Cronos validators erase transaction history to contain massive $75 million lending protocol exploit

Cronos has restarted and restored block production after validators restored the chain to its state before the Tectonic exploit, replacing an open-ended network halt with a monitored restart. In an Aug. 31 update, Cronos said the restarted chain was producing blocks from block 90,896,189, with a timestamp of 23:49:01 UTC on Aug. 30.The network said it was fully back online, but added that some protocols, RPC providers, explorers and bridges could take longer to recover. Cronos also said it was monitoring the chain for stability and would publish a full postmortem. Those details superseded a 05:24 UTC update on Aug. 31 that said the network remained halted while the investigation continued.Cronos had announced the halt on Aug. 30 after identifying an exploit at Tectonic, a decentralized lending protocol on the chain. The response made the wider blockchain, rather than only Tectonic, unavailable while validators and security teams assessed the incident.Tectonic separately acknowledged an incident and told users not to interact with the protocol until it confirmed that doing so was safe.How the Tectonic exploit unfoldedOnchain researcher Weilin Li attributed the exploit to manipulatio...