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252018-01-25T01:45:48 <bitcoin-git> [bitcoin] MarcoFalke pushed 7 new commits to master: https://github.com/bitcoin/bitcoin/compare/f359afcc4104...6970b30c6f1d
262018-01-25T01:45:49 <bitcoin-git> bitcoin/master ca6523d Anthony Towns: [tests] Rename feature_* functional tests.
272018-01-25T01:45:49 <bitcoin-git> bitcoin/master 90600bc Anthony Towns: [tests] Rename wallet_* functional tests.
282018-01-25T01:45:50 <bitcoin-git> bitcoin/master 61b8f7f Anthony Towns: [tests] Rename p2p_* functional tests.
292018-01-25T01:46:19 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11774: [tests] Rename functional tests (master...rename_tests) https://github.com/bitcoin/bitcoin/pull/11774
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422018-01-25T02:04:54 <bitcoin-git> [bitcoin] kallewoof opened pull request #12265: [test] fundrawtransaction: lock watch-only shared address (master...test-fundrawtransaction-lockunspent) https://github.com/bitcoin/bitcoin/pull/12265
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532018-01-25T02:21:38 <bitcoin-git> [bitcoin] TheBlueMatt opened pull request #12266: Move scheduler/threadGroup into common-init instead of per-app (master...2018-01-common-init) https://github.com/bitcoin/bitcoin/pull/12266
542018-01-25T02:21:39 <BlueMatt> cfields: #12266
552018-01-25T02:21:41 <gribble> https://github.com/bitcoin/bitcoin/issues/12266 | Move scheduler/threadGroup into common-init instead of per-app by TheBlueMatt · Pull Request #12266 · bitcoin/bitcoin · GitHub
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672018-01-25T02:40:58 <sipa> added 0.16 tag
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1532018-01-25T05:59:10 <bitcoin-git> [bitcoin] statebits opened pull request #12267: Update blockchain size in Ravencoin/doc/Readme (master...master) https://github.com/bitcoin/bitcoin/pull/12267
1542018-01-25T05:59:37 <bitcoin-git> [bitcoin] statebits closed pull request #12267: Update blockchain size in Ravencoin/doc/Readme (master...master) https://github.com/bitcoin/bitcoin/pull/12267
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1712018-01-25T06:32:34 <ProfMac> Does it make sense to do the git clone into /opt, /var/opt, or ~{$USER}/opt
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1752018-01-25T06:38:33 <jonasschnelli> ProfMac: i guess that depends...
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1772018-01-25T06:38:55 <jonasschnelli> clone it to wherever you have enough space to compile... :)
1782018-01-25T06:39:17 <jonasschnelli> I would recommend within you userspace
1792018-01-25T06:39:45 <jonasschnelli> If you want to make the binaries accessable to everyone, use "make install" (probably sudo)
1802018-01-25T06:41:32 <ProfMac> jonasschelli, thanks. Userspace then make install makes good sense.
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2512018-01-25T09:57:17 <promag> iiuc #12265 fixes a bug in the test, should be 0.16?
2522018-01-25T09:57:19 <gribble> https://github.com/bitcoin/bitcoin/issues/12265 | [test] fundrawtransaction: lock watch-only shared address by kallewoof · Pull Request #12265 · bitcoin/bitcoin · GitHub
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2562018-01-25T10:06:59 <promag> jnewbery: flake8 --ignore=B,C,E,F,I,N,W --select=F401 test/functional/p2p-versionbits-warning.py in master I get not warnings
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2582018-01-25T10:07:12 <promag> s/not/no
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2972018-01-25T12:41:27 <jnewbery> promag: that's because --ignore is suppressing all the warnings
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2992018-01-25T12:44:49 <jnewbery> our Travis linter only checks for F401 (module imported but unused), but in general it's preferable to follow PEP8, all other things being equal: https://github.com/bitcoin/bitcoin/blob/6970b30c6f1d2be7947295fe18f2390649b17a4b/test/functional/README.md#style-guidelines
3002018-01-25T12:46:38 <promag> ok got it
3012018-01-25T12:46:55 <promag> so how do you usually run?
