hard20 pts · first answer countssecurityoraclesdefi

Lending protocol price oracle

A lending protocol values collateral using the current reserve ratio of a single DEX pool. Why is this dangerous?

A.Reading pool reserves costs too much gasB.An attacker can use a flash loan to move the pool price within one transaction, borrow against inflated collateral and repay the loanC.DEX pools cannot be read by other contractsD.Reserve ratios are always exactly 1

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