Publish

- @0x/contracts-asset-proxy@3.6.5
 - @0x/contracts-broker@1.1.13
 - @0x/contracts-coordinator@3.1.14
 - @0x/contracts-dev-utils@1.3.12
 - @0x/contracts-erc1155@2.1.14
 - @0x/contracts-erc20@3.2.8
 - @0x/contracts-erc721@3.1.14
 - @0x/contracts-exchange-forwarder@4.2.14
 - @0x/contracts-exchange-libs@4.3.14
 - @0x/contracts-exchange@3.2.14
 - @0x/contracts-extensions@6.2.8
 - @0x/contracts-integrations@2.7.8
 - @0x/contracts-multisig@4.1.14
 - @0x/contracts-staking@2.0.21
 - @0x/contracts-test-utils@5.3.11
 - @0x/contracts-utils@4.5.8
 - @0x/contracts-zero-ex@0.9.0
 - @0x/asset-swapper@5.1.0
 - @0x/contract-addresses@5.3.0
 - @0x/contract-artifacts@3.9.0
 - @0x/contract-wrappers-test@12.2.24
 - @0x/contract-wrappers@13.10.0
 - @0x/migrations@6.5.0
 - @0x/order-utils@10.4.6

README.md

@@ -8,7 +8,7 @@ This repository is a monorepo including the 0x protocol smart contracts and nume
 
 [website-url]: https://0x.org
 
-[![CircleCI](https://circleci.com/gh/0xProject/0x-monorepo.svg?style=svg&circle-token=61bf7cd8c9b4e11b132089dfcffdd1be277d1e0c)](https://circleci.com/gh/0xProject/0x-monorepo)
+[![CircleCI](https://circleci.com/gh/0xProject/protocol.svg?style=svg&circle-token=61bf7cd8c9b4e11b132089dfcffdd1be277d1e0c)](https://circleci.com/gh/0xProject/protocool)
 [![Coverage Status](https://coveralls.io/repos/github/0xProject/0x-monorepo/badge.svg?branch=development)](https://coveralls.io/github/0xProject/0x-monorepo?branch=development)
 [![Discord](https://img.shields.io/badge/chat-discord.chat-yellow.svg?style=flat)](https://discordapp.com/invite/d3FTX3M)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
@@ -92,7 +92,7 @@ yarn build
 To build a specific package:
 
 ```bash
-PKG=@0x/web3-wrapper yarn build
+PKG=@0x/contract-wrappers yarn build
 ```
 
 To build all contracts packages:
@@ -115,7 +115,7 @@ To watch a specific package and all it's dependent packages:
 PKG=[NPM_PACKAGE_NAME] yarn watch
 
 e.g
-PKG=@0x/web3-wrapper yarn watch
+PKG=@0x/contract-wrappers yarn watch
 ```
 
 ### Clean
@@ -143,7 +143,7 @@ yarn rebuild
 To re-build (clean & build) a specific package & it's deps:
 
 ```bash
-PKG=0x.js yarn rebuild
+PKG=@0x/contract-wrappers yarn rebuild
 ```
 
 ### Lint
@@ -157,7 +157,7 @@ yarn lint
 Lint a specific package:
 
 ```bash
-PKG=0x.js yarn lint
+PKG=@0x/contract-wrappers yarn lint
 ```
 
 ### Run Tests
@@ -171,7 +171,7 @@ yarn test
 Run a specific package's test:
 
 ```bash
-PKG=@0x/web3-wrapper yarn test
+PKG=@0x/contract-wrappers yarn test
 ```
 
 Run all contracts packages tests:

contracts/asset-proxy/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "3.6.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "3.6.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "3.6.3",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "3.6.2",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "3.6.1",

contracts/asset-proxy/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.6.5 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v3.6.4 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.6.3 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.6.2 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v3.6.1 - _October 28, 2020_
 
     * Dependencies updated

contracts/asset-proxy/contracts/src/bridges/ShellBridge.sol

@@ -51,16 +51,15 @@ contract ShellBridge is
         external
         returns (bytes4 success)
     {
-        // Decode the bridge data to get the `fromTokenAddress`.
+        // Decode the bridge data to get the `fromTokenAddress` and `pool`.
-        (address fromTokenAddress) = abi.decode(bridgeData, (address));
+        (address fromTokenAddress, address pool) = abi.decode(bridgeData, (address, address));
 
         uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));
-        IShell exchange = IShell(_getShellAddress());
         // Grant an allowance to the exchange to spend `fromTokenAddress` token.
-        LibERC20Token.approveIfBelow(fromTokenAddress, address(exchange), fromTokenBalance);
+        LibERC20Token.approveIfBelow(fromTokenAddress, pool, fromTokenBalance);
 
         // Try to sell all of this contract's `fromTokenAddress` token balance.
-        uint256 boughtAmount = exchange.originSwap(
+        uint256 boughtAmount = IShell(pool).originSwap(
             fromTokenAddress,
             toTokenAddress,
             fromTokenBalance,

contracts/asset-proxy/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-asset-proxy",
-    "version": "3.6.1",
+    "version": "3.6.5",
     "engines": {
         "node": ">=6.12"
     },
@@ -51,13 +51,13 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/protocol",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contract-wrappers": "^13.9.2",
+        "@0x/contract-wrappers": "^13.10.0",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
         "@types/lodash": "4.14.104",
@@ -79,16 +79,16 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-erc1155": "^2.1.10",
+        "@0x/contracts-erc1155": "^2.1.14",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "ethereum-types": "^3.3.3",
         "lodash": "^4.17.11"
     },

contracts/broker/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "1.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "1.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "1.1.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "1.1.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "1.1.9",

contracts/broker/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.1.13 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v1.1.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v1.1.11 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v1.1.10 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v1.1.9 - _October 28, 2020_
 
     * Dependencies updated

contracts/broker/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-broker",
-    "version": "1.1.9",
+    "version": "1.1.13",
     "engines": {
         "node": ">=6.12"
     },
@@ -51,20 +51,20 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/extensions",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/contracts-exchange": "^3.2.10",
+        "@0x/contracts-exchange": "^3.2.14",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -84,10 +84,10 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3"
     },
     "publishConfig": {

contracts/coordinator/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "3.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "3.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "3.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "3.1.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "3.1.10",

contracts/coordinator/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.1.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v3.1.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.1.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.1.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v3.1.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/coordinator/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-coordinator",
-    "version": "3.1.10",
+    "version": "3.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,17 +52,17 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/extensions",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -82,16 +82,16 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/assert": "^3.0.13",
+        "@0x/assert": "^3.0.17",
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contract-addresses": "^5.0.1",
+        "@0x/contract-addresses": "^5.3.0",
-        "@0x/contracts-exchange": "^3.2.10",
+        "@0x/contracts-exchange": "^3.2.14",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/json-schemas": "^5.2.3",
+        "@0x/json-schemas": "^5.3.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3",
         "http-status-codes": "^1.3.2"
     },

contracts/dev-utils/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "1.3.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "1.3.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "1.3.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "1.3.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "1.3.8",

contracts/dev-utils/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v1.3.12 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v1.3.11 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v1.3.10 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v1.3.9 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v1.3.8 - _October 28, 2020_
 
     * Dependencies updated

contracts/dev-utils/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-dev-utils",
-    "version": "1.3.8",
+    "version": "1.3.12",
     "engines": {
         "node": ">=6.12"
     },
@@ -41,17 +41,17 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/dev-utils",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/assert": "^3.0.13",
+        "@0x/assert": "^3.0.17",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3",
         "ethers": "~4.0.4",
         "npm-run-all": "^4.1.2",
@@ -63,7 +63,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
         "@types/node": "12.12.54"
     },
     "publishConfig": {

contracts/erc1155/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "2.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "2.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "2.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "2.1.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "2.1.10",

contracts/erc1155/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.1.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v2.1.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.1.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.1.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v2.1.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/erc1155/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc1155",
-    "version": "2.1.10",
+    "version": "2.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,14 +52,14 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/tokens",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
@@ -80,10 +80,10 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/erc20/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "3.2.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "3.2.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "3.2.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "3.2.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "3.2.4",

contracts/erc20/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.2.8 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v3.2.7 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.2.6 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.2.5 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v3.2.4 - _October 28, 2020_
 
     * Dependencies updated

contracts/erc20/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc20",
-    "version": "3.2.4",
+    "version": "3.2.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -51,18 +51,18 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/tokens",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -82,7 +82,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7"
+        "@0x/base-contract": "^6.2.11"
     },
     "publishConfig": {
         "access": "public"

contracts/erc721/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "3.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "3.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "3.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "3.1.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "3.1.10",

contracts/erc721/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.1.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v3.1.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.1.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.1.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v3.1.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/erc721/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-erc721",
-    "version": "3.1.10",
+    "version": "3.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,18 +52,18 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/tokens",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -84,7 +84,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7"
+        "@0x/base-contract": "^6.2.11"
     },
     "publishConfig": {
         "access": "public"

contracts/exchange-forwarder/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "4.2.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "4.2.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "4.2.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "4.2.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "4.2.10",

contracts/exchange-forwarder/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v4.2.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v4.2.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.2.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.2.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v4.2.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/exchange-forwarder/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-forwarder",
-    "version": "4.2.10",
+    "version": "4.2.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,25 +52,25 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/extensions",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-erc1155": "^2.1.10",
+        "@0x/contracts-erc1155": "^2.1.14",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/contracts-exchange": "^3.2.10",
+        "@0x/contracts-exchange": "^3.2.14",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -90,7 +90,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
         "@0x/typescript-typings": "^5.1.5",
         "ethereum-types": "^3.3.3"
     },

contracts/exchange-libs/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "4.3.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "4.3.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "4.3.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "4.3.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "4.3.10",

contracts/exchange-libs/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v4.3.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v4.3.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.3.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.3.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v4.3.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/exchange-libs/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange-libs",
-    "version": "4.3.10",
+    "version": "4.3.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,14 +52,14 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/libs",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
-        "@0x/subproviders": "^6.1.5",
+        "@0x/subproviders": "^6.1.9",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -80,13 +80,13 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3"
     },
     "publishConfig": {

contracts/exchange/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "3.2.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "3.2.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "3.2.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "3.2.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "3.2.10",

contracts/exchange/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v3.2.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v3.2.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.2.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v3.2.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v3.2.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/exchange/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-exchange",
-    "version": "3.2.10",
+    "version": "3.2.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,21 +52,21 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/protocol",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-multisig": "^4.1.10",
+        "@0x/contracts-multisig": "^4.1.14",
-        "@0x/contracts-staking": "^2.0.17",
+        "@0x/contracts-staking": "^2.0.21",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -88,13 +88,13 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-erc1155": "^2.1.10",
+        "@0x/contracts-erc1155": "^2.1.14",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "lodash": "^4.17.11"
     },
     "publishConfig": {

contracts/extensions/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "6.2.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "6.2.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "6.2.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "6.2.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "6.2.4",

contracts/extensions/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v6.2.8 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v6.2.7 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v6.2.6 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v6.2.5 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v6.2.4 - _October 28, 2020_
 
     * Dependencies updated

contracts/extensions/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-extensions",
-    "version": "6.2.4",
+    "version": "6.2.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -52,23 +52,23 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/extensions",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/contracts-exchange": "^3.2.10",
+        "@0x/contracts-exchange": "^3.2.14",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -90,8 +90,8 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
         "@0x/typescript-typings": "^5.1.5",
         "ethereum-types": "^3.3.3"
     },

contracts/integrations/CHANGELOG.json

@@ -1,4 +1,49 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "2.7.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604620645,
+        "version": "2.7.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "2.7.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "2.7.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "2.7.4",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "2.7.3",

contracts/integrations/CHANGELOG.md

@@ -5,6 +5,26 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.7.8 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v2.7.7 - _November 5, 2020_
+
+    * Dependencies updated
+
+## v2.7.6 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.7.5 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.7.4 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v2.7.3 - _October 28, 2020_
 
     * Dependencies updated

contracts/integrations/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-integrations",
-    "version": "2.7.3",
+    "version": "2.7.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -51,24 +51,24 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/extensions",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contract-addresses": "^5.0.1",
+        "@0x/contract-addresses": "^5.3.0",
-        "@0x/contract-wrappers": "^13.9.2",
+        "@0x/contract-wrappers": "^13.10.0",
-        "@0x/contracts-broker": "^1.1.9",
+        "@0x/contracts-broker": "^1.1.13",
-        "@0x/contracts-coordinator": "^3.1.10",
+        "@0x/contracts-coordinator": "^3.1.14",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-exchange-forwarder": "^4.2.10",
+        "@0x/contracts-exchange-forwarder": "^4.2.14",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-extensions": "^6.2.4",
+        "@0x/contracts-extensions": "^6.2.8",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
         "@0x/coordinator-server": "^1.0.5",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/migrations": "^6.4.4",
+        "@0x/migrations": "^6.5.0",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@azure/core-asynciterator-polyfill": "^1.0.0",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
@@ -91,21 +91,21 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/asset-swapper": "^4.8.1",
+        "@0x/asset-swapper": "^5.1.0",
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-erc1155": "^2.1.10",
+        "@0x/contracts-erc1155": "^2.1.14",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-erc721": "^3.1.10",
+        "@0x/contracts-erc721": "^3.1.14",
-        "@0x/contracts-exchange": "^3.2.10",
+        "@0x/contracts-exchange": "^3.2.14",
-        "@0x/contracts-multisig": "^4.1.10",
+        "@0x/contracts-multisig": "^4.1.14",
-        "@0x/contracts-staking": "^2.0.17",
+        "@0x/contracts-staking": "^2.0.21",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-zero-ex": "^0.5.1",
+        "@0x/contracts-zero-ex": "^0.9.0",
-        "@0x/subproviders": "^6.1.5",
+        "@0x/subproviders": "^6.1.9",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3",
         "ethereumjs-util": "^6.2.0",
         "lodash": "^4.17.11"

contracts/multisig/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "4.1.14",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "4.1.13",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "4.1.12",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "4.1.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "4.1.10",

contracts/multisig/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v4.1.14 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v4.1.13 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.1.12 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.1.11 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v4.1.10 - _October 28, 2020_
 
     * Dependencies updated

contracts/multisig/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-multisig",
-    "version": "4.1.10",
+    "version": "4.1.14",
     "engines": {
         "node": ">=6.12"
     },
@@ -49,18 +49,18 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/multisig",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
         "@types/node": "12.12.54",
@@ -78,7 +78,7 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
         "@0x/typescript-typings": "^5.1.5",
         "ethereum-types": "^3.3.3"
     },

contracts/staking/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "2.0.21",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "2.0.20",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "2.0.19",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "2.0.18",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "2.0.17",

contracts/staking/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v2.0.21 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v2.0.20 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.0.19 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v2.0.18 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v2.0.17 - _October 28, 2020_
 
     * Dependencies updated

contracts/staking/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-staking",
-    "version": "2.0.17",
+    "version": "2.0.21",
     "engines": {
         "node": ">=6.12"
     },
@@ -53,20 +53,20 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/tokens",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-asset-proxy": "^3.6.1",
+        "@0x/contracts-asset-proxy": "^3.6.5",
-        "@0x/contracts-dev-utils": "^1.3.8",
+        "@0x/contracts-dev-utils": "^1.3.12",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-exchange-libs": "^4.3.10",
+        "@0x/contracts-exchange-libs": "^4.3.14",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-utils": "^4.5.4",
+        "@0x/contracts-utils": "^4.5.8",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/lodash": "4.14.104",
         "@types/node": "12.12.54",
         "chai": "^4.0.1",
@@ -87,10 +87,10 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "ethereum-types": "^3.3.3",
         "ethereumjs-util": "^5.1.1"
     },

contracts/test-utils/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "5.3.11",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "5.3.10",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "5.3.9",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "5.3.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "5.3.7",

contracts/test-utils/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v5.3.11 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v5.3.10 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v5.3.9 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v5.3.8 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v5.3.7 - _October 28, 2020_
 
     * Dependencies updated

contracts/test-utils/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-test-utils",
-    "version": "5.3.7",
+    "version": "5.3.11",
     "engines": {
         "node": ">=6.12"
     },
@@ -34,7 +34,7 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/test-utils",
     "devDependencies": {
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/tslint-config": "^4.1.3",
         "npm-run-all": "^4.1.2",
         "shx": "^0.2.2",
@@ -42,20 +42,20 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/assert": "^3.0.13",
+        "@0x/assert": "^3.0.17",
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/contract-addresses": "^5.0.1",
+        "@0x/contract-addresses": "^5.3.0",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/json-schemas": "^5.2.3",
+        "@0x/json-schemas": "^5.3.3",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-coverage": "^4.0.14",
+        "@0x/sol-coverage": "^4.0.18",
-        "@0x/sol-profiler": "^4.1.4",
+        "@0x/sol-profiler": "^4.1.8",
-        "@0x/sol-trace": "^3.0.14",
+        "@0x/sol-trace": "^3.0.18",
-        "@0x/subproviders": "^6.1.5",
+        "@0x/subproviders": "^6.1.9",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/bn.js": "^4.11.0",
         "@types/js-combinatorics": "^0.5.29",
         "@types/lodash": "4.14.104",

contracts/utils/CHANGELOG.json

@@ -1,4 +1,40 @@
 [
+    {
+        "timestamp": 1605302002,
+        "version": "4.5.8",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604385937,
+        "version": "4.5.7",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604376968,
+        "version": "4.5.6",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
+    {
+        "timestamp": 1604355662,
+        "version": "4.5.5",
+        "changes": [
+            {
+                "note": "Dependencies updated"
+            }
+        ]
+    },
     {
         "timestamp": 1603851023,
         "version": "4.5.4",

contracts/utils/CHANGELOG.md

@@ -5,6 +5,22 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v4.5.8 - _November 13, 2020_
+
+    * Dependencies updated
+
+## v4.5.7 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.5.6 - _November 3, 2020_
+
+    * Dependencies updated
+
+## v4.5.5 - _November 2, 2020_
+
+    * Dependencies updated
+
 ## v4.5.4 - _October 28, 2020_
 
     * Dependencies updated

contracts/utils/contracts/src/DeploymentConstants.sol

@@ -56,8 +56,6 @@ contract DeploymentConstants {
     address constant private MUSD_ADDRESS = 0xe2f2a5C287993345a840Db3B0845fbC70f5935a5;
     /// @dev Mainnet address of the Mooniswap Registry contract
     address constant private MOONISWAP_REGISTRY = 0x71CD6666064C3A1354a3B4dca5fA1E2D3ee7D303;
-    /// @dev Mainnet address of the Shell contract
-    address constant private SHELL_CONTRACT = 0x2E703D658f8dd21709a7B458967aB4081F8D3d05;
     /// @dev Mainnet address of the DODO Registry (ZOO) contract
     address constant private DODO_REGISTRY = 0x3A97247DF274a17C59A3bd12735ea3FcDFb49950;
     /// @dev Mainnet address of the DODO Helper contract
@@ -303,16 +301,6 @@ contract DeploymentConstants {
         return MOONISWAP_REGISTRY;
     }
 
-    /// @dev An overridable way to retrieve the Shell contract address.
