        ).to.bignumber.equal(1);
+    });
+
+    it('should query multi-asset allowances by asset data', async () => {
+        await setERC20AllowanceAsync();
+        await setERC721AllowanceAsync();
+        expect(
+            await libAssetData.getAllowance.callAsync(
+                tokenOwnerAddress,
+                approvedSpenderAddress,
+                await libAssetData.encodeMultiAssetData.callAsync(
+                    [new BigNumber(1), new BigNumber(1)],
+                    [
+                        await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+                        await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+                    ],
+                ),
+            ),
+        ).to.bignumber.equal(1);
+        return;
+    });
+
+    it('should query balances for a batch of asset data strings', async () => {
+        expect(
+            await libAssetData.getBatchBalances.callAsync(tokenOwnerAddress, [
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+                await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ]),
+        ).to.deep.equal([new BigNumber(erc20TokenTotalSupply), new BigNumber(1)]);
+    });
+
+    it('should query allowances for a batch of asset data strings', async () => {
+        await setERC20AllowanceAsync();
+        await setERC721AllowanceAsync();
+        expect(
+            await libAssetData.getBatchAllowances.callAsync(tokenOwnerAddress, approvedSpenderAddress, [
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+                await libAssetData.encodeERC721AssetData.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ]),
+        ).to.deep.equal([new BigNumber(1), new BigNumber(1)]);
+    });
+
+    describe('getERC721TokenOwner', async () => {
+        it('should return the null address when tokenId is not owned', async () => {
+            const nonexistentTokenId = new BigNumber(1234567890);
+            expect(
+                await libAssetData.getERC721TokenOwner.callAsync(erc721TokenAddress, nonexistentTokenId),
+            ).to.be.equal(constants.NULL_ADDRESS);
+        });
+        it('should return the owner address when tokenId is owned', async () => {
+            expect(
+                await libAssetData.getERC721TokenOwner.callAsync(erc721TokenAddress, firstERC721TokenId),
+            ).to.be.equal(tokenOwnerAddress);
+        });
+    });
+
+    it('should query balance and allowance together, from asset data', async () => {
+        await setERC20AllowanceAsync();
+        expect(
+            await libAssetData.getBalanceAndAllowance.callAsync(
+                tokenOwnerAddress,
+                approvedSpenderAddress,
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+            ),
+        ).to.deep.equal([new BigNumber(erc20TokenTotalSupply), new BigNumber(1)]);
+    });
+
+    it('should query balances and allowances together, from an asset data array', async () => {
+        await setERC20AllowanceAsync();
+        expect(
+            await libAssetData.getBatchBalancesAndAllowances.callAsync(tokenOwnerAddress, approvedSpenderAddress, [
+                await libAssetData.encodeERC20AssetData.callAsync(erc20TokenAddress),
+            ]),
+        ).to.deep.equal([[new BigNumber(erc20TokenTotalSupply)], [new BigNumber(1)]]);
+    });
+});

contracts/asset-proxy/test/proxies.ts

@@ -1,3 +1,4 @@
+import { ERC1155MintableContract, Erc1155Wrapper } from '@0x/contracts-erc1155';
 import {
     artifacts as erc20Artifacts,
     DummyERC20TokenContract,
@@ -30,6 +31,7 @@ import * as _ from 'lodash';
 
 import {
     artifacts,
+    ERC1155ProxyWrapper,
     ERC20ProxyContract,
     ERC20Wrapper,
     ERC721ProxyContract,
@@ -77,6 +79,15 @@ describe('Asset Transfer Proxies', () => {
     let erc721AFromTokenId: BigNumber;
     let erc721BFromTokenId: BigNumber;
 
+    let erc1155Proxy: ERC721ProxyContract;
+    let erc1155ProxyWrapper: ERC1155ProxyWrapper;
+    let erc1155Contract: ERC1155MintableContract;
+    let erc1155Contract2: ERC1155MintableContract;
+    let erc1155Wrapper: Erc1155Wrapper;
+    let erc1155Wrapper2: Erc1155Wrapper;
+    let erc1155FungibleTokens: BigNumber[];
+    let erc1155NonFungibleTokensOwnedBySpender: BigNumber[];
+
     before(async () => {
         await blockchainLifecycle.startAsync();
     });
@@ -100,50 +111,62 @@ describe('Asset Transfer Proxies', () => {
         );
 
         // Configure ERC20Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
+        await erc20Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            authorized,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
+        await erc20Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            multiAssetProxy.address,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
         // Configure ERC721Proxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
+        await erc721Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            authorized,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await erc721Proxy.addAuthorizedAddress.sendTransactionAsync(multiAssetProxy.address, {
-                from: owner,
-            }),
+        await erc721Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            multiAssetProxy.address,
+            { from: owner },
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        // Configure ERC115Proxy
+        erc1155ProxyWrapper = new ERC1155ProxyWrapper(provider, usedAddresses, owner);
+        erc1155Proxy = await erc1155ProxyWrapper.deployProxyAsync();
+        await erc1155Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            authorized,
+            { from: owner },
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await erc1155Proxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            multiAssetProxy.address,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
         // Configure MultiAssetProxy
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.addAuthorizedAddress.sendTransactionAsync(authorized, {
-                from: owner,
-            }),
+        await multiAssetProxy.addAuthorizedAddress.awaitTransactionSuccessAsync(
+            authorized,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, {
-                from: owner,
-            }),
+        await multiAssetProxy.registerAssetProxy.awaitTransactionSuccessAsync(
+            erc20Proxy.address,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multiAssetProxy.registerAssetProxy.sendTransactionAsync(erc721Proxy.address, {
-                from: owner,
-            }),
+        await multiAssetProxy.registerAssetProxy.awaitTransactionSuccessAsync(
+            erc721Proxy.address,
+            { from: owner },
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        await multiAssetProxy.registerAssetProxy.awaitTransactionSuccessAsync(
+            erc1155Proxy.address,
+            { from: owner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
@@ -173,31 +196,26 @@ describe('Asset Transfer Proxies', () => {
         );
 
         await erc20Wrapper.setBalancesAndAllowancesAsync();
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await noReturnErc20Token.setBalance.sendTransactionAsync(fromAddress, constants.INITIAL_ERC20_BALANCE),
+        await noReturnErc20Token.setBalance.awaitTransactionSuccessAsync(
+            fromAddress,
+            constants.INITIAL_ERC20_BALANCE,
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await noReturnErc20Token.approve.sendTransactionAsync(
-                erc20Proxy.address,
-                constants.INITIAL_ERC20_ALLOWANCE,
-                { from: fromAddress },
-            ),
+        await noReturnErc20Token.approve.awaitTransactionSuccessAsync(
+            erc20Proxy.address,
+            constants.INITIAL_ERC20_ALLOWANCE,
+            { from: fromAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multipleReturnErc20Token.setBalance.sendTransactionAsync(
-                fromAddress,
-                constants.INITIAL_ERC20_BALANCE,
-            ),
+        await multipleReturnErc20Token.setBalance.awaitTransactionSuccessAsync(
+            fromAddress,
+            constants.INITIAL_ERC20_BALANCE,
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
-        await web3Wrapper.awaitTransactionSuccessAsync(
-            await multipleReturnErc20Token.approve.sendTransactionAsync(
-                erc20Proxy.address,
-                constants.INITIAL_ERC20_ALLOWANCE,
-                { from: fromAddress },
-            ),
+        await multipleReturnErc20Token.approve.awaitTransactionSuccessAsync(
+            erc20Proxy.address,
+            constants.INITIAL_ERC20_ALLOWANCE,
+            { from: fromAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
 
@@ -213,6 +231,22 @@ describe('Asset Transfer Proxies', () => {
         const erc721Balances = await erc721Wrapper.getBalancesAsync();
         erc721AFromTokenId = erc721Balances[fromAddress][erc721TokenA.address][0];
         erc721BFromTokenId = erc721Balances[fromAddress][erc721TokenB.address][0];
+
+        // Deploy & configure ERC1155 tokens and receiver
+        [erc1155Wrapper, erc1155Wrapper2] = await erc1155ProxyWrapper.deployDummyContractsAsync();
+        erc1155Contract = erc1155Wrapper.getContract();
+        erc1155Contract2 = erc1155Wrapper2.getContract();
+        await erc1155ProxyWrapper.setBalancesAndAllowancesAsync();
+        erc1155FungibleTokens = erc1155ProxyWrapper.getFungibleTokenIds();
+        const nonFungibleTokens = erc1155ProxyWrapper.getNonFungibleTokenIds();
+        const tokenBalances = await erc1155ProxyWrapper.getBalancesAsync();
+        erc1155NonFungibleTokensOwnedBySpender = [];
+        _.each(nonFungibleTokens, (nonFungibleToken: BigNumber) => {
+            const nonFungibleTokenAsString = nonFungibleToken.toString();
+            const nonFungibleTokenHeldBySpender =
+                tokenBalances.nonFungible[fromAddress][erc1155Contract.address][nonFungibleTokenAsString][0];
+            erc1155NonFungibleTokensOwnedBySpender.push(nonFungibleTokenHeldBySpender);
+        });
     });
     beforeEach(async () => {
         await blockchainLifecycle.startAsync();
@@ -370,10 +404,10 @@ describe('Asset Transfer Proxies', () => {
                     toAddress,
                     amount,
                 );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await erc20TokenA.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: fromAddress,
-                    }),
+                await erc20TokenA.approve.awaitTransactionSuccessAsync(
+                    erc20Proxy.address,
+                    allowance,
+                    { from: fromAddress },
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 const erc20Balances = await erc20Wrapper.getBalancesAsync();
@@ -402,10 +436,10 @@ describe('Asset Transfer Proxies', () => {
                     toAddress,
                     amount,
                 );
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await noReturnErc20Token.approve.sendTransactionAsync(erc20Proxy.address, allowance, {
-                        from: fromAddress,
-                    }),
+                await noReturnErc20Token.approve.awaitTransactionSuccessAsync(
+                    erc20Proxy.address,
+                    allowance,
+                    { from: fromAddress },
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 const initialFromBalance = await noReturnErc20Token.balanceOf.callAsync(fromAddress);
@@ -643,10 +677,10 @@ describe('Asset Transfer Proxies', () => {
                 const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
                 expect(ownerFromAsset).to.be.equal(fromAddress);
                 // Remove transfer approval for fromAddress.
-                await web3Wrapper.awaitTransactionSuccessAsync(
-                    await erc721TokenA.approve.sendTransactionAsync(constants.NULL_ADDRESS, erc721AFromTokenId, {
-                        from: fromAddress,
-                    }),
+                await erc721TokenA.approve.awaitTransactionSuccessAsync(
+                    constants.NULL_ADDRESS,
+                    erc721AFromTokenId,
+                    { from: fromAddress },
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
                 // Perform a transfer; expect this to fail.
@@ -944,6 +978,314 @@ describe('Asset Transfer Proxies', () => {
                 expect(newOwnerFromAsset1).to.be.equal(toAddress);
                 expect(newOwnerFromAsset2).to.be.equal(toAddress);
             });
+            it('should transfer a fungible ERC1155 token', async () => {
+                // setup test parameters
+                const tokenHolders = [fromAddress, toAddress];
+                const tokensToTransfer = erc1155FungibleTokens.slice(0, 1);
+                const valuesToTransfer = [new BigNumber(25)];
+                const valueMultiplier = new BigNumber(23);
+                const receiverCallbackData = '0x0102030405';
+                // check balances before transfer
+                const expectedInitialBalances = [
+                    // from
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    // to
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+                // encode erc1155 asset data
+                const erc1155AssetData = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                );
+                // encode multi-asset data
+                const multiAssetAmount = new BigNumber(5);
+                const amounts = [valueMultiplier];
+                const nestedAssetData = [erc1155AssetData];
+                const assetData = assetDataUtils.encodeMultiAssetData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    multiAssetAmount,
+                );
+                // execute transfer
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                // check balances
+                const totalValueTransferred = valuesToTransfer[0].times(valueMultiplier).times(multiAssetAmount);
+                const expectedFinalBalances = [
+                    // from
+                    expectedInitialBalances[0].minus(totalValueTransferred),
+                    // to
+                    expectedInitialBalances[1].plus(totalValueTransferred),
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+            });
+            it('should successfully transfer multiple fungible tokens of the same ERC1155 contract', async () => {
+                // setup test parameters
+                const tokenHolders = [fromAddress, toAddress];
+                const tokensToTransfer = erc1155FungibleTokens.slice(0, 3);
+                const valuesToTransfer = [new BigNumber(25), new BigNumber(35), new BigNumber(45)];
+                const valueMultiplier = new BigNumber(23);
+                const receiverCallbackData = '0x0102030405';
+                // check balances before transfer
+                const expectedInitialBalances = [
+                    // from
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    // to
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+                // encode erc1155 asset data
+                const erc1155AssetData = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                );
+                // encode multi-asset data
+                const multiAssetAmount = new BigNumber(5);
+                const amounts = [valueMultiplier];
+                const nestedAssetData = [erc1155AssetData];
+                const assetData = assetDataUtils.encodeMultiAssetData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    multiAssetAmount,
+                );
+                // execute transfer
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                // check balances
+                const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                    return value.times(valueMultiplier).times(multiAssetAmount);
+                });
+                const expectedFinalBalances = [
+                    // from
+                    expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                    expectedInitialBalances[1].minus(totalValuesTransferred[1]),
+                    expectedInitialBalances[2].minus(totalValuesTransferred[2]),
+                    // to
+                    expectedInitialBalances[3].plus(totalValuesTransferred[0]),
+                    expectedInitialBalances[4].plus(totalValuesTransferred[1]),
+                    expectedInitialBalances[5].plus(totalValuesTransferred[2]),
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+            });
+            it('should successfully transfer multiple fungible/non-fungible tokens of the same ERC1155 contract', async () => {
+                // setup test parameters
+                const tokenHolders = [fromAddress, toAddress];
+                const fungibleTokensToTransfer = erc1155FungibleTokens.slice(0, 1);
+                const nonFungibleTokensToTransfer = erc1155NonFungibleTokensOwnedBySpender.slice(0, 1);
+                const tokensToTransfer = fungibleTokensToTransfer.concat(nonFungibleTokensToTransfer);
+                const valuesToTransfer = [new BigNumber(25), new BigNumber(1)];
+                const valueMultiplier = new BigNumber(1);
+                const receiverCallbackData = '0x0102030405';
+                // check balances before transfer
+                const nftOwnerBalance = new BigNumber(1);
+                const nftNotOwnerBalance = new BigNumber(0);
+                const expectedInitialBalances = [
+                    // from
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    nftOwnerBalance,
+                    // to
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    nftNotOwnerBalance,
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+                // encode erc1155 asset data
+                const erc1155AssetData = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                );
+                // encode multi-asset data
+                const multiAssetAmount = new BigNumber(1);
+                const amounts = [valueMultiplier];
+                const nestedAssetData = [erc1155AssetData];
+                const assetData = assetDataUtils.encodeMultiAssetData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    multiAssetAmount,
+                );
+                // execute transfer
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                // check balances
+                const totalValuesTransferred = _.map(valuesToTransfer, (value: BigNumber) => {
+                    return value.times(valueMultiplier).times(multiAssetAmount);
+                });
+                const expectedFinalBalances = [
+                    // from
+                    expectedInitialBalances[0].minus(totalValuesTransferred[0]),
+                    expectedInitialBalances[1].minus(totalValuesTransferred[1]),
+                    // to
+                    expectedInitialBalances[2].plus(totalValuesTransferred[0]),
+                    expectedInitialBalances[3].plus(totalValuesTransferred[1]),
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+            });
+            it('should successfully transfer multiple different ERC1155 tokens', async () => {
+                // setup test parameters
+                const tokenHolders = [fromAddress, toAddress];
+                const tokensToTransfer = erc1155FungibleTokens.slice(0, 1);
+                const valuesToTransfer = [new BigNumber(25)];
+                const valueMultiplier = new BigNumber(23);
+                const receiverCallbackData = '0x0102030405';
+                // check balances before transfer
+                const expectedInitialBalances = [
+                    // from
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    // to
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+                await erc1155Wrapper2.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+                // encode erc1155 asset data
+                const erc1155AssetData1 = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                );
+                const erc1155AssetData2 = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract2.address,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                );
+                // encode multi-asset data
+                const multiAssetAmount = new BigNumber(5);
+                const amounts = [valueMultiplier, valueMultiplier];
+                const nestedAssetData = [erc1155AssetData1, erc1155AssetData2];
+                const assetData = assetDataUtils.encodeMultiAssetData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    multiAssetAmount,
+                );
+                // execute transfer
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                // check balances
+                const totalValueTransferred = valuesToTransfer[0].times(valueMultiplier).times(multiAssetAmount);
+                const expectedFinalBalances = [
+                    // from
+                    expectedInitialBalances[0].minus(totalValueTransferred),
+                    // to
+                    expectedInitialBalances[1].plus(totalValueTransferred),
+                ];
+                await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+                await erc1155Wrapper2.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+            });
+            it('should successfully transfer a combination of ERC20, ERC721, and ERC1155 tokens', async () => {
+                // setup test parameters
+                const inputAmount = new BigNumber(1);
+                const erc20Amount = new BigNumber(10);
+                const erc20AssetData = assetDataUtils.encodeERC20AssetData(erc20TokenA.address);
+                const erc721Amount = new BigNumber(1);
+                const erc721AssetData = assetDataUtils.encodeERC721AssetData(erc721TokenA.address, erc721AFromTokenId);
+                const erc1155TokenHolders = [fromAddress, toAddress];
+                const erc1155TokensToTransfer = erc1155FungibleTokens.slice(0, 1);
+                const erc1155ValuesToTransfer = [new BigNumber(25)];
+                const erc1155Amount = new BigNumber(23);
+                const erc1155ReceiverCallbackData = '0x0102030405';
+                const erc1155AssetData = assetDataUtils.encodeERC1155AssetData(
+                    erc1155Contract.address,
+                    erc1155TokensToTransfer,
+                    erc1155ValuesToTransfer,
+                    erc1155ReceiverCallbackData,
+                );
+                const amounts = [erc20Amount, erc721Amount, erc1155Amount];
+                const nestedAssetData = [erc20AssetData, erc721AssetData, erc1155AssetData];
+                const assetData = assetDataUtils.encodeMultiAssetData(amounts, nestedAssetData);
+                const data = assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+                    assetData,
+                    fromAddress,
+                    toAddress,
+                    inputAmount,
+                );
+                // check balances before transfer
+                const erc20Balances = await erc20Wrapper.getBalancesAsync();
+                const ownerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(ownerFromAsset).to.be.equal(fromAddress);
+                const erc1155ExpectedInitialBalances = [
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                ];
+                await erc1155Wrapper.assertBalancesAsync(
+                    erc1155TokenHolders,
+                    erc1155TokensToTransfer,
+                    erc1155ExpectedInitialBalances,
+                );
+                // execute transfer
+                await web3Wrapper.awaitTransactionSuccessAsync(
+                    await web3Wrapper.sendTransactionAsync({
+                        to: multiAssetProxy.address,
+                        data,
+                        from: authorized,
+                        gas: 1000000,
+                    }),
+                    constants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                // check balances after transfer
+                const newBalances = await erc20Wrapper.getBalancesAsync();
+                const totalAmount = inputAmount.times(erc20Amount);
+                expect(newBalances[fromAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[fromAddress][erc20TokenA.address].minus(totalAmount),
+                );
+                expect(newBalances[toAddress][erc20TokenA.address]).to.be.bignumber.equal(
+                    erc20Balances[toAddress][erc20TokenA.address].plus(totalAmount),
+                );
+                const newOwnerFromAsset = await erc721TokenA.ownerOf.callAsync(erc721AFromTokenId);
+                expect(newOwnerFromAsset).to.be.equal(toAddress);
+                const erc1155TotalValueTransferred = erc1155ValuesToTransfer[0].times(erc1155Amount).times(inputAmount);
+                const expectedFinalBalances = [
+                    erc1155ExpectedInitialBalances[0].minus(erc1155TotalValueTransferred),
+                    erc1155ExpectedInitialBalances[1].plus(erc1155TotalValueTransferred),
+                ];
+                await erc1155Wrapper.assertBalancesAsync(
+                    erc1155TokenHolders,
+                    erc1155TokensToTransfer,
+                    expectedFinalBalances,
+                );
+            });
             it('should successfully transfer a combination of ERC20 and ERC721 tokens', async () => {
                 const inputAmount = new BigNumber(1);
                 const erc20Amount = new BigNumber(10);

