Starknet Team Outlines Root Cause of Latest Network Outage
Starknet detailed that a state discrepancy between its execution and proving layers caused a recent temporary mainnet outage.Summary
The Starknet team released a post-mortem report detailing the root cause of a recent temporary mainnet downtime, which was the second major disruption in 2025. The issue stemmed from a state discrepancy between the blockifier execution layer and the proving layer. Specifically, a bug in a specific combination of cross-function calls, variable writes, reverts, and catching them caused the blockifier to remember a state-writing from a reverted function, leading to incorrect transaction execution. The proving layer correctly flagged this error, preventing faulty transactions from reaching L1 finality. The incident necessitated a block reorganization, reverting 18 minutes of network activity. The team committed to enhanced testing and code audits to prevent future occurrences. This outage follows a more severe five-hour disruption in September, also in 2025, caused by a sequencer bug following the Grinta protocol upgrade, which required two chain reorganizations and rolled back about one hour of activity.
(Source：Cointelegraph)