Flash Loans in DeFi
Decentralized Finance (DeFi) has revolutionized traditional finance by introducing novel financial instruments, one of the most controversial being flash loans. Unlike conventional loans, flash loans require no collateral and allow users to borrow funds instantly—provided they repay the loan within a single blockchain transaction. This innovation has unlocked new opportunities in arbitrage, liquidations, and refinancing. However, it has also introduced significant security risks, particularly in the form of flash loan attacks. In this article, we delve into the mechanics, applications, benefits, and risks of flash loans in DeFi. What Are Flash Loans? Flash loans are a unique financial primitive in DeFi, primarily facilitated by lending protocols such as Aave and dYdX. They leverage smart contracts to enable users to borrow funds without collateral, under the condition that the borrowed amount is repaid within the same transaction block. If the repayment condition is not met, the trans...