3022018-01-25T12:47:16 <promag> flake8 file?
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3062018-01-25T12:56:57 <jnewbery> I use Syntastic in vim so it runs flake8 every time I save a python file. My ~/.config/flake8 file has:
3072018-01-25T12:57:25 <jnewbery> ignore = E302,E305,E501,E731
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3122018-01-25T13:07:27 <bitcoin-git> [bitcoin] MarcoFalke pushed 4 new commits to master: https://github.com/bitcoin/bitcoin/compare/6970b30c6f1d...598a9c4e4dcd
3132018-01-25T13:07:28 <bitcoin-git> bitcoin/master ef2beb2 John Newbery: Fix flake8 warnings in p2p-versionbits-warning.py
3142018-01-25T13:07:28 <bitcoin-git> bitcoin/master 3bbd843 John Newbery: Improve comments/logging in p2p-versionbits-warning.py
3152018-01-25T13:07:29 <bitcoin-git> bitcoin/master 1e2e09e John Newbery: Fix intermittent failure in p2p-versionbits-warning.py...
3162018-01-25T13:08:31 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #12264: Fix versionbits warning test (master...fix_versionbits_warning_test) https://github.com/bitcoin/bitcoin/pull/12264
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3242018-01-25T13:28:21 <promag> thanks jnewbery
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3262018-01-25T13:31:21 * wumpus should probably start doing that too
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3372018-01-25T14:27:52 <mrannanay> @jnewbery I can relate so much xD
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3592018-01-25T15:39:27 <bitcoin-git> [bitcoin] gmaxwell opened pull request #12269: Update defaultAssumeValid to block 506067 (master...201801-update-assumevalid) https://github.com/bitcoin/bitcoin/pull/12269
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4142018-01-25T18:05:49 <bitcoin-git> [bitcoin] laanwj pushed 3 new commits to master: https://github.com/bitcoin/bitcoin/compare/598a9c4e4dcd...16bac24f60fa
4152018-01-25T18:05:50 <bitcoin-git> bitcoin/master 55f52bd Wladimir J. van der Laan: contrib: Update ATTERN_AGENT to include 0.15.x
4162018-01-25T18:05:50 <bitcoin-git> bitcoin/master 1e90544 Wladimir J. van der Laan: net: Update hardcoded seeds...
4172018-01-25T18:05:51 <bitcoin-git> bitcoin/master 16bac24 Wladimir J. van der Laan: Merge #12262: net: Hardcoded seed update...
4182018-01-25T18:06:20 <bitcoin-git> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/16bac24f60fa...2ae7cf8ef5be
4192018-01-25T18:06:20 <bitcoin-git> bitcoin/master bde8bcd Gregory Maxwell: Update defaultAssumeValid according to release-process.md....
4202018-01-25T18:06:21 <bitcoin-git> bitcoin/master 2ae7cf8 Wladimir J. van der Laan: Merge #12269: Update defaultAssumeValid to block 506067...
4212018-01-25T18:06:35 <bitcoin-git> [bitcoin] laanwj closed pull request #12269: Update defaultAssumeValid to block 506067 (master...201801-update-assumevalid) https://github.com/bitcoin/bitcoin/pull/12269
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4242018-01-25T18:21:12 <bitcoin-git> [bitcoin] laanwj opened pull request #12270: Update chainTxData for 0.16 (master...2018_01_chainstats) https://github.com/bitcoin/bitcoin/pull/12270
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4352018-01-25T18:41:40 <bitcoin-git> [bitcoin] Ov3rlo4d closed pull request #12029: Build: Add a makefile target for Doxygen documentation (master...make-doxygen) https://github.com/bitcoin/bitcoin/pull/12029
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4372018-01-25T18:44:23 <bitcoin-git> [bitcoin] Ov3rlo4d reopened pull request #12029: Build: Add a makefile target for Doxygen documentation (master...make-doxygen) https://github.com/bitcoin/bitcoin/pull/12029
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4532018-01-25T19:00:17 <achow101> meeting?
