sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja
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<pinheadmz>
oh never mind sipa of course already commented ;-)
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<andytoshi>
yeah, bip32 is super frustrating in a lot of ways
<andytoshi>
and like, fixing these problems always seems to come down to "you need zkps" or "you need pairings", it's not like it could've been better if we'd had a smarter design
<andytoshi>
i think sipa has indicated that he regrets including non-hard derivation ... but like, it's really useful even if it's footgunny
<pinheadmz>
andytoshi yeah xpubs are super useful especially for a watch-only wallet running on a server with actual private keys somewhere else. And who gives out private keys anyway?
<andytoshi>
yeah for signing keys i'm not sure there's any reason to share them ever
<andytoshi>
liquid has a problem with blinding keys, which sometimes you do need to share
<andytoshi>
it's otherwise very difficult to reveal an open-ended set of UTXOs values, and it's hard to do a multisig rangeproof without sharing blinding keys
<pinheadmz>
and actually i rememebr back with protoshares launch or something, presale investors were reselling their still-not-yet-launcehd coins by actually selling their private keys on a secondary market
<pinheadmz>
I'd like to learn more about how ZK proofs could be used to answer this quesiton (prove that two public keys are related without revealing parent key or chaincode)
<andytoshi>
it's pretty boring, you literally do the BIP32 derivations (hmac and all) inside a zkp
<andytoshi>
if you have a usecase for this you might wanna contact starkware, they have been trying to get into bitcoin for years and i keep suggesting they do off-chain utility stuff like this (or that they try to stark up blocks) and they don't seem to think it's cool enough to be worth the effort
<pinheadmz>
I'm just trying to learn. Heh, doing things inside a zkp isn't boring for me, I'm an intro-level crypto student
<andytoshi>
you might find something in the "starkware sessions" series about this sort of thing ... it's pretty eth focused so it's full of stuff about plasmas and dexes and whatever
<andytoshi>
but the underlying tech is what you want
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<pinheadmz>
thanks!
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