when ppl say offline payments is possible with ecash, is that practically true? yes i can give you a ecash token offline (via QR code scan or paper mail or something) but wouldn’t the recipient need an internet connection to check with the mint for double spending? so the payment can be initiated offline but cannot be completed offline. is this wrong?
Discussion
The sender can mint some ecash locked to the recipient's pubkey with a timeout after which the coins can be swept back to the senders wallet. This must be done before the sender goes offline.
So, it's technically possible but the UX is challenging. It seems a lot more promising with credit based ecash. Haven't thought through all of the scenarios, tho.