SuperDynamicNFT Chainlink example

Reference link: How To Create a Dynamic NFT Using 3 Chainlink Services [<1 Hour]

The link above demonstrates a dynamic NFT to simulate watching the price of ETH. The NFT will change depending on if the value is higher or lower. The smart contract uses a subscription to the Chainlink Verifiable Randomness Function where it receives a random value to simulate the price of ETH. Chainlink Automation is then used to update the NFT to reflect a different image (background colour and emoticon) based on the value.

The steps below describe how to deploy the NFT using this code base. To integrate with the Chainlink VRF function follow the reference link above (Steps 5-7).

Prerequisites

• A metamask account with exportable private key
• Matic for blockchain transactions - https://mumbaifaucet.com/
• LINK for automation - https://faucets.chain.link/mumbai

Initial setup and deployment

Install dependencies:

yarn install

Important: You need a Chainlink subscriptionId before deploying the smart contracts (see Step 3: Create a VRF Subscription)

Create .env file and add the following values:

MUMBAI_RPC="<<Your Mumbai RPC link - Available in Metamask>>"
PRIVATE_KEY="<<The private key of the account to use for deployment>>"
CHAINLINK_SUBSCRIPTIONID="<<Chainlink subscriptionId>>"

Compile the contracts:

yarn compile

Deploy to local

Run local node first:

yarn hardhat node

Deploy:

yarn hardhat run scripts/deploy.ts --network localhost

Deploy to mumbai

yarn hardhat run scripts/deploy.ts --network mumbai