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 24 2017-11-01T03:25:56  <earlz> jonasschnelli: not sure how to compile bitcoin-qt to be dynamically linked without building it on device.. and building on device would take days if it's even possible. I got a compiler error that the ARM compiler wasn't supported for building Qt through gitian, so guess I'm just out of luck on it
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 28 2017-11-01T04:09:18  <jonasschnelli> earlz: Indeed. ARM & QT is a large rabbit hole...
 29 2017-11-01T04:10:42  <luke-jr> why? :/
 30 2017-11-01T04:11:30  <luke-jr> should be strictly easier than Windows/Mac
 31 2017-11-01T04:11:48  <luke-jr> unless you're trying to do an Android/iOS build or something
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 35 2017-11-01T04:33:05  <earlz> I'm focused on raspberry pi specifically
 36 2017-11-01T04:33:27  <earlz> but I'd like to do it all cross-compile, not on device
 37 2017-11-01T04:33:53  <earlz> But unsure how to get gitian or the depends system to cooperate with that
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 47 2017-11-01T06:34:44  <bitcoin-git> [bitcoin] jonasschnelli opened pull request #11590: [Wallet] always show help-line of wallet encryption calls (master...2017/10/enc_wallet_help) https://github.com/bitcoin/bitcoin/pull/11590
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 57 2017-11-01T07:58:23  <wumpus> ARM and QT5 works great, a lot of embedded devices vendors use that combination, the problem (with regard to bitcoin) is that it's not really standardized, so one mgiht be using qt w/ kms backend, the other with wayland, the other with X11, there's no one-size-fits-all static executable
 58 2017-11-01T07:58:44  <wumpus> so it would be pretty pointless to distrubute them
 59 2017-11-01T07:59:29  <wumpus> with your own cross-compile environment you can certainly build bitcoin-qt for ARM
 60 2017-11-01T07:59:59  <wumpus> but it's quite specifific to the device
 61 2017-11-01T08:01:06  <wumpus> or at least what libraries and versions and such are in its buildroot
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 64 2017-11-01T08:02:49  <wumpus> you might have luck changing qt to dynamically link, but you'd have to be sure to have a compatible version of qt5 on the device - ideally you'd build against the specific qt5 library that is on the device
 65 2017-11-01T08:04:48  <wumpus> if both the host and device are ubuntu you can "cheat" by installing the qt5-dev:armhf package on the host, the cross-build chain should automatically pick that up
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 70 2017-11-01T08:36:37  <luke-jr> wumpus: ideally you'd build against some minimum required Qt.. Qt is good about backward binary compat, IIRC
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 77 2017-11-01T09:19:50  <wumpus> luke-jr: yeah that'd work, certainly in our case you'd lose nothing with that approach, we don't use any actual qt5 features, let alone new ones...
 78 2017-11-01T09:20:42  <jouke> win 32
 79 2017-11-01T09:20:45  <wumpus> could bulid dynamically against the first sane version of qt5. We used to do something like that for qt4 IIRC
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 83 2017-11-01T09:39:16  <luke-jr> wumpus: this would fix the Ubuntu issues as well, perhaps
 84 2017-11-01T09:39:43  <luke-jr> wumpus: we don't even need the Qt5 we build against to be completely sane either since we won't distribute that.. just binary-compatible
 85 2017-11-01T09:42:36  <wumpus> I remember there was a good reason we switched to statically linking qt, there were qt incompatiblity issues on some platforms
 86 2017-11-01T09:43:01  <wumpus> I think there was at least some security feature on one distro that affected qt's binary compatiblity
 87 2017-11-01T09:44:13  <wumpus> distribution-agnostic GUI software on linux is an unsolved problem, the only things that seem to work, unfortunately (because they're big hammers) are either statically linking or shipping the whole whopping library chain (most linux games do this)
 88 2017-11-01T09:46:58  <luke-jr> the latter is better IMO
 89 2017-11-01T09:47:03  <wumpus> and it becomes even more involved when embedded development of any form is involved.
 90 2017-11-01T09:47:24  <luke-jr> at least with that approach, users can choose between using the bundled libs or using the system ones
 91 2017-11-01T09:47:45  <wumpus> linux is an operating system where things are built from source, either by the user themselves or their distro/buildroot
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 93 2017-11-01T09:48:36  <wumpus> distributing binaries for linux is really a no-go, and so is trying to provide any one-size-fits-all linux cross target
 94 2017-11-01T09:48:47  <luke-jr> dunno, for Android and iOS it might be possible
 95 2017-11-01T09:48:48  <wumpus> our current hacks work pretty well given that
 96 2017-11-01T09:49:27  <wumpus> yes, I don't consider android or iOS 'linux' for this intent. THey have heavily standardized API specifications.
 97 2017-11-01T09:49:46  <luke-jr> ABCore is nice, but loses the whole GUI :P
 98 2017-11-01T09:49:56  <wumpus> for 'open' linux there's just too much drift
 99 2017-11-01T09:50:05  <wumpus> too much custom patching
100 2017-11-01T09:50:07  <wumpus> and so on
101 2017-11-01T09:50:28  <wumpus> which is good for freedom but not for binary software :-) (which could be considered a feature in some regards)
102 2017-11-01T09:51:04  <wumpus> yeah, user expectation wise qt isn't that suited to building android GUIs
103 2017-11-01T09:51:22  <wumpus> bitcoin-qt's gui would be kind of weird on a mobile device
104 2017-11-01T09:51:24  <luke-jr> the Qt example in Play store didn't seem that bad :P
105 2017-11-01T09:51:36  <wumpus> probably the fancy qml qt5 stuff?
