Publish

- @0x/contracts-asset-proxy@2.2.6 - @0x/contracts-coordinator@2.0.11 - @0x/contracts-dev-utils@0.0.8 - @0x/contracts-erc1155@1.1.13 - @0x/contracts-erc20@2.2.12 - @0x/contracts-erc721@2.1.13 - @0x/contracts-exchange-forwarder@3.0.10 - @0x/contracts-exchange-libs@3.0.6 - @0x/contracts-exchange@2.1.12 - @0x/contracts-extensions@4.0.6 - @0x/contracts-multisig@3.1.12 - @0x/contracts-test-utils@3.1.14 - @0x/contracts-utils@3.2.2 - 0x.js@7.0.0 - @0x/abi-gen-templates@2.4.2 - @0x/abi-gen-wrappers@5.3.0 - @0x/abi-gen@4.1.1 - @0x/assert@2.1.4 - @0x/asset-buyer@6.1.12 - @0x/asset-swapper@1.0.2 - @0x/base-contract@5.3.2 - @0x/connect@5.0.17 - @0x/contract-addresses@3.1.0 - @0x/contract-artifacts@2.2.0 - @0x/contract-wrappers@11.1.0 - @0x/dev-utils@2.3.1 - @0x/fill-scenarios@3.0.17 - @0x/instant@1.0.29 - @0x/json-schemas@4.0.0 - @0x/migrations@4.3.0 - @0x/monorepo-scripts@1.0.35 - @0x/order-utils@8.3.0 - @0x/python-contract-wrappers@1.0.4 - @0x/sol-compiler@3.1.13 - @0x/sol-coverage@3.0.10 - @0x/sol-doc@2.0.17 - @0x/sol-profiler@3.1.12 - @0x/sol-trace@2.0.18 - @0x/sol-tracing-utils@6.0.17 - @0x/sra-spec@2.0.15 - @0x/subproviders@5.0.2 - @0x/testnet-faucets@1.0.85 - @0x/web3-wrapper@6.0.11 - @0x/website@0.0.88
Updated CHANGELOGS
2019-08-22 14:13:00 +10:00 · 2019-08-22 14:12:40 +10:00 · 2019-08-21 18:39:07 -07:00 · 2019-08-21 14:54:17 -07:00 · 2019-08-21 14:30:55 -07:00 · 2019-08-21 14:30:55 -07:00
366 changed files with 10706 additions and 6066 deletions
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,18 +4,23 @@ jobs:
    build:
        resource_class: medium+
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        environment:
            CONTRACTS_COMMIT_HASH: '9ed05f5'
        working_directory: ~/repo
        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:$PATH' >> /home/circleci/.bashrc
+            # HACK(feuGeneA): commented out this hack as we're changing
+            # from a circleci-maintained container to a different
+            # container, and this hack may not apply anymore, as
+            # suggested by the non-existance of `/home/circleci/.bashrc`
+            # when running the command below.
+            # - run:
+            #       # HACK(albrow): Without this, yarn commands will sometimes
+            #       # fail with a "permission denied" error.
+            #       name: Set npm path
+            #       command: npm set prefix=/home/circleci/npm && echo 'export PATH=$HOME/circleci/npm/bin:$PATH' >> /home/circleci/.bashrc
            - run:
                  name: install-yarn
                  command: npm install --global yarn@1.9.4
@@ -42,7 +47,7 @@ jobs:
    build-website:
        resource_class: medium+
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        working_directory: ~/repo
        steps:
            - restore_cache:
@@ -50,8 +55,9 @@ jobs:
                      - repo-{{ .Environment.CIRCLE_SHA1 }}
            - run: cd packages/website && yarn build:prod
    test-contracts-ganache:
+        resource_class: medium+
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        working_directory: ~/repo
        steps:
            - restore_cache:
@@ -60,7 +66,7 @@ jobs:
            - run: yarn wsrun test:circleci @0x/contracts-multisig @0x/contracts-utils @0x/contracts-exchange-libs @0x/contracts-erc20 @0x/contracts-erc721 @0x/contracts-erc1155 @0x/contracts-extensions @0x/contracts-asset-proxy @0x/contracts-exchange @0x/contracts-exchange-forwarder @0x/contracts-coordinator @0x/contracts-dev-utils
    test-contracts-geth:
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
            - image: 0xorg/devnet
        working_directory: ~/repo
        steps:
@@ -73,7 +79,7 @@ jobs:
    test-publish:
        resource_class: medium+
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
            - image: 0xorg/verdaccio
        working_directory: ~/repo
        steps:
@@ -83,7 +89,7 @@ jobs:
            - run: yarn test:publish:circleci
    test-doc-generation:
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        working_directory: ~/repo
        steps:
            - restore_cache:
@@ -92,7 +98,7 @@ jobs:
            - run: yarn test:generate_docs:circleci
    test-rest:
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        working_directory: ~/repo
        steps:
            - restore_cache:
@@ -109,7 +115,6 @@ jobs:
            - run: yarn wsrun test:circleci @0x/dev-utils
            - run: yarn wsrun test:circleci @0x/json-schemas
            - run: yarn wsrun test:circleci @0x/order-utils
-            - run: yarn wsrun test:circleci @0x/order-watcher
            - run: yarn wsrun test:circleci @0x/sol-compiler
            - run: yarn wsrun test:circleci @0x/sol-tracing-utils
            - run: yarn wsrun test:circleci @0x/sol-doc
@@ -153,10 +158,6 @@ jobs:
                  key: coverage-order-utils-{{ .Environment.CIRCLE_SHA1 }}
                  paths:
                      - ~/repo/packages/order-utils/coverage/lcov.info
-            - save_cache:
-                  key: coverage-order-watcher-{{ .Environment.CIRCLE_SHA1 }}
-                  paths:
-                      - ~/repo/packages/order-watcher/coverage/lcov.info
            - save_cache:
                  key: coverage-sol-compiler-{{ .Environment.CIRCLE_SHA1 }}
                  paths:
@@ -180,7 +181,7 @@ jobs:
    test-python:
        working_directory: ~/repo
        docker:
-            - image: circleci/python
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
            - image: 0xorg/ganache-cli:2.2.2
            - image: 0xorg/launch-kit-backend:74bcc39
              environment:
@@ -191,8 +192,6 @@ jobs:
                  sh -c "until printf 'POST /\r\nContent-Length: 26\r\n\r\n{\"method\":\"net_listening\"}' | nc localhost 8545 | grep true; do continue; done; node_modules/.bin/forever ts/lib/index.js"
        steps:
            - checkout
-            - run: sudo chown -R circleci:circleci /usr/local/bin
-            - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7
            - restore_cache:
                  key: installed-py-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
            - restore_cache:
@@ -258,11 +257,9 @@ jobs:
    test-rest-python:
        working_directory: ~/repo
        docker:
-            - image: circleci/python
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        steps:
            - checkout
-            - run: sudo chown -R circleci:circleci /usr/local/bin
-            - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7
            - restore_cache:
                  key: installed-py-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
            - run:
@@ -286,11 +283,9 @@ jobs:
    static-tests-python:
        working_directory: ~/repo
        docker:
-            - image: circleci/python
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        steps:
            - checkout
-            - run: sudo chown -R circleci:circleci /usr/local/bin
-            - run: sudo chown -R circleci:circleci /usr/local/lib/python3.7
            - restore_cache:
                  key: installed-py-{{ .Branch }}-{{ .Environment.CIRCLE_SHA1 }}
            - restore_cache:
@@ -305,7 +300,7 @@ jobs:
    static-tests:
        working_directory: ~/repo
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        steps:
            - restore_cache:
                  keys:
@@ -317,7 +312,7 @@ jobs:
            - run: yarn bundlewatch
    submit-coverage:
        docker:
-            - image: circleci/node:9-browsers
+            - image: nikolaik/python-nodejs:python3.7-nodejs8
        working_directory: ~/repo
        steps:
            - restore_cache:
@@ -350,9 +345,6 @@ jobs:
            - restore_cache:
                  keys:
                      - coverage-order-utils-{{ .Environment.CIRCLE_SHA1 }}
-            - restore_cache:
-                  keys:
-                      - coverage-order-watcher-{{ .Environment.CIRCLE_SHA1 }}
            - restore_cache:
                  keys:
                      - coverage-sol-compiler-{{ .Environment.CIRCLE_SHA1 }}
--- a/.github/autolabeler.yml
+++ b/.github/autolabeler.yml
@@ -21,7 +21,6 @@ contracts: ['contracts']
@0x/utils: ['packages/utils']
@0x/tslint-config: ['packages/tslint-config']
@0x/asset-buyer: ['packages/asset-buyer']
-@0x/order-watcher: ['packages/order-watcher']
@0x/order-utils: ['packages/order-utils']
@0x/assert: ['packages/assert']
@0x/base-contract: ['packages/base-contract']
--- a/.gitignore
+++ b/.gitignore
@@ -133,9 +133,6 @@ python-packages/contract_wrappers/src/zero_ex/contract_wrappers/order_validator/
 python-packages/contract_wrappers/src/zero_ex/contract_wrappers/weth9/__init__.py
 python-packages/contract_wrappers/src/zero_ex/contract_wrappers/zrx_token/__init__.py

-# cli test output
-packages/abi-gen/test-cli/output
-
 # solc-bin in sol-compiler
 packages/sol-compiler/solc_bin/

--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ Visit our [developer portal](https://0xproject.com/docs/order-utils) for a compr
 | -------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------- |
 | [`0x-contract-addresses`](/python-packages/contract_addresses) | [![PyPI](https://img.shields.io/pypi/v/0x-contract-addresses.svg)](https://pypi.org/project/0x-contract-addresses/) | A tiny utility library for getting known deployed contract addresses for a particular network     |
 | [`0x-contract-artifacts`](/python-packages/contract_artifacts) | [![PyPI](https://img.shields.io/pypi/v/0x-contract-artifacts.svg)](https://pypi.org/project/0x-contract-artifacts/) | 0x smart contract compilation artifacts                                                           |
+| [`0x-contract-wrappers`](/python-packages/contract_wrappers)   | [![PyPI](https://img.shields.io/pypi/v/0x-contract-wrappers.svg)](https://pypi.org/project/0x-contract-wrappers/)   | 0x smart contract wrappers                                                                        |
 | [`0x-json-schemas`](/python-packages/json_schemas)             | [![PyPI](https://img.shields.io/pypi/v/0x-json-schemas.svg)](https://pypi.org/project/0x-json-schemas/)             | 0x-related JSON schemas                                                                           |
 | [`0x-order-utils`](/python-packages/order_utils)               | [![PyPI](https://img.shields.io/pypi/v/0x-order-utils.svg)](https://pypi.org/project/0x-order-utils/)               | A set of utilities for generating, parsing, signing and validating 0x orders                      |
 | [`0x-sra-client`](/python-packages/sra_client)                 | [![PyPI](https://img.shields.io/pypi/v/0x-sra-client.svg)](https://pypi.org/project/0x-sra-client/)                 | A Python client for interacting with servers conforming to the Standard Relayer API specification |
@@ -62,8 +63,7 @@ These packages are all under development. See [/contracts/README.md](/contracts/
 | [`@0x/contract-addresses`](/packages/contract-addresses) | [![npm](https://img.shields.io/npm/v/@0x/contract-addresses.svg)](https://www.npmjs.com/package/@0x/contract-addresses) | A tiny utility library for getting known deployed contract addresses for a particular network.    |
 | [`@0x/contract-wrappers`](/packages/contract-wrappers)   | [![npm](https://img.shields.io/npm/v/@0x/contract-wrappers.svg)](https://www.npmjs.com/package/@0x/contract-wrappers)   | JS/TS wrappers for interacting with the 0x smart contracts                                        |
 | [`@0x/order-utils`](/packages/order-utils)               | [![npm](https://img.shields.io/npm/v/@0x/order-utils.svg)](https://www.npmjs.com/package/@0x/order-utils)               | A set of utilities for generating, parsing, signing and validating 0x orders                      |
-| [`@0x/json-schemas`](/packages/json-schemas)             | [![npm](https://img.shields.io/npm/v/@0x/json-schemas.svg)](https://www.npmjs.com/package/@0x/json-schemas)             | 0x-related JSON schemas                                                                           |
-| [`@0x/order-watcher`](/packages/order-watcher)           | [![npm](https://img.shields.io/npm/v/@0x/order-watcher.svg)](https://www.npmjs.com/package/@0x/order-watcher)           | An order watcher daemon that watches for order validity                                           |
+| [`@0x/json-schemas`](/packages/json-schemas)             | [![npm](https://img.shields.io/npm/v/@0x/json-schemas.svg)](https://www.npmjs.com/package/@0x/json-schemas)             | 0x-related JSON schemas                                                                           |  |
 | [`@0x/migrations`](/packages/migrations)                 | [![npm](https://img.shields.io/npm/v/@0x/migrations.svg)](https://www.npmjs.com/package/@0x/migrations)                 | Migration tool for deploying 0x smart contracts on private testnets                               |
 | [`@0x/contract-artifacts`](/packages/contract-artifacts) | [![npm](https://img.shields.io/npm/v/@0x/contract-artifacts.svg)](https://www.npmjs.com/package/@0x/contract-artifacts) | 0x smart contract compilation artifacts                                                           |
 | [`@0x/abi-gen-wrappers`](/packages/abi-gen-wrappers)     | [![npm](https://img.shields.io/npm/v/@0x/abi-gen-wrappers.svg)](https://www.npmjs.com/package/@0x/abi-gen-wrappers)     | Low-level 0x smart contract wrappers generated using `@0x/abi-gen`                                |
@@ -109,7 +109,7 @@ These packages are all under development. See [/contracts/README.md](/contracts/

 ## Usage

-Node version >= 6.12 is required.
+Node version 6.x or 8.x is required.

 Most of the packages require additional typings for external dependencies.
 You can include those by prepending the `@0x/typescript-typings` package to your [`typeRoots`](http://www.typescriptlang.org/docs/handbook/tsconfig-json.html) config.
@@ -138,6 +138,8 @@ Then install dependencies
 yarn install
 ```

+You will also need to have Python 3 installed, in order to build and run the tests of `abi-gen`'s command-line interface, which is integrated with the yarn build, yarn test, and yarn lint commands described below. More specifically, your local pip should resolve to the Python 3 version of pip, not a Python 2.x version.