4542018-01-25T19:00:23 <wumpus> #startmeeting
4552018-01-25T19:00:23 <lightningbot> Meeting started Thu Jan 25 19:00:23 2018 UTC. The chair is wumpus. Information about MeetBot at http://wiki.debian.org/MeetBot.
4562018-01-25T19:00:23 <lightningbot> Useful Commands: #action #agreed #help #info #idea #link #topic.
4572018-01-25T19:00:42 <provoostenator> Hi
4582018-01-25T19:00:51 <wumpus> #bitcoin-core-dev Meeting: wumpus sipa gmaxwell jonasschnelli morcos luke-jr btcdrak sdaftuar jtimon cfields petertodd kanzure bluematt instagibbs phantomcircuit codeshark michagogo marcofalke paveljanik NicolasDorier jl2012 achow101 meshcollider jnewbery maaku fanquake promag provoostenator
4592018-01-25T19:00:55 <jonasschnelli> hi
4602018-01-25T19:00:55 <achow101> can we release 0.16 yet?
4612018-01-25T19:01:11 <meshcollider> Hi
4622018-01-25T19:01:23 <wumpus> today or tomorrow, hopefully
4632018-01-25T19:01:25 <instagibbs> perhaps an RC first
4642018-01-25T19:01:28 <wumpus> there's still two PRs open
4652018-01-25T19:01:32 <wumpus> instagibbs: always
4662018-01-25T19:01:36 <cfields> hi
4672018-01-25T19:01:40 <kanzure> hi.
4682018-01-25T19:01:44 <instagibbs> wumpus, thatsthejoke.gif
4692018-01-25T19:01:52 <wumpus> https://github.com/bitcoin/bitcoin/milestone/30
4702018-01-25T19:02:25 <instagibbs> not sure how to evaluated the chain stats one
4712018-01-25T19:02:26 <jtimon> before releasing we would need to fork from master, no?
4722018-01-25T19:02:40 <instagibbs> jtimon, can happen immediately after, afaik
4732018-01-25T19:02:46 <wumpus> so the chaintxdata needs to be checked and BlueMatt's pr reviewed
4742018-01-25T19:02:48 <instagibbs> well, version bump ofc
4752018-01-25T19:02:54 <wumpus> jtimon: yes, no way I'm going to forget that
4762018-01-25T19:02:57 <jtimon> instagibbs: without rc?
4772018-01-25T19:02:58 <Chris_Stewart_5> hello
4782018-01-25T19:03:02 <achow101> jtimon: branching happens right before rc is tagged
4792018-01-25T19:03:11 <jtimon> achow101: right
4802018-01-25T19:03:14 *** Randolf has quit IRC
4812018-01-25T19:03:21 <wumpus> branch -> [on 0.16 branch] change version information -> tag rc
4822018-01-25T19:03:29 <cfields> oh shit, I never PR'd the rpc fd exhaustion fix. wumpus: ok to do that right after meeting and add to 0.16 milestone?
4832018-01-25T19:03:38 <wumpus> -> [on master] change version information -> clear out release notes
4842018-01-25T19:03:47 *** Randolf has joined #bitcoin-core-dev
4852018-01-25T19:04:10 <wumpus> 0.16 branch will be 0.16.0 (with release=true) master will be 0.16.99
4862018-01-25T19:04:13 <wumpus> cfields: sure
4872018-01-25T19:04:18 *** Lavonne89Schulis has quit IRC
4882018-01-25T19:04:23 <cfields> thanks
4892018-01-25T19:04:46 *** mxg has quit IRC
4902018-01-25T19:05:11 <wumpus> though maybe it can wait for 0.16.1 too, I don't know, it's only a local issue
4912018-01-25T19:06:14 <MarcoFalke> It's a major release. There is no way we will have only one rc
4922018-01-25T19:06:23 <MarcoFalke> Backport works as well
4932018-01-25T19:06:23 <jtimon> although not a huge bug, https://github.com/bitcoin/bitcoin/pull/12172 is a bugfix (and a simple one)...