106 2017-11-01T09:51:43  <wumpus> not 'widgets' that we use
107 2017-11-01T09:51:45  <luke-jr> dunno, does QML not use the same code as normal GUI?
108 2017-11-01T09:51:55  <wumpus> no, it's completely different
109 2017-11-01T09:51:57  <luke-jr> I would have expected QML was just an interface to widgets
110 2017-11-01T09:51:59  <luke-jr> that sucks
111 2017-11-01T09:52:10  * luke-jr misses TrollTech
112 2017-11-01T09:53:01  <wumpus> qml is a graphics markup language, a kind of 2D scene graph, with lots of plugins for animation, video, audio, touch gestures, etc
113 2017-11-01T09:53:22  <luke-jr> I thought it did widgets too
114 2017-11-01T09:53:24  <wumpus> its' erally different from widgets which is aimed at old-style GUIs (say, desktop spreadsheets)
115 2017-11-01T09:53:56  <wumpus> going to QML would be a complete redesign of the GUI
116 2017-11-01T09:54:06  <luke-jr> Widgets don't look native on Android?
117 2017-11-01T09:54:23  <wumpus> which would be ok with me, but I just don't know anything about that side of GUI design, nor do I have the time
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119 2017-11-01T09:54:36  <luke-jr> .. ironic coming from the original GUI dev :P
120 2017-11-01T09:54:50  <luke-jr> but tbh, I probably wouldn't want to change to QML
121 2017-11-01T09:54:57  <luke-jr> I prefer doing the entire GUI in code
122 2017-11-01T09:55:00  <wumpus> I come from opengl driver dev, rendering backends, not frontends :p
123 2017-11-01T09:55:27  <luke-jr> sure, I just meant that you wrote bitcoin-qt entirely yourself
124 2017-11-01T09:55:32  <luke-jr> initially
125 2017-11-01T09:55:45  <wumpus> oh sure I've used qt a lot in the past, mostly for tooling
126 2017-11-01T09:56:03  <wumpus> that's old-style GUIs though, I meant I don't get QML
127 2017-11-01T09:56:23  <luke-jr> old-style GUIs ftw
128 2017-11-01T09:57:46  <wumpus> I agree (but we're a dying breed)
129 2017-11-01T09:59:40  <wumpus> in any case my point was that qt-for-mobile is mostly aimed at QML, widgets are not a good fit for what peopel expect w/ touch interfaces
130 2017-11-01T10:00:00  <luke-jr> that's disappointing to hear
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132 2017-11-01T10:02:02  <wumpus> it would certainly be possible to port the current GUI as-is to android, but I'd expect that'd mostly result in complaints
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138 2017-11-01T10:27:27  <tevrizci> hi
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142 2017-11-01T10:28:48  <wumpus> hi
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146 2017-11-01T10:59:24  <bitcoin-git> [bitcoin] fanquake closed pull request #11587: Fix warnings when building with -Wthread-safety-analysis (master...–Wthread-safety-analysis) https://github.com/bitcoin/bitcoin/pull/11587
147 2017-11-01T10:59:36  <fanquake> wumpus are you still around?
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151 2017-11-01T11:14:03  <promag> a bit late for the qml chat
152 2017-11-01T11:14:26  <promag> > qml is a graphics markup language, a kind of 2D scene graph, with lots of plugins for animation, video, audio, touch gestures, etc
153 2017-11-01T11:15:15  <promag> maybe it started in that context, but qml is a declarative language with a javascript engine
154 2017-11-01T11:15:55  <promag> it is used in other contexts, for instance, qbs which is the most recent building system
155 2017-11-01T11:17:45  <promag> anyway, I though that if we want to split the wallet UI and add IPC then it would be a great opportunity to reimplement the UI in QtQuick
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157 2017-11-01T11:20:40  <luke-jr> promag: I don't see what reimplementing the wallet has to do with splitting it out
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159 2017-11-01T11:26:24  <promag> to change the current wallet from widgets to qtquick would take several PR's (which would sit there for a long time)
160 2017-11-01T11:27:04  <promag> dunno if the IPC PR from ryanofsky is going forward
161 2017-11-01T11:27:38  <promag> both require lots of changes to the wallet ui code
162 2017-11-01T11:28:18  <promag> that's why I think adding IPC to glue a new wallet ui is probably easier
163 2017-11-01T11:29:12  <promag> we could have both bitcoin-qt and bitcoin-quick and later drop support for the first
164 2017-11-01T11:29:42  <promag> anyway, moving to qtquick is something IMHO we should plan
165 2017-11-01T11:30:01  <luke-jr> why? what are the benefits?
166 2017-11-01T11:32:08  <promag> modern ui, hw accelerated, adapts easily to non-desktop platforms, qt is pushing to that direction too, it is way easier to read and understand the code, it forces the mvc pattern..
167 2017-11-01T11:32:34  <promag> not something we should do for the next release or 2
168 2017-11-01T11:32:53  <fanquake> What's the minimum supported qt version?
