On this pageMockERC721 Git Source Inherits: IERC721Metadata This is a mock contract of the ERC721 standard for testing purposes only, it SHOULD NOT be used in production. Forked from: https://github.com/transmissions11/solmate/blob/0384dbaaa4fcb5715738a9254a7c0a4cb62cf458/src/tokens/ERC721.sol State Variables _name string internal _name; _symbol string internal _symbol; _ownerOf mapping(uint256 => address) internal _ownerOf; _balanceOf mapping(address => uint256) internal _balanceOf; _getApproved mapping(uint256 => address) internal _getApproved; _isApprovedForAll mapping(address => mapping(address => bool)) internal _isApprovedForAll; initialized A bool to track whether the contract has been initialized. bool private initialized; Functions name function name() external view override returns (string memory); symbol function symbol() external view override returns (string memory); tokenURI function tokenURI(uint256 id) public view virtual override returns (string memory); ownerOf function ownerOf(uint256 id) public view virtual override returns (address owner); balanceOf function balanceOf(address owner) public view virtual override returns (uint256); getApproved function getApproved(uint256 id) public view virtual override returns (address); isApprovedForAll function isApprovedForAll(address owner, address operator) public view virtual override returns (bool); initialize To hide constructor warnings across solc versions due to different constructor visibility requirements and syntaxes, we add an initialization function that can be called only once. function initialize(string memory name_, string memory symbol_) public; approve function approve(address spender, uint256 id) public payable virtual override; setApprovalForAll function setApprovalForAll(address operator, bool approved) public virtual override; transferFrom function transferFrom(address from, address to, uint256 id) public payable virtual override; safeTransferFrom function safeTransferFrom(address from, address to, uint256 id) public payable virtual override; safeTransferFrom function safeTransferFrom(address from, address to, uint256 id, bytes memory data) public payable virtual override; supportsInterface function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool); _mint function _mint(address to, uint256 id) internal virtual; _burn function _burn(uint256 id) internal virtual; _safeMint function _safeMint(address to, uint256 id) internal virtual; _safeMint function _safeMint(address to, uint256 id, bytes memory data) internal virtual; _isContract function _isContract(address _addr) private view returns (bool);