Ravencoin developers said Tuesday that the blockchain faces a potential rollback of several days of transactions following a critical consensus flaw. Attackers exploited the vulnerability, which allowed invalid blocks to enter the chain. The network's native token, RVN, dropped 22 percent from its 24-hour high as uncertainty spread.
The exploit began Aug. 7 at block height 4,487,776. A flaw in the network's consensus rules permitted compromised nodes to treat fraudulent blocks as legitimate additions to the chain, allowing blocks that should have failed validation to pass.
Two major mining pools, 2Miners and RavenMiner, have initiated a chain rebuild. The two pools collectively control a majority of Ravencoin's hash power and are mining a chain that excludes the exploited branch, starting from before the first identified bad block.
Should the rebuilt chain gain sufficient traction and become canonical, Ravencoin will undergo a deep reorganization erasing roughly three days of transactions. Developers advised users and exchanges to treat all transactions executed after the exploit as at risk.
RVN trading volume rose sharply as holders reacted to uncertainty over transaction finality and the network recovery process.
Upbit and Bitget both halted RVN transfers in response to the network instability—a standard precaution during potential rollbacks.
The consensus flaw allowed certain nodes to deviate from established block validation rules, letting an attacker introduce illegitimate data into the chain. The recovery depends on 2Miners and RavenMiner outpacing any continued mining on the compromised branch; their combined hash power is critical to re-establishing a valid chain.
All users who conducted transfers, trades or asset issuances on Ravencoin during the affected period face the risk of those transactions being undone. Ravencoin developers have not specified a timeline for resolution.
