Joinstr: Coinjoin pools using MuSig2 and pre-signed transactions.

Joinstr presents a novel implementation for Coinjoin operations within the Bitcoin ecosystem, focusing on enhancing transaction privacy and fungibility. The system leverages advanced cryptographic techniques, specifically MuSig2, a sophisticated multi-signature scheme that allows for compact and efficient transaction constructions. Furthermore, Joinstr incorporates the use of pre-signed transactions, which can streamline the coordination process for Coinjoin pools and potentially offer greater flexibility and security guarantees for participants. This approach aims to provide a more robust and scalable solution for achieving improved on-chain privacy for Bitcoin users by making transaction inputs and outputs harder to link through collaborative mixing.