56 files changed, 371 insertions, 8 deletions
diff --git a/.circleci/config.yml b/.circleci/config.yml
index cd6065fb9..248a308dc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -49,6 +49,7 @@ jobs:
             - run: yarn wsrun test:circleci @0x/contracts-extensions
             - run: yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: yarn wsrun test:circleci @0x/contracts-exchange
+            - run: yarn wsrun test:circleci @0x/contracts-exchange-forwarder
     test-contracts-geth:
         docker:
             - image: circleci/node:9-browsers
@@ -68,6 +69,7 @@ jobs:
             - run: yarn wsrun test:circleci @0x/contracts-extensions
             - run: yarn wsrun test:circleci @0x/contracts-asset-proxy
             - run: yarn wsrun test:circleci @0x/contracts-exchange
+            - run: yarn wsrun test:circleci @0x/contracts-exchange-forwarder
     test-publish:
         resource_class: medium+
         docker:
diff --git a/.gitignore b/.gitignore
index 997f8b2b2..f055a9398 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,6 +91,7 @@ contracts/exchange-libs/generated-artifacts/
 contracts/erc20/generated-artifacts/
 contracts/erc721/generated-artifacts/
 contracts/extensions/generated-artifacts/
+contracts/exchange-forwarder/generated-artifacts/
 packages/sol-tracing-utils/test/fixtures/artifacts/
 packages/metacoin/artifacts/
 
@@ -104,6 +105,7 @@ contracts/exchange-libs/generated-wrappers/
 contracts/erc20/generated-wrappers/
 contracts/erc721/generated-wrappers/
 contracts/extensions/generated-wrappers/
+contracts/exchange-forwarder/generated-wrappers/
 packages/metacoin/src/contract_wrappers
 
 # solc-bin in sol-compiler
diff --git a/.prettierignore b/.prettierignore
index 00d36575c..a72b5ed2a 100644
--- a/.prettierignore
+++ b/.prettierignore
@@ -16,6 +16,8 @@ lib
 /contracts/erc721/generated-artifacts
 /contracts/extensions/generated-wrappers
 /contracts/extensions/generated-artifacts
+/contracts/exchange-forwarder/generated-wrappers
+/contracts/exchange-forwarder/generated-artifacts
 /packages/abi-gen-wrappers/src/generated-wrappers
 /packages/contract-artifacts/artifacts
 /python-packages/contract_artifacts/src/zero_ex/contract_artifacts/artifacts
diff --git a/contracts/exchange-forwarder/CHANGELOG.json b/contracts/exchange-forwarder/CHANGELOG.json
new file mode 100644
index 000000000..920fef05a
--- /dev/null
+++ b/contracts/exchange-forwarder/CHANGELOG.json
@@ -0,0 +1,74 @@
+[
+    {
+        "version": "2.0.0",
+        "changes": [
+            {
+                "note": "Upgrade the bignumber.js to v8.0.2",
+                "pr": 1517
+            }
+        ]
+    },
+    {
+        "timestamp": 1547747677,
+        "version": "1.2.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1547561734,
+        "version": "1.2.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1547225310,
+        "version": "1.2.1",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "version": "1.2.0",
+        "changes": [
+            {
+                "note": "Added Dutch Auction Wrapper",
+                "pr": 1465
+            }
+        ],
+        "timestamp": 1547040760
+    },
+    {
+        "version": "1.1.0",
+        "changes": [
+            {
+                "note": "Added Balance Threshold Filter",
+                "pr": 1383
+            },
+            {
+                "note": "Add OrderMatcher",
+                "pr": 1117
+            },
+            {
+                "note": "Add OrderValidator",
+                "pr": 1464
+            }
+        ]
+    },
+    {
+        "timestamp": 1544741676,
+        "version": "1.0.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    }
+]
diff --git a/contracts/exchange-forwarder/CHANGELOG.md b/contracts/exchange-forwarder/CHANGELOG.md
new file mode 100644
index 000000000..94ffdfb67
--- /dev/null
+++ b/contracts/exchange-forwarder/CHANGELOG.md
@@ -0,0 +1,32 @@
+<!--
+changelogUtils.file is auto-generated using the monorepo-scripts package. Don't edit directly.
