// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 *      from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an ERC721 token is transferred to this contract via
     *      safeTransferFrom, this function is called.
     *
     * @param operator  The address of the operator.
     * @param from      The address of the sender.
     * @param tokenId   The ID of the ERC721.
     * @param data      Additional data.
     *
     * @return bytes4 The magic value, unless throwing.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}