+
 ### Build

 To build all packages:
--- a/contracts/asset-proxy/CHANGELOG.json
+++ b/contracts/asset-proxy/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.2.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.2.5",
--- a/contracts/asset-proxy/CHANGELOG.md
+++ b/contracts/asset-proxy/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.2.6 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.2.5 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/asset-proxy/package.json
+++ b/contracts/asset-proxy/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-asset-proxy",
-    "version": "2.2.5",
+    "version": "2.2.6",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,16 +69,16 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-erc1155": "^1.1.12",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-erc721": "^2.1.12",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-erc1155": "^1.1.13",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-erc721": "^2.1.13",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "ethereumjs-util": "^5.1.1",
        "lodash": "^4.17.11"
--- a/contracts/coordinator/CHANGELOG.json
+++ b/contracts/coordinator/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.0.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.0.10",
--- a/contracts/coordinator/CHANGELOG.md
+++ b/contracts/coordinator/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.0.11 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.0.10 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/coordinator/package.json
+++ b/contracts/coordinator/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-coordinator",
-    "version": "2.0.10",
+    "version": "2.0.11",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,17 +69,17 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-exchange": "^2.1.11",
-        "@0x/contracts-exchange-libs": "^3.0.5",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-exchange": "^2.1.12",
+        "@0x/contracts-exchange-libs": "^3.0.6",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "ethereumjs-util": "^5.1.1",
        "lodash": "^4.17.11"
--- a/contracts/dev-utils/CHANGELOG.json
+++ b/contracts/dev-utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "0.0.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "0.0.7",
--- a/contracts/dev-utils/CHANGELOG.md
+++ b/contracts/dev-utils/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v0.0.8 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v0.0.7 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/dev-utils/package.json
+++ b/contracts/dev-utils/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-dev-utils",
-    "version": "0.0.7",
+    "version": "0.0.8",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/dev-utils/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,19 +69,19 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc1155": "^1.1.12",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-erc721": "^2.1.12",
-        "@0x/contracts-exchange": "^2.1.11",
-        "@0x/contracts-exchange-libs": "^3.0.5",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc1155": "^1.1.13",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-erc721": "^2.1.13",
+        "@0x/contracts-exchange": "^2.1.12",
+        "@0x/contracts-exchange-libs": "^3.0.6",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "ethereumjs-util": "^5.1.1"
    },
--- a/contracts/erc1155/CHANGELOG.json
+++ b/contracts/erc1155/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "1.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "1.1.12",
--- a/contracts/erc1155/CHANGELOG.md
+++ b/contracts/erc1155/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v1.1.13 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v1.1.12 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/erc1155/package.json
+++ b/contracts/erc1155/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-erc1155",
-    "version": "1.1.12",
+    "version": "1.1.13",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,10 +47,10 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -68,13 +68,13 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/contracts-utils": "^3.2.1",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/contracts-utils": "^3.2.2",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/erc20/CHANGELOG.json
+++ b/contracts/erc20/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.2.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.2.11",
--- a/contracts/erc20/CHANGELOG.md
+++ b/contracts/erc20/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.2.12 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.2.11 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/erc20/package.json
+++ b/contracts/erc20/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-erc20",
-    "version": "2.2.11",
+    "version": "2.2.12",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,12 +69,12 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-utils": "^3.2.1",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-utils": "^3.2.2",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/erc721/CHANGELOG.json
+++ b/contracts/erc721/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.1.12",
--- a/contracts/erc721/CHANGELOG.md
+++ b/contracts/erc721/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.1.13 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.1.12 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/erc721/package.json
+++ b/contracts/erc721/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-erc721",
-    "version": "2.1.12",
+    "version": "2.1.13",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/tokens/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,12 +69,12 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-utils": "^3.2.1",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-utils": "^3.2.2",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/exchange-forwarder/CHANGELOG.json
+++ b/contracts/exchange-forwarder/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "3.0.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "3.0.9",
--- a/contracts/exchange-forwarder/CHANGELOG.md
+++ b/contracts/exchange-forwarder/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v3.0.10 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v3.0.9 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/exchange-forwarder/package.json
+++ b/contracts/exchange-forwarder/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-exchange-forwarder",
-    "version": "3.0.9",
+    "version": "3.0.10",
    "engines": {
        "node": ">=6.12"
    },
@@ -46,11 +46,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -68,18 +68,18 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-erc721": "^2.1.12",
-        "@0x/contracts-exchange": "^2.1.11",
-        "@0x/contracts-exchange-libs": "^3.0.5",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-erc721": "^2.1.13",
+        "@0x/contracts-exchange": "^2.1.12",
+        "@0x/contracts-exchange-libs": "^3.0.6",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/exchange-libs/CHANGELOG.json
+++ b/contracts/exchange-libs/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "3.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "3.0.5",
--- a/contracts/exchange-libs/CHANGELOG.md
+++ b/contracts/exchange-libs/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v3.0.6 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v3.0.5 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/exchange-libs/package.json
+++ b/contracts/exchange-libs/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-exchange-libs",
-    "version": "3.0.5",
+    "version": "3.0.6",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/libs/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,13 +69,13 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/exchange/CHANGELOG.json
+++ b/contracts/exchange/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.1.11",
--- a/contracts/exchange/CHANGELOG.md
+++ b/contracts/exchange/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.1.12 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.1.11 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/exchange/contracts/examples/Validator.sol
+++ b/contracts/exchange/contracts/examples/Validator.sol
@@ -21,7 +21,7 @@ pragma solidity ^0.5.5;
 import "../src/interfaces/IValidator.sol";


-contract Validator is 
+contract Validator is
    IValidator
 {

@@ -39,7 +39,7 @@ contract Validator is
    /// @param hash Message hash that is signed.
    /// @param signerAddress Address that should have signed the given hash.
    /// @param signature Proof of signing.
-    /// @return Validity of signature.
+    /// @return Returns a known magic value if the signature is valid.
    // solhint-disable no-unused-vars
    function isValidSignature(
        bytes32 hash,
@@ -48,9 +48,11 @@ contract Validator is
    )
        external
        view
-        returns (bool isValid)
+        returns (bytes4)
    {
-        return (signerAddress == VALID_SIGNER);
+        require(signerAddress == VALID_SIGNER, "INVALID_SIGNER");
+        bytes4 magicValue = bytes4(keccak256("isValidValidatorSignature(address,bytes32,address,bytes)"));
+        return magicValue;
    }
    // solhint-enable no-unused-vars
 }
--- a/contracts/exchange/contracts/examples/Wallet.sol
+++ b/contracts/exchange/contracts/examples/Wallet.sol
@@ -22,7 +22,7 @@ import "../src/interfaces/IWallet.sol";
 import "@0x/contracts-utils/contracts/src/LibBytes.sol";


-contract Wallet is 
+contract Wallet is
    IWallet
 {
    using LibBytes for bytes;
@@ -41,14 +41,14 @@ contract Wallet is
    ///      The signer must match the owner of this wallet.
    /// @param hash Message hash that is signed.
    /// @param eip712Signature Proof of signing.
-    /// @return Validity of signature.
+    /// @return Returns a known magic value if the signature is valid.
    function isValidSignature(
        bytes32 hash,
        bytes calldata eip712Signature
    )
        external
        view
-        returns (bool isValid)
+        returns (bytes4)
    {
        require(
            eip712Signature.length == 65,
@@ -59,7 +59,8 @@ contract Wallet is
        bytes32 r = eip712Signature.readBytes32(1);
        bytes32 s = eip712Signature.readBytes32(33);
        address recoveredAddress = ecrecover(hash, v, r, s);
-        isValid = WALLET_OWNER == recoveredAddress;
-        return isValid;
+        require(WALLET_OWNER == recoveredAddress, "INVALID_SIGNATURE");
+        bytes4 magicValue = bytes4(keccak256("isValidWalletSignature(bytes32,address,bytes)"));
+        return magicValue;
    }
 }
--- a/contracts/exchange/contracts/examples/Whitelist.sol
+++ b/contracts/exchange/contracts/examples/Whitelist.sol
@@ -73,10 +73,12 @@ contract Whitelist is
    )
        external
        view
-        returns (bool isValid)
+        returns (bytes4)
    {
        // solhint-disable-next-line avoid-tx-origin
-        return signerAddress == tx.origin;
+        require(signerAddress == tx.origin, "INVALID_SIGNER");
+        bytes4 magicValue = bytes4(keccak256("isValidValidatorSignature(address,bytes32,address,bytes)"));
+        return magicValue;
    }
    // solhint-enable no-unused-vars

--- a/contracts/exchange/contracts/src/MixinSignatureValidator.sol
+++ b/contracts/exchange/contracts/src/MixinSignatureValidator.sol
@@ -32,7 +32,7 @@ contract MixinSignatureValidator is
    MTransactions
 {
    using LibBytes for bytes;
-    
+
    // Mapping of hash => signer => signed
    mapping (bytes32 => mapping (address => bool)) public preSigned;

@@ -197,7 +197,7 @@ contract MixinSignatureValidator is
        } else if (signatureType == SignatureType.Validator) {
            // Pop last 20 bytes off of signature byte array.
            address validatorAddress = signature.popLast20Bytes();
-            
+
            // Ensure signer has approved validator.
            if (!allowedValidators[signerAddress][validatorAddress]) {
                return false;
@@ -224,7 +224,8 @@ contract MixinSignatureValidator is
        revert("SIGNATURE_UNSUPPORTED");
    }

-    /// @dev Verifies signature using logic defined by Wallet contract.
+    /// @dev Verifies signature using logic defined by Wallet contract. Wallet contract
+    ///      must return `bytes4(keccak256("isValidWalletSignature(bytes32,address,bytes)"))`
    /// @param hash Any 32 byte hash.
    /// @param walletAddress Address that should have signed the given hash
    ///                      and defines its own signature verification method.
@@ -244,7 +245,19 @@ contract MixinSignatureValidator is
            hash,
            signature
        );
+        // bytes4 0xb0671381
+        bytes32 magicValue = bytes32(bytes4(keccak256("isValidWalletSignature(bytes32,address,bytes)")));
        assembly {
+            // extcodesize added as an extra safety measure
+            if iszero(extcodesize(walletAddress)) {
+                // Revert with `Error("WALLET_ERROR")`
+                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                mstore(64, 0x0000000c57414c4c45545f4552524f5200000000000000000000000000000000)
+                mstore(96, 0)
+                revert(0, 100)
+            }
+
            let cdStart := add(callData, 32)
            let success := staticcall(
                gas,              // forward all gas
@@ -255,6 +268,15 @@ contract MixinSignatureValidator is
                32                // output size is 32 bytes
            )

+            if iszero(eq(returndatasize(), 32)) {
+                // Revert with `Error("WALLET_ERROR")`
+                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                mstore(64, 0x0000000c57414c4c45545f4552524f5200000000000000000000000000000000)
+                mstore(96, 0)
+                revert(0, 100)
+            }
+
            switch success
            case 0 {
                // Revert with `Error("WALLET_ERROR")`
@@ -266,13 +288,17 @@ contract MixinSignatureValidator is
            }
            case 1 {
                // Signature is valid if call did not revert and returned true
-                isValid := mload(cdStart)
+                isValid := eq(
+                    and(mload(cdStart), 0xffffffff00000000000000000000000000000000000000000000000000000000),
+                    and(magicValue, 0xffffffff00000000000000000000000000000000000000000000000000000000)
+                )
            }
        }
        return isValid;
    }

    /// @dev Verifies signature using logic defined by Validator contract.
+    ///      Validator must return `bytes4(keccak256("isValidValidatorSignature(address,bytes32,address,bytes)"))`
    /// @param validatorAddress Address of validator contract.
    /// @param hash Any 32 byte hash.
    /// @param signerAddress Address that should have signed the given hash.
@@ -294,7 +320,19 @@ contract MixinSignatureValidator is
            signerAddress,
            signature
        );
+        // bytes4 0x42b38674
+        bytes32 magicValue = bytes32(bytes4(keccak256("isValidValidatorSignature(address,bytes32,address,bytes)")));
        assembly {
+            // extcodesize added as an extra safety measure
+            if iszero(extcodesize(validatorAddress)) {
+                // Revert with `Error("VALIDATOR_ERROR")`
+                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                mstore(64, 0x0000000f56414c494441544f525f4552524f5200000000000000000000000000)
+                mstore(96, 0)
+                revert(0, 100)
+            }
+
            let cdStart := add(callData, 32)
            let success := staticcall(
                gas,               // forward all gas
@@ -305,6 +343,15 @@ contract MixinSignatureValidator is
                32                 // output size is 32 bytes
            )

+            if iszero(eq(returndatasize(), 32)) {
+                // Revert with `Error("VALIDATOR_ERROR")`
+                mstore(0, 0x08c379a000000000000000000000000000000000000000000000000000000000)
+                mstore(32, 0x0000002000000000000000000000000000000000000000000000000000000000)
+                mstore(64, 0x0000000f56414c494441544f525f4552524f5200000000000000000000000000)
+                mstore(96, 0)
+                revert(0, 100)
+            }
+
            switch success
            case 0 {
                // Revert with `Error("VALIDATOR_ERROR")`
@@ -316,7 +363,10 @@ contract MixinSignatureValidator is
            }
            case 1 {
                // Signature is valid if call did not revert and returned true
-                isValid := mload(cdStart)
+                isValid := eq(
+                    and(mload(cdStart), 0xffffffff00000000000000000000000000000000000000000000000000000000),
+                    and(magicValue, 0xffffffff00000000000000000000000000000000000000000000000000000000)
+                )
            }
        }
        return isValid;
--- a/contracts/exchange/contracts/src/interfaces/IValidator.sol
+++ b/contracts/exchange/contracts/src/interfaces/IValidator.sol
@@ -25,7 +25,8 @@ contract IValidator {
    /// @param hash Message hash that is signed.
    /// @param signerAddress Address that should have signed the given hash.
    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
+    /// @return Magic bytes4 value if the signature is valid.
+    ///         Magic value is bytes4(keccak256("isValidValidatorSignature(address,bytes32,address,bytes)"))
    function isValidSignature(
        bytes32 hash,
        address signerAddress,
@@ -33,5 +34,5 @@ contract IValidator {
    )
        external
        view
-        returns (bool isValid);
+        returns (bytes4);
 }
--- a/contracts/exchange/contracts/src/interfaces/IWallet.sol
+++ b/contracts/exchange/contracts/src/interfaces/IWallet.sol
@@ -24,12 +24,13 @@ contract IWallet {
    /// @dev Verifies that a signature is valid.
    /// @param hash Message hash that is signed.
    /// @param signature Proof of signing.
-    /// @return Validity of order signature.
+    /// @return Magic bytes4 value if the signature is valid.
+    ///         Magic value is bytes4(keccak256("isValidWalletSignature(bytes32,address,bytes)"))
    function isValidSignature(
        bytes32 hash,
        bytes calldata signature
    )
        external
        view
-        returns (bool isValid);
+        returns (bytes4);
 }
--- a/contracts/exchange/package.json
+++ b/contracts/exchange/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-exchange",
-    "version": "2.1.11",
+    "version": "2.1.12",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,18 +69,18 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc1155": "^1.1.12",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-erc721": "^2.1.12",
-        "@0x/contracts-exchange-libs": "^3.0.5",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc1155": "^1.1.13",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-erc721": "^2.1.13",
+        "@0x/contracts-exchange-libs": "^3.0.6",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "ethereumjs-util": "^5.1.1",
        "lodash": "^4.17.11"
--- a/contracts/exchange/test/signature_validator.ts
+++ b/contracts/exchange/test/signature_validator.ts
@@ -100,6 +100,12 @@ describe('MixinSignatureValidator', () => {
            ),
            constants.AWAIT_TRANSACTION_MINED_MS,
        );
+        await web3Wrapper.awaitTransactionSuccessAsync(
+            await signatureValidator.setSignatureValidatorApproval.sendTransactionAsync(testValidator.address, true, {
+                from: notSignerAddress,
+            }),
+            constants.AWAIT_TRANSACTION_MINED_MS,
+        );

        const defaultOrderParams = {
            ...constants.STATIC_ORDER_PARAMS,
@@ -307,7 +313,7 @@ describe('MixinSignatureValidator', () => {
            expect(isValidSignature).to.be.true();
        });

-        it('should return false when SignatureType=Wallet and signature is invalid', async () => {
+        it('should revert when SignatureType=Wallet and signature is invalid', async () => {
            // Create EIP712 signature using a private key that does not belong to the wallet owner.