+Edit the package's CHANGELOG.json file only.
+-->
+
+CHANGELOG
+
+## v1.2.3 - _January 17, 2019_
+
+    * Dependencies updated
+
+## v1.2.2 - _January 15, 2019_
+
+    * Dependencies updated
+
+## v1.2.1 - _January 11, 2019_
+
+    * Dependencies updated
+
+## v1.2.0 - _January 9, 2019_
+
+    * Added Dutch Auction Wrapper (#1465)
+
+## v1.1.0 - _Invalid date_
+
+    * Added Balance Threshold Filter (#1383)
+    * Add OrderMatcher (#1117)
+    * Add OrderValidator (#1464)
+
+## v1.0.2 - _December 13, 2018_
+
+    * Dependencies updated
diff --git a/contracts/exchange-forwarder/DEPLOYS.json b/contracts/exchange-forwarder/DEPLOYS.json
new file mode 100644
index 000000000..1a093bf77
--- /dev/null
+++ b/contracts/exchange-forwarder/DEPLOYS.json
@@ -0,0 +1,31 @@
+[
+    {
+        "name": "Forwarder",
+        "version": "1.1.0",
+        "changes": [
+            {
+                "note": "Round up when calculating remaining amounts in marketBuy functions",
+                "pr": 1162,
+                "networks": {
+                    "1": "0x5468a1dc173652ee28d249c271fa9933144746b1",
+                    "3": "0x2240dab907db71e64d3e0dba4800c83b5c502d4e",
+                    "42": "0x17992e4ffb22730138e4b62aaa6367fa9d3699a6"
+                }
+            }
+        ]
+    },
+    {
+        "name": "Forwarder",
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note": "protocol v2 deploy",
+                "networks": {
+                    "1": "0x7afc2d5107af94c462a194d2c21b5bdd238709d6",
+                    "3": "0x3983e204b12b3c02fb0638caf2cd406a62e0ead3",
+                    "42": "0xd85e2fa7e7e252b27b01bf0d65c946959d2f45b8"
+                }
+            }
+        ]
+    }
+]
diff --git a/contracts/exchange-forwarder/README.md b/contracts/exchange-forwarder/README.md
new file mode 100644
index 000000000..820f6e78a
--- /dev/null
+++ b/contracts/exchange-forwarder/README.md
@@ -0,0 +1,69 @@
+## Contract extensions
+
+Smart contracts that implement extensions for the 0x protocol.
+
+## Usage
+
+Contract extensions of the protocol can be found in the [contracts](./contracts) directory. This directory contains contracts that interact with the 2.0.0 contracts and will be used in production, such as the [Forwarder](https://github.com/0xProject/0x-protocol-specification/blob/master/v2/forwarder-specification.md) contract.
+
+## Bug bounty
+
+A bug bounty for the 2.0.0 contracts is ongoing! Instructions can be found [here](https://0xproject.com/wiki#Bug-Bounty).
+
+## Contributing
+
+We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+
+For proposals regarding the 0x protocol's smart contract architecture, message format, or additional functionality, go to the [0x Improvement Proposals (ZEIPs)](https://github.com/0xProject/ZEIPs) repository and follow the contribution guidelines provided therein.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0x/contracts-extensions yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/contracts-extensions yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
+
+#### Testing options
+
+Contracts testing options like coverage, profiling, revert traces or backing node choosing - are described [here](../TESTING.md).
