Merge pull request #255 from 0xProject/feature/updateWeth

Update WETH

44 files changed, 909 insertions, 185 deletions

diff --git a/packages/contracts/contracts/Exchange.sol b/packages/contracts/contracts/Exchange.sol
index 02deee967..a402e7ca5 100644
--- a/packages/contracts/contracts/Exchange.sol
+++ b/packages/contracts/contracts/Exchange.sol
@@ -16,11 +16,11 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./TokenTransferProxy.sol";
-import "./base/Token.sol";
-import "./base/SafeMath.sol";
+import "./tokens/Token.sol";
+import "./utils/SafeMath.sol";
 
 /// @title Exchange - Facilitates exchange of ERC20 tokens.
 /// @author Amir Bandeali - <amir@0xProject.com>, Will Warren - <will@0xProject.com>
@@ -600,3 +600,4 @@ contract Exchange is SafeMath {
         return Token(token).allowance.gas(EXTERNAL_QUERY_GAS_LIMIT)(owner, TOKEN_TRANSFER_PROXY_CONTRACT); // Limit gas to prevent reentrancy
     }
 }
+
diff --git a/packages/contracts/contracts/TokenRegistry.sol b/packages/contracts/contracts/TokenRegistry.sol
index d370f8cfe..d2570e71d 100644
--- a/packages/contracts/contracts/TokenRegistry.sol
+++ b/packages/contracts/contracts/TokenRegistry.sol
@@ -16,9 +16,9 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
-import "./base/Ownable.sol";
+import "./utils/Ownable.sol";
 
 /// @title Token Registry - Stores metadata associated with ERC20 tokens. See ERC22 https://github.com/ethereum/EIPs/issues/22
 /// @author Amir Bandeali - <amir@0xProject.com>, Will Warren - <will@0xProject.com>
@@ -306,3 +306,4 @@ contract TokenRegistry is Ownable {
         return tokenAddresses;
     }
 }
+
diff --git a/packages/contracts/contracts/TokenTransferProxy.sol b/packages/contracts/contracts/TokenTransferProxy.sol
index 23b0b9e6d..fd2358496 100644
--- a/packages/contracts/contracts/TokenTransferProxy.sol
+++ b/packages/contracts/contracts/TokenTransferProxy.sol
@@ -16,10 +16,10 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
-import "./base/Token.sol";
-import "./base/Ownable.sol";
+import "./tokens/Token.sol";
+import "./utils/Ownable.sol";
 
 /// @title TokenTransferProxy - Transfers tokens on behalf of contracts that have been approved via decentralized governance.
 /// @author Amir Bandeali - <amir@0xProject.com>, Will Warren - <will@0xProject.com>
@@ -113,3 +113,4 @@ contract TokenTransferProxy is Ownable {
         return authorities;
     }
 }
+
diff --git a/packages/contracts/contracts/base/SafeMath.sol b/packages/contracts/contracts/base/SafeMath.sol
deleted file mode 100644
index fac674a20..000000000
--- a/packages/contracts/contracts/base/SafeMath.sol
+++ /dev/null
@@ -1,41 +0,0 @@
-pragma solidity 0.4.11;
-
-contract SafeMath {
-    function safeMul(uint a, uint b) internal constant returns (uint256) {
-        uint c = a * b;
-        assert(a == 0 || c / a == b);
-        return c;
-    }
-
-    function safeDiv(uint a, uint b) internal constant returns (uint256) {
-        uint c = a / b;
-        return c;
-    }
-
-    function safeSub(uint a, uint b) internal constant returns (uint256) {
-        assert(b <= a);
-        return a - b;
-    }
-
-    function safeAdd(uint a, uint b) internal constant returns (uint256) {
-        uint c = a + b;
-        assert(c >= a);
-        return c;
-    }
-
-    function max64(uint64 a, uint64 b) internal constant returns (uint64) {
-        return a >= b ? a : b;
-    }
-
-    function min64(uint64 a, uint64 b) internal constant returns (uint64) {
-        return a < b ? a : b;
-    }
-
-    function max256(uint256 a, uint256 b) internal constant returns (uint256) {
-        return a >= b ? a : b;
-    }
-
-    function min256(uint256 a, uint256 b) internal constant returns (uint256) {
-        return a < b ? a : b;
-    }
-}
diff --git a/packages/contracts/contracts/base/MultiSigWallet.sol b/packages/contracts/contracts/multisig/MultiSigWallet.sol
index 7531224ea..ae7ef06fd 100644
--- a/packages/contracts/contracts/base/MultiSigWallet.sol
+++ b/packages/contracts/contracts/multisig/MultiSigWallet.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 /// @title Multisignature wallet - Allows multiple parties to agree on transactions before execution.
 /// @author Stefan George - <stefan.george@consensys.net>
@@ -363,3 +363,4 @@ contract MultiSigWallet {
             _transactionIds[i - from] = transactionIdsTemp[i];
     }
 }
+
diff --git a/packages/contracts/contracts/MultiSigWalletWithTimeLock.sol b/packages/contracts/contracts/multisig/MultiSigWalletWithTimeLock.sol
index 70123e6b6..62273eba3 100644
--- a/packages/contracts/contracts/MultiSigWalletWithTimeLock.sol
+++ b/packages/contracts/contracts/multisig/MultiSigWalletWithTimeLock.sol
@@ -16,9 +16,9 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
-import "./base/MultiSigWallet.sol";
+import "./MultiSigWallet.sol";
 
 /// @title Multisignature wallet with time lock- Allows multiple parties to execute a transaction after a time lock has passed.
 /// @author Amir Bandeali - <amir@0xProject.com>
@@ -130,3 +130,4 @@ contract MultiSigWalletWithTimeLock is MultiSigWallet {
         ConfirmationTimeSet(transactionId, confirmationTime);
     }
 }
+
diff --git a/packages/contracts/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.sol b/packages/contracts/contracts/multisig/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.sol
index 15fdb1d07..07beb9f5b 100644
--- a/packages/contracts/contracts/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.sol
+++ b/packages/contracts/contracts/multisig/MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./MultiSigWalletWithTimeLock.sol";
 
@@ -80,3 +80,4 @@ contract MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress is MultiSigWall
         return true;
     }
 }
+
diff --git a/packages/contracts/contracts/test/DummyToken.sol b/packages/contracts/contracts/test/DummyToken.sol
index 414c17b2a..046af3059 100644
--- a/packages/contracts/contracts/test/DummyToken.sol
+++ b/packages/contracts/contracts/test/DummyToken.sol
@@ -1,7 +1,7 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./Mintable.sol";
-import "./../base/Ownable.sol";
+import "./../utils/Ownable.sol";
 
 contract DummyToken is Mintable, Ownable {
     string public name;
@@ -21,7 +21,9 @@ contract DummyToken is Mintable, Ownable {
         balances[msg.sender] = _totalSupply;
     }
 
-    function setBalance(address _target, uint _value) onlyOwner {
+    function setBalance(address _target, uint _value)
+        onlyOwner 
+    {
         uint currBalance = balanceOf(_target);
         if (_value < currBalance) {
             totalSupply = safeSub(totalSupply, safeSub(currBalance, _value));
@@ -31,3 +33,4 @@ contract DummyToken is Mintable, Ownable {
         balances[_target] = _value;
     }
 }
+
diff --git a/packages/contracts/contracts/test/DummyToken_v2.sol b/packages/contracts/contracts/test/DummyToken_v2.sol
new file mode 100644
index 000000000..bd4d06be9
--- /dev/null
+++ b/packages/contracts/contracts/test/DummyToken_v2.sol
@@ -0,0 +1,38 @@
+pragma solidity 0.4.18;
+
+import "./Mintable_v2.sol";
+import "./../utils/Ownable_v2.sol";
+
+contract DummyToken_v2 is Mintable_v2, Ownable_v2 {
+    string public name;
+    string public symbol;
+    uint public decimals;
+
+    function DummyToken_v2(
+        string _name,
+        string _symbol,
+        uint _decimals,
+        uint _totalSupply)
+        public
+    {
+        name = _name;
+        symbol = _symbol;
+        decimals = _decimals;
+        totalSupply = _totalSupply;
+        balances[msg.sender] = _totalSupply;
+    }
+
+    function setBalance(address _target, uint _value) 
+        public
+        onlyOwner 
+    {
+        uint currBalance = balanceOf(_target);
+        if (_value < currBalance) {
+            totalSupply = safeSub(totalSupply, safeSub(currBalance, _value));
+        } else {
+            totalSupply = safeAdd(totalSupply, safeSub(_value, currBalance));
+        }
+        balances[_target] = _value;
+    }
+}
+
diff --git a/packages/contracts/contracts/test/MaliciousToken.sol b/packages/contracts/contracts/test/MaliciousToken.sol
index 3c1a53612..3e7d5d1a5 100644
--- a/packages/contracts/contracts/test/MaliciousToken.sol
+++ b/packages/contracts/contracts/test/MaliciousToken.sol
@@ -1,11 +1,13 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
-import "./../base/StandardToken.sol";
+import "./../tokens/StandardToken.sol";
 
 contract MaliciousToken is StandardToken {
     uint8 stateToUpdate = 1;  // Not null so that change only requires 5000 gas
 
-    function updateState() internal {
+    function updateState() 
+        internal 
+    {
         stateToUpdate++;
     }
 
