This is already a feature in many cashu wallets. This idea would add lightning back it to the flow where it seems that the goal of pablo is to remove the lightning node from the zap. That the ecash is the event. You can already send any ecash out of a mint you don't know to one you feel more confident in.
What I'd like see if where the recipient can be provide a list of mints that they trust, while payments from any other mint are swapped upon receipt to either lightning or one of the approved mints. And only then the zap is acknowledged.
cc nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg wen?
Discussion
If publishing which mints you trust is not a privacy concern, then the burden of moving to a trusted mint could be placed on the nutter's client to join the mint, move the funds in, and nut from there.
Yes but again moving mint to mint is a lightning hop. Already possible. Pablo is trying to remove the hop. His idea isn't replacing anything, he states in the demo that it is an additional option. Don't trust it don't us it.
If nutter and nuttee are using the same mint then no lightning transaction necessary. Matching up mints could be an efficiency gain. I still don't know whether publishing them is a good idea though.
Privacy of the nuttee is an interesting consideration. Though revealing that information is useful for a web of trust for mints.
Having the nutter pre-swap makes sense, though you shouldn't look a gifted horse in the mouth.