Introducing the next chapter of Bitcoin Thunderbolt, our fast, secure, asynchronous off-chain payment protocol for Bitcoin.

Today, we are open-sourcing Bitcoin Thunderbolt, and the research behind it has been accepted at ACM CCS 2026, a top-tier academic conference in security and cryptography.

More than a decade after Lightning, Bitcoin Thunderbolt brings asynchronous payments to Bitcoin, without routing or liquidity rebalancing, even when the recipient is offline.

A Bitcoin UTXO can pass from one owner to the next, repeatedly and entirely off-chain.

https://x.com/nubit_org/status/2091262297281081719