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author | Amir Bandeali <abandeali1@gmail.com> | 2018-07-27 07:19:10 +0800 |
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committer | Amir Bandeali <abandeali1@gmail.com> | 2018-08-17 08:31:21 +0800 |
commit | 0f3201d72a181c3dc7bafba9a82c141f91463ce9 (patch) | |
tree | 16e1c151b08b874a66eeed63f40cd044825445df /packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol | |
parent | 8131a87046e129f6f5a8978e6133fb21abd8db42 (diff) | |
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Optimize ERC721Token
Diffstat (limited to 'packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol')
-rw-r--r-- | packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol | 81 |
1 files changed, 32 insertions, 49 deletions
diff --git a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol index f2e8f3c88..8e0e32ab2 100644 --- a/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol +++ b/packages/contracts/src/2.0.0/tokens/ERC721Token/IERC721Receiver.sol @@ -1,61 +1,44 @@ /* -The MIT License (MIT) - -Copyright (c) 2016 Smart Contract Solutions, Inc. - -Permission is hereby granted, free of charge, to any person obtaining -a copy of this software and associated documentation files (the -"Software"), to deal in the Software without restriction, including -without limitation the rights to use, copy, modify, merge, publish, -distribute, sublicense, and/or sell copies of the Software, and to -permit persons to whom the Software is furnished to do so, subject to -the following conditions: - -The above copyright notice and this permission notice shall be included -in all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS -OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF -MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. -IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY -CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, -TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE -SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + + 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 0.4.24; -/** - * @title ERC721 token receiver interface - * @dev Interface for any contract that wants to support safeTransfers - * rom ERC721 asset contracts. - * Modified from https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/token/ERC721/ERC721Receiver.sol - */ contract IERC721Receiver { - /** - * @dev Magic value to be returned upon successful reception of an NFT - * Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`, - * which can be also obtained as `ERC721Receiver(0).onERC721Received.selector` - */ - bytes4 constant internal ERC721_RECEIVED = 0xf0b9e5ba; - - /** - * @notice Handle the receipt of an NFT - * @dev The ERC721 smart contract calls this function on the recipient - * after a `safetransfer`. This function MAY throw to revert and reject the - * transfer. This function MUST use 50,000 gas or less. Return of other - * than the magic value MUST result in the transaction being reverted. - * Note: the contract address is always the message sender. - * @param _from The sending address - * @param _tokenId The NFT identifier which is being transfered - * @param _data Additional data with no specified format - * @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))` - */ + + /// @notice Handle the receipt of an NFT + /// @dev The ERC721 smart contract calls this function on the recipient + /// after a `transfer`. This function MAY throw to revert and reject the + /// transfer. Return of other than the magic value MUST result in the + /// transaction being reverted. + /// Note: the contract address is always the message sender. + /// @param _operator The address which called `safeTransferFrom` function + /// @param _from The address which previously owned the token + /// @param _tokenId The NFT identifier which is being transferred + /// @param _data Additional data with no specified format + /// @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` + /// unless throwing function onERC721Received( + address _operator, address _from, uint256 _tokenId, - bytes _data) - public + bytes _data + ) + external returns (bytes4); } |