@@ -27,3 +29,4 @@ contract MaliciousToken is StandardToken {
         return allowed[_owner][_spender];
     }
 }
+
diff --git a/packages/contracts/contracts/test/Mintable.sol b/packages/contracts/contracts/test/Mintable.sol
index c0438f304..3b91415ef 100644
--- a/packages/contracts/contracts/test/Mintable.sol
+++ b/packages/contracts/contracts/test/Mintable.sol
@@ -1,16 +1,19 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./../tokens/UnlimitedAllowanceToken.sol";
-import "./../base/SafeMath.sol";
+import "./../utils/SafeMath.sol";
 
 /*
  * Mintable
  * Base contract that creates a mintable UnlimitedAllowanceToken
  */
 contract Mintable is UnlimitedAllowanceToken, SafeMath {
-    function mint(uint _value) {
+    function mint(uint _value) 
+        public
+    {
         require(_value <= 100000000000000000000);
         balances[msg.sender] = safeAdd(_value, balances[msg.sender]);
         totalSupply = safeAdd(totalSupply, _value);
     }
 }
+
diff --git a/packages/contracts/contracts/test/Mintable_v2.sol b/packages/contracts/contracts/test/Mintable_v2.sol
new file mode 100644
index 000000000..829145cfb
--- /dev/null
+++ b/packages/contracts/contracts/test/Mintable_v2.sol
@@ -0,0 +1,19 @@
+pragma solidity 0.4.18;
+
+import "./../tokens/UnlimitedAllowanceToken_v2.sol";
+import "./../utils/SafeMath_v2.sol";
+
+/*
+ * Mintable
+ * Base contract that creates a mintable UnlimitedAllowanceToken
+ */
+contract Mintable_v2 is UnlimitedAllowanceToken_v2, SafeMath_v2 {
+    function mint(uint _value) 
+        public
+    {
+        require(_value <= 100000000000000000000);
+        balances[msg.sender] = safeAdd(_value, balances[msg.sender]);
+        totalSupply = safeAdd(totalSupply, _value);
+    }
+}
+
diff --git a/packages/contracts/contracts/tokens/ERC20Token.sol b/packages/contracts/contracts/tokens/ERC20Token.sol
new file mode 100644
index 000000000..318da8c01
--- /dev/null
+++ b/packages/contracts/contracts/tokens/ERC20Token.sol
@@ -0,0 +1,59 @@
+pragma solidity 0.4.18;
+
+import "./Token_v2.sol";
+
+contract ERC20Token is Token_v2 {
+
+    function transfer(address _to, uint _value)
+        public
+        returns (bool) 
+    {
+        require(balances[msg.sender] >= _value && balances[_to] + _value >= balances[_to]); 
+        balances[msg.sender] -= _value;
+        balances[_to] += _value;
+        Transfer(msg.sender, _to, _value);
+        return true;
+    }
+
+    function transferFrom(address _from, address _to, uint _value)
+        public 
+        returns (bool) 
+    {
+        require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value >= balances[_to]); 
+        balances[_to] += _value;
+        balances[_from] -= _value;
+        allowed[_from][msg.sender] -= _value;
+        Transfer(_from, _to, _value);
+        return true;
+    }
+
+    function approve(address _spender, uint _value) 
+        public
+        returns (bool)
+    {
+        allowed[msg.sender][_spender] = _value;
+        Approval(msg.sender, _spender, _value);
+        return true;
+    }
+
+    function balanceOf(address _owner)
+        public
+        view
+        returns (uint)
+    {
+        return balances[_owner];
+    }
+
+    function allowance(address _owner, address _spender) 
+        public
+        view
+        returns (uint)
+    {
+        return allowed[_owner][_spender];
+    }
+
+    mapping (address => uint) balances;
+    mapping (address => mapping (address => uint)) allowed;
+    uint public totalSupply;
+}
+
diff --git a/packages/contracts/contracts/tokens/EtherToken.sol b/packages/contracts/contracts/tokens/EtherToken.sol
index 68148e095..2eae012fc 100644
--- a/packages/contracts/contracts/tokens/EtherToken.sol
+++ b/packages/contracts/contracts/tokens/EtherToken.sol
@@ -16,10 +16,10 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./UnlimitedAllowanceToken.sol";
-import "./../base/SafeMath.sol";
+import "./../utils/SafeMath.sol";
 
 contract EtherToken is UnlimitedAllowanceToken, SafeMath {
 
@@ -54,3 +54,4 @@ contract EtherToken is UnlimitedAllowanceToken, SafeMath {
         require(msg.sender.send(amount));
     }
 }
+
diff --git a/packages/contracts/contracts/tokens/EtherToken_v2.sol b/packages/contracts/contracts/tokens/EtherToken_v2.sol
new file mode 100644
index 000000000..f172c8e35
--- /dev/null
+++ b/packages/contracts/contracts/tokens/EtherToken_v2.sol
@@ -0,0 +1,60 @@
+/*
+
+  Copyright 2017 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 0.4.18;
+
+import "./UnlimitedAllowanceToken_v2.sol";
+import "./../utils/SafeMath_v2.sol";
+
+contract EtherToken_v2 is UnlimitedAllowanceToken_v2, SafeMath_v2 {
+
+    string constant public name = "Ether Token";
+    string constant public symbol = "WETH";
+    string constant public version = "2.0.0"; // version 1.0.0 deployed on mainnet at 0x2956356cd2a2bf3202f771f50d3d14a367b48070
+    uint8 constant public decimals = 18;
+
+    /// @dev Fallback to calling deposit when ether is sent directly to contract.
+    function()
+        public
+        payable
+    {
+        deposit();
+    }
+
+    /// @dev Buys tokens with Ether, exchanging them 1:1.
+    function deposit()
+        public
+        payable
+    {
+        balances[msg.sender] = safeAdd(balances[msg.sender], msg.value);
+        totalSupply = safeAdd(totalSupply, msg.value);
+        Transfer(address(0), msg.sender, msg.value);
+    }
+
+    /// @dev Sells tokens in exchange for Ether, exchanging them 1:1.
+    /// @param _value Number of tokens to sell.
+    function withdraw(uint _value)
+        public
+    {
+        balances[msg.sender] = safeSub(balances[msg.sender], _value);
+        totalSupply = safeSub(totalSupply, _value);
+        require(msg.sender.send(_value));
+        Transfer(msg.sender, address(0), _value);
+    }
+}
+
diff --git a/packages/contracts/contracts/base/StandardToken.sol b/packages/contracts/contracts/tokens/StandardToken.sol
index e0719d89a..9cd53d94a 100644
--- a/packages/contracts/contracts/base/StandardToken.sol
+++ b/packages/contracts/contracts/tokens/StandardToken.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./Token.sol";
 
@@ -42,3 +42,4 @@ contract StandardToken is Token {
     mapping (address => mapping (address => uint)) allowed;
     uint public totalSupply;
 }
+
diff --git a/packages/contracts/contracts/base/Token.sol b/packages/contracts/contracts/tokens/Token.sol
index c6a55c2c0..507de9b12 100644
--- a/packages/contracts/contracts/base/Token.sol
+++ b/packages/contracts/contracts/tokens/Token.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 contract Token {
 
@@ -36,3 +36,4 @@ contract Token {
     event Transfer(address indexed _from, address indexed _to, uint _value);
     event Approval(address indexed _owner, address indexed _spender, uint _value);
 }
+
diff --git a/packages/contracts/contracts/tokens/Token_v2.sol b/packages/contracts/contracts/tokens/Token_v2.sol
new file mode 100644
index 000000000..027f706f4
--- /dev/null
+++ b/packages/contracts/contracts/tokens/Token_v2.sol
@@ -0,0 +1,39 @@
+pragma solidity 0.4.18;
+
+contract Token_v2 {
+
+    /// @return total amount of tokens
+    function totalSupply() public view returns (uint) {}
+
+    /// @notice send `_value` token to `_to` from `msg.sender`
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    /// @return Whether the transfer was successful or not
+    function transfer(address _to, uint _value) public returns (bool) {}
+
+    /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
+    /// @param _from The address of the sender
+    /// @param _to The address of the recipient
+    /// @param _value The amount of token to be transferred
+    /// @return Whether the transfer was successful or not
+    function transferFrom(address _from, address _to, uint _value) public returns (bool) {}
+
+    /// @notice `msg.sender` approves `_addr` to spend `_value` tokens
+    /// @param _spender The address of the account able to transfer the tokens
+    /// @param _value The amount of wei to be approved for transfer
+    /// @return Whether the approval was successful or not
+    function approve(address _spender, uint _value) public returns (bool) {}
+
+    /// @param _owner The address from which the balance will be retrieved
+    /// @return The balance
+    function balanceOf(address _owner) public view returns (uint) {}
+
+    /// @param _owner The address of the account owning tokens
+    /// @param _spender The address of the account able to transfer the tokens
+    /// @return Amount of remaining tokens allowed to spent
+    function allowance(address _owner, address _spender) public view returns (uint) {}
+
+    event Transfer(address indexed _from, address indexed _to, uint _value);
+    event Approval(address indexed _owner, address indexed _spender, uint _value);
+}
+
diff --git a/packages/contracts/contracts/tokens/UnlimitedAllowanceToken.sol b/packages/contracts/contracts/tokens/UnlimitedAllowanceToken.sol
index 40e01b360..0994cfae4 100644
--- a/packages/contracts/contracts/tokens/UnlimitedAllowanceToken.sol
+++ b/packages/contracts/contracts/tokens/UnlimitedAllowanceToken.sol
@@ -16,9 +16,9 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
-import "./../base/StandardToken.sol";
+import "./StandardToken.sol";
 
