Subnostr

I have been trying to build a coinjoin implementation using nostr since last year alone and got some help from BOB recently.

- cli ✅

- web (localhost with bitcoin node)✅

- electrum plugin (almost done)

It was previously maintained on GitHub.

https://gitlab.com/1440000bytes/joinstr

steepdawn974 2y ago

Interesting! Couple of questions:

- No fees for coordinator, right?

- No fixed pool sizes? theoretically one could CJ any utxo as long as I find takers (which will be highly unlikely for non-standard amounts.. but thats a diff topic)?

- Can you configure how many peers you want in your mix, or is it fixed to 5?

- Where would ppl discover CJ peers? I guess ppl would register their utxo to a well known Nostr relay, and the client would periodically poll if there are others?

- No fees/No fidelity bonds -> easy to sybil attack?

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Discussion

steepdawn974 2y ago

What's Nostr kind=892? Is this a public message, or encrypted DM?

The way I see it: Nostr data is forever. Like nude pics on the internet.

Yes, there is is NIP-9 Delete request events, but each relay operator is in full control of his database and you have to trust that they actually obey the Delete request, and not keep logs or backups.

Would be better for the whole mix/coordination to be truly ephemeral imho..

/dev/fd0 2y ago

It's random number used for testing.

Yes NIP 9 does not guarantee events are deleted although encrypted channels will be helpful. I have not implemented them yet.

/dev/fd0 2y ago

- No fees for coordination apart from transaction fees which goes to miners

- Yes

- Not possible right now but I can make it configurable

- Yes users can also use multiple relays. Once the process is initiated, joinstr client keeps looking for events regularly and moves to next step when enough participants register UTXO

- Paid relays and encrypted channels will reduce lot of attacks. There are a few other ways which can be experimented once it's ready for mainnet.