TLDR Tech / Crypto
Base's Two-Hour Outage Exposes Single-Sequencer Risk
Base experienced a nearly two-hour outage on June 25 after a consensus bug sequenced one invalid block following block 47806542, halting all subsequent block production. The network's single-sequencer design meant no backup producer or validator set could route around the failure, and recovery required manual restarts by node operators across the ecosystem rather than any automated self-healing. During the outage, DeFi users had no access to trades, liquidations, or withdrawals since all exit actions require transactions. This marks Base's second significant sequencer failure after a 33-minute handoff freeze in August 2025, reinforcing the argument that single-sequencer L2s carry the operational risk profile of a centralized server regardless of the underlying chain's architecture.
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