diff --git a/contracts/exchange-forwarder/compiler.json b/contracts/exchange-forwarder/compiler.json
new file mode 100644
index 000000000..b0237a519
--- /dev/null
+++ b/contracts/exchange-forwarder/compiler.json
@@ -0,0 +1,22 @@
+{
+    "artifactsDir": "./generated-artifacts",
+    "contractsDir": "./contracts",
+    "compilerSettings": {
+        "optimizer": {
+            "enabled": true,
+            "runs": 1000000
+        },
+        "outputSelection": {
+            "*": {
+                "*": [
+                    "abi",
+                    "evm.bytecode.object",
+                    "evm.bytecode.sourceMap",
+                    "evm.deployedBytecode.object",
+                    "evm.deployedBytecode.sourceMap"
+                ]
+            }
+        }
+    },
+    "contracts": ["Forwarder"]
+}
diff --git a/contracts/extensions/contracts/Forwarder/Forwarder.sol b/contracts/exchange-forwarder/contracts/src/Forwarder.sol
index 94dec40ed..94dec40ed 100644
--- a/contracts/extensions/contracts/Forwarder/Forwarder.sol
+++ b/contracts/exchange-forwarder/contracts/src/Forwarder.sol
diff --git a/contracts/extensions/contracts/Forwarder/MixinAssets.sol b/contracts/exchange-forwarder/contracts/src/MixinAssets.sol
index 330586ed9..330586ed9 100644
--- a/contracts/extensions/contracts/Forwarder/MixinAssets.sol
+++ b/contracts/exchange-forwarder/contracts/src/MixinAssets.sol
diff --git a/contracts/extensions/contracts/Forwarder/MixinExchangeWrapper.sol b/contracts/exchange-forwarder/contracts/src/MixinExchangeWrapper.sol
index c970c40cf..c970c40cf 100644
--- a/contracts/extensions/contracts/Forwarder/MixinExchangeWrapper.sol
+++ b/contracts/exchange-forwarder/contracts/src/MixinExchangeWrapper.sol
diff --git a/contracts/extensions/contracts/Forwarder/MixinForwarderCore.sol b/contracts/exchange-forwarder/contracts/src/MixinForwarderCore.sol
index b65e1f7ce..b65e1f7ce 100644
--- a/contracts/extensions/contracts/Forwarder/MixinForwarderCore.sol
+++ b/contracts/exchange-forwarder/contracts/src/MixinForwarderCore.sol
diff --git a/contracts/extensions/contracts/Forwarder/MixinWeth.sol b/contracts/exchange-forwarder/contracts/src/MixinWeth.sol
index 029924019..029924019 100644
--- a/contracts/extensions/contracts/Forwarder/MixinWeth.sol
+++ b/contracts/exchange-forwarder/contracts/src/MixinWeth.sol
diff --git a/contracts/extensions/contracts/Forwarder/interfaces/IAssets.sol b/contracts/exchange-forwarder/contracts/src/interfaces/IAssets.sol
index cebfd3706..cebfd3706 100644
--- a/contracts/extensions/contracts/Forwarder/interfaces/IAssets.sol
+++ b/contracts/exchange-forwarder/contracts/src/interfaces/IAssets.sol
diff --git a/contracts/extensions/contracts/Forwarder/interfaces/IForwarder.sol b/contracts/exchange-forwarder/contracts/src/interfaces/IForwarder.sol
index 6ce8a1d31..6ce8a1d31 100644
--- a/contracts/extensions/contracts/Forwarder/interfaces/IForwarder.sol
+++ b/contracts/exchange-forwarder/contracts/src/interfaces/IForwarder.sol
diff --git a/contracts/extensions/contracts/Forwarder/interfaces/IForwarderCore.sol b/contracts/exchange-forwarder/contracts/src/interfaces/IForwarderCore.sol
index 00009d3d5..00009d3d5 100644
--- a/contracts/extensions/contracts/Forwarder/interfaces/IForwarderCore.sol
+++ b/contracts/exchange-forwarder/contracts/src/interfaces/IForwarderCore.sol
diff --git a/contracts/extensions/contracts/Forwarder/libs/LibConstants.sol b/contracts/exchange-forwarder/contracts/src/libs/LibConstants.sol
index 3ff2a03e5..3ff2a03e5 100644
--- a/contracts/extensions/contracts/Forwarder/libs/LibConstants.sol
+++ b/contracts/exchange-forwarder/contracts/src/libs/LibConstants.sol
diff --git a/contracts/extensions/contracts/Forwarder/libs/LibForwarderErrors.sol b/contracts/exchange-forwarder/contracts/src/libs/LibForwarderErrors.sol
index 7a95b78a0..7a95b78a0 100644
