- For ETH/USD we have a priceFeed address that works on Sepolia chain
- But everytime we cannot test on the fork-url
- Instead we need some setup for local testing
- To test this locally we can deploy a mock contract to anvil chain which gives the price of ETH/USD
- We use helper config inside the scripts to deploy mocks when working with local chain
- Mock contract is already present in the chainlink-brownie-library
- We can deploy this mock and get the priceFeed address