-    /// @return registry The Shell contract address.
-    function _getShellAddress()
-        internal
-        view
-        returns (address)
-    {
-        return SHELL_CONTRACT;
-    }
-
     /// @dev An overridable way to retrieve the DODO Registry contract address.
     /// @return registry The DODO Registry contract address.
     function _getDODORegistryAddress()

contracts/utils/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-utils",
-    "version": "4.5.4",
+    "version": "4.5.8",
     "engines": {
         "node": ">=6.12"
     },
@@ -50,15 +50,15 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/utils",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/sol-compiler": "^4.2.3",
+        "@0x/sol-compiler": "^4.2.7",
         "@0x/tslint-config": "^4.1.3",
-        "@0x/types": "^3.2.4",
+        "@0x/types": "^3.3.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "@types/bn.js": "^4.11.0",
         "@types/lodash": "4.14.104",
         "@types/mocha": "^5.2.7",
@@ -79,9 +79,9 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
         "bn.js": "^4.11.8",
         "ethereum-types": "^3.3.3"
     },

contracts/zero-ex/CHANGELOG.json

@@ -1,4 +1,64 @@
 [
+    {
+        "version": "0.9.0",
+        "changes": [
+            {
+                "note": "Rewrite the ZeroEx contract in Yul",
+                "pr": 23
+            },
+            {
+                "note": "Update LiquidityProviderFeature to use off-chain registry and sandbox",
+                "pr": 16
+            },
+            {
+                "note": "Update ILiquidityProvider interface",
+                "pr": 16
+            },
+            {
+                "note": "Update ProtocolFeeUnfunded event to emit order hash",
+                "pr": 16
+            }
+        ],
+        "timestamp": 1605302002
+    },
+    {
+        "version": "0.8.0",
+        "changes": [
+            {
+                "note": "Trust LP boughtAmount return value",
+                "pr": 29
+            }
+        ],
+        "timestamp": 1604385937
+    },
+    {
+        "version": "0.7.0",
+        "changes": [
+            {
+                "note": "Change `ProtocolFeeUnfunded` event in FQT",
+                "pr": 28
+            },
+            {
+                "note": "Use new PLP interface in FQT.",
+                "pr": 28
+            }
+        ],
+        "timestamp": 1604376968
+    },
+    {
+        "version": "0.6.0",
+        "changes": [
+            {
+                "note": "Add support for collecting protocol fees in ETH or WETH",
+                "pr": 2
+            },
+            {
+                "note": "Add `LibSignature` library",
+                "pr": 21
+            }
+        ],
+        "timestamp": 1604355662
+    },
     {
         "timestamp": 1603851023,
         "version": "0.5.1",

contracts/zero-ex/CHANGELOG.md

@@ -5,6 +5,27 @@ Edit the package's CHANGELOG.json file only.
 
 CHANGELOG
 
+## v0.9.0 - _November 13, 2020_
+
+    * Rewrite the ZeroEx contract in Yul (#23)
+    * Update LiquidityProviderFeature to use off-chain registry and sandbox (#16)
+    * Update ILiquidityProvider interface (#16)
+    * Update ProtocolFeeUnfunded event to emit order hash (#16)
+
+## v0.8.0 - _November 3, 2020_
+
+    * Trust LP boughtAmount return value (#29)
+
+## v0.7.0 - _November 3, 2020_
+
+    * Change `ProtocolFeeUnfunded` event in FQT (#28)
+    * Use new PLP interface in FQT. (#28)
+
+## v0.6.0 - _November 2, 2020_
+
+    * Add support for collecting protocol fees in ETH or WETH (#2)
+    * Add `LibSignature` library (#21)
+
 ## v0.5.1 - _October 28, 2020_
 
     * Dependencies updated

contracts/zero-ex/contracts/src/IZeroEx.sol

@@ -44,14 +44,4 @@ interface IZeroEx is
 
     /// @dev Fallback for just receiving ether.
     receive() external payable;
-
-    // solhint-enable state-visibility
-
-    /// @dev Get the implementation contract of a registered function.
-    /// @param selector The function selector.
-    /// @return impl The implementation contract address.
-    function getFunctionImplementation(bytes4 selector)
-        external
-        view
-        returns (address impl);
 }

contracts/zero-ex/contracts/src/ZeroEx.sol

@@ -19,19 +19,12 @@
 pragma solidity ^0.6.5;
 pragma experimental ABIEncoderV2;
 
-import "@0x/contracts-utils/contracts/src/v06/LibBytesV06.sol";
-import "./migrations/LibBootstrap.sol";
 import "./features/BootstrapFeature.sol";
 import "./storage/LibProxyStorage.sol";
-import "./errors/LibProxyRichErrors.sol";
-
 
 /// @dev An extensible proxy contract that serves as a universal entry point for
 ///      interacting with the 0x protocol.
 contract ZeroEx {
-    // solhint-disable separate-by-one-line-in-contract,indent,var-name-mixedcase
-    using LibBytesV06 for bytes;
-
     /// @dev Construct this contract and register the `BootstrapFeature` feature.
     ///      After constructing this contract, `bootstrap()` should be called
     ///      by `bootstrap()` to seed the initial feature set.
@@ -44,48 +37,55 @@ contract ZeroEx {
             address(bootstrap);
     }
 
+
     // solhint-disable state-visibility
 
     /// @dev Forwards calls to the appropriate implementation contract.
     fallback() external payable {
-        bytes4 selector = msg.data.readBytes4(0);
+        // This is used in assembly below as impls_slot.
-        address impl = getFunctionImplementation(selector);
+        mapping(bytes4 => address) storage impls =
-        if (impl == address(0)) {
+            LibProxyStorage.getStorage().impls;
-            _revertWithData(LibProxyRichErrors.NotImplementedError(selector));
+
+        assembly {
+            let cdlen := calldatasize()
+
+            // equivalent of receive() external payable {}
+            if iszero(cdlen) {
+                return(0, 0)
+            }
+
+            // Store at 0x40, to leave 0x00-0x3F for slot calculation below.
+            calldatacopy(0x40, 0, cdlen)
+            let selector := and(mload(0x40), 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000)
+
+            // Slot for impls[selector] is keccak256(selector . impls_slot).
+            mstore(0, selector)
+            mstore(0x20, impls_slot)
+            let slot := keccak256(0, 0x40)
+
+            let delegate := sload(slot)
+            if iszero(delegate) {
+                // Revert with:
+                // abi.encodeWithSelector(
+                //   bytes4(keccak256("NotImplementedError(bytes4)")),
+                //   selector)
+                mstore(0, 0x734e6e1c00000000000000000000000000000000000000000000000000000000)
+                mstore(4, selector)
+                revert(0, 0x24)
+            }
+
+            let success := delegatecall(
+                gas(),
+                delegate,
+                0x40, cdlen,
+                0, 0
+            )
+            let rdlen := returndatasize()
+            returndatacopy(0, 0, rdlen)
+            if success {
+                return(0, rdlen)
+            }
+            revert(0, rdlen)
         }
-
-        (bool success, bytes memory resultData) = impl.delegatecall(msg.data);
-        if (!success) {
-            _revertWithData(resultData);
-        }
-        _returnWithData(resultData);
-    }
-
-    /// @dev Fallback for just receiving ether.
-    receive() external payable {}
-
-    // solhint-enable state-visibility
-
-    /// @dev Get the implementation contract of a registered function.
-    /// @param selector The function selector.
-    /// @return impl The implementation contract address.
-    function getFunctionImplementation(bytes4 selector)
-        public
-        view
-        returns (address impl)
-    {
-        return LibProxyStorage.getStorage().impls[selector];
-    }
-
-    /// @dev Revert with arbitrary bytes.
-    /// @param data Revert data.
-    function _revertWithData(bytes memory data) private pure {
-        assembly { revert(add(data, 32), mload(data)) }
-    }
-
-    /// @dev Return with arbitrary bytes.
-    /// @param data Return data.
-    function _returnWithData(bytes memory data) private pure {
-        assembly { return(add(data, 32), mload(data)) }
     }
 }

contracts/zero-ex/contracts/src/errors/LibLiquidityProviderRichErrors.sol

@@ -45,19 +45,4 @@ library LibLiquidityProviderRichErrors {
             minBuyAmount
         );
     }
-
-    function NoLiquidityProviderForMarketError(
-        address xAsset,
-        address yAsset
-    )
-        internal
-        pure
-        returns (bytes memory)
-    {
-        return abi.encodeWithSelector(
-            bytes4(keccak256("NoLiquidityProviderForMarketError(address,address)")),
-            xAsset,
-            yAsset
-        );
-    }
 }

contracts/zero-ex/contracts/src/errors/LibSignatureRichErrors.sol

@@ -26,7 +26,8 @@ library LibSignatureRichErrors {
         INVALID_LENGTH,
         UNSUPPORTED,
         ILLEGAL,
-        WRONG_SIGNER
+        WRONG_SIGNER,
+        BAD_SIGNATURE_DATA
     }
 
     // solhint-disable func-name-mixedcase
@@ -49,4 +50,19 @@ library LibSignatureRichErrors {
             signature
         );
     }
+
+    function SignatureValidationError(
+        SignatureValidationErrorCodes code,
+        bytes32 hash
+    )
+        internal
+        pure
+        returns (bytes memory)
+    {
+        return abi.encodeWithSelector(
+            bytes4(keccak256("SignatureValidationError(uint8,bytes32)")),
+            code,
+            hash
+        );
+    }
 }

contracts/zero-ex/contracts/src/external/FeeCollector.sol

@@ -0,0 +1,65 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "@0x/contracts-utils/contracts/src/v06/AuthorizableV06.sol";
+import "../vendor/v3/IStaking.sol";
+
+/// @dev The collector contract for protocol fees
+contract FeeCollector is AuthorizableV06 {
+    /// @dev Allow ether transfers to the collector.
+    receive() external payable { }
+
+    constructor() public {
+        _addAuthorizedAddress(msg.sender);
+    }
+
+    /// @dev   Approve the staking contract and join a pool. Only an authority
+    ///        can call this.
+    /// @param weth The WETH contract.
+    /// @param staking The staking contract.
+    /// @param poolId The pool ID this contract is collecting fees for.
+    function initialize(
+        IEtherTokenV06 weth,
+        IStaking staking,
+        bytes32 poolId
+    )
+        external
+        onlyAuthorized
+    {
+        weth.approve(address(staking), type(uint256).max);
+        staking.joinStakingPoolAsMaker(poolId);
+    }
+
+    /// @dev Convert all held ether to WETH. Only an authority can call this.
+    /// @param weth The WETH contract.
+    function convertToWeth(
+        IEtherTokenV06 weth
+    )
+        external
+        onlyAuthorized
+    {
+        // Leave 1 wei behind to avoid expensive zero-->non-zero state change.
+        if (address(this).balance > 1) {
+            weth.deposit{value: address(this).balance - 1}();
+        }
+    }
+}

contracts/zero-ex/contracts/src/external/ILiquidityProviderSandbox.sol

@@ -0,0 +1,74 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+
+interface ILiquidityProviderSandbox {
+
+    /// @dev Calls `sellTokenForToken` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellTokenForToken(
+        address provider,
+        address inputToken,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external;
+
+    /// @dev Calls `sellEthForToken` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellEthForToken(
+        address provider,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external;
+
+    /// @dev Calls `sellTokenForEth` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param inputToken The token being sold.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of ETH to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellTokenForEth(
+        address provider,
+        address inputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external;
+}

contracts/zero-ex/contracts/src/external/LiquidityProviderSandbox.sol

@@ -0,0 +1,139 @@
+/*
+  Copyright 2020 ZeroEx Intl.
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-utils/contracts/src/v06/errors/LibRichErrorsV06.sol";
+import "@0x/contracts-utils/contracts/src/v06/errors/LibOwnableRichErrorsV06.sol";
+import "../vendor/ILiquidityProvider.sol";
+import "../vendor/v3/IERC20Bridge.sol";
+import "./ILiquidityProviderSandbox.sol";
+
+
+/// @dev A permissionless contract through which the ZeroEx contract can
+///      safely trigger a trade on an external `ILiquidityProvider` contract.
+contract LiquidityProviderSandbox is
+    ILiquidityProviderSandbox
+{
+    using LibRichErrorsV06 for bytes;
+
+    /// @dev Store the owner as an immutable.
+    address public immutable owner;
+
+    constructor(address owner_)
+        public
+    {
+        owner = owner_;
+    }
+
+    /// @dev Allows only the (immutable) owner to call a function.
+    modifier onlyOwner() virtual {
+        if (msg.sender != owner) {
+            LibOwnableRichErrorsV06.OnlyOwnerError(
+                msg.sender,
+                owner
+            ).rrevert();
+        }
+        _;
+    }
+
+    /// @dev Calls `sellTokenForToken` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellTokenForToken(
+        address provider,
+        address inputToken,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        onlyOwner
+        override
+    {
+        try ILiquidityProvider(provider).sellTokenForToken(
+            inputToken,
+            outputToken,
+            recipient,
+            minBuyAmount,
+            auxiliaryData
+        ) {} catch {
+            IERC20Bridge(provider).bridgeTransferFrom(
+                outputToken,
+                provider,
+                recipient,
+                minBuyAmount,
+                auxiliaryData
+            );
+        }
+    }
+
+    /// @dev Calls `sellEthForToken` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellEthForToken(
+        address provider,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        onlyOwner
+        override
+    {
+        ILiquidityProvider(provider).sellEthForToken(
+            outputToken,
+            recipient,
+            minBuyAmount,
+            auxiliaryData
+        );
+    }
+
+    /// @dev Calls `sellTokenForEth` on the given `provider` contract to
+    ///      trigger a trade.
+    /// @param provider The address of the on-chain liquidity provider.
+    /// @param inputToken The token being sold.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of ETH to buy.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    function executeSellTokenForEth(
+        address provider,
+        address inputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        onlyOwner
+        override
+    {
+        ILiquidityProvider(provider).sellTokenForEth(
+            inputToken,
+            payable(recipient),
+            minBuyAmount,
+            auxiliaryData
+        );
+    }
+}

contracts/zero-ex/contracts/src/features/ILiquidityProviderFeature.sol

@@ -22,45 +22,30 @@ pragma experimental ABIEncoderV2;
 
 /// @dev Feature to swap directly with an on-chain liquidity provider.
 interface ILiquidityProviderFeature {
-    event LiquidityProviderForMarketUpdated(
-        address indexed xAsset,
-        address indexed yAsset,
-        address providerAddress
-    );
 
+    /// @dev Sells `sellAmount` of `inputToken` to the liquidity provider
+    ///      at the given `provider` address.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param provider The address of the on-chain liquidity provider
+    ///        to trade with.
+    /// @param recipient The recipient of the bought tokens. If equal to
+    ///        address(0), `msg.sender` is assumed to be the recipient.
+    /// @param sellAmount The amount of `inputToken` to sell.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to
+    ///        buy. Reverts if this amount is not satisfied.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
     function sellToLiquidityProvider(
-        address makerToken,
+        address inputToken,
-        address takerToken,
+        address outputToken,
-        address payable recipient,
+        address payable provider,
+        address recipient,
         uint256 sellAmount,
-        uint256 minBuyAmount
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
     )
         external
         payable
         returns (uint256 boughtAmount);
-
-    /// @dev Sets address of the liquidity provider for a market given
-    ///      (xAsset, yAsset).