 contract UnlimitedAllowanceToken is StandardToken {
 
@@ -50,3 +50,4 @@ contract UnlimitedAllowanceToken is StandardToken {
         }
     }
 }
+
diff --git a/packages/contracts/contracts/tokens/UnlimitedAllowanceToken_v2.sol b/packages/contracts/contracts/tokens/UnlimitedAllowanceToken_v2.sol
new file mode 100644
index 000000000..b2caab8af
--- /dev/null
+++ b/packages/contracts/contracts/tokens/UnlimitedAllowanceToken_v2.sol
@@ -0,0 +1,47 @@
+/*
+
+  Copyright 2017 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 0.4.18;
+
+import "./ERC20Token.sol";
+
+contract UnlimitedAllowanceToken_v2 is ERC20Token {
+
+    uint constant MAX_UINT = 2**256 - 1;
+
+    /// @dev ERC20 transferFrom, modified such that an allowance of MAX_UINT represents an unlimited allowance. See https://github.com/ethereum/EIPs/issues/717
+    /// @param _from Address to transfer from.
+    /// @param _to Address to transfer to.
+    /// @param _value Amount to transfer.
+    /// @return Success of transfer.
+    function transferFrom(address _from, address _to, uint _value)
+        public 
+        returns (bool) 
+    {
+        uint allowance = allowed[_from][msg.sender];
+        require(balances[_from] >= _value && allowance >= _value && balances[_to] + _value >= balances[_to]); 
+        balances[_to] += _value;
+        balances[_from] -= _value;
+        if (allowance < MAX_UINT) {
+            allowed[_from][msg.sender] -= _value;
+        }
+        Transfer(_from, _to, _value);
+        return true;
+    }
+}
+
diff --git a/packages/contracts/contracts/tokens/ZRXToken.sol b/packages/contracts/contracts/tokens/ZRXToken.sol
index c8b9c08ab..af1dfac99 100644
--- a/packages/contracts/contracts/tokens/ZRXToken.sol
+++ b/packages/contracts/contracts/tokens/ZRXToken.sol
@@ -16,7 +16,7 @@
 
 */
 
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 import "./UnlimitedAllowanceToken.sol";
 
@@ -31,3 +31,4 @@ contract ZRXToken is UnlimitedAllowanceToken {
         balances[msg.sender] = totalSupply;
     }
 }
+
diff --git a/packages/contracts/contracts/base/Ownable.sol b/packages/contracts/contracts/utils/Ownable.sol
index b7d6ac71c..77fdaf085 100644
--- a/packages/contracts/contracts/base/Ownable.sol
+++ b/packages/contracts/contracts/utils/Ownable.sol
@@ -1,4 +1,4 @@
-pragma solidity 0.4.11;
+pragma solidity ^0.4.11;
 
 /*
  * Ownable
@@ -25,3 +25,4 @@ contract Ownable {
         }
     }
 }
+
diff --git a/packages/contracts/contracts/utils/Ownable_v2.sol b/packages/contracts/contracts/utils/Ownable_v2.sol
new file mode 100644
index 000000000..77e1fed08
--- /dev/null
+++ b/packages/contracts/contracts/utils/Ownable_v2.sol
@@ -0,0 +1,33 @@
+pragma solidity 0.4.18;
+
+/*
+ * Ownable
+ *
+ * Base contract with an owner.
+ * Provides onlyOwner modifier, which prevents function from running if it is called by anyone other than the owner.
+ */
+
+contract Ownable_v2 {
+    address public owner;
+
+    function Ownable_v2()
+        public
+    {
+        owner = msg.sender;
+    }
+
+    modifier onlyOwner() {
+        require(msg.sender == owner);
+        _;
+    }
+
+    function transferOwnership(address newOwner)
+        public
+        onlyOwner 
+    {
+        if (newOwner != address(0)) {
+            owner = newOwner;
+        }
+    }
+}
+
diff --git a/packages/contracts/contracts/utils/SafeMath.sol b/packages/contracts/contracts/utils/SafeMath.sol
new file mode 100644
index 000000000..a7891a7af
--- /dev/null
+++ b/packages/contracts/contracts/utils/SafeMath.sol
@@ -0,0 +1,74 @@
+pragma solidity ^0.4.11;
+
+contract SafeMath {
+    function safeMul(uint a, uint b)
+        internal
+        constant 
+        returns (uint256) 
+    {
+        uint c = a * b;
+        assert(a == 0 || c / a == b);
+        return c;
+    }
+
+    function safeDiv(uint a, uint b)
+        internal 
+        constant 
+        returns (uint256) 
+    {
+        uint c = a / b;
+        return c;
+    }
+
+    function safeSub(uint a, uint b) 
+        internal 
+        constant 
+        returns (uint256) 
+    {
+        assert(b <= a);
+        return a - b;
+    }
+
+    function safeAdd(uint a, uint b) 
+        internal 
+        constant 
+        returns (uint256) 
+    {
+        uint c = a + b;
+        assert(c >= a);
+        return c;
+    }
+
+    function max64(uint64 a, uint64 b) 
+        internal 
+        constant 
+        returns (uint64) 
+    {
+        return a >= b ? a : b;
+    }
+
+    function min64(uint64 a, uint64 b) 
+        internal 
+        constant 
+        returns (uint64) 
+    {
+        return a < b ? a : b;
+    }
+
+    function max256(uint256 a, uint256 b) 
+        internal 
+        constant 
+        returns (uint256) 
+    {
+        return a >= b ? a : b;
+    }
+
+    function min256(uint256 a, uint256 b) 
+        internal 
+        constant 
+        returns (uint256) 
+    {
+        return a < b ? a : b;
+    }
+}
+
diff --git a/packages/contracts/contracts/utils/SafeMath_v2.sol b/packages/contracts/contracts/utils/SafeMath_v2.sol
new file mode 100644
index 000000000..6eda03999
--- /dev/null
+++ b/packages/contracts/contracts/utils/SafeMath_v2.sol
@@ -0,0 +1,74 @@
+pragma solidity 0.4.18;
+
+contract SafeMath_v2 {
+    function safeMul(uint a, uint b)
+        internal
+        pure
+        returns (uint256)
+    {
+        uint c = a * b;
+        assert(a == 0 || c / a == b);
+        return c;
+    }
+
+    function safeDiv(uint a, uint b)
+        internal
+        pure
+        returns (uint256)
+    {
+        uint c = a / b;
+        return c;
+    }
+
+    function safeSub(uint a, uint b)
+        internal
+        pure
+        returns (uint256)
+    {
+        assert(b <= a);
+        return a - b;
+    }
+
+    function safeAdd(uint a, uint b)
+        internal
+        pure
+        returns (uint256)
+    {
+        uint c = a + b;
+        assert(c >= a);
+        return c;
+    }
+
+    function max64(uint64 a, uint64 b)
+        internal
+        pure
+        returns (uint256)
+    {
+        return a >= b ? a : b;
+    }
+
+    function min64(uint64 a, uint64 b)
+        internal
+        pure
+        returns (uint256)
+    {
+        return a < b ? a : b;
+    }
+
+    function max256(uint256 a, uint256 b)
+        internal
+        pure
+        returns (uint256)
+    {
+        return a >= b ? a : b;
+    }
+
+    function min256(uint256 a, uint256 b)
+        internal
+        pure
+        returns (uint256)
+    {
+        return a < b ? a : b;
+    }
+}
+
diff --git a/packages/contracts/deploy/test/util/constants.ts b/packages/contracts/deploy/test/util/constants.ts
index a2de44b63..65525a1f7 100644
--- a/packages/contracts/deploy/test/util/constants.ts
+++ b/packages/contracts/deploy/test/util/constants.ts
@@ -5,7 +5,7 @@ export const constants = {
     jsonrpcPort: 8545,
     optimizerEnabled: 0,
     gasPrice: new BigNumber(20000000000),
-    timeoutMs: 12000,
+    timeoutMs: 20000,
     zrxTokenAddress: '0xe41d2489571d322189246dafa5ebde1f4699f498',
     tokenTransferProxyAddress: '0x8da0d80f5007ef1e431dd2127178d224e32c2ef4',
 };
diff --git a/packages/contracts/migrations/2_deploy_independent_contracts.ts b/packages/contracts/migrations/2_deploy_independent_contracts.ts
index 878860eb6..db9fc370d 100644
--- a/packages/contracts/migrations/2_deploy_independent_contracts.ts
+++ b/packages/contracts/migrations/2_deploy_independent_contracts.ts
@@ -4,6 +4,7 @@ const {
     MultiSigWalletWithTimeLock,
     TokenTransferProxy,
     EtherToken,
+    EtherTokenV2,
     TokenRegistry,
 } = new Artifacts(artifacts);
 
