--- Log opened Thu Sep 06 00:00:01 2018
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00:25 < ken2812221> Both #10102 and #13937 are down
00:25 < gribble> https://github.com/bitcoin/bitcoin/issues/10102 | HTTP Error 500: Internal Server Error
00:25 < gribble> https://github.com/bitcoin/bitcoin/issues/13937 | HTTP Error 500: Internal Server Error
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02:15 < wumpus> sipa_: before final
02:15 < wumpus> sipa: editing release notes should *not* happen in the branch right now, who is doing this?
02:16 < wumpus> editing the release notes should happen on the wiki
02:16 < wumpus> if anyone is doing something else, point them there
02:16 < wumpus> FWIW the wiki is also the 'preliminary release notes' link sent in the rc announcements
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03:03 < sipa_> wumpus: ok
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05:55 < wumpus> ok, https://github.com/bitcoin/bitcoin/milestone/33 has only release notes TODOs left, let's tag 0.17.0rc3 ?
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06:13 < ken2812221> ACK
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06:52 < wumpus>  * [new tag]                                                                           v0.17.0rc3 -> v0.17.0rc3
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07:01 < achow101> yay
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08:05 < provoostenator> ken2812221 they're down for me too. I sent an email to Github yesterday about another one; they're looking into it.
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10:14 < wumpus> same problem here
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10:39 < jamesob> anyone know if we have an easy way of testing zeromq PUBs?
10:40 < jamesob> i.e. triggering publications for the purpose of testing a client
10:41 < wumpus> regtest + zmq block notifications?
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10:41 < wumpus> (e.g. the same way as the functional test does it)
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10:44 < jamesob> yeah, that's probably easiest. thanks wumpus
10:46 < Chris_Stewart_5> Was there a bug in master recently related to -datadir? 
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10:47 < wumpus> Chris_Stewart_5: not that I know o, what kind of bug?
10:49 < Chris_Stewart_5> Ooh, nvm. Seems it might have been related to a systemd config
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11:26 < wumpus> right
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11:34 < jonasschnelli> sipa_: a) is the master key fingerprint optional?
11:34 < sipa_> jonasschnelli: where?
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11:35 < jonasschnelli> sipa: in the descriptor. :)
11:35 < jonasschnelli> would ... pkh(d34db33f/44'/0'/0':xpub6ERApfZwUNrhLCkDtcHTcxd75RbzS1ed54G1LkBUHQVHQKqhMkhgbmJbZRkrgZw4koxb5JaHWkY4ALHY2grBGRjaDMzQLcgJvLJuZZvRcEL/1/*)
11:35 < sipa> that's valid
11:35 < jonasschnelli> also work as pkh(xpub6ERApfZwUNrhLCkDtcHTcxd75RbzS1ed54G1LkBUHQVHQKqhMkhgbmJbZRkrgZw4koxb5JaHWkY4ALHY2grBGRjaDMzQLcgJvLJuZZvRcEL/1/*)
11:35 < sipa> yes of course
11:35 < jonasschnelli> Oh... NM, that is already implemented..
11:36 < sipa> it just doesn't have key origin info if you don't specify it
11:36 < jonasschnelli> Is a key origin always fingerprint & path or can it just be the fingerprint?
11:36 < sipa> it can just be fingerprint
11:36 < sipa> in case the path is empty
11:37 < jonasschnelli> okay... but that wouldn't not imply that the fingerprint must be the related xpubs fingerprint?
11:37 < sipa> uh, i guess it would be
11:38 < sipa> yeah, there isn't much sense in that case,  i guess
11:38 < jonasschnelli> I'm asking because the fingerprint could also be a hint to the signing device without revealing the path
11:38 < sipa> or at least it should be enforced
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11:53 < jonasschnelli> sipa: would it make sense to always support 'h' as hardened key indicator... 
11:53 < jonasschnelli> The parsing does not https://github.com/bitcoin/bitcoin/pull/13723/files#diff-0480c57f121cd5daa1bc3a495a51ebaeR562
11:54 < achow101> jonasschnelli: IMO yes. that's part of one my import things PRs
11:54 < jonasschnelli> And I just looked up, ... there is no "clear" standard for derivation path (BIP32 doesn't mention it specific)
11:54 < achow101> the BIP uses h/H too
11:54 < jonasschnelli> achow101: is there a spec how to specify a derivation path? I think this is something that is vaguely defined.