169 2017-11-01T11:32:54  <luke-jr> sounds mostly subjective. C++ Qt code is plenty readable.
170 2017-11-01T11:33:01  <promag> qt5
171 2017-11-01T11:33:09  <fanquake> 5. what?
172 2017-11-01T11:33:14  <fanquake> 5.0
173 2017-11-01T11:34:06  <promag> depends which components we plsn to use
174 2017-11-01T11:35:31  <fanquake> Anything introduced earlier than 5.2 should be ok to use.
175 2017-11-01T11:36:38  <fanquake> That is atleast the minimum for qt, because of an osx hack. Although it could be > now.
176 2017-11-01T11:36:56  <promag> luke-jr: I've used both widgets and qtquick a lot, and from my experience with qtquick the code is more expressive and easy to read
177 2017-11-01T11:38:32  <fanquake> promag do you have a good open source project that's using it as an example to look at?
178 2017-11-01T11:39:35  <promag> mine no, I can point to some products that were using native code and moved to qtquick
179 2017-11-01T11:40:17  <promag> qt has a lot of sample code
180 2017-11-01T11:42:14  <luke-jr> I'm not sure embedding a JS engine in a wallet is a good idea :/
181 2017-11-01T11:44:48  <promag> my point is, it's not we should do for the current ui, but we could do if something requires a great ui refactor
182 2017-11-01T11:45:11  <luke-jr> hmm
183 2017-11-01T11:45:18  <promag> luke-jr: why? overhead or security
184 2017-11-01T11:45:30  <luke-jr> security mainly
185 2017-11-01T11:45:45  <luke-jr> overhead may be a consideration for mobile too, I guess
186 2017-11-01T11:46:16  <luke-jr> otoh, if we're refactoring, we can isolate the GUI from the wallet itself, so maybe less of an issue
187 2017-11-01T11:46:51  <promag> right
188 2017-11-01T11:47:37  <luke-jr> but not a non-issue either, since the GUI obviously needs to be able to make transactions
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190 2017-11-01T11:48:52  <promag> anyway, I could write a prototype if it's something we all agree on seeing
191 2017-11-01T11:49:57  <luke-jr> promag: can C++ code contruct the GUI still with QtQuick?
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193 2017-11-01T11:51:13  <promag> you can manipulate the "DOM" in c++
194 2017-11-01T11:51:27  <promag> but that is pretty ugly on the qml land
195 2017-11-01T11:51:57  <luke-jr> I found it convenient to implement policy options in the GUI with format strings
196 2017-11-01T11:51:58  <promag> usually you implement the model(s) in c++ and the view(s) in qml
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198 2017-11-01T11:52:29  <luke-jr> tr("Require transaction fees to be at least %s per kB higher than transactions they are replacing.")
199 2017-11-01T11:52:38  <luke-jr> where %s becomes the option control
200 2017-11-01T11:53:30  <luke-jr> not sure QML can do anything similar
201 2017-11-01T11:53:31  <promag> is this what we want: not see http://doc.qt.io/qt-5/qtquick-internationalization.html#4-use-op-op-x-to-insert-parameters-into-a-string
202 2017-11-01T11:53:34  <gribble> https://github.com/bitcoin/bitcoin/issues/4 | Export/Import wallet in a human readable, future-proof format · Issue #4 · bitcoin/bitcoin · GitHub
203 2017-11-01T11:53:49  <promag> s/we/you
204 2017-11-01T11:53:56  <luke-jr> no, that's just inserting stuff
205 2017-11-01T11:54:13  <luke-jr> in my case, %s is turning into a spinbox, inputbox, etc
206 2017-11-01T11:55:02  <promag> we mean the text to translate has something that is binded to a combobox selection?
207 2017-11-01T11:55:12  <promag> err, s/we/you
208 2017-11-01T11:55:37  <luke-jr> yes
209 2017-11-01T11:55:50  <promag> text: qsTr("File %1 of %2").arg(combobox.selectedText).arg(total)
210 2017-11-01T11:55:56  <luke-jr> no :p
211 2017-11-01T11:56:14  <luke-jr> the combobox (or whatever type) would literally be inside the string
212 2017-11-01T11:56:33  * luke-jr grabs a screenshot
213 2017-11-01T11:59:56  <luke-jr> promag: http://luke.dashjr.org/tmp/screenshots/Screenshot_20171101_115900.png
214 2017-11-01T12:01:30  <luke-jr> I suppose the trick to do this might be to implement a special widget *for* QML that can do it..
215 2017-11-01T12:01:59  <promag> to do what?
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220 2017-11-01T12:03:48  <promag> everything there can be done with out-of-the-box qtquick, not sure what you mean
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222 2017-11-01T12:09:14  <promag> ah, but how do you do that with widgets? horizontal layout with label + combo + label?
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224 2017-11-01T12:39:58  <wumpus> fanquake: yes
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226 2017-11-01T12:44:23  <wumpus> promag: luke-jr: FWIW javascript of any kind in bitcoin core scares me, even in the GUI, I know this is not like dragging in a browser (it's not html based, nor is it meant as a sandbox for untrusted code) but it's still such a huge exploitable component
227 2017-11-01T12:45:00  <wumpus> in addition to javascript just being a terrible language
228 2017-11-01T12:45:56  <wumpus> I'd loathe to maintain that or even have to review changes to it
229 2017-11-01T12:50:04  <wumpus> but the same argument would hold for e.g. integrating a lua or python scripting engine
230 2017-11-01T12:50:18  <wumpus> even though I like those languages :-)
231 2017-11-01T12:59:04  <fanquake> wumpus Cool. I think #11442 is ready to go.