            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
            const orderHashBuffer = ethUtil.toBuffer(orderHashHex);
@@ -322,12 +328,10 @@ describe('MixinSignatureValidator', () => {
            ]);
            const signatureHex = ethUtil.bufferToHex(signature);
            // Validate signature
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                testWallet.address,
-                signatureHex,
+            return expectContractCallFailedAsync(
+                signatureValidator.publicIsValidSignature.callAsync(orderHashHex, testWallet.address, signatureHex),
+                RevertReason.WalletError,
            );
-            expect(isValidSignature).to.be.false();
        });

        it('should revert when `isValidSignature` attempts to update state and SignatureType=Wallet', async () => {
@@ -365,6 +369,15 @@ describe('MixinSignatureValidator', () => {
                signatureHex,
            );
            expect(isValidSignature).to.be.true();
+
+            const isValidSignatureTs = await signatureUtils.isValidSignatureAsync(
+                provider,
+                orderHashHex,
+                signatureHex,
+                signerAddress,
+                signatureValidator.address,
+            );
+            expect(isValidSignatureTs).to.be.true();
        });

        it('should return false when SignatureType=Validator, signature is invalid and validator is approved', async () => {
@@ -375,12 +388,19 @@ describe('MixinSignatureValidator', () => {
            const orderHashHex = orderHashUtils.getOrderHashHex(signedOrder);
            // This will return false because we signed the message with `signerAddress`, but
            // are validating against `notSignerAddress`
-            const isValidSignature = await signatureValidator.publicIsValidSignature.callAsync(
-                orderHashHex,
-                notSignerAddress,
-                signatureHex,
+            await expectContractCallFailedAsync(
+                signatureValidator.publicIsValidSignature.callAsync(orderHashHex, notSignerAddress, signatureHex),
+                RevertReason.ValidatorError,
            );
-            expect(isValidSignature).to.be.false();
+
+            const isValidSignatureTs = await signatureUtils.isValidSignatureAsync(
+                provider,
+                orderHashHex,
+                signatureHex,
+                notSignerAddress,
+                signatureValidator.address,
+            );
+            expect(isValidSignatureTs).to.be.false();
        });

        it('should revert when `isValidSignature` attempts to update state and SignatureType=Validator', async () => {
@@ -416,6 +436,16 @@ describe('MixinSignatureValidator', () => {
                signatureHex,
            );
            expect(isValidSignature).to.be.false();
+
+            expect(
+                signatureUtils.isValidSignatureAsync(
+                    provider,
+                    orderHashHex,
+                    signatureHex,
+                    signerAddress,
+                    signatureValidator.address,
+                ),
+            ).to.be.rejected();
        });

        it('should return true when SignatureType=Presigned and signer has presigned hash', async () => {
--- a/contracts/extensions/CHANGELOG.json
+++ b/contracts/extensions/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "4.0.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "4.0.5",
--- a/contracts/extensions/CHANGELOG.md
+++ b/contracts/extensions/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v4.0.6 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v4.0.5 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/extensions/package.json
+++ b/contracts/extensions/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-extensions",
-    "version": "4.0.5",
+    "version": "4.0.6",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,12 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
-        "@0x/contract-wrappers": "9.1.7",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -70,18 +69,18 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc20": "^2.2.11",
-        "@0x/contracts-erc721": "^2.1.12",
-        "@0x/contracts-exchange": "^2.1.11",
-        "@0x/contracts-exchange-libs": "^3.0.5",
-        "@0x/contracts-utils": "^3.2.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc20": "^2.2.12",
+        "@0x/contracts-erc721": "^2.1.13",
+        "@0x/contracts-exchange": "^2.1.12",
+        "@0x/contracts-exchange-libs": "^3.0.6",
+        "@0x/contracts-utils": "^3.2.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/extensions/test/dutch_auction.ts
+++ b/contracts/extensions/test/dutch_auction.ts
@@ -1,4 +1,3 @@
-import { DutchAuctionWrapper } from '@0x/contract-wrappers';
 import { ERC20Wrapper, ERC721Wrapper } from '@0x/contracts-asset-proxy';
 import { DummyERC20TokenContract } from '@0x/contracts-erc20';
 import { DummyERC721TokenContract } from '@0x/contracts-erc721';
@@ -151,7 +150,7 @@ describe(ContractName.DutchAuction, () => {
            feeRecipientAddress,
            // taker address or sender address should be set to the ducth auction contract
            takerAddress: dutchAuctionContract.address,
-            makerAssetData: DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            makerAssetData: assetDataUtils.encodeDutchAuctionAssetData(
                assetDataUtils.encodeERC20AssetData(defaultMakerAssetAddress),
                auctionBeginTimeSeconds,
                auctionBeginAmount,
@@ -193,7 +192,7 @@ describe(ContractName.DutchAuction, () => {
    describe('matchOrders', () => {
        it('should be worth the begin price at the begining of the auction', async () => {
            auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp + 2);
-            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            const makerAssetData = assetDataUtils.encodeDutchAuctionAssetData(
                defaultERC20MakerAssetData,
                auctionBeginTimeSeconds,
                auctionBeginAmount,
@@ -207,7 +206,7 @@ describe(ContractName.DutchAuction, () => {
        it('should be be worth the end price at the end of the auction', async () => {
            auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds * 2);
            auctionEndTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds);
-            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            const makerAssetData = assetDataUtils.encodeDutchAuctionAssetData(
                defaultERC20MakerAssetData,
                auctionBeginTimeSeconds,
                auctionBeginAmount,
@@ -273,7 +272,7 @@ describe(ContractName.DutchAuction, () => {
        it('should revert when auction expires', async () => {
            auctionBeginTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds * 2);
            auctionEndTimeSeconds = new BigNumber(currentBlockTimestamp - tenMinutesInSeconds);
-            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            const makerAssetData = assetDataUtils.encodeDutchAuctionAssetData(
                defaultERC20MakerAssetData,
                auctionBeginTimeSeconds,
                auctionBeginAmount,
@@ -307,7 +306,7 @@ describe(ContractName.DutchAuction, () => {
        });
        it('begin time is less than end time', async () => {
            auctionBeginTimeSeconds = new BigNumber(auctionEndTimeSeconds).plus(tenMinutesInSeconds);
-            const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+            const makerAssetData = assetDataUtils.encodeDutchAuctionAssetData(
                defaultERC20MakerAssetData,
                auctionBeginTimeSeconds,
                auctionBeginAmount,
@@ -335,7 +334,7 @@ describe(ContractName.DutchAuction, () => {
            it('should match orders when ERC721', async () => {
                const makerAssetId = erc721MakerAssetIds[0];
                const erc721MakerAssetData = assetDataUtils.encodeERC721AssetData(erc721Token.address, makerAssetId);
-                const makerAssetData = DutchAuctionWrapper.encodeDutchAuctionAssetData(
+                const makerAssetData = assetDataUtils.encodeDutchAuctionAssetData(
                    erc721MakerAssetData,
                    auctionBeginTimeSeconds,
                    auctionBeginAmount,
--- a/contracts/multisig/CHANGELOG.json
+++ b/contracts/multisig/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "3.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "3.1.11",
--- a/contracts/multisig/CHANGELOG.md
+++ b/contracts/multisig/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v3.1.12 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v3.1.11 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/multisig/package.json
+++ b/contracts/multisig/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-multisig",
-    "version": "3.1.11",
+    "version": "3.1.12",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/multisig/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -69,14 +69,14 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contracts-asset-proxy": "^2.2.5",
-        "@0x/contracts-erc20": "^2.2.11",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contracts-asset-proxy": "^2.2.6",
+        "@0x/contracts-erc20": "^2.2.12",
        "@0x/contracts-utils": "2.0.1",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "lodash": "^4.17.11"
    },
--- a/contracts/test-utils/CHANGELOG.json
+++ b/contracts/test-utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "3.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "3.1.13",
--- a/contracts/test-utils/CHANGELOG.md
+++ b/contracts/test-utils/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v3.1.14 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v3.1.13 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/test-utils/package.json
+++ b/contracts/test-utils/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-test-utils",
-    "version": "3.1.13",
+    "version": "3.1.14",
    "engines": {
        "node": ">=6.12"
    },
@@ -42,18 +42,18 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/order-utils": "^8.2.5",
-        "@0x/sol-compiler": "^3.1.12",
-        "@0x/sol-coverage": "^3.0.9",
-        "@0x/sol-profiler": "^3.1.11",
-        "@0x/sol-trace": "^2.0.17",
-        "@0x/subproviders": "^5.0.1",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/order-utils": "^8.3.0",
+        "@0x/sol-compiler": "^3.1.13",
+        "@0x/sol-coverage": "^3.0.10",
+        "@0x/sol-profiler": "^3.1.12",
+        "@0x/sol-trace": "^2.0.18",
+        "@0x/subproviders": "^5.0.2",
        "@0x/tslint-config": "^3.0.1",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "@types/bn.js": "^4.11.0",
        "@types/js-combinatorics": "^0.5.29",
        "@types/lodash": "4.14.104",
--- a/contracts/utils/CHANGELOG.json
+++ b/contracts/utils/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "3.2.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "3.2.1",
--- a/contracts/utils/CHANGELOG.md
+++ b/contracts/utils/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v3.2.2 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v3.2.1 - _August 8, 2019_

    * Dependencies updated
--- a/contracts/utils/package.json
+++ b/contracts/utils/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/contracts-utils",
-    "version": "3.2.1",
+    "version": "3.2.2",
    "engines": {
        "node": ">=6.12"
    },
@@ -47,11 +47,11 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/utils/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
+        "@0x/abi-gen": "^4.1.1",
        "@0x/contracts-gen": "^1.0.13",
-        "@0x/contracts-test-utils": "^3.1.13",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/sol-compiler": "^3.1.12",
+        "@0x/contracts-test-utils": "^3.1.14",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/sol-compiler": "^3.1.13",
        "@0x/tslint-config": "^3.0.1",
        "@types/bn.js": "^4.11.0",
        "@types/lodash": "4.14.104",
@@ -70,12 +70,12 @@
        "typescript": "3.0.1"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/order-utils": "^8.2.5",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/order-utils": "^8.3.0",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "bn.js": "^4.11.8",
        "ethereum-types": "^2.1.4",
        "ethereumjs-util": "^5.1.1",
--- a/env/.Python
+++ b/env/.Python
@@ -0,0 +1 @@
+/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/Python
--- a/env/bin/activate
+++ b/env/bin/activate
@@ -0,0 +1,84 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+
+if [ "${BASH_SOURCE-}" = "$0" ]; then
+    echo "You must source this script: \$ source $0" >&2
+    exit 33
+fi
+
+deactivate () {
+    unset -f pydoc >/dev/null 2>&1
+
+    # reset old environment variables
+    # ! [ -z ${VAR+_} ] returns true if VAR is declared at all
+    if ! [ -z "${_OLD_VIRTUAL_PATH:+_}" ] ; then
+        PATH="$_OLD_VIRTUAL_PATH"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if ! [ -z "${_OLD_VIRTUAL_PYTHONHOME+_}" ] ; then
+        PYTHONHOME="$_OLD_VIRTUAL_PYTHONHOME"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
+        hash -r 2>/dev/null
+    fi
+
+    if ! [ -z "${_OLD_VIRTUAL_PS1+_}" ] ; then
+        PS1="$_OLD_VIRTUAL_PS1"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    if [ ! "${1-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+if ! [ -z "${PYTHONHOME+_}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="$PYTHONHOME"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT-}" ] ; then
+    _OLD_VIRTUAL_PS1="${PS1-}"
+    if [ "x" != x ] ; then
+        PS1="${PS1-}"
+    else
+        PS1="(`basename \"$VIRTUAL_ENV\"`) ${PS1-}"
+    fi
+    export PS1
+fi
+
+# Make sure to unalias pydoc if it's already there
+alias pydoc 2>/dev/null >/dev/null && unalias pydoc || true
+
+pydoc () {
+    python -m pydoc "$@"
+}
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH-}" ] || [ -n "${ZSH_VERSION-}" ] ; then
+    hash -r 2>/dev/null
+fi
--- a/env/bin/activate.csh
+++ b/env/bin/activate.csh
@@ -0,0 +1,55 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+
+set newline='\
+'
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH:q" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT:q" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate && unalias pydoc'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env"
+
+set _OLD_VIRTUAL_PATH="$PATH:q"
+setenv PATH "$VIRTUAL_ENV:q/bin:$PATH:q"
+
+
+
+if ("" != "") then
+    set env_name = ""
+else
+    set env_name = '('"$VIRTUAL_ENV:t:q"') '
+endif
+
+if ( $?VIRTUAL_ENV_DISABLE_PROMPT ) then
+    if ( $VIRTUAL_ENV_DISABLE_PROMPT == "" ) then
+        set do_prompt = "1"
+    else
+        set do_prompt = "0"
+    endif
+else
+    set do_prompt = "1"
+endif
+
+if ( $do_prompt == "1" ) then
+    # Could be in a non-interactive environment,
+    # in which case, $prompt is undefined and we wouldn't
+    # care about the prompt anyway.
+    if ( $?prompt ) then
+        set _OLD_VIRTUAL_PROMPT="$prompt:q"
+        if ( "$prompt:q" =~ *"$newline:q"* ) then
+            :
+        else
+            set prompt = "$env_name:q$prompt:q"
+        endif
+    endif
+endif
+
+unset env_name
+unset do_prompt
+
+alias pydoc python -m pydoc
+
+rehash
--- a/env/bin/activate.fish
+++ b/env/bin/activate.fish
@@ -0,0 +1,102 @@
+# This file must be used using `source bin/activate.fish` *within a running fish ( http://fishshell.com ) session*.
+# Do not run it directly.
+
+function _bashify_path -d "Converts a fish path to something bash can recognize"
+    set fishy_path $argv
+    set bashy_path $fishy_path[1]
+    for path_part in $fishy_path[2..-1]
+        set bashy_path "$bashy_path:$path_part"
+    end
+    echo $bashy_path
+end
+
+function _fishify_path -d "Converts a bash path to something fish can recognize"
+    echo $argv | tr ':' '\n'
+end
+
+function deactivate -d 'Exit virtualenv mode and return to the normal environment.'
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        # https://github.com/fish-shell/fish-shell/issues/436 altered PATH handling
+        if test (echo $FISH_VERSION | tr "." "\n")[1] -lt 3
+            set -gx PATH (_fishify_path $_OLD_VIRTUAL_PATH)
+        else
+            set -gx PATH $_OLD_VIRTUAL_PATH
+        end
+        set -e _OLD_VIRTUAL_PATH
+    end
+
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+       and functions -q _old_fish_prompt
+        # Set an empty local `$fish_function_path` to allow the removal of `fish_prompt` using `functions -e`.
+        set -l fish_function_path
+
+        # Erase virtualenv's `fish_prompt` and restore the original.
+        functions -e fish_prompt
+        functions -c _old_fish_prompt fish_prompt
+        functions -e _old_fish_prompt
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+    end
+
+    set -e VIRTUAL_ENV
+
+    if test "$argv[1]" != 'nondestructive'
+        # Self-destruct!
+        functions -e pydoc
+        functions -e deactivate
+        functions -e _bashify_path
+        functions -e _fishify_path
+    end
+end
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env"
+
+# https://github.com/fish-shell/fish-shell/issues/436 altered PATH handling
+if test (echo $FISH_VERSION | tr "." "\n")[1] -lt 3
+   set -gx _OLD_VIRTUAL_PATH (_bashify_path $PATH)
+else
+    set -gx _OLD_VIRTUAL_PATH $PATH
+end
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# Unset `$PYTHONHOME` if set.
