ERC 721 Holder Upgradeable

Implementation of the {IERC721Receiver} interface. Accepts all token transfers. Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.

Methods

onERC721Received

function onERC721Received(address, address, uint256, bytes) external nonpayable returns (bytes4)

See {IERC721Receiver-onERC721Received}. Always returns IERC721Receiver.onERC721Received.selector.

Parameters

Name	Type	Description
_0	address	undefined
_1	address	undefined
_2	uint256	undefined
_3	bytes	undefined

Returns

Name	Type	Description
_0	bytes4	undefined