232 2017-11-01T12:59:06  <gribble> https://github.com/bitcoin/bitcoin/issues/11442 | [Docs] Update OpenBSD Build Instructions for OpenBSD 6.2 by fanquake · Pull Request #11442 · bitcoin/bitcoin · GitHub
233 2017-11-01T12:59:44  <wumpus> fanquake: yes it is! sorry, lost track of it a bit
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235 2017-11-01T13:01:15  <fanquake> wumpus no worries. I was half waiting for someone else to test it, but I think it's better to just replace the outdated instructions.
236 2017-11-01T13:01:36  <fanquake> Also need you to glance over #11573 given that you've pretty much maintained our changes to that code.
237 2017-11-01T13:01:37  <gribble> https://github.com/bitcoin/bitcoin/issues/11573 | [Util] Update tinyformat.h by fanquake · Pull Request #11573 · bitcoin/bitcoin · GitHub
238 2017-11-01T13:02:27  <bitcoin-git> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/8335cb478183...e8f3c88133b7
239 2017-11-01T13:02:27  <bitcoin-git> bitcoin/master 9d30f54 fanquake: [Docs] Update OpenBSD Build Instructions for OpenBSD 6.2
240 2017-11-01T13:02:28  <bitcoin-git> bitcoin/master e8f3c88 Wladimir J. van der Laan: Merge #11442: [Docs] Update OpenBSD Build Instructions for OpenBSD 6.2...
241 2017-11-01T13:03:05  <bitcoin-git> [bitcoin] laanwj closed pull request #11442: [Docs] Update OpenBSD Build Instructions for OpenBSD 6.2 (master...openbsd-doc-update) https://github.com/bitcoin/bitcoin/pull/11442
242 2017-11-01T13:05:05  <bitcoin-git> [bitcoin] laanwj pushed 1 new commit to 0.15: https://github.com/bitcoin/bitcoin/commit/cf18f4289911c657eb876d91dee055db807870ad
243 2017-11-01T13:05:06  <bitcoin-git> bitcoin/0.15 cf18f42 fanquake: [Docs] Update OpenBSD Build Instructions for OpenBSD 6.2...
244 2017-11-01T13:05:33  <fanquake> #11571 is also a trivial merge.
245 2017-11-01T13:05:35  <gribble> https://github.com/bitcoin/bitcoin/issues/11571 | Fixed a couple small grammatical errors. by BitsInMyBlood · Pull Request #11571 · bitcoin/bitcoin · GitHub
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247 2017-11-01T13:06:48  <wumpus> hah the compiler checks for // Falls through comments now?
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249 2017-11-01T13:07:17  <fanquake> wumpus good explainer here https://developers.redhat.com/blog/2017/03/10/wimplicit-fallthrough-in-gcc-7/
250 2017-11-01T13:07:42  <wumpus> fanquake: thanks
251 2017-11-01T13:07:59  <wumpus> anyhow the change looks obviously ok, just adds sanity checking
252 2017-11-01T13:09:47  <fanquake> #11565 is also ready to go.
253 2017-11-01T13:09:49  <gribble> https://github.com/bitcoin/bitcoin/issues/11565 | Make listsinceblock refuse unknown block hash by ryanofsky · Pull Request #11565 · bitcoin/bitcoin · GitHub
254 2017-11-01T13:10:56  <wumpus> ah so gcc added recognition of fallthrough comments, as placeholder for in c++17 we get an explicit [[fallthrough]] marker
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257 2017-11-01T13:11:01  <wumpus> makes sense
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260 2017-11-01T13:12:41  <bitcoin-git> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/e8f3c88133b7...2631d55f61cd
261 2017-11-01T13:12:41  <bitcoin-git> bitcoin/master 60b98f8 fanquake: [Util] Update tinyformat.h...
262 2017-11-01T13:12:42  <bitcoin-git> bitcoin/master 2631d55 Wladimir J. van der Laan: Merge #11573: [Util] Update tinyformat.h...
263 2017-11-01T13:13:19  <bitcoin-git> [bitcoin] laanwj closed pull request #11573: [Util] Update tinyformat.h (master...pull-upstream-tinyformat) https://github.com/bitcoin/bitcoin/pull/11573
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266 2017-11-01T13:13:54  <bitcoin-git> [bitcoin] laanwj closed pull request #11565: Make listsinceblock refuse unknown block hash (master...pr/since) https://github.com/bitcoin/bitcoin/pull/11565
267 2017-11-01T13:16:21  <fanquake> #11550 Is also mergeable, unless there are some more backports to be added. A new PR can always be opened later anyways.
268 2017-11-01T13:16:23  <gribble> https://github.com/bitcoin/bitcoin/issues/11550 | [0.15.1] qa: Backports by MarcoFalke · Pull Request #11550 · bitcoin/bitcoin · GitHub
269 2017-11-01T13:16:48  <wumpus> I was confused about 0.15.1 versus 0.15.0.2 there
270 2017-11-01T13:17:13  <fanquake> Should it make a difference if it's ending up in the 0.15 branch?