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+function pydoc
+    python -m pydoc $argv
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # Copy the current `fish_prompt` function as `_old_fish_prompt`.
+    functions -c fish_prompt _old_fish_prompt
+
+    function fish_prompt
+        # Save the current $status, for fish_prompts that display it.
+        set -l old_status $status
+
+        # Prompt override provided?
+        # If not, just prepend the environment name.
+        if test -n ""
+            printf '%s%s' "" (set_color normal)
+        else
+            printf '%s(%s) ' (set_color normal) (basename "$VIRTUAL_ENV")
+        end
+
+        # Restore the original $status
+        echo "exit $old_status" | source
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+end
--- a/env/bin/activate.ps1
+++ b/env/bin/activate.ps1
@@ -0,0 +1,67 @@
+# This file must be dot sourced from PoSh; you cannot run it directly. Do this: . ./activate.ps1
+
+if (@($null,"Internal") -notcontains $myinvocation.commandorigin) {
+    Write-Host -Foreground red "You must 'source' this script: PS> . $($myinvocation.invocationname)"
+    exit 33
+}
+
+$script:THIS_PATH = $myinvocation.mycommand.path
+$script:BASE_DIR = Split-Path (Resolve-Path "$THIS_PATH/..") -Parent
+
+function global:deactivate([switch] $NonDestructive) {
+    if (Test-Path variable:_OLD_VIRTUAL_PATH) {
+        $env:PATH = $variable:_OLD_VIRTUAL_PATH
+        Remove-Variable "_OLD_VIRTUAL_PATH" -Scope global
+    }
+
+    if (Test-Path function:_old_virtual_prompt) {
+        $function:prompt = $function:_old_virtual_prompt
+        Remove-Item function:\_old_virtual_prompt
+    }
+
+    if ($env:VIRTUAL_ENV) {
+        Remove-Item env:VIRTUAL_ENV -ErrorAction SilentlyContinue
+    }
+
+    if (!$NonDestructive) {
+        # Self destruct!
+        Remove-Item function:deactivate
+        Remove-Item function:pydoc
+    }
+}
+
+function global:pydoc {
+    python -m pydoc $args
+}
+
+# unset irrelevant variables
+deactivate -nondestructive
+
+$VIRTUAL_ENV = $BASE_DIR
+$env:VIRTUAL_ENV = $VIRTUAL_ENV
+
+New-Variable -Scope global -Name _OLD_VIRTUAL_PATH -Value $env:PATH
+
+$env:PATH = "$env:VIRTUAL_ENV/bin:" + $env:PATH
+if (!$env:VIRTUAL_ENV_DISABLE_PROMPT) {
+    function global:_old_virtual_prompt {
+        ""
+    }
+    $function:_old_virtual_prompt = $function:prompt
+
+    if ("" -ne "") {
+        function global:prompt {
+            # Add the custom prefix to the existing prompt
+            $previous_prompt_value = & $function:_old_virtual_prompt
+            ("" + $previous_prompt_value)
+        }
+    }
+    else {
+        function global:prompt {
+            # Add a prefix to the current prompt, but don't discard it.
+            $previous_prompt_value = & $function:_old_virtual_prompt
+            $new_prompt_value = "($( Split-Path $env:VIRTUAL_ENV -Leaf )) "
+            ($new_prompt_value + $previous_prompt_value)
+        }
+    }
+}
--- a/env/bin/activate.xsh
+++ b/env/bin/activate.xsh
@@ -0,0 +1,46 @@
+"""Xonsh activate script for virtualenv"""
+from xonsh.tools import get_sep as _get_sep
+
+def _deactivate(args):
+    if "pydoc" in aliases:
+        del aliases["pydoc"]
+
+    if ${...}.get("_OLD_VIRTUAL_PATH", ""):
+        $PATH = $_OLD_VIRTUAL_PATH
+        del $_OLD_VIRTUAL_PATH
+
+    if ${...}.get("_OLD_VIRTUAL_PYTHONHOME", ""):
+        $PYTHONHOME = $_OLD_VIRTUAL_PYTHONHOME
+        del $_OLD_VIRTUAL_PYTHONHOME
+
+    if "VIRTUAL_ENV" in ${...}:
+        del $VIRTUAL_ENV
+
+    if "VIRTUAL_ENV_PROMPT" in ${...}:
+        del $VIRTUAL_ENV_PROMPT
+
+    if "nondestructive" not in args:
+        # Self destruct!
+        del aliases["deactivate"]
+
+
+# unset irrelevant variables
+_deactivate(["nondestructive"])
+aliases["deactivate"] = _deactivate
+
+$VIRTUAL_ENV = r"/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env"
+
+$_OLD_VIRTUAL_PATH = $PATH
+$PATH = $PATH[:]
+$PATH.add($VIRTUAL_ENV + _get_sep() + "bin", front=True, replace=True)
+
+if ${...}.get("PYTHONHOME", ""):
+    # unset PYTHONHOME if set
+    $_OLD_VIRTUAL_PYTHONHOME = $PYTHONHOME
+    del $PYTHONHOME
+
+$VIRTUAL_ENV_PROMPT = ""
+if not $VIRTUAL_ENV_PROMPT:
+    del $VIRTUAL_ENV_PROMPT
+
+aliases["pydoc"] = ["python", "-m", "pydoc"]
--- a/env/bin/activate_this.py
+++ b/env/bin/activate_this.py
@@ -0,0 +1,46 @@
+"""Activate virtualenv for current interpreter:
+
+Use exec(open(this_file).read(), {'__file__': this_file}).
+
+This can be used when you must use an existing Python interpreter, not the virtualenv bin/python.
+"""
+import os
+import site
+import sys
+
+try:
+    __file__
+except NameError:
+    raise AssertionError("You must use exec(open(this_file).read(), {'__file__': this_file}))")
+
+# prepend bin to PATH (this file is inside the bin directory)
+bin_dir = os.path.dirname(os.path.abspath(__file__))
+os.environ["PATH"] = os.pathsep.join([bin_dir] + os.environ.get("PATH", "").split(os.pathsep))
+
+base = os.path.dirname(bin_dir)
+
+# virtual env is right above bin directory
+os.environ["VIRTUAL_ENV"] = base
+
+# add the virtual environments site-package to the host python import mechanism
+IS_PYPY = hasattr(sys, "pypy_version_info")
+IS_JYTHON = sys.platform.startswith("java")
+if IS_JYTHON:
+    site_packages = os.path.join(base, "Lib", "site-packages")
+elif IS_PYPY:
+    site_packages = os.path.join(base, "site-packages")
+else:
+    IS_WIN = sys.platform == "win32"
+    if IS_WIN:
+        site_packages = os.path.join(base, "Lib", "site-packages")
+    else:
+        site_packages = os.path.join(base, "lib", "python{}.{}".format(*sys.version_info), "site-packages")
+
+prev = set(sys.path)
+site.addsitedir(site_packages)
+sys.real_prefix = sys.prefix
+sys.prefix = base
+
+# Move the added items to the front of the path, in place
+new = list(sys.path)
+sys.path[:] = [i for i in new if i not in prev] + [i for i in new if i in prev]
--- a/env/bin/black
+++ b/env/bin/black
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from black import patched_main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(patched_main())
--- a/env/bin/blackd
+++ b/env/bin/blackd
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from blackd import patched_main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(patched_main())
--- a/env/bin/easy_install
+++ b/env/bin/easy_install
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from setuptools.command.easy_install import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/bin/easy_install-3.7
+++ b/env/bin/easy_install-3.7
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from setuptools.command.easy_install import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/bin/pip
+++ b/env/bin/pip
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/bin/pip3
+++ b/env/bin/pip3
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/bin/pip3.7
+++ b/env/bin/pip3.7
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from pip._internal import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/bin/python
+++ b/env/bin/python
@@ -0,0 +1 @@
+python3.7
--- a/env/bin/python-config
+++ b/env/bin/python-config
@@ -0,0 +1,78 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python
+
+import sys
+import getopt
+import sysconfig
+
+valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags',
+              'ldflags', 'help']
+
+if sys.version_info >= (3, 2):
+    valid_opts.insert(-1, 'extension-suffix')
+    valid_opts.append('abiflags')
+if sys.version_info >= (3, 3):
+    valid_opts.append('configdir')
+
+
+def exit_with_usage(code=1):
+    sys.stderr.write("Usage: {0} [{1}]\n".format(
+        sys.argv[0], '|'.join('--'+opt for opt in valid_opts)))
+    sys.exit(code)
+
+try:
+    opts, args = getopt.getopt(sys.argv[1:], '', valid_opts)
+except getopt.error:
+    exit_with_usage()
+
+if not opts:
+    exit_with_usage()
+
+pyver = sysconfig.get_config_var('VERSION')
+getvar = sysconfig.get_config_var
+
+opt_flags = [flag for (flag, val) in opts]
+
+if '--help' in opt_flags:
+    exit_with_usage(code=0)
+
+for opt in opt_flags:
+    if opt == '--prefix':
+        print(sysconfig.get_config_var('prefix'))
+
+    elif opt == '--exec-prefix':
+        print(sysconfig.get_config_var('exec_prefix'))
+
+    elif opt in ('--includes', '--cflags'):
+        flags = ['-I' + sysconfig.get_path('include'),
+                 '-I' + sysconfig.get_path('platinclude')]
+        if opt == '--cflags':
+            flags.extend(getvar('CFLAGS').split())
+        print(' '.join(flags))
+
+    elif opt in ('--libs', '--ldflags'):
+        abiflags = getattr(sys, 'abiflags', '')
+        libs = ['-lpython' + pyver + abiflags]
+        libs += getvar('LIBS').split()
+        libs += getvar('SYSLIBS').split()
+        # add the prefix/lib/pythonX.Y/config dir, but only if there is no
+        # shared library in prefix/lib/.
+        if opt == '--ldflags':
+            if not getvar('Py_ENABLE_SHARED'):
+                libs.insert(0, '-L' + getvar('LIBPL'))
+            if not getvar('PYTHONFRAMEWORK'):
+                libs.extend(getvar('LINKFORSHARED').split())
+        print(' '.join(libs))
+
+    elif opt == '--extension-suffix':
+        ext_suffix = sysconfig.get_config_var('EXT_SUFFIX')
+        if ext_suffix is None:
+            ext_suffix = sysconfig.get_config_var('SO')
+        print(ext_suffix)
+
+    elif opt == '--abiflags':
+        if not getattr(sys, 'abiflags', None):
+            exit_with_usage()
+        print(sys.abiflags)
+
+    elif opt == '--configdir':
+        print(sysconfig.get_config_var('LIBPL'))
--- a/env/bin/python3
+++ b/env/bin/python3
@@ -0,0 +1 @@
+python3.7
--- a/env/bin/python3.7
+++ b/env/bin/python3.7
--- a/env/bin/wheel
+++ b/env/bin/wheel
@@ -0,0 +1,10 @@
+#!/Users/jacob/projects/ethdev/0x/workspace-remote/workspace/0x-monorepo/env/bin/python3.7
+# -*- coding: utf-8 -*-
+import re
+import sys
+
+from wheel.cli import main
+
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
--- a/env/include/python3.7m
+++ b/env/include/python3.7m
@@ -0,0 +1 @@
+/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/include/python3.7m
--- a/package.json
+++ b/package.json
@@ -50,9 +50,9 @@
    "config": {
        "contractsPackages": "@0x/contracts-asset-proxy @0x/contracts-erc20 @0x/contracts-erc721 @0x/contracts-erc1155 @0x/contracts-exchange @0x/contracts-exchange-forwarder @0x/contracts-exchange-libs @0x/contracts-extensions @0x/contracts-multisig @0x/contracts-test-utils @0x/contracts-utils @0x/contracts-coordinator @0x/contracts-dev-utils",
        "mnemonic": "concert load couple harbor equip island argue ramp clarify fence smart topic",
-        "packagesWithDocPages": "0x.js connect json-schemas subproviders web3-wrapper order-utils order-watcher sol-compiler sol-coverage sol-profiler sol-trace ethereum-types asset-buyer migrations",
+        "packagesWithDocPages": "0x.js connect json-schemas subproviders web3-wrapper order-utils sol-compiler sol-coverage sol-profiler sol-trace ethereum-types asset-buyer migrations",
        "ignoreDependencyVersions": "@types/styled-components @types/node",
-        "ignoreDependencyVersionsForPackage": "website instant dev-tools-pages"
+        "ignoreDependencyVersionsForPackage": "website instant dev-tools-pages contract-wrappers"
    },
    "bundlewatch": {
        "files": [
--- a/packages/0x.js/CHANGELOG.json
+++ b/packages/0x.js/CHANGELOG.json
@@ -1,4 +1,21 @@
 [
+    {
+        "version": "7.0.0",
+        "changes": [
+            {
+                "note": "Add optional `exchangeAddress` parameter to `signatureUtils.isValidSignatureAsync` to fix `Validator` type signatures.",
+                "pr": 2017
+            },
+            {
+                "note": "Removed @0x/order-watcher"
+            },
+            {
+                "note": "Update to latest @0x/contract-wrappers v11",
+                "pr": 2068
+            }
+        ],
+        "timestamp": 1566446343
+    },
    {
        "timestamp": 1565296576,
        "version": "6.0.15",
--- a/packages/0x.js/CHANGELOG.md
+++ b/packages/0x.js/CHANGELOG.md
@@ -5,6 +5,12 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v7.0.0 - _August 22, 2019_
+
+    * Add optional `exchangeAddress` parameter to `signatureUtils.isValidSignatureAsync` to fix `Validator` type signatures. (#2017)
+    * Removed @0x/order-watcher
+    * Update to latest @0x/contract-wrappers v11 (#2068)
+
 ## v6.0.15 - _August 8, 2019_

    * Dependencies updated
--- a/packages/0x.js/README.md
+++ b/packages/0x.js/README.md
@@ -1,6 +1,6 @@
 ## 0x.js

-A TypeScript/Javascript library for interacting with the 0x protocol. It is a high level package which combines a number of underlying packages such as order-utils and order-watcher.
+A TypeScript/Javascript library for interacting with the 0x protocol. It is a high level package which combines a number of underlying packages such as order-utils and asset-data-utils.