-    /// @param xAsset First asset managed by the liquidity provider.
-    /// @param yAsset Second asset managed by the liquidity provider.
-    /// @param providerAddress Address of the liquidity provider.
-    function setLiquidityProviderForMarket(
-        address xAsset,
-        address yAsset,
-        address providerAddress
-    )
-        external;
-
-    /// @dev Returns the address of the liquidity provider for a market given
-    ///     (xAsset, yAsset), or reverts if pool does not exist.
-    /// @param xAsset First asset managed by the liquidity provider.
-    /// @param yAsset Second asset managed by the liquidity provider.
-    /// @return providerAddress Address of the liquidity provider.
-    function getLiquidityProviderForMarket(
-        address xAsset,
-        address yAsset
-    )
-        external
-        view
-        returns (address providerAddress);
 }

contracts/zero-ex/contracts/src/features/ISimpleFunctionRegistryFeature.sol

@@ -57,4 +57,12 @@ interface ISimpleFunctionRegistryFeature {
         external
         view
         returns (address impl);
+
+    /// @dev Get the implementation contract of a registered function.
+    /// @param selector The function selector.
+    /// @return impl The implementation contract address.
+    function getFunctionImplementation(bytes4 selector)
+        external
+        view
+        returns (address impl);
 }

contracts/zero-ex/contracts/src/features/LiquidityProviderFeature.sol

@@ -20,15 +20,13 @@ pragma solidity ^0.6.5;
 pragma experimental ABIEncoderV2;
 
 import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
-import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
-import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
 import "@0x/contracts-utils/contracts/src/v06/errors/LibRichErrorsV06.sol";
 import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
 import "../errors/LibLiquidityProviderRichErrors.sol";
+import "../external/ILiquidityProviderSandbox.sol";
+import "../external/LiquidityProviderSandbox.sol";
 import "../fixins/FixinCommon.sol";
 import "../migrations/LibMigrate.sol";
-import "../storage/LibLiquidityProviderStorage.sol";
-import "../vendor/v3/IERC20Bridge.sol";
 import "./IFeature.sol";
 import "./ILiquidityProviderFeature.sol";
 import "./libs/LibTokenSpender.sol";
@@ -39,7 +37,6 @@ contract LiquidityProviderFeature is
     ILiquidityProviderFeature,
     FixinCommon
 {
-    using LibERC20TokenV06 for IERC20TokenV06;
     using LibSafeMathV06 for uint256;
     using LibRichErrorsV06 for bytes;
 
@@ -50,16 +47,24 @@ contract LiquidityProviderFeature is
 
     /// @dev ETH pseudo-token address.
     address constant internal ETH_TOKEN_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
-    /// @dev The WETH contract address.
+    /// @dev The sandbox contract address.
-    IEtherTokenV06 public immutable weth;
+    ILiquidityProviderSandbox public immutable sandbox;
 
-    /// @dev Store the WETH address in an immutable.
+    /// @dev Event for data pipeline.
-    /// @param weth_ The weth token.
+    event LiquidityProviderSwap(
-    constructor(IEtherTokenV06 weth_)
+        address inputToken,
+        address outputToken,
+        uint256 inputTokenAmount,
+        uint256 outputTokenAmount,
+        address provider,
+        address recipient
+    );
+
+    constructor(address zeroEx)
         public
         FixinCommon()
     {
-        weth = weth_;
+        sandbox = new LiquidityProviderSandbox(zeroEx);
     }
 
     /// @dev Initialize and register this feature.
@@ -70,131 +75,102 @@ contract LiquidityProviderFeature is
         returns (bytes4 success)
     {
         _registerFeatureFunction(this.sellToLiquidityProvider.selector);
-        _registerFeatureFunction(this.setLiquidityProviderForMarket.selector);
-        _registerFeatureFunction(this.getLiquidityProviderForMarket.selector);
         return LibMigrate.MIGRATE_SUCCESS;
     }
 
+    /// @dev Sells `sellAmount` of `inputToken` to the liquidity provider
+    ///      at the given `provider` address.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param provider The address of the on-chain liquidity provider
+    ///        to trade with.
+    /// @param recipient The recipient of the bought tokens. If equal to
+    ///        address(0), `msg.sender` is assumed to be the recipient.
+    /// @param sellAmount The amount of `inputToken` to sell.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to
+    ///        buy. Reverts if this amount is not satisfied.
+    /// @param auxiliaryData Auxiliary data supplied to the `provider` contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
     function sellToLiquidityProvider(
-        address makerToken,
+        address inputToken,
-        address takerToken,
+        address outputToken,
-        address payable recipient,
+        address payable provider,
+        address recipient,
         uint256 sellAmount,
-        uint256 minBuyAmount
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
     )
         external
         override
         payable
         returns (uint256 boughtAmount)
     {
-        address providerAddress = getLiquidityProviderForMarket(makerToken, takerToken);
         if (recipient == address(0)) {
             recipient = msg.sender;
         }
 
-        if (takerToken == ETH_TOKEN_ADDRESS) {
+        if (inputToken == ETH_TOKEN_ADDRESS) {
-            // Wrap ETH.
+            provider.transfer(sellAmount);
-            weth.deposit{value: sellAmount}();
-            weth.transfer(providerAddress, sellAmount);
         } else {
             LibTokenSpender.spendERC20Tokens(
-                IERC20TokenV06(takerToken),
+                IERC20TokenV06(inputToken),
                 msg.sender,
-                providerAddress,
+                provider,
                 sellAmount
             );
         }
 
-        if (makerToken == ETH_TOKEN_ADDRESS) {
+        if (inputToken == ETH_TOKEN_ADDRESS) {
-            uint256 balanceBefore = weth.balanceOf(address(this));
+            uint256 balanceBefore = IERC20TokenV06(outputToken).balanceOf(recipient);
-            IERC20Bridge(providerAddress).bridgeTransferFrom(
+            sandbox.executeSellEthForToken(
-                address(weth),
+                provider,
-                address(0),
+                outputToken,
-                address(this),
-                minBuyAmount,
-                ""
-            );
-            boughtAmount = weth.balanceOf(address(this)).safeSub(balanceBefore);
-            // Unwrap wETH and send ETH to recipient.
-            weth.withdraw(boughtAmount);
-            recipient.transfer(boughtAmount);
-        } else {
-            uint256 balanceBefore = IERC20TokenV06(makerToken).balanceOf(recipient);
-            IERC20Bridge(providerAddress).bridgeTransferFrom(
-                makerToken,
-                address(0),
                 recipient,
                 minBuyAmount,
-                ""
+                auxiliaryData
             );
-            boughtAmount = IERC20TokenV06(makerToken).balanceOf(recipient).safeSub(balanceBefore);
+            boughtAmount = IERC20TokenV06(outputToken).balanceOf(recipient).safeSub(balanceBefore);
+        } else if (outputToken == ETH_TOKEN_ADDRESS) {
+            uint256 balanceBefore = recipient.balance;
+            sandbox.executeSellTokenForEth(
+                provider,
+                inputToken,
+                recipient,
+                minBuyAmount,
+                auxiliaryData
+            );
+            boughtAmount = recipient.balance.safeSub(balanceBefore);
+        } else {
+            uint256 balanceBefore = IERC20TokenV06(outputToken).balanceOf(recipient);
+            sandbox.executeSellTokenForToken(
+                provider,
+                inputToken,
+                outputToken,
+                recipient,
+                minBuyAmount,
+                auxiliaryData
+            );
+            boughtAmount = IERC20TokenV06(outputToken).balanceOf(recipient).safeSub(balanceBefore);
         }
+
         if (boughtAmount < minBuyAmount) {
             LibLiquidityProviderRichErrors.LiquidityProviderIncompleteSellError(
-                providerAddress,
+                provider,
-                makerToken,
+                outputToken,
-                takerToken,
+                inputToken,
                 sellAmount,
                 boughtAmount,
                 minBuyAmount
             ).rrevert();
         }
-    }
 
-    /// @dev Sets address of the liquidity provider for a market given
+        emit LiquidityProviderSwap(
-    ///      (xAsset, yAsset).
+            inputToken,
-    /// @param xAsset First asset managed by the liquidity provider.
+            outputToken,
-    /// @param yAsset Second asset managed by the liquidity provider.
+            sellAmount,
-    /// @param providerAddress Address of the liquidity provider.
+            boughtAmount,
-    function setLiquidityProviderForMarket(
+            provider,
-        address xAsset,
+            recipient
-        address yAsset,
-        address providerAddress
-    )
-        external
-        override
-        onlyOwner
-    {
-        LibLiquidityProviderStorage.getStorage()
-            .addressBook[xAsset][yAsset] = providerAddress;
-        LibLiquidityProviderStorage.getStorage()
-            .addressBook[yAsset][xAsset] = providerAddress;
-        emit LiquidityProviderForMarketUpdated(
-            xAsset,
-            yAsset,
-            providerAddress
         );
     }
-
-    /// @dev Returns the address of the liquidity provider for a market given
-    ///     (xAsset, yAsset), or reverts if pool does not exist.
-    /// @param xAsset First asset managed by the liquidity provider.
-    /// @param yAsset Second asset managed by the liquidity provider.
-    /// @return providerAddress Address of the liquidity provider.
-    function getLiquidityProviderForMarket(
-        address xAsset,
-        address yAsset
-    )
-        public
-        view
-        override
-        returns (address providerAddress)
-    {
-        if (xAsset == ETH_TOKEN_ADDRESS) {
-            providerAddress = LibLiquidityProviderStorage.getStorage()
-                .addressBook[address(weth)][yAsset];
-        } else if (yAsset == ETH_TOKEN_ADDRESS) {
-            providerAddress = LibLiquidityProviderStorage.getStorage()
-                .addressBook[xAsset][address(weth)];
-        } else {
-            providerAddress = LibLiquidityProviderStorage.getStorage()
-                .addressBook[xAsset][yAsset];
-        }
-        if (providerAddress == address(0)) {
-            LibLiquidityProviderRichErrors.NoLiquidityProviderForMarketError(
-                xAsset,
-                yAsset
-            ).rrevert();
-        }
-    }
 }

contracts/zero-ex/contracts/src/features/SimpleFunctionRegistryFeature.sol

@@ -56,6 +56,7 @@ contract SimpleFunctionRegistryFeature is
         // Register getters.
         _extend(this.getRollbackLength.selector, _implementation);
         _extend(this.getRollbackEntryAtIndex.selector, _implementation);
+        _extend(this.getFunctionImplementation.selector, _implementation);
         return LibBootstrap.BOOTSTRAP_SUCCESS;
     }
 
@@ -151,6 +152,18 @@ contract SimpleFunctionRegistryFeature is
         return LibSimpleFunctionRegistryStorage.getStorage().implHistory[selector][idx];
     }
 
+    /// @dev Get the implementation contract of a registered function.
+    /// @param selector The function selector.
+    /// @return impl The implementation contract address.
+    function getFunctionImplementation(bytes4 selector)
+        external
+        override
+        view
+        returns (address impl)
+    {
+        return LibProxyStorage.getStorage().impls[selector];
+    }
+
     /// @dev Register or replace a function.
     /// @param selector The function selector.
     /// @param impl The implementation contract for the function.

contracts/zero-ex/contracts/src/features/TransformERC20Feature.sol

@@ -58,7 +58,7 @@ contract TransformERC20Feature is
     /// @dev Name of this feature.
     string public constant override FEATURE_NAME = "TransformERC20";
     /// @dev Version of this feature.
-    uint256 public immutable override FEATURE_VERSION = _encodeVersion(1, 2, 0);
+    uint256 public immutable override FEATURE_VERSION = _encodeVersion(1, 3, 0);
 
     /// @dev Initialize and register this feature.
     ///      Should be delegatecalled by `Migrate.migrate()`.

contracts/zero-ex/contracts/src/features/UniswapFeature.sol

@@ -37,7 +37,7 @@ contract UniswapFeature is
     /// @dev Name of this feature.
     string public constant override FEATURE_NAME = "UniswapFeature";
     /// @dev Version of this feature.
-    uint256 public immutable override FEATURE_VERSION = _encodeVersion(1, 0, 0);
+    uint256 public immutable override FEATURE_VERSION = _encodeVersion(1, 1, 0);
     /// @dev WETH contract.
     IEtherTokenV06 private immutable WETH;
     /// @dev AllowanceTarget instance.

contracts/zero-ex/contracts/src/features/libs/LibSignature.sol

@@ -0,0 +1,151 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-utils/contracts/src/v06/errors/LibRichErrorsV06.sol";
+import "../../errors/LibSignatureRichErrors.sol";
+
+
+/// @dev A library for validating signatures.
+library LibSignature {
+    using LibRichErrorsV06 for bytes;
+
+    // '\x19Ethereum Signed Message:\n32\x00\x00\x00\x00' in a word.
+    uint256 private constant ETH_SIGN_HASH_PREFIX =
+        0x19457468657265756d205369676e6564204d6573736167653a0a333200000000;
+    /// @dev Exclusive upper limit on ECDSA signatures 'R' values.
+    ///      The valid range is given by fig (282) of the yellow paper.
+    uint256 private constant ECDSA_SIGNATURE_R_LIMIT =
+        uint256(0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141);
+    /// @dev Exclusive upper limit on ECDSA signatures 'S' values.
+    ///      The valid range is given by fig (283) of the yellow paper.
+    uint256 private constant ECDSA_SIGNATURE_S_LIMIT = ECDSA_SIGNATURE_R_LIMIT / 2 + 1;
+
+   /// @dev Allowed signature types.
+    enum SignatureType {
+        ILLEGAL,
+        INVALID,
+        EIP712,
+        ETHSIGN
+    }
+
+    /// @dev Encoded EC signature.
+    struct Signature {
+        // How to validate the signature.
+        SignatureType signatureType;
+        // EC Signature data.
+        uint8 v;
+        // EC Signature data.
+        bytes32 r;
+        // EC Signature data.
+        bytes32 s;
+    }
+
+    /// @dev Retrieve the signer of a signature.
+    ///      Throws if the signature can't be validated.
+    /// @param hash The hash that was signed.
+    /// @param signature The signature.
+    /// @return recovered The recovered signer address.
+    function getSignerOfHash(
+        bytes32 hash,
+        Signature memory signature
+    )
+        internal
+        pure
+        returns (address recovered)
+    {
+        // Ensure this is a signature type that can be validated against a hash.
+        _validateHashCompatibleSignature(hash, signature);
+
+        if (signature.signatureType == SignatureType.EIP712) {
+            // Signed using EIP712
+            recovered = ecrecover(
+                hash,
+                signature.v,
+                signature.r,
+                signature.s
+            );
+        } else if (signature.signatureType == SignatureType.ETHSIGN) {
+            // Signed using `eth_sign`
+            // Need to hash `hash` with "\x19Ethereum Signed Message:\n32" prefix
+            // in packed encoding.
+            bytes32 ethSignHash;
+            assembly {
+                // Use scratch space
+                mstore(0, ETH_SIGN_HASH_PREFIX) // length of 28 bytes
+                mstore(28, hash) // length of 32 bytes
+                ethSignHash := keccak256(0, 60)
+            }
+            recovered = ecrecover(
+                ethSignHash,
+                signature.v,
+                signature.r,
+                signature.s
+            );
+        }
+        // `recovered` can be null if the signature values are out of range.
+        if (recovered == address(0)) {
+            LibSignatureRichErrors.SignatureValidationError(
+                LibSignatureRichErrors.SignatureValidationErrorCodes.BAD_SIGNATURE_DATA,
+                hash
+            ).rrevert();
+        }
+    }
+
+    /// @dev Validates that a signature is compatible with a hash signee.
+    /// @param hash The hash that was signed.
+    /// @param signature The signature.
+    function _validateHashCompatibleSignature(
+        bytes32 hash,
+        Signature memory signature
+    )
+        private
+        pure
+    {
+        // Ensure the r and s are within malleability limits.
+        if (uint256(signature.r) >= ECDSA_SIGNATURE_R_LIMIT ||
+            uint256(signature.s) >= ECDSA_SIGNATURE_S_LIMIT)
+        {
+            LibSignatureRichErrors.SignatureValidationError(
+                LibSignatureRichErrors.SignatureValidationErrorCodes.BAD_SIGNATURE_DATA,
+                hash
+            ).rrevert();
+        }
+
+        // Always illegal signature.
+        if (signature.signatureType == SignatureType.ILLEGAL) {
+            LibSignatureRichErrors.SignatureValidationError(
+                LibSignatureRichErrors.SignatureValidationErrorCodes.ILLEGAL,
+                hash
+            ).rrevert();
+        }
+
+        // Always invalid.
+        if (signature.signatureType == SignatureType.INVALID) {
+            LibSignatureRichErrors.SignatureValidationError(
+                LibSignatureRichErrors.SignatureValidationErrorCodes.ALWAYS_INVALID,
+                hash
+            ).rrevert();
+        }
+
+        // Solidity should check that the signature type is within enum range for us
+        // when abi-decoding.
+    }
+}

contracts/zero-ex/contracts/src/features/libs/LibTokenSpender.sol

@@ -27,6 +27,9 @@ import "../ITokenSpenderFeature.sol";
 library LibTokenSpender {
     using LibRichErrorsV06 for bytes;
 
+    // Mask of the lower 20 bytes of a bytes32.
