IERC 721 Receiver Upgradeable

ERC721 token receiver interface

Interface for any contract that wants to support safeTransfers from ERC721 asset contracts.

Methods

onERC721Received

function onERC721Received(address operator, address from, uint256 tokenId, bytes data) external nonpayable 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 IERC721.onERC721Received.selector.

Parameters

Name	Type	Description
operator	address	undefined
from	address	undefined
tokenId	uint256	undefined
data	bytes	undefined

Returns

Name	Type	Description
_0	bytes4	undefined