Merge pull request #877 from 0xProject/feature/contracts/removeERC721Callback

Removed receiverData and `onReceive` callback from ERC721 proxy.

2 files changed, 3 insertions, 5 deletions

diff --git a/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
index eadeaf5ba..cb0ed5422 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinForwarderCore.sol
@@ -40,7 +40,7 @@ contract MixinForwarderCore is
     MForwarderCore
 {
     bytes4 constant internal ERC20_DATA_ID = bytes4(keccak256("ERC20Token(address)"));
-    bytes4 constant internal ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256,bytes)"));
+    bytes4 constant internal ERC721_DATA_ID = bytes4(keccak256("ERC721Token(address,uint256)"));
     uint256 constant internal MAX_UINT = 2**256 - 1;
 
     constructor ()
diff --git a/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
index 6c49330f2..bebfc976b 100644
--- a/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
+++ b/packages/contracts/src/2.0.0/forwarder/MixinTransfer.sol
@@ -109,12 +109,10 @@ contract MixinTransfer is
         // Decode asset data.
         address token = assetData.readAddress(16);
         uint256 tokenId = assetData.readUint256(36);
-        bytes memory receiverData = assetData.readBytesWithLength(100);
-        IERC721Token(token).safeTransferFrom(
+        IERC721Token(token).transferFrom(
             address(this),
             to,
-            tokenId,
-            receiverData
+            tokenId
         );
     }
 }