+    uint256 constant private ADDRESS_MASK = 0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff;
+
     /// @dev Transfers ERC20 tokens from `owner` to `to`.
     /// @param token The token to spend.
     /// @param owner The owner of the tokens.
@@ -50,11 +53,11 @@ library LibTokenSpender {
 
             // selector for transferFrom(address,address,uint256)
             mstore(ptr, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
-            mstore(add(ptr, 0x04), owner)
+            mstore(add(ptr, 0x04), and(owner, ADDRESS_MASK))
-            mstore(add(ptr, 0x24), to)
+            mstore(add(ptr, 0x24), and(to, ADDRESS_MASK))
             mstore(add(ptr, 0x44), amount)
 
-            success := call(gas(), token, 0, ptr, 0x64, 0, 0)
+            success := call(gas(), and(token, ADDRESS_MASK), 0, ptr, 0x64, 0, 0)
 
             let rdsize := returndatasize()
 

contracts/zero-ex/contracts/src/fixins/FixinProtocolFees.sol

@@ -0,0 +1,114 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+import "../external/FeeCollector.sol";
+import "../features/libs/LibTokenSpender.sol";
+
+/// @dev Helpers for collecting protocol fees.
+abstract contract FixinProtocolFees {
+    bytes32 immutable feeCollectorCodeHash;
+
+    constructor() internal {
+        feeCollectorCodeHash = keccak256(type(FeeCollector).creationCode);
+    }
+
+    /// @dev   Collect the specified protocol fee in either WETH or ETH. If
+    ///        msg.value is non-zero, the fee will be paid in ETH. Otherwise,
+    ///        this function attempts to transfer the fee in WETH. Either way,
+    ///        The fee is stored in a per-pool fee collector contract.
+    /// @param poolId The pool ID for which a fee is being collected.
+    /// @param amount The amount of ETH/WETH to be collected.
+    /// @param weth The WETH token contract.
+    function _collectProtocolFee(
+        bytes32 poolId,
+        uint256 amount,
+        IERC20TokenV06 weth
+    )
+        internal
+    {
+        FeeCollector feeCollector = _getFeeCollector(poolId);
+
+        if (msg.value == 0) {
+            // WETH
+            LibTokenSpender.spendERC20Tokens(weth, msg.sender, address(feeCollector), amount);
+        } else {
+            // ETH
+            (bool success,) = address(feeCollector).call{value: amount}("");
+            require(success, "FixinProtocolFees/ETHER_TRANSFER_FALIED");
+        }
+    }
+
+    /// @dev Transfer fees for a given pool to the staking contract.
+    /// @param poolId Identifies the pool whose fees are being paid.
+    function _transferFeesForPool(
+        bytes32 poolId,
+        IStaking staking,
+        IEtherTokenV06 weth
+    )
+        internal
+    {
+        FeeCollector feeCollector = _getFeeCollector(poolId);
+
+        uint256 codeSize;
+        assembly {
+            codeSize := extcodesize(feeCollector)
+        }
+
+        if (codeSize == 0) {
+            // Create and initialize the contract if necessary.
+            new FeeCollector{salt: poolId}();
+            feeCollector.initialize(weth, staking, poolId);
+        }
+
+        if (address(feeCollector).balance > 1) {
+            feeCollector.convertToWeth(weth);
+        }
+
+        uint256 bal = weth.balanceOf(address(feeCollector));
+        if (bal > 1) {
+            // Leave 1 wei behind to avoid high SSTORE cost of zero-->non-zero.
+            staking.payProtocolFee(
+                address(feeCollector),
+                address(feeCollector),
+                bal - 1);
+        }
+    }
+
+    /// @dev Compute the CREATE2 address for a fee collector.
+    /// @param poolId The fee collector's pool ID.
+    function _getFeeCollector(
+        bytes32 poolId
+    )
+        internal
+        view
+        returns (FeeCollector)
+    {
+        // Compute the CREATE2 address for the fee collector.
+        address payable addr = address(uint256(keccak256(abi.encodePacked(
+            byte(0xff),
+            address(this),
+            poolId, // pool ID is salt
+            feeCollectorCodeHash
+        ))));
+        return FeeCollector(addr);
+    }
+}

contracts/zero-ex/contracts/src/storage/LibLiquidityProviderStorage.sol

@@ -1,45 +0,0 @@
-/*
-
-  Copyright 2020 ZeroEx Intl.
-
-  Licensed under the Apache License, Version 2.0 (the "License");
-  you may not use this file except in compliance with the License.
-  You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-  Unless required by applicable law or agreed to in writing, software
-  distributed under the License is distributed on an "AS IS" BASIS,
-  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  See the License for the specific language governing permissions and
-  limitations under the License.
-
-*/
-
-pragma solidity ^0.6.5;
-pragma experimental ABIEncoderV2;
-
-import "./LibStorage.sol";
-
-
-/// @dev Storage helpers for `LiquidityProviderFeature`.
-library LibLiquidityProviderStorage {
-
-    /// @dev Storage bucket for this feature.
-    struct Storage {
-        // Mapping of taker token -> maker token -> liquidity provider address
-        // Note that addressBook[x][y] == addressBook[y][x] will always hold.
-        mapping (address => mapping (address => address)) addressBook;
-    }
-
-    /// @dev Get the storage bucket for this contract.
-    function getStorage() internal pure returns (Storage storage stor) {
-        uint256 storageSlot = LibStorage.getStorageSlot(
-            LibStorage.StorageId.LiquidityProvider
-        );
-        // Dip into assembly to change the slot pointed to by the local
-        // variable `stor`.
-        // See https://solidity.readthedocs.io/en/v0.6.8/assembly.html?highlight=slot#access-to-external-variables-functions-and-libraries
-        assembly { stor_slot := storageSlot }
-    }
-}

contracts/zero-ex/contracts/src/storage/LibStorage.sol

@@ -36,8 +36,7 @@ library LibStorage {
         TokenSpender,
         TransformERC20,
         MetaTransactions,
-        ReentrancyGuard,
+        ReentrancyGuard
-        LiquidityProvider
     }
 
     /// @dev Get the storage slot given a storage ID. We assign unique, well-spaced

contracts/zero-ex/contracts/src/transformers/FillQuoteTransformer.sol

@@ -27,6 +27,7 @@ import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
 import "@0x/contracts-utils/contracts/src/v06/LibMathV06.sol";
 import "../errors/LibTransformERC20RichErrors.sol";
 import "../vendor/v3/IExchange.sol";
+import "../vendor/v3/LibOrderHash.sol";
 import "./bridges/IBridgeAdapter.sol";
 import "./Transformer.sol";
 import "./LibERC20Transformer.sol";
@@ -104,13 +105,8 @@ contract FillQuoteTransformer is
 
     /// @dev Emitted when a trade is skipped due to a lack of funds
     ///      to pay the 0x Protocol fee.
-    /// @param ethBalance The current eth balance.
+    /// @param orderHash The hash of the order that was skipped.
-    /// @param ethNeeded The current eth balance required to pay
+    event ProtocolFeeUnfunded(bytes32 orderHash);
-    ///        the protocol fee.
-    event ProtocolFeeUnfunded(
-        uint256 ethBalance,
-        uint256 ethNeeded
-    );
 
     /// @dev The Exchange ERC20Proxy ID.
     bytes4 private constant ERC20_ASSET_PROXY_ID = 0xf47261b0;
@@ -450,7 +446,11 @@ contract FillQuoteTransformer is
             }
             // Emit an event if we do not have sufficient ETH to cover the protocol fee.
             if (state.ethRemaining < state.protocolFee) {
-                emit ProtocolFeeUnfunded(state.ethRemaining, state.protocolFee);
+                bytes32 orderHash = LibOrderHash.getTypedDataHash(
+                    order,
+                    exchange.EIP712_EXCHANGE_DOMAIN_HASH()
+                );
+                emit ProtocolFeeUnfunded(orderHash);
                 return results;
             }
             try

contracts/zero-ex/contracts/src/transformers/bridges/BridgeAdapter.sol

@@ -64,22 +64,6 @@ contract BridgeAdapter is
     address private immutable UNISWAP_BRIDGE_ADDRESS;
     address private immutable UNISWAP_V2_BRIDGE_ADDRESS;
 
-    /// @dev Emitted when a trade occurs.
-    /// @param inputToken The token the bridge is converting from.
-    /// @param outputToken The token the bridge is converting to.
-    /// @param inputTokenAmount Amount of input token.
-    /// @param outputTokenAmount Amount of output token.
-    /// @param from The bridge address, indicating the underlying source of the fill.
-    /// @param to The `to` address, currrently `address(this)`
-    event ERC20BridgeTransfer(
-        IERC20TokenV06 inputToken,
-        IERC20TokenV06 outputToken,
-        uint256 inputTokenAmount,
-        uint256 outputTokenAmount,
-        address from,
-        address to
-    );
-
     constructor(AdapterAddresses memory addresses)
         public
         MixinBalancer()
@@ -89,7 +73,7 @@ contract BridgeAdapter is
         MixinMooniswap(addresses)
         MixinMStable(addresses)
         MixinOasis(addresses)
-        MixinShell(addresses)
+        MixinShell()
         MixinSushiswap(addresses)
         MixinUniswap(addresses)
         MixinUniswapV2(addresses)
@@ -209,7 +193,8 @@ contract BridgeAdapter is
                 sellAmount,
                 bridgeData
             );
-            // Do not emit an event. The bridge contract should emit one itself.
+            // Old bridge contracts should emit an `ERC20BridgeTransfer` themselves,
+            // otherwise an event will be emitted from `_tradeZeroExBridge`.
             return boughtAmount;
         }
 

contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinAdapterAddresses.sol

@@ -44,7 +44,6 @@ contract MixinAdapterAddresses
         address uniswapV2Router;
         address uniswapExchangeFactory;
         address mStable;
-        address shell;
         address dodoHelper;
         // Other
         address weth;

contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinShell.sol

@@ -37,22 +37,11 @@ interface IShell {
         returns (uint256 toAmount);
 }
 
-
-
 contract MixinShell is
     MixinAdapterAddresses
 {
     using LibERC20TokenV06 for IERC20TokenV06;
 
-    /// @dev Mainnet address of the `Shell` contract.
-    IShell private immutable SHELL;
-
-    constructor(AdapterAddresses memory addresses)
-        public
-    {
-        SHELL = IShell(addresses.shell);
-    }
-
     function _tradeShell(
         IERC20TokenV06 buyToken,
         uint256 sellAmount,
@@ -61,15 +50,15 @@ contract MixinShell is
         internal
         returns (uint256 boughtAmount)
     {
-        (address fromTokenAddress) = abi.decode(bridgeData, (address));
+        (address fromTokenAddress, address pool) = abi.decode(bridgeData, (address, address));
 
         // Grant the Shell contract an allowance to sell the first token.
         IERC20TokenV06(fromTokenAddress).approveIfBelow(
-            address(SHELL),
+            pool,
             sellAmount
         );
 
-        boughtAmount = SHELL.originSwap(
+        boughtAmount = IShell(pool).originSwap(
             fromTokenAddress,
             address(buyToken),
              // Sell all tokens we hold.

contracts/zero-ex/contracts/src/transformers/bridges/mixins/MixinZeroExBridge.sol

@@ -21,32 +21,31 @@ pragma solidity ^0.6.5;
 import "@0x/contracts-erc20/contracts/src/v06/LibERC20TokenV06.sol";
 import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
 import "@0x/contracts-utils/contracts/src/v06/LibSafeMathV06.sol";
+import "../../../vendor/ILiquidityProvider.sol";
+import "../../../vendor/v3/IERC20Bridge.sol";
 
-interface IERC20Bridge {
-
-    /// @dev Transfers `amount` of the ERC20 `buyToken` from `from` to `to`.
-    /// @param buyToken The address of the ERC20 token to transfer.
-    /// @param from Address to transfer asset from.
-    /// @param to Address to transfer asset to.
-    /// @param amount Amount of asset to transfer.
-    /// @param bridgeData Arbitrary asset data needed by the bridge contract.
-    /// @return success The magic bytes `0xdc1600f3` if successful.
-    function bridgeTransferFrom(
-        IERC20TokenV06 buyToken,
-        address from,
-        address to,
-        uint256 amount,
-        bytes calldata bridgeData
-    )
-        external
-        returns (bytes4 success);
-}
 
 contract MixinZeroExBridge {
 
     using LibERC20TokenV06 for IERC20TokenV06;
     using LibSafeMathV06 for uint256;
 
+    /// @dev Emitted when a trade occurs.
+    /// @param inputToken The token the bridge is converting from.
+    /// @param outputToken The token the bridge is converting to.
+    /// @param inputTokenAmount Amount of input token.
+    /// @param outputTokenAmount Amount of output token.
+    /// @param from The bridge address, indicating the underlying source of the fill.
+    /// @param to The `to` address, currrently `address(this)`
+    event ERC20BridgeTransfer(
+        IERC20TokenV06 inputToken,
+        IERC20TokenV06 outputToken,
+        uint256 inputTokenAmount,
+        uint256 outputTokenAmount,
+        address from,
+        address to
+    );
+
     function _tradeZeroExBridge(
         address bridgeAddress,
         IERC20TokenV06 sellToken,
@@ -57,19 +56,37 @@ contract MixinZeroExBridge {
         internal
         returns (uint256 boughtAmount)
     {
-        uint256 balanceBefore = buyToken.balanceOf(address(this));
         // Trade the good old fashioned way
         sellToken.compatTransfer(
             bridgeAddress,
             sellAmount
         );
-        IERC20Bridge(bridgeAddress).bridgeTransferFrom(
+        try ILiquidityProvider(bridgeAddress).sellTokenForToken(
-            buyToken,
+                address(sellToken),
-            address(bridgeAddress),
+                address(buyToken),
-            address(this),
+                address(this), // recipient
-            1, // amount to transfer back from the bridge
+                1, // minBuyAmount
-            bridgeData
+                bridgeData
-        );
+        ) returns (uint256 _boughtAmount) {
-        boughtAmount = buyToken.balanceOf(address(this)).safeSub(balanceBefore);
+            boughtAmount = _boughtAmount;
+            emit ERC20BridgeTransfer(
+                sellToken,
+                buyToken,
+                sellAmount,
+                boughtAmount,
+                bridgeAddress,
+                address(this)
+            );
+        } catch {
+            uint256 balanceBefore = buyToken.balanceOf(address(this));
+            IERC20Bridge(bridgeAddress).bridgeTransferFrom(
+                address(buyToken),
+                bridgeAddress,
+                address(this), // recipient
+                1, // minBuyAmount
+                bridgeData
+            );
+            boughtAmount = buyToken.balanceOf(address(this)).safeSub(balanceBefore);
+        }
     }
 }

contracts/zero-ex/contracts/src/vendor/ILiquidityProvider.sol

@@ -0,0 +1,92 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+
+interface ILiquidityProvider {
+
+    /// @dev Trades `inputToken` for `outputToken`. The amount of `inputToken`
+    ///      to sell must be transferred to the contract prior to calling this
+    ///      function to trigger the trade.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
+    function sellTokenForToken(
+        address inputToken,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        returns (uint256 boughtAmount);
+
+    /// @dev Trades ETH for token. ETH must either be attached to this function
+    ///      call or sent to the contract prior to calling this function to
+    ///      trigger the trade.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
+    function sellEthForToken(
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        payable
+        returns (uint256 boughtAmount);
+
+    /// @dev Trades token for ETH. The token must be sent to the contract prior
+    ///      to calling this function to trigger the trade.
+    /// @param inputToken The token being sold.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of ETH to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of ETH bought.
+    function sellTokenForEth(
+        address inputToken,
+        address payable recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        returns (uint256 boughtAmount);
+
+    /// @dev Quotes the amount of `outputToken` that would be obtained by
+    ///      selling `sellAmount` of `inputToken`.
+    /// @param inputToken Address of the taker token (what to sell). Use
+    ///        the wETH address if selling ETH.
+    /// @param outputToken Address of the maker token (what to buy). Use
+    ///        the wETH address if buying ETH.
+    /// @param sellAmount Amount of `inputToken` to sell.
+    /// @return outputTokenAmount Amount of `outputToken` that would be obtained.