11:55 < sipa> jonasschnelli: the parser should always support h wherever ' is supported
11:55 < jonasschnelli> agree
11:55 < sipa> there are even tests for that
11:55 < achow101> jonasschnelli: doesn't bip 32 say>?
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11:56 < sipa> jonasschnelli: https://github.com/bitcoin/bitcoin/blob/master/src/script/descriptor.cpp#L439
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11:59 < jonasschnelli> sipa: but https://github.com/bitcoin/bitcoin/pull/13723/files#diff-0480c57f121cd5daa1bc3a495a51ebaeR562 ?
12:00 < sipa> jonasschnelli: that's not used by the descriptor code
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12:00 < wumpus> #startmeeting
12:00 < lightningbot> Meeting started Thu Sep  6 19:00:30 2018 UTC.  The chair is wumpus. Information about MeetBot at http://wiki.debian.org/MeetBot.
12:00 < lightningbot> Useful Commands: #action #agreed #help #info #idea #link #topic.
12:00 < gmaxwell> Hi
12:00 < achow101> hi
12:01 < jonasschnelli> hi
12:01 < wumpus> #bitcoin-core-dev Meeting: wumpus sipa gmaxwell jonasschnelli morcos luke-jr btcdrak sdaftuar jtimon cfields petertodd kanzure bluematt instagibbs phantomcircu
12:01 < wumpus> it codeshark michagogo marcofalke paveljanik NicolasDorier jl2012 achow101 meshcollider jnewbery maaku fanquake promag provoostenator
12:01 < wumpus> PSA: v0.17.0rc3 has been tagged
12:01 < wumpus> topics?
12:02 < sipa> \o/
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12:02 < meshcollider> hi
12:03 < gmaxwell> Seems things have been kind of quiet.
12:03 < wumpus> yes, quiet week
12:03 < provoostenator> hi
12:04 < jnewbery> hi
12:04 < gmaxwell> phantomcircuit (your ping got cut, perhaps you'd like to talk about your poll() work, if you're around)
12:04 < Chris_Stewart_5> Thoughts on merging #12775 ? Do we want it enabled in .travis.yml by default? 
12:04 < gribble> https://github.com/bitcoin/bitcoin/issues/12775 | Integration of property based testing into Bitcoin Core by Christewart · Pull Request #12775 · bitcoin/bitcoin · GitHub
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12:04 < wumpus> Chris_Stewart_5: yeah that one should be merged...
12:04 < phantomcircuit> Hello
12:04 < Chris_Stewart_5> sorry, RAPIDCHECK=1 in DEP_OPTS
12:05 < wumpus> Chris_Stewart_5: and it makes sense to have it enabled for at least one travis build if it's merged, after all, otherwise it'll probably get under-tested
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12:05 < phantomcircuit> i'm working on implementing poll on *nix systems, the first step is to cleanup ThreadSocketHandler to separate the select() logic from the rest of the logic
12:05 < wumpus> oh topic
12:05 < wumpus> #topic poll() (phantoncircuit)
12:06 < Chris_Stewart_5> wumpus: I'll try to take care of that in the next 2 days
12:06 < phantomcircuit> i've started that in #14147 (which is as far as im going to go in that particular pr)
12:06 < gribble> https://github.com/bitcoin/bitcoin/issues/14147 | net: Refactor ThreadSocketHandler by pstratem · Pull Request #14147 · bitcoin/bitcoin · GitHub
12:06 < wumpus> Chris_Stewart_5: I mean it'd be perfectly valid to say you don't want to hold up this PR for that, and do it later
12:06 < wumpus> Chris_Stewart_5: just be clear :)
12:07 < phantomcircuit> next step after that is going to be to separate the socket handling logic from the select() logic
12:07 < wumpus> phantomcircuit: good
12:07 < gmaxwell> phantomcircuit: my understanding is that your refactors are driven by a more complete set of commits that go all the way to actually enabling poll, you just haven't PRed the ret, right?
