Harmony Announces Rollback Plan: Will Roll Back to August 11, 23:25:37 UTC, Subsequent Blocks and Transactions Will Be Discarded

BlockBeats News, August 17th, Harmony Protocol announced the rollback plan for the unusual issuance event of ONE. The plan is to rollback Shard 0 to block 92,730,034 and Shard 1 to block 94,978,278. The timestamps for both blocks are August 11, 2026, 23:25:37 UTC. Validators will use the replacement database for the respective blocks, and blocks will be replayed starting from heights 92,730,035 and 94,978,279.

Harmony stated that the first confirmed fraudulent issuance occurred in block 92,730,036 of Shard 0, hence the selection of the previous block as a secure buffer. After evaluating solutions such as targeted burn, blacklisting, selective transaction replay, token migration, and direct database rollback, the team concluded that these solutions could impact unrelated funds or lead to chain inconsistency. Therefore, they ultimately chose a fixed rollback window. Harmony disclosed that a wallet involved in the fraudulent issuance attempted to transfer 534 transactions of 50 billion ONE each within 106 seconds, out of which 477 were successful, transferring a total of 23.85 trillion ONE. The team mentioned that the fund tracking has covered over 99.9% of the fraudulent ONE path but tracing back to a wallet or cluster does not imply confirmation of specific individual identity or guarantee of safe destruction of related funds.

Additionally, Harmony has completed a full archive of Shard 0 from block 92,730,035 to 92,871,662, involving 141,628 consecutive blocks, 109,126 regular transactions, and 315 staking transactions. The team stated that all blocks and regular transactions after the rollback checkpoint will be discarded. They are currently collaborating with exchanges, cross-chain bridges, and law enforcement agencies to assess the impact and develop solutions. An independent third-party security firm has reviewed the incident, confirming the discovery of fraudulent issuance and the main fund flow. Validators are required to follow the official recovery process to execute the rollback.