4942018-01-25T19:06:27 <wumpus> right
4952018-01-25T19:06:46 <wumpus> please, we want to do the release, we're not going too add more stuff to 0.16.0 now unless absolutely critical
4962018-01-25T19:07:11 <jonasschnelli> yes... we did already last week... this week is release week. :)
4972018-01-25T19:07:24 <wumpus> it's the same story every week
4982018-01-25T19:07:30 <jonasschnelli> heh...
4992018-01-25T19:07:46 <wumpus> and as MarcoFalke says there's no way there's only going to be one rc
5002018-01-25T19:07:59 <wumpus> there are going to be problems that come up in rc1 and have to be fixed
5012018-01-25T19:08:10 *** mxg has joined #bitcoin-core-dev
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5032018-01-25T19:08:23 <jtimon> it's not like that +9-4 change is going to break anything, but ok
5042018-01-25T19:08:34 <MarcoFalke> and release notes to be written ...
5052018-01-25T19:08:56 <MarcoFalke> jtimon: It still needs review. I told you last week
5062018-01-25T19:09:00 *** Randolf has joined #bitcoin-core-dev
5072018-01-25T19:09:20 <jtimon> MarcoFalke: sure, it needs more review
5082018-01-25T19:09:59 <jtimon> anyway, never mind
5092018-01-25T19:10:05 <MarcoFalke> jtimon: I like it, but others need to like it as well
5102018-01-25T19:10:28 <meshcollider> Release notes for major releases are so much longer than point releases but I'll try and find time if noone else does
5112018-01-25T19:10:58 <MarcoFalke> meshcollider: Even doing half of it would help
5122018-01-25T19:10:58 <wumpus> maybe we could put it in the wiki again?
5132018-01-25T19:11:06 <MarcoFalke> oh right
5142018-01-25T19:11:13 <meshcollider> wumpus: yeah +1
5152018-01-25T19:11:25 <wumpus> #action put release 0.16 notes in wiki
5162018-01-25T19:11:27 <achow101> yes, let's do the wiki thing again
5172018-01-25T19:12:17 <BlueMatt> yes, #12266 needs review :/
5182018-01-25T19:12:18 <wumpus> and re: #12270 does anyone know the exact process there?
5192018-01-25T19:12:18 <gribble> https://github.com/bitcoin/bitcoin/issues/12266 | Move scheduler/threadGroup into common-init instead of per-app by TheBlueMatt · Pull Request #12266 · bitcoin/bitcoin · GitHub
5202018-01-25T19:12:20 <gribble> https://github.com/bitcoin/bitcoin/issues/12270 | Update chainTxData for 0.16 by laanwj · Pull Request #12270 · bitcoin/bitcoin · GitHub
5212018-01-25T19:12:22 <MarcoFalke> https://github.com/bitcoin-core/bitcoin-devwiki/wiki/0.16.0-Release-notes
5222018-01-25T19:12:43 <wumpus> the release notes are quite unclear on chainTxData
5232018-01-25T19:12:47 <BlueMatt> wumpus: maybe sipa can confirm, he's currently mid-giving-talk
5242018-01-25T19:12:59 <kanzure> git clone https://github.com/bitcoin-core/bitcoin-devwiki.wiki.git
5252018-01-25T19:13:03 <cfields> BlueMatt: is there q/a after?
5262018-01-25T19:13:09 <BlueMatt> lol
5272018-01-25T19:13:55 <kanzure> oh bpase scheduling
5282018-01-25T19:14:06 <cfields> BlueMatt: thanks for the fix, btw. taking a look.
5292018-01-25T19:14:21 <meshcollider> Are bpase talks recorded btw
5302018-01-25T19:14:28 <kanzure> site says videos will be posted later
5312018-01-25T19:15:49 <wumpus> any other topics?
5322018-01-25T19:16:12 <achow101> coin selection?
