Add sample whitelist contract

packages/contracts/compiler.json

@@ -33,6 +33,7 @@
         "TestLibs",
         "TestSignatureValidator",
         "TokenRegistry",
+        "Whitelist",
         "WETH9",
         "ZRXToken"
     ]

packages/contracts/package.json

@@ -29,7 +29,7 @@
         "test:circleci": "yarn test"
     },
     "config": {
-        "abis": "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC721Proxy|Exchange|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock||TestAssetProxyDispatcher|TestLibBytes|TestLibs|TestSignatureValidator|TokenRegistry|WETH9|ZRXToken).json"
+        "abis": "../migrations/artifacts/2.0.0/@(AssetProxyOwner|DummyERC20Token|DummyERC721Token|ERC20Proxy|ERC721Proxy|Exchange|MixinAuthorizable|MultiSigWallet|MultiSigWalletWithTimeLock|TestAssetProxyDispatcher|TestLibBytes|TestLibs|TestSignatureValidator|TokenRegistry|Whitelist|WETH9|ZRXToken).json"
     },
     "repository": {
         "type": "git",

packages/contracts/src/contracts/current/test/Whitelist/Whitelist.sol

@@ -0,0 +1,58 @@
+/*
+
+  Copyright 2018 ZeroEx Intl.
+
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+*/
+
+pragma solidity ^0.4.21;
+pragma experimental ABIEncoderV2;
+
+import "../../protocol/Exchange/mixins/MTransactions.sol";
+import "../../protocol/Exchange/LibOrder.sol";
+import "../../utils/Ownable/Ownable.sol";
+
+contract Whitelist is Ownable {
+
+    mapping (address => bool) public isWhitelisted;
+    MTransactions EXCHANGE;
+
+    bytes txOriginSignatureType = new bytes(1);
+
+    function Whitelist(address _exchange)
+        public
+    {
+        EXCHANGE = MTransactions(_exchange);
+        txOriginSignatureType[0] = 0x04;
+    }
+
+    function updateWhitelistStatus(address target, bool isApproved)
+        external
+        onlyOwner
+    {
+        isWhitelisted[target] = isApproved;
+    }
+
+    function fillOrderIfWhitelisted(
+        LibOrder.Order memory order,
+        uint256 takerAssetFillAmount,
+        uint256 salt,
+        bytes memory signature)
+        public
+    {
+        require(isWhitelisted[msg.sender]);
+        bytes memory data = abi.encode(order, takerAssetFillAmount, signature);
+        EXCHANGE.executeTransaction(salt, msg.sender, data, txOriginSignatureType);
+    }
+}