TL;DR
- Rollback: Harmony will revert its chain to Aug. 11, discarding over 109,000 transactions after forged ONE tokens appeared.
- Investigation: The protocol traced nearly all unauthorized tokens and is coordinating with exchanges, bridges, and law enforcement.
- Context: The protocol’s move mirrors Ravencoin’s reorganization attempt, showing how networks respond when exploits threaten ledger integrity.
Harmony is preparing a full chain rollback to Aug. 11 after investigators confirmed that forged ONE tokens were minted and circulated, forcing the network to discard more than 109,000 previously confirmed transactions. The decision marks one of the most significant reversions attempted by the protocol, reflecting the severity of the exploit and the risks posed to its ledger integrity.
— Harmony 💙 (@harmonyprotocol) August 17, 2026
Rollback Decision and Scope of Discarded Activity
Harmony said validators will revert the chain to blocks recorded at 11:25 pm UTC on Aug. 11, rebuilding the network from that checkpoint using replacement databases. The rollback window includes 109,126 regular transactions and 315 staking transactions, all of which will be removed from the chain’s history.
According to Harmony, selectively restoring transactions was deemed unsafe because balances, contract states, nonces, and other conditions would no longer match on the rebuilt chain. The network had already been weighing a rollback last week after early reports indicated unauthorized ONE tokens were minted and sent to exchanges.
Harmony emphasized that investigators have traced nearly all forged tokens to wallets or service boundaries. The team is coordinating with exchanges, bridges, and law enforcement as part of the containment effort. At the time of the latest update, the ONE token carried a market cap of roughly $10.8 million and traded at $0.0007209, down nearly 7%.
Comparisons to Ravencoin’s Reorganization Effort
Harmony’s rollback places it alongside Ravencoin, another network that recently faced the prospect of reversing confirmed blockchain activity after an exploit. Ravencoin encountered a consensus flaw that allowed attackers to manipulate the chain, prompting mining pools controlling most of its hash rate to build a competing version capable of undoing transactions.
Ravencoin’s recent price of $0.002819 reflected a market cap of $46.3 million, underscoring the scale of the incident. While the circumstances differ, Harmony’s move highlights how some networks are willing to consider drastic measures when ledger integrity is compromised.
Harmony maintains that the rollback is necessary to restore accurate chain state and prevent long‑term damage from the forged token exploit. As validators prepare the reset, Harmony continues working with partners to ensure the rebuilt chain launches cleanly and securely.
