区块链合约代码

区块链合约怎么赚钱的

```solidity// SPDXLicenseIdentifier: MITpragma solidity ^0.8.0;import "@openzeppelin/contracts/token/ERC721/ERC721.sol";import "@openzeppelin/contracts/access/Ownable.sol";import "@openzeppelin/contracts/utils/Counters.sol";contract BlindBox is ERC721, Ownable...