contracts/asset-proxy/test/utils/erc1155_proxy_wrapper.ts

@@ -0,0 +1,382 @@
+import { artifacts as erc1155Artifacts, ERC1155MintableContract, Erc1155Wrapper } from '@0x/contracts-erc1155';
+import {
+    constants,
+    ERC1155FungibleHoldingsByOwner,
+    ERC1155HoldingsByOwner,
+    ERC1155NonFungibleHoldingsByOwner,
+    LogDecoder,
+    txDefaults,
+} from '@0x/contracts-test-utils';
+import { assetDataUtils } from '@0x/order-utils';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { artifacts, ERC1155ProxyContract, IAssetProxyContract } from '../../src';
+
+export class ERC1155ProxyWrapper {
+    private readonly _tokenOwnerAddresses: string[];
+    private readonly _fungibleTokenIds: string[];
+    private readonly _nonFungibleTokenIds: string[];
+    private readonly _nfts: Array<{ id: BigNumber; tokenId: BigNumber }>;
+    private readonly _contractOwnerAddress: string;
+    private readonly _web3Wrapper: Web3Wrapper;
+    private readonly _provider: Provider;
+    private readonly _logDecoder: LogDecoder;
+    private readonly _dummyTokenWrappers: Erc1155Wrapper[];
+    private readonly _assetProxyInterface: IAssetProxyContract;
+    private _proxyContract?: ERC1155ProxyContract;
+    private _proxyIdIfExists?: string;
+    private _initialTokenIdsByOwner: ERC1155HoldingsByOwner = { fungible: {}, nonFungible: {} };
+
+    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
+        this._web3Wrapper = new Web3Wrapper(provider);
+        this._provider = provider;
+        const allArtifacts = _.merge(artifacts, erc1155Artifacts);
+        this._logDecoder = new LogDecoder(this._web3Wrapper, allArtifacts);
+        this._dummyTokenWrappers = [];
+        this._assetProxyInterface = new IAssetProxyContract(
+            artifacts.IAssetProxy.compilerOutput.abi,
+            constants.NULL_ADDRESS,
+            provider,
+        );
+        this._tokenOwnerAddresses = tokenOwnerAddresses;
+        this._contractOwnerAddress = contractOwnerAddress;
+        this._fungibleTokenIds = [];
+        this._nonFungibleTokenIds = [];
+        this._nfts = [];
+    }
+    /**
+     * @dev Deploys dummy ERC1155 contracts
+     * @return An array of ERC1155 wrappers; one for each deployed contract.
+     */
+    public async deployDummyContractsAsync(): Promise<Erc1155Wrapper[]> {
+        // tslint:disable-next-line:no-unused-variable
+        for (const i of _.times(constants.NUM_DUMMY_ERC1155_CONTRACTS_TO_DEPLOY)) {
+            const erc1155Contract = await ERC1155MintableContract.deployFrom0xArtifactAsync(
+                erc1155Artifacts.ERC1155Mintable,
+                this._provider,
+                txDefaults,
+            );
+            const erc1155Wrapper = new Erc1155Wrapper(erc1155Contract, this._provider, this._contractOwnerAddress);
+            this._dummyTokenWrappers.push(erc1155Wrapper);
+        }
+        return this._dummyTokenWrappers;
+    }
+    /**
+     * @dev Deploys the ERC1155 proxy
+     * @return Deployed ERC1155 proxy contract instance
+     */
+    public async deployProxyAsync(): Promise<ERC1155ProxyContract> {
+        this._proxyContract = await ERC1155ProxyContract.deployFrom0xArtifactAsync(
+            artifacts.ERC1155Proxy,
+            this._provider,
+            txDefaults,
+        );
+        this._proxyIdIfExists = await this._proxyContract.getProxyId.callAsync();
+        return this._proxyContract;
+    }
+    /**
+     * @dev Gets the ERC1155 proxy id
+     */
+    public getProxyId(): string {
+        this._validateProxyContractExistsOrThrow();
+        return this._proxyIdIfExists as string;
+    }
+    /**
+     * @dev transfers erc1155 fungible/non-fungible tokens.
+     * @param from source address
+     * @param to destination address
+     * @param contractAddress address of erc155 contract
+     * @param tokensToTransfer array of erc1155 tokens to transfer
+     * @param valuesToTransfer array of corresponding values for each erc1155 token to transfer
+     * @param valueMultiplier each value in `valuesToTransfer` is multiplied by this
+     * @param receiverCallbackData callback data if `to` is a contract
+     * @param authorizedSender sender of `transferFrom` transaction
+     * @param extraData extra data to append to `transferFrom` transaction. Optional.
+     * @return tranasction hash.
+     */
+    public async transferFromAsync(
+        from: string,
+        to: string,
+        contractAddress: string,
+        tokensToTransfer: BigNumber[],
+        valuesToTransfer: BigNumber[],
+        valueMultiplier: BigNumber,
+        receiverCallbackData: string,
+        authorizedSender: string,
+        extraData?: string,
+    ): Promise<string> {
+        this._validateProxyContractExistsOrThrow();
+        let encodedAssetData = assetDataUtils.encodeERC1155AssetData(
+            contractAddress,
+            tokensToTransfer,
+            valuesToTransfer,
+            receiverCallbackData,
+        );
+        if (extraData !== undefined) {
+            encodedAssetData = `${encodedAssetData}${extraData}`;
+        }
+        const data = this._assetProxyInterface.transferFrom.getABIEncodedTransactionData(
+            encodedAssetData,
+            from,
+            to,
+            valueMultiplier,
+        );
+        const txHash = await this._web3Wrapper.sendTransactionAsync({
+            to: (this._proxyContract as ERC1155ProxyContract).address,
+            data,
+            from: authorizedSender,
+        });
+        return txHash;
+    }
+    /**
+     * @dev transfers erc1155 fungible/non-fungible tokens.
+     * @param from source address
+     * @param to destination address
+     * @param contractAddress address of erc155 contract
+     * @param tokensToTransfer array of erc1155 tokens to transfer
+     * @param valuesToTransfer array of corresponding values for each erc1155 token to transfer
+     * @param valueMultiplier each value in `valuesToTransfer` is multiplied by this
+     * @param receiverCallbackData callback data if `to` is a contract
+     * @param authorizedSender sender of `transferFrom` transaction
+     * @param extraData extra data to append to `transferFrom` transaction. Optional.
+     * @return tranasction receipt with decoded logs.
+     */
+    public async transferFromWithLogsAsync(
+        from: string,
+        to: string,
+        contractAddress: string,
+        tokensToTransfer: BigNumber[],
+        valuesToTransfer: BigNumber[],
+        valueMultiplier: BigNumber,
+        receiverCallbackData: string,
+        authorizedSender: string,
+        extraData?: string,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        const txReceipt = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this.transferFromAsync(
+                from,
+                to,
+                contractAddress,
+                tokensToTransfer,
+                valuesToTransfer,
+                valueMultiplier,
+                receiverCallbackData,
+                authorizedSender,
+                extraData,
+            ),
+        );
+        return txReceipt;
+    }
+    /**
+     * @dev For each deployed ERC1155 contract, this function mints a set of fungible/non-fungible
+     *      tokens for each token owner address (`_tokenOwnerAddresses`).
+     * @return Balances of each token owner, across all ERC1155 contracts and tokens.
+     */
+    public async setBalancesAndAllowancesAsync(): Promise<ERC1155HoldingsByOwner> {
+        this._validateDummyTokenContractsExistOrThrow();
+        this._validateProxyContractExistsOrThrow();
+        this._initialTokenIdsByOwner = {
+            fungible: {},
+            nonFungible: {},
+        };
+        const fungibleHoldingsByOwner: ERC1155FungibleHoldingsByOwner = {};
+        const nonFungibleHoldingsByOwner: ERC1155NonFungibleHoldingsByOwner = {};
+        // Set balances accordingly
+        for (const dummyWrapper of this._dummyTokenWrappers) {
+            const dummyAddress = dummyWrapper.getContract().address;
+            // tslint:disable-next-line:no-unused-variable
+            for (const i of _.times(constants.NUM_ERC1155_FUNGIBLE_TOKENS_MINT)) {
+                // Create a fungible token
+                const tokenId = await dummyWrapper.mintFungibleTokensAsync(
+                    this._tokenOwnerAddresses,
+                    constants.INITIAL_ERC1155_FUNGIBLE_BALANCE,
+                );
+                const tokenIdAsString = tokenId.toString();
+                this._fungibleTokenIds.push(tokenIdAsString);
+                // Mint tokens for each owner for this token
+                for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
+                    // tslint:disable-next-line:no-unused-variable
+                    if (fungibleHoldingsByOwner[tokenOwnerAddress] === undefined) {
+                        fungibleHoldingsByOwner[tokenOwnerAddress] = {};
+                    }
+                    if (fungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress] === undefined) {
+                        fungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress] = {};
+                    }
+                    fungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress][tokenIdAsString] =
+                        constants.INITIAL_ERC1155_FUNGIBLE_BALANCE;
+                    await dummyWrapper.setApprovalForAllAsync(
+                        tokenOwnerAddress,
+                        (this._proxyContract as ERC1155ProxyContract).address,
+                        true,
+                    );
+                }
+            }
+            // Non-fungible tokens
+            // tslint:disable-next-line:no-unused-variable
+            for (const j of _.times(constants.NUM_ERC1155_NONFUNGIBLE_TOKENS_MINT)) {
+                const [tokenId, nftIds] = await dummyWrapper.mintNonFungibleTokensAsync(this._tokenOwnerAddresses);
+                const tokenIdAsString = tokenId.toString();
+                this._nonFungibleTokenIds.push(tokenIdAsString);
+                _.each(this._tokenOwnerAddresses, async (tokenOwnerAddress: string, i: number) => {
+                    if (nonFungibleHoldingsByOwner[tokenOwnerAddress] === undefined) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress] = {};
+                    }
+                    if (nonFungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress] === undefined) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress] = {};
+                    }
+                    if (nonFungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress][tokenIdAsString] === undefined) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress][tokenIdAsString] = [];
+                    }
+                    this._nfts.push({ id: nftIds[i], tokenId });
+                    nonFungibleHoldingsByOwner[tokenOwnerAddress][dummyAddress][tokenIdAsString].push(nftIds[i]);
+                    await dummyWrapper.setApprovalForAllAsync(
+                        tokenOwnerAddress,
+                        (this._proxyContract as ERC1155ProxyContract).address,
+                        true,
+                    );
+                });
+            }
+        }
+        this._initialTokenIdsByOwner = {
+            fungible: fungibleHoldingsByOwner,
+            nonFungible: nonFungibleHoldingsByOwner,
+        };
+        return this._initialTokenIdsByOwner;
+    }
+    /**
+     * @dev For each deployed ERC1155 contract, this function quieries the set of fungible/non-fungible
+     *      tokens for each token owner address (`_tokenOwnerAddresses`).
+     * @return Balances of each token owner, across all ERC1155 contracts and tokens.
+     */
+    public async getBalancesAsync(): Promise<ERC1155HoldingsByOwner> {
+        this._validateDummyTokenContractsExistOrThrow();
+        this._validateBalancesAndAllowancesSetOrThrow();
+        const tokenHoldingsByOwner: ERC1155FungibleHoldingsByOwner = {};
+        const nonFungibleHoldingsByOwner: ERC1155NonFungibleHoldingsByOwner = {};
+        for (const dummyTokenWrapper of this._dummyTokenWrappers) {
+            const tokenContract = dummyTokenWrapper.getContract();
+            const tokenAddress = tokenContract.address;
+            // Construct batch balance call
+            const tokenOwners: string[] = [];
+            const tokenIds: BigNumber[] = [];
+            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
+                for (const tokenId of this._fungibleTokenIds) {
+                    tokenOwners.push(tokenOwnerAddress);
+                    tokenIds.push(new BigNumber(tokenId));
+                }
+                for (const nft of this._nfts) {
+                    tokenOwners.push(tokenOwnerAddress);
+                    tokenIds.push(nft.id);
+                }
+            }
+            const balances = await dummyTokenWrapper.getBalancesAsync(tokenOwners, tokenIds);
+            // Parse out balances into fungible / non-fungible token holdings
+            let i = 0;
+            for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
+                // Fungible tokens
+                for (const tokenId of this._fungibleTokenIds) {
+                    if (tokenHoldingsByOwner[tokenOwnerAddress] === undefined) {
+                        tokenHoldingsByOwner[tokenOwnerAddress] = {};
+                    }
+                    if (tokenHoldingsByOwner[tokenOwnerAddress][tokenAddress] === undefined) {
+                        tokenHoldingsByOwner[tokenOwnerAddress][tokenAddress] = {};
+                    }
+                    tokenHoldingsByOwner[tokenOwnerAddress][tokenAddress][tokenId] = balances[i++];
+                }
+                // Non-fungible tokens
+                for (const nft of this._nfts) {
+                    if (nonFungibleHoldingsByOwner[tokenOwnerAddress] === undefined) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress] = {};
+                    }
+                    if (nonFungibleHoldingsByOwner[tokenOwnerAddress][tokenAddress] === undefined) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][tokenAddress] = {};
+                    }
+                    if (
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][tokenAddress][nft.tokenId.toString()] ===
+                        undefined
+                    ) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][tokenAddress][nft.tokenId.toString()] = [];
+                    }
+                    const isOwner = balances[i++];
+                    if (isOwner.isEqualTo(1)) {
+                        nonFungibleHoldingsByOwner[tokenOwnerAddress][tokenAddress][nft.tokenId.toString()].push(
+                            nft.id,
+                        );
+                    }
+                }
+            }
+        }
+        const holdingsByOwner = {
+            fungible: tokenHoldingsByOwner,
+            nonFungible: nonFungibleHoldingsByOwner,
+        };
+        return holdingsByOwner;
+    }
+    /**
+     * @dev Checks if proxy is approved to transfer tokens on behalf of `userAddress`.
+     * @param userAddress owner of ERC1155 tokens.
+     * @param contractAddress address of ERC1155 contract.
+     * @return True iff the proxy is approved for all. False otherwise.
+     */
+    public async isProxyApprovedForAllAsync(userAddress: string, contractAddress: string): Promise<boolean> {
+        this._validateProxyContractExistsOrThrow();
+        const tokenContract = this._getContractFromAddress(contractAddress);
+        const operator = (this._proxyContract as ERC1155ProxyContract).address;
+        const didApproveAll = await tokenContract.isApprovedForAll.callAsync(userAddress, operator);
+        return didApproveAll;
+    }
+    public getFungibleTokenIds(): BigNumber[] {
+        const fungibleTokenIds = _.map(this._fungibleTokenIds, (tokenIdAsString: string) => {
+            return new BigNumber(tokenIdAsString);
+        });
+        return fungibleTokenIds;
+    }
+    public getNonFungibleTokenIds(): BigNumber[] {
+        const nonFungibleTokenIds = _.map(this._nonFungibleTokenIds, (tokenIdAsString: string) => {
+            return new BigNumber(tokenIdAsString);
+        });
+        return nonFungibleTokenIds;
+    }
+    public getTokenOwnerAddresses(): string[] {
+        return this._tokenOwnerAddresses;
+    }
+    public getContractWrapper(contractAddress: string): Erc1155Wrapper {
+        const tokenWrapper = _.find(this._dummyTokenWrappers, (wrapper: Erc1155Wrapper) => {
+            return wrapper.getContract().address === contractAddress;
+        });
+        if (tokenWrapper === undefined) {
+            throw new Error(`Contract: ${contractAddress} was not deployed through ERC1155ProxyWrapper`);
+        }
+        return tokenWrapper;
+    }
+    private _getContractFromAddress(tokenAddress: string): ERC1155MintableContract {
+        const tokenContractIfExists = _.find(this._dummyTokenWrappers, c => c.getContract().address === tokenAddress);
+        if (tokenContractIfExists === undefined) {
+            throw new Error(`Token: ${tokenAddress} was not deployed through ERC1155ProxyWrapper`);
+        }
+        return tokenContractIfExists.getContract();
+    }
+    private _validateDummyTokenContractsExistOrThrow(): void {
+        if (this._dummyTokenWrappers === undefined) {
+            throw new Error('Dummy ERC1155 tokens not yet deployed, please call "deployDummyTokensAsync"');
+        }
+    }
+    private _validateProxyContractExistsOrThrow(): void {
+        if (this._proxyContract === undefined) {
+            throw new Error('ERC1155 proxy contract not yet deployed, please call "deployProxyAsync"');
+        }
+    }
+    private _validateBalancesAndAllowancesSetOrThrow(): void {
+        if (
+            _.keys(this._initialTokenIdsByOwner.fungible).length === 0 ||
+            _.keys(this._initialTokenIdsByOwner.nonFungible).length === 0
+        ) {
+            throw new Error(
+                'Dummy ERC1155 balances and allowances not yet set, please call "setBalancesAndAllowancesAsync"',
+            );
+        }
+    }
+}

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

@@ -1,19 +1,16 @@
-import { artifacts as tokensArtifacts, DummyERC20TokenContract } from '@0x/contracts-erc20';
+import { artifacts as erc20Artifacts, DummyERC20TokenContract } from '@0x/contracts-erc20';
 import { constants, ERC20BalancesByOwner, txDefaults } from '@0x/contracts-test-utils';
 import { assetDataUtils } from '@0x/order-utils';
 import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
+import { ZeroExProvider } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { ERC20ProxyContract } from '../../generated-wrappers/erc20_proxy';
-import { artifacts } from '../../src/artifacts';
+import { artifacts, ERC20ProxyContract } from '../../src';
 
 export class ERC20Wrapper {
     private readonly _tokenOwnerAddresses: string[];
     private readonly _contractOwnerAddress: string;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
+    private readonly _provider: ZeroExProvider;
     private readonly _dummyTokenContracts: DummyERC20TokenContract[];
     private _proxyContract?: ERC20ProxyContract;
     private _proxyIdIfExists?: string;
@@ -24,9 +21,8 @@ export class ERC20Wrapper {
      * @param contractOwnerAddress Desired owner of the contract
      * Instance of ERC20Wrapper
      */
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
+    constructor(provider: ZeroExProvider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
         this._dummyTokenContracts = [];
-        this._web3Wrapper = new Web3Wrapper(provider);
         this._provider = provider;
         this._tokenOwnerAddresses = tokenOwnerAddresses;
         this._contractOwnerAddress = contractOwnerAddress;
@@ -38,7 +34,7 @@ export class ERC20Wrapper {
         for (let i = 0; i < numberToDeploy; i++) {
             this._dummyTokenContracts.push(
                 await DummyERC20TokenContract.deployFrom0xArtifactAsync(
-                    tokensArtifacts.DummyERC20Token,
+                    erc20Artifacts.DummyERC20Token,
                     this._provider,
                     txDefaults,
                     constants.DUMMY_TOKEN_NAME,
@@ -68,20 +64,16 @@ export class ERC20Wrapper {
         this._validateProxyContractExistsOrThrow();
         for (const dummyTokenContract of this._dummyTokenContracts) {
             for (const tokenOwnerAddress of this._tokenOwnerAddresses) {
-                await this._web3Wrapper.awaitTransactionSuccessAsync(
-                    await dummyTokenContract.setBalance.sendTransactionAsync(
-                        tokenOwnerAddress,
-                        constants.INITIAL_ERC20_BALANCE,
-                        { from: this._contractOwnerAddress },
-                    ),
+                await dummyTokenContract.setBalance.awaitTransactionSuccessAsync(
+                    tokenOwnerAddress,
+                    constants.INITIAL_ERC20_BALANCE,
+                    { from: this._contractOwnerAddress },
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
-                await this._web3Wrapper.awaitTransactionSuccessAsync(
-                    await dummyTokenContract.approve.sendTransactionAsync(
-                        (this._proxyContract as ERC20ProxyContract).address,
-                        constants.INITIAL_ERC20_ALLOWANCE,
-                        { from: tokenOwnerAddress },
-                    ),
+                await dummyTokenContract.approve.awaitTransactionSuccessAsync(
+                    (this._proxyContract as ERC20ProxyContract).address,
+                    constants.INITIAL_ERC20_ALLOWANCE,
+                    { from: tokenOwnerAddress },
                     constants.AWAIT_TRANSACTION_MINED_MS,
                 );
             }
@@ -94,10 +86,10 @@ export class ERC20Wrapper {
     }
     public async setBalanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(assetData);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.setBalance.sendTransactionAsync(userAddress, amount, {
-                from: this._contractOwnerAddress,
-            }),
+        await tokenContract.setBalance.awaitTransactionSuccessAsync(
+            userAddress,
+            amount,
+            { from: this._contractOwnerAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
@@ -110,10 +102,10 @@ export class ERC20Wrapper {
     public async setAllowanceAsync(userAddress: string, assetData: string, amount: BigNumber): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(assetData);
         const proxyAddress = (this._proxyContract as ERC20ProxyContract).address;
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.approve.sendTransactionAsync(proxyAddress, amount, {
-                from: userAddress,
-            }),
+        await tokenContract.approve.awaitTransactionSuccessAsync(
+            proxyAddress,
+            amount,
+            { from: userAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
@@ -134,7 +126,7 @@ export class ERC20Wrapper {
         _.forEach(balances, (balance, balanceIndex) => {
             const tokenAddress = balanceInfo[balanceIndex].tokenAddress;
             const tokenOwnerAddress = balanceInfo[balanceIndex].tokenOwnerAddress;
-            if (_.isUndefined(balancesByOwner[tokenOwnerAddress])) {
+            if (balancesByOwner[tokenOwnerAddress] === undefined) {
                 balancesByOwner[tokenOwnerAddress] = {};
             }
             const wrappedBalance = new BigNumber(balance);
@@ -143,7 +135,7 @@ export class ERC20Wrapper {
         return balancesByOwner;
     }
     public addDummyTokenContract(dummy: DummyERC20TokenContract): void {
-        if (!_.isUndefined(this._dummyTokenContracts)) {
+        if (this._dummyTokenContracts !== undefined) {
             this._dummyTokenContracts.push(dummy);
         }
     }
@@ -161,18 +153,18 @@ export class ERC20Wrapper {
         const erc20ProxyData = assetDataUtils.decodeERC20AssetData(assetData);
         const tokenAddress = erc20ProxyData.tokenAddress;
         const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
-        if (_.isUndefined(tokenContractIfExists)) {
+        if (tokenContractIfExists === undefined) {
             throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
         }
         return tokenContractIfExists;
     }
     private _validateDummyTokenContractsExistOrThrow(): void {
-        if (_.isUndefined(this._dummyTokenContracts)) {
+        if (this._dummyTokenContracts === undefined) {
             throw new Error('Dummy ERC20 tokens not yet deployed, please call "deployDummyTokensAsync"');
         }
     }
     private _validateProxyContractExistsOrThrow(): void {
-        if (_.isUndefined(this._proxyContract)) {
+        if (this._proxyContract === undefined) {
             throw new Error('ERC20 proxy contract not yet deployed, please call "deployProxyAsync"');
         }
     }

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

@@ -1,25 +1,21 @@
-import { artifacts as tokensArtifacts, DummyERC721TokenContract } from '@0x/contracts-erc721';
+import { artifacts as erc721Artifacts, DummyERC721TokenContract } from '@0x/contracts-erc721';
 import { constants, ERC721TokenIdsByOwner, txDefaults } from '@0x/contracts-test-utils';
 import { generatePseudoRandomSalt } from '@0x/order-utils';
 import { BigNumber } from '@0x/utils';
-import { Web3Wrapper } from '@0x/web3-wrapper';
-import { Provider } from 'ethereum-types';
+import { ZeroExProvider } from 'ethereum-types';
 import * as _ from 'lodash';
 