+    function getSellQuote(
+        address inputToken,
+        address outputToken,
+        uint256 sellAmount
+    )
+        external
+        view
+        returns (uint256 outputTokenAmount);
+}

contracts/zero-ex/contracts/src/vendor/v3/IExchange.sol

@@ -104,4 +104,9 @@ interface IExchange {
         external
         view
         returns (address proxyAddress);
+
+    function EIP712_EXCHANGE_DOMAIN_HASH()
+        external
+        view
+        returns (bytes32 domainHash);
 }

contracts/zero-ex/contracts/src/vendor/v3/IStaking.sol

@@ -0,0 +1,24 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+
+interface IStaking {
+    function joinStakingPoolAsMaker(bytes32) external;
+    function payProtocolFee(address, address, uint256) external payable;
+}

contracts/zero-ex/contracts/src/vendor/v3/LibOrderHash.sol

@@ -0,0 +1,167 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+
+import "./IExchange.sol";
+
+
+library LibOrderHash {
+
+    using LibOrderHash for IExchange.Order;
+
+    // Hash for the EIP712 Order Schema:
+    // keccak256(abi.encodePacked(
+    //     "Order(",
+    //     "address makerAddress,",
+    //     "address takerAddress,",
+    //     "address feeRecipientAddress,",
+    //     "address senderAddress,",
+    //     "uint256 makerAssetAmount,",
+    //     "uint256 takerAssetAmount,",
+    //     "uint256 makerFee,",
+    //     "uint256 takerFee,",
+    //     "uint256 expirationTimeSeconds,",
+    //     "uint256 salt,",
+    //     "bytes makerAssetData,",
+    //     "bytes takerAssetData,",
+    //     "bytes makerFeeAssetData,",
+    //     "bytes takerFeeAssetData",
+    //     ")"
+    // ))
+    bytes32 constant internal _EIP712_ORDER_SCHEMA_HASH =
+        0xf80322eb8376aafb64eadf8f0d7623f22130fd9491a221e902b713cb984a7534;
+
+    /// @dev Calculates the EIP712 typed data hash of an order with a given domain separator.
+    /// @param order The order structure.
+    /// @param eip712ExchangeDomainHash Domain hash for the Exchange.
+    /// @return orderHash EIP712 typed data hash of the order.
+    function getTypedDataHash(IExchange.Order memory order, bytes32 eip712ExchangeDomainHash)
+        internal
+        pure
+        returns (bytes32 orderHash)
+    {
+        orderHash = _hashEIP712Message(
+            eip712ExchangeDomainHash,
+            order.getStructHash()
+        );
+        return orderHash;
+    }
+
+    /// @dev Calculates EIP712 hash of the order struct.
+    /// @param order The order structure.
+    /// @return result EIP712 hash of the order struct.
+    function getStructHash(IExchange.Order memory order)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        bytes32 schemaHash = _EIP712_ORDER_SCHEMA_HASH;
+        bytes memory makerAssetData = order.makerAssetData;
+        bytes memory takerAssetData = order.takerAssetData;
+        bytes memory makerFeeAssetData = order.makerFeeAssetData;
+        bytes memory takerFeeAssetData = order.takerFeeAssetData;
+
+        // Assembly for more efficiently computing:
+        // keccak256(abi.encodePacked(
+        //     EIP712_ORDER_SCHEMA_HASH,
+        //     uint256(order.makerAddress),
+        //     uint256(order.takerAddress),
+        //     uint256(order.feeRecipientAddress),
+        //     uint256(order.senderAddress),
+        //     order.makerAssetAmount,
+        //     order.takerAssetAmount,
+        //     order.makerFee,
+        //     order.takerFee,
+        //     order.expirationTimeSeconds,
+        //     order.salt,
+        //     keccak256(order.makerAssetData),
+        //     keccak256(order.takerAssetData),
+        //     keccak256(order.makerFeeAssetData),
+        //     keccak256(order.takerFeeAssetData)
+        // ));
+
+        assembly {
+            // Assert order offset (this is an internal error that should never be triggered)
+            if lt(order, 32) {
+                invalid()
+            }
+
+            // Calculate memory addresses that will be swapped out before hashing
+            let pos1 := sub(order, 32)
+            let pos2 := add(order, 320)
+            let pos3 := add(order, 352)
+            let pos4 := add(order, 384)
+            let pos5 := add(order, 416)
+
+            // Backup
+            let temp1 := mload(pos1)
+            let temp2 := mload(pos2)
+            let temp3 := mload(pos3)
+            let temp4 := mload(pos4)
+            let temp5 := mload(pos5)
+
+            // Hash in place
+            mstore(pos1, schemaHash)
+            mstore(pos2, keccak256(add(makerAssetData, 32), mload(makerAssetData)))        // store hash of makerAssetData
+            mstore(pos3, keccak256(add(takerAssetData, 32), mload(takerAssetData)))        // store hash of takerAssetData
+            mstore(pos4, keccak256(add(makerFeeAssetData, 32), mload(makerFeeAssetData)))  // store hash of makerFeeAssetData
+            mstore(pos5, keccak256(add(takerFeeAssetData, 32), mload(takerFeeAssetData)))  // store hash of takerFeeAssetData
+            result := keccak256(pos1, 480)
+
+            // Restore
+            mstore(pos1, temp1)
+            mstore(pos2, temp2)
+            mstore(pos3, temp3)
+            mstore(pos4, temp4)
+            mstore(pos5, temp5)
+        }
+        return result;
+    }
+
+    /// @dev Calculates EIP712 encoding for a hash struct with a given domain hash.
+    /// @param eip712DomainHash Hash of the domain domain separator data, computed
+    ///                         with getDomainHash().
+    /// @param hashStruct The EIP712 hash struct.
+    /// @return result EIP712 hash applied to the given EIP712 Domain.
+    function _hashEIP712Message(bytes32 eip712DomainHash, bytes32 hashStruct)
+        internal
+        pure
+        returns (bytes32 result)
+    {
+        // Assembly for more efficient computing:
+        // keccak256(abi.encodePacked(
+        //     EIP191_HEADER,
+        //     EIP712_DOMAIN_HASH,
+        //     hashStruct
+        // ));
+
+        assembly {
+            // Load free memory pointer
+            let memPtr := mload(64)
+
+            mstore(memPtr, 0x1901000000000000000000000000000000000000000000000000000000000000)  // EIP191 header
+            mstore(add(memPtr, 2), eip712DomainHash)                                            // EIP712 domain hash
+            mstore(add(memPtr, 34), hashStruct)                                                 // Hash of struct
+
+            // Compute hash
+            result := keccak256(memPtr, 66)
+        }
+        return result;
+    }
+}

contracts/zero-ex/contracts/test/TestBridge.sol

@@ -1,19 +1,15 @@
+
 /*
-
   Copyright 2020 ZeroEx Intl.
-
   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at
-
     http://www.apache.org/licenses/LICENSE-2.0
-
   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
-
 */
 
 pragma solidity ^0.6.5;

contracts/zero-ex/contracts/test/TestFillQuoteTransformerBridge.sol

@@ -32,28 +32,26 @@ contract TestFillQuoteTransformerBridge {
         uint256 amount;
     }
 
-    bytes4 private constant ERC20_BRIDGE_PROXY_ID = 0xdc1600f3;
+    function sellTokenForToken(
-
+        address takerToken,
-    function bridgeTransferFrom(
+        address makerToken,
-        address tokenAddress,
+        address recipient,
-        address from,
+        uint256 minBuyAmount,
-        address to,
+        bytes calldata auxiliaryData
-        uint256 amount,
-        bytes calldata bridgeData
     )
         external
-        returns (bytes4 success)
+        returns (uint256 boughtAmount)
     {
-        FillBehavior memory behavior = abi.decode(bridgeData, (FillBehavior));
+        FillBehavior memory behavior = abi.decode(auxiliaryData, (FillBehavior));
-        TestMintableERC20Token(tokenAddress).mint(
+        boughtAmount = LibMathV06.getPartialAmountFloor(
-          to,
+            behavior.makerAssetMintRatio,
-          LibMathV06.getPartialAmountFloor(
+            1e18,
-              behavior.makerAssetMintRatio,
+            behavior.amount
-              1e18,
+        );
-              behavior.amount
+        TestMintableERC20Token(makerToken).mint(
-          )
+          recipient,
+          boughtAmount
         );
-        return ERC20_BRIDGE_PROXY_ID;
     }
 
     function encodeBehaviorData(FillBehavior calldata behavior)

contracts/zero-ex/contracts/test/TestFillQuoteTransformerExchange.sol

@@ -35,6 +35,8 @@ contract TestFillQuoteTransformerExchange {
         uint256 makerAssetMintRatio;
     }
 
+    bytes32 public constant EIP712_EXCHANGE_DOMAIN_HASH = 0xaa81d881b1adbbf115e15b849cb9cdc643cad3c6a90f30eb505954af943247e6;
+
     uint256 private constant PROTOCOL_FEE_MULTIPLIER = 1337;
 
     using LibSafeMathV06 for uint256;

contracts/zero-ex/contracts/test/TestInitialMigration.sol

@@ -22,6 +22,7 @@ pragma experimental ABIEncoderV2;
 import "../src/ZeroEx.sol";
 import "../src/features/IBootstrapFeature.sol";
 import "../src/migrations/InitialMigration.sol";
+import "../src/features/SimpleFunctionRegistryFeature.sol";
 
 
 contract TestInitialMigration is
@@ -44,7 +45,8 @@ contract TestInitialMigration is
     {
         success = InitialMigration.bootstrap(owner, features);
         // Snoop the bootstrap feature contract.
-        bootstrapFeature = ZeroEx(address(uint160(address(this))))
+        bootstrapFeature =
+            SimpleFunctionRegistryFeature(address(uint160(address(this))))
             .getFunctionImplementation(IBootstrapFeature.bootstrap.selector);
     }
 

contracts/zero-ex/contracts/test/TestLibSignature.sol

@@ -16,21 +16,19 @@
 
 */
 
-pragma solidity ^0.6;
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "../src/features/libs/LibSignature.sol";
 
 
-interface ILiquidityProviderRegistry {
+contract TestLibSignature {
 
-    /// @dev Returns the address of a liquidity provider for the given market
+    function getSignerOfHash(bytes32 hash, LibSignature.Signature calldata signature)
-    ///      (takerToken, makerToken), reverting if the pool does not exist.
-    /// @param takerToken Taker asset managed by liquidity provider.
-    /// @param makerToken Maker asset managed by liquidity provider.
-    /// @return providerAddress Address of the liquidity provider.
-    function getLiquidityProviderForMarket(
-        address takerToken,
-        address makerToken
-    )
         external
-        view
+        pure
-        returns (address providerAddress);
+        returns (address signer)
+    {
+        return LibSignature.getSignerOfHash(hash, signature);
+    }
 }

contracts/zero-ex/contracts/test/TestLiquidityProvider.sol

@@ -0,0 +1,135 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/IERC20TokenV06.sol";
+
+
+contract TestLiquidityProvider {
+    event SellTokenForToken(
+        address inputToken,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        uint256 inputTokenBalance
+    );
+
+    event SellEthForToken(
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        uint256 ethBalance
+    );
+
+    event SellTokenForEth(
+        address inputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        uint256 inputTokenBalance
+    );
+
+    IERC20TokenV06 public immutable xAsset;
+    IERC20TokenV06 public immutable yAsset;
+
+    constructor(IERC20TokenV06 xAsset_, IERC20TokenV06 yAsset_)
+        public
+    {
+        xAsset = xAsset_;
+        yAsset = yAsset_;
+    }
+
+    receive() external payable {}
+
+    /// @dev Trades `inputToken` for `outputToken`. The amount of `inputToken`
+    ///      to sell must be transferred to the contract prior to calling this
+    ///      function to trigger the trade.
+    /// @param inputToken The token being sold.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
+    function sellTokenForToken(
+        address inputToken,
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        returns (uint256 boughtAmount)
+    {
+        emit SellTokenForToken(
+            inputToken,
+            outputToken,
+            recipient,
+            minBuyAmount,
+            IERC20TokenV06(inputToken).balanceOf(address(this))
+        );
+    }
+
+    /// @dev Trades ETH for token. ETH must be sent to the contract prior to
+    ///      calling this function to trigger the trade.
+    /// @param outputToken The token being bought.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of `outputToken` to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of `outputToken` bought.
+    function sellEthForToken(
+        address outputToken,
+        address recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        returns (uint256 boughtAmount)
+    {
+        emit SellEthForToken(
+            outputToken,
+            recipient,
+            minBuyAmount,
+            address(this).balance
+        );
+    }
+
+    /// @dev Trades token for ETH. The token must be sent to the contract prior
+    ///      to calling this function to trigger the trade.
+    /// @param inputToken The token being sold.
+    /// @param recipient The recipient of the bought tokens.
+    /// @param minBuyAmount The minimum acceptable amount of ETH to buy.
+    /// @param auxiliaryData Arbitrary auxiliary data supplied to the contract.
+    /// @return boughtAmount The amount of ETH bought.
+    function sellTokenForEth(
+        address inputToken,
+        address payable recipient,
+        uint256 minBuyAmount,
+        bytes calldata auxiliaryData
+    )
+        external
+        returns (uint256 boughtAmount)
+    {
+        emit SellTokenForEth(
+            inputToken,
+            recipient,
+            minBuyAmount,
+            IERC20TokenV06(inputToken).balanceOf(address(this))
+        );
+    }
+}

contracts/zero-ex/contracts/test/TestProtocolFees.sol

@@ -0,0 +1,55 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "../src/fixins/FixinProtocolFees.sol";
+
+contract TestProtocolFees is FixinProtocolFees {
+    function collectProtocolFee(
+        bytes32 poolId,
+        uint256 amount,
+        IERC20TokenV06 weth
+    )
+        external
+        payable
+    {
+        _collectProtocolFee(poolId, amount, weth);
+    }
+
+    function transferFeesForPool(
+        bytes32 poolId,
+        IStaking staking,
+        IEtherTokenV06 weth
+    )
+        external
+    {
+        _transferFeesForPool(poolId, staking, weth);
+    }
+
+    function getFeeCollector(
+        bytes32 poolId
+    )
+        external
+        view
+        returns (FeeCollector)
+    {
+        return _getFeeCollector(poolId);
+    }
+}

contracts/zero-ex/contracts/test/TestStaking.sol

@@ -0,0 +1,49 @@
+/*
+
+  Copyright 2020 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.6.5;
+pragma experimental ABIEncoderV2;
+
+import "@0x/contracts-erc20/contracts/src/v06/IEtherTokenV06.sol";
+
+contract TestStaking {
+    mapping(address => bytes32) public poolForMaker;
+    mapping(bytes32 => uint256) public balanceForPool;
+
+    IEtherTokenV06 immutable weth;
+
+    constructor(IEtherTokenV06 _weth) public {
+        weth = _weth;
+    }
+
+    function joinStakingPoolAsMaker(bytes32 poolId) external {
+        poolForMaker[msg.sender] = poolId;
+    }
+
+    function payProtocolFee(
+        address makerAddress,
+        address payerAddress,
+        uint256 amount
+    )
+        external
+        payable
+    {
+        require(weth.transferFrom(payerAddress, address(this), amount));
+        balanceForPool[poolForMaker[makerAddress]] += amount;
+    }
+}

contracts/zero-ex/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@0x/contracts-zero-ex",
-    "version": "0.5.1",
+    "version": "0.9.0",
     "engines": {
         "node": ">=6.12"
     },
@@ -10,8 +10,9 @@
         "test": "test"
     },
     "scripts": {
-        "build": "yarn pre_build && tsc -b",
+        "build": "yarn pre_build && yarn build:ts",
         "build:ci": "yarn build",
+        "build:ts": "tsc -b",
         "pre_build": "run-s compile contracts:gen generate_contract_wrappers contracts:copy",
         "test": "yarn run_mocha",
         "rebuild_and_test": "run-s build test",
@@ -39,9 +40,9 @@
         "publish:private": "yarn build && gitpkg publish"
     },
     "config": {
-        "publicInterfaceContracts": "IZeroEx,ZeroEx,FullMigration,InitialMigration,IFlashWallet,IAllowanceTarget,IERC20Transformer,IOwnableFeature,ISimpleFunctionRegistryFeature,ITokenSpenderFeature,ITransformERC20Feature,FillQuoteTransformer,PayTakerTransformer,WethTransformer,OwnableFeature,SimpleFunctionRegistryFeature,TransformERC20Feature,TokenSpenderFeature,AffiliateFeeTransformer,SignatureValidatorFeature,MetaTransactionsFeature,LogMetadataTransformer,BridgeAdapter,LiquidityProviderFeature",
+        "publicInterfaceContracts": "IZeroEx,ZeroEx,FullMigration,InitialMigration,IFlashWallet,IAllowanceTarget,IERC20Transformer,IOwnableFeature,ISimpleFunctionRegistryFeature,ITokenSpenderFeature,ITransformERC20Feature,FillQuoteTransformer,PayTakerTransformer,WethTransformer,OwnableFeature,SimpleFunctionRegistryFeature,TransformERC20Feature,TokenSpenderFeature,AffiliateFeeTransformer,SignatureValidatorFeature,MetaTransactionsFeature,LogMetadataTransformer,BridgeAdapter,LiquidityProviderFeature,ILiquidityProvider",
