Liquid Network Hack: $320 Million In Bitcoin Walked Out, And The Hacker Wants To Give It Back

Bitcoin's oldest sidechain just lost almost everything it was holding, and the person who took it is asking politely how to give it back.

On Saturday, 6 September 2026, roughly 4,000 $BTC worth about $320 million left the federation wallet that backs Liquid Network, the Blockstream-built Bitcoin sidechain that has been running since 2018. The wallet held around 4,200 BTC before the incident. It now holds a little over 200. That is about 95% of every Bitcoin ever pegged into Liquid, gone in the space of 23 minutes.

Then things got strange. The attacker attached a message to a Bitcoin transaction announcing himself as a white hat and inviting Blockstream to get in touch. Blockstream did. The two sides have spent the weekend negotiating a $320 million return in public, one small Bitcoin transaction at a time.

What Actually Happened In The Liquid Network Hack?

The timeline is unusually clean, because most of it is on the Bitcoin blockchain.

At 14:05 UTC on 6 September, a customer sent 4,000 L-BTC to SideSwap's peg-out service. SideSwap is a Liquid Federation member and a normal, approved route for converting L-BTC back into real Bitcoin. It processed the order like any other: the L-BTC was burned on Liquid, a valid peg-out authorisation was attached, and 23 minutes later the federation paid out roughly 3,996 BTC on the Bitcoin mainchain.

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