2e0713becb
* rename ERC20 to IERC20 * move ERC20.sol to IERC20.sol * rename StandardToken to ERC20 * rename StandardTokenMock to ERC20Mock * move StandardToken.sol to ERC20.sol, likewise test and mock files * rename MintableToken to ERC20Mintable * move MintableToken.sol to ERC20Mintable.sol, likewise test and mock files * rename BurnableToken to ERC20Burnable * move BurnableToken.sol to ERC20Burnable.sol, likewise for related files * rename CappedToken to ERC20Capped * move CappedToken.sol to ERC20Capped.sol, likewise for related files * rename PausableToken to ERC20Pausable * move PausableToken.sol to ERC20Pausable.sol, likewise for related files * rename DetailedERC20 to ERC20Detailed * move DetailedERC20.sol to ERC20Detailed.sol, likewise for related files * rename ERC721 to IERC721, and likewise for other related interfaces * move ERC721.sol to IERC721.sol, likewise for other 721 interfaces * rename ERC721Token to ERC721 * move ERC721Token.sol to ERC721.sol, likewise for related files * rename ERC721BasicToken to ERC721Basic * move ERC721BasicToken.sol to ERC721Basic.sol, likewise for related files * rename ERC721PausableToken to ERC721Pausable * move ERC721PausableToken.sol to ERC721Pausable.sol * rename ERC165 to IERC165 * move ERC165.sol to IERC165.sol * amend comment that ERC20 is based on FirstBlood * fix comments mentioning IERC721Receiver
39 lines
1.4 KiB
Solidity
39 lines
1.4 KiB
Solidity
pragma solidity ^0.4.24;
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/**
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* @title ERC721 token receiver interface
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* @dev Interface for any contract that wants to support safeTransfers
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* from ERC721 asset contracts.
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*/
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contract IERC721Receiver {
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/**
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* @dev Magic value to be returned upon successful reception of an NFT
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* Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`,
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* which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
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*/
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bytes4 internal constant ERC721_RECEIVED = 0x150b7a02;
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/**
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* @notice Handle the receipt of an NFT
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* @dev The ERC721 smart contract calls this function on the recipient
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* after a `safetransfer`. This function MAY throw to revert and reject the
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* transfer. Return of other than the magic value MUST result in the
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* transaction being reverted.
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* Note: the contract address is always the message sender.
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* @param _operator The address which called `safeTransferFrom` function
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* @param _from The address which previously owned the token
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* @param _tokenId The NFT identifier which is being transferred
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* @param _data Additional data with no specified format
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* @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
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*/
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function onERC721Received(
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address _operator,
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address _from,
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uint256 _tokenId,
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bytes _data
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)
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public
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returns(bytes4);
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}
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