Ruben @RubenSomsen joined @AaronvanW and me again to explain utreexo, a way to sync nodes with extremely little RAM, at the expense over more bandwidth: https://nadobtc.libsyn.com/-utreexo-w-ruben-somsen-nado-15
I'm still in the early days of thinking this through, but this idea from @RubenSomsen looks really excellent:
(Deliberately linking the tweet, because I believe you really need the diagram most of all to understand the idea, there is a gist linked in there too).
Basically coinswap with 2 instead of 4 transactions. This was always the dream for me, and it nicely connects with recent work on single signer ECDSA adaptors.
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