当前NFT Metadata设计思路因为NFT合约本身只有一个ID，无法承载更多信息，因此ERC-721引入了Metadata的概念，以供每个NFT描述自身的属性，/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension /// @dev See https://eips.ethereum.org/EIPS/eip-721 /// Note: the ERC-165 identifier for this interface is 0x5b5e139f. interface ERC721Metadata /* is ERC721 */ { /// @notice A descriptive name for a collection of NFTs in this contract function name() external view returns (string _name); /// @notice An abbreviated name for NFTs in this c...