Simple Storage Hardhat Project

Requirment

Install requirment

.git   
.node   
.yarn   

clone the repository

git clone https://github.com/zafiqul/hardhat-simple-storage

Change Directory
cd hardhat-simple-storage
Install dependency

yarn
yarn hardhat

Deploy

yarn hardhat run scripts/deploy.js

Testing

npx hardhat test

Test Coverage

npx hardhat coverage

Estimate gas

You can estimate how much gas things cost by running:

npx hardhat test

And you'll see and output file called gas-report.txt

Local Deployment

If you'd like to run your own local hardhat network, you can run:

npx hardhat node

And then in a different terminal

npx hardhat run scripts/deploy.js --network localhost

And you should see transactions happen in your terminal that is running npx hardhat node

Important localhost note

If you use metamask with a local network, everytime you shut down your node, you'll need to reset your account. Settings -> Advanced -> Reset account. Don't do this with a metamask you have real funds in. And maybe don't do this if you're a little confused by this.

Deployment to a testnet or mainnet

1. Setup environment variables

You'll want to set your SEPOLIA_RPC_URL and PRIVATE_KEY as environment variables. You can add them to a .env file, similar to what you see in .env.example.

• PRIVATE_KEY: The private key of your account (like from metamask). NOTE: FOR DEVELOPMENT, PLEASE USE A KEY THAT DOESN'T HAVE ANY REAL FUNDS ASSOCIATED WITH IT.
  • You can learn how to export it here.
• SEPOLIA_RPC_URL: This is url of the sepolia testnet node you're working with. You can get setup with one for free from Alchemy

2. Get testnet ETH

Head over to faucets.chain.link and get some tesnet ETH. You should see the ETH show up in your metamask.

3. Deploy

npx hardhat run scripts/deploy.js --network sepolia