✨ Multinuteral payments – Pay a single Lightning invoice from Ecash balances on multiple Cashu mints.

We use Lightning multi-path payments (MPP) to achieve atomicity.

This has wild implications for UX and privacy and is a significant breakthrough for Cashu.

Most Cashu wallets have multiple small ecash balances across mints to minimize the custodial risk.

Paying a large LN invoice, however, was a pain. Amounts larger than any of your ecash balances required a multi-mint swap first (swap ecash across mints via LN).

Not anymore!

Instead of one big LN payment, wallets could send multiple small ones from a dozen different mints all running their own LN node.

Either all payments succeed, or all fail. The mints don't communicate with each other. Receiver doesn't notice anything.

Imagine the beauty of this.

This eliminates the need for inter-mint coin control almost entirely. Wallets could show the user one unified balance across all mints and handle it all hidden away from the user.

You simply scan an invoice and an orchestra of Ecash mints and Lightning nodes begin their play.

This is yet another cool example of how ecash can significantly improve the safety and security of custodial Lightning wallets.

The deep integration of Cashu with Lightning makes this possible. And we have more ideas.