Nostr needs an ecash that follow the UTXO model on bitcoin

Cashu tokens add a level of complexity for Nostr clients

It would be much easier to just send proofs around, with the mint url attached to each.

Imagine you have 5 sats, represented as 2*2sats Proofs and 1*1 sats Proofs, and want to send 3 sats to someone.

Go to the mint, it will return you 1*2sats Proofs and 1*1sat Proof as UTXO to send to the recipient and 1*2sats Proofs for yourself.

Cashu mint do work like this already, but you'll need to wrap the proofs in a cashu tokens. In order for the recipient to know what the mint url is for these proofs.

If the mint url is attached to the proofs, devs are free to drop the cashu tokens entirely.

nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg