nips/15750.md

NIP-15750

Nostr Coinjoin Discovery

draft author:kukks

Introduction

The BTCPay Server Coinjoin plugin offers a coinjoin endpoint discovery feature over Nostr for a coordinator runner and a coinjoin client to easily discover each other.

Specification

This NIP introduces a NIP16 replaceable kind 15750, with the following tags:

• type: Signals what kind of coinjoin protocol is being provided. In the case of the BTCPay Server coinjoin plugin, this is wabisabi. Other possible options could be whirlpool, bip78, joinmarket, etc.
• network: Signals the bitcoin network the coinjoin protocol is operating on. Always lowercase, can be mainnet,testnet, signet, regtest.
• endpoint: A URI of where a user may connect to interact with the coinjoin.

The content of the event COULD be used to describe the coinjoin endpoint, such as fees, round parameters, etc.

As a client, you SHOULD check that the event was created within the last 15 minutes, to ensure that the coinjoin endpoint is still active. As a coinjoin endpoint provider, you SHOULD update the event every 15 minutes to signal you are still online.