I’m new to Cashu. But I feel like this could be much simpler.

Here the mint is the rule enforcer, isn’t he? Could this work:

A = user. B = service provider.

1. Say A locks 1000 sats with the mint for B using B’s pubkey as a 2/2 multisig (enforced by the mint). Let’s give a unique identifier for this lock. lock_21

2. The mint gives a receipt to A signed with their pubkey. This receipt contains the lock id, amount, B’s pubkey, timestamp and a future timestamp (valid until).

3. Now A sends this receipt to B when they first interact with each other. B can verify that the mint signed this receipt. And start providing services.

4. Everytime A wants to do a micro payment, A signs a message with lock id (lock_21), nonce and amount then sends it to B.

5. After many many txns, B goes to the mint, submits all the messages and claims the amount they’re supposed to receive from the locked tokens. A can then withdraw the remaining funds from the mint with B’s closure signature (happy ending) or after the locked funds expire.

6. B cannot be malicious here at all. A cannot be malicious here either as they cannot withdraw funds before the expiry of locked funds.

Mints can offer this service for a fee maybe.

Pls correct if this has some major loopholes 😅