 ### Read the [Documentation](https://0xproject.com/docs/0x.js).

--- a/packages/0x.js/package.json
+++ b/packages/0x.js/package.json
@@ -1,6 +1,6 @@
 {
    "name": "0x.js",
-    "version": "6.0.15",
+    "version": "7.0.0",
    "engines": {
        "node": ">=6.12"
    },
@@ -43,10 +43,9 @@
    },
    "license": "Apache-2.0",
    "devDependencies": {
-        "@0x/abi-gen-wrappers": "^5.2.0",
-        "@0x/contract-addresses": "^3.0.3",
-        "@0x/dev-utils": "^2.3.0",
-        "@0x/migrations": "^4.2.0",
+        "@0x/contract-addresses": "^3.1.0",
+        "@0x/dev-utils": "^2.3.1",
+        "@0x/migrations": "^4.3.0",
        "@0x/tslint-config": "^3.0.1",
        "@types/lodash": "4.14.104",
        "@types/mocha": "^5.2.7",
@@ -73,17 +72,16 @@
        "webpack": "^4.20.2"
    },
    "dependencies": {
-        "@0x/assert": "^2.1.3",
-        "@0x/asset-swapper": "^1.0.1",
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contract-wrappers": "9.1.7",
-        "@0x/order-utils": "^8.2.5",
-        "@0x/order-watcher": "^4.0.17",
-        "@0x/subproviders": "^5.0.1",
+        "@0x/assert": "^2.1.4",
+        "@0x/asset-swapper": "^1.0.2",
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contract-wrappers": "^11.1.0",
+        "@0x/order-utils": "^8.3.0",
+        "@0x/subproviders": "^5.0.2",
        "@0x/types": "^2.4.1",
        "@0x/typescript-typings": "^4.2.4",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "@types/web3-provider-engine": "^14.0.0",
        "ethereum-types": "^2.1.4",
        "ethers": "~4.0.4",
--- a/packages/0x.js/src/index.ts
+++ b/packages/0x.js/src/index.ts
@@ -13,36 +13,19 @@ export {
    CoordinatorWrapper,
    CoordinatorServerCancellationResponse,
    CoordinatorServerError,
-    DutchAuctionWrapper,
-    ERC20TokenWrapper,
-    ERC721TokenWrapper,
-    EtherTokenWrapper,
-    ExchangeWrapper,
-    ERC20ProxyWrapper,
-    ERC721ProxyWrapper,
-    ForwarderWrapper,
-    OrderValidatorWrapper,
    IndexedFilterValues,
-    BlockRange,
    ContractWrappersConfig,
-    MethodOpts,
    OrderTransactionOpts,
    TransactionOpts,
-    OrderStatus,
    OrderInfo,
    EventCallback,
    DecodedLogEvent,
-    TransactionEncoder,
-    BalanceAndAllowance,
-    OrderAndTraderInfo,
-    TraderInfo,
-    ValidateOrderFillableOpts,
-} from '@0x/contract-wrappers';
-
-export {
+    OrderStatus,
    DutchAuctionContract,
    ERC20ProxyContract,
+    ERC20TokenContract,
    ERC721ProxyContract,
+    ERC721TokenContract,
    ExchangeContract,
    ForwarderContract,
    OrderValidatorContract,
@@ -69,9 +52,7 @@ export {
    ExchangeCancelEventArgs,
    ExchangeEventArgs,
    ExchangeEvents,
-} from '@0x/abi-gen-wrappers';
-
-export { OrderWatcher, OnOrderStateChangeCallback, OrderWatcherConfig } from '@0x/order-watcher';
+} from '@0x/contract-wrappers';

 export import Web3ProviderEngine = require('web3-provider-engine');

@@ -88,14 +69,10 @@ export { AbiDecoder, DecodedCalldata } from '@0x/utils';
 export { BigNumber } from '@0x/utils';

 export {
-    ExchangeContractErrs,
    Order,
    SignedOrder,
    DutchAuctionData,
    ECSignature,
-    OrderStateValid,
-    OrderStateInvalid,
-    OrderState,
    AssetProxyId,
    AssetData,
    SingleAssetData,
@@ -106,11 +83,9 @@ export {
    MultiAssetDataWithRecursiveDecoding,
    StaticCallAssetData,
    SignatureType,
-    ObjectMap,
-    OrderRelevantState,
-    Stats,
    ZeroExTransaction,
    SignedZeroExTransaction,
+    ValidatorSignature,
 } from '@0x/types';

 export {
--- a/packages/abi-gen-templates/CHANGELOG.json
+++ b/packages/abi-gen-templates/CHANGELOG.json
@@ -1,4 +1,13 @@
 [
+    {
+        "timestamp": 1566446343,
+        "version": "2.4.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
    {
        "timestamp": 1565296576,
        "version": "2.4.1",
--- a/packages/abi-gen-templates/CHANGELOG.md
+++ b/packages/abi-gen-templates/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v2.4.2 - _August 22, 2019_
+
+    * Dependencies updated
+
 ## v2.4.1 - _August 8, 2019_

    * Dependencies updated
--- a/packages/abi-gen-templates/Python/contract.handlebars
+++ b/packages/abi-gen-templates/Python/contract.handlebars
@@ -78,12 +78,14 @@ class {{contractName}}:
            provider
        ).eth

+        {{#if methods}}
        functions = self._web3_eth.contract(address=to_checksum_address(contract_address), abi={{contractName}}.abi()).functions

        {{#each methods}}
        self.{{toPythonIdentifier this.languageSpecificName}} = {{toPythonClassname this.languageSpecificName}}Method(provider, contract_address, functions.{{this.name}}, validator)

        {{/each}}
+        {{/if}}
 {{#each events}}
 {{> event contractName=../contractName}}
 {{/each}}
--- a/packages/abi-gen-templates/package.json
+++ b/packages/abi-gen-templates/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/abi-gen-templates",
-    "version": "2.4.1",
+    "version": "2.4.2",
    "engines": {
        "node": ">=6.12"
    },
--- a/packages/abi-gen-templates/partials/tx.handlebars
+++ b/packages/abi-gen-templates/partials/tx.handlebars
@@ -100,4 +100,22 @@ public {{languageSpecificName}} = {
    return gas;
    },
    {{> callAsync}}
+    async validateAndSendTransactionAsync(
+        {{> typed_params inputs=inputs}}
+        txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+        await (this as any).{{languageSpecificName}}.callAsync(
+        {{#each inputs~}}
+            {{name}},
+        {{/each~}}
+            txData,
+        );
+        const txHash =  await (this as any).{{languageSpecificName}}.sendTransactionAsync(
+        {{#each inputs~}}
+            {{name}},
+        {{/each~}}
+            txData,
+        ); 
+        return txHash;
+    }
 };
--- a/packages/abi-gen-wrappers/CHANGELOG.json
+++ b/packages/abi-gen-wrappers/CHANGELOG.json
@@ -1,4 +1,14 @@
 [
+    {
+        "version": "5.3.0",
+        "changes": [
+            {
+                "note": "Added DevUtils",
+                "pr": 2060
+            }
+        ],
+        "timestamp": 1566446343
+    },
    {
        "version": "5.2.0",
        "changes": [
--- a/packages/abi-gen-wrappers/CHANGELOG.md
+++ b/packages/abi-gen-wrappers/CHANGELOG.md
@@ -5,6 +5,10 @@ Edit the package's CHANGELOG.json file only.

 CHANGELOG

+## v5.3.0 - _August 22, 2019_
+
+    * Added DevUtils (#2060)
+
 ## v5.2.0 - _August 8, 2019_

    * Updated to include `getABIDecodedTransactionData` and `getABIDecodedReturnData` (#2018)
--- a/packages/abi-gen-wrappers/package.json
+++ b/packages/abi-gen-wrappers/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@0x/abi-gen-wrappers",
-    "version": "5.2.0",
+    "version": "5.3.0",
    "engines": {
        "node": ">=6.12"
    },
@@ -22,7 +22,7 @@
        "docs": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --out generated_docs ./src/generated-wrappers/*"
    },
    "config": {
-        "abis": "../contract-artifacts/artifacts/@(AssetProxyOwner|DutchAuction|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC20Token|ERC721Proxy|ERC721Token|Exchange|Forwarder|IAssetProxy|IValidator|IWallet|MultiAssetProxy|OrderValidator|WETH9|ZRXToken|Coordinator|CoordinatorRegistry|EthBalanceChecker|ERC1155Proxy|StaticCallProxy).json"
+        "abis": "../contract-artifacts/artifacts/@(AssetProxyOwner|DevUtils|DutchAuction|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC20Token|ERC721Proxy|ERC721Token|Exchange|Forwarder|IAssetProxy|IValidator|IWallet|MultiAssetProxy|OrderValidator|WETH9|ZRXToken|Coordinator|CoordinatorRegistry|EthBalanceChecker|ERC1155Proxy|StaticCallProxy).json"
    },
    "repository": {
        "type": "git",
@@ -34,23 +34,23 @@
    },
    "homepage": "https://github.com/0xProject/0x-monorepo/packages/abi-gen-wrappers/README.md",
    "devDependencies": {
-        "@0x/abi-gen": "^4.1.0",
-        "@0x/abi-gen-templates": "^2.4.1",
-        "@0x/assert": "^2.1.3",
-        "@0x/json-schemas": "^3.1.13",
+        "@0x/abi-gen": "^4.1.1",
+        "@0x/abi-gen-templates": "^2.4.2",
+        "@0x/assert": "^2.1.4",
+        "@0x/json-schemas": "^4.0.0",
        "@0x/tslint-config": "^3.0.1",
        "@0x/types": "^2.4.1",
        "@0x/utils": "^4.5.0",
-        "@0x/web3-wrapper": "^6.0.10",
+        "@0x/web3-wrapper": "^6.0.11",
        "ethereum-types": "^2.1.4",
        "ethers": "~4.0.4",
        "lodash": "^4.17.11",
        "shx": "^0.2.2"
    },
    "dependencies": {
-        "@0x/base-contract": "^5.3.1",
-        "@0x/contract-addresses": "^3.0.3",
-        "@0x/contract-artifacts": "^2.0.4"
+        "@0x/base-contract": "^5.3.2",
+        "@0x/contract-addresses": "^3.1.0",
+        "@0x/contract-artifacts": "^2.2.0"
    },
    "publishConfig": {
        "access": "public"
--- a/packages/abi-gen-wrappers/src/generated-wrappers/asset_proxy_owner.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/asset_proxy_owner.ts
@@ -336,6 +336,11 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(owner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).removeOwner.callAsync(owner, txData);
+            const txHash = await (this as any).removeOwner.sendTransactionAsync(owner, txData);
+            return txHash;
+        },
    };
    /**
     * Allows an owner to revoke a confirmation for a transaction.
@@ -492,6 +497,14 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            transactionId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).revokeConfirmation.callAsync(transactionId, txData);
+            const txHash = await (this as any).revokeConfirmation.sendTransactionAsync(transactionId, txData);
+            return txHash;
+        },
    };
    public isOwner = {
        /**
@@ -803,6 +816,17 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            transactionId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).executeRemoveAuthorizedAddressAtIndex.callAsync(transactionId, txData);
+            const txHash = await (this as any).executeRemoveAuthorizedAddressAtIndex.sendTransactionAsync(
+                transactionId,
+                txData,
+            );
+            return txHash;
+        },
    };
    public secondsTimeLocked = {
        /**
@@ -1138,6 +1162,19 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            assetProxyContract: string,
+            isRegistered: boolean,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).registerAssetProxy.callAsync(assetProxyContract, isRegistered, txData);
+            const txHash = await (this as any).registerAssetProxy.sendTransactionAsync(
+                assetProxyContract,
+                isRegistered,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Allows to add a new owner. Transaction has to be sent by wallet.
@@ -1288,6 +1325,11 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(owner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).addOwner.callAsync(owner, txData);
+            const txHash = await (this as any).addOwner.sendTransactionAsync(owner, txData);
+            return txHash;
+        },
    };
    /**
     * Returns the confirmation status of a transaction.
@@ -1526,6 +1568,14 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _secondsTimeLocked: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).changeTimeLock.callAsync(_secondsTimeLocked, txData);
+            const txHash = await (this as any).changeTimeLock.sendTransactionAsync(_secondsTimeLocked, txData);
+            return txHash;
+        },
    };
    public isAssetProxyRegistered = {
        /**
@@ -2195,6 +2245,14 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _required: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).changeRequirement.callAsync(_required, txData);
+            const txHash = await (this as any).changeRequirement.sendTransactionAsync(_required, txData);
+            return txHash;
+        },
    };
    /**
     * Allows an owner to confirm a transaction.
@@ -2351,6 +2409,14 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            transactionId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).confirmTransaction.callAsync(transactionId, txData);
+            const txHash = await (this as any).confirmTransaction.sendTransactionAsync(transactionId, txData);
+            return txHash;
+        },
    };
    /**
     * Allows an owner to submit and confirm a transaction.
@@ -2561,6 +2627,16 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<BigNumber>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            destination: string,
+            value: BigNumber,
+            data: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).submitTransaction.callAsync(destination, value, data, txData);
+            const txHash = await (this as any).submitTransaction.sendTransactionAsync(destination, value, data, txData);
+            return txHash;
+        },
    };
    public confirmationTimes = {
        /**
@@ -2939,6 +3015,15 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            owner: string,
+            newOwner: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).replaceOwner.callAsync(owner, newOwner, txData);
+            const txHash = await (this as any).replaceOwner.sendTransactionAsync(owner, newOwner, txData);
+            return txHash;
+        },
    };
    /**
     * Allows anyone to execute a confirmed transaction.
@@ -3095,6 +3180,14 @@ export class AssetProxyOwnerContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            transactionId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).executeTransaction.callAsync(transactionId, txData);
+            const txHash = await (this as any).executeTransaction.sendTransactionAsync(transactionId, txData);
+            return txHash;
+        },
    };
    private readonly _subscriptionManager: SubscriptionManager<AssetProxyOwnerEventArgs, AssetProxyOwnerEvents>;
    public static async deployFrom0xArtifactAsync(
--- a/packages/abi-gen-wrappers/src/generated-wrappers/coordinator.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/coordinator.ts
@@ -567,6 +567,32 @@ export class CoordinatorContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            transaction: { salt: BigNumber; signerAddress: string; data: string },
+            txOrigin: string,
+            transactionSignature: string,
+            approvalExpirationTimeSeconds: BigNumber[],
+            approvalSignatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).executeTransaction.callAsync(
+                transaction,
+                txOrigin,
+                transactionSignature,
+                approvalExpirationTimeSeconds,
+                approvalSignatures,
+                txData,
+            );
+            const txHash = await (this as any).executeTransaction.sendTransactionAsync(
+                transaction,
+                txOrigin,
+                transactionSignature,
+                approvalExpirationTimeSeconds,
+                approvalSignatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    public EIP712_EXCHANGE_DOMAIN_HASH = {
        /**
--- a/packages/abi-gen-wrappers/src/generated-wrappers/coordinator_registry.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/coordinator_registry.ts
@@ -201,6 +201,14 @@ export class CoordinatorRegistryContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            coordinatorEndpoint: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).setCoordinatorEndpoint.callAsync(coordinatorEndpoint, txData);
+            const txHash = await (this as any).setCoordinatorEndpoint.sendTransactionAsync(coordinatorEndpoint, txData);
+            return txHash;
+        },
    };
    /**
     * Gets the endpoint for a Coordinator.
