Do you think it could make sense to have these transaction details as a nostr note? Like an NIP for Encrypted invoices. That way, the transaction data could be multi-device (and potentially multi user)? Would hate for the computer to break and lose all the data. Or is there another way to achieve that?

Hey 👋 Yup we are planning a multi-device sync feature that will use a nostr relay. If you have other feature requests just give us a shout 👍