#鐵人賽 #ethereum #solidity

本日課程將 ERC721 的函式與事件都過一次，從明天開始就要正式來寫合約啦！

本日影片： https://youtu.be/7TwXDigV1BQ
本日合約：

interface IERC721 {
    // Event
    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);
    // Query
    function balanceOf(address owner) external view returns (uint256 balance);
    function ownerOf(uint256 tokenId) external view returns (address owner);
    // Transfer
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
    function safeTransferFrom(address from, address to, uint256 tokenId) external;
    function transferFrom(address from, address to, uint256 tokenId) external;
    // Approve
    function approve(address to, uint256 tokenId) external;
    function setApprovalForAll(address operator, bool _approved) external;
    function getApproved(uint256 tokenId) external view returns (address operator);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

本影片提到的連結：
「Remix IDE」： https://remix.ethereum.org/
「在 2022 年，我們該如何寫智能合約」： https://ithelp.ithome.com.tw/users/20083367/ironman/5019
「那些關於 Ethereum 的事」： https://ithelp.ithome.com.tw/users/20083367/ironman/5136
「一本關於 Ethereum 與 Solidity 智能合約的書」： https://solidity.tw
「文章或主題許願池」： https://github.com/hydai/solidity-book/issues
「本系列播放清單」： https://www.youtube.com/playlist?list=PLHmOMPRfmOxQYDnXAc1hKY6ra4WDU8ZlM