--- a/contracts/extensions/contracts/Forwarder/libs/LibForwarderErrors.sol
+++ b/contracts/exchange-forwarder/contracts/src/libs/LibForwarderErrors.sol
diff --git a/contracts/extensions/contracts/Forwarder/mixins/MAssets.sol b/contracts/exchange-forwarder/contracts/src/mixins/MAssets.sol
index 1757b37fb..1757b37fb 100644
--- a/contracts/extensions/contracts/Forwarder/mixins/MAssets.sol
+++ b/contracts/exchange-forwarder/contracts/src/mixins/MAssets.sol
diff --git a/contracts/extensions/contracts/Forwarder/mixins/MExchangeWrapper.sol b/contracts/exchange-forwarder/contracts/src/mixins/MExchangeWrapper.sol
index 7439e8259..7439e8259 100644
--- a/contracts/extensions/contracts/Forwarder/mixins/MExchangeWrapper.sol
+++ b/contracts/exchange-forwarder/contracts/src/mixins/MExchangeWrapper.sol
diff --git a/contracts/extensions/contracts/Forwarder/mixins/MWeth.sol b/contracts/exchange-forwarder/contracts/src/mixins/MWeth.sol
index 15d66942f..15d66942f 100644
--- a/contracts/extensions/contracts/Forwarder/mixins/MWeth.sol
+++ b/contracts/exchange-forwarder/contracts/src/mixins/MWeth.sol
diff --git a/contracts/exchange-forwarder/package.json b/contracts/exchange-forwarder/package.json
new file mode 100644
index 000000000..3383df990
--- /dev/null
+++ b/contracts/exchange-forwarder/package.json
@@ -0,0 +1,86 @@
+{
+    "name": "@0x/contracts-exchange-forwarder",
+    "version": "1.2.3",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Smart contract extensions of 0x protocol",
+    "main": "lib/src/index.js",
+    "directories": {
+        "test": "test"
+    },
+    "scripts": {
+        "build": "yarn pre_build && tsc -b",
+        "build:ci": "yarn build",
+        "pre_build": "run-s compile generate_contract_wrappers",
+        "test": "yarn run_mocha",
+        "rebuild_and_test": "run-s build test",
+        "test:coverage": "SOLIDITY_COVERAGE=true run-s build run_mocha coverage:report:text coverage:report:lcov",
+        "test:profiler": "SOLIDITY_PROFILER=true run-s build run_mocha profiler:report:html",
+        "test:trace": "SOLIDITY_REVERT_TRACE=true run-s build run_mocha",
+        "run_mocha": "mocha --require source-map-support/register --require make-promises-safe 'lib/test/**/*.js' --timeout 100000 --bail --exit",
+        "compile": "sol-compiler",
+        "watch": "sol-compiler -w",
+        "clean": "shx rm -rf lib generated-artifacts generated-wrappers",
+        "generate_contract_wrappers": "abi-gen --abis  ${npm_package_config_abis} --template ../../node_modules/@0x/abi-gen-templates/contract.handlebars --partials '../../node_modules/@0x/abi-gen-templates/partials/**/*.handlebars' --output generated-wrappers --backend ethers",
+        "lint": "tslint --format stylish --project . --exclude ./generated-wrappers/**/* --exclude ./generated-artifacts/**/* --exclude **/lib/**/* && yarn lint-contracts",
+        "coverage:report:text": "istanbul report text",
+        "coverage:report:html": "istanbul report html && open coverage/index.html",
+        "profiler:report:html": "istanbul report html && open coverage/index.html",
+        "coverage:report:lcov": "istanbul report lcov",
+        "test:circleci": "yarn test",
+        "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
+    },
+    "config": {
+        "abis": "generated-artifacts/@(Forwarder).json"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "license": "Apache-2.0",
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/contracts/extensions/README.md",
+    "devDependencies": {
+        "@0x/abi-gen": "^1.0.22",
+        "@0x/contract-wrappers": "^5.0.1",
+        "@0x/contracts-test-utils": "^2.0.1",
+        "@0x/dev-utils": "^1.0.24",
+        "@0x/sol-compiler": "^2.0.2",
+        "@0x/tslint-config": "^2.0.2",
+        "@types/lodash": "4.14.104",
+        "@types/node": "*",
+        "chai": "^4.0.1",
