You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
25 lines
1.2 KiB
25 lines
1.2 KiB
pragma solidity ^0.5.0;
|
|
|
|
/**
|
|
* @title ERC721 token receiver interface
|
|
* @dev Interface for any contract that wants to support safeTransfers
|
|
* from ERC721 asset contracts.
|
|
*/
|
|
contract IERC721Receiver {
|
|
/**
|
|
* @notice Handle the receipt of an NFT
|
|
* @dev The ERC721 smart contract calls this function on the recipient
|
|
* after a {IERC721-safeTransferFrom}. This function MUST return the function selector,
|
|
* otherwise the caller will revert the transaction. The selector to be
|
|
* returned can be obtained as `this.onERC721Received.selector`. This
|
|
* function MAY throw to revert and reject the transfer.
|
|
* Note: the ERC721 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 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
|
|
*/
|
|
function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data)
|
|
public returns (bytes4);
|
|
}
|
|
|