--- a/packages/abi-gen-wrappers/src/generated-wrappers/dummy_erc20_token.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/dummy_erc20_token.ts
@@ -302,6 +302,15 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _spender: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).approve.callAsync(_spender, _value, txData);
+            const txHash = await (this as any).approve.sendTransactionAsync(_spender, _value, txData);
+            return txHash;
+        },
    };
    /**
     * Query total supply of token
@@ -578,6 +587,16 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transferFrom.callAsync(_from, _to, _value, txData);
+            const txHash = await (this as any).transferFrom.sendTransactionAsync(_from, _to, _value, txData);
+            return txHash;
+        },
    };
    public decimals = {
        /**
@@ -988,6 +1007,14 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).mint.callAsync(_value, txData);
+            const txHash = await (this as any).mint.sendTransactionAsync(_value, txData);
+            return txHash;
+        },
    };
    /**
     * send `value` token to `to` from `msg.sender`
@@ -1162,6 +1189,15 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _to: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transfer.callAsync(_to, _value, txData);
+            const txHash = await (this as any).transfer.sendTransactionAsync(_to, _value, txData);
+            return txHash;
+        },
    };
    public allowance = {
        /**
@@ -1430,6 +1466,15 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _target: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).setBalance.callAsync(_target, _value, txData);
+            const txHash = await (this as any).setBalance.sendTransactionAsync(_target, _value, txData);
+            return txHash;
+        },
    };
    public transferOwnership = {
        /**
@@ -1574,6 +1619,11 @@ export class DummyERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    public MAX_MINT_AMOUNT = {
        /**
--- a/packages/abi-gen-wrappers/src/generated-wrappers/dummy_erc721_token.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/dummy_erc721_token.ts
@@ -387,6 +387,15 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _approved: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).approve.callAsync(_approved, _tokenId, txData);
+            const txHash = await (this as any).approve.sendTransactionAsync(_approved, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * Throws unless `msg.sender` is the current owner, an authorized
@@ -599,6 +608,16 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transferFrom.callAsync(_from, _to, _tokenId, txData);
+            const txHash = await (this as any).transferFrom.sendTransactionAsync(_from, _to, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * Function to mint a new token
@@ -777,6 +796,15 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _to: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).mint.callAsync(_to, _tokenId, txData);
+            const txHash = await (this as any).mint.sendTransactionAsync(_to, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * This works identically to the other function with an extra data parameter,
@@ -987,6 +1015,16 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).safeTransferFrom1.callAsync(_from, _to, _tokenId, txData);
+            const txHash = await (this as any).safeTransferFrom1.sendTransactionAsync(_from, _to, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * NFTs assigned to zero address are considered invalid, and queries
@@ -1439,6 +1477,15 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _owner: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).burn.callAsync(_owner, _tokenId, txData);
+            const txHash = await (this as any).burn.sendTransactionAsync(_owner, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * Emits the ApprovalForAll event. The contract MUST allow
@@ -1630,6 +1677,15 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _operator: string,
+            _approved: boolean,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).setApprovalForAll.callAsync(_operator, _approved, txData);
+            const txHash = await (this as any).setApprovalForAll.sendTransactionAsync(_operator, _approved, txData);
+            return txHash;
+        },
    };
    /**
     * Throws unless `msg.sender` is the current owner, an authorized
@@ -1868,6 +1924,23 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            _data: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).safeTransferFrom2.callAsync(_from, _to, _tokenId, _data, txData);
+            const txHash = await (this as any).safeTransferFrom2.sendTransactionAsync(
+                _from,
+                _to,
+                _tokenId,
+                _data,
+                txData,
+            );
+            return txHash;
+        },
    };
    public isApprovedForAll = {
        /**
@@ -2094,6 +2167,11 @@ export class DummyERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    private readonly _subscriptionManager: SubscriptionManager<DummyERC721TokenEventArgs, DummyERC721TokenEvents>;
    public static async deployFrom0xArtifactAsync(
--- a/packages/abi-gen-wrappers/src/generated-wrappers/dutch_auction.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/dutch_auction.ts
@@ -311,6 +311,27 @@ export class DutchAuctionContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            order: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).getAuctionDetails.callAsync(order, txData);
+            const txHash = await (this as any).getAuctionDetails.sendTransactionAsync(order, txData);
+            return txHash;
+        },
    };
    /**
     * Matches the buy and sell orders at an amount given the following: the current block time, the auction
@@ -775,6 +796,49 @@ export class DutchAuctionContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            buyOrder: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            sellOrder: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            buySignature: string,
+            sellSignature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).matchOrders.callAsync(buyOrder, sellOrder, buySignature, sellSignature, txData);
+            const txHash = await (this as any).matchOrders.sendTransactionAsync(
+                buyOrder,
+                sellOrder,
+                buySignature,
+                sellSignature,
+                txData,
+            );
+            return txHash;
+        },
    };
    public static async deployFrom0xArtifactAsync(
        artifact: ContractArtifact | SimpleContractArtifact,
--- a/packages/abi-gen-wrappers/src/generated-wrappers/erc20_proxy.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/erc20_proxy.ts
@@ -205,6 +205,11 @@ export class ERC20ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).addAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).addAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    public authorities = {
        /**
@@ -425,6 +430,11 @@ export class ERC20ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).removeAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).removeAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    public owner = {
        /**
@@ -677,6 +687,19 @@ export class ERC20ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            target: string,
+            index: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).removeAuthorizedAddressAtIndex.callAsync(target, index, txData);
+            const txHash = await (this as any).removeAuthorizedAddressAtIndex.sendTransactionAsync(
+                target,
+                index,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Gets the proxy id associated with the proxy address.
@@ -1023,6 +1046,11 @@ export class ERC20ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    private readonly _subscriptionManager: SubscriptionManager<ERC20ProxyEventArgs, ERC20ProxyEvents>;
    public static async deployFrom0xArtifactAsync(
--- a/packages/abi-gen-wrappers/src/generated-wrappers/erc20_token.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/erc20_token.ts
@@ -240,6 +240,15 @@ export class ERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _spender: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).approve.callAsync(_spender, _value, txData);
+            const txHash = await (this as any).approve.sendTransactionAsync(_spender, _value, txData);
+            return txHash;
+        },
    };
    /**
     * Query total supply of token
@@ -516,6 +525,16 @@ export class ERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transferFrom.callAsync(_from, _to, _value, txData);
+            const txHash = await (this as any).transferFrom.sendTransactionAsync(_from, _to, _value, txData);
+            return txHash;
+        },
    };
    /**
     * Query the balance of owner
@@ -764,6 +783,15 @@ export class ERC20TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _to: string,
+            _value: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transfer.callAsync(_to, _value, txData);
+            const txHash = await (this as any).transfer.sendTransactionAsync(_to, _value, txData);
+            return txHash;
+        },
    };
    public allowance = {
        /**
--- a/packages/abi-gen-wrappers/src/generated-wrappers/erc721_proxy.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/erc721_proxy.ts
@@ -205,6 +205,11 @@ export class ERC721ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).addAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).addAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    public authorities = {
        /**
@@ -425,6 +430,11 @@ export class ERC721ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).removeAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).removeAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    public owner = {
        /**
@@ -677,6 +687,19 @@ export class ERC721ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            target: string,
+            index: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).removeAuthorizedAddressAtIndex.callAsync(target, index, txData);
+            const txHash = await (this as any).removeAuthorizedAddressAtIndex.sendTransactionAsync(
+                target,
+                index,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Gets the proxy id associated with the proxy address.
@@ -1023,6 +1046,11 @@ export class ERC721ProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    private readonly _subscriptionManager: SubscriptionManager<ERC721ProxyEventArgs, ERC721ProxyEvents>;
    public static async deployFrom0xArtifactAsync(
--- a/packages/abi-gen-wrappers/src/generated-wrappers/erc721_token.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/erc721_token.ts
@@ -325,6 +325,15 @@ export class ERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _approved: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).approve.callAsync(_approved, _tokenId, txData);
+            const txHash = await (this as any).approve.sendTransactionAsync(_approved, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * Throws unless `msg.sender` is the current owner, an authorized
@@ -537,6 +546,16 @@ export class ERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transferFrom.callAsync(_from, _to, _tokenId, txData);
+            const txHash = await (this as any).transferFrom.sendTransactionAsync(_from, _to, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * This works identically to the other function with an extra data parameter,
@@ -747,6 +766,16 @@ export class ERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).safeTransferFrom1.callAsync(_from, _to, _tokenId, txData);
+            const txHash = await (this as any).safeTransferFrom1.sendTransactionAsync(_from, _to, _tokenId, txData);
+            return txHash;
+        },
    };
    /**
     * NFTs assigned to zero address are considered invalid, and queries
@@ -1088,6 +1117,15 @@ export class ERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _operator: string,
+            _approved: boolean,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).setApprovalForAll.callAsync(_operator, _approved, txData);
+            const txHash = await (this as any).setApprovalForAll.sendTransactionAsync(_operator, _approved, txData);
+            return txHash;
+        },
    };
    /**
     * Throws unless `msg.sender` is the current owner, an authorized
@@ -1326,6 +1364,23 @@ export class ERC721TokenContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            _from: string,
+            _to: string,
+            _tokenId: BigNumber,
+            _data: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).safeTransferFrom2.callAsync(_from, _to, _tokenId, _data, txData);
+            const txHash = await (this as any).safeTransferFrom2.sendTransactionAsync(
+                _from,
+                _to,
+                _tokenId,
+                _data,
+                txData,
+            );
+            return txHash;
+        },
    };
    public isApprovedForAll = {
        /**
--- a/packages/abi-gen-wrappers/src/generated-wrappers/exchange.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/exchange.ts
@@ -477,6 +477,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            takerAssetFillAmounts: BigNumber[],
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).batchFillOrders.callAsync(orders, takerAssetFillAmounts, signatures, txData);
+            const txHash = await (this as any).batchFillOrders.sendTransactionAsync(
+                orders,
+                takerAssetFillAmounts,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    public cancelled = {
        /**
@@ -750,6 +778,16 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            hash: string,
+            signerAddress: string,
+            signature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).preSign.callAsync(hash, signerAddress, signature, txData);
+            const txHash = await (this as any).preSign.sendTransactionAsync(hash, signerAddress, signature, txData);
+            return txHash;
+        },
    };
    /**
     * Match two complementary orders that have a profitable spread.
@@ -1193,6 +1231,49 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            leftOrder: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            rightOrder: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            leftSignature: string,
+            rightSignature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).matchOrders.callAsync(leftOrder, rightOrder, leftSignature, rightSignature, txData);
+            const txHash = await (this as any).matchOrders.sendTransactionAsync(
+                leftOrder,
+                rightOrder,
+                leftSignature,
+                rightSignature,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Fills the input order.
@@ -1504,6 +1585,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            order: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            takerAssetFillAmount: BigNumber,
+            signature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).fillOrderNoThrow.callAsync(order, takerAssetFillAmount, signature, txData);
+            const txHash = await (this as any).fillOrderNoThrow.sendTransactionAsync(
+                order,
+                takerAssetFillAmount,
+                signature,
+                txData,
+            );
+            return txHash;
+        },
    };
    public assetProxies = {
        /**
@@ -1813,6 +1922,27 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).batchCancelOrders.callAsync(orders, txData);
+            const txHash = await (this as any).batchCancelOrders.sendTransactionAsync(orders, txData);
+            return txHash;
+        },
    };
    /**
     * Synchronously executes multiple calls of fillOrKill.
@@ -2133,6 +2263,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            takerAssetFillAmounts: BigNumber[],
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).batchFillOrKillOrders.callAsync(orders, takerAssetFillAmounts, signatures, txData);
+            const txHash = await (this as any).batchFillOrKillOrders.sendTransactionAsync(
+                orders,
+                takerAssetFillAmounts,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Cancels all orders created by makerAddress with a salt less than or equal to the targetOrderEpoch
@@ -2295,6 +2453,14 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            targetOrderEpoch: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).cancelOrdersUpTo.callAsync(targetOrderEpoch, txData);
+            const txHash = await (this as any).cancelOrdersUpTo.sendTransactionAsync(targetOrderEpoch, txData);
+            return txHash;
+        },
    };
    /**
     * Fills an order with specified parameters and ECDSA signature.
@@ -2616,6 +2782,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            takerAssetFillAmounts: BigNumber[],
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).batchFillOrdersNoThrow.callAsync(orders, takerAssetFillAmounts, signatures, txData);
+            const txHash = await (this as any).batchFillOrdersNoThrow.sendTransactionAsync(
+                orders,
+                takerAssetFillAmounts,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Gets an asset proxy.
@@ -3067,6 +3261,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            order: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            takerAssetFillAmount: BigNumber,
+            signature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).fillOrKillOrder.callAsync(order, takerAssetFillAmount, signature, txData);
+            const txHash = await (this as any).fillOrKillOrder.sendTransactionAsync(
+                order,
+                takerAssetFillAmount,
+                signature,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Approves/unnapproves a Validator contract to verify signatures on signer's behalf.
@@ -3261,6 +3483,19 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            validatorAddress: string,
+            approval: boolean,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).setSignatureValidatorApproval.callAsync(validatorAddress, approval, txData);
+            const txHash = await (this as any).setSignatureValidatorApproval.sendTransactionAsync(
+                validatorAddress,
+                approval,
+                txData,
+            );
+            return txHash;
+        },
    };
    public allowedValidators = {
        /**
@@ -3653,6 +3888,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            takerAssetFillAmount: BigNumber,
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketSellOrders.callAsync(orders, takerAssetFillAmount, signatures, txData);
+            const txHash = await (this as any).marketSellOrders.sendTransactionAsync(
+                orders,
+                takerAssetFillAmount,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Fetches information for all passed in orders.
@@ -4324,6 +4587,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            makerAssetFillAmount: BigNumber,
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketBuyOrdersNoThrow.callAsync(orders, makerAssetFillAmount, signatures, txData);
+            const txHash = await (this as any).marketBuyOrdersNoThrow.sendTransactionAsync(
+                orders,
+                makerAssetFillAmount,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Fills the input order.
@@ -4629,6 +4920,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            order: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            takerAssetFillAmount: BigNumber,
+            signature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).fillOrder.callAsync(order, takerAssetFillAmount, signature, txData);
+            const txHash = await (this as any).fillOrder.sendTransactionAsync(
+                order,
+                takerAssetFillAmount,
+                signature,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Executes an exchange method call in the context of signer.
@@ -4855,6 +5174,23 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            salt: BigNumber,
+            signerAddress: string,
+            data: string,
+            signature: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).executeTransaction.callAsync(salt, signerAddress, data, signature, txData);
+            const txHash = await (this as any).executeTransaction.sendTransactionAsync(
+                salt,
+                signerAddress,
+                data,
+                signature,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Registers an asset proxy to its asset proxy id.
@@ -5012,6 +5348,14 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            assetProxy: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).registerAssetProxy.callAsync(assetProxy, txData);
+            const txHash = await (this as any).registerAssetProxy.sendTransactionAsync(assetProxy, txData);
+            return txHash;
+        },
    };
    /**
     * Gets information about an order: status, hash, and amount filled.
