Base Network Double Downtime Post-Mortem: How a Sequencer Bug Triggered Critical Layer 2 Failures

Coinbase's Layer 2 network Base suffered two outages within 26 hours due to a critical software bug in its Sequencer's block-building logic. The root cause involved incorrect handling of temporary state after failed transactions, compounded by a race condition during recovery. Downtimes lasted 116 and 20 minutes, prompting commitments to enhanced fuzz testing and network resilience.

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