hard20 pts · first answer countssmart-contract-securityevm-fundamentals

Return data gas griefing

A relayer contract does (bool ok, bytes memory data) = target.call{gas: 100_000}(payload) and then records the result. Calls to some targets make the whole relayer transaction run out of gas. Why?

A.The target returns a huge byte array, and copying it into memory after the call costs the caller enormous gas, even though the callee gas was cappedB.call cannot set a gas limitC.The bool return value is too largeD.The target self-destructs, which costs extra gas

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