1 files changed, 58 insertions, 0 deletions
diff --git a/packages/contracts/src/contracts/current/protocol/AssetProxy/proxies/ERC721Proxy.sol b/packages/contracts/src/contracts/current/protocol/AssetProxy/proxies/ERC721Proxy.sol
new file mode 100644
index 000000000..466d0b871
--- /dev/null
+++ b/packages/contracts/src/contracts/current/protocol/AssetProxy/proxies/ERC721Proxy.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;
+
+import "../IAssetProxy.sol";
+import "../../../utils/LibBytes/LibBytes.sol";
+import "../../../utils/Authorizable/Authorizable.sol";
+import "zeppelin-solidity/contracts/token/ERC721/ERC721Token.sol";
+
+contract ERC721Proxy is
+    LibBytes,
+    Authorizable,
+    IAssetProxy
+{
+
+    /// @dev Transfers ERC721 tokens. Either succeeds or throws.
+    /// @param assetMetadata ERC721-encoded byte array
+    /// @param from Address to transfer token from.
+    /// @param to Address to transfer token to.
+    /// @param amount Amount of token to transfer.
+    function transferFrom(
+        bytes assetMetadata,
+        address from,
+        address to,
+        uint256 amount)
+        external
+        onlyAuthorized
+    {
+        // There exists only 1 of each token.
+        require(amount == 1);
+
+        // Decode metadata
+        require(assetMetadata.length == 53);
+        address token = readAddress(assetMetadata, 1);
+        uint256 tokenId = readUint256(assetMetadata, 21);
+
+        // Either succeeds or throws.
+        // @TODO: Call safeTransferFrom if there is additional
+        //        data stored in `assetMetadata`.
+        ERC721Token(token).transferFrom(from, to, tokenId);
+    }
+}