@@ -5377,6 +5721,27 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            order: {
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            },
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).cancelOrder.callAsync(order, txData);
+            const txHash = await (this as any).cancelOrder.sendTransactionAsync(order, txData);
+            return txHash;
+        },
    };
    public orderEpoch = {
        /**
@@ -5832,6 +6197,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            takerAssetFillAmount: BigNumber,
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketSellOrdersNoThrow.callAsync(orders, takerAssetFillAmount, signatures, txData);
+            const txHash = await (this as any).marketSellOrdersNoThrow.sendTransactionAsync(
+                orders,
+                takerAssetFillAmount,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    public EIP712_DOMAIN_HASH = {
        /**
@@ -6209,6 +6602,34 @@ export class ExchangeContract extends BaseContract {
            }>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            makerAssetFillAmount: BigNumber,
+            signatures: string[],
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketBuyOrders.callAsync(orders, makerAssetFillAmount, signatures, txData);
+            const txHash = await (this as any).marketBuyOrders.sendTransactionAsync(
+                orders,
+                makerAssetFillAmount,
+                signatures,
+                txData,
+            );
+            return txHash;
+        },
    };
    public currentContextAddress = {
        /**
@@ -6415,6 +6836,11 @@ export class ExchangeContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    public VERSION = {
        /**
--- a/packages/abi-gen-wrappers/src/generated-wrappers/forwarder.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/forwarder.ts
@@ -584,6 +584,64 @@ export class ForwarderContract extends BaseContract {
            >(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            makerAssetFillAmount: BigNumber,
+            signatures: string[],
+            feeOrders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            feeSignatures: string[],
+            feePercentage: BigNumber,
+            feeRecipient: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketBuyOrdersWithEth.callAsync(
+                orders,
+                makerAssetFillAmount,
+                signatures,
+                feeOrders,
+                feeSignatures,
+                feePercentage,
+                feeRecipient,
+                txData,
+            );
+            const txHash = await (this as any).marketBuyOrdersWithEth.sendTransactionAsync(
+                orders,
+                makerAssetFillAmount,
+                signatures,
+                feeOrders,
+                feeSignatures,
+                feePercentage,
+                feeRecipient,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Withdraws assets from this contract. The contract requires a ZRX balance in order to
@@ -763,6 +821,15 @@ export class ForwarderContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            assetData: string,
+            amount: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).withdrawAsset.callAsync(assetData, amount, txData);
+            const txHash = await (this as any).withdrawAsset.sendTransactionAsync(assetData, amount, txData);
+            return txHash;
+        },
    };
    public owner = {
        /**
@@ -1335,6 +1402,61 @@ export class ForwarderContract extends BaseContract {
            >(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            orders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            signatures: string[],
+            feeOrders: Array<{
+                makerAddress: string;
+                takerAddress: string;
+                feeRecipientAddress: string;
+                senderAddress: string;
+                makerAssetAmount: BigNumber;
+                takerAssetAmount: BigNumber;
+                makerFee: BigNumber;
+                takerFee: BigNumber;
+                expirationTimeSeconds: BigNumber;
+                salt: BigNumber;
+                makerAssetData: string;
+                takerAssetData: string;
+            }>,
+            feeSignatures: string[],
+            feePercentage: BigNumber,
+            feeRecipient: string,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).marketSellOrdersWithEth.callAsync(
+                orders,
+                signatures,
+                feeOrders,
+                feeSignatures,
+                feePercentage,
+                feeRecipient,
+                txData,
+            );
+            const txHash = await (this as any).marketSellOrdersWithEth.sendTransactionAsync(
+                orders,
+                signatures,
+                feeOrders,
+                feeSignatures,
+                feePercentage,
+                feeRecipient,
+                txData,
+            );
+            return txHash;
+        },
    };
    public transferOwnership = {
        /**
@@ -1479,6 +1601,11 @@ export class ForwarderContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    public static async deployFrom0xArtifactAsync(
        artifact: ContractArtifact | SimpleContractArtifact,
--- a/packages/abi-gen-wrappers/src/generated-wrappers/i_asset_proxy.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/i_asset_proxy.ts
@@ -178,6 +178,11 @@ export class IAssetProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).addAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).addAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    /**
     * Removes authorizion of an address.
@@ -330,6 +335,11 @@ export class IAssetProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(target: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).removeAuthorizedAddress.callAsync(target, txData);
+            const txHash = await (this as any).removeAuthorizedAddress.sendTransactionAsync(target, txData);
+            return txHash;
+        },
    };
    /**
     * Removes authorizion of an address.
@@ -520,6 +530,19 @@ export class IAssetProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            target: string,
+            index: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).removeAuthorizedAddressAtIndex.callAsync(target, index, txData);
+            const txHash = await (this as any).removeAuthorizedAddressAtIndex.sendTransactionAsync(
+                target,
+                index,
+                txData,
+            );
+            return txHash;
+        },
    };
    /**
     * Transfers assets. Either succeeds or throws.
@@ -746,6 +769,17 @@ export class IAssetProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(
+            assetData: string,
+            from: string,
+            to: string,
+            amount: BigNumber,
+            txData?: Partial<TxData> | undefined,
+        ): Promise<string> {
+            await (this as any).transferFrom.callAsync(assetData, from, to, amount, txData);
+            const txHash = await (this as any).transferFrom.sendTransactionAsync(assetData, from, to, amount, txData);
+            return txHash;
+        },
    };
    /**
     * Gets the proxy id associated with the proxy address.
@@ -1022,6 +1056,11 @@ export class IAssetProxyContract extends BaseContract {
            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<void>(returnData);
            return abiDecodedReturnData;
        },
+        async validateAndSendTransactionAsync(newOwner: string, txData?: Partial<TxData> | undefined): Promise<string> {
+            await (this as any).transferOwnership.callAsync(newOwner, txData);
+            const txHash = await (this as any).transferOwnership.sendTransactionAsync(newOwner, txData);
+            return txHash;
+        },
    };
    public static async deployFrom0xArtifactAsync(
        artifact: ContractArtifact | SimpleContractArtifact,
--- a/packages/abi-gen-wrappers/src/generated-wrappers/i_validator.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/i_validator.ts
@@ -38,7 +38,7 @@ export class IValidatorContract extends BaseContract {
         * @param hash Message hash that is signed.
         * @param signerAddress Address that should have signed the given hash.
         * @param signature Proof of signing.
-         * @returns Validity of order signature.
+         * @returns Magic bytes4 value if the signature is valid.         Magic value is bytes4(keccak256(&quot;isValidValidatorSignature(address,bytes32,address,bytes)&quot;))
         */
        async callAsync(
            hash: string,
@@ -46,7 +46,7 @@ export class IValidatorContract extends BaseContract {
            signature: string,
            callData: Partial<CallData> = {},
            defaultBlock?: BlockParam,
-        ): Promise<boolean> {
+        ): Promise<string> {
            assert.isString('hash', hash);
            assert.isString('signerAddress', signerAddress);
            assert.isString('signature', signature);
@@ -80,7 +80,7 @@ export class IValidatorContract extends BaseContract {
            BaseContract._throwIfRevertWithReasonCallResult(rawCallResult);
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,address,bytes)');
            // tslint:disable boolean-naming
-            const result = abiEncoder.strictDecodeReturnValue<boolean>(rawCallResult);
+            const result = abiEncoder.strictDecodeReturnValue<string>(rawCallResult);
            // tslint:enable boolean-naming
            return result;
        },
@@ -104,18 +104,18 @@ export class IValidatorContract extends BaseContract {
            ]);
            return abiEncodedTransactionData;
        },
-        getABIDecodedTransactionData(callData: string): boolean {
+        getABIDecodedTransactionData(callData: string): string {
            const self = (this as any) as IValidatorContract;
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,address,bytes)');
            // tslint:disable boolean-naming
-            const abiDecodedCallData = abiEncoder.strictDecode<boolean>(callData);
+            const abiDecodedCallData = abiEncoder.strictDecode<string>(callData);
            return abiDecodedCallData;
        },
-        getABIDecodedReturnData(returnData: string): boolean {
+        getABIDecodedReturnData(returnData: string): string {
            const self = (this as any) as IValidatorContract;
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,address,bytes)');
            // tslint:disable boolean-naming
-            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
+            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<string>(returnData);
            return abiDecodedReturnData;
        },
    };
@@ -207,8 +207,8 @@ export class IValidatorContract extends BaseContract {
                name: 'isValidSignature',
                outputs: [
                    {
-                        name: 'isValid',
-                        type: 'bool',
+                        name: '',
+                        type: 'bytes4',
                    },
                ],
                payable: false,
--- a/packages/abi-gen-wrappers/src/generated-wrappers/i_wallet.ts
+++ b/packages/abi-gen-wrappers/src/generated-wrappers/i_wallet.ts
@@ -37,14 +37,14 @@ export class IWalletContract extends BaseContract {
         * since they don't modify state.
         * @param hash Message hash that is signed.
         * @param signature Proof of signing.
-         * @returns Validity of order signature.
+         * @returns Magic bytes4 value if the signature is valid.         Magic value is bytes4(keccak256(&quot;isValidWalletSignature(bytes32,address,bytes)&quot;))
         */
        async callAsync(
            hash: string,
            signature: string,
            callData: Partial<CallData> = {},
            defaultBlock?: BlockParam,
-        ): Promise<boolean> {
+        ): Promise<string> {
            assert.isString('hash', hash);
            assert.isString('signature', signature);
            assert.doesConformToSchema('callData', callData, schemas.callDataSchema, [
@@ -73,7 +73,7 @@ export class IWalletContract extends BaseContract {
            BaseContract._throwIfRevertWithReasonCallResult(rawCallResult);
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,bytes)');
            // tslint:disable boolean-naming
-            const result = abiEncoder.strictDecodeReturnValue<boolean>(rawCallResult);
+            const result = abiEncoder.strictDecodeReturnValue<string>(rawCallResult);
            // tslint:enable boolean-naming
            return result;
        },
@@ -94,18 +94,18 @@ export class IWalletContract extends BaseContract {
            ]);
            return abiEncodedTransactionData;
        },
-        getABIDecodedTransactionData(callData: string): boolean {
+        getABIDecodedTransactionData(callData: string): string {
            const self = (this as any) as IWalletContract;
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,bytes)');
            // tslint:disable boolean-naming
-            const abiDecodedCallData = abiEncoder.strictDecode<boolean>(callData);
+            const abiDecodedCallData = abiEncoder.strictDecode<string>(callData);
            return abiDecodedCallData;
        },
-        getABIDecodedReturnData(returnData: string): boolean {
+        getABIDecodedReturnData(returnData: string): string {
            const self = (this as any) as IWalletContract;
            const abiEncoder = self._lookupAbiEncoder('isValidSignature(bytes32,bytes)');
            // tslint:disable boolean-naming
-            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<boolean>(returnData);
+            const abiDecodedReturnData = abiEncoder.strictDecodeReturnValue<string>(returnData);
            return abiDecodedReturnData;
        },
    };
@@ -193,8 +193,8 @@ export class IWalletContract extends BaseContract {
                name: 'isValidSignature',
                outputs: [
                    {
-                        name: 'isValid',
-                        type: 'bool',
+                        name: '',
+                        type: 'bytes4',
                    },
                ],
                payable: false,
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Jacob Evans	bbd3c03969	Publish - @0x/contracts-asset-proxy@2.2.6 - @0x/contracts-coordinator@2.0.11 - @0x/contracts-dev-utils@0.0.8 - @0x/contracts-erc1155@1.1.13 - @0x/contracts-erc20@2.2.12 - @0x/contracts-erc721@2.1.13 - @0x/contracts-exchange-forwarder@3.0.10 - @0x/contracts-exchange-libs@3.0.6 - @0x/contracts-exchange@2.1.12 - @0x/contracts-extensions@4.0.6 - @0x/contracts-multisig@3.1.12 - @0x/contracts-test-utils@3.1.14 - @0x/contracts-utils@3.2.2 - 0x.js@7.0.0 - @0x/abi-gen-templates@2.4.2 - @0x/abi-gen-wrappers@5.3.0 - @0x/abi-gen@4.1.1 - @0x/assert@2.1.4 - @0x/asset-buyer@6.1.12 - @0x/asset-swapper@1.0.2 - @0x/base-contract@5.3.2 - @0x/connect@5.0.17 - @0x/contract-addresses@3.1.0 - @0x/contract-artifacts@2.2.0 - @0x/contract-wrappers@11.1.0 - @0x/dev-utils@2.3.1 - @0x/fill-scenarios@3.0.17 - @0x/instant@1.0.29 - @0x/json-schemas@4.0.0 - @0x/migrations@4.3.0 - @0x/monorepo-scripts@1.0.35 - @0x/order-utils@8.3.0 - @0x/python-contract-wrappers@1.0.4 - @0x/sol-compiler@3.1.13 - @0x/sol-coverage@3.0.10 - @0x/sol-doc@2.0.17 - @0x/sol-profiler@3.1.12 - @0x/sol-trace@2.0.18 - @0x/sol-tracing-utils@6.0.17 - @0x/sra-spec@2.0.15 - @0x/subproviders@5.0.2 - @0x/testnet-faucets@1.0.85 - @0x/web3-wrapper@6.0.11 - @0x/website@0.0.88	2019-08-22 14:13:00 +10:00
