Ravencoin faces potential four-day transaction rollback after critical blockchain flaw

Ravencoin, a proof-of-work cryptocurrency, is facing a significant network disruption after a critical invalid block was produced on Friday. Two dominant mining pools, which together control the majority of the network's hashpower, are now constructing an alternative chain from before the faulty block appeared. This effort could effectively erase up to four days of transaction history on the network. As a result, deposits, withdrawals, and payments processed since Friday are at risk of being reversed. The incident highlights ongoing vulnerabilities in blockchain networks when a small number of mining entities hold outsized control over hashpower.