-import { ERC721ProxyContract } from '../../generated-wrappers/erc721_proxy';
-import { artifacts } from '../../src/artifacts';
+import { artifacts, ERC721ProxyContract } from '../../src';
 
 export class ERC721Wrapper {
     private readonly _tokenOwnerAddresses: string[];
     private readonly _contractOwnerAddress: string;
-    private readonly _web3Wrapper: Web3Wrapper;
-    private readonly _provider: Provider;
+    private readonly _provider: ZeroExProvider;
     private readonly _dummyTokenContracts: DummyERC721TokenContract[];
     private _proxyContract?: ERC721ProxyContract;
     private _proxyIdIfExists?: string;
     private _initialTokenIdsByOwner: ERC721TokenIdsByOwner = {};
-    constructor(provider: Provider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
-        this._web3Wrapper = new Web3Wrapper(provider);
+    constructor(provider: ZeroExProvider, tokenOwnerAddresses: string[], contractOwnerAddress: string) {
         this._provider = provider;
         this._dummyTokenContracts = [];
         this._tokenOwnerAddresses = tokenOwnerAddresses;
@@ -30,7 +26,7 @@ export class ERC721Wrapper {
         for (const i of _.times(constants.NUM_DUMMY_ERC721_TO_DEPLOY)) {
             this._dummyTokenContracts.push(
                 await DummyERC721TokenContract.deployFrom0xArtifactAsync(
-                    tokensArtifacts.DummyERC721Token,
+                    erc721Artifacts.DummyERC721Token,
                     this._provider,
                     txDefaults,
                     constants.DUMMY_TOKEN_NAME,
@@ -63,12 +59,12 @@ export class ERC721Wrapper {
                 for (const i of _.times(constants.NUM_ERC721_TOKENS_TO_MINT)) {
                     const tokenId = generatePseudoRandomSalt();
                     await this.mintAsync(dummyTokenContract.address, tokenId, tokenOwnerAddress);
-                    if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress])) {
+                    if (this._initialTokenIdsByOwner[tokenOwnerAddress] === undefined) {
                         this._initialTokenIdsByOwner[tokenOwnerAddress] = {
                             [dummyTokenContract.address]: [],
                         };
                     }
-                    if (_.isUndefined(this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address])) {
+                    if (this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address] === undefined) {
                         this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address] = [];
                     }
                     this._initialTokenIdsByOwner[tokenOwnerAddress][dummyTokenContract.address].push(tokenId);
@@ -92,20 +88,20 @@ export class ERC721Wrapper {
         const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
         const tokenOwner = await this.ownerOfAsync(tokenAddress, tokenId);
         const proxyAddress = (this._proxyContract as ERC721ProxyContract).address;
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.setApprovalForAll.sendTransactionAsync(proxyAddress, isApproved, {
-                from: tokenOwner,
-            }),
+        await tokenContract.setApprovalForAll.awaitTransactionSuccessAsync(
+            proxyAddress,
+            isApproved,
+            { from: tokenOwner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
     public async approveAsync(to: string, tokenAddress: string, tokenId: BigNumber): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
         const tokenOwner = await this.ownerOfAsync(tokenAddress, tokenId);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.approve.sendTransactionAsync(to, tokenId, {
-                from: tokenOwner,
-            }),
+        await tokenContract.approve.awaitTransactionSuccessAsync(
+            to,
+            tokenId,
+            { from: tokenOwner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
@@ -116,28 +112,29 @@ export class ERC721Wrapper {
         userAddress: string,
     ): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.transferFrom.sendTransactionAsync(currentOwner, userAddress, tokenId, {
-                from: currentOwner,
-            }),
+        await tokenContract.transferFrom.awaitTransactionSuccessAsync(
+            currentOwner,
+            userAddress,
+            tokenId,
+            { from: currentOwner },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
     public async mintAsync(tokenAddress: string, tokenId: BigNumber, userAddress: string): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.mint.sendTransactionAsync(userAddress, tokenId, {
-                from: this._contractOwnerAddress,
-            }),
+        await tokenContract.mint.awaitTransactionSuccessAsync(
+            userAddress,
+            tokenId,
+            { from: this._contractOwnerAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
     public async burnAsync(tokenAddress: string, tokenId: BigNumber, owner: string): Promise<void> {
         const tokenContract = this._getTokenContractFromAssetData(tokenAddress);
-        await this._web3Wrapper.awaitTransactionSuccessAsync(
-            await tokenContract.burn.sendTransactionAsync(owner, tokenId, {
-                from: this._contractOwnerAddress,
-            }),
+        await tokenContract.burn.awaitTransactionSuccessAsync(
+            owner,
+            tokenId,
+            { from: this._contractOwnerAddress },
             constants.AWAIT_TRANSACTION_MINED_MS,
         );
     }
@@ -190,12 +187,12 @@ export class ERC721Wrapper {
         _.forEach(tokenOwnerAddresses, (tokenOwnerAddress, ownerIndex) => {
             const tokenAddress = tokenInfo[ownerIndex].tokenAddress;
             const tokenId = tokenInfo[ownerIndex].tokenId;
-            if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress])) {
+            if (tokenIdsByOwner[tokenOwnerAddress] === undefined) {
                 tokenIdsByOwner[tokenOwnerAddress] = {
                     [tokenAddress]: [],
                 };
             }
-            if (_.isUndefined(tokenIdsByOwner[tokenOwnerAddress][tokenAddress])) {
+            if (tokenIdsByOwner[tokenOwnerAddress][tokenAddress] === undefined) {
                 tokenIdsByOwner[tokenOwnerAddress][tokenAddress] = [];
             }
             tokenIdsByOwner[tokenOwnerAddress][tokenAddress].push(tokenId);
@@ -211,18 +208,18 @@ export class ERC721Wrapper {
     }
     private _getTokenContractFromAssetData(tokenAddress: string): DummyERC721TokenContract {
         const tokenContractIfExists = _.find(this._dummyTokenContracts, c => c.address === tokenAddress);
-        if (_.isUndefined(tokenContractIfExists)) {
+        if (tokenContractIfExists === undefined) {
             throw new Error(`Token: ${tokenAddress} was not deployed through ERC20Wrapper`);
         }
         return tokenContractIfExists;
     }
     private _validateDummyTokenContractsExistOrThrow(): void {
-        if (_.isUndefined(this._dummyTokenContracts)) {
+        if (this._dummyTokenContracts === undefined) {
             throw new Error('Dummy ERC721 tokens not yet deployed, please call "deployDummyTokensAsync"');
         }
     }
     private _validateProxyContractExistsOrThrow(): void {
-        if (_.isUndefined(this._proxyContract)) {
+        if (this._proxyContract === undefined) {
             throw new Error('ERC721 proxy contract not yet deployed, please call "deployProxyAsync"');
         }
     }

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

@@ -1,2 +1,3 @@
 export * from './erc20_wrapper';
 export * from './erc721_wrapper';
+export * from './erc1155_proxy_wrapper';

contracts/asset-proxy/tsconfig.json

@@ -1,19 +1,17 @@
 {
     "extends": "../../tsconfig",
-    "compilerOptions": {
-        "outDir": "lib",
-        "rootDir": ".",
-        "resolveJsonModule": true
-    },
+    "compilerOptions": { "outDir": "lib", "rootDir": ".", "resolveJsonModule": true },
     "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
     "files": [
-        "./generated-artifacts/IAssetData.json",
-        "./generated-artifacts/IAssetProxy.json",
-        "./generated-artifacts/IAuthorizable.json",
-        "./generated-artifacts/ERC20Proxy.json",
-        "./generated-artifacts/ERC721Proxy.json",
-        "./generated-artifacts/MixinAuthorizable.json",
-        "./generated-artifacts/MultiAssetProxy.json"
+        "generated-artifacts/ERC1155Proxy.json",
+        "generated-artifacts/ERC20Proxy.json",
+        "generated-artifacts/ERC721Proxy.json",
+        "generated-artifacts/IAssetData.json",
+        "generated-artifacts/IAssetProxy.json",
+        "generated-artifacts/IAuthorizable.json",
+        "generated-artifacts/LibAssetData.json",
+        "generated-artifacts/MixinAuthorizable.json",
+        "generated-artifacts/MultiAssetProxy.json"
     ],
     "exclude": ["./deploy/solc/solc_bin"]
 }

contracts/coordinator/CHANGELOG.json

@@ -0,0 +1,83 @@
+[
+    {
+        "timestamp": 1558712885,
+        "version": "2.0.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557961111,
+        "version": "2.0.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557799313,
+        "version": "2.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557507213,
+        "version": "2.0.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "2.0.0",
+        "changes": [
+            {
+                "note": "Make `decodeOrdersFromFillData`, `getCoordinatorApprovalHash`, and `getTransactionHash` public",
+                "pr": 1729
+            },
+            {
+                "note": "Make `assertValidTransactionOrdersApproval` internal",
+                "pr": 1729
+            }
+        ],
+        "timestamp": 1554997931
+    },
+    {
+        "version": "1.1.0",
+        "changes": [
+            {
+                "note": "Run Web3ProviderEngine without excess block polling",
+                "pr": 1695
+            }
+        ],
+        "timestamp": 1553183790
+    },
+    {
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note": "Created Coordinator package"
+            },
+            {
+                "note": "Use separate EIP712 domains for transactions and approvals",
+                "pr": 1705
+            },
+            {
+                "note": "Add `SignatureType.Invalid`",
+                "pr": 1705
+            },
+            {
+                "note": "Set `evmVersion` to `constantinople`",
+                "pr": 1707
+            }
+        ],
+        "timestamp": 1553091633
+    }
+]

contracts/coordinator/CHANGELOG.md

@@ -0,0 +1,38 @@
+<!--
+changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v2.0.4 - _May 24, 2019_
+
+    * Dependencies updated
+
+## v2.0.3 - _May 15, 2019_
+
+    * Dependencies updated
+
+## v2.0.2 - _May 14, 2019_
+
+    * Dependencies updated
+
+## v2.0.1 - _May 10, 2019_
+
+    * Dependencies updated
+
+## v2.0.0 - _April 11, 2019_
+
+    * Make `decodeOrdersFromFillData`, `getCoordinatorApprovalHash`, and `getTransactionHash` public (#1729)
+    * Make `assertValidTransactionOrdersApproval` internal (#1729)
+
+## v1.1.0 - _March 21, 2019_
+
+    * Run Web3ProviderEngine without excess block polling (#1695)
+
+## v1.0.0 - _March 20, 2019_
+
+    * Created Coordinator package
+    * Use separate EIP712 domains for transactions and approvals (#1705)
+    * Add `SignatureType.Invalid` (#1705)
+    * Set `evmVersion` to `constantinople` (#1707)

contracts/coordinator/DEPLOYS.json

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

contracts/coordinator/README.md

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

contracts/coordinator/compiler.json

@@ -0,0 +1,25 @@
+{
+    "artifactsDir": "./generated-artifacts",
+    "contractsDir": "./contracts",
+    "useDockerisedSolc": false,
+    "compilerSettings": {
+        "evmVersion": "constantinople",
+        "optimizer": {
+            "enabled": true,
+            "runs": 1000000,
+            "details": { "yul": true, "deduplicate": true, "cse": true, "constantOptimizer": true }
+        },
+        "outputSelection": {
+            "*": {
+                "*": [
+                    "abi",
+                    "evm.bytecode.object",
+                    "evm.bytecode.sourceMap",
+                    "evm.deployedBytecode.object",
+                    "evm.deployedBytecode.sourceMap"
+                ]
+            }
+        }
+    },
+    "contracts": ["src/Coordinator.sol", "src/registry/CoordinatorRegistry.sol"]
+}

contracts/coordinator/contracts/src/Coordinator.sol

@@ -0,0 +1,39 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "./libs/LibConstants.sol";
+import "./MixinSignatureValidator.sol";
+import "./MixinCoordinatorApprovalVerifier.sol";
+import "./MixinCoordinatorCore.sol";
+
+
+// solhint-disable no-empty-blocks
+contract Coordinator is
+    LibConstants,
+    MixinSignatureValidator,
+    MixinCoordinatorApprovalVerifier,
+    MixinCoordinatorCore
+{
+    constructor (address _exchange)
+        public
+        LibConstants(_exchange)
+    {}
+}

contracts/coordinator/contracts/src/MixinCoordinatorApprovalVerifier.sol

@@ -0,0 +1,203 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibExchangeSelectors.sol";
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "@0x/contracts-utils/contracts/src/LibBytes.sol";
+import "@0x/contracts-utils/contracts/src/LibAddressArray.sol";
+import "./libs/LibCoordinatorApproval.sol";
+import "./libs/LibZeroExTransaction.sol";
+import "./mixins/MSignatureValidator.sol";
+import "./mixins/MCoordinatorApprovalVerifier.sol";
+
+
+// solhint-disable avoid-tx-origin
+contract MixinCoordinatorApprovalVerifier is
+    LibExchangeSelectors,
+    LibCoordinatorApproval,
+    LibZeroExTransaction,
+    MSignatureValidator,
+    MCoordinatorApprovalVerifier
+{
+    using LibBytes for bytes;
+    using LibAddressArray for address[];
+
+    /// @dev Validates that the 0x transaction has been approved by all of the feeRecipients
+    ///      that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function assertValidCoordinatorApprovals(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view
+    {
+        // Get the orders from the the Exchange calldata in the 0x transaction
+        LibOrder.Order[] memory orders = decodeOrdersFromFillData(transaction.data);
+
+        // No approval is required for non-fill methods
+        if (orders.length > 0) {
+            // Revert if approval is invalid for transaction orders
+            assertValidTransactionOrdersApproval(
+                transaction,
+                orders,
+                txOrigin,
+                transactionSignature,
+                approvalExpirationTimeSeconds,
+                approvalSignatures
+            );
+        }
+    }
+
+    /// @dev Decodes the orders from Exchange calldata representing any fill method.
+    /// @param data Exchange calldata representing a fill method.
+    /// @return The orders from the Exchange calldata.
+    function decodeOrdersFromFillData(bytes memory data)
+        public
+        pure
+        returns (LibOrder.Order[] memory orders)
+    {
+        bytes4 selector = data.readBytes4(0);
+        if (
+            selector == FILL_ORDER_SELECTOR ||
+            selector == FILL_ORDER_NO_THROW_SELECTOR ||
+            selector == FILL_OR_KILL_ORDER_SELECTOR
+        ) {
+            // Decode single order
+            (LibOrder.Order memory order) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order)
+            );
+            orders = new LibOrder.Order[](1);
+            orders[0] = order;
+        } else if (
+            selector == BATCH_FILL_ORDERS_SELECTOR ||
+            selector == BATCH_FILL_ORDERS_NO_THROW_SELECTOR ||
+            selector == BATCH_FILL_OR_KILL_ORDERS_SELECTOR ||
+            selector == MARKET_BUY_ORDERS_SELECTOR ||
+            selector == MARKET_BUY_ORDERS_NO_THROW_SELECTOR ||
+            selector == MARKET_SELL_ORDERS_SELECTOR ||
+            selector == MARKET_SELL_ORDERS_NO_THROW_SELECTOR
+        ) {
+            // Decode all orders
+            // solhint-disable indent
+            (orders) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order[])
+            );
+        } else if (selector == MATCH_ORDERS_SELECTOR) {
+            // Decode left and right orders
+            (LibOrder.Order memory leftOrder, LibOrder.Order memory rightOrder) = abi.decode(
+                data.slice(4, data.length),
+                (LibOrder.Order, LibOrder.Order)
+            );
+
+            // Create array of orders
+            orders = new LibOrder.Order[](2);
+            orders[0] = leftOrder;
+            orders[1] = rightOrder;
+        }
+        return orders;
+    }
+
+    /// @dev Validates that the feeRecipients of a batch of order have approved a 0x transaction.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param orders Array of order structs containing order specifications.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order.
+    function assertValidTransactionOrdersApproval(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        LibOrder.Order[] memory orders,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        internal
+        view
+    {
+        // Verify that Ethereum tx signer is the same as the approved txOrigin
+        require(
+            tx.origin == txOrigin,
+            "INVALID_ORIGIN"
+        );
+
+        // Hash 0x transaction
+        bytes32 transactionHash = getTransactionHash(transaction);
+
+        // Create empty list of approval signers
+        address[] memory approvalSignerAddresses = new address[](0);
+
+        uint256 signaturesLength = approvalSignatures.length;
+        for (uint256 i = 0; i != signaturesLength; i++) {
+            // Create approval message
+            uint256 currentApprovalExpirationTimeSeconds = approvalExpirationTimeSeconds[i];
+            CoordinatorApproval memory approval = CoordinatorApproval({
+                txOrigin: txOrigin,
+                transactionHash: transactionHash,
+                transactionSignature: transactionSignature,
+                approvalExpirationTimeSeconds: currentApprovalExpirationTimeSeconds
+            });
+
+            // Ensure approval has not expired
+            require(
+                // solhint-disable-next-line not-rely-on-time
+                currentApprovalExpirationTimeSeconds > block.timestamp,
+                "APPROVAL_EXPIRED"
+            );
+
+            // Hash approval message and recover signer address
+            bytes32 approvalHash = getCoordinatorApprovalHash(approval);
+            address approvalSignerAddress = getSignerAddress(approvalHash, approvalSignatures[i]);
+
+            // Add approval signer to list of signers
+            approvalSignerAddresses = approvalSignerAddresses.append(approvalSignerAddress);
+        }
+
+        // Ethereum transaction signer gives implicit signature of approval
+        approvalSignerAddresses = approvalSignerAddresses.append(tx.origin);
+
+        uint256 ordersLength = orders.length;
+        for (uint256 i = 0; i != ordersLength; i++) {
+            // Do not check approval if the order's senderAddress is null
+            if (orders[i].senderAddress == address(0)) {
+                continue;
+            }
+
+            // Ensure feeRecipient of order has approved this 0x transaction
+            address approverAddress = orders[i].feeRecipientAddress;
+            bool isOrderApproved = approvalSignerAddresses.contains(approverAddress);
+            require(
+                isOrderApproved,
+                "INVALID_APPROVAL_SIGNATURE"
+            );
+        }
+    }
+}

contracts/coordinator/contracts/src/MixinCoordinatorCore.sol

@@ -0,0 +1,65 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "./libs/LibZeroExTransaction.sol";
+import "./libs/LibConstants.sol";
+import "./mixins/MCoordinatorApprovalVerifier.sol";
+import "./interfaces/ICoordinatorCore.sol";
+
+
+contract MixinCoordinatorCore is
+    LibConstants,
+    MCoordinatorApprovalVerifier,
+    ICoordinatorCore
+{
+    /// @dev Executes a 0x transaction that has been signed by the feeRecipients that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function executeTransaction(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+    {
+        // Validate that the 0x transaction has been approves by each feeRecipient
+        assertValidCoordinatorApprovals(
+            transaction,
+            txOrigin,
+            transactionSignature,
+            approvalExpirationTimeSeconds,
+            approvalSignatures
+        );
+
+        // Execute the transaction
+        EXCHANGE.executeTransaction(
+            transaction.salt,
+            transaction.signerAddress,
+            transaction.data,
+            transactionSignature
+        );
+    }
+}

contracts/coordinator/contracts/src/MixinSignatureValidator.sol

@@ -0,0 +1,118 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "@0x/contracts-utils/contracts/src/LibBytes.sol";
+import "./mixins/MSignatureValidator.sol";
+
+
+contract MixinSignatureValidator is
+    MSignatureValidator
+{
+    using LibBytes for bytes;
+
+    /// @dev Recovers the address of a signer given a hash and signature.
+    /// @param hash Any 32 byte hash.
+    /// @param signature Proof that the hash has been signed by signer.
+    function getSignerAddress(bytes32 hash, bytes memory signature)
+        public
+        pure
+        returns (address signerAddress)
+    {
+        require(
+            signature.length > 0,
+            "LENGTH_GREATER_THAN_0_REQUIRED"
+        );
+
+        // Pop last byte off of signature byte array.
+        uint8 signatureTypeRaw = uint8(signature.popLastByte());
+
+        // Ensure signature is supported
+        require(
+            signatureTypeRaw < uint8(SignatureType.NSignatureTypes),
+            "SIGNATURE_UNSUPPORTED"
+        );
+
+        SignatureType signatureType = SignatureType(signatureTypeRaw);
+
+        // Always illegal signature.
+        // This is always an implicit option since a signer can create a
+        // signature array with invalid type or length. We may as well make
+        // it an explicit option. This aids testing and analysis. It is
+        // also the initialization value for the enum type.
+        if (signatureType == SignatureType.Illegal) {
+            revert("SIGNATURE_ILLEGAL");
+
+        // Always invalid signature.
+        // Like Illegal, this is always implicitly available and therefore
+        // offered explicitly. It can be implicitly created by providing
+        // a correctly formatted but incorrect signature.
+        } else if (signatureType == SignatureType.Invalid) {
+            require(
+                signature.length == 0,
+                "LENGTH_0_REQUIRED"
+            );
+            revert("SIGNATURE_INVALID");
+
+        // Signature using EIP712
+        } else if (signatureType == SignatureType.EIP712) {
+            require(
+                signature.length == 65,
+                "LENGTH_65_REQUIRED"
+            );
+            uint8 v = uint8(signature[0]);
+            bytes32 r = signature.readBytes32(1);
+            bytes32 s = signature.readBytes32(33);
+            signerAddress = ecrecover(
+                hash,
+                v,
+                r,
+                s
+            );
+            return signerAddress;
+
+        // Signed using web3.eth_sign
+        } else if (signatureType == SignatureType.EthSign) {
+            require(
+                signature.length == 65,
+                "LENGTH_65_REQUIRED"
+            );
+            uint8 v = uint8(signature[0]);
+            bytes32 r = signature.readBytes32(1);
+            bytes32 s = signature.readBytes32(33);
+            signerAddress = ecrecover(
+                keccak256(abi.encodePacked(
+                    "\x19Ethereum Signed Message:\n32",
+                    hash
+                )),
+                v,
+                r,
+                s
+            );
+            return signerAddress;
+        }
+
+        // Anything else is illegal (We do not return false because
+        // the signature may actually be valid, just not in a format
+        // that we currently support. In this case returning false
+        // may lead the caller to incorrectly believe that the
+        // signature was invalid.)
+        revert("SIGNATURE_UNSUPPORTED");
+    }
+}

contracts/coordinator/contracts/src/interfaces/ICoordinatorApprovalVerifier.sol

@@ -0,0 +1,52 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "../libs/LibZeroExTransaction.sol";
+
+
+contract ICoordinatorApprovalVerifier {
+
+    /// @dev Validates that the 0x transaction has been approved by all of the feeRecipients
+    ///      that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function assertValidCoordinatorApprovals(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public
+        view;
+
+    /// @dev Decodes the orders from Exchange calldata representing any fill method.
+    /// @param data Exchange calldata representing a fill method.
+    /// @return The orders from the Exchange calldata.
+    function decodeOrdersFromFillData(bytes memory data)
+        public
+        pure
+        returns (LibOrder.Order[] memory orders);
+}

contracts/coordinator/contracts/src/interfaces/ICoordinatorCore.sol

@@ -0,0 +1,41 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "../libs/LibZeroExTransaction.sol";
+
+
+contract ICoordinatorCore {
+
+    /// @dev Executes a 0x transaction that has been signed by the feeRecipients that correspond to each order in the transaction's Exchange calldata.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order in the transaction's Exchange calldata.
+    function executeTransaction(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        public;
+}

contracts/coordinator/contracts/src/interfaces/ISignatureValidator.sol

@@ -0,0 +1,31 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+
+contract ISignatureValidator {
+
+    /// @dev Recovers the address of a signer given a hash and signature.
+    /// @param hash Any 32 byte hash.
+    /// @param signature Proof that the hash has been signed by signer.
+    function getSignerAddress(bytes32 hash, bytes memory signature)
+        public
+        pure
+        returns (address signerAddress);
+}

contracts/coordinator/contracts/src/interfaces/ITransactions.sol

@@ -0,0 +1,35 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+pragma solidity ^0.5.5;
+
+
+contract ITransactions {
+
+    /// @dev Executes an exchange method call in the context of signer.
+    /// @param salt Arbitrary number to ensure uniqueness of transaction hash.
+    /// @param signerAddress Address of transaction signer.
+    /// @param data AbiV2 encoded calldata.
+    /// @param signature Proof of signer transaction by signer.
+    function executeTransaction(
+        uint256 salt,
+        address signerAddress,
+        bytes calldata data,
+        bytes calldata signature
+    )
+        external;
+}

contracts/coordinator/contracts/src/libs/LibConstants.sol

@@ -0,0 +1,34 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "../interfaces/ITransactions.sol";
+
+
+contract LibConstants {
+
+     // solhint-disable-next-line var-name-mixedcase
+    ITransactions internal EXCHANGE;
+
+    constructor (address _exchange)
+        public
+    {
+        EXCHANGE = ITransactions(_exchange);
+    }
+}