271 2017-11-01T13:17:15  <wumpus> so if they are 0.15.1 backports they shouldn't go in yet
272 2017-11-01T13:17:25  <bitcoin-git> [bitcoin] laanwj pushed 1 new commit to 0.15: https://github.com/bitcoin/bitcoin/commit/7d4546f17dca84928bd2b6d1e2588b673c237321
273 2017-11-01T13:17:25  <bitcoin-git> bitcoin/0.15 7d4546f Russell Yanofsky: Make listsinceblock refuse unknown block hash...
274 2017-11-01T13:17:44  <wumpus> I don't know - usually not, I guess
275 2017-11-01T13:17:53  <wumpus> unless it's segwit wallet functionality then it shoudl be held up
276 2017-11-01T13:19:30  <fanquake> wumpus yea ok, it can wait then.
277 2017-11-01T13:20:10  <wumpus> it's just testing stuff so as it passes it can get in already
278 2017-11-01T13:20:37  <fanquake> Don't think it will create any rebase issues either
279 2017-11-01T13:20:55  <wumpus> if anything it makes rebasing easier by making 0.15 more like master :)
280 2017-11-01T13:22:04  <bitcoin-git> [bitcoin] laanwj closed pull request #11550: [0.15.1] qa: Backports (0.15...Mf1710-0151qaBackports) https://github.com/bitcoin/bitcoin/pull/11550
281 2017-11-01T13:23:03  <bitcoin-git> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/e1f6a2a801a0...c95832da87ac
282 2017-11-01T13:23:04  <bitcoin-git> bitcoin/master f927ee1 Christian Gentry: Fixed a couple small grammatical errors....
283 2017-11-01T13:23:04  <bitcoin-git> bitcoin/master c95832d Wladimir J. van der Laan: Merge #11571: Fixed a couple small grammatical errors....
284 2017-11-01T13:23:38  <bitcoin-git> [bitcoin] laanwj closed pull request #11571: Fixed a couple small grammatical errors. (master...patch-1) https://github.com/bitcoin/bitcoin/pull/11571
285 2017-11-01T13:24:15  <fanquake> Just checking for anything else that is ready to go.
286 2017-11-01T13:24:59  <fanquake> Maybe #11511 , I feel like we are going in circles a bit with the EXIT_CODE stuff though.
287 2017-11-01T13:25:01  <gribble> https://github.com/bitcoin/bitcoin/issues/11511 | [Init] Remove redundant exit(EXIT_FAILURE) instances and replace with return false by donaloconnor · Pull Request #11511 · bitcoin/bitcoin · GitHub
288 2017-11-01T13:25:14  <fanquake> They seem to get added, then removed, then added again.
289 2017-11-01T13:25:23  <wumpus> fanquake: yeah same feeling here, it didn't occur to me as terribly relevant
290 2017-11-01T13:25:44  <wumpus> but as it has ACKs, I"m fine with merging it
291 2017-11-01T13:25:55  <luke-jr> ‎[12:09:14] ‎<‎promag‎>‎ ah, but how do you do that with widgets? horizontal layout with label + combo + label? <-- yes, autogenerated from the (post-translated) strign
292 2017-11-01T13:26:48  <bitcoin-git> [bitcoin] laanwj pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/c95832da87ac...db2f83ed463b
293 2017-11-01T13:26:48  <bitcoin-git> bitcoin/master b296bf1 donaloconnor: Init: Remove redundant exit(EXIT_FAILURE) instances and replace with return false
294 2017-11-01T13:26:49  <bitcoin-git> bitcoin/master db2f83e Wladimir J. van der Laan: Merge #11511: [Init] Remove redundant exit(EXIT_FAILURE) instances and replace with return false...
295 2017-11-01T13:27:05  <bitcoin-git> [bitcoin] practicalswift opened pull request #11591: wallet: Add missing cs_wallet locks in GetAvailableCredit/GetAvailableWatchOnlyCredit/CreateWalletFromFile (master...cs_wallet) https://github.com/bitcoin/bitcoin/pull/11591
296 2017-11-01T13:27:24  <bitcoin-git> [bitcoin] laanwj closed pull request #11511: [Init] Remove redundant exit(EXIT_FAILURE) instances and replace with return false (master...161017_refactor_AppInit) https://github.com/bitcoin/bitcoin/pull/11511
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299 2017-11-01T13:35:08  <fanquake> Seems like the windows instructions need updating again already. Should we just be providing instructions for the latest release?
300 2017-11-01T13:35:43  <fanquake> Having multiple different sets of instructions just for enabling the same feature seems un-ideal
301 2017-11-01T13:36:32  <fanquake> I'm also not a great fan of 11438, seems like it just opens up lots of opportunities for miscompilation
302 2017-11-01T13:39:35  <fanquake> Although it has been simplified quite a bit now.
303 2017-11-01T13:42:35  <bitcoin-git> [bitcoin] laanwj pushed 7 new commits to master: https://github.com/bitcoin/bitcoin/compare/db2f83ed463b...cffa5ee132f3
304 2017-11-01T13:42:36  <bitcoin-git> bitcoin/master 3b4ac43 Matt Corallo: Rewrite p2p-acceptblock in preparation for slight behavior changes...