         "abis:comment": "This list is auto-generated by contracts-gen. Don't edit manually.",
-        "abis": "./test/generated-artifacts/@(AffiliateFeeTransformer|AllowanceTarget|BootstrapFeature|BridgeAdapter|FillQuoteTransformer|FixinCommon|FixinEIP712|FixinReentrancyGuard|FlashWallet|FullMigration|IAllowanceTarget|IBootstrapFeature|IBridgeAdapter|IERC20Bridge|IERC20Transformer|IExchange|IFeature|IFlashWallet|IGasToken|ILiquidityProviderFeature|IMetaTransactionsFeature|IOwnableFeature|ISignatureValidatorFeature|ISimpleFunctionRegistryFeature|ITestSimpleFunctionRegistryFeature|ITokenSpenderFeature|ITransformERC20Feature|IUniswapFeature|IZeroEx|InitialMigration|LibBootstrap|LibCommonRichErrors|LibERC20Transformer|LibLiquidityProviderRichErrors|LibLiquidityProviderStorage|LibMetaTransactionsRichErrors|LibMetaTransactionsStorage|LibMigrate|LibOwnableRichErrors|LibOwnableStorage|LibProxyRichErrors|LibProxyStorage|LibReentrancyGuardStorage|LibSignatureRichErrors|LibSignedCallData|LibSimpleFunctionRegistryRichErrors|LibSimpleFunctionRegistryStorage|LibSpenderRichErrors|LibStorage|LibTokenSpender|LibTokenSpenderStorage|LibTransformERC20RichErrors|LibTransformERC20Storage|LibWalletRichErrors|LiquidityProviderFeature|LogMetadataTransformer|MetaTransactionsFeature|MixinAdapterAddresses|MixinBalancer|MixinCurve|MixinDodo|MixinKyber|MixinMStable|MixinMooniswap|MixinOasis|MixinShell|MixinSushiswap|MixinUniswap|MixinUniswapV2|MixinZeroExBridge|OwnableFeature|PayTakerTransformer|SignatureValidatorFeature|SimpleFunctionRegistryFeature|TestBridge|TestCallTarget|TestDelegateCaller|TestFillQuoteTransformerBridge|TestFillQuoteTransformerExchange|TestFillQuoteTransformerHost|TestFullMigration|TestInitialMigration|TestLibTokenSpender|TestMetaTransactionsTransformERC20Feature|TestMigrator|TestMintTokenERC20Transformer|TestMintableERC20Token|TestSimpleFunctionRegistryFeatureImpl1|TestSimpleFunctionRegistryFeatureImpl2|TestTokenSpender|TestTokenSpenderERC20Token|TestTransformERC20|TestTransformerBase|TestTransformerDeployerTransformer|TestTransformerHost|TestWeth|TestWethTransformerHost|TestZeroExFeature|TokenSpenderFeature|TransformERC20Feature|Transformer|TransformerDeployer|UniswapFeature|WethTransformer|ZeroEx).json"
+        "abis": "./test/generated-artifacts/@(AffiliateFeeTransformer|AllowanceTarget|BootstrapFeature|BridgeAdapter|FeeCollector|FillQuoteTransformer|FixinCommon|FixinEIP712|FixinProtocolFees|FixinReentrancyGuard|FlashWallet|FullMigration|IAllowanceTarget|IBootstrapFeature|IBridgeAdapter|IERC20Bridge|IERC20Transformer|IExchange|IFeature|IFlashWallet|IGasToken|ILiquidityProvider|ILiquidityProviderFeature|ILiquidityProviderSandbox|IMetaTransactionsFeature|IOwnableFeature|ISignatureValidatorFeature|ISimpleFunctionRegistryFeature|IStaking|ITestSimpleFunctionRegistryFeature|ITokenSpenderFeature|ITransformERC20Feature|IUniswapFeature|IZeroEx|InitialMigration|LibBootstrap|LibCommonRichErrors|LibERC20Transformer|LibLiquidityProviderRichErrors|LibMetaTransactionsRichErrors|LibMetaTransactionsStorage|LibMigrate|LibOrderHash|LibOwnableRichErrors|LibOwnableStorage|LibProxyRichErrors|LibProxyStorage|LibReentrancyGuardStorage|LibSignature|LibSignatureRichErrors|LibSignedCallData|LibSimpleFunctionRegistryRichErrors|LibSimpleFunctionRegistryStorage|LibSpenderRichErrors|LibStorage|LibTokenSpender|LibTokenSpenderStorage|LibTransformERC20RichErrors|LibTransformERC20Storage|LibWalletRichErrors|LiquidityProviderFeature|LiquidityProviderSandbox|LogMetadataTransformer|MetaTransactionsFeature|MixinAdapterAddresses|MixinBalancer|MixinCurve|MixinDodo|MixinKyber|MixinMStable|MixinMooniswap|MixinOasis|MixinShell|MixinSushiswap|MixinUniswap|MixinUniswapV2|MixinZeroExBridge|OwnableFeature|PayTakerTransformer|SignatureValidatorFeature|SimpleFunctionRegistryFeature|TestBridge|TestCallTarget|TestDelegateCaller|TestFillQuoteTransformerBridge|TestFillQuoteTransformerExchange|TestFillQuoteTransformerHost|TestFullMigration|TestInitialMigration|TestLibSignature|TestLibTokenSpender|TestLiquidityProvider|TestMetaTransactionsTransformERC20Feature|TestMigrator|TestMintTokenERC20Transformer|TestMintableERC20Token|TestProtocolFees|TestSimpleFunctionRegistryFeatureImpl1|TestSimpleFunctionRegistryFeatureImpl2|TestStaking|TestTokenSpender|TestTokenSpenderERC20Token|TestTransformERC20|TestTransformerBase|TestTransformerDeployerTransformer|TestTransformerHost|TestWeth|TestWethTransformerHost|TestZeroExFeature|TokenSpenderFeature|TransformERC20Feature|Transformer|TransformerDeployer|UniswapFeature|WethTransformer|ZeroEx).json"
     },
     "repository": {
         "type": "git",
@@ -53,13 +54,12 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/zero-ex",
     "devDependencies": {
-        "@0x/abi-gen": "^5.4.3",
+        "@0x/abi-gen": "^5.4.7",
-        "@0x/contracts-erc20": "^3.2.4",
+        "@0x/contracts-erc20": "^3.2.8",
-        "@0x/contracts-gen": "2.0.13",
+        "@0x/contracts-gen": "2.0.18",
-        "@0x/contracts-test-utils": "^5.3.7",
+        "@0x/contracts-test-utils": "^5.3.11",
-        "@0x/dev-utils": "^3.3.4",
+        "@0x/dev-utils": "^4.0.1",
-        "@0x/order-utils": "^10.4.2",
+        "@0x/sol-compiler": "^4.2.7",
-        "@0x/sol-compiler": "^4.2.3",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.3",
         "@types/lodash": "4.14.104",
@@ -75,12 +75,13 @@
         "typescript": "3.0.1"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.2.7",
+        "@0x/base-contract": "^6.2.11",
-        "@0x/subproviders": "^6.1.5",
+        "@0x/order-utils": "^10.4.6",
-        "@0x/types": "^3.2.4",
+        "@0x/subproviders": "^6.1.9",
+        "@0x/types": "^3.3.0",
         "@0x/typescript-typings": "^5.1.5",
-        "@0x/utils": "^5.6.3",
+        "@0x/utils": "^6.1.0",
-        "@0x/web3-wrapper": "^7.2.4",
+        "@0x/web3-wrapper": "^7.2.8",
         "ethereum-types": "^3.3.3",
         "ethereumjs-util": "^5.1.1"
     },

contracts/zero-ex/src/artifacts.ts

@@ -12,6 +12,7 @@ import * as FullMigration from '../generated-artifacts/FullMigration.json';
 import * as IAllowanceTarget from '../generated-artifacts/IAllowanceTarget.json';
 import * as IERC20Transformer from '../generated-artifacts/IERC20Transformer.json';
 import * as IFlashWallet from '../generated-artifacts/IFlashWallet.json';
+import * as ILiquidityProvider from '../generated-artifacts/ILiquidityProvider.json';
 import * as InitialMigration from '../generated-artifacts/InitialMigration.json';
 import * as IOwnableFeature from '../generated-artifacts/IOwnableFeature.json';
 import * as ISimpleFunctionRegistryFeature from '../generated-artifacts/ISimpleFunctionRegistryFeature.json';
@@ -54,4 +55,5 @@ export const artifacts = {
     LogMetadataTransformer: LogMetadataTransformer as ContractArtifact,
     BridgeAdapter: BridgeAdapter as ContractArtifact,
     LiquidityProviderFeature: LiquidityProviderFeature as ContractArtifact,
+    ILiquidityProvider: ILiquidityProvider as ContractArtifact,
 };

contracts/zero-ex/src/index.ts

@@ -32,6 +32,7 @@ export { artifacts } from './artifacts';
 export * from './migration';
 export * from './nonce_utils';
 export * from './signed_call_data';
+export * from './signature_utils';
 export {
     AffiliateFeeTransformerContract,
     BridgeAdapterContract,
@@ -48,3 +49,6 @@ export {
     WethTransformerContract,
     ZeroExContract,
 } from './wrappers';
+export * from './revert_errors';
+export { EIP712TypedData } from '@0x/types';
+export { SupportedProvider } from '@0x/subproviders';

contracts/zero-ex/src/revert_errors.ts

@@ -0,0 +1,30 @@
+// TODO(dorothy-zbornak): Move these into `@0x/protocol-utils` whenever that
+// becomes a thing.
+// tslint:disable:max-classes-per-file
+import { RevertError } from '@0x/utils';
+
+export enum SignatureValidationErrorCodes {
+    AlwaysInvalid = 0,
+    InvalidLength = 1,
+    Unsupported = 2,
+    Illegal = 3,
+    WrongSigner = 4,
+    BadSignatureData = 5,
+}
+
+// tslint:disable:max-classes-per-file
+export class SignatureValidationError extends RevertError {
+    constructor(code?: SignatureValidationErrorCodes, hash?: string) {
+        super('SignatureValidationError', 'SignatureValidationError(uint8 code, bytes32 hash)', {
+            code,
+            hash,
+        });
+    }
+}
+
+const types = [SignatureValidationError];
+
+// Register the types we've defined.
+for (const type of types) {
+    RevertError.registerType(type);
+}

contracts/zero-ex/src/signature_utils.ts

@@ -0,0 +1,113 @@
+import { signatureUtils } from '@0x/order-utils';
+import { SupportedProvider } from '@0x/subproviders';
+import { EIP712TypedData } from '@0x/types';
+import { hexUtils, signTypedDataUtils } from '@0x/utils';
+import * as ethjs from 'ethereumjs-util';
+
+/**
+ * Valid signature types on the Exchange Proxy.
+ */
+export enum SignatureType {
+    Illegal = 0,
+    Invalid = 1,
+    EIP712 = 2,
+    EthSign = 3,
+}
+
+/**
+ * Represents a raw EC signature.
+ */
+export interface ECSignature {
+    v: number;
+    r: string;
+    s: string;
+}
+
+/**
+ * A complete signature on the Exchange Proxy.
+ */
+export interface Signature extends ECSignature {
+    signatureType: SignatureType;
+}
+
+/**
+ * Sign a hash with the EthSign signature type on a provider.
+ */
+export async function ethSignHashFromProviderAsync(
+    signer: string,
+    hash: string,
+    provider: SupportedProvider,
+): Promise<Signature> {
+    const signatureBytes = await signatureUtils.ecSignHashAsync(provider, hash, signer);
+    const parsed = parsePackedSignatureBytes(signatureBytes);
+    assertSignatureType(parsed, SignatureType.EthSign);
+    return parsed;
+}
+
+/**
+ * Sign a hash with the EthSign signature type, given a private key.
+ */
+export function ethSignHashWithKey(hash: string, key: string): Signature {
+    const ethHash = hexUtils.toHex(
+        ethjs.sha3(hexUtils.concat(ethjs.toBuffer('\x19Ethereum Signed Message:\n32'), hash)),
+    );
+    return {
+        ...ecSignHashWithKey(ethHash, key),
+        signatureType: SignatureType.EthSign,
+    };
+}
+
+/**
+ * Sign a typed data object with the EIP712 signature type, given a private key.
+ */
+export function eip712SignTypedDataWithKey(typedData: EIP712TypedData, key: string): Signature {
+    const hash = hexUtils.toHex(signTypedDataUtils.generateTypedDataHash(typedData));
+    return {
+        ...ecSignHashWithKey(hash, key),
+        signatureType: SignatureType.EIP712,
+    };
+}
+
+/**
+ * Sign an EIP712 hash with the EIP712 signature type, given a private key.
+ */
+export function eip712SignHashWithKey(hash: string, key: string): Signature {
+    return {
+        ...ecSignHashWithKey(hash, key),
+        signatureType: SignatureType.EIP712,
+    };
+}
+
+/**
+ * Generate the EC signature for a hash given a private key.
+ */
+export function ecSignHashWithKey(hash: string, key: string): ECSignature {
+    const { v, r, s } = ethjs.ecsign(ethjs.toBuffer(hash), ethjs.toBuffer(key));
+    return {
+        v,
+        r: ethjs.bufferToHex(r),
+        s: ethjs.bufferToHex(s),
+    };
+}
+
+function assertSignatureType(signature: Signature, expectedType: SignatureType): void {
+    if (signature.signatureType !== expectedType) {
+        throw new Error(`Expected signature type to be ${expectedType} but received ${signature.signatureType}.`);
+    }
+}
+
+function parsePackedSignatureBytes(signatureBytes: string): Signature {
+    if (hexUtils.size(signatureBytes) !== 66) {
+        throw new Error(`Expected packed signatureBytes to be 66 bytes long: ${signatureBytes}`);
+    }
+    const typeId = parseInt(signatureBytes.slice(-2), 16) as SignatureType;
+    if (!Object.values(SignatureType).includes(typeId)) {
+        throw new Error(`Invalid signatureBytes type ID detected: ${typeId}`);
+    }
+    return {
+        signatureType: typeId,
+        v: parseInt(signatureBytes.slice(2, 4), 16),
+        r: hexUtils.slice(signatureBytes, 1, 33),
+        s: hexUtils.slice(signatureBytes, 33),
+    };
+}

contracts/zero-ex/src/wrappers.ts

@@ -10,6 +10,7 @@ export * from '../generated-wrappers/full_migration';
 export * from '../generated-wrappers/i_allowance_target';
 export * from '../generated-wrappers/i_erc20_transformer';
 export * from '../generated-wrappers/i_flash_wallet';
+export * from '../generated-wrappers/i_liquidity_provider';
 export * from '../generated-wrappers/i_ownable_feature';
 export * from '../generated-wrappers/i_simple_function_registry_feature';
 export * from '../generated-wrappers/i_token_spender_feature';

contracts/zero-ex/test/artifacts.ts

@@ -9,9 +9,11 @@ import * as AffiliateFeeTransformer from '../test/generated-artifacts/AffiliateF
 import * as AllowanceTarget from '../test/generated-artifacts/AllowanceTarget.json';
 import * as BootstrapFeature from '../test/generated-artifacts/BootstrapFeature.json';
 import * as BridgeAdapter from '../test/generated-artifacts/BridgeAdapter.json';
+import * as FeeCollector from '../test/generated-artifacts/FeeCollector.json';
 import * as FillQuoteTransformer from '../test/generated-artifacts/FillQuoteTransformer.json';
 import * as FixinCommon from '../test/generated-artifacts/FixinCommon.json';
 import * as FixinEIP712 from '../test/generated-artifacts/FixinEIP712.json';
+import * as FixinProtocolFees from '../test/generated-artifacts/FixinProtocolFees.json';
 import * as FixinReentrancyGuard from '../test/generated-artifacts/FixinReentrancyGuard.json';
 import * as FlashWallet from '../test/generated-artifacts/FlashWallet.json';
 import * as FullMigration from '../test/generated-artifacts/FullMigration.json';
@@ -24,12 +26,15 @@ import * as IExchange from '../test/generated-artifacts/IExchange.json';
 import * as IFeature from '../test/generated-artifacts/IFeature.json';
 import * as IFlashWallet from '../test/generated-artifacts/IFlashWallet.json';
 import * as IGasToken from '../test/generated-artifacts/IGasToken.json';
+import * as ILiquidityProvider from '../test/generated-artifacts/ILiquidityProvider.json';
 import * as ILiquidityProviderFeature from '../test/generated-artifacts/ILiquidityProviderFeature.json';
+import * as ILiquidityProviderSandbox from '../test/generated-artifacts/ILiquidityProviderSandbox.json';
 import * as IMetaTransactionsFeature from '../test/generated-artifacts/IMetaTransactionsFeature.json';
 import * as InitialMigration from '../test/generated-artifacts/InitialMigration.json';
 import * as IOwnableFeature from '../test/generated-artifacts/IOwnableFeature.json';
 import * as ISignatureValidatorFeature from '../test/generated-artifacts/ISignatureValidatorFeature.json';
 import * as ISimpleFunctionRegistryFeature from '../test/generated-artifacts/ISimpleFunctionRegistryFeature.json';
+import * as IStaking from '../test/generated-artifacts/IStaking.json';
 import * as ITestSimpleFunctionRegistryFeature from '../test/generated-artifacts/ITestSimpleFunctionRegistryFeature.json';
 import * as ITokenSpenderFeature from '../test/generated-artifacts/ITokenSpenderFeature.json';
 import * as ITransformERC20Feature from '../test/generated-artifacts/ITransformERC20Feature.json';
@@ -39,15 +44,16 @@ import * as LibBootstrap from '../test/generated-artifacts/LibBootstrap.json';
 import * as LibCommonRichErrors from '../test/generated-artifacts/LibCommonRichErrors.json';
 import * as LibERC20Transformer from '../test/generated-artifacts/LibERC20Transformer.json';
 import * as LibLiquidityProviderRichErrors from '../test/generated-artifacts/LibLiquidityProviderRichErrors.json';
-import * as LibLiquidityProviderStorage from '../test/generated-artifacts/LibLiquidityProviderStorage.json';
 import * as LibMetaTransactionsRichErrors from '../test/generated-artifacts/LibMetaTransactionsRichErrors.json';
 import * as LibMetaTransactionsStorage from '../test/generated-artifacts/LibMetaTransactionsStorage.json';
 import * as LibMigrate from '../test/generated-artifacts/LibMigrate.json';
+import * as LibOrderHash from '../test/generated-artifacts/LibOrderHash.json';
 import * as LibOwnableRichErrors from '../test/generated-artifacts/LibOwnableRichErrors.json';
 import * as LibOwnableStorage from '../test/generated-artifacts/LibOwnableStorage.json';
 import * as LibProxyRichErrors from '../test/generated-artifacts/LibProxyRichErrors.json';
 import * as LibProxyStorage from '../test/generated-artifacts/LibProxyStorage.json';
 import * as LibReentrancyGuardStorage from '../test/generated-artifacts/LibReentrancyGuardStorage.json';
+import * as LibSignature from '../test/generated-artifacts/LibSignature.json';
 import * as LibSignatureRichErrors from '../test/generated-artifacts/LibSignatureRichErrors.json';
 import * as LibSignedCallData from '../test/generated-artifacts/LibSignedCallData.json';
 import * as LibSimpleFunctionRegistryRichErrors from '../test/generated-artifacts/LibSimpleFunctionRegistryRichErrors.json';
@@ -60,6 +66,7 @@ import * as LibTransformERC20RichErrors from '../test/generated-artifacts/LibTra
 import * as LibTransformERC20Storage from '../test/generated-artifacts/LibTransformERC20Storage.json';
 import * as LibWalletRichErrors from '../test/generated-artifacts/LibWalletRichErrors.json';