@@ -28,11 +29,13 @@ module.exports = (deployer: any, network: string, accounts: string[]) => {
             deployer.deploy(MultiSigWalletWithTimeLock, config.owners,
                             config.confirmationsRequired, config.secondsRequired)
             .then(() => {
-                    return deployer.deploy(TokenTransferProxy);
+                return deployer.deploy(TokenTransferProxy);
             }).then(() => {
-                    return deployer.deploy(TokenRegistry);
+                return deployer.deploy(TokenRegistry);
             }).then(() => {
-                    return deployer.deploy(EtherToken);
+                return deployer.deploy(EtherToken);
+            }).then(() => {
+                return deployer.deploy(EtherTokenV2);
             });
     } else {
         deployer.deploy([
diff --git a/packages/contracts/package.json b/packages/contracts/package.json
index d2f30933a..f4d0b5865 100644
--- a/packages/contracts/package.json
+++ b/packages/contracts/package.json
@@ -15,6 +15,7 @@
     "migrate:truffle": "npm run build; truffle migrate",
     "migrate": "npm run build; node lib/deploy/cli.js migrate",
     "lint": "tslint --project . 'migrations/**/*.ts' 'test/**/*.ts' 'util/**/*.ts' 'deploy/**/*.ts'",
+    "test:circleci": "yarn test; yarn test:deployer",
     "test:deployer": "npm run build; mocha lib/deploy/test/*_test.js"
   },
   "repository": {
@@ -31,7 +32,6 @@
     "@0xproject/tslint-config": "^0.2.1",
     "@0xproject/types": "^0.1.0",
     "@types/bluebird": "^3.5.3",
-    "@types/isomorphic-fetch": "^0.0.34",
     "@types/lodash": "^4.14.86",
     "@types/node": "^8.0.53",
     "@types/request-promise-native": "^1.0.2",
@@ -45,7 +45,7 @@
     "dirty-chai": "^2.0.1",
     "mocha": "^4.0.1",
     "solc": "^0.4.18",
-    "truffle": "3.4.3",
+    "truffle": "^4.0.1",
     "tslint": "5.8.0",
     "types-bn": "^0.0.1",
     "types-ethereumjs-util": "0xProject/types-ethereumjs-util",
@@ -54,7 +54,7 @@
     "yargs": "^10.0.3"
   },
   "dependencies": {
-    "0x.js": "^0.22.6",
+    "0x.js": "^0.27.1",
     "@0xproject/json-schemas": "^0.6.10",
     "@0xproject/utils": "^0.1.0",
     "@0xproject/web3-wrapper": "^0.1.0",
diff --git a/packages/contracts/test/ts/ether_token.ts b/packages/contracts/test/ts/ether_token.ts
index dbb4d2ee6..2f9df59a4 100644
--- a/packages/contracts/test/ts/ether_token.ts
+++ b/packages/contracts/test/ts/ether_token.ts
@@ -5,6 +5,7 @@ import * as chai from 'chai';
 import Web3 = require('web3');
 
 import {Artifacts} from '../../util/artifacts';
+import {constants} from '../../util/constants';
 
 import {chaiSetup} from './utils/chai_setup';
 
@@ -22,11 +23,13 @@ contract('EtherToken', (accounts: string[]) => {
     const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9);
     let zeroEx: ZeroEx;
     let etherTokenAddress: string;
+
     before(async () => {
         etherTokenAddress = EtherToken.address;
         zeroEx = new ZeroEx(web3.currentProvider, {
-                gasPrice,
-                etherTokenContractAddress: etherTokenAddress,
+            gasPrice,
+            etherTokenContractAddress: etherTokenAddress,
+            networkId: constants.TESTRPC_NETWORK_ID,
         });
     });
 
@@ -78,7 +81,9 @@ contract('EtherToken', (accounts: string[]) => {
             const initEthBalance = await getEthBalanceAsync(account);
             const ethTokensToWithdraw = initEthTokenBalance;
             expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
-            const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account);
+            const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account, {
+                gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS,
+            });
             const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
 
             const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
diff --git a/packages/contracts/test/ts/ether_token_v2.ts b/packages/contracts/test/ts/ether_token_v2.ts
new file mode 100644
index 000000000..b88fef579
--- /dev/null
+++ b/packages/contracts/test/ts/ether_token_v2.ts
@@ -0,0 +1,168 @@
+import {ZeroEx, ZeroExError} from '0x.js';
+import {promisify} from '@0xproject/utils';
+import {BigNumber} from 'bignumber.js';
+import * as chai from 'chai';
+import Web3 = require('web3');
+
+import {Artifacts} from '../../util/artifacts';
+import {constants} from '../../util/constants';
+
+import {chaiSetup} from './utils/chai_setup';
+
+const {EtherTokenV2} = new Artifacts(artifacts);
+
+chaiSetup.configure();
+const expect = chai.expect;
+
+// In order to benefit from type-safety, we re-assign the global web3 instance injected by Truffle
+// with type `any` to a variable of type `Web3`.
+const web3: Web3 = (global as any).web3;
+
+contract('EtherTokenV2', (accounts: string[]) => {
+    const account = accounts[0];
+    const gasPrice = ZeroEx.toBaseUnitAmount(new BigNumber(20), 9);
+    let zeroEx: ZeroEx;
+    let etherTokenAddress: string;
+    beforeEach(async () => {
+        const etherToken = await EtherTokenV2.new();
+        etherTokenAddress = etherToken.address;
+        zeroEx = new ZeroEx(web3.currentProvider, {
+            gasPrice,
+            etherTokenContractAddress: etherTokenAddress,
+            networkId: constants.TESTRPC_NETWORK_ID,
+        });
+    });
+
+    const sendTransactionAsync = promisify<string>(web3.eth.sendTransaction);
+    const getEthBalanceAsync = async (owner: string) => {
+        const balanceStr = await promisify<string>(web3.eth.getBalance)(owner);
+        const balance = new BigNumber(balanceStr);
+        return balance;
+    };
+
+    describe('deposit', () => {
+        it('should throw if caller attempts to deposit more Ether than caller balance', async () => {
+            const initEthBalance = await getEthBalanceAsync(account);
+            const ethToDeposit = initEthBalance.plus(1);
+
+            return expect(zeroEx.etherToken.depositAsync(ethToDeposit, account))
+                .to.be.rejectedWith(ZeroExError.InsufficientEthBalanceForDeposit);
+        });
+
+        it('should convert deposited Ether to wrapped Ether tokens', async () => {
+            const initEthBalance = await getEthBalanceAsync(account);
+            const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+
+            const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
+
+            const txHash = await zeroEx.etherToken.depositAsync(ethToDeposit, account);
+            const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
+
+            const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
+            const finalEthBalance = await getEthBalanceAsync(account);
+            const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+
+            expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
+            expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
+        });
+
+        it('should log 1 event with correct arguments', async () => {
+            const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
+
+            const txHash = await zeroEx.etherToken.depositAsync(ethToDeposit, account);
+            const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
+
+            const logs = receipt.logs;
+            expect(logs.length).to.equal(1);
+
+            const expectedFrom = ZeroEx.NULL_ADDRESS;
+            const expectedTo = account;
+            const expectedValue = ethToDeposit;
+            const logArgs = (logs[0] as any).args;
+            expect(logArgs._from).to.equal(expectedFrom);
+            expect(logArgs._to).to.equal(expectedTo);
+            expect(logArgs._value).to.be.bignumber.equal(ethToDeposit);
+        });
+    });
+
+    describe('withdraw', () => {
+        beforeEach(async () => {
+            const ethToDeposit = new BigNumber(web3.toWei(1, 'ether'));
+            await zeroEx.etherToken.depositAsync(ethToDeposit, account);
+        });
+
+        it('should throw if caller attempts to withdraw greater than caller balance', async () => {
+            const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+            const ethTokensToWithdraw = initEthTokenBalance.plus(1);
+
+            return expect(zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account))
+                .to.be.rejectedWith(ZeroExError.InsufficientWEthBalanceForWithdrawal);
+        });
+
+        it('should convert ether tokens to ether with sufficient balance', async () => {
+            const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+            const initEthBalance = await getEthBalanceAsync(account);
+            const ethTokensToWithdraw = initEthTokenBalance;
+            expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
+            const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account, {
+                gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS,
+            });
+            const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
+
+            const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
+            const finalEthBalance = await getEthBalanceAsync(account);
+            const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+
+            expect(finalEthBalance).to.be.bignumber
+                .equal(initEthBalance.plus(ethTokensToWithdraw.minus(ethSpentOnGas)));
+            expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.minus(ethTokensToWithdraw));
+        });
+
+        it('should log 1 event with correct arguments', async () => {
+            const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+            const initEthBalance = await getEthBalanceAsync(account);
+            const ethTokensToWithdraw = initEthTokenBalance;
+            expect(ethTokensToWithdraw).to.not.be.bignumber.equal(0);
+            const txHash = await zeroEx.etherToken.withdrawAsync(ethTokensToWithdraw, account, {
+                gasLimit: constants.MAX_ETHERTOKEN_WITHDRAW_GAS,
+            });
+            const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
+
+            const logs = receipt.logs;
+            expect(logs.length).to.equal(1);
+
+            const expectedFrom = account;
+            const expectedTo = ZeroEx.NULL_ADDRESS;
+            const expectedValue = ethTokensToWithdraw;
+            const logArgs = (logs[0] as any).args;
+            expect(logArgs._from).to.equal(expectedFrom);
+            expect(logArgs._to).to.equal(expectedTo);
+            expect(logArgs._value).to.be.bignumber.equal(ethTokensToWithdraw);
+        });
+    });
+
+    describe('fallback', () => {
+        it('should convert sent ether to ether tokens', async () => {
+            const initEthBalance = await getEthBalanceAsync(account);
+            const initEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+
+            const ethToDeposit = ZeroEx.toBaseUnitAmount(new BigNumber(1), 18);
+
+            const txHash = await sendTransactionAsync({
+                from: account,
+                to: etherTokenAddress,
+                value: ethToDeposit,
+                gasPrice,
+            });
+
+            const receipt = await zeroEx.awaitTransactionMinedAsync(txHash);
+
+            const ethSpentOnGas = gasPrice.times(receipt.gasUsed);
+            const finalEthBalance = await getEthBalanceAsync(account);
+            const finalEthTokenBalance = await zeroEx.token.getBalanceAsync(etherTokenAddress, account);
+
+            expect(finalEthBalance).to.be.bignumber.equal(initEthBalance.minus(ethToDeposit.plus(ethSpentOnGas)));
+            expect(finalEthTokenBalance).to.be.bignumber.equal(initEthTokenBalance.plus(ethToDeposit));
+        });
+    });
+});
diff --git a/packages/contracts/test/ts/exchange/core.ts b/packages/contracts/test/ts/exchange/core.ts
index daf46ca37..641084937 100644
--- a/packages/contracts/test/ts/exchange/core.ts
+++ b/packages/contracts/test/ts/exchange/core.ts
@@ -59,6 +59,7 @@ contract('Exchange', (accounts: string[]) => {
         exWrapper = new ExchangeWrapper(exchange);
         zeroEx = new ZeroEx(web3.currentProvider, {
             exchangeContractAddress: exchange.address,
+            networkId: constants.TESTRPC_NETWORK_ID,
         });
 
