Cronos, a Layer 1 blockchain built on the Cosmos SDK and backed by Crypto.com, said on Monday morning that its network is producing blocks again, and that validators restored the chain's state to a point before the exploit that drained the Tectonic lending protocol on Sunday.
Rewinding a live chain undoes settled transactions for everyone who used it, not only the attacker. Cronos has not said what happens to the trades, transfers and liquidations other users made inside the window it discarded, and it has not addressed the roughly $6.29 million the attacker had already moved to Ethereum, where a Cronos rollback has no effect.
"The Cronos Network is producing blocks again and is fully back online," the chain’s official X account wrote at 9:31 a.m. ET. "This was a validator-consensus emergency action to protect users from an exploit on the Tectonic protocol. The chain state was restored to before the Tectonic exploit from this morning."
The post said block production resumed at 23:49:01 UTC on Aug. 30, starting from block 90,896,189, and told node operators to restart on Cronos v1.7.8 using mainnet snapshots taken at 09:52:00 UTC on Monday. A full postmortem will follow, it said.
That resume timestamp sits nearly 13 hours before Cronos's own post at 8:43 a.m. ET Monday, 22 hours after the chain stopped, saying "We're still halted. Since the last update we've been working through the restart sequence with validators and security teams."