305 2017-11-01T13:42:36  <bitcoin-git> bitcoin/master 3d9c70c Matt Corallo: Stop always storing blocks from whitelisted peers...
306 2017-11-01T13:42:37  <bitcoin-git> bitcoin/master 932f118 Matt Corallo: Accept unrequested blocks with work equal to our tip...
307 2017-11-01T13:43:06  <bitcoin-git> [bitcoin] laanwj closed pull request #11531: Check that new headers are not a descendant of an invalid block (more effeciently) (master...2017-10-cache-invalid-indexes) https://github.com/bitcoin/bitcoin/pull/11531
308 2017-11-01T13:50:10  <BlueMatt> yeesh, can I get some postumous acks on that one ^
309 2017-11-01T13:54:28  <LumberCartel> That looks like a good idea.
310 2017-11-01T13:55:56  <wumpus> fanquake: yeah... tend to agree one maintained way that works is better than 10 different ways different people prefer that work a bit
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312 2017-11-01T14:01:37  <wumpus> I've long since given up getting people to agree, the only request I make is that cross-building for windows on 16.04 should be heavily discouraged because of the stack protector issue
313 2017-11-01T14:02:09  <wumpus> it's potentially very dangerous
314 2017-11-01T14:03:29  <wumpus> but in any case it results in broken executables so itt's a waste of time
315 2017-11-01T14:03:32  <LumberCartel> I should clarify -- I was commenting that 11531 looks like a good idea.  I think that improving ways to reduce or eliminate the effective of DoS attacks always a good idea.
316 2017-11-01T14:05:27  <wumpus> yes, it is (if it works, please help review the code)
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320 2017-11-01T14:16:39  <bitcoin-git> [bitcoin] MarcoFalke opened pull request #11592: [qa] 0.15.0.2: Fix silent merge conflict (assert_raises_rpc_error) (0.15...Mf1711-qa01502) https://github.com/bitcoin/bitcoin/pull/11592
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333 2017-11-01T14:56:43  <xinxi> Will the US regulate Bitcoin development while it’s going to regulate Bitcoin derivatives?
334 2017-11-01T14:56:50  <xinxi> What do you guys think?
335 2017-11-01T14:57:47  <wumpus> no political discussion here please, use #bitcoin instead
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352 2017-11-01T16:02:07  <karelb> is there ETA for 0.15.0.2?
353 2017-11-01T16:03:33  <karelb> not exact date, just if it will be this week or before 2x at all etc (yeah I know ETA questions are annoying :))
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356 2017-11-01T16:11:35  <sipa> karelb: "soon"
357 2017-11-01T16:11:39  <sdaftuar> cfields: i just commented in #11560 -- i'd like to undo the change to looping on mapNodeState vs ForEachNode
358 2017-11-01T16:11:42  <gribble> https://github.com/bitcoin/bitcoin/issues/11560 | Connect to a new outbound peer if our tip is stale by sdaftuar · Pull Request #11560 · bitcoin/bitcoin · GitHub
359 2017-11-01T16:12:07  <sdaftuar> matt pointed out to me that ForNode has to walk vNodes -- so looping on mapNodeState makes that loop n^2, instead of n log n
360 2017-11-01T16:16:44  <cfields> sdaftuar: well you'll have to hold cs_vNodes for that to be safe...
361 2017-11-01T16:17:04  <sdaftuar> ForEachNode already holds cs_vNodes right?
362 2017-11-01T16:17:10  <cfields> or you mean doing the whole thing in ForEachNode ?
363 2017-11-01T16:17:29  <sdaftuar> yeah i wanted to undo the change from ForEachNode -> loop on mapNodeState
364 2017-11-01T16:17:35  <cfields> do you have the old commit handy?
365 2017-11-01T16:17:40  <sdaftuar> yep
366 2017-11-01T16:18:08  <sdaftuar> this is the commit that changed it: https://github.com/sdaftuar/bitcoin/commit/be8c4337838b17cc495f657c2f8bd94912e158d3
367 2017-11-01T16:18:33  <sdaftuar> unsquashed branch is here: https://github.com/sdaftuar/bitcoin/commits/11560.1
368 2017-11-01T16:18:52  <sdaftuar> it occurred to me that maybe i should check that CNodeState is not null in there
369 2017-11-01T16:19:05  <sdaftuar> if i'm using ForEachNode i mean
370 2017-11-01T16:19:08  <cfields> oh, i see what you mean. I thought you were talking about the _other_ lookup in ForNode below
371 2017-11-01T16:19:31  <sdaftuar> ah, no i'm not worried about that, that's just O(n)
372 2017-11-01T16:19:38  <sdaftuar> i'm just concerned about the n^2
373 2017-11-01T16:22:47  <cfields> yea, ok
374 2017-11-01T16:23:04  <sdaftuar> great thanks
375 2017-11-01T16:25:46  <cfields> sdaftuar: fwiw, I was hoping to do something like this: https://github.com/theuni/bitcoin/commit/0693ffb8ed386095a27a8ca62a7eacada2e9db04
376 2017-11-01T16:26:58  <cfields> (after the upcoming libevent changes, the fDisconnect status doesn't really matter since nodes are disconnected almost instantly. So we will want to drop those checks anyway.
377 2017-11-01T16:27:12  <cfields> so that just leaves the CNodeState checks in that first test
378 2017-11-01T16:27:18  <sdaftuar> ah, interesting
379 2017-11-01T16:27:44  <sdaftuar> so we'd drop having to look into the cnode at all?