contracts/coordinator/contracts/src/libs/LibCoordinatorApproval.sol

@@ -0,0 +1,98 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "./LibEIP712Domain.sol";
+
+
+contract LibCoordinatorApproval is
+    LibEIP712Domain
+{
+    // Hash for the EIP712 Coordinator approval message
+    // keccak256(abi.encodePacked(
+    //     "CoordinatorApproval(",
+    //     "address txOrigin,",
+    //     "bytes32 transactionHash,",
+    //     "bytes transactionSignature,",
+    //     "uint256 approvalExpirationTimeSeconds",
+    //     ")"
+    // ));
+    bytes32 constant internal EIP712_COORDINATOR_APPROVAL_SCHEMA_HASH = 0x2fbcdbaa76bc7589916958ae919dfbef04d23f6bbf26de6ff317b32c6cc01e05;
+
+    struct CoordinatorApproval {
+        address txOrigin;                       // Required signer of Ethereum transaction that is submitting approval.
+        bytes32 transactionHash;                // EIP712 hash of the transaction.
+        bytes transactionSignature;             // Signature of the 0x transaction.
+        uint256 approvalExpirationTimeSeconds;  // Timestamp in seconds for which the approval expires.
+    }
+
+    /// @dev Calculated the EIP712 hash of the Coordinator approval mesasage using the domain separator of this contract.
+    /// @param approval Coordinator approval message containing the transaction hash, transaction signature, and expiration of the approval.
+    /// @return EIP712 hash of the Coordinator approval message with the domain separator of this contract.
+    function getCoordinatorApprovalHash(CoordinatorApproval memory approval)
+        public
+        view
+        returns (bytes32 approvalHash)
+    {
+        approvalHash = hashEIP712CoordinatorMessage(hashCoordinatorApproval(approval));
+        return approvalHash;
+    }
+
+    /// @dev Calculated the EIP712 hash of the Coordinator approval mesasage with no domain separator.
+    /// @param approval Coordinator approval message containing the transaction hash, transaction signature, and expiration of the approval.
+    /// @return EIP712 hash of the Coordinator approval message with no domain separator.
+    function hashCoordinatorApproval(CoordinatorApproval memory approval)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = EIP712_COORDINATOR_APPROVAL_SCHEMA_HASH;
+        bytes memory transactionSignature = approval.transactionSignature;
+        address txOrigin = approval.txOrigin;
+        bytes32 transactionHash = approval.transactionHash;
+        uint256 approvalExpirationTimeSeconds = approval.approvalExpirationTimeSeconds;
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encodePacked(
+        //     EIP712_COORDINATOR_APPROVAL_SCHEMA_HASH,
+        //     approval.txOrigin,
+        //     approval.transactionHash,
+        //     keccak256(approval.transactionSignature)
+        //     approval.approvalExpirationTimeSeconds,
+        // ));
+
+        assembly {
+            // Compute hash of transaction signature
+            let transactionSignatureHash := keccak256(add(transactionSignature, 32), mload(transactionSignature))
+
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, schemaHash)                               // hash of schema
+            mstore(add(memPtr, 32), txOrigin)                        // txOrigin
+            mstore(add(memPtr, 64), transactionHash)                 // transactionHash
+            mstore(add(memPtr, 96), transactionSignatureHash)        // transactionSignatureHash
+            mstore(add(memPtr, 128), approvalExpirationTimeSeconds)  // approvalExpirationTimeSeconds
+            // Compute hash
+            result := keccak256(memPtr, 160)
+        }
+        return result;
+    }
+}

contracts/coordinator/contracts/src/libs/LibEIP712Domain.sol

@@ -0,0 +1,131 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./LibConstants.sol";
+
+
+contract LibEIP712Domain is
+    LibConstants
+{
+
+    // EIP191 header for EIP712 prefix
+    string constant internal EIP191_HEADER = "\x19\x01";
+
+    // EIP712 Domain Name value for the Coordinator
+    string constant internal EIP712_COORDINATOR_DOMAIN_NAME = "0x Protocol Coordinator";
+
+    // EIP712 Domain Version value for the Coordinator
+    string constant internal EIP712_COORDINATOR_DOMAIN_VERSION = "1.0.0";
+
+    // EIP712 Domain Name value for the Exchange
+    string constant internal EIP712_EXCHANGE_DOMAIN_NAME = "0x Protocol";
+
+    // EIP712 Domain Version value for the Exchange
+    string constant internal EIP712_EXCHANGE_DOMAIN_VERSION = "2";
+
+    // Hash of the EIP712 Domain Separator Schema
+    bytes32 constant internal EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH = keccak256(abi.encodePacked(
+        "EIP712Domain(",
+        "string name,",
+        "string version,",
+        "address verifyingContract",
+        ")"
+    ));
+
+    // Hash of the EIP712 Domain Separator data for the Coordinator
+    // solhint-disable-next-line var-name-mixedcase
+    bytes32 public EIP712_COORDINATOR_DOMAIN_HASH;
+
+    // Hash of the EIP712 Domain Separator data for the Exchange
+    // solhint-disable-next-line var-name-mixedcase
+    bytes32 public EIP712_EXCHANGE_DOMAIN_HASH;
+
+    constructor ()
+        public
+    {
+        EIP712_COORDINATOR_DOMAIN_HASH = keccak256(abi.encodePacked(
+            EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
+            keccak256(bytes(EIP712_COORDINATOR_DOMAIN_NAME)),
+            keccak256(bytes(EIP712_COORDINATOR_DOMAIN_VERSION)),
+            uint256(address(this))
+        ));
+
+        EIP712_EXCHANGE_DOMAIN_HASH = keccak256(abi.encodePacked(
+            EIP712_DOMAIN_SEPARATOR_SCHEMA_HASH,
+            keccak256(bytes(EIP712_EXCHANGE_DOMAIN_NAME)),
+            keccak256(bytes(EIP712_EXCHANGE_DOMAIN_VERSION)),
+            uint256(address(EXCHANGE))
+        ));
+    }
+
+    /// @dev Calculates EIP712 encoding for a hash struct in the EIP712 domain
+    ///      of this contract.
+    /// @param hashStruct The EIP712 hash struct.
+    /// @return EIP712 hash applied to this EIP712 Domain.
+    function hashEIP712CoordinatorMessage(bytes32 hashStruct)
+        internal
+        view
+        returns (bytes32 result)
+    {
+        return hashEIP712Message(EIP712_COORDINATOR_DOMAIN_HASH, hashStruct);
+    }
+
+    /// @dev Calculates EIP712 encoding for a hash struct in the EIP712 domain
+    ///      of the Exchange contract.
+    /// @param hashStruct The EIP712 hash struct.
+    /// @return EIP712 hash applied to the Exchange EIP712 Domain.
+    function hashEIP712ExchangeMessage(bytes32 hashStruct)
+        internal
+        view
+        returns (bytes32 result)
+    {
+        return hashEIP712Message(EIP712_EXCHANGE_DOMAIN_HASH, hashStruct);
+    }
+
+    /// @dev Calculates EIP712 encoding for a hash struct with a given domain hash.
+    /// @param eip712DomainHash Hash of the domain domain separator data.
+    /// @param hashStruct The EIP712 hash struct.
+    /// @return EIP712 hash applied to the Exchange EIP712 Domain.
+    function hashEIP712Message(bytes32 eip712DomainHash, bytes32 hashStruct)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        // Assembly for more efficient computing:
+        // keccak256(abi.encodePacked(
+        //     EIP191_HEADER,
+        //     EIP712_DOMAIN_HASH,
+        //     hashStruct
+        // ));
+
+        assembly {
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, 0x1901000000000000000000000000000000000000000000000000000000000000)  // EIP191 header
+            mstore(add(memPtr, 2), eip712DomainHash)                                            // EIP712 domain hash
+            mstore(add(memPtr, 34), hashStruct)                                                 // Hash of struct
+
+            // Compute hash
+            result := keccak256(memPtr, 66)
+        }
+        return result;
+    }
+}

contracts/coordinator/contracts/src/libs/LibZeroExTransaction.sol

@@ -0,0 +1,95 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "./LibEIP712Domain.sol";
+
+
+contract LibZeroExTransaction is
+    LibEIP712Domain
+{
+    // Hash for the EIP712 0x transaction schema
+    // keccak256(abi.encodePacked(
+    //    "ZeroExTransaction(",
+    //    "uint256 salt,",
+    //    "address signerAddress,",
+    //    "bytes data",
+    //    ")"
+    // ));
+    bytes32 constant internal EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH = 0x213c6f636f3ea94e701c0adf9b2624aa45a6c694f9a292c094f9a81c24b5df4c;
+
+    struct ZeroExTransaction {
+        uint256 salt;           // Arbitrary number to ensure uniqueness of transaction hash.
+        address signerAddress;  // Address of transaction signer.
+        bytes data;             // AbiV2 encoded calldata.
+    }
+
+    /// @dev Calculates the EIP712 hash of a 0x transaction using the domain separator of the Exchange contract.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @return EIP712 hash of the transaction with the domain separator of this contract.
+    function getTransactionHash(ZeroExTransaction memory transaction)
+        public
+        view
+        returns (bytes32 transactionHash)
+    {
+        // Hash the transaction with the domain separator of the Exchange contract.
+        transactionHash = hashEIP712ExchangeMessage(hashZeroExTransaction(transaction));
+        return transactionHash;
+    }
+
+    /// @dev Calculates EIP712 hash of the 0x transaction with no domain separator.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @return EIP712 hash of the transaction with no domain separator.
+    function hashZeroExTransaction(ZeroExTransaction memory transaction)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH;
+        bytes memory data = transaction.data;
+        uint256 salt = transaction.salt;
+        address signerAddress = transaction.signerAddress;
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encodePacked(
+        //     EIP712_ZEROEX_TRANSACTION_SCHEMA_HASH,
+        //     transaction.salt,
+        //     uint256(transaction.signerAddress),
+        //     keccak256(transaction.data)
+        // ));
+
+        assembly {
+            // Compute hash of data
+            let dataHash := keccak256(add(data, 32), mload(data))
+
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, schemaHash)                                                               // hash of schema
+            mstore(add(memPtr, 32), salt)                                                            // salt
+            mstore(add(memPtr, 64), and(signerAddress, 0xffffffffffffffffffffffffffffffffffffffff))  // signerAddress
+            mstore(add(memPtr, 96), dataHash)                                                        // hash of data
+
+            // Compute hash
+            result := keccak256(memPtr, 128)
+        }
+        return result;
+    }
+}

contracts/coordinator/contracts/src/mixins/MCoordinatorApprovalVerifier.sol

@@ -0,0 +1,46 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+pragma experimental "ABIEncoderV2";
+
+import "@0x/contracts-exchange-libs/contracts/src/LibOrder.sol";
+import "../interfaces/ICoordinatorApprovalVerifier.sol";
+
+
+contract MCoordinatorApprovalVerifier is
+    ICoordinatorApprovalVerifier
+{
+    /// @dev Validates that the feeRecipients of a batch of order have approved a 0x transaction.
+    /// @param transaction 0x transaction containing salt, signerAddress, and data.
+    /// @param orders Array of order structs containing order specifications.
+    /// @param txOrigin Required signer of Ethereum transaction calling this function.
+    /// @param transactionSignature Proof that the transaction has been signed by the signer.
+    /// @param approvalExpirationTimeSeconds Array of expiration times in seconds for which each corresponding approval signature expires.
+    /// @param approvalSignatures Array of signatures that correspond to the feeRecipients of each order.
+    function assertValidTransactionOrdersApproval(
+        LibZeroExTransaction.ZeroExTransaction memory transaction,
+        LibOrder.Order[] memory orders,
+        address txOrigin,
+        bytes memory transactionSignature,
+        uint256[] memory approvalExpirationTimeSeconds,
+        bytes[] memory approvalSignatures
+    )
+        internal
+        view;
+}

contracts/coordinator/contracts/src/mixins/MSignatureValidator.sol

@@ -0,0 +1,35 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "../interfaces/ISignatureValidator.sol";
+
+
+contract MSignatureValidator is
+    ISignatureValidator
+{
+    // Allowed signature types.
+    enum SignatureType {
+        Illegal,         // 0x00, default value
+        Invalid,         // 0x01
+        EIP712,          // 0x02
+        EthSign,         // 0x03
+        NSignatureTypes  // 0x04, number of signature types. Always leave at end.
+    }
+}

contracts/coordinator/contracts/src/registry/CoordinatorRegistry.sol

@@ -0,0 +1,32 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./MixinCoordinatorRegistryCore.sol";
+
+
+// solhint-disable no-empty-blocks
+contract CoordinatorRegistry is
+    MixinCoordinatorRegistryCore
+{
+    constructor ()
+        public
+        MixinCoordinatorRegistryCore()
+    {}
+}

contracts/coordinator/contracts/src/registry/MixinCoordinatorRegistryCore.sol

@@ -0,0 +1,48 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./interfaces/ICoordinatorRegistryCore.sol";
+
+
+// solhint-disable no-empty-blocks
+contract MixinCoordinatorRegistryCore is
+    ICoordinatorRegistryCore
+{
+    // mapping from `coordinatorOperator` -> `coordinatorEndpoint`
+    mapping (address => string) internal coordinatorEndpoints;
+
+    /// @dev Called by a Coordinator operator to set the endpoint of their Coordinator.
+    /// @param coordinatorEndpoint endpoint of the Coordinator.
+    function setCoordinatorEndpoint(string calldata coordinatorEndpoint) external {
+        address coordinatorOperator = msg.sender;
+        coordinatorEndpoints[coordinatorOperator] = coordinatorEndpoint;
+        emit CoordinatorEndpointSet(coordinatorOperator, coordinatorEndpoint);
+    }
+
+    /// @dev Gets the endpoint for a Coordinator.
+    /// @param coordinatorOperator operator of the Coordinator endpoint.
+    function getCoordinatorEndpoint(address coordinatorOperator)
+        external
+        view
+        returns (string memory coordinatorEndpoint)
+    {
+        return coordinatorEndpoints[coordinatorOperator];
+    }
+}

contracts/coordinator/contracts/src/registry/interfaces/ICoordinatorRegistryCore.sol

@@ -0,0 +1,41 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+
+// solhint-disable no-empty-blocks
+contract ICoordinatorRegistryCore
+{
+    /// @dev Emitted when a Coordinator endpoint is set.
+    event CoordinatorEndpointSet(
+        address coordinatorOperator,
+        string coordinatorEndpoint
+    );
+
+    /// @dev Called by a Coordinator operator to set the endpoint of their Coordinator.
+    /// @param coordinatorEndpoint endpoint of the Coordinator.
+    function setCoordinatorEndpoint(string calldata coordinatorEndpoint) external;
+
+    /// @dev Gets the endpoint for a Coordinator.
+    /// @param coordinatorOperator operator of the Coordinator endpoint.
+    function getCoordinatorEndpoint(address coordinatorOperator)
+        external
+        view
+        returns (string memory coordinatorEndpoint);
+}

contracts/coordinator/package.json

@@ -0,0 +1,89 @@
+{
+    "name": "@0x/contracts-coordinator",
+    "version": "2.0.4",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Smart contract extensions of 0x protocol",
+    "main": "lib/src/index.js",
+    "directories": {
+        "test": "test"
+    },
+    "scripts": {
+        "build": "yarn pre_build && tsc -b",
+        "build:ci": "yarn build",
+        "pre_build": "run-s compile generate_contract_wrappers",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
+        "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
+        "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
+        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
+        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
+        "compile": "sol-compiler",
+        "watch": "sol-compiler -w",
+        "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
+        "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
+        "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "fix": "tslint --fix --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "coverage:report:text": "istanbul report text",
+        "coverage:report:html": "istanbul report html && open coverage/index.html",
+        "profiler:report:html": "istanbul report html && open coverage/index.html",
+        "coverage:report:lcov": "istanbul report lcov",
+        "test:circleci": "yarn test",
+        "contracts:gen": "contracts-gen",
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "./generated-artifacts/@(Coordinator|CoordinatorRegistry).json",
+        "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "license": "Apache-2.0",
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
+    "devDependencies": {
+        "@0x/abi-gen": "^2.0.10",
+        "@0x/contracts-gen": "^1.0.9",
+        "@0x/contracts-test-utils": "^3.1.7",
+        "@0x/dev-utils": "^2.2.3",
+        "@0x/sol-compiler": "^3.1.8",
+        "@0x/tslint-config": "^3.0.1",
+        "@types/lodash": "4.14.104",
+        "@types/node": "*",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^3.0.0",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.1.0",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "solhint": "^1.4.1",
+        "tslint": "5.11.0",
+        "typescript": "3.0.1"
+    },
+    "dependencies": {
+        "@0x/base-contract": "^5.1.0",
+        "@0x/contracts-asset-proxy": "^2.1.5",
+        "@0x/contracts-erc20": "^2.2.5",
+        "@0x/contracts-exchange": "1.0.2",
+        "@0x/contracts-exchange-libs": "^2.1.6",
+        "@0x/contracts-utils": "^3.1.6",
+        "@0x/order-utils": "^8.1.1",
+        "@0x/types": "^2.2.2",
+        "@0x/typescript-typings": "^4.2.2",
+        "@0x/utils": "^4.3.3",
+        "@0x/web3-wrapper": "^6.0.6",
+        "ethereum-types": "^2.1.2",
+        "ethereumjs-util": "^5.1.1",
+        "lodash": "^4.17.11"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}

contracts/coordinator/src/artifacts.ts

@@ -0,0 +1,13 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+import { ContractArtifact } from 'ethereum-types';
+
+import * as Coordinator from '../generated-artifacts/Coordinator.json';
+import * as CoordinatorRegistry from '../generated-artifacts/CoordinatorRegistry.json';
+export const artifacts = {
+    Coordinator: Coordinator as ContractArtifact,
+    CoordinatorRegistry: CoordinatorRegistry as ContractArtifact,
+};

contracts/coordinator/src/index.ts

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

contracts/coordinator/src/wrappers.ts

@@ -0,0 +1,7 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+export * from '../generated-wrappers/coordinator';
+export * from '../generated-wrappers/coordinator_registry';

