contract 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);

   /**
    * @dev Returns the number of NFTs in `owner`'s account.
    */
   function balanceOf(address owner) public view returns (uint256 balance);

   /**
    * @dev Returns the owner of the NFT specified by `tokenId`.
    */
   function ownerOf(uint256 tokenId) public view returns (address owner);

   /**
    * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
    * another (`to`).
    *
    *
    *
    * Requirements:
    * - `from`, `to` cannot be zero.
    * - `tokenId` must be owned by `from`.
    * - If the caller is not `from`, it must be have been allowed to move this
    * NFT by either {approve} or {setApprovalForAll}.
    */
   function safeTransferFrom(address from, address to, uint256 tokenId) public;
   /**
    * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
    * another (`to`).
    *
    * Requirements:
    * - If the caller is not `from`, it must be approved to move this NFT by
    * either {approve} or {setApprovalForAll}.
    */
   function transferFrom(address from, address to, uint256 tokenId) public;
   function approve(address to, uint256 tokenId) public;
   function getApproved(uint256 tokenId) public view returns (address operator);

   function setApprovalForAll(address operator, bool _approved) public;
   function isApprovedForAll(address owner, address operator) public view returns (bool);


   function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public;
}
/**
 * @dev Required interface of an ERC721 compliant contract.
 */
function transferFrom(address from, address to, uint256 tokenId) public;

/**
 * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
 * another (`to`).
 *
 * Requirements:
 * - If the caller is not `from`, it must be approved to move this NFT by
 * either {approve} or {setApprovalForAll}.
 */