380 2017-11-01T16:28:01  * sdaftuar -> lunch
381 2017-11-01T16:28:27  <cfields> yea, we'd just connman->Disconnect(id)
382 2017-11-01T16:30:01  <cfields> well, we'd also have to check for connection time > 30 sec. That's why I was suggesting that we make the timeout equal to the handshake, then we wouldn't have to do that either.
383 2017-11-01T16:30:53  <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/cffa5ee132f3...1b8c88451b05
384 2017-11-01T16:30:53  <bitcoin-git> bitcoin/master 5d465e3 Tomas van der Wansem: Ensure backupwallet fails when attempting to backup to source file...
385 2017-11-01T16:30:54  <bitcoin-git> bitcoin/master 1b8c884 MarcoFalke: Merge #11376: Ensure backupwallet fails when attempting to backup to source file...
386 2017-11-01T16:31:24  <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11376: Ensure backupwallet fails when attempting to backup to source file (master...core) https://github.com/bitcoin/bitcoin/pull/11376
387 2017-11-01T16:33:08  <sipa> sdaftuar: were you going to adapt the approach to use an incrementable semaphore instead of a separate bool?
388 2017-11-01T16:33:30  <sipa> or rather do that in a post-0.15.0.2 improvement
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391 2017-11-01T16:50:36  <sdaftuar> sipa: i'm not that familiar with the semaphore implementation so i was going to hold off on that
392 2017-11-01T16:51:07  <sipa> okay
393 2017-11-01T16:51:13  <sdaftuar> also i think there was some preference (at least from matt, not sure about others) for not having both a feeler and a 9th connection out at the same time
394 2017-11-01T16:51:27  <sdaftuar> i don't feel strongly about that, but that would be a reason in favor of a bool vs incrementable semaphore i think?
395 2017-11-01T16:53:27  <sdaftuar> cfields: i'm not following how you could drop the connection time > 30 second check?
396 2017-11-01T16:57:01  <sdaftuar> cfields: specifically i had greg's same question about how you avoid disconnecting a peer that you just connected to
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401 2017-11-01T17:07:55  <cfields> sdaftuar: you'd still check, but it could be done in CConnman. Changing to 60sec would just mean that CConnman's notion of earliest-possible-timeout (these change to libevent timers) wouldn't change
402 2017-11-01T17:08:24  <cfields> I was getting ahead of myself, I guess that comment makes no sense without the future changes in mind
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417 2017-11-01T17:52:57  <sipa> BlueMatt: how did the invalidateblock code result in failure for pruned nodes?
418 2017-11-01T17:53:08  <sipa> (just trying to understand)
419 2017-11-01T17:53:33  <sdaftuar> sipa: i think the issue is if you call invalidateblock on a blockhash that you've pruned
420 2017-11-01T17:53:50  <BlueMatt> yea, it'll walk backwards, and set the invalid flag BEFORE disconnecting it
421 2017-11-01T17:53:57  <BlueMatt> then when you go to disconnect, you will fail to read from disk and shut down
422 2017-11-01T17:54:24  <BlueMatt> (AbortNode, I believe) but now when you start up no block meets the conditions for inclusion in setBlockIndexCandidates
423 2017-11-01T17:54:44  <BlueMatt> because there are no blocks that are either a) our tip and valid or b) at least as much work as our tip and have data
424 2017-11-01T17:55:10  <BlueMatt> so you hit the !setBlockIndexCandidates.empty() assert
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426 2017-11-01T17:55:45  <sipa> BlueMatt: i see!
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428 2017-11-01T17:56:05  <sipa> would there be a problem with marking the blocks invalid after disconnecting them, but one by one?
429 2017-11-01T17:56:12  <sipa> as opposed to after the whole invalidated
430 2017-11-01T17:56:14  <sipa> brb, meeting
431 2017-11-01T17:57:22  <BlueMatt> sipa: not 100% sure. you'd definitely fail CheckBlockIndex, but it may actually be fine...you'd end up with things in your mapBlockIndex upon restart that have BLOCK_FAILED_CHILD but who's parents are IsValid, which is nonsense
432 2017-11-01T17:57:28  <BlueMatt> it might, however, very likely not actually break anything
433 2017-11-01T17:57:54  <BlueMatt> still, I *really* didnt want to try to think through that in the context of the g_failed_blocks stuff
434 2017-11-01T17:57:56  <sipa> anyone, no objection to the change that was merged
435 2017-11-01T17:58:03  <sipa> *anyway
436 2017-11-01T17:58:47  <BlueMatt> I take that back, CheckBlockIndex does *not* verify this, but, again, its nonsense
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453 2017-11-01T19:06:55  <sipa> BlueMatt: i've for a while regretted the choice of having validity flags inside the block index
454 2017-11-01T19:07:12  <BlueMatt> I mean they are a pretty separate concept
455 2017-11-01T19:07:12  <sipa> your PR makes me wonder if we couldn't get rid of them entirely
456 2017-11-01T19:07:21  <sipa> valid = chainActive
457 2017-11-01T19:07:22  <BlueMatt> I mean we have to have them somewhere
458 2017-11-01T19:07:29  <sipa> invalid = in g_failed_blocks
459 2017-11-01T19:07:33  <BlueMatt> no, we need a concept of "descends from invalid"
460 2017-11-01T19:07:58  <BlueMatt> I mean that kinda sucks cause it grows unbounded
461 2017-11-01T19:08:02  <BlueMatt> though not the end of the world, I suppose
462 2017-11-01T19:08:13  <sipa> it's at most a constant factor larger than mapBlockIndex itself
463 2017-11-01T19:08:17  <sipa> a very small constant factor
464 2017-11-01T19:08:23  <gmaxwell> how would thing like invalidateblock / reconsider block work?  or pipelined validation with multiple stages of verification?
