zeeplin

Official docs: https://docs.openzeppelin.com/contracts/5.x Configuration wizard: https://wizard.openzeppelin.com/

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

Transparent upgradeable contracts boxv1 boxv2
npx hardhat run .\test\BoxV2.js --network localhost

In 5v1 Owner Roles

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

Usage of Some OpenZeppelin Libraries

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";