Jacob Evans	a4405c3d39	Updated CHANGELOGS	2019-08-22 14:12:40 +10:00
Xianny	0fe4f587d8	update ethereumjs-blockstream 6.0.0 -> ^7.0.0 (#2089 )	2019-08-21 18:39:07 -07:00
Francesco Agosti	d3c714bd17	Merge pull request #2085 from 0xProject/feature/cfl-page-fix Fix small issue on mobile nav	2019-08-21 14:54:17 -07:00
fragosti	c399b7a7d5	Add Asset Swapper to footer	2019-08-21 14:30:55 -07:00
fragosti	b9234e94fb	Fix small issue on mobile nav	2019-08-21 14:30:55 -07:00
Francesco Agosti	417bb87785	Merge pull request #2081 from 0xProject/feature/cfl-page CFL page	2019-08-20 18:24:40 -07:00
fragosti	0233ae3134	Use Asset Swapper on CFL page	2019-08-20 17:48:57 -07:00
fragosti	eed0c5dd59	Distinguish between asset swapper page and docs	2019-08-20 17:39:15 -07:00
fragosti	2b3b167095	Fix path of asset swapper link in product dropdown	2019-08-20 17:30:15 -07:00
fragosti	5d91d19808	Disable jsx-curly-spacing on cfl page	2019-08-20 17:24:49 -07:00
fragosti	0f374ddee9	Change AssetBuyer to AssetSwapper on instant page	2019-08-20 17:08:03 -07:00
Chris Kalani	a65a9913cd	Fixed up some design nits and updated copy	2019-08-20 16:51:06 -07:00
fragosti	1ead32c666	Asset-Swapper -> asset-swapper	2019-08-20 15:35:39 -07:00
fragosti	d1af9fc780	use asset-swapper instead of Asset-Swapper	2019-08-20 15:31:50 -07:00
fragosti	0f06737fb6	Fix install prompt on mobile layout	2019-08-20 15:01:59 -07:00
fragosti	1676231532	Rename variables to be compatible with new backend	2019-08-20 14:36:57 -07:00
fragosti	b1caf697c8	Update titles and descriptions	2019-08-20 13:52:50 -07:00
fragosti	51481065fe	Fix jumping around of editor	2019-08-20 11:56:09 -07:00
fragosti	e367da710c	Fix massive i	2019-08-20 11:47:05 -07:00
fragosti	f493d6524d	Change to crypto algo-traders	2019-08-20 11:22:21 -07:00
fragosti	e1b85da2a7	Make terminal text selectable	2019-08-20 11:16:28 -07:00
F. Eugene Aumson	22c6548ed1	abi-gen/test-cli: rm expected-output; use git diff (#2079 ) * abi-gen/test-cli: rm expected-output; use git diff * abi-gen/test-cli: Simplify git diff test script * Remove abi-gen/test-cli/output from .gitignore	2019-08-20 14:08:54 -04:00
Fabio B	afb32c087d	Merge pull request #2017 from jangerritharms/fix/broken-validator-signatures Fix broken validator signatures	2019-08-20 18:44:50 +02:00
Jan-Gerrit Harms	bbc1ed1c64	Update test to adhere to v2.1 Validator revert	2019-08-20 14:53:10 +02:00
Jan-Gerrit Harms	3a46f1a27a	Merge branch 'development' into fix/broken-validator-signatures	2019-08-20 09:30:21 +02:00
Jacob Evans	90cd364780	Merge pull request #2078 from 0xProject/fix/isValidSignature-2.1 Update development to 2.1 isValidSignature with magic salt	2019-08-20 16:34:48 +10:00
Jacob Evans	6795e6f078	Update comments with bytes4 values	2019-08-20 16:15:44 +10:00
fragosti	cfb3404349	Fix dogfood link	2019-08-19 20:49:35 -07:00
fragosti	0212f3ee78	Run linter	2019-08-19 19:28:42 -07:00
fragosti	6b2995a4ee	Remove didError state from CFLmetrics component	2019-08-19 19:24:37 -07:00
fragosti	09e7ac54d4	Replace hummingbot link	2019-08-19 19:18:58 -07:00
fragosti	f69009d4a8	Add CFL to mobile dropdown and remove extensions for desktop	2019-08-19 19:16:26 -07:00
fragosti	206802ae33	Make layout more responsive	2019-08-19 19:08:48 -07:00
fragosti	91d4138fb8	Fix react key error	2019-08-19 18:22:17 -07:00
fragosti	cb455f951a	Add loading state to CFL metrics	2019-08-19 18:19:01 -07:00
fragosti	5f25d20cd0	Improve tooltip and copy	2019-08-19 17:54:10 -07:00
fragosti	1f0e2cd910	Add info tooltip	2019-08-19 17:46:11 -07:00
Jacob Evans	1749d02701	Add python linter exception	2019-08-20 10:30:09 +10:00
fragosti	55ace3179c	Add disclaimer component	2019-08-19 17:00:41 -07:00
fragosti	7866d9ccb4	Implement CFL metrics MVP	2019-08-19 16:52:40 -07:00
Brandon Millman	51f73d07fa	Merge pull request #2080 from 0xProject/feature/website/adding-michael Adding Michael Zhu to the team page	2019-08-19 13:02:18 -07:00
Francesco Agosti	63d84674ab	Merge pull request #2074 from 0xProject/feature/website/remove-faq Removing the old FAQ page and all references	2019-08-19 12:36:59 -07:00
Chris Kalani	14066997b2	Adding Michael Zhu to the team page	2019-08-19 12:34:19 -07:00
F. Eugene Aumson	28561e765a	Update README.md (#2077 ) * Update README.md * top-level README.md: explain Python dependency * top-level README.md: suggest node v6 OR v8	2019-08-19 13:55:06 -04:00
Jacob Evans	453fbbdc5d	Update python doc strings	2019-08-19 15:55:28 +10:00
Jacob Evans	1e1e5ec10d	Catch revert in IWallet/IValidator and return false	2019-08-19 15:45:32 +10:00
Jacob Evans	2088b0e459	Update python doc string	2019-08-19 15:13:09 +10:00
Jacob Evans	58400d9e01	Update python docs string	2019-08-19 14:40:46 +10:00
Jacob Evans	ac9375f1d2	Updated generated-wrappers?	2019-08-19 14:10:50 +10:00
Jacob Evans	db061c9355	Update Whitelist.sol	2019-08-19 12:15:46 +10:00
Jacob Evans	d5ce6c464b	Update Wallet signature test	2019-08-19 11:55:48 +10:00
Jacob Evans	b06205bb7f	Fix lint errors	2019-08-19 11:36:35 +10:00
Jacob Evans	f528a3e1de	Update Order-utils to check magic values	2019-08-19 11:14:35 +10:00
Jacob Evans	bddfdacfad	Update Interfaces for IValidator and IWallet	2019-08-19 11:08:06 +10:00
Jacob Evans	d3cdd3f235	Update development to 2.1 isValidSignature with magic salt	2019-08-19 10:35:26 +10:00
Chris Kalani	41ae45ea40	Fixed build error	2019-08-16 14:17:12 -07:00
Chris Kalani	657e0895ea	Removing the olf FAW page and all references	2019-08-16 13:56:03 -07:00
F. Eugene Aumson	0ae2d8bab5	sra_client.py: don't test against Python 2.7 (#2071 )	2019-08-16 13:32:59 -04:00
F. Eugene Aumson	3e0bd1f02d	Run CI in an environment that includes Python, and test generated code (#2072 ) * CI: use a docker image that includes Python So that tests of abi-gen generating Python can exercise the code being generated. * CI fix: disable old yarn permission denied hack Motivated by CI failure of previous commit. * CI fix: more resources for test-contracts-ganache Motivated by CI failure of previous commit. * CI fix: remove hack of permissions for python libs Fix for previous CI run's failure of test-python. Apparently we don't need this in the docker container we've switched to. * abi-gen/Py: minimum viable test of gen'd code Ensure the code is parseable by running it through black. * abi-gen/Py: expand Python linter usage Make abi-gen filter its output through black, if its available in the runtime environment. Accordingly, stop having contract_wrappers.py's setup.py pre_install run black on copied-over files. Adds Pylint to the list of linters run against test-cli/output. * abi-gen: re-enable Solidity linter It was broken, running seemingly cleanly but not actually reading any files, because it was targetting the wrong folder. * abi-gen/test-cli/fixtures/sol: fix linter errors * abi-gen/test-cli: disable pylint blackisted-name * abi-gen/Py: rm unused var in contracts w/o methods Remove unused variable from generated wrapper for contracts without any methods.	2019-08-16 13:32:31 -04:00
Jan-Gerrit Harms	b2592d1cc2	Removed the order-watcher files that were accidentally added	2019-08-16 14:02:32 +02:00
Jan-Gerrit Harms	aa3524c3b2	Merge branch 'development' into fix/broken-validator-signatures	2019-08-16 13:04:27 +02:00
Fabio B	35fcfb978d	Merge pull request #2054 from Arctek/fix/metamask-subprovider-hw subproviders: Change MetamaskSubprovider eth_sign to personal_sign	2019-08-16 12:08:10 +02:00
Fabio B	c68083cf03	Remove timestamp from latest entry	2019-08-16 12:07:45 +02:00
fragosti	39deb1a05f	Make it possible to show figure in hero on the bottom on mobile	2019-08-15 17:23:20 -07:00
fragosti	302d08e290	Make website mobile friendly	2019-08-15 17:01:50 -07:00
fragosti	05489dd7f1	Implement basic CFL landing page	2019-08-15 16:33:52 -07:00
fabioberger	cfb5119efc	Update abi-gen-wrappers	2019-08-16 00:51:00 +02:00
F. Eugene Aumson	5d53fa5635	contract_wrappers.py: bump version after publish (#2064 )	2019-08-15 16:34:31 -04:00
Xianny	38d2b70ba6	Update contract-wrappers everywhere (#2068 ) * add validateAndSendTransactionAsync to all wrappers * remove contract-wrappers from @0x/contracts-extensions * replace error types in contract-wrappers * upgrade asset-buyer and asset-swapper to contract-wrappers v11 * update website and 0x.js * remove calldataOptimizationUtils	2019-08-15 10:53:33 -07:00
Xianny	29d5db16c2	copy artifacts should not use python path anymore (#2070 )	2019-08-15 09:50:11 -07:00
Xianny	a8128c5772	Remove order-watcher (#2067 ) * remove order-watcher	2019-08-14 14:34:59 -07:00
Jan-Gerrit Harms	55bd076602	Merge branch 'development' into fix/broken-validator-signatures	2019-08-14 09:37:20 +02:00
Joshua Richardson	53a08d00fd	Merge branch 'development' of https://github.com/0xProject/0x-monorepo into fix/metamask-subprovider-hw	2019-08-14 12:29:44 +09:30
Joshua Richardson	fccec66463	Removed unrequired ethUtil import	2019-08-14 12:14:30 +09:30
Jacob Evans	bc26e807cd	Merge pull request #2060 from 0xProject/feature/dev-utils-contract-wrappers Added DevUtils Wrappers and migrations	2019-08-14 12:27:25 +10:00
Joshua Richardson	46dc37fb20	Update CHANGELOG.json	2019-08-14 11:40:02 +09:30
Jacob Evans	ccbb8400ee	Merge branch 'development' into feature/dev-utils-contract-wrappers	2019-08-14 11:42:18 +10:00
Jacob Evans	5d3d8a5332	Merge pull request #2061 from 0xProject/feature/python/dev-utils-contract-wrapper Add Python wrapper for DevUtils contract	2019-08-14 11:41:13 +10:00
Jan-Gerrit Harms	7a224fe08f	Merge branch 'development' into fix/broken-validator-signatures	2019-08-13 19:49:24 +02:00
F. Eugene Aumson	e045f5f74b	contract_wrappers.py: include DevUtils in docs	2019-08-13 12:16:20 -04:00
F. Eugene Aumson	e5c07ff0c5	abi-gen/Py: fix hanging indent for return val doc The update to the fixture contract's artifact added a bunch of `internalType` stuff. I'm not sure where that came from. Maybe newly generated by the latest version of solc?	2019-08-13 12:16:20 -04:00
F. Eugene Aumson	cdf0aa27e4	contract_wrappers.py: Merge CHANGELOG from dev Merge CHANGELOG updates from the development branch, in order to avoid merge conflicts.	2019-08-13 09:32:31 -04:00
F. Eugene Aumson	88998e6bb7	contract_wrappers.py: add DevUtils wrapper	2019-08-13 09:28:03 -04:00
F. Eugene Aumson	b885dfa606	Fixes for broken `tox` runs (#2053 ) * order_utils.py: git rm package.json This was used at one time, a long, long time ago, but is no longer used, and its presence actually causes problems when trying to do, eg `PKG=@0x/python-contract-wrappers yarn build` from within the order_utils directory. * order_utils.py: improve `./setup.py clean` * python-packages: in tox, test, don't lint * python-packages: update dev req's to fix tox runs * contract_wrappers.py: post-publish version bump	2019-08-13 09:18:16 -04:00
Jacob Evans	407495c278	Update packages/migrations/CHANGELOG.json Co-Authored-By: Fabio B <me@fabioberger.com>	2019-08-13 21:56:07 +10:00
Jacob Evans	ea50a94355	Update Mainnet	2019-08-13 21:40:38 +10:00
Jacob Evans	cb3318972e	Merge pull request #2044 from 0xProject/fix/sol-compiler-bin-publish Remove solc-bin from npm publish	2019-08-13 21:16:32 +10:00
Jacob Evans	c057ad7977	Update CHANGELOG	2019-08-13 14:46:53 +10:00
Jacob Evans	eb21718462	Added DevUtils Wrappers	2019-08-13 14:44:53 +10:00
Francesco Agosti	7836e10d8a	Merge pull request #2052 from 0xProject/feature/website/adding-oskar Added Oskar to team page	2019-08-12 10:15:19 -07:00
Francesco Agosti	946a31821d	Merge pull request #2050 from 0xProject/feature/website/privacy-policy Privacy Policy and Terms of Service pages	2019-08-12 10:10:55 -07:00
xianny	92a915f477	fix dependency version check	2019-08-12 09:27:51 -07:00
Jacob Evans	60b458dbfb	Merge pull request #2045 from 0xProject/feature/i-voted-tokens I Voted Tokens	2019-08-12 17:24:07 +10:00
Joshua Richardson	8b13efc89a	Fix for MetamaskSubprovider to use personal_sign over manually prefixing eth_sign, so proxied hardware wallets work (Ledger/Trezor).	2019-08-11 02:32:09 +09:30
Chris Kalani	88b625fa15	Added Oskar to team page	2019-08-09 17:28:12 -07:00
Chris Kalani	2cf9c9b7df	Added Terms of Service page and footer links	2019-08-09 16:52:09 -07:00
Chris Kalani	d179d6a1a2	Added Privacy Policy Page	2019-08-09 16:17:10 -07:00
F. Eugene Aumson	08502c1eb6	Pre-publish version updates (#2049 ) * json_schemas.py: make changelog be rev. chrono. Change CHANGELOG.md from chronological to reverse chronological. * json_schemas.py: fix version numbers It looks like the version number was changed in the past, but the new version was never published, so corrected that. Will publish after this merges into development. * order_utils.py: pre-publish version bump	2019-08-09 19:15:57 -04:00
F. Eugene Aumson	384cd47416	order_utils.py: mk `deprecated` a REAL dependency (#2048 )	2019-08-09 16:31:51 -04:00
Jan-Gerrit Harms	3bdeb82097	Updated CHANGELOG of 0x.js and @0x/order-watcher	2019-08-09 09:58:29 +02:00
Jan-Gerrit Harms	f49ab3f919	Merge branch 'development' into fix/broken-validator-signatures	2019-08-09 09:47:42 +02:00
Jan-Gerrit Harms	42d5bdd3ab	Explicitly check exchangeAddress definedness	2019-08-09 09:39:49 +02:00
Jan-Gerrit Harms	7228cbfe92	Pass exchangeAddress instead of SignatureOpts	2019-08-09 09:36:32 +02:00
Fabio B	250c46d6a4	Merge pull request #2046 from 0xProject/feature/python/publish-gend-wrappers-and-web3-v5 Pre-publish updates	2019-08-08 23:17:15 +02:00
F. Eugene Aumson	9ce71739f5	README.md: add 0x-contract-wrappers.py	2019-08-08 16:41:13 -04:00
F. Eugene Aumson	d69da38f7d	python-packages: bump version numbers for publish	2019-08-08 16:22:42 -04:00
F. Eugene Aumson	50f69f734f	contract_wrappers.py: fix `./setup.py clean`	2019-08-08 16:20:24 -04:00
F. Eugene Aumson	fc9c6c5434	contract_addresses.py: update CHANGELOG	2019-08-08 16:19:37 -04:00
F. Eugene Aumson	6e941be1e9	make CHANGELOG be REVERSE chronological	2019-08-08 16:18:32 -04:00
F. Eugene Aumson	9f677150a4	python-packages: add convenience script	2019-08-08 16:15:41 -04:00
F. Eugene Aumson	11e273337f	sra_client.py: add PyPI-required metadata	2019-08-08 16:11:37 -04:00
Jacob Evans	cc93532f4f	Add Images for I Voted tokens	2019-08-08 14:32:26 +10:00
Jacob Evans	37cc40521c	Remove solc-bin from npm publish	2019-08-08 11:51:22 +10:00
Jan-Gerrit Harms	11e2fc5bc4	Added documentation for additional parameters	2019-07-30 15:18:08 +02:00
Jan-Gerrit Harms	3e88f820b8	Prettified changelog	2019-07-30 15:11:24 +02:00
Jan-Gerrit Harms	163750f8c2	Updated internal usages of isValidSignatureAsync	2019-07-30 14:52:35 +02:00
Jan-Gerrit Harms	4aabc5d791	Fixed merge conflict in changelog	2019-07-30 14:43:24 +02:00
Jan-Gerrit Harms	c9a7b9dcc1	Appended to changelog in the order-utils package	2019-07-30 14:35:11 +02:00
Jan-Gerrit Harms	98075b5653	Revert "Updated changelog" This reverts commit `57ae5be916`.	2019-07-30 14:32:27 +02:00
Jan-Gerrit Harms	57ae5be916	Updated changelog	2019-07-30 14:26:46 +02:00
Jan-Gerrit Harms	8caf62997f	Forgot formatting again	2019-07-30 13:26:27 +02:00
Jan-Gerrit Harms	f8656ad376	Added integration tests and fixed another bug	2019-07-30 13:25:36 +02:00
Jan-Gerrit Harms	29c6c2a2ad	Add exports to 0x.js	2019-07-30 10:15:41 +02:00
Jan-Gerrit Harms	f2db67ef02	Fixed prettier errors	2019-07-30 09:50:54 +02:00
Jan-Gerrit Harms	72b8ef33d9	Fixes #1998 , still needs Integration testing	2019-07-29 21:39:21 +02:00
				`@@ -0,0 +1 @@`
				`/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/Python`