MockV3Aggregator is a contract or PriceFeedAddress?

[TimeKeyRoll]

Another stupid question --

If we are deploying MockV3Aggregator on 00-deploy-mocks as a contract.
then how come on 01-deploy its ethUSDAggregator?

 const ethUSDAggregator = await deployments.get("MockV3Aggregator")

So MockV3Aggregator is a contract of priceFeedAddress ?

[othaime-en]

Thats just a variable name we assign to get the contract instance. In this section, we are more concerned about the address of this contract so we use this variable to get the contract instance so we can eventually get the address of where the mock contract was deployed. You could call ethUSDAggregator whatever you like provided you get the address.

[TimeKeyRoll]

Whops! As I understand 'MockV3Aggregator' is a contract address of 'price feed' ... Yeah!?

BTW what does this contract does other than getting deployed in 00-deploy?

[othaime-en]

Yes. MockV3Aggregator is the contract that has the priceFeed function, i.e. it has a functionality that gives us the pricefeed.
so we use 00-deploy to deploy this MockV3Aggregator as a mock/copy of the real contract called AggregatorV3Interface which is a data feed by chainlink that helps us get the real price of ETH in terms of USD. This MockV3Aggregator contract that we deploy locally using 00-deploy mimicks this functionality to give us the price of ETH in USD