 import * as LiquidityProviderFeature from '../test/generated-artifacts/LiquidityProviderFeature.json';
+import * as LiquidityProviderSandbox from '../test/generated-artifacts/LiquidityProviderSandbox.json';
 import * as LogMetadataTransformer from '../test/generated-artifacts/LogMetadataTransformer.json';
 import * as MetaTransactionsFeature from '../test/generated-artifacts/MetaTransactionsFeature.json';
 import * as MixinAdapterAddresses from '../test/generated-artifacts/MixinAdapterAddresses.json';
@@ -87,13 +94,17 @@ import * as TestFillQuoteTransformerExchange from '../test/generated-artifacts/T
 import * as TestFillQuoteTransformerHost from '../test/generated-artifacts/TestFillQuoteTransformerHost.json';
 import * as TestFullMigration from '../test/generated-artifacts/TestFullMigration.json';
 import * as TestInitialMigration from '../test/generated-artifacts/TestInitialMigration.json';
+import * as TestLibSignature from '../test/generated-artifacts/TestLibSignature.json';
 import * as TestLibTokenSpender from '../test/generated-artifacts/TestLibTokenSpender.json';
+import * as TestLiquidityProvider from '../test/generated-artifacts/TestLiquidityProvider.json';
 import * as TestMetaTransactionsTransformERC20Feature from '../test/generated-artifacts/TestMetaTransactionsTransformERC20Feature.json';
 import * as TestMigrator from '../test/generated-artifacts/TestMigrator.json';
 import * as TestMintableERC20Token from '../test/generated-artifacts/TestMintableERC20Token.json';
 import * as TestMintTokenERC20Transformer from '../test/generated-artifacts/TestMintTokenERC20Transformer.json';
+import * as TestProtocolFees from '../test/generated-artifacts/TestProtocolFees.json';
 import * as TestSimpleFunctionRegistryFeatureImpl1 from '../test/generated-artifacts/TestSimpleFunctionRegistryFeatureImpl1.json';
 import * as TestSimpleFunctionRegistryFeatureImpl2 from '../test/generated-artifacts/TestSimpleFunctionRegistryFeatureImpl2.json';
+import * as TestStaking from '../test/generated-artifacts/TestStaking.json';
 import * as TestTokenSpender from '../test/generated-artifacts/TestTokenSpender.json';
 import * as TestTokenSpenderERC20Token from '../test/generated-artifacts/TestTokenSpenderERC20Token.json';
 import * as TestTransformerBase from '../test/generated-artifacts/TestTransformerBase.json';
@@ -124,9 +135,12 @@ export const artifacts = {
     LibTransformERC20RichErrors: LibTransformERC20RichErrors as ContractArtifact,
     LibWalletRichErrors: LibWalletRichErrors as ContractArtifact,
     AllowanceTarget: AllowanceTarget as ContractArtifact,
+    FeeCollector: FeeCollector as ContractArtifact,
     FlashWallet: FlashWallet as ContractArtifact,
     IAllowanceTarget: IAllowanceTarget as ContractArtifact,
     IFlashWallet: IFlashWallet as ContractArtifact,
+    ILiquidityProviderSandbox: ILiquidityProviderSandbox as ContractArtifact,
+    LiquidityProviderSandbox: LiquidityProviderSandbox as ContractArtifact,
     TransformerDeployer: TransformerDeployer as ContractArtifact,
     BootstrapFeature: BootstrapFeature as ContractArtifact,
     IBootstrapFeature: IBootstrapFeature as ContractArtifact,
@@ -147,16 +161,17 @@ export const artifacts = {
     TokenSpenderFeature: TokenSpenderFeature as ContractArtifact,
     TransformERC20Feature: TransformERC20Feature as ContractArtifact,
     UniswapFeature: UniswapFeature as ContractArtifact,
+    LibSignature: LibSignature as ContractArtifact,
     LibSignedCallData: LibSignedCallData as ContractArtifact,
     LibTokenSpender: LibTokenSpender as ContractArtifact,
     FixinCommon: FixinCommon as ContractArtifact,
     FixinEIP712: FixinEIP712 as ContractArtifact,
+    FixinProtocolFees: FixinProtocolFees as ContractArtifact,
     FixinReentrancyGuard: FixinReentrancyGuard as ContractArtifact,
     FullMigration: FullMigration as ContractArtifact,
     InitialMigration: InitialMigration as ContractArtifact,
     LibBootstrap: LibBootstrap as ContractArtifact,
     LibMigrate: LibMigrate as ContractArtifact,
-    LibLiquidityProviderStorage: LibLiquidityProviderStorage as ContractArtifact,
     LibMetaTransactionsStorage: LibMetaTransactionsStorage as ContractArtifact,
     LibOwnableStorage: LibOwnableStorage as ContractArtifact,
     LibProxyStorage: LibProxyStorage as ContractArtifact,
@@ -188,9 +203,12 @@ export const artifacts = {
     MixinUniswap: MixinUniswap as ContractArtifact,
     MixinUniswapV2: MixinUniswapV2 as ContractArtifact,
     MixinZeroExBridge: MixinZeroExBridge as ContractArtifact,
+    ILiquidityProvider: ILiquidityProvider as ContractArtifact,
     IERC20Bridge: IERC20Bridge as ContractArtifact,
     IExchange: IExchange as ContractArtifact,
     IGasToken: IGasToken as ContractArtifact,
+    IStaking: IStaking as ContractArtifact,
+    LibOrderHash: LibOrderHash as ContractArtifact,
     ITestSimpleFunctionRegistryFeature: ITestSimpleFunctionRegistryFeature as ContractArtifact,
     TestBridge: TestBridge as ContractArtifact,
     TestCallTarget: TestCallTarget as ContractArtifact,
@@ -200,13 +218,17 @@ export const artifacts = {
     TestFillQuoteTransformerHost: TestFillQuoteTransformerHost as ContractArtifact,
     TestFullMigration: TestFullMigration as ContractArtifact,
     TestInitialMigration: TestInitialMigration as ContractArtifact,
+    TestLibSignature: TestLibSignature as ContractArtifact,
     TestLibTokenSpender: TestLibTokenSpender as ContractArtifact,
+    TestLiquidityProvider: TestLiquidityProvider as ContractArtifact,
     TestMetaTransactionsTransformERC20Feature: TestMetaTransactionsTransformERC20Feature as ContractArtifact,
     TestMigrator: TestMigrator as ContractArtifact,
     TestMintTokenERC20Transformer: TestMintTokenERC20Transformer as ContractArtifact,
     TestMintableERC20Token: TestMintableERC20Token as ContractArtifact,
+    TestProtocolFees: TestProtocolFees as ContractArtifact,
     TestSimpleFunctionRegistryFeatureImpl1: TestSimpleFunctionRegistryFeatureImpl1 as ContractArtifact,
     TestSimpleFunctionRegistryFeatureImpl2: TestSimpleFunctionRegistryFeatureImpl2 as ContractArtifact,
+    TestStaking: TestStaking as ContractArtifact,
     TestTokenSpender: TestTokenSpender as ContractArtifact,
     TestTokenSpenderERC20Token: TestTokenSpenderERC20Token as ContractArtifact,
     TestTransformERC20: TestTransformERC20 as ContractArtifact,

contracts/zero-ex/test/features/liquidity_provider_test.ts

@@ -1,16 +1,25 @@
 import { artifacts as erc20Artifacts, DummyERC20TokenContract } from '@0x/contracts-erc20';
-import { blockchainTests, constants, expect, randomAddress, verifyEventsFromLogs } from '@0x/contracts-test-utils';
+import { blockchainTests, constants, expect, verifyEventsFromLogs } from '@0x/contracts-test-utils';
 import { BigNumber, OwnableRevertErrors, ZeroExRevertErrors } from '@0x/utils';
 
 import { IOwnableFeatureContract, IZeroExContract, LiquidityProviderFeatureContract } from '../../src/wrappers';
 import { artifacts } from '../artifacts';
 import { abis } from '../utils/abis';
 import { fullMigrateAsync } from '../utils/migration';
-import { IERC20BridgeEvents, TestBridgeContract, TestWethContract } from '../wrappers';
+import {
+    LiquidityProviderSandboxContract,
+    TestBridgeContract,
+    TestBridgeEvents,
+    TestLiquidityProviderContract,
+    TestLiquidityProviderEvents,
+    TestWethContract,
+} from '../wrappers';
 
 blockchainTests('LiquidityProvider feature', env => {
     let zeroEx: IZeroExContract;
     let feature: LiquidityProviderFeatureContract;
+    let sandbox: LiquidityProviderSandboxContract;
+    let liquidityProvider: TestLiquidityProviderContract;
     let token: DummyERC20TokenContract;
     let weth: TestWethContract;
     let owner: string;
@@ -47,102 +56,112 @@ blockchainTests('LiquidityProvider feature', env => {
             env.provider,
             env.txDefaults,
             artifacts,
-            weth.address,
+            zeroEx.address,
+        );
+        sandbox = new LiquidityProviderSandboxContract(
+            await featureImpl.sandbox().callAsync(),
+            env.provider,
+            env.txDefaults,
         );
         await new IOwnableFeatureContract(zeroEx.address, env.provider, env.txDefaults, abis)
             .migrate(featureImpl.address, featureImpl.migrate().getABIEncodedTransactionData(), owner)
             .awaitTransactionSuccessAsync();
+
+        liquidityProvider = await TestLiquidityProviderContract.deployFrom0xArtifactAsync(
+            artifacts.TestLiquidityProvider,
+            env.provider,
+            env.txDefaults,
+            artifacts,
+            token.address,
+            weth.address,
+        );
     });
-    describe('Registry', () => {
+    blockchainTests.resets('Sandbox', () => {
-        it('`getLiquidityProviderForMarket` reverts if address is not set', async () => {
+        it('Cannot call sandbox `executeSellTokenForToken` function directly', async () => {
-            const [xAsset, yAsset] = [randomAddress(), randomAddress()];
+            const tx = sandbox
-            let tx = feature.getLiquidityProviderForMarket(xAsset, yAsset).awaitTransactionSuccessAsync();
+                .executeSellTokenForToken(
-            expect(tx).to.revertWith(
+                    liquidityProvider.address,
-                new ZeroExRevertErrors.LiquidityProvider.NoLiquidityProviderForMarketError(xAsset, yAsset),
+                    token.address,
-            );
+                    weth.address,
-            tx = feature.getLiquidityProviderForMarket(yAsset, xAsset).awaitTransactionSuccessAsync();
+                    taker,
-            return expect(tx).to.revertWith(
+                    constants.ZERO_AMOUNT,
-                new ZeroExRevertErrors.LiquidityProvider.NoLiquidityProviderForMarketError(yAsset, xAsset),
+                    constants.NULL_BYTES,
-            );
+                )
-        });
-        it('can set/get a liquidity provider address for a given market', async () => {
-            const expectedAddress = randomAddress();
-            await feature
-                .setLiquidityProviderForMarket(token.address, weth.address, expectedAddress)
-                .awaitTransactionSuccessAsync();
-            let actualAddress = await feature.getLiquidityProviderForMarket(token.address, weth.address).callAsync();
-            expect(actualAddress).to.equal(expectedAddress);
-            actualAddress = await feature.getLiquidityProviderForMarket(weth.address, token.address).callAsync();
-            expect(actualAddress).to.equal(expectedAddress);
-        });
-        it('can update a liquidity provider address for a given market', async () => {
-            const expectedAddress = randomAddress();
-            await feature
-                .setLiquidityProviderForMarket(token.address, weth.address, expectedAddress)
-                .awaitTransactionSuccessAsync();
-            let actualAddress = await feature.getLiquidityProviderForMarket(token.address, weth.address).callAsync();
-            expect(actualAddress).to.equal(expectedAddress);
-            actualAddress = await feature.getLiquidityProviderForMarket(weth.address, token.address).callAsync();
-            expect(actualAddress).to.equal(expectedAddress);
-        });
-        it('can effectively remove a liquidity provider for a market by setting the address to 0', async () => {
-            await feature
-                .setLiquidityProviderForMarket(token.address, weth.address, constants.NULL_ADDRESS)
-                .awaitTransactionSuccessAsync();
-            const tx = feature
-                .getLiquidityProviderForMarket(token.address, weth.address)
-                .awaitTransactionSuccessAsync();
-            return expect(tx).to.revertWith(
-                new ZeroExRevertErrors.LiquidityProvider.NoLiquidityProviderForMarketError(token.address, weth.address),
-            );
-        });
-        it('reverts if non-owner attempts to set an address', async () => {
-            const tx = feature
-                .setLiquidityProviderForMarket(randomAddress(), randomAddress(), randomAddress())
                 .awaitTransactionSuccessAsync({ from: taker });
-            return expect(tx).to.revertWith(new OwnableRevertErrors.OnlyOwnerError(taker, owner));
+            return expect(tx).to.revertWith(new OwnableRevertErrors.OnlyOwnerError(taker));
+        });
+        it('Cannot call sandbox `executeSellEthForToken` function directly', async () => {
+            const tx = sandbox
+                .executeSellEthForToken(
+                    liquidityProvider.address,
+                    token.address,
+                    taker,
+                    constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
+                )
+                .awaitTransactionSuccessAsync({ from: taker });
+            return expect(tx).to.revertWith(new OwnableRevertErrors.OnlyOwnerError(taker));
+        });
+        it('Cannot call sandbox `executeSellTokenForEth` function directly', async () => {
+            const tx = sandbox
+                .executeSellTokenForEth(
+                    liquidityProvider.address,
+                    token.address,
+                    taker,
+                    constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
+                )
+                .awaitTransactionSuccessAsync({ from: taker });
+            return expect(tx).to.revertWith(new OwnableRevertErrors.OnlyOwnerError(taker));
         });
     });
     blockchainTests.resets('Swap', () => {
-        let liquidityProvider: TestBridgeContract;
         const ETH_TOKEN_ADDRESS = '0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE';
 
-        before(async () => {
+        it('Successfully executes an ERC20-ERC20 swap', async () => {
-            liquidityProvider = await TestBridgeContract.deployFrom0xArtifactAsync(
+            const tx = await feature
+                .sellToLiquidityProvider(
+                    token.address,
+                    weth.address,
+                    liquidityProvider.address,
+                    constants.NULL_ADDRESS,
+                    constants.ONE_ETHER,
+                    constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
+                )
+                .awaitTransactionSuccessAsync({ from: taker });
+            verifyEventsFromLogs(
+                tx.logs,
+                [
+                    {
+                        inputToken: token.address,
+                        outputToken: weth.address,
+                        recipient: taker,
+                        minBuyAmount: constants.ZERO_AMOUNT,
+                        inputTokenBalance: constants.ONE_ETHER,
+                    },
+                ],
+                TestLiquidityProviderEvents.SellTokenForToken,
+            );
+        });
+        it('Successfully executes an ERC20-ERC20 swap (backwards-compatibility)', async () => {
+            const bridge = await TestBridgeContract.deployFrom0xArtifactAsync(
                 artifacts.TestBridge,
                 env.provider,
                 env.txDefaults,
                 artifacts,
-                token.address,
                 weth.address,
+                token.address,
             );
-            await feature
-                .setLiquidityProviderForMarket(token.address, weth.address, liquidityProvider.address)
-                .awaitTransactionSuccessAsync();
-        });
-        it('Cannot execute a swap for a market without a liquidity provider set', async () => {
-            const [xAsset, yAsset] = [randomAddress(), randomAddress()];
-            const tx = feature
-                .sellToLiquidityProvider(
-                    xAsset,
-                    yAsset,
-                    constants.NULL_ADDRESS,
-                    constants.ONE_ETHER,
-                    constants.ZERO_AMOUNT,
-                )
-                .awaitTransactionSuccessAsync({ from: taker });
-            return expect(tx).to.revertWith(
-                new ZeroExRevertErrors.LiquidityProvider.NoLiquidityProviderForMarketError(xAsset, yAsset),
-            );
-        });
-        it('Successfully executes an ERC20-ERC20 swap', async () => {
             const tx = await feature
                 .sellToLiquidityProvider(
-                    weth.address,
                     token.address,
+                    weth.address,
+                    bridge.address,
                     constants.NULL_ADDRESS,
                     constants.ONE_ETHER,
                     constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
                 )
                 .awaitTransactionSuccessAsync({ from: taker });
             verifyEventsFromLogs(
@@ -153,22 +172,24 @@ blockchainTests('LiquidityProvider feature', env => {
                         outputToken: weth.address,
                         inputTokenAmount: constants.ONE_ETHER,
                         outputTokenAmount: constants.ZERO_AMOUNT,
-                        from: constants.NULL_ADDRESS,
+                        from: bridge.address,
                         to: taker,
                     },
                 ],
-                IERC20BridgeEvents.ERC20BridgeTransfer,
