No, without the xpub step. My idea was just to use the regular nostr pubkey to send sats to people that are not Bitcoin ready yet.
Discussion
You could hide all that from the user, users would only know npubs. Otherwise maybe you can have a look at paynyms in bitcoin, don't know the inner workings but maybe it would be possible to use npub instead of a paynym code.
Would be more useful to accumulate Sats for someone not yet on #nostr.
Usecase: someone’s external post gets shared here but they’re not on nostr. They can join and collect those Sats
Yep, that's the goal. Or if they are here, but they just haven't setup their ln address yet.
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When tipping people that are not ready to be tipped by bitcoin I usually shared private keys with them, together with a disclaimer that these funds may get taken by me if they don't use them within 3 months. I printed that on paper wallets and so far I did not take any back but I fancy to believe I keep the backup somewhere in case I need to. I've seen waitresses throw away extra tips in Bitcoin right in front of me and I know that less than 5% did redeem the coins a year after I left them as tips, so by keeping a backup I can mathematically be 20 times more generous with my tips if I collect the lost coins later.
The same will apply to nostr users. They might not be that unlikely to "get" Bitcoin but I'm sure half of them will lose their nsec or not care about bitcoin ever.