IERC721Receiver

Interface for any contract that wants to support safeTransfers from ERC-721 asset contracts.

onERC721Received

function onERC721Received(address operator, address from, uint256 tokenId, bytes data) external returns (bytes4)

_Whenever an {IERC721} tokenId token is transferred to this contract via {IERC721-safeTransferFrom} by operator from from, this function is called.

It must return its Solidity selector to confirm the token transfer. If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.

The selector can be obtained in Solidity with IERC721Receiver.onERC721Received.selector._