Sample Hardhat Project

This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a script 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 run scripts/deploy.js

Setup instructions

mkdir epic-game
cd epic-game
npm init -y
npm install --save-dev hardhat@latest

npx hardhat

Choose the option Create a JavaScript project. Say yes to everything.

Go ahead and install these other dependencies just in case it didn't do it automatically.

npm install --save-dev chai @nomiclabs/hardhat-ethers ethers @nomicfoundation/hardhat-toolbox @nomicfoundation/hardhat-chai-matchers

You'll also want to install something called OpenZeppelin which is another library that's used a lot to develop secure smart contracts. We'll learn more about it later. For now, just install it :).

npm install @openzeppelin/contracts

Then run:

npx hardhat run scripts/deploy.js

Characters

Characters created with Midjourney.

dotenv

https://www.npmjs.com/package/dotenv

.env file format:

QUICKNODE_API="YOUR_API_KEY_HERE"
PRIVATE_KEY="YOUR_PRIVATE_KEY_HERE"

IMPORTANT: Add .env to your .gitignore file!!

To be safe, use a fresh metamask account with no real-world assets.

For Ethereum network node, use Quicknode, Infura, or Alchemy etc.

For Scroll Network L1 (Pre-alpha), use: https://prealpha-rpc.scroll.io/l1.

Deploying on Goerli testnet

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

Deploying on Hardhat testnet - will show console.log

npx hardhat run scripts/run.js

Web App

npm install

npm run start

If new smart contract deployed, do this!

So, what you'll need to do is:

1. Deploy again using npx hardhat run scripts/deploy.js --network goerli

2. Change contractAddress in constants.js to be the new contract address we got from the step above in the terminal (just like we did before the first time we deployed).

3. Get the updated abi file from artifacts and copy-paste it into your web app just like we did above.

Verify on Etherscan

• https://hardhat.org/hardhat-runner/plugins/nomiclabs-hardhat-etherscan

1. Install

npm install --save-dev @nomiclabs/hardhat-etherscan

2. Add to hardhat.config.js:

require("@nomiclabs/hardhat-etherscan");

...

networks: {
    ...
},
etherscan: {
    apiKey: "YOUR_ETHERSCAN_API_KEY"
}

3. Create arguments.js for complex arguments.

4. Verify

npx hardhat verify --network goerli --constructor-args ./scripts/arguments.js 0xc9c56698d2Fd5eC0a684E177b1aE4EAD690b3AA0

PUSH TO PRODUCTION

1. Update network in ./client/src/App.js.

2. Update url to minted nft in ./client/src/SelectCharacter/index.js.

3. Use correct account key in .env

4. To deploy, run npx hardhat run scripts/deploy.js --network scrollAlpha.

5. Update ABI file copy from ./artifacts/contracts/VanillaRaiders.sol/VanillaRaiders.json to ./client/src/utils/VanillaRaiders.json.

6. Update Contract address to ./client/src/constants.js.

7. To verify, run npx hardhat verify --network scrollAlpha --constructor-args ./scripts/arguments.js 0x2514158C3752a4e06641Ac4DaC5ff492Bcfb2B73.