contracts/coordinator/test/coordinator.ts

@@ -0,0 +1,521 @@
+import { ERC20ProxyContract, ERC20Wrapper } from '@0x/contracts-asset-proxy';
+import { DummyERC20TokenContract } from '@0x/contracts-erc20';
+import {
+    artifacts as exchangeArtifacts,
+    ExchangeCancelEventArgs,
+    ExchangeCancelUpToEventArgs,
+    ExchangeContract,
+    ExchangeFillEventArgs,
+} from '@0x/contracts-exchange';
+import {
+    chaiSetup,
+    constants as devConstants,
+    expectTransactionFailedAsync,
+    getLatestBlockTimestampAsync,
+    OrderFactory,
+    provider,
+    TransactionFactory,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { assetDataUtils, orderHashUtils } from '@0x/order-utils';
+import { RevertReason, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+
+import { ApprovalFactory, artifacts, constants, CoordinatorContract, exchangeDataEncoder } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+web3Wrapper.abiDecoder.addABI(exchangeArtifacts.Exchange.compilerOutput.abi);
+// tslint:disable:no-unnecessary-type-assertion
+describe('Coordinator tests', () => {
+    let makerAddress: string;
+    let owner: string;
+    let takerAddress: string;
+    let feeRecipientAddress: string;
+
+    let erc20Proxy: ERC20ProxyContract;
+    let erc20TokenA: DummyERC20TokenContract;
+    let erc20TokenB: DummyERC20TokenContract;
+    let zrxToken: DummyERC20TokenContract;
+    let coordinatorContract: CoordinatorContract;
+    let exchange: ExchangeContract;
+
+    let erc20Wrapper: ERC20Wrapper;
+    let orderFactory: OrderFactory;
+    let takerTransactionFactory: TransactionFactory;
+    let makerTransactionFactory: TransactionFactory;
+    let approvalFactory: ApprovalFactory;
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        const usedAddresses = ([owner, makerAddress, takerAddress, feeRecipientAddress] = accounts.slice(0, 4));
+
+        erc20Wrapper = new ERC20Wrapper(provider, usedAddresses, owner);
+        erc20Proxy = await erc20Wrapper.deployProxyAsync();
+        const numDummyErc20ToDeploy = 3;
+        [erc20TokenA, erc20TokenB, zrxToken] = await erc20Wrapper.deployDummyTokensAsync(
+            numDummyErc20ToDeploy,
+            devConstants.DUMMY_TOKEN_DECIMALS,
+        );
+        await erc20Wrapper.setBalancesAndAllowancesAsync();
+
+        exchange = await ExchangeContract.deployFrom0xArtifactAsync(
+            exchangeArtifacts.Exchange,
+            provider,
+            txDefaults,
+            assetDataUtils.encodeERC20AssetData(zrxToken.address),
+        );
+
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await erc20Proxy.addAuthorizedAddress.sendTransactionAsync(exchange.address, { from: owner }),
+            devConstants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await exchange.registerAssetProxy.sendTransactionAsync(erc20Proxy.address, { from: owner }),
+            devConstants.AWAIT_TRANSACTION_MINED_MS,
+        );
+
+        coordinatorContract = await CoordinatorContract.deployFrom0xArtifactAsync(
+            artifacts.Coordinator,
+            provider,
+            txDefaults,
+            exchange.address,
+        );
+
+        // Configure order defaults
+        const defaultOrderParams = {
+            ...devConstants.STATIC_ORDER_PARAMS,
+            exchangeAddress: exchange.address,
+            senderAddress: coordinatorContract.address,
+            makerAddress,
+            feeRecipientAddress,
+            makerAssetData: assetDataUtils.encodeERC20AssetData(erc20TokenA.address),
+            takerAssetData: assetDataUtils.encodeERC20AssetData(erc20TokenB.address),
+        };
+        const makerPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(makerAddress)];
+        const takerPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(takerAddress)];
+        const feeRecipientPrivateKey = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(feeRecipientAddress)];
+        orderFactory = new OrderFactory(makerPrivateKey, defaultOrderParams);
+        makerTransactionFactory = new TransactionFactory(makerPrivateKey, exchange.address);
+        takerTransactionFactory = new TransactionFactory(takerPrivateKey, exchange.address);
+        approvalFactory = new ApprovalFactory(feeRecipientPrivateKey, coordinatorContract.address);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('single order fills', () => {
+        for (const fnName of constants.SINGLE_FILL_FN_NAMES) {
+            it(`${fnName} should fill the order with a signed approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(1);
+                const fillLogArgs = (fillLogs[0] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                expect(fillLogArgs.senderAddress).to.eq(coordinatorContract.address);
+                expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(fillLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+                expect(fillLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+                expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(orders[0].makerAssetAmount);
+                expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(orders[0].takerAssetAmount);
+                expect(fillLogArgs.makerFeePaid).to.bignumber.eq(orders[0].makerFee);
+                expect(fillLogArgs.takerFeePaid).to.bignumber.eq(orders[0].takerFee);
+                expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+            });
+            it(`${fnName} should fill the order if called by approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        feeRecipientAddress,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: feeRecipientAddress },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(1);
+                const fillLogArgs = (fillLogs[0] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                expect(fillLogArgs.senderAddress).to.eq(coordinatorContract.address);
+                expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(fillLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+                expect(fillLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+                expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(orders[0].makerAssetAmount);
+                expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(orders[0].takerAssetAmount);
+                expect(fillLogArgs.makerFeePaid).to.bignumber.eq(orders[0].makerFee);
+                expect(fillLogArgs.takerFeePaid).to.bignumber.eq(orders[0].takerFee);
+                expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+            });
+            it(`${fnName} should revert with no approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [],
+                        [],
+                        {
+                            from: takerAddress,
+                            gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS,
+                        },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an invalid approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an expired approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`${fnName} should revert if not called by tx signer or approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: owner },
+                    ),
+                    RevertReason.InvalidOrigin,
+                );
+            });
+        }
+    });
+    describe('batch order fills', () => {
+        for (const fnName of [...constants.MARKET_FILL_FN_NAMES, ...constants.BATCH_FILL_FN_NAMES]) {
+            it(`${fnName} should fill the orders with a signed approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress, gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(orders.length);
+                orders.forEach((order, index) => {
+                    const fillLogArgs = (fillLogs[index] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                    expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                    expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                    expect(fillLogArgs.senderAddress).to.eq(coordinatorContract.address);
+                    expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                    expect(fillLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                    expect(fillLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                    expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(order.makerAssetAmount);
+                    expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(order.takerAssetAmount);
+                    expect(fillLogArgs.makerFeePaid).to.bignumber.eq(order.makerFee);
+                    expect(fillLogArgs.takerFeePaid).to.bignumber.eq(order.takerFee);
+                    expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+                });
+            });
+            it(`${fnName} should fill the orders if called by approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                    await coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        feeRecipientAddress,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: feeRecipientAddress, gas: devConstants.MAX_EXECUTE_TRANSACTION_GAS },
+                    ),
+                    devConstants.AWAIT_TRANSACTION_MINED_MS,
+                );
+                const fillLogs = transactionReceipt.logs.filter(
+                    log => (log as LogWithDecodedArgs<ExchangeFillEventArgs>).event === 'Fill',
+                );
+                expect(fillLogs.length).to.eq(orders.length);
+                orders.forEach((order, index) => {
+                    const fillLogArgs = (fillLogs[index] as LogWithDecodedArgs<ExchangeFillEventArgs>).args;
+                    expect(fillLogArgs.makerAddress).to.eq(makerAddress);
+                    expect(fillLogArgs.takerAddress).to.eq(takerAddress);
+                    expect(fillLogArgs.senderAddress).to.eq(coordinatorContract.address);
+                    expect(fillLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                    expect(fillLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                    expect(fillLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                    expect(fillLogArgs.makerAssetFilledAmount).to.bignumber.eq(order.makerAssetAmount);
+                    expect(fillLogArgs.takerAssetFilledAmount).to.bignumber.eq(order.takerAssetAmount);
+                    expect(fillLogArgs.makerFeePaid).to.bignumber.eq(order.makerFee);
+                    expect(fillLogArgs.takerFeePaid).to.bignumber.eq(order.takerFee);
+                    expect(fillLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+                });
+            });
+            it(`${fnName} should revert with an invalid approval signature`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`${fnName} should revert with an expired approval`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: takerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`${fnName} should revert if not called by tx signer or approver`, async () => {
+                const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = takerTransactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory.newSignedApproval(
+                    transaction,
+                    takerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await expectTransactionFailedAsync(
+                    coordinatorContract.executeTransaction.sendTransactionAsync(
+                        transaction,
+                        takerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: owner },
+                    ),
+                    RevertReason.InvalidOrigin,
+                );
+            });
+        }
+    });
+    describe('cancels', () => {
+        it('cancelOrder call should be successful without an approval', async () => {
+            const orders = [await orderFactory.newSignedOrderAsync()];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDER, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await coordinatorContract.executeTransaction.sendTransactionAsync(
+                    transaction,
+                    makerAddress,
+                    transaction.signature,
+                    [],
+                    [],
+                    {
+                        from: makerAddress,
+                    },
+                ),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelEventArgs>).event === 'Cancel',
+            );
+            expect(cancelLogs.length).to.eq(1);
+            const cancelLogArgs = (cancelLogs[0] as LogWithDecodedArgs<ExchangeCancelEventArgs>).args;
+            expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+            expect(cancelLogArgs.senderAddress).to.eq(coordinatorContract.address);
+            expect(cancelLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+            expect(cancelLogArgs.makerAssetData).to.eq(orders[0].makerAssetData);
+            expect(cancelLogArgs.takerAssetData).to.eq(orders[0].takerAssetData);
+            expect(cancelLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(orders[0]));
+        });
+        it('batchCancelOrders call should be successful without an approval', async () => {
+            const orders = [await orderFactory.newSignedOrderAsync(), await orderFactory.newSignedOrderAsync()];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.BATCH_CANCEL_ORDERS, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await coordinatorContract.executeTransaction.sendTransactionAsync(
+                    transaction,
+                    makerAddress,
+                    transaction.signature,
+                    [],
+                    [],
+                    {
+                        from: makerAddress,
+                    },
+                ),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelEventArgs>).event === 'Cancel',
+            );
+            expect(cancelLogs.length).to.eq(orders.length);
+            orders.forEach((order, index) => {
+                const cancelLogArgs = (cancelLogs[index] as LogWithDecodedArgs<ExchangeCancelEventArgs>).args;
+                expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+                expect(cancelLogArgs.senderAddress).to.eq(coordinatorContract.address);
+                expect(cancelLogArgs.feeRecipientAddress).to.eq(feeRecipientAddress);
+                expect(cancelLogArgs.makerAssetData).to.eq(order.makerAssetData);
+                expect(cancelLogArgs.takerAssetData).to.eq(order.takerAssetData);
+                expect(cancelLogArgs.orderHash).to.eq(orderHashUtils.getOrderHashHex(order));
+            });
+        });
+        it('cancelOrdersUpTo call should be successful without an approval', async () => {
+            const orders: SignedOrder[] = [];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS_UP_TO, orders);
+            const transaction = makerTransactionFactory.newSignedTransaction(data);
+            const transactionReceipt = await web3Wrapper.awaitTransactionSuccessAsync(
+                await coordinatorContract.executeTransaction.sendTransactionAsync(
+                    transaction,
+                    makerAddress,
+                    transaction.signature,
+                    [],
+                    [],
+                    {
+                        from: makerAddress,
+                    },
+                ),
+            );
+            const cancelLogs = transactionReceipt.logs.filter(
+                log => (log as LogWithDecodedArgs<ExchangeCancelUpToEventArgs>).event === 'CancelUpTo',
+            );
+            expect(cancelLogs.length).to.eq(1);
+            const cancelLogArgs = (cancelLogs[0] as LogWithDecodedArgs<ExchangeCancelUpToEventArgs>).args;
+            expect(cancelLogArgs.makerAddress).to.eq(makerAddress);
+            expect(cancelLogArgs.senderAddress).to.eq(coordinatorContract.address);
+            expect(cancelLogArgs.orderEpoch).to.bignumber.eq(new BigNumber(1));
+        });
+    });
+});
+// tslint:disable:max-file-line-count

contracts/coordinator/test/coordinator_registry.ts

@@ -0,0 +1,81 @@
+import { artifacts as exchangeArtifacts } from '@0x/contracts-exchange';
+import { chaiSetup, provider, web3Wrapper } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+
+import { CoordinatorRegistryCoordinatorEndpointSetEventArgs } from '../src';
+
+import { CoordinatorRegistryWrapper } from './utils/coordinator_registry_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+web3Wrapper.abiDecoder.addABI(exchangeArtifacts.Exchange.compilerOutput.abi);
+// tslint:disable:no-unnecessary-type-assertion
+describe('Coordinator Registry tests', () => {
+    let coordinatorOperator: string;
+    const coordinatorEndpoint = 'http://sometec.0x.org';
+    const nilCoordinatorEndpoint = '';
+    let coordinatorRegistryWrapper: CoordinatorRegistryWrapper;
+    // tests
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        // setup accounts (skip owner)
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        [, coordinatorOperator] = accounts;
+        // deploy coordinator registry
+        coordinatorRegistryWrapper = new CoordinatorRegistryWrapper(provider);
+        await coordinatorRegistryWrapper.deployCoordinatorRegistryAsync();
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('core', () => {
+        it('Should successfully set a Coordinator endpoint', async () => {
+            await coordinatorRegistryWrapper.setCoordinatorEndpointAsync(coordinatorOperator, coordinatorEndpoint);
+            const recordedCoordinatorEndpoint = await coordinatorRegistryWrapper.getCoordinatorEndpointAsync(
+                coordinatorOperator,
+            );
+            expect(recordedCoordinatorEndpoint).to.be.equal(coordinatorEndpoint);
+        });
+        it('Should successfully unset a Coordinator endpoint', async () => {
+            // set Coordinator endpoint
+            await coordinatorRegistryWrapper.setCoordinatorEndpointAsync(coordinatorOperator, coordinatorEndpoint);
+            let recordedCoordinatorEndpoint = await coordinatorRegistryWrapper.getCoordinatorEndpointAsync(
+                coordinatorOperator,
+            );
+            expect(recordedCoordinatorEndpoint).to.be.equal(coordinatorEndpoint);
+            // unset Coordinator endpoint
+            await coordinatorRegistryWrapper.setCoordinatorEndpointAsync(coordinatorOperator, nilCoordinatorEndpoint);
+            recordedCoordinatorEndpoint = await coordinatorRegistryWrapper.getCoordinatorEndpointAsync(
+                coordinatorOperator,
+            );
+            expect(recordedCoordinatorEndpoint).to.be.equal(nilCoordinatorEndpoint);
+        });
+        it('Should emit an event when setting Coordinator endpoint', async () => {
+            // set Coordinator endpoint
+            const txReceipt = await coordinatorRegistryWrapper.setCoordinatorEndpointAsync(
+                coordinatorOperator,
+                coordinatorEndpoint,
+            );
+            const recordedCoordinatorEndpoint = await coordinatorRegistryWrapper.getCoordinatorEndpointAsync(
+                coordinatorOperator,
+            );
+            expect(recordedCoordinatorEndpoint).to.be.equal(coordinatorEndpoint);
+            // validate event
+            expect(txReceipt.logs.length).to.be.equal(1);
+            const log = txReceipt.logs[0] as LogWithDecodedArgs<CoordinatorRegistryCoordinatorEndpointSetEventArgs>;
+            expect(log.args.coordinatorOperator).to.be.equal(coordinatorOperator);
+            expect(log.args.coordinatorEndpoint).to.be.equal(coordinatorEndpoint);
+        });
+    });
+});

contracts/coordinator/test/global_hooks.ts

@@ -0,0 +1,19 @@
+import { env, EnvVars } from '@0x/dev-utils';
+
+import { coverage, profiler, provider } from '@0x/contracts-test-utils';
+import { providerUtils } from '@0x/utils';
+
+before('start web3 provider', () => {
+    providerUtils.startProviderEngine(provider);
+});
+after('generate coverage report', async () => {
+    if (env.parseBoolean(EnvVars.SolidityCoverage)) {
+        const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
+        await coverageSubprovider.writeCoverageAsync();
+    }
+    if (env.parseBoolean(EnvVars.SolidityProfiler)) {
+        const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+        await profilerSubprovider.writeProfilerOutputAsync();
+    }
+    provider.stop();
+});

contracts/coordinator/test/libs.ts

@@ -0,0 +1,79 @@
+import { addressUtils, chaiSetup, constants, provider, txDefaults, web3Wrapper } from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { transactionHashUtils } from '@0x/order-utils';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+
+import { artifacts, CoordinatorContract, hashUtils } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Libs tests', () => {
+    let coordinatorContract: CoordinatorContract;
+    const exchangeAddress = addressUtils.generatePseudoRandomAddress();
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        coordinatorContract = await CoordinatorContract.deployFrom0xArtifactAsync(
+            artifacts.Coordinator,
+            provider,
+            txDefaults,
+            exchangeAddress,
+        );
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('getTransactionHash', () => {
+        it('should return the correct transaction hash', async () => {
+            const tx = {
+                verifyingContractAddress: exchangeAddress,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+            };
+            const expectedTxHash = transactionHashUtils.getTransactionHashHex(tx);
+            const txHash = await coordinatorContract.getTransactionHash.callAsync(tx);
+            expect(expectedTxHash).to.eq(txHash);
+        });
+    });
+
+    describe('getApprovalHash', () => {
+        it('should return the correct approval hash', async () => {
+            const signedTx = {
+                verifyingContractAddress: exchangeAddress,
+                salt: new BigNumber(0),
+                signerAddress: constants.NULL_ADDRESS,
+                data: '0x1234',
+                signature: '0x5678',
+            };
+            const approvalExpirationTimeSeconds = new BigNumber(0);
+            const txOrigin = constants.NULL_ADDRESS;
+            const approval = {
+                txOrigin,
+                transactionHash: transactionHashUtils.getTransactionHashHex(signedTx),
+                transactionSignature: signedTx.signature,
+                approvalExpirationTimeSeconds,
+            };
+            const expectedApprovalHash = hashUtils.getApprovalHashHex(
+                signedTx,
+                coordinatorContract.address,
+                txOrigin,
+                approvalExpirationTimeSeconds,
+            );
+            const approvalHash = await coordinatorContract.getCoordinatorApprovalHash.callAsync(approval);
+            expect(expectedApprovalHash).to.eq(approvalHash);
+        });
+    });
+});

contracts/coordinator/test/mixins.ts

@@ -0,0 +1,728 @@
+import {
+    addressUtils,
+    chaiSetup,
+    constants as devConstants,
+    expectContractCallFailedAsync,
+    getLatestBlockTimestampAsync,
+    provider,
+    TransactionFactory,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { transactionHashUtils } from '@0x/order-utils';
+import { RevertReason, SignatureType, SignedOrder } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import * as ethUtil from 'ethereumjs-util';
+
+import { ApprovalFactory, artifacts, constants, CoordinatorContract, exchangeDataEncoder } from '../src';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+
+describe('Mixins tests', () => {
+    let transactionSignerAddress: string;
+    let approvalSignerAddress1: string;
+    let approvalSignerAddress2: string;
+    let mixins: CoordinatorContract;
+    let transactionFactory: TransactionFactory;
+    let approvalFactory1: ApprovalFactory;
+    let approvalFactory2: ApprovalFactory;
+    let defaultOrder: SignedOrder;
+    const exchangeAddress = addressUtils.generatePseudoRandomAddress();
+
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        mixins = await CoordinatorContract.deployFrom0xArtifactAsync(
+            artifacts.Coordinator,
+            provider,
+            txDefaults,
+            exchangeAddress,
+        );
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        [transactionSignerAddress, approvalSignerAddress1, approvalSignerAddress2] = accounts.slice(0, 3);
+        defaultOrder = {
+            exchangeAddress: devConstants.NULL_ADDRESS,
+            makerAddress: devConstants.NULL_ADDRESS,
+            takerAddress: devConstants.NULL_ADDRESS,
+            senderAddress: mixins.address,
+            feeRecipientAddress: approvalSignerAddress1,
+            makerAssetData: devConstants.NULL_BYTES,
+            takerAssetData: devConstants.NULL_BYTES,
+            makerAssetAmount: devConstants.ZERO_AMOUNT,
+            takerAssetAmount: devConstants.ZERO_AMOUNT,
+            makerFee: devConstants.ZERO_AMOUNT,
+            takerFee: devConstants.ZERO_AMOUNT,
+            expirationTimeSeconds: devConstants.ZERO_AMOUNT,
+            salt: devConstants.ZERO_AMOUNT,
+            signature: devConstants.NULL_BYTES,
+        };
+        const transactionSignerPrivateKey =
+            devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(transactionSignerAddress)];
+        const approvalSignerPrivateKey1 = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(approvalSignerAddress1)];
+        const approvalSignerPrivateKey2 = devConstants.TESTRPC_PRIVATE_KEYS[accounts.indexOf(approvalSignerAddress2)];
+        transactionFactory = new TransactionFactory(transactionSignerPrivateKey, exchangeAddress);
+        approvalFactory1 = new ApprovalFactory(approvalSignerPrivateKey1, mixins.address);
+        approvalFactory2 = new ApprovalFactory(approvalSignerPrivateKey2, mixins.address);
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+
+    describe('getSignerAddress', () => {
+        it('should return the correct address using the EthSign signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTransaction(data, SignatureType.EthSign);
+            const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
+            const signerAddress = await mixins.getSignerAddress.callAsync(transactionHash, transaction.signature);
+            expect(transaction.signerAddress).to.eq(signerAddress);
+        });
+        it('should return the correct address using the EIP712 signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTransaction(data, SignatureType.EIP712);
+            const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
+            const signerAddress = await mixins.getSignerAddress.callAsync(transactionHash, transaction.signature);
+            expect(transaction.signerAddress).to.eq(signerAddress);
+        });
+        it('should revert with with the Illegal signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTransaction(data);
+            const illegalSignatureByte = ethUtil.toBuffer(SignatureType.Illegal).toString('hex');
+            transaction.signature = `${transaction.signature.slice(
+                0,
+                transaction.signature.length - 2,
+            )}${illegalSignatureByte}`;
+            const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
+            expectContractCallFailedAsync(
+                mixins.getSignerAddress.callAsync(transactionHash, transaction.signature),
+                RevertReason.SignatureIllegal,
+            );
+        });
+        it('should revert with with the Invalid signature type', async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTransaction(data);
+            const invalidSignatureByte = ethUtil.toBuffer(SignatureType.Invalid).toString('hex');
+            transaction.signature = `0x${invalidSignatureByte}`;
+            const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
+            expectContractCallFailedAsync(
+                mixins.getSignerAddress.callAsync(transactionHash, transaction.signature),
+                RevertReason.SignatureInvalid,
+            );
+        });
+        it("should revert with with a signature type that doesn't exist", async () => {
+            const data = devConstants.NULL_BYTES;
+            const transaction = transactionFactory.newSignedTransaction(data);
+            const invalidSignatureByte = '04';
+            transaction.signature = `${transaction.signature.slice(
+                0,
+                transaction.signature.length - 2,
+            )}${invalidSignatureByte}`;
+            const transactionHash = transactionHashUtils.getTransactionHashHex(transaction);
+            expectContractCallFailedAsync(
+                mixins.getSignerAddress.callAsync(transactionHash, transaction.signature),
+                RevertReason.SignatureUnsupported,
+            );
+        });
+    });
+
+    describe('decodeOrdersFromFillData', () => {
+        for (const fnName of constants.SINGLE_FILL_FN_NAMES) {
+            it(`should correctly decode the orders for ${fnName} data`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const decodedOrders = await mixins.decodeOrdersFromFillData.callAsync(data);
+                const decodedSignedOrders = decodedOrders.map(order => ({
+                    ...order,
+                    exchangeAddress: devConstants.NULL_ADDRESS,
+                    signature: devConstants.NULL_BYTES,
+                }));
+                expect(orders).to.deep.eq(decodedSignedOrders);
+            });
+        }
+        for (const fnName of constants.BATCH_FILL_FN_NAMES) {
+            it(`should correctly decode the orders for ${fnName} data`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const decodedOrders = await mixins.decodeOrdersFromFillData.callAsync(data);
+                const decodedSignedOrders = decodedOrders.map(order => ({
+                    ...order,
+                    exchangeAddress: devConstants.NULL_ADDRESS,
+                    signature: devConstants.NULL_BYTES,
+                }));
+                expect(orders).to.deep.eq(decodedSignedOrders);
+            });
+        }
+        for (const fnName of constants.MARKET_FILL_FN_NAMES) {
+            it(`should correctly decode the orders for ${fnName} data`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const decodedOrders = await mixins.decodeOrdersFromFillData.callAsync(data);
+                const decodedSignedOrders = decodedOrders.map(order => ({
+                    ...order,
+                    exchangeAddress: devConstants.NULL_ADDRESS,
+                    signature: devConstants.NULL_BYTES,
+                }));
+                expect(orders).to.deep.eq(decodedSignedOrders);
+            });
+        }
+        for (const fnName of [constants.CANCEL_ORDER, constants.BATCH_CANCEL_ORDERS, constants.CANCEL_ORDERS_UP_TO]) {
+            it(`should correctly decode the orders for ${fnName} data`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const decodedOrders = await mixins.decodeOrdersFromFillData.callAsync(data);
+                const emptyArray: any[] = [];
+                expect(emptyArray).to.deep.eq(decodedOrders);
+            });
+        }
+        it('should decode an empty array for invalid data', async () => {
+            const data = '0x0123456789';
+            const decodedOrders = await mixins.decodeOrdersFromFillData.callAsync(data);
+            const emptyArray: any[] = [];
+            expect(emptyArray).to.deep.eq(decodedOrders);
+        });
+        it('should revert if data is less than 4 bytes long', async () => {
+            const data = '0x010203';
+            await expectContractCallFailedAsync(
+                mixins.decodeOrdersFromFillData.callAsync(data),
+                RevertReason.LibBytesGreaterOrEqualTo4LengthRequired,
+            );
+        });
+    });
+
+    describe('Single order approvals', () => {
+        for (const fnName of constants.SINGLE_FILL_FN_NAMES) {
+            it(`Should be successful: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=tx_signer, senderAddress=[null], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const order = {
+                    ...defaultOrder,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                };
+                const orders = [order];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    approvalSignerAddress1,
+                    transaction.signature,
+                    [],
+                    [],
+                    {
+                        from: approvalSignerAddress1,
+                    },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[approver1], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    approvalSignerAddress1,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: approvalSignerAddress1 },
+                );
+            });
+            it(`Should be successful: function=${fnName}, caller=approver1, senderAddress=[verifier], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    approvalSignerAddress1,
+                    transaction.signature,
+                    [],
+                    [],
+                    {
+                        from: approvalSignerAddress1,
+                    },
+                );
+            });
+            it(`Should revert: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName}, caller=tx_signer, senderAddress=[verifier], approval_sig=[approver1], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName}, caller=approver2, senderAddress=[verifier], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidOrigin,
+                );
+            });
+        }
+    });
+    describe('Batch order approvals', () => {
+        for (const fnName of [
+            ...constants.BATCH_FILL_FN_NAMES,
+            ...constants.MARKET_FILL_FN_NAMES,
+            constants.MATCH_ORDERS,
+        ]) {
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[null,null], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder].map(order => ({
+                    ...order,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                }));
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[null,null], feeRecipient=[approver1,approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder].map(order => ({
+                    ...order,
+                    senderAddress: devConstants.NULL_ADDRESS,
+                }));
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,null], feeRecipient=[approver1,approver1], approval_sig=[approver1], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, senderAddress: devConstants.NULL_ADDRESS }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds],
+                    [approval.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver2], approval_sig=[approver1,approver2], expiration=[valid,valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    transactionSignerAddress,
+                    transaction.signature,
+                    [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                    [approval1.signature, approval2.signature],
+                    { from: transactionSignerAddress },
+                );
+            });
+            it(`Should be successful: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                await mixins.assertValidCoordinatorApprovals.callAsync(
+                    transaction,
+                    approvalSignerAddress1,
+                    transaction.signature,
+                    [],
+                    [],
+                    { from: approvalSignerAddress1 },
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1,approver2], approval_sig=[approver2], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval2.signature],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.InvalidOrigin,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[], expiration=[]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [],
+                        [],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const signature = `${approval.signature.slice(0, 4)}FFFFFFFF${approval.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid,invalid], expiration=[valid,valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const approvalSignature2 = `${approval2.signature.slice(0, 4)}FFFFFFFF${approval2.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds, approvalExpirationTimeSeconds],
+                        [approval1.signature, approvalSignature2],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[invalid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                const approvalSignature2 = `${approval2.signature.slice(0, 4)}FFFFFFFF${approval2.signature.slice(12)}`;
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        approvalSignerAddress1,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approvalSignature2],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.InvalidApprovalSignature,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=tx_signer, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid,valid], expiration=[valid,invalid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds1 = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approvalExpirationTimeSeconds2 = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds1,
+                );
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds2,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds1, approvalExpirationTimeSeconds2],
+                        [approval1.signature, approval2.signature],
+                        { from: transactionSignerAddress },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver1, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver2], approval_sig=[valid], expiration=[invalid]`, async () => {
+                const orders = [defaultOrder, { ...defaultOrder, feeRecipientAddress: approvalSignerAddress2 }];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).minus(constants.TIME_BUFFER);
+                const approval2 = approvalFactory2.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        approvalSignerAddress1,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval2.signature],
+                        { from: approvalSignerAddress1 },
+                    ),
+                    RevertReason.ApprovalExpired,
+                );
+            });
+            it(`Should revert: function=${fnName} caller=approver2, senderAddress=[verifier,verifier], feeRecipient=[approver1, approver1], approval_sig=[valid], expiration=[valid]`, async () => {
+                const orders = [defaultOrder, defaultOrder];
+                const data = exchangeDataEncoder.encodeOrdersToExchangeData(fnName, orders);
+                const transaction = transactionFactory.newSignedTransaction(data);
+                const currentTimestamp = await getLatestBlockTimestampAsync();
+                const approvalExpirationTimeSeconds = new BigNumber(currentTimestamp).plus(constants.TIME_BUFFER);
+                const approval1 = approvalFactory1.newSignedApproval(
+                    transaction,
+                    transactionSignerAddress,
+                    approvalExpirationTimeSeconds,
+                );
+                expectContractCallFailedAsync(
+                    mixins.assertValidCoordinatorApprovals.callAsync(
+                        transaction,
+                        transactionSignerAddress,
+                        transaction.signature,
+                        [approvalExpirationTimeSeconds],
+                        [approval1.signature],
+                        { from: approvalSignerAddress2 },
+                    ),
+                    RevertReason.InvalidOrigin,
+                );
+            });
+        }
+    });
+    describe('cancels', () => {
+        it('should allow the tx signer to call `cancelOrder` without approval', async () => {
+            const orders = [defaultOrder];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDER, orders);
+            const transaction = transactionFactory.newSignedTransaction(data);
+            await mixins.assertValidCoordinatorApprovals.callAsync(
+                transaction,
+                transactionSignerAddress,
+                transaction.signature,
+                [],
+                [],
+                { from: transactionSignerAddress },
+            );
+        });
+        it('should allow the tx signer to call `batchCancelOrders` without approval', async () => {
+            const orders = [defaultOrder, defaultOrder];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.BATCH_CANCEL_ORDERS, orders);
+            const transaction = transactionFactory.newSignedTransaction(data);
+            await mixins.assertValidCoordinatorApprovals.callAsync(
+                transaction,
+                transactionSignerAddress,
+                transaction.signature,
+                [],
+                [],
+                { from: transactionSignerAddress },
+            );
+        });
+        it('should allow the tx signer to call `cancelOrdersUpTo` without approval', async () => {
+            const orders: SignedOrder[] = [];
+            const data = exchangeDataEncoder.encodeOrdersToExchangeData(constants.CANCEL_ORDERS_UP_TO, orders);
+            const transaction = transactionFactory.newSignedTransaction(data);
+            await mixins.assertValidCoordinatorApprovals.callAsync(
+                transaction,
+                transactionSignerAddress,
+                transaction.signature,
+                [],
+                [],
+                { from: transactionSignerAddress },
+            );
+        });
+    });
+});
+// tslint:disable:max-file-line-count

