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Following
ONE Harmony plans to roll back blockchain to eliminate the impact of the attack
Harmony has released a detailed rollback plan to restore the blockchain to its pre-attack state, thereby eliminating the impact of hackers forging billions of ONE tokens. This move will discard all transactions confirmed by the network since the incident, and while removing fraudulent data, it will also delete users 'legal operation records.
What measures will Harmony take on blockchain?
Harmony Networks announced that it will reverse its blockchain status to August 11, 2026, 23:25:37 (UTC time). All transactions that occur thereafter-including fake ONE tokens created by hackers, as well as any legal purchases, sales, and transfers made by users during this period-will be cleared. The company chose this time point because the first fake token appeared in the next block of fragment 0 (block number 92,730,036). The immediately preceding block 92,730,034 (fragment 1) has never been attacked, but will also be rolled back synchronously to prevent possible future problems. After that, the network will regenerate new blocks starting from block heights of 92,730,035 and 94,978,279. Harmony's new client software v2026.1.2 will refuse to accept block hashes related to attacks.
Before the team decided to adopt a fixed rollback window, it considered targeted destruction of fake tokens as an initial solution. However, because fake ONE tokens have been sent to exchanges, liquidity pools and smart contracts, the destruction operation may accidentally injure innocent users 'funds. The company also rejected the blacklist plan because it would leave false supplies and selective replay transactions were considered "unfeasible"-because the state of the chain had changed. The plan to fully reset tokens was also abandoned on the grounds that it caused too much interference to all users. In addition, simply using the built-in rollback tool to move the chain head has also been warned that it is not advisable to leave behind useless data and cause new failures.
Harmony Networks reported that an independent security agency reviewed the attack and approved a rollback plan.
How did the attack happen?
The attack was originally discovered by chain expert "Juiceberg". He estimated that attackers exploited a vulnerability in the network's cross-fragment receipt verification mechanism to repeatedly process the same receipt, creating tokens out of thin air. After the attack was exposed, the price of the ONE token fell and is currently around $0.0007. About 4 billion ONEs (approximately 26% of the total token supply) are created out of thin air through empty blocks. Harmony said it was investigating the flow of funds. The hacker tried to send 534 transactions in 106 seconds, each transferring 5 billion tokens. Among them, 477 transactions were successful, and a total of 2,385,000,000,000 ONE pieces were transferred. After tracking the flow of funds, the team found that most of the fake tokens ended up flowing into a wallet or reaching service platforms such as exchanges. Harmony said it is working with exchanges, cross-chain bridges and law enforcement to maintain records and track down criminals.
