In minbits it has an off devive backup for if you lose your device. I assume that means the state data is backed up on nostr relays and you can recover with bip-39 seed?

I don't know how you can do offline transactions and prevent double spend. If you pay someone offline, but then restore your wallet from a backup before they come online and connect with the mint, wouldn't the money you gave them be invalid?

If you transact offline are you trusting the other person until you can connect to the mint?

#cashu #asknostr