contracts/coordinator/test/utils/approval_factory.ts

@@ -0,0 +1,38 @@
+import { signingUtils } from '@0x/contracts-test-utils';
+import { SignatureType, SignedZeroExTransaction } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as ethUtil from 'ethereumjs-util';
+
+import { hashUtils, SignedCoordinatorApproval } from './index';
+
+export class ApprovalFactory {
+    private readonly _privateKey: Buffer;
+    private readonly _verifyingContractAddress: string;
+
+    constructor(privateKey: Buffer, verifyingContractAddress: string) {
+        this._privateKey = privateKey;
+        this._verifyingContractAddress = verifyingContractAddress;
+    }
+
+    public newSignedApproval(
+        transaction: SignedZeroExTransaction,
+        txOrigin: string,
+        approvalExpirationTimeSeconds: BigNumber,
+        signatureType: SignatureType = SignatureType.EthSign,
+    ): SignedCoordinatorApproval {
+        const approvalHashBuff = hashUtils.getApprovalHashBuffer(
+            transaction,
+            this._verifyingContractAddress,
+            txOrigin,
+            approvalExpirationTimeSeconds,
+        );
+        const signatureBuff = signingUtils.signMessage(approvalHashBuff, this._privateKey, signatureType);
+        const signedApproval = {
+            txOrigin,
+            transaction,
+            approvalExpirationTimeSeconds,
+            signature: ethUtil.addHexPrefix(signatureBuff.toString('hex')),
+        };
+        return signedApproval;
+    }
+}

contracts/coordinator/test/utils/constants.ts

@@ -0,0 +1,12 @@
+import { BigNumber } from '@0x/utils';
+
+export const constants = {
+    SINGLE_FILL_FN_NAMES: ['fillOrder', 'fillOrKillOrder', 'fillOrderNoThrow'],
+    BATCH_FILL_FN_NAMES: ['batchFillOrders', 'batchFillOrKillOrders', 'batchFillOrdersNoThrow'],
+    MARKET_FILL_FN_NAMES: ['marketBuyOrders', 'marketBuyOrdersNoThrow', 'marketSellOrders', 'marketSellOrdersNoThrow'],
+    MATCH_ORDERS: 'matchOrders',
+    CANCEL_ORDER: 'cancelOrder',
+    BATCH_CANCEL_ORDERS: 'batchCancelOrders',
+    CANCEL_ORDERS_UP_TO: 'cancelOrdersUpTo',
+    TIME_BUFFER: new BigNumber(1000),
+};

contracts/coordinator/test/utils/coordinator_registry_wrapper.ts

@@ -0,0 +1,64 @@
+import { LogDecoder, txDefaults } from '@0x/contracts-test-utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { TransactionReceiptWithDecodedLogs, ZeroExProvider } from 'ethereum-types';
+
+import { artifacts, CoordinatorRegistryContract } from '../../src';
+
+export class CoordinatorRegistryWrapper {
+    private readonly _web3Wrapper: Web3Wrapper;
+    private readonly _provider: ZeroExProvider;
+    private readonly _logDecoder: LogDecoder;
+    private _coordinatorRegistryContract?: CoordinatorRegistryContract;
+    /**
+     * Instanitates an CoordinatorRegistryWrapper
+     * @param provider Web3 provider to use for all JSON RPC requests
+     * Instance of CoordinatorRegistryWrapper
+     */
+    constructor(provider: ZeroExProvider) {
+        this._web3Wrapper = new Web3Wrapper(provider);
+        this._provider = provider;
+        this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);
+    }
+    public async deployCoordinatorRegistryAsync(): Promise<CoordinatorRegistryContract> {
+        this._coordinatorRegistryContract = await CoordinatorRegistryContract.deployFrom0xArtifactAsync(
+            artifacts.CoordinatorRegistry,
+            this._provider,
+            txDefaults,
+        );
+        if (this._coordinatorRegistryContract === undefined) {
+            throw new Error(`Failed to deploy Coordinator Registry contract.`);
+        }
+        return this._coordinatorRegistryContract;
+    }
+    public async setCoordinatorEndpointAsync(
+        coordinatorOperator: string,
+        coordinatorEndpoint: string,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        this._assertCoordinatorRegistryDeployed();
+        const txReceipt = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await (this
+                ._coordinatorRegistryContract as CoordinatorRegistryContract).setCoordinatorEndpoint.sendTransactionAsync(
+                coordinatorEndpoint,
+                {
+                    from: coordinatorOperator,
+                },
+            ),
+        );
+        return txReceipt;
+    }
+    public async getCoordinatorEndpointAsync(coordinatorOperator: string): Promise<string> {
+        this._assertCoordinatorRegistryDeployed();
+        const coordinatorEndpoint = await (this
+            ._coordinatorRegistryContract as CoordinatorRegistryContract).getCoordinatorEndpoint.callAsync(
+            coordinatorOperator,
+        );
+        return coordinatorEndpoint;
+    }
+    private _assertCoordinatorRegistryDeployed(): void {
+        if (this._coordinatorRegistryContract === undefined) {
+            throw new Error(
+                'The Coordinator Registry contract was not deployed through the CoordinatorRegistryWrapper. Call `deployCoordinatorRegistryAsync` to deploy.',
+            );
+        }
+    }
+}

contracts/coordinator/test/utils/exchange_data_encoder.ts

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

contracts/coordinator/test/utils/hash_utils.ts

@@ -0,0 +1,33 @@
+import { eip712Utils } from '@0x/order-utils';
+import { SignedZeroExTransaction } from '@0x/types';
+import { BigNumber, signTypedDataUtils } from '@0x/utils';
+import * as _ from 'lodash';
+
+export const hashUtils = {
+    getApprovalHashBuffer(
+        transaction: SignedZeroExTransaction,
+        verifyingContractAddress: string,
+        txOrigin: string,
+        approvalExpirationTimeSeconds: BigNumber,
+    ): Buffer {
+        const typedData = eip712Utils.createCoordinatorApprovalTypedData(
+            transaction,
+            verifyingContractAddress,
+            txOrigin,
+            approvalExpirationTimeSeconds,
+        );
+        const hashBuffer = signTypedDataUtils.generateTypedDataHash(typedData);
+        return hashBuffer;
+    },
+    getApprovalHashHex(
+        transaction: SignedZeroExTransaction,
+        verifyingContractAddress: string,
+        txOrigin: string,
+        approvalExpirationTimeSeconds: BigNumber,
+    ): string {
+        const hashHex = `0x${hashUtils
+            .getApprovalHashBuffer(transaction, verifyingContractAddress, txOrigin, approvalExpirationTimeSeconds)
+            .toString('hex')}`;
+        return hashHex;
+    },
+};

contracts/coordinator/test/utils/index.ts

@@ -0,0 +1,5 @@
+export { hashUtils } from './hash_utils';
+export { ApprovalFactory } from './approval_factory';
+export { constants } from './constants';
+export { exchangeDataEncoder } from './exchange_data_encoder';
+export * from './types';

contracts/coordinator/test/utils/types.ts

@@ -0,0 +1,12 @@
+import { SignedZeroExTransaction } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+
+export interface CoordinatorApproval {
+    transaction: SignedZeroExTransaction;
+    txOrigin: string;
+    approvalExpirationTimeSeconds: BigNumber;
+}
+
+export interface SignedCoordinatorApproval extends CoordinatorApproval {
+    signature: string;
+}

contracts/coordinator/tsconfig.json

@@ -0,0 +1,7 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": { "outDir": "lib", "rootDir": ".", "resolveJsonModule": true },
+    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
+    "files": ["generated-artifacts/Coordinator.json", "generated-artifacts/CoordinatorRegistry.json"],
+    "exclude": ["./deploy/solc/solc_bin"]
+}

contracts/coordinator/tslint.json

@@ -0,0 +1,6 @@
+{
+    "extends": ["@0x/tslint-config"],
+    "rules": {
+        "custom-no-magic-numbers": false
+    }
+}

contracts/erc1155/CHANGELOG.json

@@ -0,0 +1,75 @@
+[
+    {
+        "timestamp": 1558712885,
+        "version": "1.1.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1557961111,
+        "version": "1.1.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.1.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1557799313
+    },
+    {
+        "timestamp": 1557507213,
+        "version": "1.1.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.1.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ],
+        "timestamp": 1554997931
+    },
+    {
+        "version": "1.1.0",
+        "changes": [
+            {
+                "note": "Run Web3ProviderEngine without excess block polling",
+                "pr": 1695
+            }
+        ],
+        "timestamp": 1553183790
+    },
+    {
+        "timestamp": 1553091633,
+        "version": "1.0.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note": "Created ERC1155 contracts package",
+                "pr": 1657
+            }
+        ]
+    }
+]

contracts/erc1155/CHANGELOG.md

@@ -0,0 +1,38 @@
+<!--
+changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v1.1.6 - _May 24, 2019_
+
+    * Dependencies updated
+
+## v1.1.5 - _May 15, 2019_
+
+    * Dependencies updated
+
+## v1.1.4 - _May 14, 2019_
+
+    * Dependencies updated
+
+## v1.1.2 - _May 10, 2019_
+
+    * Dependencies updated
+
+## v1.1.1 - _April 11, 2019_
+
+    * Dependencies updated
+
+## v1.1.0 - _March 21, 2019_
+
+    * Run Web3ProviderEngine without excess block polling (#1695)
+
+## v1.0.1 - _March 20, 2019_
+
+    * Dependencies updated
+
+## v1.0.0 - _Invalid date_
+
+    * Created ERC1155 contracts package (#1657)

contracts/erc1155/DEPLOYS.json

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

contracts/erc1155/README.md

@@ -0,0 +1,73 @@
+## ERC1155 Tokens
+
+This package contains implementations of various [ERC1155](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md) tokens. Addresses of the deployed contracts can be found in the 0x [wiki](https://0xproject.com/wiki#Deployed-Addresses) or the [DEPLOYS](./DEPLOYS.json) file within this package.
+
+## Installation
+
+**Install**
+
+```bash
+npm install @0x/contracts-erc1155 --save
+```
+
+## Bug bounty
+
+A bug bounty for the 2.0.0 contracts is ongoing! Instructions can be found [here](https://0xproject.com/wiki#Bug-Bounty).
+
+## Contributing
+
+We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+
+For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0x/contracts-erc1155 yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/contracts-erc1155 yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
+
+#### Testing options
+
+Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md).

contracts/erc1155/compiler.json

@@ -0,0 +1,30 @@
+{
+    "artifactsDir": "generated-artifacts",
+    "contractsDir": "contracts",
+    "useDockerisedSolc": false,
+    "compilerSettings": {
+        "evmVersion": "constantinople",
+        "optimizer": { "enabled": true, "runs": 1000000 },
+        "outputSelection": {
+            "*": {
+                "*": [
+                    "abi",
+                    "evm.bytecode.object",
+                    "evm.bytecode.sourceMap",
+                    "evm.deployedBytecode.object",
+                    "evm.deployedBytecode.sourceMap"
+                ]
+            }
+        }
+    },
+    "contracts": [
+        "src/ERC1155.sol",
+        "src/ERC1155Mintable.sol",
+        "src/MixinNonFungibleToken.sol",
+        "src/interfaces/IERC1155.sol",
+        "src/interfaces/IERC1155Mintable.sol",
+        "src/interfaces/IERC1155Receiver.sol",
+        "src/mixins/MNonFungibleToken.sol",
+        "test/DummyERC1155Receiver.sol"
+    ]
+}

contracts/erc1155/contracts/src/ERC1155.sol

@@ -0,0 +1,247 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "@0x/contracts-utils/contracts/src/SafeMath.sol";
+import "@0x/contracts-utils/contracts/src/Address.sol";
+import "./interfaces/IERC1155.sol";
+import "./interfaces/IERC1155Receiver.sol";
+import "./MixinNonFungibleToken.sol";
+
+
+contract ERC1155 is
+    SafeMath,
+    IERC1155,
+    MixinNonFungibleToken
+{
+    using Address for address;
+
+    // selectors for receiver callbacks
+    bytes4 constant public ERC1155_RECEIVED       = 0xf23a6e61;
+    bytes4 constant public ERC1155_BATCH_RECEIVED = 0xbc197c81;
+
+    // id => (owner => balance)
+    mapping (uint256 => mapping(address => uint256)) internal balances;
+
+    // owner => (operator => approved)
+    mapping (address => mapping(address => bool)) internal operatorApproval;
+
+    /// @notice Transfers value amount of an _id from the _from address to the _to address specified.
+    /// @dev MUST emit TransferSingle event on success.
+    /// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
+    /// MUST throw if `_to` is the zero address.
+    /// MUST throw if balance of sender for token `_id` is lower than the `_value` sent.
+    /// MUST throw on any other error.
+    /// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
+    /// If so, it MUST call `onERC1155Received` on `_to` and revert if the return value
+    /// is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`.
+    /// @param from    Source address
+    /// @param to      Target address
+    /// @param id      ID of the token type
+    /// @param value   Transfer amount
+    /// @param data    Additional data with no specified format, sent in call to `_to`
+    function safeTransferFrom(
+        address from,
+        address to,
+        uint256 id,
+        uint256 value,
+        bytes calldata data
+    )
+        external
+    {
+        // sanity checks
+        require(
+            to != address(0x0),
+            "CANNOT_TRANSFER_TO_ADDRESS_ZERO"
+        );
+        require(
+            from == msg.sender || operatorApproval[from][msg.sender] == true,
+            "INSUFFICIENT_ALLOWANCE"
+        );
+
+        // perform transfer
+        if (isNonFungible(id)) {
+            require(
+                    value == 1,
+                    "AMOUNT_EQUAL_TO_ONE_REQUIRED"
+            );
+            require(
+                nfOwners[id] == from,
+                "NFT_NOT_OWNED_BY_FROM_ADDRESS"
+            );
+            nfOwners[id] = to;
+            // You could keep balance of NF type in base type id like so:
+            // uint256 baseType = getNonFungibleBaseType(_id);
+            // balances[baseType][_from] = balances[baseType][_from].safeSub(_value);
+            // balances[baseType][_to]   = balances[baseType][_to].safeAdd(_value);
+        } else {
+            balances[id][from] = safeSub(balances[id][from], value);
+            balances[id][to] = safeAdd(balances[id][to], value);
+        }
+        emit TransferSingle(msg.sender, from, to, id, value);
+
+        // if `to` is a contract then trigger its callback
+        if (to.isContract()) {
+            bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155Received(
+                msg.sender,
+                from,
+                id,
+                value,
+                data
+            );
+            require(
+                callbackReturnValue == ERC1155_RECEIVED,
+                "BAD_RECEIVER_RETURN_VALUE"
+            );
+        }
+    }
+
+    /// @notice Send multiple types of Tokens from a 3rd party in one transfer (with safety call).
+    /// @dev MUST emit TransferBatch event on success.
+    /// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
+    /// MUST throw if `_to` is the zero address.
+    /// MUST throw if length of `_ids` is not the same as length of `_values`.
+    ///  MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_values` sent.
+    /// MUST throw on any other error.
+    /// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
+    /// If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return value
+    /// is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`.
+    /// @param from    Source addresses
+    /// @param to      Target addresses
+    /// @param ids     IDs of each token type
+    /// @param values  Transfer amounts per token type
+    /// @param data    Additional data with no specified format, sent in call to `_to`
+    function safeBatchTransferFrom(
+        address from,
+        address to,
+        uint256[] calldata ids,
+        uint256[] calldata values,
+        bytes calldata data
+    )
+        external
+    {
+        // sanity checks
+        require(
+            to != address(0x0),
+            "CANNOT_TRANSFER_TO_ADDRESS_ZERO"
+        );
+        require(
+            ids.length == values.length,
+            "TOKEN_AND_VALUES_LENGTH_MISMATCH"
+        );
+
+        // Only supporting a global operator approval allows us to do
+        // only 1 check and not to touch storage to handle allowances.
+        require(
+            from == msg.sender || operatorApproval[from][msg.sender] == true,
+            "INSUFFICIENT_ALLOWANCE"
+        );
+
+        // perform transfers
+        for (uint256 i = 0; i < ids.length; ++i) {
+            // Cache value to local variable to reduce read costs.
+            uint256 id = ids[i];
+            uint256 value = values[i];
+
+            if (isNonFungible(id)) {
+                require(
+                    value == 1,
+                    "AMOUNT_EQUAL_TO_ONE_REQUIRED"
+                );
+                require(
+                    nfOwners[id] == from,
+                    "NFT_NOT_OWNED_BY_FROM_ADDRESS"
+                );
+                nfOwners[id] = to;
+            } else {
+                balances[id][from] = safeSub(balances[id][from], value);
+                balances[id][to] = safeAdd(balances[id][to], value);
+            }
+        }
+        emit TransferBatch(msg.sender, from, to, ids, values);
+
+        // if `to` is a contract then trigger its callback
+        if (to.isContract()) {
+            bytes4 callbackReturnValue = IERC1155Receiver(to).onERC1155BatchReceived(
+                msg.sender,
+                from,
+                ids,
+                values,
+                data
+            );
+            require(
+                callbackReturnValue == ERC1155_BATCH_RECEIVED,
+                "BAD_RECEIVER_RETURN_VALUE"
+            );
+        }
+    }
+
+    /// @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
+    /// @dev MUST emit the ApprovalForAll event on success.
+    /// @param operator  Address to add to the set of authorized operators
+    /// @param approved  True if the operator is approved, false to revoke approval
+    function setApprovalForAll(address operator, bool approved) external {
+        operatorApproval[msg.sender][operator] = approved;
+        emit ApprovalForAll(msg.sender, operator, approved);
+    }
+
+    /// @notice Queries the approval status of an operator for a given owner.
+    /// @param owner     The owner of the Tokens
+    /// @param operator  Address of authorized operator
+    /// @return           True if the operator is approved, false if not
+    function isApprovedForAll(address owner, address operator) external view returns (bool) {
+        return operatorApproval[owner][operator];
+    }
+
+    /// @notice Get the balance of an account's Tokens.
+    /// @param owner  The address of the token holder
+    /// @param id     ID of the Token
+    /// @return        The _owner's balance of the Token type requested
+    function balanceOf(address owner, uint256 id) external view returns (uint256) {
+        if (isNonFungibleItem(id)) {
+            return nfOwners[id] == owner ? 1 : 0;
+        }
+        return balances[id][owner];
+    }
+
+    /// @notice Get the balance of multiple account/token pairs
+    /// @param owners The addresses of the token holders
+    /// @param ids    ID of the Tokens
+    /// @return        The _owner's balance of the Token types requested
+    function balanceOfBatch(address[] calldata owners, uint256[] calldata ids) external view returns (uint256[] memory balances_) {
+        // sanity check
+        require(
+            owners.length == ids.length,
+            "OWNERS_AND_IDS_MUST_HAVE_SAME_LENGTH"
+        );
+
+        // get balances
+        balances_ = new uint256[](owners.length);
+        for (uint256 i = 0; i < owners.length; ++i) {
+            uint256 id = ids[i];
+            if (isNonFungibleItem(id)) {
+                balances_[i] = nfOwners[id] == owners[i] ? 1 : 0;
+            } else {
+                balances_[i] = balances[id][owners[i]];
+            }
+        }
+
+        return balances_;
+    }
+}