5332018-01-25T19:16:19 <achow101> (again)
5342018-01-25T19:16:31 <wumpus> #topic coin selection
5352018-01-25T19:16:40 <Murch> Currently listening to sipa @ BPASE :p
5362018-01-25T19:16:59 <achow101> I did some more simulations, this time with varying fee rates
5372018-01-25T19:17:02 <achow101> results here: https://github.com/bitcoin/bitcoin/pull/10637#issuecomment-359514676
5382018-01-25T19:17:07 <wumpus> I saw a new PR was openened about that #12257, haven't had time to look at it yet
5392018-01-25T19:17:09 <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 · GitHub
5402018-01-25T19:17:46 <achow101> the results don't seem to be very impressive though
5412018-01-25T19:18:00 <meshcollider> wumpus: that's pretty orthogonal I think, it's a privacy thing rather than an efficient selection thing
5422018-01-25T19:18:12 <wumpus> ok...
5432018-01-25T19:18:58 <achow101> I'm not sure of BnB is going to be much of an improvement over what we currently have
5442018-01-25T19:19:15 <achow101> s/of/that/
5452018-01-25T19:19:35 <achow101> at the very least, it doesn't do worse
5462018-01-25T19:19:49 <wumpus> that's already good if it is a win in runtime
5472018-01-25T19:20:09 <achow101> it actually runs a lot slower
5482018-01-25T19:20:12 *** AaronvanW has quit IRC
5492018-01-25T19:20:15 <meshcollider> Oh
5502018-01-25T19:20:21 <wumpus> ouch
5512018-01-25T19:20:39 <achow101> I noticed during the simulations that running BnB takes longer since it has to exhaust the search before it continues with the current algo
5522018-01-25T19:20:46 <morcos> Should we save this conversation for when Murch can join?
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5542018-01-25T19:21:04 <achow101> It seems to only be faster when it can find a solution, which is not all that frequent
5552018-01-25T19:21:59 <Murch> achow101: I just had a look at the results. How come that there were several hundred instances of BnB use but only one fewer change output created than without BnB?
5562018-01-25T19:22:47 <Murch> I think there is an unexpected behavior there.
5572018-01-25T19:23:07 <achow101> oh, that's strange
5582018-01-25T19:24:57 *** AaronvanW has quit IRC
5592018-01-25T19:26:08 <achow101> I will look into that
5602018-01-25T19:26:46 *** max123___ has quit IRC
5612018-01-25T19:27:21 <wumpus> thanks
5622018-01-25T19:27:22 <wumpus> any other topics?
5632018-01-25T19:27:36 <Chris_Stewart_5> achow101: It seems like the algo would obviously be slower if it reverts to the old algo?
5642018-01-25T19:27:45 <jtimon> perhaps a short meeting today?
5652018-01-25T19:27:46 <achow101> Chris_Stewart_5: yes
5662018-01-25T19:28:01 <meshcollider> jtimon: yes seems sipa's talk has stolen the show today :)
5672018-01-25T19:28:03 <achow101> Chris_Stewart_5: logically, reverting means that it's running more code, so it kinda has to be slower
5682018-01-25T19:28:04 <Chris_Stewart_5> so the high failure rate is the main concern?
5692018-01-25T19:28:20 <jtimon> meshcollider: oh, what talk?
5702018-01-25T19:28:39 <meshcollider> jtimon: at bpase
5712018-01-25T19:28:40 <wumpus> jtimon: yep
5722018-01-25T19:28:54 <wumpus> let's review stuff for 0.16 after the talk :)
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5742018-01-25T19:29:55 <jtimon> oh, I'll wait for the video
5752018-01-25T19:30:28 <wumpus> #endmeeting
5762018-01-25T19:30:28 <lightningbot> Meeting ended Thu Jan 25 19:30:28 2018 UTC. Information about MeetBot at http://wiki.debian.org/MeetBot . (v 0.1.4)
5772018-01-25T19:30:28 <lightningbot> Minutes: http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-01-25-19.00.html
5782018-01-25T19:30:28 <lightningbot> Minutes (text): http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-01-25-19.00.txt
5792018-01-25T19:30:28 <lightningbot> Log: http://www.erisian.com.au/meetbot/bitcoin-core-dev/2018/bitcoin-core-dev.2018-01-25-19.00.log.html
5802018-01-25T19:30:45 <jonasschnelli> Where is sipas talk?
