Advanced Sample Hardhat Project

This project demonstrates an advanced Hardhat use case, integrating other tools commonly used alongside Hardhat in the ecosystem.

The project 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. It also comes with a variety of other tools, preconfigured to work with the project code.

Try running some of the following tasks:

yarn hardhat accounts
yarn hardhat compile
yarn hardhat clean
yarn hardhat node
yarn hardhat help
yarn hardhat block-number --network rinkeby
REPORT_GAS=true yarn hardhat test
yarn hardhat run scripts/deploy.js
node scripts/deploy.js
yarn coverage
yarn test
yarn format
yarn lint
yarn lint:fix

Etherscan verification

To try out Etherscan verification, you first need to deploy a contract to an Ethereum network that's supported by Etherscan, such as Goerli.

In this project, copy the .env.example file to a file named .env, and then edit it to fill in the details. Enter your Etherscan API key, your Goerli node URL (eg from Alchemy), and the private key of the account which will send the deployment transaction. With a valid .env file in place, first deploy your contract:

yarn hardhat run --network goerli scripts/run.js

Then, copy the deployment address and paste it in to replace DEPLOYED_CONTRACT_ADDRESS in this command:

yarn hardhat verify --network goerli DEPLOYED_CONTRACT_ADDRESS "Hello, Hardhat!"