contracts/erc1155/contracts/src/ERC1155Mintable.sol

@@ -0,0 +1,173 @@
+pragma solidity ^0.5.5;
+
+import "@0x/contracts-utils/contracts/src/SafeMath.sol";
+import "./ERC1155.sol";
+import "./interfaces/IERC1155Mintable.sol";
+
+
+/// @dev Mintable form of ERC1155
+/// Shows how easy it is to mint new items
+contract ERC1155Mintable is
+    IERC1155Mintable,
+    ERC1155
+{
+
+    /// token nonce
+    uint256 internal nonce;
+
+    /// mapping from token to creator
+    mapping (uint256 => address) public creators;
+
+    /// mapping from token to max index
+    mapping (uint256 => uint256) public maxIndex;
+
+    /// asserts token is owned by msg.sender
+    modifier creatorOnly(uint256 _id) {
+        require(creators[_id] == msg.sender);
+        _;
+    }
+
+    /// @dev creates a new token
+    /// @param uri URI of token
+    /// @param isNF is non-fungible token
+    /// @return type_ of token (a unique identifier)
+    function create(
+        string calldata uri,
+        bool isNF
+    )
+        external
+        returns (uint256 type_)
+    { 
+        // Store the type in the upper 128 bits
+        type_ = (++nonce << 128);
+
+        // Set a flag if this is an NFI.
+        if (isNF) {
+            type_ = type_ | TYPE_NF_BIT;
+        }
+
+        // This will allow restricted access to creators.
+        creators[type_] = msg.sender;
+
+        // emit a Transfer event with Create semantic to help with discovery.
+        emit TransferSingle(
+            msg.sender,
+            address(0x0),
+            address(0x0),
+            type_,
+            0
+        );
+
+        if (bytes(uri).length > 0) {
+            emit URI(uri, type_);
+        }
+    }
+
+    /// @dev mints fungible tokens
+    /// @param id token type
+    /// @param to beneficiaries of minted tokens
+    /// @param quantities amounts of minted tokens
+    function mintFungible(
+        uint256 id,
+        address[] calldata to,
+        uint256[] calldata quantities
+    )
+        external
+        creatorOnly(id)
+    {
+        // sanity checks
+        require(
+            isFungible(id),
+            "TRIED_TO_MINT_FUNGIBLE_FOR_NON_FUNGIBLE_TOKEN"
+        );
+
+        // mint tokens
+        for (uint256 i = 0; i < to.length; ++i) {
+            // cache to reduce number of loads
+            address dst = to[i];
+            uint256 quantity = quantities[i];
+
+            // Grant the items to the caller
+            balances[id][dst] = safeAdd(quantity, balances[id][dst]);
+
+            // Emit the Transfer/Mint event.
+            // the 0x0 source address implies a mint
+            // It will also provide the circulating supply info.
+            emit TransferSingle(
+                msg.sender,
+                address(0x0),
+                dst,
+                id,
+                quantity
+            );
+
+            // if `to` is a contract then trigger its callback
+            if (dst.isContract()) {
+                bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
+                    msg.sender,
+                    msg.sender,
+                    id,
+                    quantity,
+                    ""
+                );
+                require(
+                    callbackReturnValue == ERC1155_RECEIVED,
+                    "BAD_RECEIVER_RETURN_VALUE"
+                );
+            }
+        }
+    }
+
+    /// @dev mints a non-fungible token
+    /// @param type_ token type
+    /// @param to beneficiaries of minted tokens
+    function mintNonFungible(
+        uint256 type_,
+        address[] calldata to
+    )
+        external
+        creatorOnly(type_)
+    {
+        // No need to check this is a nf type rather than an id since
+        // creatorOnly() will only let a type pass through.
+        require(
+            isNonFungible(type_),
+            "TRIED_TO_MINT_NON_FUNGIBLE_FOR_FUNGIBLE_TOKEN"
+        );
+
+        // Index are 1-based.
+        uint256 index = maxIndex[type_] + 1;
+
+        for (uint256 i = 0; i < to.length; ++i) {
+            // cache to reduce number of loads
+            address dst = to[i];
+            uint256 id  = type_ | index + i;
+
+            nfOwners[id] = dst;
+
+            // You could use base-type id to store NF type balances if you wish.
+            // balances[_type][dst] = quantity.safeAdd(balances[_type][dst]);
+
+            emit TransferSingle(msg.sender, address(0x0), dst, id, 1);
+
+            // if `to` is a contract then trigger its callback
+            if (dst.isContract()) {
+                bytes4 callbackReturnValue = IERC1155Receiver(dst).onERC1155Received(
+                    msg.sender,
+                    msg.sender,
+                    id,
+                    1,
+                    ""
+                );
+                require(
+                    callbackReturnValue == ERC1155_RECEIVED,
+                    "BAD_RECEIVER_RETURN_VALUE"
+                );
+            }
+        }
+
+        // record the `maxIndex` of this nft type
+        // this allows us to mint more nft's of this type in a subsequent call.
+        maxIndex[type_] = safeAdd(to.length, maxIndex[type_]);
+    }
+}

contracts/erc1155/contracts/src/MixinNonFungibleToken.sol

@@ -0,0 +1,76 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "./mixins/MNonFungibleToken.sol";
+
+
+contract MixinNonFungibleToken is
+    MNonFungibleToken
+{
+    /// Use a split bit implementation.
+    /// Store the type in the upper 128 bits..
+    uint256 constant internal TYPE_MASK = uint256(uint128(~0)) << 128;
+
+    /// ..and the non-fungible index in the lower 128
+    uint256 constant internal NF_INDEX_MASK = uint128(~0);
+
+    /// The top bit is a flag to tell if this is a NFI.
+    uint256 constant internal TYPE_NF_BIT = 1 << 255;
+
+    /// mapping of nft to owner
+    mapping (uint256 => address) internal nfOwners;
+
+    /// @dev Returns true if token is non-fungible
+    function isNonFungible(uint256 id) public pure returns(bool) {
+        return id & TYPE_NF_BIT == TYPE_NF_BIT;
+    }
+
+    /// @dev Returns true if token is fungible
+    function isFungible(uint256 id) public pure returns(bool) {
+        return id & TYPE_NF_BIT == 0;
+    }
+
+    /// @dev Returns index of non-fungible token
+    function getNonFungibleIndex(uint256 id) public pure returns(uint256) {
+        return id & NF_INDEX_MASK;
+    }
+
+    /// @dev Returns base type of non-fungible token
+    function getNonFungibleBaseType(uint256 id) public pure returns(uint256) {
+        return id & TYPE_MASK;
+    }
+
+    /// @dev Returns true if input is base-type of a non-fungible token
+    function isNonFungibleBaseType(uint256 id) public pure returns(bool) {
+        // A base type has the NF bit but does not have an index.
+        return (id & TYPE_NF_BIT == TYPE_NF_BIT) && (id & NF_INDEX_MASK == 0);
+    }
+
+    /// @dev Returns true if input is a non-fungible token
+    function isNonFungibleItem(uint256 id) public pure returns(bool) {
+        // A base type has the NF bit but does has an index.
+        return (id & TYPE_NF_BIT == TYPE_NF_BIT) && (id & NF_INDEX_MASK != 0);
+    }
+    
+    /// @dev returns owner of a non-fungible token
+    function ownerOf(uint256 id) public view returns (address) {
+        return nfOwners[id];
+    }
+}

contracts/erc1155/contracts/src/interfaces/IERC1155.sol

@@ -0,0 +1,152 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+
+/// @title ERC-1155 Multi Token Standard
+/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1155.md
+/// Note: The ERC-165 identifier for this interface is 0xd9b67a26.
+interface IERC1155 {
+    
+    /// @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred,
+    ///      including zero value transfers as well as minting or burning.
+    /// Operator will always be msg.sender.
+    /// Either event from address `0x0` signifies a minting operation.
+    /// An event to address `0x0` signifies a burning or melting operation.
+    /// The total value transferred from address 0x0 minus the total value transferred to 0x0 may
+    /// be used by clients and exchanges to be added to the "circulating supply" for a given token ID.
+    /// To define a token ID with no initial balance, the contract SHOULD emit the TransferSingle event
+    /// from `0x0` to `0x0`, with the token creator as `_operator`.
+    event TransferSingle(
+        address indexed operator,
+        address indexed from,
+        address indexed to,
+        uint256 id,
+        uint256 value
+    );
+
+    /// @dev Either TransferSingle or TransferBatch MUST emit when tokens are transferred,
+    ///      including zero value transfers as well as minting or burning.
+    ///Operator will always be msg.sender.
+    /// Either event from address `0x0` signifies a minting operation.
+    /// An event to address `0x0` signifies a burning or melting operation.
+    /// The total value transferred from address 0x0 minus the total value transferred to 0x0 may
+    /// be used by clients and exchanges to be added to the "circulating supply" for a given token ID.
+    /// To define multiple token IDs with no initial balance, this SHOULD emit the TransferBatch event
+    /// from `0x0` to `0x0`, with the token creator as `_operator`.
+    event TransferBatch(
+        address indexed operator,
+        address indexed from,
+        address indexed to,
+        uint256[] ids,
+        uint256[] values
+    );
+
+    /// @dev MUST emit when an approval is updated.
+    event ApprovalForAll(
+        address indexed owner,
+        address indexed operator,
+        bool approved
+    );
+
+    /// @dev MUST emit when the URI is updated for a token ID.
+    /// URIs are defined in RFC 3986.
+    /// The URI MUST point a JSON file that conforms to the "ERC-1155 Metadata JSON Schema".
+    event URI(
+        string value,
+        uint256 indexed id
+    );
+
+    /// @notice Transfers value amount of an _id from the _from address to the _to address specified.
+    /// @dev MUST emit TransferSingle event on success.
+    /// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
+    /// MUST throw if `_to` is the zero address.
+    /// MUST throw if balance of sender for token `_id` is lower than the `_value` sent.
+    /// MUST throw on any other error.
+    /// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
+    /// If so, it MUST call `onERC1155Received` on `_to` and revert if the return value
+    /// is not `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`.
+    /// @param from    Source address
+    /// @param to      Target address
+    /// @param id      ID of the token type
+    /// @param value   Transfer amount
+    /// @param data    Additional data with no specified format, sent in call to `_to`
+    function safeTransferFrom(
+        address from,
+        address to,
+        uint256 id,
+        uint256 value,
+        bytes calldata data
+    )
+        external;
+
+    /// @notice Send multiple types of Tokens from a 3rd party in one transfer (with safety call).
+    /// @dev MUST emit TransferBatch event on success.
+    /// Caller must be approved to manage the _from account's tokens (see isApprovedForAll).
+    /// MUST throw if `_to` is the zero address.
+    /// MUST throw if length of `_ids` is not the same as length of `_values`.
+    ///  MUST throw if any of the balance of sender for token `_ids` is lower than the respective `_values` sent.
+    /// MUST throw on any other error.
+    /// When transfer is complete, this function MUST check if `_to` is a smart contract (code size > 0).
+    /// If so, it MUST call `onERC1155BatchReceived` on `_to` and revert if the return value
+    /// is not `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`.
+    /// @param from    Source addresses
+    /// @param to      Target addresses
+    /// @param ids     IDs of each token type
+    /// @param values  Transfer amounts per token type
+    /// @param data    Additional data with no specified format, sent in call to `_to`
+    function safeBatchTransferFrom(
+        address from,
+        address to,
+        uint256[] calldata ids,
+        uint256[] calldata values,
+        bytes calldata data
+    )
+        external;
+
+    /// @notice Enable or disable approval for a third party ("operator") to manage all of the caller's tokens.
+    /// @dev MUST emit the ApprovalForAll event on success.
+    /// @param operator  Address to add to the set of authorized operators
+    /// @param approved  True if the operator is approved, false to revoke approval
+    function setApprovalForAll(address operator, bool approved) external;
+
+    /// @notice Queries the approval status of an operator for a given owner.
+    /// @param owner     The owner of the Tokens
+    /// @param operator  Address of authorized operator
+    /// @return           True if the operator is approved, false if not
+    function isApprovedForAll(address owner, address operator) external view returns (bool);
+
+    /// @notice Get the balance of an account's Tokens.
+    /// @param owner  The address of the token holder
+    /// @param id     ID of the Token
+    /// @return        The _owner's balance of the Token type requested
+    function balanceOf(address owner, uint256 id) external view returns (uint256);
+
+    /// @notice Get the balance of multiple account/token pairs
+    /// @param owners The addresses of the token holders
+    /// @param ids    ID of the Tokens
+    /// @return        The _owner's balance of the Token types requested
+    function balanceOfBatch(
+        address[] calldata owners,
+        uint256[] calldata ids
+    )
+        external
+        view
+        returns (uint256[] memory balances_);
+}

contracts/erc1155/contracts/src/interfaces/IERC1155Mintable.sol

@@ -0,0 +1,42 @@
+pragma solidity ^0.5.5;
+
+import "./IERC1155.sol";
+
+
+/// @dev Mintable form of ERC1155
+/// Shows how easy it is to mint new items
+contract IERC1155Mintable is
+    IERC1155
+{
+
+    /// @dev creates a new token
+    /// @param uri URI of token
+    /// @param isNF is non-fungible token
+    /// @return _type of token (a unique identifier)
+    function create(
+        string calldata uri,
+        bool isNF
+    )
+        external
+        returns (uint256 type_);
+
+    /// @dev mints fungible tokens
+    /// @param id token type
+    /// @param to beneficiaries of minted tokens
+    /// @param quantities amounts of minted tokens
+    function mintFungible(
+        uint256 id,
+        address[] calldata to,
+        uint256[] calldata quantities
+    )
+        external;
+
+    /// @dev mints a non-fungible token
+    /// @param type_ token type
+    /// @param to beneficiaries of minted tokens
+    function mintNonFungible(
+        uint256 type_,
+        address[] calldata to
+    )
+        external;
+}

contracts/erc1155/contracts/src/interfaces/IERC1155Receiver.sol

@@ -0,0 +1,67 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+
+interface IERC1155Receiver {
+    
+    /// @notice Handle the receipt of a single ERC1155 token type
+    /// @dev The smart contract calls this function on the recipient
+    /// after a `safeTransferFrom`. This function MAY throw to revert and reject the
+    /// transfer. Return of other than the magic value MUST result in the
+    ///transaction being reverted
+    /// Note: the contract address is always the message sender
+    /// @param operator  The address which called `safeTransferFrom` function
+    /// @param from      The address which previously owned the token
+    /// @param id        An array containing the ids of the token being transferred
+    /// @param value     An array containing the amount of tokens being transferred
+    /// @param data      Additional data with no specified format
+    /// @return          `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
+    function onERC1155Received(
+        address operator,
+        address from,
+        uint256 id,
+        uint256 value,
+        bytes calldata data
+    )
+        external
+        returns(bytes4);
+
+    /// @notice Handle the receipt of multiple ERC1155 token types
+    /// @dev The smart contract calls this function on the recipient
+    /// after a `safeTransferFrom`. This function MAY throw to revert and reject the
+    /// transfer. Return of other than the magic value MUST result in the
+    /// transaction being reverted
+    /// Note: the contract address is always the message sender
+    /// @param operator  The address which called `safeTransferFrom` function
+    /// @param from      The address which previously owned the token
+    /// @param ids       An array containing ids of each token being transferred
+    /// @param values    An array containing amounts of each token being transferred
+    /// @param data      Additional data with no specified format
+    /// @return           `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
+    function onERC1155BatchReceived(
+        address operator,
+        address from,
+        uint256[] calldata ids,
+        uint256[] calldata values,
+        bytes calldata data
+    )
+        external
+        returns(bytes4);
+}

contracts/erc1155/contracts/src/mixins/MNonFungibleToken.sol

@@ -0,0 +1,44 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+
+contract MNonFungibleToken {
+
+    /// @dev Returns true if token is non-fungible
+    function isNonFungible(uint256 id) public pure returns(bool);
+
+    /// @dev Returns true if token is fungible
+    function isFungible(uint256 _d) public pure returns(bool);
+
+    /// @dev Returns index of non-fungible token
+    function getNonFungibleIndex(uint256 id) public pure returns(uint256);
+
+    /// @dev Returns base type of non-fungible token
+    function getNonFungibleBaseType(uint256 id) public pure returns(uint256);
+
+    /// @dev Returns true if input is base-type of a non-fungible token
+    function isNonFungibleBaseType(uint256 id) public pure returns(bool);
+
+    /// @dev Returns true if input is a non-fungible token
+    function isNonFungibleItem(uint256 id) public pure returns(bool);
+
+    /// @dev returns owner of a non-fungible token
+    function ownerOf(uint256 id) public view returns (address);
+}

contracts/erc1155/contracts/test/DummyERC1155Receiver.sol

@@ -0,0 +1,126 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.5.5;
+
+import "../src/interfaces/IERC1155Receiver.sol";
+
+
+contract DummyERC1155Receiver is
+    IERC1155Receiver
+{
+
+    bytes4 constant public ERC1155_RECEIVED       = 0xf23a6e61;
+    bytes4 constant public ERC1155_BATCH_RECEIVED = 0xbc197c81;
+    bool internal shouldRejectTransfer;
+
+    event TokenReceived(
+        address operator,
+        address from,
+        uint256 tokenId,
+        uint256 tokenValue,
+        bytes data
+    );
+
+    event BatchTokenReceived(
+        address operator,
+        address from,
+        uint256[] tokenIds,
+        uint256[] tokenValues,
+        bytes data
+    );
+    
+    constructor () public {
+        shouldRejectTransfer = false;
+    }
+
+    /// @notice Handle the receipt of a single ERC1155 token type
+    /// @dev The smart contract calls this function on the recipient
+    /// after a `safeTransferFrom`. This function MAY throw to revert and reject the
+    /// transfer. Return of other than the magic value MUST result in the
+    ///transaction being reverted
+    /// Note: the contract address is always the message sender
+    /// @param operator  The address which called `safeTransferFrom` function
+    /// @param from      The address which previously owned the token
+    /// @param id        An array containing the ids of the token being transferred
+    /// @param value     An array containing the amount of tokens being transferred
+    /// @param data      Additional data with no specified format
+    /// @return           `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
+    function onERC1155Received(
+        address operator,
+        address from,
+        uint256 id,
+        uint256 value,
+        bytes calldata data
+    )
+        external
+        returns(bytes4)
+    {
+        if (shouldRejectTransfer) {
+            revert("TRANSFER_REJECTED");
+        }
+        emit TokenReceived(
+            operator,
+            from,
+            id,
+            value,
+            data
+        );
+        return ERC1155_RECEIVED;
+    }
+
+    /// @notice Handle the receipt of multiple ERC1155 token types
+    /// @dev The smart contract calls this function on the recipient
+    /// after a `safeTransferFrom`. This function MAY throw to revert and reject the
+    /// transfer. Return of other than the magic value MUST result in the
+    /// transaction being reverted
+    /// Note: the contract address is always the message sender
+    /// @param operator  The address which called `safeTransferFrom` function
+    /// @param from      The address which previously owned the token
+    /// @param ids       An array containing ids of each token being transferred
+    /// @param values    An array containing amounts of each token being transferred
+    /// @param data      Additional data with no specified format
+    /// @return          `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
+    function onERC1155BatchReceived(
+        address operator,
+        address from,
+        uint256[] calldata ids,
+        uint256[] calldata values,
+        bytes calldata data
+    )
+        external
+        returns (bytes4)
+    {
+        if (shouldRejectTransfer) {
+            revert("TRANSFER_REJECTED");
+        }
+        emit BatchTokenReceived(
+            operator,
+            from,
+            ids,
+            values,
+            data
+        );
+        return ERC1155_BATCH_RECEIVED;
+    }
+
+    // @dev If set to true then all future transfers will be rejected.
+    function setRejectTransferFlag(bool _shouldRejectTransfer) external {
+        shouldRejectTransfer = _shouldRejectTransfer;
+    }
+}

contracts/erc1155/package.json

@@ -0,0 +1,83 @@
+{
+    "name": "@0x/contracts-erc1155",
+    "version": "1.1.6",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Token contracts used by 0x protocol",
+    "main": "lib/src/index.js",
+    "directories": {
+        "test": "test"
+    },
+    "scripts": {
+        "build": "yarn pre_build && tsc -b",
+        "build:ci": "yarn build",
+        "pre_build": "run-s compile generate_contract_wrappers",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
+        "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
+        "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
+        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
+        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
+        "compile": "sol-compiler",
+        "watch": "sol-compiler -w",
+        "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
+        "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
+        "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "fix": "tslint --fix --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "coverage:report:text": "istanbul report text",
+        "coverage:report:html": "istanbul report html && open coverage/index.html",
+        "profiler:report:html": "istanbul report html && open coverage/index.html",
+        "coverage:report:lcov": "istanbul report lcov",
+        "test:circleci": "yarn test",
+        "contracts:gen": "contracts-gen",
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "generated-artifacts/@(DummyERC1155Receiver|ERC1155|ERC1155Mintable|IERC1155|IERC1155Mintable|IERC1155Receiver|MNonFungibleToken|MixinNonFungibleToken).json",
+        "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually."
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "license": "Apache-2.0",
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
+    "devDependencies": {
+        "@0x/abi-gen": "^2.0.10",
+        "@0x/contracts-gen": "^1.0.9",
+        "@0x/dev-utils": "^2.2.3",
+        "@0x/sol-compiler": "^3.1.8",
+        "@0x/tslint-config": "^3.0.1",
+        "@types/lodash": "4.14.104",
+        "@types/node": "*",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^3.0.0",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.1.0",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "solhint": "^1.4.1",
+        "tslint": "5.11.0",
+        "typescript": "3.0.1"
+    },
+    "dependencies": {
+        "@0x/base-contract": "^5.1.0",
+        "@0x/contracts-test-utils": "^3.1.7",
+        "@0x/contracts-utils": "^3.1.6",
+        "@0x/types": "^2.2.2",
+        "@0x/typescript-typings": "^4.2.2",
+        "@0x/utils": "^4.3.3",
+        "@0x/web3-wrapper": "^6.0.6",
+        "ethereum-types": "^2.1.2",
+        "lodash": "^4.17.11"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}

contracts/erc1155/src/artifacts.ts

@@ -0,0 +1,25 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+import { ContractArtifact } from 'ethereum-types';
+
+import * as DummyERC1155Receiver from '../generated-artifacts/DummyERC1155Receiver.json';
+import * as ERC1155 from '../generated-artifacts/ERC1155.json';
+import * as ERC1155Mintable from '../generated-artifacts/ERC1155Mintable.json';
+import * as IERC1155 from '../generated-artifacts/IERC1155.json';
+import * as IERC1155Mintable from '../generated-artifacts/IERC1155Mintable.json';
+import * as IERC1155Receiver from '../generated-artifacts/IERC1155Receiver.json';
+import * as MixinNonFungibleToken from '../generated-artifacts/MixinNonFungibleToken.json';
+import * as MNonFungibleToken from '../generated-artifacts/MNonFungibleToken.json';
+export const artifacts = {
+    DummyERC1155Receiver: DummyERC1155Receiver as ContractArtifact,
+    ERC1155: ERC1155 as ContractArtifact,
+    MNonFungibleToken: MNonFungibleToken as ContractArtifact,
+    ERC1155Mintable: ERC1155Mintable as ContractArtifact,
+    MixinNonFungibleToken: MixinNonFungibleToken as ContractArtifact,
+    IERC1155Mintable: IERC1155Mintable as ContractArtifact,
+    IERC1155Receiver: IERC1155Receiver as ContractArtifact,
+    IERC1155: IERC1155 as ContractArtifact,
+};

