According to Coindesk, a Twitter user by the name “Burak” (@brqgoo) sent a large swath of the Lightning Network into turmoil on Tuesday morning, when he allegedly created a non-standard Bitcoin transaction that prevented users from opening new Lightning channels (connections between Lightning nodes). Burak’s valid but non-standard transaction caused Bitcoin nodes running an implementation of Bitcoin called btcd, to suddenly stop creating new transaction blocks. This caused a corresponding glitch on all Lightning Network Daemon (LND) nodes. LND nodes rely on information from btcd Bitcoin nodes, and the glitch caused LND nodes to reject all new channel opening requests. Burak’s shenanigans disrupted a good chunk of the Bitcoin and Lightning ecosystems. Core Lightning (CLN) nodes that rely on Bitcoin Core, the most popular implementation of Bitcoin, were unaffected (although this seems to have been by design). Additionally, the bug Burak exploited was quickly patched.