         const [repAddress, dgdAddress, zrxAddress] = await Promise.all([
@@ -422,7 +423,7 @@ contract('Exchange', (accounts: string[]) => {
                 takerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(200), 18),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if signature is invalid', async () => {
@@ -432,7 +433,7 @@ contract('Exchange', (accounts: string[]) => {
 
             order.params.r = ethUtil.bufferToHex(ethUtil.sha3('invalidR'));
             order.params.s = ethUtil.bufferToHex(ethUtil.sha3('invalidS'));
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if makerTokenAmount is 0', async () => {
@@ -440,7 +441,7 @@ contract('Exchange', (accounts: string[]) => {
                 makerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if takerTokenAmount is 0', async () => {
@@ -448,14 +449,14 @@ contract('Exchange', (accounts: string[]) => {
                 takerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.fillOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if fillTakerTokenAmount is 0', async () => {
             order = await orderFactory.newSignedOrderAsync();
 
             return expect(exWrapper.fillOrderAsync(order, taker, {fillTakerTokenAmount: new BigNumber(0)}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should not change balances if maker balances are too low to fill order and \
@@ -478,7 +479,7 @@ contract('Exchange', (accounts: string[]) => {
             });
 
             return expect(exWrapper.fillOrderAsync(order, taker, {shouldThrowOnInsufficientBalanceOrAllowance: true}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should not change balances if taker balances are too low to fill order and \
@@ -501,7 +502,7 @@ contract('Exchange', (accounts: string[]) => {
             });
 
             return expect(exWrapper.fillOrderAsync(order, taker, {shouldThrowOnInsufficientBalanceOrAllowance: true}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should not change balances if maker allowances are too low to fill order and \
@@ -520,7 +521,7 @@ contract('Exchange', (accounts: string[]) => {
        async () => {
             await rep.approve(TokenTransferProxy.address, 0, {from: maker});
             expect(exWrapper.fillOrderAsync(order, taker, {shouldThrowOnInsufficientBalanceOrAllowance: true}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
             await rep.approve(TokenTransferProxy.address, INITIAL_ALLOWANCE, {from: maker});
         });
 
@@ -540,7 +541,7 @@ contract('Exchange', (accounts: string[]) => {
        async () => {
             await dgd.approve(TokenTransferProxy.address, 0, {from: taker});
             expect(exWrapper.fillOrderAsync(order, taker, {shouldThrowOnInsufficientBalanceOrAllowance: true}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
             await dgd.approve(TokenTransferProxy.address, INITIAL_ALLOWANCE, {from: taker});
         });
 
@@ -610,7 +611,7 @@ contract('Exchange', (accounts: string[]) => {
             });
 
             return expect(exWrapper.fillOrderAsync(order, taker, {shouldThrowOnInsufficientBalanceOrAllowance: false}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should not change balances if an order is expired', async () => {
@@ -651,7 +652,7 @@ contract('Exchange', (accounts: string[]) => {
         });
 
         it('should throw if not sent by maker', async () => {
-            return expect(exWrapper.cancelOrderAsync(order, taker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.cancelOrderAsync(order, taker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if makerTokenAmount is 0', async () => {
@@ -659,7 +660,7 @@ contract('Exchange', (accounts: string[]) => {
                 makerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if takerTokenAmount is 0', async () => {
@@ -667,14 +668,14 @@ contract('Exchange', (accounts: string[]) => {
                 takerTokenAmount: new BigNumber(0),
             });
 
-            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(exWrapper.cancelOrderAsync(order, maker)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if cancelTakerTokenAmount is 0', async () => {
             order = await orderFactory.newSignedOrderAsync();
 
             return expect(exWrapper.cancelOrderAsync(order, maker, {cancelTakerTokenAmount: new BigNumber(0)}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should be able to cancel a full order', async () => {
diff --git a/packages/contracts/test/ts/exchange/wrapper.ts b/packages/contracts/test/ts/exchange/wrapper.ts
index c40d60104..3097f6887 100644
--- a/packages/contracts/test/ts/exchange/wrapper.ts
+++ b/packages/contracts/test/ts/exchange/wrapper.ts
@@ -133,7 +133,7 @@ contract('Exchange', (accounts: string[]) => {
             });
 
             return expect(exWrapper.fillOrKillOrderAsync(order, taker))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if entire fillTakerTokenAmount not filled', async () => {
@@ -143,7 +143,7 @@ contract('Exchange', (accounts: string[]) => {
             await exWrapper.fillOrderAsync(order, from, {fillTakerTokenAmount: order.params.takerTokenAmount.div(2)});
 
             return expect(exWrapper.fillOrKillOrderAsync(order, taker))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
     });
 
@@ -237,7 +237,7 @@ contract('Exchange', (accounts: string[]) => {
                 await exWrapper.fillOrKillOrderAsync(orders[0], taker);
 
                 return expect(exWrapper.batchFillOrKillOrdersAsync(orders, taker, {fillTakerTokenAmounts}))
-                        .to.be.rejectedWith(constants.INVALID_OPCODE);
+                        .to.be.rejectedWith(constants.REVERT);
             });
         });
 
@@ -302,7 +302,7 @@ contract('Exchange', (accounts: string[]) => {
                 return expect(
                         exWrapper.fillOrdersUpToAsync(
                             orders, taker, {fillTakerTokenAmount: ZeroEx.toBaseUnitAmount(new BigNumber(1000), 18)}),
-                ).to.be.rejectedWith(constants.INVALID_OPCODE);
+                ).to.be.rejectedWith(constants.REVERT);
             });
         });
 
diff --git a/packages/contracts/test/ts/multi_sig_with_time_lock.ts b/packages/contracts/test/ts/multi_sig_with_time_lock.ts
index 6dd4dc3b2..84eb21b4a 100644
--- a/packages/contracts/test/ts/multi_sig_with_time_lock.ts
+++ b/packages/contracts/test/ts/multi_sig_with_time_lock.ts
@@ -44,7 +44,7 @@ contract('MultiSigWalletWithTimeLock', (accounts: string[]) => {
     describe('changeTimeLock', () => {
         it('should throw when not called by wallet', async () => {
             return expect(multiSig.changeTimeLock(SECONDS_TIME_LOCKED, {from: owners[0]}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw without enough confirmations', async () => {
@@ -58,7 +58,7 @@ contract('MultiSigWalletWithTimeLock', (accounts: string[]) => {
             const subRes = await multiSigWrapper.submitTransactionAsync(destination, from, dataParams);
 
             txId = subRes.logs[0].args.transactionId.toNumber();
-            return expect(multiSig.executeTransaction(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeTransaction(txId)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should set confirmation time with enough confirmations', async () => {
@@ -97,7 +97,7 @@ contract('MultiSigWalletWithTimeLock', (accounts: string[]) => {
             const confRes = await multiSig.confirmTransaction(txId, {from: owners[1]});
             expect(confRes.logs).to.have.length(2);
 
-            return expect(multiSig.executeTransaction(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeTransaction(txId)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should execute if it has enough confirmations and is past the time lock', async () => {
diff --git a/packages/contracts/test/ts/multi_sig_with_time_lock_except_remove_auth_addr.ts b/packages/contracts/test/ts/multi_sig_with_time_lock_except_remove_auth_addr.ts
index 97ccac2bd..6f7aaa6cd 100644
--- a/packages/contracts/test/ts/multi_sig_with_time_lock_except_remove_auth_addr.ts
+++ b/packages/contracts/test/ts/multi_sig_with_time_lock_except_remove_auth_addr.ts
@@ -44,7 +44,7 @@ contract('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', (accounts: s
         it('should throw if data is not for removeAuthorizedAddress', async () => {
             const data = MultiSigWrapper.encodeFnArgs('addAuthorizedAddress', PROXY_ABI, [owners[0]]);
             return expect(multiSig.isFunctionRemoveAuthorizedAddress.call(data))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should return true if data is for removeAuthorizedAddress', async () => {
@@ -64,7 +64,7 @@ contract('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', (accounts: s
             const res = await multiSigWrapper.submitTransactionAsync(validDestination, owners[0], dataParams);
             const txId = res.logs[0].args.transactionId.toString();
 
