1. A Basic NFT
2. IPFS Hosted NFT
   1. That uses Randomness to generate a unique NFT
3. SVG NFT (Hosted 100% on-chain)
   1. Uses price feeds to be dynamic

• BasicNft - 0x41Ac0A6ca3AEd9F04EA04DD1A31D5E77328eF65d
• DynamicSvgNft - 0xf53Bc92aadd748296Cf2b5c5AD33B447d2930e6D
• RandomIpfsNft - 0x9a360514C7FA30C23a4ab84bBC004Be12E3f869d

• git
• Nodejs
• Yarn instead of npm

git clone https://github.com/Nedick/hardhat-nft.git
cd hardhat-nft
yarn

Deploy:

yarn hardhat deploy

yarn hardhat test

yarn hardhat coverage

1. Setup environment variabltes

You'll want to set your RINKEBY_RPC_URL and PRIVATE_KEY as environment variables.

• 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.
• RINKEBY_RPC_URL: This is url of the rinkeby 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 & LINK. You should see the ETH and LINK show up in your metamask. You can read more on setting up your wallet with LINK.

3. Setup a Chainlink VRF Subscription ID

Head over to vrf.chain.link and setup a new subscription, and get a subscriptionId. You can reuse an old subscription if you already have one.

You can follow the instructions if you get lost. You should leave this step with:

1. A subscription ID

2. Your subscription should be funded with LINK

3. Deploy

In your helper-hardhat-config.js add your subscriptionId under the section of the chainId you're using (aka, if you're deploying to rinkeby, add your subscriptionId in the subscriptionId field under the 4 section.)

Then run:

yarn hardhat deploy --network rinkeby --tags main

We only deploy the main tags, since we need to add our RandomIpfsNft contract as a consumer.

4. Add your contract address as a Chainlink VRF Consumer

Go back to vrf.chain.link and under your subscription add Add consumer and add your contract address. You should also fund the contract with a minimum of 1 LINK.

5. Mint NFTs

Then run:

yarn hardhat deploy --network rinkeby --tags mint

To get a USD estimation of gas cost, you'll need a COINMARKETCAP_API_KEY environment variable. You can get one for free from CoinMarketCap.

Then, uncomment the line coinmarketcap: COINMARKETCAP_API_KEY, in hardhat.config.js and set REPORT_GAS environment variable to get the USD estimation. Just note, everytime you run your tests it will use an API call, so it might make sense to have using coinmarketcap disabled until you need it. You can disable it by just commenting the line back out.

If you deploy to a testnet or mainnet, you can verify it if you get an API Key from Etherscan and set it as an environemnt variable named ETHERSCAN_API_KEY. You can pop it into your .env file.

In it's current state, if you have your api key set, it will auto verify rinkeby contracts!

However, you can manual verify with:

yarn hardhat verify --constructor-args arguments.ts DEPLOYED_CONTRACT_ADDRESS

To check linting / code formatting:

yarn lint

or, to fix:

yarn lint:fix