Overview
- Sui’s mainnet stalled for roughly six hours on Jan. 14, halting checkpoint certification and transaction processing before validators restored normal operations the same day.
- The foundation says a commit‑logic bug caused validators to compute conflicting checkpoint candidates, triggering a designed safety halt to avoid inconsistent finalized state.
- Sui reports no certified forks or rollbacks and confirms user funds were not at risk, with read requests continuing to serve the last certified state during the pause.
- Recovery steps included purging incorrect consensus data, canarying a fix on Mysten validators, replaying the affected consensus history, and upgrading the validator set to resume certification.
- Sui plans faster detection of checkpoint inconsistencies, more automated operator tooling, and expanded consensus testing; more than $1 billion in on-chain value was temporarily inactive, while the SUI token saw limited volatility.