12:07 < phantomcircuit> gmaxwell, right
12:08 < wumpus> so enabling poll turns out to be more work than was expected, I was told at some point it'd basically be a five-line patch, or is this because you want to do it properly? :)
12:09 < sipa> it seems we're pretty close on track for the 0.17 release schedule
12:09 < gmaxwell> he's doing it more properly.
12:10 < gmaxwell> ISTM at least the current PR is a perfectly fine change even considered independantly of poll().
12:10 < phantomcircuit> doing it more property, there's a smaller patchset possible but that does things like iterate over every fd for every cnode looking for it's own fd
12:10 < phantomcircuit> which is O(n^2) worst case for n = vNodes.size()
12:10 < phantomcircuit> so probably dont want to do that
12:10 < wumpus> ok, yes, that would be good to avoid, we don't want to worsen performance
12:11 < wumpus> right, thanks for the explanation, it's common for people to underestimate how much work something is anyhow :)
12:11 < gmaxwell> I think I made the 5 line comment before, but it was based on an actual ~5 line patch that matt was previously using. :P
12:12 < phantomcircuit> and indeed the current patchset is specifically selected to make sense even without poll() (but that's certainly why im doing it)
12:13 < wumpus> should we add 14147 to high priority for review? I suppose it's blocking further work for you
12:13 < phantomcircuit> poll() works more like epoll than select, specifically there's no equivalent for FD_ISSET, so either you need to keep some sort of mapping or iterate over them
12:14 < phantomcircuit> i believe matts patchset just iterated which is trivial but certainly not what we want to do
12:14 < wumpus> indeed
12:14 < wumpus> it was just aproof of concept then
12:14 < sipa> makes sense
12:14 < phantomcircuit> wumpus, im building off that pr for the rest of the poll() logic assuming it'll eventually be fine
12:15 < phantomcircuit> there's 7 commits to that pr and 100 loc changed but mostly that's just moving things
12:15 < BlueMatt> I mean iterating is essentially fine, really
12:15 < gmaxwell> It's a nearly trivial review in any case. It's just moving things around. 
12:15 < BlueMatt> its not like we're handling 10k connections
12:15 < gmaxwell> ?w=1 eliminates 90% of the diff. :)
12:15 < BlueMatt> (and less error-prone than tracking things with CNodes)
12:15 < BlueMatt> cause we've had errors in the past with CNode deletion ordering....
12:15 < BlueMatt> or, if not errors, shitloads of complication that made review hard
12:16 < gmaxwell> I agree that iterating is fine for a few hundred connections, but I think we'd prefer to avoid it unless we really do get mired in review.
12:16 < wumpus> anyhow, let's review phantomcircuit 's work
12:16 < BlueMatt> wumpus: yea, fair
12:16 < wumpus> I don't see the point of discussing this now
12:16 < BlueMatt> yep
12:17 < wumpus> if it's really so hard to review (there's nothing what people have said that would suggest that) then of course we can look for another solution
12:17 < wumpus> any other topics?
12:17 < gmaxwell> +1
12:18 < gmaxwell> sipa: wumpus: Where did we ever land in replacing the openssl RNG?
12:18 < wumpus> #topic replacing the openssl RNG
12:18 < wumpus> good question, I think that kind of stranded at some point
12:18 < sipa> gmaxwell: i don't feel like spending much work on it
12:18 < gmaxwell> It would be nice if we could finally be rid of the dependency in 0.18.
12:19 < sipa> but we should probably write some requirements for what it needs to be replaced with
12:19 < wumpus> ok so someone would need to pick up sipa 's old work probably
12:19 < gmaxwell> I think in part because we reasonably wanted to break some of it off into a library, and then that sounded like too much work. :)
12:19 < sipa> yes
12:20 < meshcollider> Is there an old PR or something
12:20 < wumpus> I don't care about that part anymore
12:20 < meshcollider> Or a gist
12:20 < moneyball> suggested topic: Tokyo CoreDev topic ideas
12:20 < gmaxwell> I'd be happy to do something, but I also really don't feel like making a library right now. (or rather, I'd prefer to spend that time working on something else)
12:20 < wumpus> just put it in its own subdirectory under src, someone that wants it as library can do the work for that
12:21 < wumpus> if not, there's no need to do build system work etc
12:21 < provoostenator> meshcollider: #10299
12:21 < gribble> https://github.com/bitcoin/bitcoin/issues/10299 | Remove OpenSSL by sipa · Pull Request #10299 · bitcoin/bitcoin · GitHub
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12:21 < meshcollider> provoostenator: thanks
12:21 < gmaxwell> (in particular, librarizing it is hard because a library ought to be reentrant and probably C callable ... which are things that don't matter much for our own use)
12:21 < wumpus> I know all too well how frustrating making libraries for c++ is
12:21 < luke-jr> why would it be C++?