465 2017-11-01T19:08:23  <sdaftuar> yes but it slows down acceptblockheader
466 2017-11-01T19:08:39  <sdaftuar> you wouldn't want to iterate mapBlockindex just to accept a new header
467 2017-11-01T19:09:34  <sipa> right, you want some form of 'caching' of invalid descendants
468 2017-11-01T19:09:42  <sipa> but perhaps that doesn't need to be mapBlockIndex
469 2017-11-01T19:10:08  <sipa> anyway, just a wild idea
470 2017-11-01T19:10:35  <gmaxwell> it is kind of silly to have an extra field for something that is almost always just in a single state.
471 2017-11-01T19:11:31  <BlueMatt> yea, I mean it is true that we barely use nStatus for anything except for HAVE_DATA
472 2017-11-01T19:11:46  <sipa> and it doesn't even cover the whole thing
473 2017-11-01T19:11:47  <BlueMatt> (which I guess is implied by the diskpos thing)
474 2017-11-01T19:12:00  <sipa> we use nChainTx as indicator for "all parent blocks downloaded"
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477 2017-11-01T19:13:08  <BlueMatt> yea, I mean we do need VALID_SCRIPTS for net_processing :/
478 2017-11-01T19:13:18  <BlueMatt> cause we're not allowed to send stuff unless its VALID_SCRIPTS
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490 2017-11-01T20:24:00  <bitcoin-git> [bitcoin] theuni opened pull request #11593: rpc: work-around an upstream libevent bug (master...fix-libevent-cb) https://github.com/bitcoin/bitcoin/pull/11593
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494 2017-11-01T20:48:04  <BlueMatt> cfields: travis failed on ^ (libevent in the travis os is 2.0, looks like, which does not have the getcb function)
495 2017-11-01T20:48:06  <BlueMatt> only 2.1 has it
496 2017-11-01T20:48:34  <cfields> ugh
497 2017-11-01T20:49:08  <cfields> ok, working on it
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499 2017-11-01T21:12:47  <MarcoFalke> wumpus: cfields: I was trying to prepare the 0.15.0.2 release but I am stuck at deciding whether to backport #10756.
500 2017-11-01T21:12:49  <gribble> https://github.com/bitcoin/bitcoin/issues/10756 | net processing: swap out signals for an interface class by theuni · Pull Request #10756 · bitcoin/bitcoin · GitHub
501 2017-11-01T21:13:06  <MarcoFalke> some of the commits depend on it
502 2017-11-01T21:13:35  <MarcoFalke> It might be shorter (with regard to LOC) to solve the merge conflicts manually
503 2017-11-01T21:13:47  <MarcoFalke> But I'd wanted to see what you prefer
504 2017-11-01T21:16:40  <cfields> MarcoFalke: i don't think that should be needed. What are the conflicts?
505 2017-11-01T21:17:59  <MarcoFalke> In function ‘bool SendMessages(CNode*, CConnman&, const std::atomic<bool>&)’: error: ‘ConsiderEviction’ was not declared in this scope
506 2017-11-01T21:20:27  <cfields> ah right, new members
507 2017-11-01T21:20:29  <cfields> sec
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509 2017-11-01T21:23:28  <cfields> MarcoFalke: blah, backporting 10756 may be easier, as more and more commits build on it
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511 2017-11-01T21:24:27  <cfields> MarcoFalke: it's either that, or break the new functions (like ConsiderEviction) global/static, and pass in the CConnman pointer
512 2017-11-01T21:24:39  <MarcoFalke> Jup, figured that
513 2017-11-01T21:27:27  <MarcoFalke> Since the not-yet-merged #11560 also needs it, I will try to cherry-pick your refactoring commits
514 2017-11-01T21:27:29  <gribble> https://github.com/bitcoin/bitcoin/issues/11560 | Connect to a new outbound peer if our tip is stale by sdaftuar · Pull Request #11560 · bitcoin/bitcoin · GitHub
515 2017-11-01T21:35:00  <ghost43> I would be interested in the exact semantics of nLockTime and chainActive.Height() here https://github.com/bitcoin/bitcoin/blob/5b059a833eb57a4dd8458f42aedba85265b2bbf3/src/wallet/wallet.cpp#L2661  -- does this line ensure that only the next block contain the tx? should it be height+1? at the same time I just tested and bitcoind rejects transactions with nLockTime for the next block. so does nLockTime mean that the block to contain a tx
516 2017-11-01T21:35:00  <ghost43> has to have a height of nLockTime+1?
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519 2017-11-01T21:54:24  <cfields> BlueMatt: pushed a new version that mimics the upstream fix
520 2017-11-01T21:58:14  <BlueMatt> thanks! will review in a few minutes
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