A place for talking about the Ethereum Virtual Machine on Farcaster.

Can you use the getProof rpc to prove things about L1 on L2? Need trusted L1 blockhash?

Should be able to with the L1 hash that lives in the L1Block contract on optimism, I think arbitrum has something similar

Security at Optimism. Formerly built Umbra and more at ScopeLift

hmm gp but can I just use any block hash? 🤔

Assuming op stack, pretty sure you'd need to submit the proof to L2 while the L1 block in it's storage matches the one the proof uses. That hash lags ~5 L1 blocks behind 

Will be more flexible after https://github.com/ethereum-optimism/optimism/pull/6903

Also related

Assuming op stack, pretty sure you'd need to submit the proof to L2 while the L1 block in it's storage matches the one the proof uses. That hash lags ~5 L1 blocks behind 

Will be more flexible after https://github.com/ethereum-optimism/optimism/pull/6903

Also related https://github.com/mds1/evm-diff/issues/21