Files
2023-06-23 16:45:27 +03:00

25 lines
1.1 KiB
Solidity

// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity 0.8.17;
/// @dev Note: the ERC-165 identifier for this interface is 0x150b7a02.
interface IERC721TokenReceiver {
/// @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 calldata _data
) external returns (bytes4);
}