5812018-01-25T19:30:59 <Chris_Stewart_5> is bpase live on youtube?
5822018-01-25T19:31:08 <meshcollider> https://cyber.stanford.edu/bpase18
5832018-01-25T19:31:24 <instagibbs> murchandamus, achow101 yes those results look really strange
5842018-01-25T19:31:41 <meshcollider> Chris_Stewart_5: I couldn't find it, kanzure said they'll be posted later
5852018-01-25T19:31:46 <instagibbs> now that i think about it, highly improbably? unless classical selection ends up doing no-change solution a lot more somehow
5862018-01-25T19:32:08 <instagibbs> or BnB only finds the dumb solutions that classic selection would have found
5872018-01-25T19:32:32 <achow101> instagibbs: murchandamus perhaps review what I'm using to simulate?
5882018-01-25T19:32:35 <achow101> It's here: https://github.com/achow101/bitcoin/tree/bnb-simulate
5892018-01-25T19:32:51 <meshcollider> Also the coredev channel is invite only now? I need an invite to it :)
5902018-01-25T19:32:55 <sipa> meshcollider: are you at bpase?
5912018-01-25T19:32:58 <achow101> I may have screwed up how I count things
5922018-01-25T19:33:05 <achow101> meshcollider: yes, it's invite only now
5932018-01-25T19:33:11 <meshcollider> sipa: no unfortunately not
5942018-01-25T19:33:14 <instagibbs> achow101, print out how often core selection gets no change solution, as a start
5952018-01-25T19:33:28 <sipa> i believe videos will be online later
5962018-01-25T19:33:29 <instagibbs> in both scenarios, with and without bnb
5972018-01-25T19:33:29 <jonasschnelli> thanks
5982018-01-25T19:34:19 <kanzure> it's surprisingly difficult to transcribe without being there and also without audio/video
5992018-01-25T19:34:28 <kanzure> i can only guess what was said, but i think i could have >20% accuracy
6002018-01-25T19:34:36 <meshcollider> kanzure: are you op in the coredev channel
6012018-01-25T19:34:45 <sipa> kanzure: lol!
6022018-01-25T19:34:45 <kanzure> nah, i'll ping someone for you
6032018-01-25T19:34:51 <achow101> meshcollider: ask jnewbery or morcos
6042018-01-25T19:34:58 *** ChanServ sets mode: +o sipa
6052018-01-25T19:35:02 <sipa> i haz op
6062018-01-25T19:35:15 <sipa> oh, coredev channel, not core-dev
6072018-01-25T19:35:16 <sipa> nvm
6082018-01-25T19:35:19 <kanzure> meshcollider: moderator says you are good under meshcollider name... pm me the channel you think you're joining.
6092018-01-25T19:35:21 *** sipa sets mode: -o sipa
6102018-01-25T19:35:31 <achow101> sipa: aren't you supposed to be giving a talk?
6112018-01-25T19:35:38 <sipa> achow101: just finished
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6132018-01-25T19:35:54 <kanzure> irc on stage is fine
6142018-01-25T19:35:56 <kanzure> standard procedure
6152018-01-25T19:35:58 <Chris_Stewart_5> lol
6162018-01-25T19:36:09 <Chris_Stewart_5> priorties! There is a core-dev meeting!
6172018-01-25T19:36:24 <kanzure> i assume it was a musig talk
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6192018-01-25T19:36:29 <sipa> kanzure: nooe!
6202018-01-25T19:36:32 <sipa> nope!
