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Diffstat (limited to 'packages/contracts/src/contracts/current/protocol/AssetProxy/proxies/ERC721Proxy.sol')
-rw-r--r-- | packages/contracts/src/contracts/current/protocol/AssetProxy/proxies/ERC721Proxy.sol | 58 |
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); + } +} |