Sample Hardhat Project

This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a Hardhat Ignition module that deploys that contract.

Try running some of the following tasks:

npx hardhat help
npx hardhat test
REPORT_GAS=true npx hardhat test
npx hardhat node
npx hardhat ignition deploy ./ignition/modules/Lock.js

firstnft

1. 主要思路

支付不少于一定数量的USDC或ETH，随机锁定一段时间，在解锁时免费mint一个NFT。若提前解锁，返还50%费用+按已锁定时间线性解锁的剩余部分

2. 用到的知识

• hardhat
• ERC20
• mapping、array、struct等类型
• modifier修饰符
• event
• ERC721
• random
• require等权限控制
• payable
• safeTransfer
• gas report