6212018-01-25T19:36:45 <kanzure> accuracy going down.. :-)
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6232018-01-25T19:38:13 <sipa> it was on bellare-neven multi-signatures
6242018-01-25T19:38:22 <achow101> so almost musig
6252018-01-25T19:38:47 <sipa> (and generally the advantages of schnorr-like signature schemes, including the ability to use musig to aggregate keys)
6262018-01-25T19:39:15 <kanzure> ah okay, these things http://diyhpl.us/wiki/transcripts/bitcoin-core-dev-tech/2017-09-06-signature-aggregation/
6272018-01-25T19:40:02 <sipa> yup
6282018-01-25T19:40:59 <cfields> kanzure: thanks a ton for that, btw. There's no wikipedia entry for BN sigs, so I always end up hitting that link when I google for the paper
6292018-01-25T19:41:13 <kanzure> yep no problem
6302018-01-25T19:42:49 <kanzure> really weird how a lot of this stuff just gets lost
6312018-01-25T19:42:51 <jonasschnelli> BlueMatt: GuessVerificationProgress needs cs_main, right? (accessing pindex->nChainTx )
6322018-01-25T19:43:47 <jojeyh> sipa, is it possible to see these talks live ?
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6342018-01-25T19:43:59 <jojeyh> or even a recording i guess
6352018-01-25T19:44:03 <sipa> kanzure: at RWC we ran into Neven, who sounded very excited that someone may actually use his scheme :)
6362018-01-25T19:44:05 *** meshcollider has joined #bitcoin-core-dev
6372018-01-25T19:44:14 <sipa> jojeyh: there will be a recording later
6382018-01-25T19:44:20 <jojeyh> danke
6392018-01-25T19:44:22 <kanzure> sipa: has he reviewed the paper yet?
6402018-01-25T19:45:16 <BlueMatt> jonasschnelli: yup
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6482018-01-25T20:01:14 <instagibbs> gmaxwell, morcos some not completely thought out discussion on fee bumping/transaction replacement #12271 . I haven't really seen a good central location for discussion, so I continue re-inventing the wheel
6492018-01-25T20:01:16 <gribble> https://github.com/bitcoin/bitcoin/issues/12271 | Improving fee bumping in Core · Issue #12271 · bitcoin/bitcoin · GitHub
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6642018-01-25T20:41:22 <luke-jr> :o "Two new instructions (addex and vmsumudm) introduced to accelerate arbitrary-precision integer arithmetic, and specifically to accelerate Blockchainâs implementation of elliptical curve encryption signature algorithm. The OV bit is employed to provide an additional, independent carry status bit, allowing software to parallelize carry propagation."
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6672018-01-25T20:46:19 <wumpus> luke-jr: whoa, interesting
6682018-01-25T20:48:09 <achow101> luke-jr: what is that for?
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6702018-01-25T20:49:27 <wumpus> powerpc 9 ISA apparently
6712018-01-25T20:50:39 <luke-jr> achow101: POWER9
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6742018-01-25T20:52:49 <luke-jr> "Add Extended using alternate carry bit Z23-form" and "Vector Multiply-Sum Unsigned Doubleword Modulo VA-form"
6752018-01-25T20:54:25 <luke-jr> "The unsigned integer value in doubleword element 0 of VR[VRA] is multiplied by the unsigned integer value in doubleword element 0 of VR[VRB] to produce a 128-bit product. The unsigned integer value in doubleword element 1 of VR[VRA] is multiplied by the unsigned integer value in doubleword element 1 of VR[VRB] to produce a 128-bit product. The two 128-bit unsigned integer products and the 128-bit unsigned integer in VR[VRC] are summed.
6762018-01-25T20:54:26 <wumpus> vmsumudm seems SIMD 2x 64*64 -> 128 bit multiplication, where the two results are added to a third 128 bit value
6772018-01-25T20:54:27 <luke-jr> The low-order 128 bits of the sum are placed into VR[VRT]. Any carry out or overflow status is discarded."
6782018-01-25T20:55:10 <luke-jr> hopefully this is compatible with libsecp256k1's existing optimisations
6792018-01-25T20:55:52 <wumpus> that seems quite useful for the kind off mult-sum operations in secp256k1 secp256k1_fe_mul_inner and such
6802018-01-25T20:55:54 <luke-jr> https://wiki.raptorcs.com/w/images/c/cb/PowerISA_public.v3.0B.pdf
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6822018-01-25T20:57:58 * luke-jr wonders if it is still useful for the new aggregation-capable signature scheme
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6882018-01-25T21:02:32 <wumpus> I'd be surprised if the low level operations are not still the same
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