12:22 < wumpus> lol...
12:22 < provoostenator>  CoreDev topic ideas: hardware wallet support, faster wallet bootstrap (i.e. sync in background)
12:22 < wumpus> yesl et's start piling up other requirements as well
12:22 < wumpus> ok, another topic?
12:22 < gmaxwell> luke-jr: So one of the things we could do for it would be rewrite in C, but thats something that people don't feel like doing.
12:22 < provoostenator> Probably continue the coin selection fun?
12:22 < wumpus> let's rewrite it in rust !
12:23 < moneyball> wumpus suggested topic: Tokyo CoreDev topic ideas
12:23 < kanzure> hi.
12:23 < wumpus> #topic Tokyo CoreDev topic ideas (provoostenator)
12:23 < sipa> CoreDev topics: descriptors and extensions to them
12:23 < kanzure> already on there
12:23 < jtimon> rust all your problems
12:23 < kanzure> what would you guys like to hjear from other people, and/or from yourselves
12:23 < moneyball> kanzure has reached out to some folks, and i plan to as well to solicit topic ideas. also feel free to share them here as you are already doing :)
12:23 < wumpus> jtimon: I have C/C++ burnout
12:24 < kanzure> oh no that's terminal
12:24 < jtimon> wumpus: well, you write python too :p
12:24 < wumpus> jtimon: python is still somewhat cute
12:25  * jonasschnelli can't be in Tokyo :/
12:25 < achow101> kanzure: moneyball: what are the current topics, if any?
12:25 < gmaxwell> I'd like to see kallewoof's progress on input grouping get done.
12:25 < sipa> wumpus: thankfully carbon doesn't rust
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12:25 < wumpus> sipa: heh!
12:26 < kanzure> achow101: PSBT, hardware wallet stuff, output descriptors, input grouping, schnorr signatures BIP stuff, forward blocks, client-side filtering, lattice-based digital signatures, coin selection, #13869
12:26 < gribble> https://github.com/bitcoin/bitcoin/issues/13869 | Filename and command line encoding issue on Windows · Issue #13869 · bitcoin/bitcoin · GitHub
12:26 < gmaxwell> Maybe people could think about rhavar's bustapay... I think it might be reasonable to support it in the bitcoin core wallet. 
12:26 < gmaxwell> lattice-based digital signatures?!?!
12:26 < kanzure> who would be a good candidate to fly the flag of bustapay
12:27 < kanzure> gmaxwell: it's a meshcollider thing
12:27 < moneyball> here is what kanzure has collected so far, from about 10 people:
12:27 < moneyball> * partially signed bitcoin transactions
12:27 < moneyball> * hardware wallet support
12:27 < moneyball> * script validation
12:27 < moneyball> * input grouping
12:27 < moneyball> * output descriptors
12:27 < moneyball> * Schnorr signatures BIP
12:27 < moneyball> * k-of-n threshold signatures using Schnorr
12:27 < moneyball> * forward blocks
12:27 < moneyball> * hardware wallet support in Bitcoin Core
12:27 < moneyball> * status of client-side filtering and neutrino
12:27 < moneyball> * client side filtering
12:27 < sipa> please don't paste long lists in IRC
12:27 < meshcollider> Heh I don't think it's worth discussing lattice sigs at CoreDev
12:27 < moneyball> oh, sorry
12:27 < meshcollider> That's just what I'm working on
12:28 < achow101> kanzure: re bustapay, me? I was part of the meeting that came up with the basis for that
12:28 < kanzure> okay it is you
12:28 < kanzure> done
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12:29 < jnewbery> maybe offtopic for now, but how is bustapay different from p2ep?
