I know how to make a very cool alternative to Nostr zaps using Cashu but before we can tackle that, we need to add some more crypto magic to the protocol which we're already working on.

Requirements:

- Tokens that everyone can verify the signature of (DLEQ proofs).

- Tokens that can be locked to a specific recipient (P2SH/P2PK).

Receiver can remain offline, sender can pay with a Lightning wallet to mint tokens that can be attached to a Nostr note and later redeemed by the recipient when they come back online.