When you perform a flashloan in Aave v2, the asset and amount parameters take an array of values. By inputting multiple assets and amounts this is how you perform a batch flashloan. In Aave v3 you can perform batch flashloans the same way, or there’s also a separate function called `flashLoanSimple() `which takes a single asset and amount; More [info](https://aave.peeranha.io/feed).