-            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if tx destination is not the tokenTransferProxy', async () => {
@@ -81,7 +81,7 @@ contract('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', (accounts: s
             const isConfirmed = await multiSig.isConfirmed.call(txId);
             expect(isConfirmed).to.be.true();
 
-            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if tx data is not for removeAuthorizedAddress', async () => {
@@ -96,7 +96,7 @@ contract('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', (accounts: s
             const isConfirmed = await multiSig.isConfirmed.call(txId);
             expect(isConfirmed).to.be.true();
 
-            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should execute removeAuthorizedAddress for valid tokenTransferProxy if fully confirmed', async () => {
@@ -131,7 +131,7 @@ contract('MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress', (accounts: s
             const tx = await multiSig.transactions.call(txId);
             const isExecuted = tx[3];
             expect(isExecuted).to.be.true();
-            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(multiSig.executeRemoveAuthorizedAddress(txId)).to.be.rejectedWith(constants.REVERT);
         });
     });
 });
diff --git a/packages/contracts/test/ts/token_registry.ts b/packages/contracts/test/ts/token_registry.ts
index ed0bbf55b..36f3edcfc 100644
--- a/packages/contracts/test/ts/token_registry.ts
+++ b/packages/contracts/test/ts/token_registry.ts
@@ -58,7 +58,7 @@ contract('TokenRegistry', (accounts: string[]) => {
 
     describe('addToken', () => {
         it('should throw when not called by owner', async () => {
-            return expect(tokenRegWrapper.addTokenAsync(token1, notOwner)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(tokenRegWrapper.addTokenAsync(token1, notOwner)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should add token metadata when called by owner', async () => {
@@ -70,11 +70,11 @@ contract('TokenRegistry', (accounts: string[]) => {
         it('should throw if token already exists', async () => {
             await tokenRegWrapper.addTokenAsync(token1, owner);
 
-            return expect(tokenRegWrapper.addTokenAsync(token1, owner)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(tokenRegWrapper.addTokenAsync(token1, owner)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if token address is null', async () => {
-            return expect(tokenRegWrapper.addTokenAsync(nullToken, owner)).to.be.rejectedWith(constants.INVALID_OPCODE);
+            return expect(tokenRegWrapper.addTokenAsync(nullToken, owner)).to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if name already exists', async () => {
@@ -82,7 +82,7 @@ contract('TokenRegistry', (accounts: string[]) => {
             const duplicateNameToken = _.assign({}, token2, {name: token1.name});
 
             return expect(tokenRegWrapper.addTokenAsync(duplicateNameToken, owner))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should throw if symbol already exists', async () => {
@@ -90,7 +90,7 @@ contract('TokenRegistry', (accounts: string[]) => {
             const duplicateSymbolToken = _.assign({}, token2, {symbol: token1.symbol});
 
             return expect(tokenRegWrapper.addTokenAsync(duplicateSymbolToken, owner))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
     });
 
@@ -116,7 +116,7 @@ contract('TokenRegistry', (accounts: string[]) => {
         describe('setTokenName', () => {
             it('should throw when not called by owner', async () => {
                 return expect(tokenReg.setTokenName(token1.address, token2.name, {from: notOwner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should change the token name when called by owner', async () => {
@@ -137,19 +137,19 @@ contract('TokenRegistry', (accounts: string[]) => {
                 await tokenRegWrapper.addTokenAsync(token2, owner);
 
                 return expect(tokenReg.setTokenName(token1.address, token2.name, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should throw if token does not exist', async () => {
                 return expect(tokenReg.setTokenName(nullToken.address, token2.name, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
         });
 
         describe('setTokenSymbol', () => {
             it('should throw when not called by owner', async () => {
                 return expect(tokenReg.setTokenSymbol(token1.address, token2.symbol, {from: notOwner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should change the token symbol when called by owner', async () => {
@@ -170,12 +170,12 @@ contract('TokenRegistry', (accounts: string[]) => {
                 await tokenRegWrapper.addTokenAsync(token2, owner);
 
                 return expect(tokenReg.setTokenSymbol(token1.address, token2.symbol, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should throw if token does not exist', async () => {
                 return expect(tokenReg.setTokenSymbol(nullToken.address, token2.symbol, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
         });
 
@@ -183,7 +183,7 @@ contract('TokenRegistry', (accounts: string[]) => {
             it('should throw if not called by owner', async () => {
                 const index = 0;
                 return expect(tokenReg.removeToken(token1.address, index, {from: notOwner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should remove token metadata when called by owner', async () => {
@@ -197,14 +197,14 @@ contract('TokenRegistry', (accounts: string[]) => {
             it('should throw if token does not exist', async () => {
                 const index = 0;
                 return expect(tokenReg.removeToken(nullToken.address, index, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
             it('should throw if token at given index does not match address', async () => {
                 await tokenRegWrapper.addTokenAsync(token2, owner);
                 const incorrectIndex = 0;
                 return expect(tokenReg.removeToken(token2.address, incorrectIndex, {from: owner}))
-                    .to.be.rejectedWith(constants.INVALID_OPCODE);
+                    .to.be.rejectedWith(constants.REVERT);
             });
 
         });
diff --git a/packages/contracts/test/ts/token_transfer_proxy/auth.ts b/packages/contracts/test/ts/token_transfer_proxy/auth.ts
index 785fbc016..7c0a3d231 100644
--- a/packages/contracts/test/ts/token_transfer_proxy/auth.ts
+++ b/packages/contracts/test/ts/token_transfer_proxy/auth.ts
@@ -23,7 +23,7 @@ contract('TokenTransferProxy', (accounts: string[]) => {
     describe('addAuthorizedAddress', () => {
         it('should throw if not called by owner', async () => {
             return expect(tokenTransferProxy.addAuthorizedAddress(notOwner, {from: notOwner}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should allow owner to add an authorized address', async () => {
@@ -36,14 +36,14 @@ contract('TokenTransferProxy', (accounts: string[]) => {
 
         it('should throw if owner attempts to authorize a duplicate address', async () => {
             return expect(tokenTransferProxy.addAuthorizedAddress(authorized, {from: owner}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
     });
 
     describe('removeAuthorizedAddress', () => {
         it('should throw if not called by owner', async () => {
             return expect(tokenTransferProxy.removeAuthorizedAddress(authorized, {from: notOwner}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should allow owner to remove an authorized address', async () => {
@@ -57,7 +57,7 @@ contract('TokenTransferProxy', (accounts: string[]) => {
 
         it('should throw if owner attempts to remove an address that is not authorized', async () => {
             return expect(tokenTransferProxy.removeAuthorizedAddress(notAuthorized, {from: owner}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
     });
 
diff --git a/packages/contracts/test/ts/token_transfer_proxy/transfer_from.ts b/packages/contracts/test/ts/token_transfer_proxy/transfer_from.ts
index 6e0bfdc1a..8b40bfb1e 100644
--- a/packages/contracts/test/ts/token_transfer_proxy/transfer_from.ts
+++ b/packages/contracts/test/ts/token_transfer_proxy/transfer_from.ts
@@ -46,7 +46,7 @@ contract('TokenTransferProxy', (accounts: string[]) => {
     describe('transferFrom', () => {
         it('should throw when called by an unauthorized address', async () => {
             expect(tokenTransferProxy.transferFrom(rep.address, accounts[0], accounts[1], 1000, {from: notAuthorized}))
-                .to.be.rejectedWith(constants.INVALID_OPCODE);
+                .to.be.rejectedWith(constants.REVERT);
         });
 
         it('should allow an authorized address to transfer', async () => {
diff --git a/packages/contracts/test/ts/unlimitedAllowanceToken.ts b/packages/contracts/test/ts/unlimited_allowance_token.ts
index ca3fcd7d2..33b2a5721 100644
--- a/packages/contracts/test/ts/unlimitedAllowanceToken.ts
+++ b/packages/contracts/test/ts/unlimited_allowance_token.ts
@@ -4,6 +4,7 @@ import * as chai from 'chai';
 import * as Web3 from 'web3';
 
 import {Artifacts} from '../../util/artifacts';
+import {constants} from '../../util/constants';
 import {ContractInstance} from '../../util/types';
 
 import {chaiSetup} from './utils/chai_setup';
@@ -14,7 +15,10 @@ chaiSetup.configure();
 const expect = chai.expect;
 
 contract('UnlimitedAllowanceToken', (accounts: string[]) => {
-    const zeroEx = new ZeroEx(web3.currentProvider);
+    const config = {
+        networkId: constants.TESTRPC_NETWORK_ID,
+    };
+    const zeroEx = new ZeroEx(web3.currentProvider, config);
     const owner = accounts[0];
     const spender = accounts[1];
 
