is it possible to develop a nostr bot where everyone can send a psbt, the bot take all psbts and then broadcast a transaction with n input and n output.
it make sense?
ca be good for btc privacy?
can be called coinjoin?
Discussion
The signatures wouldn't be valid once you added an extra input or output.
There is a project joinstr that does coinjoins over nostr, last i looked at it it was vulnerable to ddos attacks tho.
right, thank you
It is possible using `joinpsbts` RPC in bitcoin core.
As #[2]mentioned I am already working on a coinjoin implementation, however still a work in progress. It uses `combinepsbt` RPC though because inputs and outputs for a round are known after 2 phases: https://gitlab.com/1440000bytes/joinstr
TIL joinpsbts. I’ve always wanted to build a psbt combiner/joiner widget is damus somehow. Like pasting psbts in DMs automatically combines psbts. Would be more useful in private group chats.
Check out Coinstr: https://youtu.be/FyyMz259AZY