12:29 < wumpus> nah pasting 12 lines which are relevant topics isn't that bad, but yes, never do that with error messages / logs pelase :)
12:29 < BlueMatt> "forward blocks"
12:29 < BlueMatt> ?
12:29 < instagibbs> BlueMatt, maaku's thing
12:29 < instagibbs> IIRC
12:29 < kanzure> BlueMatt: time travel exploit
12:29 < achow101> jnewbery: it's basically the same thing, but actually implemented
12:30 < gmaxwell> jnewbery: actually implementable and not woo.
12:30 < kanzure> moneyball and i will be heckling each of you for more topic suggestions soon, thanks for the input
12:30 < achow101> it cuts out some of the complexity as a tradeoff for a possible and very small (IMO) privacy risk
12:30 < BlueMatt> ah, right, the exploit-timeward-to-change-blocktime-and-fork-to-lock-it-in thing....I feel like thats something that needs more broad bitcoin-dev or whatever discussion, its not something to be discussed a technical planning meeting
12:30 < wumpus> do you need even more topics? seems a decent list
12:31 < kanzure> this list is tiny compared to last few times; it'll grow.
12:31 < BlueMatt> dandelion, depending on who's there, should be discussed
12:31 < wumpus> none trivial
12:31 < jtimon> kallewoof: has been working on a "signet" branch I'm currently reviewing and testing that allows the creation of signed blocks testchains ala elements, not sure if that could be a topic, but I would be very happy to see something like that get into master at some point
12:31 < instagibbs> BlueMatt, ACK
12:31 < sipa> agree with BlueMatt as well
12:31 < kanzure> jtimon: added
12:31 < kanzure> BlueMatt: added
12:31 < gmaxwell> agree with BlueMatt as well
12:32 < BlueMatt> agree with BlueMatt as well
12:32 < BlueMatt> wait, hmmm
12:32 < kanzure> don't do that you'll break the universe
12:32 < sipa> try typing 'google' into google
12:33 < michagogo> Or ‘recursion’
12:33 < BlueMatt> Did you mean recursion?
12:33 < sipa> BlueMatt: it was an it crowd joke
12:33 < provoostenator> Something that might be worth putting in the meeting minutes: multiple PR's are suffering from 500 server error for multiple days. Apparantly Github is aware of the problem.
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12:34  * BlueMatt emailed support and got back a "we're looking into it, its visible on a few projects"
12:34 < achow101> do we have so many PRs and issues that we broke github?
12:34 < wumpus> github is falling apart, so soon after ms took it over
12:34 < sipa> nah, it was falling apart before
12:34 < wumpus> I think they switched the server hosting to windows 95
12:35 < sipa> haha
12:35 < wumpus> if it helps I'll send a mail too
12:35 < luke-jr> at least not ME
12:35 < wumpus> haah then it would alrady be gone
12:35 < kanzure> other topics?
12:36 < gmaxwell> WinCE.
12:36 < michagogo> How did everyone get a bionic gitian environment working?
12:36 < meshcollider> MS haven't actually taken over yet have they
12:36 < luke-jr> michagogo: I ended up installing from the iso by hand
12:36 < sipa> https://i.imgur.com/zh4F55R.png
12:36 < wumpus> deep magic voodoo rituals
12:36 < luke-jr> michagogo: and patching gitian to work with it
12:36 < wumpus> #topic gitian build on bionic
12:36 < meshcollider> sipa: lol
12:37 < provoostenator> Works
12:37 < wumpus> with LXC it's easy, just the standard steps
12:37 < achow101> both lxc and docker work
12:37 < achow101> but according to luke-jr kvm is broken again as apparently the new vmbuilder doesn't work?
12:37 < achow101> (I haven't tried yet)
12:38 < michagogo> wumpus: make-base-vm —lxc —suite bionic seemed to work for me (finished without error), but the result seems broken
12:38 < jonasschnelli> define "broken"?
12:38 < luke-jr> michagogo: latest gitian?
