Alpen says AI identified Liquids $320M BTC exploit in an hour. Could a payout limit have stopped it?
On September 6, 2026, Liquids federation released roughly 3,996 BTC after its network accepted L-BTC that lacked Bitcoin backing. Liquid is a Bitcoin sidechain whose L-BTC is meant to represent bitcoin held in a federation reserve. A validly authorized withdrawal turned the invalid sidechain state into a real Bitcoin payment worth about $320 million at the time. A payout limit before federation signing might have interrupted that exit. Related Asset Bitcoin #1 BTC · $83,509.77 24-hour change: down 2.27% Loading price history… 24H Down 2.27% 7D Up 8.76% 30D Up 5.66% Alpen Labs CEO Simanta Gautam now says his AI agents traced the flaw and reproduced it locally in about an hour. The work began after he heard of the September 6 attack. His September 22 account and technical report give a detailed explanation of the failed proof check. The demonstration came after the funds left, so its speed says little by itself about whether a standing AI monitor would have raised an actionable warning before the attack. Elements, the software underlying Liquid, caches successful checks of the cryptographic proofs attached to confidential transactions. A September 1 code change tried to make each cached result depend on all the context that affects verification,