@@ -81,7 +85,9 @@ contract('UnlimitedAllowanceToken', (accounts: string[]) => {
             const amountToTransfer = initOwnerBalance;
             const initSpenderAllowance = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
             await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
-            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
 
             const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
             expect(initSpenderAllowance).to.be.bignumber.equal(newSpenderAllowance);
@@ -92,7 +98,9 @@ contract('UnlimitedAllowanceToken', (accounts: string[]) => {
             const amountToTransfer = initOwnerBalance;
             const initSpenderAllowance = initOwnerBalance;
             await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
-            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
 
             const newOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
             const newSpenderBalance = await zeroEx.token.getBalanceAsync(tokenAddress, spender);
@@ -106,7 +114,9 @@ contract('UnlimitedAllowanceToken', (accounts: string[]) => {
             const amountToTransfer = initOwnerBalance;
             const initSpenderAllowance = initOwnerBalance;
             await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
-            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
 
             const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
             expect(newSpenderAllowance).to.be.bignumber.equal(0);
diff --git a/packages/contracts/test/ts/unlimited_allowance_token_v2.ts b/packages/contracts/test/ts/unlimited_allowance_token_v2.ts
new file mode 100644
index 000000000..4fa06e483
--- /dev/null
+++ b/packages/contracts/test/ts/unlimited_allowance_token_v2.ts
@@ -0,0 +1,132 @@
+import {ZeroEx} from '0x.js';
+import {BigNumber} from 'bignumber.js';
+import * as chai from 'chai';
+import * as Web3 from 'web3';
+
+import {Artifacts} from '../../util/artifacts';
+import {constants} from '../../util/constants';
+import {ContractInstance} from '../../util/types';
+
+import {chaiSetup} from './utils/chai_setup';
+
+const {DummyTokenV2} = new Artifacts(artifacts);
+const web3: Web3 = (global as any).web3;
+chaiSetup.configure();
+const expect = chai.expect;
+
+contract('UnlimitedAllowanceTokenV2', (accounts: string[]) => {
+    const config = {
+        networkId: constants.TESTRPC_NETWORK_ID,
+    };
+    const zeroEx = new ZeroEx(web3.currentProvider, config);
+    const owner = accounts[0];
+    const spender = accounts[1];
+
+    const MAX_MINT_VALUE = new BigNumber(100000000000000000000);
+    let tokenAddress: string;
+    let token: ContractInstance;
+
+    beforeEach(async () => {
+        token = await DummyTokenV2.new({from: owner});
+        await token.mint(MAX_MINT_VALUE, {from: owner});
+        tokenAddress = token.address;
+    });
+
+    describe('transfer', () => {
+        it('should throw if owner has insufficient balance', async () => {
+            const ownerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = ownerBalance.plus(1);
+            return expect(token.transfer.call(spender, amountToTransfer, {from: owner}))
+                .to.be.rejectedWith(constants.REVERT);
+        });
+
+        it('should transfer balance from sender to receiver', async () => {
+            const receiver = spender;
+            const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = new BigNumber(1);
+            await zeroEx.token.transferAsync(tokenAddress, owner, receiver, amountToTransfer);
+            const finalOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const finalReceiverBalance = await zeroEx.token.getBalanceAsync(tokenAddress, receiver);
+
+            const expectedFinalOwnerBalance = initOwnerBalance.minus(amountToTransfer);
+            const expectedFinalReceiverBalance = amountToTransfer;
+            expect(finalOwnerBalance).to.be.bignumber.equal(expectedFinalOwnerBalance);
+            expect(finalReceiverBalance).to.be.bignumber.equal(expectedFinalReceiverBalance);
+        });
+
+        it('should return true on a 0 value transfer', async () => {
+            const didReturnTrue = await token.transfer.call(spender, 0, {from: owner});
+            expect(didReturnTrue).to.be.true();
+        });
+    });
+
+    describe('transferFrom', () => {
+        it('should throw if owner has insufficient balance', async () => {
+            const ownerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = ownerBalance.plus(1);
+            await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, amountToTransfer);
+            return expect(token.transferFrom.call(owner, spender, amountToTransfer, {from: spender}))
+                .to.be.rejectedWith(constants.REVERT);
+        });
+
+        it('should throw if spender has insufficient allowance', async () => {
+            const ownerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = ownerBalance;
+
+            const spenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+            const spenderAllowanceIsInsufficient = spenderAllowance.cmp(amountToTransfer) < 0;
+            expect(spenderAllowanceIsInsufficient).to.be.true();
+
+            return expect(token.transferFrom.call(owner, spender, amountToTransfer, {from: spender}))
+                .to.be.rejectedWith(constants.REVERT);
+        });
+
+        it('should return true on a 0 value transfer', async () => {
+            const amountToTransfer = 0;
+            const didReturnTrue = await token.transferFrom.call(owner, spender, amountToTransfer, {from: spender});
+            expect(didReturnTrue).to.be.true();
+        });
+
+        it('should not modify spender allowance if spender allowance is 2^256 - 1', async () => {
+            const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
+            await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
+
+            const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+            expect(initSpenderAllowance).to.be.bignumber.equal(newSpenderAllowance);
+        });
+
+        it('should transfer the correct balances if spender has sufficient allowance', async () => {
+            const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = initOwnerBalance;
+            await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
+
+            const newOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const newSpenderBalance = await zeroEx.token.getBalanceAsync(tokenAddress, spender);
+
+            expect(newOwnerBalance).to.be.bignumber.equal(0);
+            expect(newSpenderBalance).to.be.bignumber.equal(initOwnerBalance);
+        });
+
+        it('should modify allowance if spender has sufficient allowance less than 2^256 - 1', async () => {
+            const initOwnerBalance = await zeroEx.token.getBalanceAsync(tokenAddress, owner);
+            const amountToTransfer = initOwnerBalance;
+            const initSpenderAllowance = initOwnerBalance;
+            await zeroEx.token.setAllowanceAsync(tokenAddress, owner, spender, initSpenderAllowance);
+            await zeroEx.token.transferFromAsync(tokenAddress, owner, spender, spender, amountToTransfer, {
+                gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS,
+            });
+
+            const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(tokenAddress, owner, spender);
+            expect(newSpenderAllowance).to.be.bignumber.equal(0);
+        });
+    });
+});
diff --git a/packages/contracts/test/ts/zrxToken.ts b/packages/contracts/test/ts/zrx_token.ts
index 471ee93f2..6312056b2 100644
--- a/packages/contracts/test/ts/zrxToken.ts
+++ b/packages/contracts/test/ts/zrx_token.ts
@@ -4,6 +4,7 @@ import * as chai from 'chai';
 import Web3 = require('web3');
 
 import {Artifacts} from '../../util/artifacts';
+import {constants} from '../../util/constants';
 import {ContractInstance} from '../../util/types';
 
 import {chaiSetup} from './utils/chai_setup';
@@ -25,9 +26,10 @@ contract('ZRXToken', (accounts: string[]) => {
 
     beforeEach(async () => {
         zeroEx = new ZeroEx(web3.currentProvider, {
-                exchangeContractAddress: Exchange.address,
+            exchangeContractAddress: Exchange.address,
+            networkId: constants.TESTRPC_NETWORK_ID,
         });
-        zrxAddress = await zeroEx.exchange.getZRXTokenAddressAsync();
+        zrxAddress = zeroEx.exchange.getZRXTokenAddress();
         zrx = await ZRXToken.at(zrxAddress);
         MAX_UINT = zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS;
     });
@@ -92,12 +94,14 @@ contract('ZRXToken', (accounts: string[]) => {
         it('should return false if owner has insufficient balance', async () => {
             const ownerBalance = await zeroEx.token.getBalanceAsync(zrxAddress, owner);
             const amountToTransfer = ownerBalance.plus(1);
-            let txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, amountToTransfer);
+            let txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, amountToTransfer,
+                                                              {gasLimit: constants.MAX_TOKEN_APPROVE_GAS});
             await zeroEx.awaitTransactionMinedAsync(txHash);
             const didReturnTrue = await zrx.transferFrom.call(owner, spender, amountToTransfer, {from: spender});
             expect(didReturnTrue).to.be.false();
             // Reset allowance
-            txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, new BigNumber(0));
+            txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, new BigNumber(0),
+                                                          {gasLimit: constants.MAX_TOKEN_APPROVE_GAS});
             await zeroEx.awaitTransactionMinedAsync(txHash);
         });
 
@@ -125,7 +129,8 @@ contract('ZRXToken', (accounts: string[]) => {
             const initSpenderAllowance = MAX_UINT;
             let txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, initSpenderAllowance);
             await zeroEx.awaitTransactionMinedAsync(txHash);
-            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer);
+            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer,
+                                                          {gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS});
             await zeroEx.awaitTransactionMinedAsync(txHash);
 
             const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(zrxAddress, owner, spender);
@@ -142,7 +147,8 @@ contract('ZRXToken', (accounts: string[]) => {
             const initSpenderAllowance = initOwnerBalance;
             let txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, initSpenderAllowance);
             await zeroEx.awaitTransactionMinedAsync(txHash);
-            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer);
+            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer,
+                                                          {gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS});
             await zeroEx.awaitTransactionMinedAsync(txHash);
 
             const newOwnerBalance = await zeroEx.token.getBalanceAsync(zrxAddress, owner);
@@ -158,7 +164,8 @@ contract('ZRXToken', (accounts: string[]) => {
             const initSpenderAllowance = initOwnerBalance;
             let txHash = await zeroEx.token.setAllowanceAsync(zrxAddress, owner, spender, initSpenderAllowance);
             await zeroEx.awaitTransactionMinedAsync(txHash);
-            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer);
+            txHash = await zeroEx.token.transferFromAsync(zrxAddress, owner, spender, spender, amountToTransfer,
+                                                          {gasLimit: constants.MAX_TOKEN_TRANSFERFROM_GAS});
             await zeroEx.awaitTransactionMinedAsync(txHash);
 
