Sybil resistance

[1440000bytes]

Joinstr protocol uses curve trees for sybil resistance. It involves proving ownership of a taproot unspent output of certain amount, age etc. This is different from fidelity bonds used in joinmarket that require locking bitcoin. However, it increases the cost of sybil attack.

Waxwing has created a rust library which makes it easier to implement:

https://github.com/AdamISZ/aut-ct?tab=readme-ov-file#worked-example

Users will need to submit these proofs for joining a pool while sending a join request.

[kayabaNerve]

From the caveat,

Everything here is completely experimental and not safe in any way.

I will note there is an audited implementation of Generalized Bulletproofs available. The Bitcoin-specific scheme would have to be redefined but it should be eligible for production use. https://github.com/kayabaNerve/fcmp-plus-plus/tree/develop/crypto/generalized-bulletproofs