+                TestBridgeEvents.ERC20BridgeTransfer,
             );
         });
         it('Reverts if cannot fulfill the minimum buy amount', async () => {
             const minBuyAmount = new BigNumber(1);
             const tx = feature
                 .sellToLiquidityProvider(
-                    weth.address,
                     token.address,
+                    weth.address,
+                    liquidityProvider.address,
                     constants.NULL_ADDRESS,
                     constants.ONE_ETHER,
                     minBuyAmount,
+                    constants.NULL_BYTES,
                 )
                 .awaitTransactionSuccessAsync({ from: taker });
             return expect(tx).to.revertWith(
@@ -185,36 +206,38 @@ blockchainTests('LiquidityProvider feature', env => {
         it('Successfully executes an ETH-ERC20 swap', async () => {
             const tx = await feature
                 .sellToLiquidityProvider(
-                    token.address,
                     ETH_TOKEN_ADDRESS,
+                    token.address,
+                    liquidityProvider.address,
                     constants.NULL_ADDRESS,
                     constants.ONE_ETHER,
                     constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
                 )
                 .awaitTransactionSuccessAsync({ from: taker, value: constants.ONE_ETHER });
             verifyEventsFromLogs(
                 tx.logs,
                 [
                     {
-                        inputToken: weth.address,
                         outputToken: token.address,
-                        inputTokenAmount: constants.ONE_ETHER,
+                        recipient: taker,
-                        outputTokenAmount: constants.ZERO_AMOUNT,
+                        minBuyAmount: constants.ZERO_AMOUNT,
-                        from: constants.NULL_ADDRESS,
+                        ethBalance: constants.ONE_ETHER,
-                        to: taker,
                     },
                 ],
-                IERC20BridgeEvents.ERC20BridgeTransfer,
+                TestLiquidityProviderEvents.SellEthForToken,
             );
         });
         it('Successfully executes an ERC20-ETH swap', async () => {
             const tx = await feature
                 .sellToLiquidityProvider(
-                    ETH_TOKEN_ADDRESS,
                     token.address,
+                    ETH_TOKEN_ADDRESS,
+                    liquidityProvider.address,
                     constants.NULL_ADDRESS,
                     constants.ONE_ETHER,
                     constants.ZERO_AMOUNT,
+                    constants.NULL_BYTES,
                 )
                 .awaitTransactionSuccessAsync({ from: taker });
             verifyEventsFromLogs(
@@ -222,14 +245,12 @@ blockchainTests('LiquidityProvider feature', env => {
                 [
                     {
                         inputToken: token.address,
-                        outputToken: weth.address,
+                        recipient: taker,
-                        inputTokenAmount: constants.ONE_ETHER,
+                        minBuyAmount: constants.ZERO_AMOUNT,
-                        outputTokenAmount: constants.ZERO_AMOUNT,
+                        inputTokenBalance: constants.ONE_ETHER,
-                        from: constants.NULL_ADDRESS,
-                        to: zeroEx.address,
                     },
                 ],
-                IERC20BridgeEvents.ERC20BridgeTransfer,
+                TestLiquidityProviderEvents.SellTokenForEth,
             );
         });
     });

contracts/zero-ex/test/features/simple_function_registry_test.ts

@@ -66,7 +66,7 @@ blockchainTests.resets('SimpleFunctionRegistry feature', env => {
 
     it('`rollback()` to zero impl succeeds for unregistered function', async () => {
         await registry.rollback(testFnSelector, NULL_ADDRESS).awaitTransactionSuccessAsync();
-        const impl = await zeroEx.getFunctionImplementation(testFnSelector).callAsync();
+        const impl = await registry.getFunctionImplementation(testFnSelector).callAsync();
         expect(impl).to.eq(NULL_ADDRESS);
     });
 

contracts/zero-ex/test/full_migration_test.ts

@@ -12,6 +12,7 @@ import {
     IMetaTransactionsFeatureContract,
     IOwnableFeatureContract,
     ISignatureValidatorFeatureContract,
+    ISimpleFunctionRegistryFeatureContract,
     ITokenSpenderFeatureContract,
     ITransformERC20FeatureContract,
     TestFullMigrationContract,
@@ -25,6 +26,7 @@ blockchainTests.resets('Full migration', env => {
     let zeroEx: ZeroExContract;
     let features: FullFeatures;
     let migrator: TestFullMigrationContract;
+    let registry: ISimpleFunctionRegistryFeatureContract;
     const transformerDeployer = randomAddress();
 
     before(async () => {
@@ -47,6 +49,7 @@ blockchainTests.resets('Full migration', env => {
         await migrator
             .initializeZeroEx(owner, zeroEx.address, features, { transformerDeployer })
             .awaitTransactionSuccessAsync();
+        registry = new ISimpleFunctionRegistryFeatureContract(zeroEx.address, env.provider, env.txDefaults);
     });
 
     it('ZeroEx has the correct owner', async () => {
@@ -157,7 +160,7 @@ blockchainTests.resets('Full migration', env => {
             for (const fn of featureInfo.fns) {
                 it(`${fn} is registered`, async () => {
                     const selector = contract.getSelector(fn);
-                    const impl = await zeroEx.getFunctionImplementation(selector).callAsync();
+                    const impl = await registry.getFunctionImplementation(selector).callAsync();
                     expect(impl).to.not.eq(NULL_ADDRESS);
                 });
 

contracts/zero-ex/test/lib_signature_test.ts

@@ -0,0 +1,98 @@
+import { blockchainTests, expect } from '@0x/contracts-test-utils';
+import { hexUtils } from '@0x/utils';
+import * as ethjs from 'ethereumjs-util';
+
+import { SignatureValidationError, SignatureValidationErrorCodes } from '../src/revert_errors';
+import { eip712SignHashWithKey, ethSignHashWithKey, SignatureType } from '../src/signature_utils';
+
+import { artifacts } from './artifacts';
+import { TestLibSignatureContract } from './wrappers';
+
+const EMPTY_REVERT = 'reverted with no data';
+
+blockchainTests.resets('LibSignature library', env => {
+    let testLib: TestLibSignatureContract;
+    let signerKey: string;
+    let signer: string;
+
+    before(async () => {
+        signerKey = hexUtils.random();
+        signer = ethjs.bufferToHex(ethjs.privateToAddress(ethjs.toBuffer(signerKey)));
+        testLib = await TestLibSignatureContract.deployFrom0xArtifactAsync(
+            artifacts.TestLibSignature,
+            env.provider,
+            env.txDefaults,
+            artifacts,
+        );
+    });
+
+    describe('getSignerOfHash()', () => {
+        it('can recover the signer of an EIP712 signature', async () => {
+            const hash = hexUtils.random();
+            const sig = eip712SignHashWithKey(hash, signerKey);
+            const recovered = await testLib.getSignerOfHash(hash, sig).callAsync();
+            expect(recovered).to.eq(signer);
+        });
+
+        it('can recover the signer of an EthSign signature', async () => {
+            const hash = hexUtils.random();
+            const sig = ethSignHashWithKey(hash, signerKey);
+            const recovered = await testLib.getSignerOfHash(hash, sig).callAsync();
+            expect(recovered).to.eq(signer);
+        });
+
+        it('throws if the signature type is out of range', async () => {
+            const hash = hexUtils.random();
+            const badType = (Object.values(SignatureType).slice(-1)[0] as number) + 1;
+            const sig = {
+                ...ethSignHashWithKey(hash, signerKey),
+                signatureType: badType,
+            };
+            return expect(testLib.getSignerOfHash(hash, sig).callAsync()).to.be.rejectedWith(EMPTY_REVERT);
+        });
+
+        it('throws if the signature data is malformed', async () => {
+            const hash = hexUtils.random();
+            const sig = {
+                ...ethSignHashWithKey(hash, signerKey),
+                v: 1,
+            };
+            return expect(testLib.getSignerOfHash(hash, sig).callAsync()).to.revertWith(
+                new SignatureValidationError(SignatureValidationErrorCodes.BadSignatureData, hash),
+            );
+        });
+
+        it('throws if an EC value is out of range', async () => {
+            const hash = hexUtils.random();
+            const sig = {
+                ...ethSignHashWithKey(hash, signerKey),
+                r: '0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141',
+            };
+            return expect(testLib.getSignerOfHash(hash, sig).callAsync()).to.revertWith(
+                new SignatureValidationError(SignatureValidationErrorCodes.BadSignatureData, hash),
+            );
+        });
+
+        it('throws if the type is Illegal', async () => {
+            const hash = hexUtils.random();
+            const sig = {
+                ...ethSignHashWithKey(hash, signerKey),
+                signatureType: SignatureType.Illegal,
+            };
+            return expect(testLib.getSignerOfHash(hash, sig).callAsync()).to.revertWith(
+                new SignatureValidationError(SignatureValidationErrorCodes.Illegal, hash),
+            );
+        });
+
+        it('throws if the type is Invalid', async () => {
+            const hash = hexUtils.random();
+            const sig = {
+                ...ethSignHashWithKey(hash, signerKey),
+                signatureType: SignatureType.Invalid,
+            };
+            return expect(testLib.getSignerOfHash(hash, sig).callAsync()).to.revertWith(
+                new SignatureValidationError(SignatureValidationErrorCodes.AlwaysInvalid, hash),
+            );
+        });
+    });
+});

contracts/zero-ex/test/protocol_fees_test.ts

@@ -0,0 +1,164 @@
+import { blockchainTests, constants, expect } from '@0x/contracts-test-utils';
+import { AuthorizableRevertErrors, BigNumber, hexUtils, ZeroExRevertErrors } from '@0x/utils';
+import { TransactionReceiptWithDecodedLogs } from 'ethereum-types';
+
+import { artifacts } from './artifacts';
+import { FeeCollectorContract, TestProtocolFeesContract, TestStakingContract, TestWethContract } from './wrappers';
+
+blockchainTests.resets('ProtocolFees', env => {
+    let payer: string;
+    let unauthorized: string;
+    let protocolFees: TestProtocolFeesContract;
+    let staking: TestStakingContract;
+    let weth: TestWethContract;
+
+    before(async () => {
+        [payer, unauthorized] = await env.getAccountAddressesAsync();
+        protocolFees = await TestProtocolFeesContract.deployFrom0xArtifactAsync(
+            artifacts.TestProtocolFees,
+            env.provider,
+            env.txDefaults,
+            artifacts,
+        );
+        weth = await TestWethContract.deployFrom0xArtifactAsync(
+            artifacts.TestWeth,
+            env.provider,
+            env.txDefaults,
+            artifacts,
+        );
+        staking = await TestStakingContract.deployFrom0xArtifactAsync(
+            artifacts.TestStaking,
+            env.provider,
+            env.txDefaults,
+            artifacts,
+            weth.address,
+        );
+        await weth.mint(payer, constants.ONE_ETHER).awaitTransactionSuccessAsync();
+        await weth.approve(protocolFees.address, constants.ONE_ETHER).awaitTransactionSuccessAsync({ from: payer });
+    });
+
+    async function collectAsync(
+        poolId: string,
+        amount: BigNumber,
+        etherValue: BigNumber,
+    ): Promise<TransactionReceiptWithDecodedLogs> {
+        return protocolFees
+            .collectProtocolFee(poolId, amount, weth.address)
+            .awaitTransactionSuccessAsync({ from: payer, value: etherValue });
+    }
+
+    async function transferFeesAsync(poolId: string): Promise<TransactionReceiptWithDecodedLogs> {
+        return protocolFees.transferFeesForPool(poolId, staking.address, weth.address).awaitTransactionSuccessAsync();
+    }
+
+    describe('FeeCollector', () => {
+        it('should disallow unauthorized initialization', async () => {
+            const pool = hexUtils.random();
+
+            await collectAsync(pool, constants.ONE_ETHER, constants.ZERO_AMOUNT);
+            await transferFeesAsync(pool);
+
+            const feeCollector = new FeeCollectorContract(
+                await protocolFees.getFeeCollector(pool).callAsync(),
+                env.provider,
+                env.txDefaults,
+            );
+
+            const tx = feeCollector
+                .initialize(weth.address, staking.address, pool)
+                .sendTransactionAsync({ from: unauthorized });
+            return expect(tx).to.revertWith(new AuthorizableRevertErrors.SenderNotAuthorizedError(unauthorized));
+        });
+    });
+
+    describe('_collectProtocolFee()', () => {
+        const pool1 = hexUtils.random();
+        const pool2 = hexUtils.random();
+
+        it('should revert if WETH transfer fails', async () => {
+            const tooMuch = constants.ONE_ETHER.plus(1);
+            const tx = collectAsync(pool1, constants.ONE_ETHER.plus(1), constants.ZERO_AMOUNT);
+            return expect(tx).to.revertWith(
+                new ZeroExRevertErrors.Spender.SpenderERC20TransferFromFailedError(
+                    weth.address,
+                    payer,
+                    undefined,
+                    tooMuch,
+                    undefined,
+                ),
+            );
+        });
+
+        it('should revert if insufficient ETH transferred', async () => {
+            const tooLittle = constants.ONE_ETHER.minus(1);
+            const tx = collectAsync(pool1, constants.ONE_ETHER, tooLittle);
+            return expect(tx).to.revertWith('FixinProtocolFees/ETHER_TRANSFER_FALIED');
+        });
+
+        it('should accept WETH fee', async () => {
+            const beforeWETH = await weth.balanceOf(payer).callAsync();
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ZERO_AMOUNT);
+            const afterWETH = await weth.balanceOf(payer).callAsync();
+
+            return expect(beforeWETH.minus(afterWETH)).to.bignumber.eq(constants.ONE_ETHER);
+        });
+
+        it('should accept ETH fee', async () => {
+            const beforeWETH = await weth.balanceOf(payer).callAsync();
+            const beforeETH = await env.web3Wrapper.getBalanceInWeiAsync(payer);
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ONE_ETHER);
+            const afterWETH = await weth.balanceOf(payer).callAsync();
+            const afterETH = await env.web3Wrapper.getBalanceInWeiAsync(payer);
+
+            // We check for greater than 1 ether spent to allow for spending on gas.
+            await expect(beforeETH.minus(afterETH)).to.bignumber.gt(constants.ONE_ETHER);
+            return expect(beforeWETH).to.bignumber.eq(afterWETH);
+        });
+
+        it('should transfer both ETH and WETH', async () => {
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ZERO_AMOUNT);
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ONE_ETHER);
+            await transferFeesAsync(pool1);
+
+            const balanceWETH = await weth.balanceOf(staking.address).callAsync();
+
+            // We leave 1 wei behind of both ETH and WETH.
+            return expect(balanceWETH).to.bignumber.eq(constants.ONE_ETHER.times(2).minus(2));
+        });
+
+        it('should accept ETH after first transfer', async () => {
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ONE_ETHER);
+            await transferFeesAsync(pool1);
+            await collectAsync(pool1, constants.ONE_ETHER, constants.ONE_ETHER);
+            await transferFeesAsync(pool1);
+
+            const balanceWETH = await weth.balanceOf(staking.address).callAsync();
+
+            // We leave 1 wei behind of both ETH and WETH
+            return expect(balanceWETH).to.bignumber.eq(constants.ONE_ETHER.times(2).minus(2));
+        });
+
+        it('should attribute fees correctly', async () => {
+            const pool1Amount = new BigNumber(12345);
+            const pool2Amount = new BigNumber(45678);
+
+            await collectAsync(pool1, pool1Amount, pool1Amount); // ETH
+            await transferFeesAsync(pool1);
+            await collectAsync(pool2, pool2Amount, constants.ZERO_AMOUNT); // WETH
+            await transferFeesAsync(pool2);
+
+            const pool1Balance = await staking.balanceForPool(pool1).callAsync();
+            const pool2Balance = await staking.balanceForPool(pool2).callAsync();
+
+            const balanceWETH = await weth.balanceOf(staking.address).callAsync();
+
+            await expect(balanceWETH).to.bignumber.equal(pool1Balance.plus(pool2Balance));
+
+            // We leave 1 wei behind of both ETH and WETH.
+            await expect(pool1Balance).to.bignumber.equal(pool1Amount.minus(2));
+
+            // Here we paid in WETH, so there's just 1 wei of WETH held back.
+            return expect(pool2Balance).to.bignumber.equal(pool2Amount.minus(1));
+        });
+    });
+});