NFT mint functionality, where _mint operation uses Verifiable Random Function (VRF) from Chainlink. Note that this application use Vertion2.

How does Chainlink VRF Version2 work?

Deploy your smart contract
Create subscription
Fund your subscription. In the example, I funded with 2 LINK.
Add a consumer of your subscription, which is the address of the contract you deployed.
Request randomness, wait for the fallback call.
fallback call triggers _mint operation.

How to run?

This version is configured to run on Rinkeby test net. Assuming you have .env file with the private key of your account:

brownie run scripts/create_and_deploy.py --network rinkeby