This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, a sample script that deploys that contract, and an example of a task implementation, which simply lists the available accounts.
Try running some of the following tasks:
npx hardhat accounts
npx hardhat compile
npx hardhat clean
npx hardhat test
npx hardhat node
node scripts/sample-script.js
npx hardhat help参考自：https://github.com/GGCCCC/airdrop_multi_claim
链上记录：http://rinkeby.etherscan.io/tx/0x343a4e09f91acb5b8178471cfa7f7295765ad135f43acdd2d6e1896f4c3ed222