Harmony Confirms 4B ONE Mint as Attack Total Reaches 3.01T

Key Point

Harmony Protocol said an attacker exploited repeated verification of cross-shard receipts on August 12 to mint ONE tokens in empty blocks. Harmony's latest on-chain reconstruction shows that approximately 3.01 trillion ONE were issued to four attacker wallets through six forged cross-shard transactions. Harmony confirmed that the first round minted 4 billion ONE through two empty block records. Harmony said 2.8 billion ONE from the first round were later transferred to other attacker addresses. Harmony patched the vulnerabilities, suspended bridge services, paused Shard 0, and is preparing to roll back the network to block 92,730,034.

Why it matters: The rollback and fund-freezing process may determine whether the unauthorized supply reaches wider trading venues and affects network operations.

Market Sentiment

Bearish, Stress-on, Tech-driven, Volatile.

Reason: The unauthorized issuance of approximately 3.01 trillion ONE creates immediate uncertainty over token supply and network integrity.

Similar Past Cases

In October 2022, BNB Chain paused after a cross-chain bridge exploit enabled the creation of about $570 million in BNB. The attacker accessed about $100 million, and BNB fell from $293.10 to $280.40 before the chain resumed operations. (CoinDesk) Difference: Harmony is preparing a rollback, while BNB Chain resumed operations after its pause.

Ripple Effect

The bridge suspension may restrict transfers between Harmony and other networks while the protocol contains the forged tokens. If Harmony completes the rollback, network participants may need to verify balances and transactions under the revised chain history.

Opportunities & Risks

Opportunities: If Harmony completes the rollback and reopens bridge services after verification, then use resumed network operations as a confirmation signal that containment is progressing.

Risks: If fund freezes or the rollback are delayed, then reducing exposure to ONE can limit risk from unresolved supply and settlement uncertainty.