Flash loans often come up in postmortems of attacks. What exactly are they?
Flash loans let users borrow and repay within a single transaction, without collateral.
When evaluating a protocol, pay attention to where its prices come from: protocols that rely only on the spot price of a single DEX pool are vulnerable to flash loan attacks.
The lending protocol Aave, associated with $AAVE , offers flash loans. Current price: 159.94.
If anything is unclear, ask me in the comments.