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Can profit from GasRefunder gas refund with 0 bytes padding #2310

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gzeoneth opened this issue Jun 21, 2022 · 0 comments
Open

Can profit from GasRefunder gas refund with 0 bytes padding #2310

gzeoneth opened this issue Jun 21, 2022 · 0 comments

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@gzeoneth
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It is possible to profit from GasRefunder gas refund by padding the calldata with 0 bytes at the end if calldataCost is less than 16.

https://github.com/OffchainLabs/arbitrum/blob/3a13334f1be625e52686e2689fa6def4910652dc/packages/arb-bridge-eth/contracts/validator/GasRefunder.sol#L84
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@gzeoneth