+        "chai-as-promised": "^7.1.0",
+        "chai-bignumber": "^3.0.0",
+        "dirty-chai": "^2.0.1",
+        "make-promises-safe": "^1.1.0",
+        "mocha": "^4.1.0",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "solhint": "^1.4.1",
+        "tslint": "5.11.0",
+        "typescript": "3.0.1"
+    },
+    "dependencies": {
+        "@0x/base-contract": "^3.0.13",
+        "@0x/contracts-asset-proxy": "^2.2.3",
+        "@0x/contracts-exchange-libs": "^1.0.6",
+        "@0x/contracts-exchange": "^2.2.3",
+        "@0x/contracts-erc20": "^1.0.6",
+        "@0x/contracts-erc721": "^1.0.6",
+        "@0x/contracts-utils": "^1.0.6",
+        "@0x/order-utils": "^3.1.2",
+        "@0x/types": "^1.5.2",
+        "@0x/typescript-typings": "^3.0.8",
+        "@0x/utils": "^3.0.1",
+        "@0x/web3-wrapper": "^3.2.4",
+        "ethereum-types": "^1.1.6",
+        "lodash": "^4.17.5"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}
diff --git a/contracts/exchange-forwarder/src/artifacts/index.ts b/contracts/exchange-forwarder/src/artifacts/index.ts
new file mode 100644
index 000000000..f15dac49a
--- /dev/null
+++ b/contracts/exchange-forwarder/src/artifacts/index.ts
@@ -0,0 +1,7 @@
+import { ContractArtifact } from 'ethereum-types';
+
+import * as Forwarder from '../../generated-artifacts/Forwarder.json';
+
+export const artifacts = {
+    Forwarder: Forwarder as ContractArtifact,
+};
diff --git a/contracts/exchange-forwarder/src/index.ts b/contracts/exchange-forwarder/src/index.ts
new file mode 100644
index 000000000..ba813e7ca
--- /dev/null
+++ b/contracts/exchange-forwarder/src/index.ts
@@ -0,0 +1,3 @@
+export * from './artifacts';
+export * from './wrappers';
+export * from '../test/utils';
diff --git a/contracts/exchange-forwarder/src/wrappers/index.ts b/contracts/exchange-forwarder/src/wrappers/index.ts
new file mode 100644
index 000000000..89dff9e74
--- /dev/null
+++ b/contracts/exchange-forwarder/src/wrappers/index.ts
@@ -0,0 +1 @@
+export * from '../../generated-wrappers/forwarder';
diff --git a/contracts/extensions/test/forwarder.ts b/contracts/exchange-forwarder/test/forwarder.ts
index 24c219563..24c219563 100644
--- a/contracts/extensions/test/forwarder.ts
+++ b/contracts/exchange-forwarder/test/forwarder.ts
diff --git a/contracts/exchange-forwarder/test/global_hooks.ts b/contracts/exchange-forwarder/test/global_hooks.ts
new file mode 100644
index 000000000..f8ace376a
--- /dev/null
+++ b/contracts/exchange-forwarder/test/global_hooks.ts
@@ -0,0 +1,17 @@
+import { env, EnvVars } from '@0x/dev-utils';
+
+import { coverage, profiler, provider } from '@0x/contracts-test-utils';
+before('start web3 provider', () => {
+    provider.start();
+});
+after('generate coverage report', async () => {
+    if (env.parseBoolean(EnvVars.SolidityCoverage)) {
+        const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
+        await coverageSubprovider.writeCoverageAsync();
+    }
+    if (env.parseBoolean(EnvVars.SolidityProfiler)) {
+        const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+        await profilerSubprovider.writeProfilerOutputAsync();
+    }
+    provider.stop();
+});
diff --git a/contracts/extensions/test/utils/forwarder_wrapper.ts b/contracts/exchange-forwarder/test/utils/forwarder_wrapper.ts
index 207106852..207106852 100644
--- a/contracts/extensions/test/utils/forwarder_wrapper.ts
+++ b/contracts/exchange-forwarder/test/utils/forwarder_wrapper.ts
diff --git a/contracts/exchange-forwarder/test/utils/index.ts b/contracts/exchange-forwarder/test/utils/index.ts
new file mode 100644
index 000000000..d290ec75d
--- /dev/null
+++ b/contracts/exchange-forwarder/test/utils/index.ts
@@ -0,0 +1 @@
+export * from './forwarder_wrapper';
diff --git a/contracts/exchange-forwarder/tsconfig.json b/contracts/exchange-forwarder/tsconfig.json
new file mode 100644