             const newSpenderAllowance = await zeroEx.token.getAllowanceAsync(zrxAddress, owner, spender);
diff --git a/packages/contracts/util/artifacts.ts b/packages/contracts/util/artifacts.ts
index b15c9216f..6b05df78c 100644
--- a/packages/contracts/util/artifacts.ts
+++ b/packages/contracts/util/artifacts.ts
@@ -6,7 +6,9 @@ export class Artifacts {
     public Exchange: any;
     public ZRXToken: any;
     public DummyToken: any;
+    public DummyTokenV2: any;
     public EtherToken: any;
+    public EtherTokenV2: any;
     public MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress: any;
     public MaliciousToken: any;
     constructor(artifacts: any) {
@@ -17,7 +19,9 @@ export class Artifacts {
         this.Exchange = artifacts.require('Exchange');
         this.ZRXToken = artifacts.require('ZRXToken');
         this.DummyToken = artifacts.require('DummyToken');
+        this.DummyTokenV2 = artifacts.require('DummyToken_v2');
         this.EtherToken = artifacts.require('EtherToken');
+        this.EtherTokenV2 = artifacts.require('EtherToken_v2');
         this.MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress = artifacts.require(
                 'MultiSigWalletWithTimeLockExceptRemoveAuthorizedAddress');
         this.MaliciousToken = artifacts.require('MaliciousToken');
diff --git a/packages/contracts/util/constants.ts b/packages/contracts/util/constants.ts
index 5beebc68c..e61b2f802 100644
--- a/packages/contracts/util/constants.ts
+++ b/packages/contracts/util/constants.ts
@@ -1,4 +1,9 @@
 export const constants = {
     NULL_BYTES: '0x',
     INVALID_OPCODE: 'invalid opcode',
+    REVERT: 'revert',
+    TESTRPC_NETWORK_ID: 50,
+    MAX_ETHERTOKEN_WITHDRAW_GAS: 43000,
+    MAX_TOKEN_TRANSFERFROM_GAS: 80000,
+    MAX_TOKEN_APPROVE_GAS: 60000,
 };
diff --git a/packages/subproviders/package.json b/packages/subproviders/package.json
index b0c5686a6..8a222457d 100644
--- a/packages/subproviders/package.json
+++ b/packages/subproviders/package.json
@@ -31,6 +31,7 @@
   },
   "devDependencies": {
     "@0xproject/tslint-config": "^0.2.1",
+    "@0xproject/utils": "^0.1.0",
     "@types/lodash": "^4.14.86",
     "@types/mocha": "^2.2.42",
     "@types/node": "^8.0.53",
diff --git a/yarn.lock b/yarn.lock
index 13b5b211e..d795b1300 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2,13 +2,6 @@
 # yarn lockfile v1
 
 
-"0x-json-schemas@^0.6.1":
-  version "0.6.6"
-  resolved "https://registry.yarnpkg.com/0x-json-schemas/-/0x-json-schemas-0.6.6.tgz#3852e639245474a14daa2f8c454ba83ca5df8a9c"
-  dependencies:
-    jsonschema "^1.2.0"
-    lodash.values "^4.3.0"
-
 "0x.js@0.27.1":
   version "0.27.1"
   resolved "https://registry.yarnpkg.com/0x.js/-/0x.js-0.27.1.tgz#e0dff70e257efbb7f54dddb55dddf2dce0b971ab"
@@ -29,24 +22,6 @@
     uuid "^3.1.0"
     web3 "^0.20.0"
 
-"0x.js@^0.22.6":
-  version "0.22.6"
-  resolved "https://registry.yarnpkg.com/0x.js/-/0x.js-0.22.6.tgz#bc3ff79b6d71f8cf7fae3c78b2c776cfa79c193a"
-  dependencies:
-    "0x-json-schemas" "^0.6.1"
-    bignumber.js "^4.1.0"
-    compare-versions "^3.0.1"
-    es6-promisify "^5.0.0"
-    ethereumjs-abi "^0.6.4"
-    ethereumjs-blockstream "^2.0.6"
-    ethereumjs-util "^5.1.1"
-    find-versions "^2.0.0"
-    js-sha3 "^0.6.1"
-    lodash "^4.17.4"
-    publish-release "^1.3.3"
-    uuid "^3.1.0"
-    web3 "^0.20.0"
-
 "@0xproject/assert@^0.0.6":
   version "0.0.6"
   resolved "https://registry.yarnpkg.com/@0xproject/assert/-/assert-0.0.6.tgz#773616620314f40ace11a9c4c65cc95398d2c178"
@@ -112,10 +87,6 @@
   version "4.6.2"
   resolved "https://registry.yarnpkg.com/@types/history/-/history-4.6.2.tgz#12cfaba693ba20f114ed5765467ff25fdf67ddb0"
 
-"@types/isomorphic-fetch@^0.0.34":
-  version "0.0.34"
-  resolved "https://registry.yarnpkg.com/@types/isomorphic-fetch/-/isomorphic-fetch-0.0.34.tgz#3c3483e606c041378438e951464f00e4e60706d6"
-
 "@types/jsonschema@^1.1.1":
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/@types/jsonschema/-/jsonschema-1.1.1.tgz#08703dfe074010e8e829123111594af731f57b1a"
@@ -1287,7 +1258,7 @@ big.js@^3.1.3:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/big.js/-/big.js-3.2.0.tgz#a5fc298b81b9e0dca2e458824784b65c52ba588e"
 
-bignumber.js@^4.0.2, bignumber.js@^4.1.0, bignumber.js@~4.1.0:
+bignumber.js@^4.0.2, bignumber.js@~4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/bignumber.js/-/bignumber.js-4.1.0.tgz#db6f14067c140bd46624815a7916c92d9b6c24b1"
 
@@ -2662,10 +2633,14 @@ diff@3.2.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.2.0.tgz#c9ce393a4b7cbd0b058a725c93df299027868ff9"
 
-diff@3.3.1, diff@^3.1.0, diff@^3.2.0:
+diff@3.3.1, diff@^3.2.0:
   version "3.3.1"
   resolved "https://registry.yarnpkg.com/diff/-/diff-3.3.1.tgz#aa8567a6eed03c531fc89d3f711cd0e5259dec75"
 
+diff@^3.1.0:
+  version "3.4.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-3.4.0.tgz#b1d85507daf3964828de54b37d0d73ba67dda56c"
+
 diffie-hellman@^5.0.0:
   version "5.0.2"
   resolved "https://registry.yarnpkg.com/diffie-hellman/-/diffie-hellman-5.0.2.tgz#b5835739270cfe26acf632099fded2a07f209e5e"
@@ -5076,8 +5051,8 @@ lolex@^1.6.0:
   resolved "https://registry.yarnpkg.com/lolex/-/lolex-1.6.0.tgz#3a9a0283452a47d7439e72731b9e07d7386e49f6"
 
 lolex@^2.2.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/lolex/-/lolex-2.3.0.tgz#d6bad0f0aa5caebffcfebb09fb2caa89baaff51c"
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/lolex/-/lolex-2.3.1.tgz#3d2319894471ea0950ef64692ead2a5318cff362"
 
 longest@^1.0.1:
   version "1.0.1"
@@ -6472,7 +6447,7 @@ public-encrypt@^4.0.0:
     parse-asn1 "^5.0.0"
     randombytes "^2.0.1"
 
-publish-release@0xproject/publish-release, publish-release@^1.3.3:
+publish-release@0xproject/publish-release:
   version "1.3.3"
   resolved "https://codeload.github.com/0xproject/publish-release/tar.gz/c67c546726deecabd0cb35f9873afc912f862bd3"
   dependencies:
@@ -7585,17 +7560,7 @@ sockjs@0.3.18:
     faye-websocket "^0.10.0"
     uuid "^2.0.2"
 
-solc@0.4.11:
-  version "0.4.11"
-  resolved "https://registry.yarnpkg.com/solc/-/solc-0.4.11.tgz#2522eb43e7c0419bac2060b96e20a2593bfb5e8b"
-  dependencies:
-    fs-extra "^0.30.0"
-    memorystream "^0.3.1"
-    require-from-string "^1.1.0"
-    semver "^5.3.0"
-    yargs "^4.7.1"
-
-solc@^0.4.18, solc@^0.4.2:
+solc@0.4.18, solc@^0.4.18, solc@^0.4.2:
   version "0.4.18"
   resolved "https://registry.yarnpkg.com/solc/-/solc-0.4.18.tgz#83ac6d871dd16a9710e67dbb76dad7f614100702"
   dependencies:
@@ -8289,13 +8254,13 @@ truffle-hdwallet-provider@^0.0.3:
     web3 "^0.18.2"
     web3-provider-engine "^8.4.0"
 
-truffle@3.4.3:
-  version "3.4.3"
-  resolved "https://registry.yarnpkg.com/truffle/-/truffle-3.4.3.tgz#6d9ea4abea758b452b2d3769669eb7109146229e"
+truffle@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/truffle/-/truffle-4.0.1.tgz#d8661a4ad7a6ca094b7517d29b199c60e6dde665"
   dependencies:
     mocha "^3.4.2"
     original-require "^1.0.1"
-    solc "0.4.11"
+    solc "0.4.18"
 
 tslib@^1.7.1:
   version "1.8.0"