--- Log opened Tue Aug 13 00:00:38 2019
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17:45 < fiatjaf> where can I read about how channels are going to work with taproot scripts? or aren't there any plans for that?
17:48 <+roasbeef> fiatjaf: there's some loose sketches on the ML, but it's also pretty far off fwiw 
17:48 <+roasbeef> more stuff changes when you add in schnorr also 
17:49 <+roasbeef> for example no more naked payment hashes in scripts 
18:04 < rusty> Yeah, and now they're talking 32-byte pubkeys for bip-schnorr, so ...
18:15 < fiatjaf> thank you. I'm reading some random things in the mailing list now... I think I have to understand a bit more of taproot before even being able to formulate my questions.
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18:21 <+roasbeef> fiatjaf: at a high level, you can partition any conditionals in our scripts into distinct branches in the merkle script tree 
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18:28 <+roasbeef> also it may actually change signing somewhat, atm it also has an explicit requirement that you know the input values of all scripts you sign, right now we only need the input we're signing, but we'll now need the context of the entire transaction as well 
18:28 <+roasbeef> i've loosely proposed that be changed to just be the total fee of the transaction
18:29 <+roasbeef> there's other lower level stuff that change how we'd handle signing and also redemption on chain operationally 
18:30 < bitconner> one things certain tho, debugging is going to be much harder lol
18:32 <+roasbeef> yeh...."oh! I had the order of the scripts flipped in the merkle tree before hashing" 
18:33 <+roasbeef> "oh! I used the wrong internal sighash type, but the external was correct" 
18:33 <+roasbeef> "oh! we added another input to use as fees for RBF, but then didn't re-sign all the other inputs since it needs to know about that input value now" 
18:36 <+roasbeef> all multi-sig is also diff now, CMS has been disowned, but in our case, everything is 2-of-2 rn we'd just end up using an aggregated sig anyway 
18:48 < bitconner> or even just "which one is the funding output" lol
18:48 <+roasbeef> heh yeh
18:49 <+roasbeef> will also be easier for ppl to inflate these "NUMBA CHANNELS GO UP" graphs 
18:49 < aj> if you add an input you have to resign all the sighash_all signatures anyway, whether they directly commit to the input amounts or not
18:50 <+roasbeef> true, just a bit more data now to send in the multi-party case (guess yet another PSBT extension) 
18:52 < aj> taproot will need a bunch of extensions for signing with musig/aggregated public keys
18:52 < aj> err, psbt will need the extensions to support taproot i mean
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19:05 <+roasbeef> YAPSBTE 
19:10 < rusty> Yeah, I'm assuming we're all on dual-funding by then anyway, where both sides negotiate to co-construct the tx.  Even if one side is empty, it's easier to have one model for funding.
19:11 <+roasbeef> you wouldn't always want to do dual funding tho 
19:11 <+roasbeef> oh you mean like the message flow?
19:11 < rusty> roasbeef: yeah.
19:11 <+roasbeef> idk there's still the whole input leak thing, so even if i'm not putting anything up, i can just back out 
19:12 < rusty> roasbeef: yes, I've been unable to find a great solution to that :(
19:13 <+roasbeef> something, something coin join? kek 
19:13 < rusty> something, something zkp?
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--- Log closed Wed Aug 14 00:00:40 2019