index 000000000..cd80b5a5f
--- /dev/null
+++ b/contracts/exchange-forwarder/tsconfig.json
@@ -0,0 +1,11 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": ".",
+        "resolveJsonModule": true
+    },
+    "include": ["./src/**/*", "./test/**/*", "./generated-wrappers/**/*"],
+    "files": ["./generated-artifacts/Forwarder.json"],
+    "exclude": ["./deploy/solc/solc_bin"]
+}
diff --git a/contracts/exchange-forwarder/tslint.json b/contracts/exchange-forwarder/tslint.json
new file mode 100644
index 000000000..1bb3ac2a2
--- /dev/null
+++ b/contracts/exchange-forwarder/tslint.json
@@ -0,0 +1,6 @@
+{
+    "extends": ["@0x/tslint-config"],
+    "rules": {
+        "custom-no-magic-numbers": false
+    }
+}
diff --git a/contracts/extensions/compiler.json b/contracts/extensions/compiler.json
index 2bb468724..1dfaf7a05 100644
--- a/contracts/extensions/compiler.json
+++ b/contracts/extensions/compiler.json
@@ -18,5 +18,5 @@
             }
         }
     },
-    "contracts": ["BalanceThresholdFilter", "DutchAuction", "Forwarder", "OrderMatcher", "OrderValidator"]
+    "contracts": ["BalanceThresholdFilter", "DutchAuction", "OrderMatcher", "OrderValidator"]
 }
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/BalanceThresholdFilter.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/BalanceThresholdFilter.sol
index b6e14525d..b6e14525d 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/BalanceThresholdFilter.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/BalanceThresholdFilter.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/MixinBalanceThresholdFilterCore.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/MixinBalanceThresholdFilterCore.sol
index 68dabafeb..68dabafeb 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/MixinBalanceThresholdFilterCore.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/MixinBalanceThresholdFilterCore.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/MixinExchangeCalldata.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/MixinExchangeCalldata.sol
index f2c0caa57..f2c0caa57 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/MixinExchangeCalldata.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/MixinExchangeCalldata.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/interfaces/IBalanceThresholdFilterCore.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/interfaces/IBalanceThresholdFilterCore.sol
index 4a1bf1fb2..4a1bf1fb2 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/interfaces/IBalanceThresholdFilterCore.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/interfaces/IBalanceThresholdFilterCore.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/interfaces/IThresholdAsset.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/interfaces/IThresholdAsset.sol
index f78f9c2de..f78f9c2de 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/interfaces/IThresholdAsset.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/interfaces/IThresholdAsset.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol
index 1c840136b..1c840136b 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MBalanceThresholdFilterCore.sol
diff --git a/contracts/extensions/contracts/BalanceThresholdFilter/mixins/MExchangeCalldata.sol b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol
index 40536d820..40536d820 100644
--- a/contracts/extensions/contracts/BalanceThresholdFilter/mixins/MExchangeCalldata.sol
+++ b/contracts/extensions/contracts/src/BalanceThresholdFilter/mixins/MExchangeCalldata.sol
diff --git a/contracts/extensions/contracts/DutchAuction/DutchAuction.sol b/contracts/extensions/contracts/src/DutchAuction/DutchAuction.sol
index 7631880c0..7631880c0 100644
--- a/contracts/extensions/contracts/DutchAuction/DutchAuction.sol
