Harmony Will Delete Nearly a Week of Its Own Chain History

Harmony has begun a full network rollback that will erase billions of illegally minted ONE tokens from the chain’s history. The plan resets the blockchain to its state on August 11, hours before an attacker forged a fresh supply. Validators are already preparing the restart.

Why the Harmony Rollback Goes Back to August 11 Harmony (ONE) confirmed the recovery plan in a post on X. The chain will resume from blocks stamped 23:25 UTC on August 11. Everything after that point disappears. The first forged mint landed two blocks later.

Therefore, the team picked an earlier checkpoint as a safety buffer. Independent validators are now loading clean replacement databases for both shards, and the chain stays paused until that work ends. Developers will give the go-ahead signal once the preparations finish.

The exploit pushed ONE to a record low last week after roughly 4 billion tokens appeared without authorization, swelling supply by about 26%. The Harmony team weighed softer fixes first.