contracts/erc1155/src/index.ts

@@ -0,0 +1,3 @@
+export * from './wrappers';
+export * from './artifacts';
+export { Erc1155Wrapper } from '../test/utils/erc1155_wrapper';

contracts/erc1155/src/wrappers.ts

@@ -0,0 +1,13 @@
+/*
+ * -----------------------------------------------------------------------------
+ * Warning: This file is auto-generated by contracts-gen. Don't edit manually.
+ * -----------------------------------------------------------------------------
+ */
+export * from '../generated-wrappers/dummy_erc1155_receiver';
+export * from '../generated-wrappers/erc1155';
+export * from '../generated-wrappers/erc1155_mintable';
+export * from '../generated-wrappers/i_erc1155_mintable';
+export * from '../generated-wrappers/i_erc1155_receiver';
+export * from '../generated-wrappers/ierc1155';
+export * from '../generated-wrappers/m_non_fungible_token';
+export * from '../generated-wrappers/mixin_non_fungible_token';

contracts/erc1155/test/erc1155_token.ts

@@ -0,0 +1,492 @@
+import {
+    chaiSetup,
+    constants,
+    expectTransactionFailedAsync,
+    provider,
+    txDefaults,
+    web3Wrapper,
+} from '@0x/contracts-test-utils';
+import { BlockchainLifecycle } from '@0x/dev-utils';
+import { RevertReason } from '@0x/types';
+import { BigNumber } from '@0x/utils';
+import * as chai from 'chai';
+import { LogWithDecodedArgs } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import {
+    artifacts,
+    DummyERC1155ReceiverBatchTokenReceivedEventArgs,
+    DummyERC1155ReceiverContract,
+    ERC1155MintableContract,
+} from '../src';
+
+import { Erc1155Wrapper } from './utils/erc1155_wrapper';
+
+chaiSetup.configure();
+const expect = chai.expect;
+const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);
+// tslint:disable:no-unnecessary-type-assertion
+describe('ERC1155Token', () => {
+    // constant values used in transfer tests
+    const nftOwnerBalance = new BigNumber(1);
+    const nftNotOwnerBalance = new BigNumber(0);
+    const spenderInitialFungibleBalance = new BigNumber(500);
+    const receiverInitialFungibleBalance = new BigNumber(0);
+    const fungibleValueToTransfer = spenderInitialFungibleBalance.div(2);
+    const nonFungibleValueToTransfer = nftOwnerBalance;
+    const receiverCallbackData = '0x01020304';
+    // tokens & addresses
+    let owner: string;
+    let spender: string;
+    let delegatedSpender: string;
+    let receiver: string;
+    let erc1155Contract: ERC1155MintableContract;
+    let erc1155Receiver: DummyERC1155ReceiverContract;
+    let nonFungibleToken: BigNumber;
+    let erc1155Wrapper: Erc1155Wrapper;
+    let fungibleToken: BigNumber;
+    // tests
+    before(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    after(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    before(async () => {
+        // deploy erc1155 contract & receiver
+        const accounts = await web3Wrapper.getAvailableAddressesAsync();
+        [owner, spender, delegatedSpender] = accounts;
+        erc1155Contract = await ERC1155MintableContract.deployFrom0xArtifactAsync(
+            artifacts.ERC1155Mintable,
+            provider,
+            txDefaults,
+        );
+        erc1155Receiver = await DummyERC1155ReceiverContract.deployFrom0xArtifactAsync(
+            artifacts.DummyERC1155Receiver,
+            provider,
+            txDefaults,
+        );
+        receiver = erc1155Receiver.address;
+        // create wrapper & mint erc1155 tokens
+        erc1155Wrapper = new Erc1155Wrapper(erc1155Contract, provider, owner);
+        fungibleToken = await erc1155Wrapper.mintFungibleTokensAsync([spender], spenderInitialFungibleBalance);
+        let nonFungibleTokens: BigNumber[];
+        [, nonFungibleTokens] = await erc1155Wrapper.mintNonFungibleTokensAsync([spender]);
+        nonFungibleToken = nonFungibleTokens[0];
+    });
+    beforeEach(async () => {
+        await blockchainLifecycle.startAsync();
+    });
+    afterEach(async () => {
+        await blockchainLifecycle.revertAsync();
+    });
+    describe('safeTransferFrom', () => {
+        it('should transfer fungible token if called by token owner', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = fungibleValueToTransfer;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeTransferFromAsync(
+                spender,
+                receiver,
+                fungibleToken,
+                valueToTransfer,
+                receiverCallbackData,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(valueToTransfer),
+                receiverInitialFungibleBalance.plus(valueToTransfer),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedFinalBalances);
+        });
+        it('should transfer non-fungible token if called by token owner', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = nonFungibleToken;
+            const valueToTransfer = nonFungibleValueToTransfer;
+            // check balances before transfer
+            const expectedInitialBalances = [nftOwnerBalance, nftNotOwnerBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeTransferFromAsync(
+                spender,
+                receiver,
+                tokenToTransfer,
+                valueToTransfer,
+                receiverCallbackData,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [nftNotOwnerBalance, nftOwnerBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedFinalBalances);
+        });
+        it('should trigger callback if transferring to a contract', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = fungibleValueToTransfer;
+            // check balances before transfer
+            const expectedInitialBalances = [
+                spenderInitialFungibleBalance,
+                receiverInitialFungibleBalance,
+                nftOwnerBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            const tx = await erc1155Wrapper.safeTransferFromAsync(
+                spender,
+                receiver,
+                tokenToTransfer,
+                valueToTransfer,
+                receiverCallbackData,
+            );
+            expect(tx.logs.length).to.be.equal(2);
+            const receiverLog = tx.logs[1] as LogWithDecodedArgs<DummyERC1155ReceiverBatchTokenReceivedEventArgs>;
+            // check callback logs
+            const expectedCallbackLog = {
+                operator: spender,
+                from: spender,
+                tokenId: tokenToTransfer,
+                tokenValue: valueToTransfer,
+                data: receiverCallbackData,
+            };
+            expect(receiverLog.args.operator).to.be.equal(expectedCallbackLog.operator);
+            expect(receiverLog.args.from).to.be.equal(expectedCallbackLog.from);
+            expect(receiverLog.args.tokenId).to.be.bignumber.equal(expectedCallbackLog.tokenId);
+            expect(receiverLog.args.tokenValue).to.be.bignumber.equal(expectedCallbackLog.tokenValue);
+            expect(receiverLog.args.data).to.be.deep.equal(expectedCallbackLog.data);
+            // check balances after transfer
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(valueToTransfer),
+                receiverInitialFungibleBalance.plus(valueToTransfer),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedFinalBalances);
+        });
+        it('should throw if transfer reverts', async () => {
+            // setup test parameters
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = spenderInitialFungibleBalance.plus(1);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokenToTransfer,
+                    valueToTransfer,
+                    receiverCallbackData,
+                    { from: spender },
+                ),
+                RevertReason.Uint256Underflow,
+            );
+        });
+        it('should throw if callback reverts', async () => {
+            // setup test parameters
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = fungibleValueToTransfer;
+            // set receiver to reject balances
+            const shouldRejectTransfer = true;
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await erc1155Receiver.setRejectTransferFlag.sendTransactionAsync(shouldRejectTransfer),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokenToTransfer,
+                    valueToTransfer,
+                    receiverCallbackData,
+                    { from: spender },
+                ),
+                RevertReason.TransferRejected,
+            );
+        });
+    });
+    describe('batchSafeTransferFrom', () => {
+        it('should transfer fungible tokens if called by token owner', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [fungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeBatchTransferFromAsync(
+                spender,
+                receiver,
+                tokensToTransfer,
+                valuesToTransfer,
+                receiverCallbackData,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(valuesToTransfer[0]),
+                receiverInitialFungibleBalance.plus(valuesToTransfer[0]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should transfer non-fungible token if called by token owner', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [nonFungibleToken];
+            const valuesToTransfer = [nonFungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [nftOwnerBalance, nftNotOwnerBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeBatchTransferFromAsync(
+                spender,
+                receiver,
+                tokensToTransfer,
+                valuesToTransfer,
+                receiverCallbackData,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [nftNotOwnerBalance, nftOwnerBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should transfer mix of fungible / non-fungible tokens if called by token owner', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [fungibleToken, nonFungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer, nonFungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                spenderInitialFungibleBalance,
+                nftOwnerBalance,
+                // receiver
+                receiverInitialFungibleBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeBatchTransferFromAsync(
+                spender,
+                receiver,
+                tokensToTransfer,
+                valuesToTransfer,
+                receiverCallbackData,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                // spender
+                spenderInitialFungibleBalance.minus(valuesToTransfer[0]),
+                nftNotOwnerBalance,
+                // receiver
+                receiverInitialFungibleBalance.plus(valuesToTransfer[0]),
+                nftOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should trigger callback if transferring to a contract', async () => {
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [fungibleToken, nonFungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer, nonFungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [
+                // spender
+                spenderInitialFungibleBalance,
+                nftOwnerBalance,
+                // receiver
+                receiverInitialFungibleBalance,
+                nftNotOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            const tx = await erc1155Wrapper.safeBatchTransferFromAsync(
+                spender,
+                receiver,
+                tokensToTransfer,
+                valuesToTransfer,
+                receiverCallbackData,
+            );
+            expect(tx.logs.length).to.be.equal(2);
+            const receiverLog = tx.logs[1] as LogWithDecodedArgs<DummyERC1155ReceiverBatchTokenReceivedEventArgs>;
+            // check callback logs
+            const expectedCallbackLog = {
+                operator: spender,
+                from: spender,
+                tokenIds: tokensToTransfer,
+                tokenValues: valuesToTransfer,
+                data: receiverCallbackData,
+            };
+            expect(receiverLog.args.operator).to.be.equal(expectedCallbackLog.operator);
+            expect(receiverLog.args.from).to.be.equal(expectedCallbackLog.from);
+            expect(receiverLog.args.tokenIds.length).to.be.equal(2);
+            expect(receiverLog.args.tokenIds[0]).to.be.bignumber.equal(expectedCallbackLog.tokenIds[0]);
+            expect(receiverLog.args.tokenIds[1]).to.be.bignumber.equal(expectedCallbackLog.tokenIds[1]);
+            expect(receiverLog.args.tokenValues.length).to.be.equal(2);
+            expect(receiverLog.args.tokenValues[0]).to.be.bignumber.equal(expectedCallbackLog.tokenValues[0]);
+            expect(receiverLog.args.tokenValues[1]).to.be.bignumber.equal(expectedCallbackLog.tokenValues[1]);
+            expect(receiverLog.args.data).to.be.deep.equal(expectedCallbackLog.data);
+            // check balances after transfer
+            const expectedFinalBalances = [
+                // spender
+                spenderInitialFungibleBalance.minus(valuesToTransfer[0]),
+                nftNotOwnerBalance,
+                // receiver
+                receiverInitialFungibleBalance.plus(valuesToTransfer[0]),
+                nftOwnerBalance,
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should throw if transfer reverts', async () => {
+            // setup test parameters
+            const tokensToTransfer = [fungibleToken];
+            const valuesToTransfer = [spenderInitialFungibleBalance.plus(1)];
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeBatchTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                    { from: spender },
+                ),
+                RevertReason.Uint256Underflow,
+            );
+        });
+        it('should throw if callback reverts', async () => {
+            // setup test parameters
+            const tokensToTransfer = [fungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer];
+            // set receiver to reject balances
+            const shouldRejectTransfer = true;
+            await web3Wrapper.awaitTransactionSuccessAsync(
+                await erc1155Receiver.setRejectTransferFlag.sendTransactionAsync(shouldRejectTransfer),
+                constants.AWAIT_TRANSACTION_MINED_MS,
+            );
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeBatchTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                    { from: spender },
+                ),
+                RevertReason.TransferRejected,
+            );
+        });
+    });
+    describe('setApprovalForAll', () => {
+        it('should transfer token via safeTransferFrom if called by approved account', async () => {
+            // set approval
+            const isApprovedForAll = true;
+            await erc1155Wrapper.setApprovalForAllAsync(spender, delegatedSpender, isApprovedForAll);
+            const isApprovedForAllCheck = await erc1155Wrapper.isApprovedForAllAsync(spender, delegatedSpender);
+            expect(isApprovedForAllCheck).to.be.true();
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = fungibleValueToTransfer;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeTransferFromAsync(
+                spender,
+                receiver,
+                tokenToTransfer,
+                valueToTransfer,
+                receiverCallbackData,
+                delegatedSpender,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(valueToTransfer),
+                receiverInitialFungibleBalance.plus(valueToTransfer),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedFinalBalances);
+        });
+        it('should throw if trying to transfer tokens via safeTransferFrom by an unapproved account', async () => {
+            // check approval not set
+            const isApprovedForAllCheck = await erc1155Wrapper.isApprovedForAllAsync(spender, delegatedSpender);
+            expect(isApprovedForAllCheck).to.be.false();
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokenToTransfer = fungibleToken;
+            const valueToTransfer = fungibleValueToTransfer;
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, [tokenToTransfer], expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokenToTransfer,
+                    valueToTransfer,
+                    receiverCallbackData,
+                    { from: delegatedSpender },
+                ),
+                RevertReason.InsufficientAllowance,
+            );
+        });
+        it('should transfer token via safeBatchTransferFrom if called by approved account', async () => {
+            // set approval
+            const isApprovedForAll = true;
+            await erc1155Wrapper.setApprovalForAllAsync(spender, delegatedSpender, isApprovedForAll);
+            const isApprovedForAllCheck = await erc1155Wrapper.isApprovedForAllAsync(spender, delegatedSpender);
+            expect(isApprovedForAllCheck).to.be.true();
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [fungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await erc1155Wrapper.safeBatchTransferFromAsync(
+                spender,
+                receiver,
+                tokensToTransfer,
+                valuesToTransfer,
+                receiverCallbackData,
+                delegatedSpender,
+            );
+            // check balances after transfer
+            const expectedFinalBalances = [
+                spenderInitialFungibleBalance.minus(valuesToTransfer[0]),
+                receiverInitialFungibleBalance.plus(valuesToTransfer[0]),
+            ];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedFinalBalances);
+        });
+        it('should throw if trying to transfer tokens via safeBatchTransferFrom by an unapproved account', async () => {
+            // check approval not set
+            const isApprovedForAllCheck = await erc1155Wrapper.isApprovedForAllAsync(spender, delegatedSpender);
+            expect(isApprovedForAllCheck).to.be.false();
+            // setup test parameters
+            const tokenHolders = [spender, receiver];
+            const tokensToTransfer = [fungibleToken];
+            const valuesToTransfer = [fungibleValueToTransfer];
+            // check balances before transfer
+            const expectedInitialBalances = [spenderInitialFungibleBalance, receiverInitialFungibleBalance];
+            await erc1155Wrapper.assertBalancesAsync(tokenHolders, tokensToTransfer, expectedInitialBalances);
+            // execute transfer
+            await expectTransactionFailedAsync(
+                erc1155Contract.safeBatchTransferFrom.sendTransactionAsync(
+                    spender,
+                    receiver,
+                    tokensToTransfer,
+                    valuesToTransfer,
+                    receiverCallbackData,
+                    { from: delegatedSpender },
+                ),
+                RevertReason.InsufficientAllowance,
+            );
+        });
+    });
+});
+// tslint:enable:no-unnecessary-type-assertion

contracts/erc1155/test/global_hooks.ts

@@ -0,0 +1,19 @@
+import { env, EnvVars } from '@0x/dev-utils';
+
+import { coverage, profiler, provider } from '@0x/contracts-test-utils';
+import { providerUtils } from '@0x/utils';
+
+before('start web3 provider', () => {
+    providerUtils.startProviderEngine(provider);
+});
+after('generate coverage report', async () => {
+    if (env.parseBoolean(EnvVars.SolidityCoverage)) {
+        const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
+        await coverageSubprovider.writeCoverageAsync();
+    }
+    if (env.parseBoolean(EnvVars.SolidityProfiler)) {
+        const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+        await profilerSubprovider.writeProfilerOutputAsync();
+    }
+    provider.stop();
+});

contracts/erc1155/test/utils/erc1155_wrapper.ts

@@ -0,0 +1,159 @@
+import { constants, LogDecoder } from '@0x/contracts-test-utils';
+import { BigNumber } from '@0x/utils';
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import * as chai from 'chai';
+import { LogWithDecodedArgs, Provider, TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { artifacts, ERC1155MintableContract, ERC1155TransferSingleEventArgs } from '../../src';
+
+const expect = chai.expect;
+
+export class Erc1155Wrapper {
+    private readonly _erc1155Contract: ERC1155MintableContract;
+    private readonly _web3Wrapper: Web3Wrapper;
+    private readonly _contractOwner: string;
+    private readonly _logDecoder: LogDecoder;
+
+    constructor(contractInstance: ERC1155MintableContract, provider: Provider, contractOwner: string) {
+        this._erc1155Contract = contractInstance;
+        this._web3Wrapper = new Web3Wrapper(provider);
+        this._contractOwner = contractOwner;
+        this._logDecoder = new LogDecoder(this._web3Wrapper, artifacts);
+    }
+    public getContract(): ERC1155MintableContract {
+        return this._erc1155Contract;
+    }
+    public async getBalancesAsync(owners: string[], tokens: BigNumber[]): Promise<BigNumber[]> {
+        const balances = await this._erc1155Contract.balanceOfBatch.callAsync(owners, tokens);
+        return balances;
+    }
+    public async safeTransferFromAsync(
+        from: string,
+        to: string,
+        token: BigNumber,
+        value: BigNumber,
+        callbackData?: string,
+        delegatedSpender?: string,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        const spender = delegatedSpender === undefined ? from : delegatedSpender;
+        const callbackDataHex = callbackData === undefined ? '0x' : callbackData;
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this._erc1155Contract.safeTransferFrom.sendTransactionAsync(from, to, token, value, callbackDataHex, {
+                from: spender,
+            }),
+        );
+        return tx;
+    }
+    public async safeBatchTransferFromAsync(
+        from: string,
+        to: string,
+        tokens: BigNumber[],
+        values: BigNumber[],
+        callbackData?: string,
+        delegatedSpender?: string,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        const spender = delegatedSpender === undefined ? from : delegatedSpender;
+        const callbackDataHex = callbackData === undefined ? '0x' : callbackData;
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this._erc1155Contract.safeBatchTransferFrom.sendTransactionAsync(
+                from,
+                to,
+                tokens,
+                values,
+                callbackDataHex,
+                { from: spender },
+            ),
+        );
+        return tx;
+    }
+    public async mintFungibleTokensAsync(
+        beneficiaries: string[],
+        tokenAmounts: BigNumber | BigNumber[],
+    ): Promise<BigNumber> {
+        const tokenUri = 'dummyFungibleToken';
+        const tokenIsNonFungible = false;
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this._erc1155Contract.create.sendTransactionAsync(tokenUri, tokenIsNonFungible, {
+                from: this._contractOwner,
+            }),
+        );
+        // tslint:disable-next-line no-unnecessary-type-assertion
+        const createFungibleTokenLog = tx.logs[0] as LogWithDecodedArgs<ERC1155TransferSingleEventArgs>;
+        const token = createFungibleTokenLog.args.id;
+        const tokenAmountsAsArray = _.isArray(tokenAmounts) ? tokenAmounts : [];
+        if (!_.isArray(tokenAmounts)) {
+            _.each(_.range(0, beneficiaries.length), () => {
+                tokenAmountsAsArray.push(tokenAmounts);
+            });
+        }
+        await this._web3Wrapper.awaitTransactionSuccessAsync(
+            await this._erc1155Contract.mintFungible.sendTransactionAsync(token, beneficiaries, tokenAmountsAsArray, {
+                from: this._contractOwner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        return token;
+    }
+    public async mintNonFungibleTokensAsync(beneficiaries: string[]): Promise<[BigNumber, BigNumber[]]> {
+        const tokenUri = 'dummyNonFungibleToken';
+        const tokenIsNonFungible = true;
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this._erc1155Contract.create.sendTransactionAsync(tokenUri, tokenIsNonFungible, {
+                from: this._contractOwner,
+            }),
+        );
+        // tslint:disable-next-line no-unnecessary-type-assertion
+        const createFungibleTokenLog = tx.logs[0] as LogWithDecodedArgs<ERC1155TransferSingleEventArgs>;
+        const token = createFungibleTokenLog.args.id;
+        await this._web3Wrapper.awaitTransactionSuccessAsync(
+            await this._erc1155Contract.mintNonFungible.sendTransactionAsync(token, beneficiaries, {
+                from: this._contractOwner,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );
+        const encodedNftIds: BigNumber[] = [];
+        const nftIdBegin = 1;
+        const nftIdEnd = beneficiaries.length + 1;
+        const nftIdRange = _.range(nftIdBegin, nftIdEnd);
+        _.each(nftIdRange, (nftId: number) => {
+            const encodedNftId = token.plus(nftId);
+            encodedNftIds.push(encodedNftId);
+        });
+        return [token, encodedNftIds];
+    }
+    public async setApprovalForAllAsync(
+        owner: string,
+        beneficiary: string,
+        isApproved: boolean,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        const tx = await this._logDecoder.getTxWithDecodedLogsAsync(
+            await this._erc1155Contract.setApprovalForAll.sendTransactionAsync(beneficiary, isApproved, {
+                from: owner,
+            }),
+        );
+        return tx;
+    }
+    public async isApprovedForAllAsync(owner: string, beneficiary: string): Promise<boolean> {
+        const isApprovedForAll = await this._erc1155Contract.isApprovedForAll.callAsync(owner, beneficiary);
+        return isApprovedForAll;
+    }
+    public async assertBalancesAsync(
+        owners: string[],
+        tokens: BigNumber[],
+        expectedBalances: BigNumber[],
+    ): Promise<void> {
+        const ownersExtended: string[] = [];
+        let tokensExtended: BigNumber[] = [];
+        _.each(owners, (owner: string) => {
+            tokensExtended = tokensExtended.concat(tokens);
+            _.each(_.range(0, tokens.length), () => {
+                ownersExtended.push(owner);
+            });
+        });
+        const balances = await this.getBalancesAsync(ownersExtended, tokensExtended);
+        _.each(balances, (balance: BigNumber, i: number) => {
+            expect(balance, `${ownersExtended[i]}${tokensExtended[i]}`).to.be.bignumber.equal(expectedBalances[i]);
+        });
+    }
+}

contracts/erc1155/tsconfig.json

@@ -0,0 +1,16 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": { "outDir": "lib", "rootDir": ".", "resolveJsonModule": true },
+    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
+    "files": [
+        "generated-artifacts/DummyERC1155Receiver.json",
+        "generated-artifacts/ERC1155.json",
+        "generated-artifacts/ERC1155Mintable.json",
+        "generated-artifacts/IERC1155.json",
+        "generated-artifacts/IERC1155Mintable.json",
+        "generated-artifacts/IERC1155Receiver.json",
+        "generated-artifacts/MNonFungibleToken.json",
+        "generated-artifacts/MixinNonFungibleToken.json"
+    ],
+    "exclude": ["./deploy/solc/solc_bin"]
+}

contracts/erc1155/tslint.json

@@ -0,0 +1,6 @@
+{
+    "extends": ["@0x/tslint-config"],
+    "rules": {
+        "custom-no-magic-numbers": false
+    }
+}