+++ b/contracts/extensions/contracts/src/DutchAuction/DutchAuction.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/MixinAssets.sol b/contracts/extensions/contracts/src/OrderMatcher/MixinAssets.sol
index 65b36ea65..65b36ea65 100644
--- a/contracts/extensions/contracts/OrderMatcher/MixinAssets.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/MixinAssets.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/MixinMatchOrders.sol b/contracts/extensions/contracts/src/OrderMatcher/MixinMatchOrders.sol
index baf41f650..baf41f650 100644
--- a/contracts/extensions/contracts/OrderMatcher/MixinMatchOrders.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/MixinMatchOrders.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/OrderMatcher.sol b/contracts/extensions/contracts/src/OrderMatcher/OrderMatcher.sol
index 89a7f3c55..89a7f3c55 100644
--- a/contracts/extensions/contracts/OrderMatcher/OrderMatcher.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/OrderMatcher.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/interfaces/IAssets.sol b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IAssets.sol
index 9fcc0023a..9fcc0023a 100644
--- a/contracts/extensions/contracts/OrderMatcher/interfaces/IAssets.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IAssets.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/interfaces/IMatchOrders.sol b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IMatchOrders.sol
index 7e4a88df8..7e4a88df8 100644
--- a/contracts/extensions/contracts/OrderMatcher/interfaces/IMatchOrders.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IMatchOrders.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/interfaces/IOrderMatcher.sol b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IOrderMatcher.sol
index 5e5125dea..5e5125dea 100644
--- a/contracts/extensions/contracts/OrderMatcher/interfaces/IOrderMatcher.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/interfaces/IOrderMatcher.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/libs/LibConstants.sol b/contracts/extensions/contracts/src/OrderMatcher/libs/LibConstants.sol
index 77b72398f..77b72398f 100644
--- a/contracts/extensions/contracts/OrderMatcher/libs/LibConstants.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/libs/LibConstants.sol
diff --git a/contracts/extensions/contracts/OrderMatcher/mixins/MAssets.sol b/contracts/extensions/contracts/src/OrderMatcher/mixins/MAssets.sol
index 6ea7a3290..6ea7a3290 100644
--- a/contracts/extensions/contracts/OrderMatcher/mixins/MAssets.sol
+++ b/contracts/extensions/contracts/src/OrderMatcher/mixins/MAssets.sol
diff --git a/contracts/extensions/contracts/OrderValidator/OrderValidator.sol b/contracts/extensions/contracts/src/OrderValidator/OrderValidator.sol
index 3297a980f..3297a980f 100644
--- a/contracts/extensions/contracts/OrderValidator/OrderValidator.sol
+++ b/contracts/extensions/contracts/src/OrderValidator/OrderValidator.sol
diff --git a/contracts/extensions/package.json b/contracts/extensions/package.json
index 4395d1fac..e4adf6350 100644
--- a/contracts/extensions/package.json
+++ b/contracts/extensions/package.json
@@ -32,7 +32,7 @@
         "lint-contracts": "solhint -c ../.solhint.json contracts/**/**/**/**/*.sol"
     },
     "config": {
-        "abis": "generated-artifacts/@(BalanceThresholdFilter|DutchAuction|Forwarder|OrderMatcher|OrderValidator).json"
+        "abis": "generated-artifacts/@(BalanceThresholdFilter|DutchAuction|OrderMatcher|OrderValidator).json"
     },
     "repository": {
         "type": "git",
diff --git a/contracts/extensions/src/artifacts/index.ts b/contracts/extensions/src/artifacts/index.ts
index 329d0f3f3..f2aee4908 100644
--- a/contracts/extensions/src/artifacts/index.ts
+++ b/contracts/extensions/src/artifacts/index.ts
@@ -2,14 +2,12 @@ import { ContractArtifact } from 'ethereum-types';
 
 import * as BalanceThresholdFilter from '../../generated-artifacts/BalanceThresholdFilter.json';
