zeeplin

官方文档：https://docs.openzeppelin.com/contracts/5.x 配置向导：https://wizard.openzeppelin.com/

npm instal --save-dev @openzeppelin/hardhat-upgrades

透明升级合约 boxv1 boxv2
npx hardhat run .\test\BoxV2.js --network localhost

5v1里 Owner Roles

npm instal --save-dev @openzeppelin/contracts-upgradeable
npm install @openzeppelin/contracts-upgradeable @openzeppelin/contracts

openzeeplin 的一些库的用法

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import "@openzeppelin/contracts/utils/Context.sol";