ERC721 interface

pragma solidity ^0.6.2;

import "../../introspection/IERC165.sol";


interface IERC721 is IERC165 {

    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);


    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);


    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    
    function balanceOf(address owner) external view returns (uint256 balance);

    function ownerOf(uint256 tokenId) external view returns (address owner);

    function safeTransferFrom(address from, address to, uint256 tokenId) external;


    function transferFrom(address from, address to, uint256 tokenId) external;

 
    function approve(address to, uint256 tokenId) external;

  
    function getApproved(uint256 tokenId) external view returns (address operator);

    function setApprovalForAll(address operator, bool _approved) external;

   
    function isApprovedForAll(address owner, address operator) external view returns (bool);

  
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}