 import * as DutchAuction from '../../generated-artifacts/DutchAuction.json';
-import * as Forwarder from '../../generated-artifacts/Forwarder.json';
 import * as OrderMatcher from '../../generated-artifacts/OrderMatcher.json';
 import * as OrderValidator from '../../generated-artifacts/OrderValidator.json';
 
 export const artifacts = {
     BalanceThresholdFilter: BalanceThresholdFilter as ContractArtifact,
     DutchAuction: DutchAuction as ContractArtifact,
-    Forwarder: Forwarder as ContractArtifact,
     OrderMatcher: OrderMatcher as ContractArtifact,
     OrderValidator: OrderValidator as ContractArtifact,
 };
diff --git a/contracts/extensions/src/wrappers/index.ts b/contracts/extensions/src/wrappers/index.ts
index 65aec3ccd..eed198524 100644
--- a/contracts/extensions/src/wrappers/index.ts
+++ b/contracts/extensions/src/wrappers/index.ts
@@ -1,5 +1,4 @@
 export * from '../../generated-wrappers/balance_threshold_filter';
 export * from '../../generated-wrappers/dutch_auction';
-export * from '../../generated-wrappers/forwarder';
 export * from '../../generated-wrappers/order_matcher';
 export * from '../../generated-wrappers/order_validator';
diff --git a/contracts/extensions/test/utils/index.ts b/contracts/extensions/test/utils/index.ts
index d5d529c11..6ba9a2300 100644
--- a/contracts/extensions/test/utils/index.ts
+++ b/contracts/extensions/test/utils/index.ts
@@ -1,3 +1,2 @@
 export * from './balance_threshold_wrapper';
 export * from './dutch_auction_test_wrapper';
-export * from './forwarder_wrapper';
diff --git a/contracts/extensions/tsconfig.json b/contracts/extensions/tsconfig.json
index ed9b4fbe1..0c06c6902 100644
--- a/contracts/extensions/tsconfig.json
+++ b/contracts/extensions/tsconfig.json
@@ -9,7 +9,6 @@
     "files": [
         "./generated-artifacts/BalanceThresholdFilter.json",
         "./generated-artifacts/DutchAuction.json",
-        "./generated-artifacts/Forwarder.json",
         "./generated-artifacts/OrderMatcher.json",
         "./generated-artifacts/OrderValidator.json"
     ],
diff --git a/contracts/utils/package.json b/contracts/utils/package.json
index a4800fec9..0b14ec7cf 100644
--- a/contracts/utils/package.json
+++ b/contracts/utils/package.json
@@ -51,6 +51,7 @@
         "@0x/tslint-config": "^2.0.2",
         "@types/lodash": "4.14.104",
         "@types/node": "*",
+        "@types/bn.js": "^4.11.0",
         "chai": "^4.0.1",
         "chai-as-promised": "^7.1.0",
         "chai-bignumber": "^3.0.0",
@@ -70,6 +71,7 @@
         "@0x/typescript-typings": "^3.0.8",
         "@0x/utils": "^3.0.1",
         "@0x/web3-wrapper": "^3.2.4",
+        "bn.js": "^4.11.8",
         "ethereum-types": "^1.1.6",
         "ethereumjs-util": "^5.1.1",
         "lodash": "^4.17.5"
diff --git a/package.json b/package.json
index 2e201f467..62b4c1c36 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
         "lint": "wsrun lint $PKG --fast-exit --parallel --exclude-missing"
     },
     "config": {
-        "contractsPackages": "@0x/contracts-asset-proxy @0x/contracts-erc20 @0x/contracts-erc721 @0x/contracts-exchange @0x/contracts-exchange-libs @0x/contracts-extensions @0x/contracts-multisig @0x/contracts-test-utils @0x/contracts-utils",
+        "contractsPackages": "@0x/contracts-asset-proxy @0x/contracts-erc20 @0x/contracts-erc721 @0x/contracts-exchange @0x/contracts-exchange-forwarder @0x/contracts-exchange-libs @0x/contracts-extensions @0x/contracts-multisig @0x/contracts-test-utils @0x/contracts-utils",
         "mnemonic": "concert load couple harbor equip island argue ramp clarify fence smart topic",
         "packagesWithDocPages": "0x.js connect json-schemas subproviders web3-wrapper contract-wrappers order-utils order-watcher sol-compiler sol-coverage sol-profiler sol-trace ethereum-types asset-buyer migrations"
     },