hard20 pts · first answer countsdefismart-contract-security

Checking a Chainlink price

A lending protocol on an L2 reads (, int256 answer, , , ) = feed.latestRoundData() and uses answer directly. Which checks are missing?

A.None; Chainlink prices are always freshB.Only a check that answer is below type(int256).maxC.A check that the feed address is not a contractD.That answer is positive, that updatedAt is within the feed's heartbeat, and on L2s that the sequencer uptime feed shows the sequencer is up and past its grace period

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