As Salaamu Alaykum
https://medium.com/furucombo/create-flashloan-combo-on-furucombo-c7c3b23267f0
Essentially, flashloans let users borrow any amount up to the total liquidity available without any collateral, so long as the loan is repaid in the same transaction. If the loan is not repaid, the whole transaction will be reverted. With flashloan anyone can access a massive amount of liquidity, and use the loan with other protocols however they want. You can become a ‘whale’ without any capital.
Is the principle here haram?