Honestly, I think this is a pretty big deal.
In brief, a payer lightning wallet using #nostr #safebox under the hood can detect if the payee address is also a #nostr #safebox address. If so the payment is completely negotiated and cleared with cashu tokens, without ever touching lightning at all. That means a totally private payment system can be built that invisibly works on top of lightning and automatically back to lightning whenever needed.
The user never knows the difference.
