validation: verify eth-da via latest batcher tx #421
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sebastianst
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Description
Use the updated
op-service/ethpackagesCheckRecentTxsto perform a binary search to find the most recent batcher tx. If the tx exists within the lastChainConfig.SequencerWindowSizeblocks on mainnet, then the chain passes the test foreth-da. Only checkingeth-dafor now.Additional context
Follow-up work will be to detect and verify
alt-da, as described in #406Metadata
Closes #400