12:38 < michagogo> Yep
12:38 < michagogo> (On a xenial host)
12:39 < wumpus> these additional steps are what I had to do for gitian building on debian 9.5 with LXC: https://gist.github.com/laanwj/c62e101bfd68718f0686926dfd10666b
12:40 < wumpus> (e.g. I needed a new lxc version, as well as a new version of debootstrap as it was lacking the bionic script)
12:41 < wumpus> if it built the image then I think that part went right, but you might have an too-old version of LXC that cannot handle bionic
12:41 < wumpus> I don't remember what the minimum version is that works, jonasschnelli might
12:41  * jonasschnelli looking
12:42 < jonasschnelli> stable-2.1
12:42 < wumpus> yea 2.1.5 or something?
12:42  * luke-jr wonders why bionic needs special LXC support
12:43 < jonasschnelli> I think its 2.1.1
12:43 < jonasschnelli> jup. 2.1.1. is min
12:43 < wumpus> thanks!
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12:44 < achow101> you need at least 2.1.x
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12:44 < wumpus> michagogo: which lxc version did you try with?
12:46 < michagogo> wumpus: whatever’s in xenial-updates
12:46 < achow101> michagogo: do `lxc-start --version`
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12:49 < promag> hi :|
12:50 < wumpus> Package: lxc1 (2.0.8-0ubuntu1~16.04.2) 
12:50 < wumpus> so, too old.
12:50 < wumpus> promag: hi
12:51 < wumpus> other topics?
12:52 < wumpus> #endmeeting
12:52 < lightningbot> Meeting ended Thu Sep  6 19:52:31 2018 UTC.  Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)
12:52 < lightningbot> Minutes:        http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-09-06-19.00.html
12:52 < lightningbot> Minutes (text): http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-09-06-19.00.txt
12:52 < lightningbot> Log:            http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-09-06-19.00.log.html
12:52 < sipa> seems not
12:53 < meshcollider> 7:25 am <gmaxwell> I'd like to see kallewoof's progress on input grouping get done.
12:53 < meshcollider> What's this referring to?
12:53 < luke-jr> #12257 probably?
12:53 < gribble> https://github.com/bitcoin/bitcoin/issues/12257 | [wallet] Use destination groups instead of coins in coin select by kallewoof · Pull Request #12257 · bitcoin/bitcoin · GitHubAsset 1Asset 1
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12:54 < gmaxwell> especially the "group for everyone, if it doesn't make your fees higher" part that got dropped at the last minute.
12:54 < luke-jr> but it's already merged, so.. dunno
12:54 < luke-jr> ah
12:54 < gmaxwell> it got gimped before being merged. :P
12:58 < meshcollider> oh
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13:03 < michagogo> Yep, 2.0.8
13:03 < michagogo> “lxc-init: missing container name, use —name option”
13:04 < michagogo> Maybe I’ll upgrade my VM to 18.04
13:04 < MarcoFalke> We should put the minimum version into https://github.com/bitcoin-core/docs
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13:08 < michagogo> sudo do-release-upgrade
13:08 < michagogo> er
13:12 < wumpus> MarcoFalke: yes, would make sense
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13:27 < sipa> jonasschnelli: to be clear, if you have an xpub without key origin in a descriptor, it'll still report a fpr/path in its expansion; just one with fpr = xpub's short id, and empty path
13:28 < jonasschnelli> ok
13:29 < sipa> i think i'll add a test that if you supply a key origin with empty path, its hash matches the xpub's short id
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14:07 < michagogo> Okay, I'm now running bionic
14:11 < michagogo> And yep, looks like now the build's working
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15:06 < michagogo> So, hey, looks like my new i7-8750H is quite a bit faster than my i7-3610QM :D
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18:24 < phantomcircuit> LogPrintf is deprecated right?
18:26 < aj> it is?
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18:46 < phantomcircuit> aj, seems like it should be ?
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18:53 < sipa> phantomcircuit: why would it be?
18:53 < sipa> or rather, what else would you use?
18:55 < phantomcircuit> LogPrint ?
18:56 < sipa> one is for messages that are always to be printed, the other only conditionally
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--- Log closed Fri Sep 07 00:00:02 2018