Oddbean new post about login | logout also, for people interested in the zaps/cashu/lightning route for spam, i think using PoW underneath is much better. imagine we have people that provide a good hashrate and you give them 21 sats for a note of 35 bits or something.
sha256 pow is so optimized and built out already though. One spammer with an asic would make this method moot.
that’s what i’m saying: imagine you pay 21 sats to someone with an optimised ASIC(?)/GPU set-up, to do the proof-of-work for your note and then you sign it. and a PoW provider can be interacted with in many different ways (doesn’t have to be a lightning payment), which doesn’t make us rely on something niche which most new users aren’t get be set up with.
What if you could somehow provably burn 21 sats?