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 11 2019-02-23T01:28:28  <mischa010> hi!
 12 2019-02-23T01:28:40  <mischa010> do peers remember which peers were fastest in sending them data, how does this work? are INV's sent to the 'top ranked' peers first? where is the relevant code?
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 14 2019-02-23T01:41:02  <sipa> mischa010: invs are sent to all peer, period
 15 2019-02-23T01:41:33  <sipa> if multiple peers announce the same tx/block to us, we only getdata one of them
 16 2019-02-23T01:48:25  <gmaxwell> though inv/getdata is used rarely for blocks and is slow...
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 18 2019-02-23T01:49:43  <gmaxwell> tx invs are queued to all peers and then the queues are drained at random times.
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 28 2019-02-23T02:37:49  <gmaxwell> MarcoFalke: re https://github.com/bitcoin/bitcoin/pull/15451  I assume that we broke some altcoin that has other kinds of invs, and the PR author is trying to suggest a comment change that would have avoided his confusion.
 29 2019-02-23T02:38:40  <gmaxwell> (other kinds handled via generic getdata-anything-inved logic and not handled by special cases as we do)
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 66 2019-02-23T07:11:33  <fanquake> promag around today?
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 95 2019-02-23T07:58:22  <IZooo> hello
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 98 2019-02-23T08:14:47  <wumpus> helllo
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102 2019-02-23T08:46:59  <promag_> fanquake: hi, need something?
103 2019-02-23T08:58:23  <warren> https://github.com/bitcoin/bitcoin/pull/15277 Hoping people can help with what is hopefully a simple environment difference between Ubuntu and this other distro. dongcarl is really close to a deterministic replacement for gitian's toolchain. It may only be a matter of figuring out this linker issue then writing a wrapper around the entire thing.
104 2019-02-23T09:05:41  <luke-jr> warren: FWIW, our current binaries aren't actually portable, so I'm not sure how important a 1:1 match on linkage is
105 2019-02-23T09:06:03  <luke-jr> (I can't run the ones gitian makes)
106 2019-02-23T09:08:00  <warren> luke-jr: oh did you report the issue? what distro are you running on?
107 2019-02-23T09:08:12  <luke-jr> Gentoo, IIRC someone reported it years ago
108 2019-02-23T09:08:33  <luke-jr> https://github.com/bitcoin/bitcoin/issues/6628
109 2019-02-23T09:08:36  <warren> are you still using that oddball x32 arch?
110 2019-02-23T09:08:54  <luke-jr> no, never migrated to it, only had it in a chroot for testing (and since gave up on it and deleted)
111 2019-02-23T09:09:42  <luke-jr> I'm pretty sure it's something to blame Gentoo for, but who knows
112 2019-02-23T09:09:58  <warren> I'm guessing this isn't more widespread?
113 2019-02-23T09:10:05  <luke-jr> the glibc ebuild seems to carry some weird patch touching __chk_fail stuff
114 2019-02-23T09:10:09  <luke-jr> dunno
115 2019-02-23T09:10:40  <warren> We should be more concerned about the reason why we've wanted a deterministic toolchain to replace gitian.
116 2019-02-23T09:12:20  <fanquake> promag_ a few thoughts/questions about 15204, but might just put them into the PR
117 2019-02-23T09:12:52  <promag_> #15204
118 2019-02-23T09:12:53  <gribble> https://github.com/bitcoin/bitcoin/issues/15204 | gui: Add Open External Wallet action by promag · Pull Request #15204 · bitcoin/bitcoin · GitHub
119 2019-02-23T09:13:02  <promag_> go ahead
120 2019-02-23T09:20:03  <fanquake> promag_ One is wether we should just be creating a new "wallet" in any directory selected from that menu.
121 2019-02-23T09:20:19  <fanquake> It's not exactly obvious that's what will happen (or if it should be the default behaviour), rather than a "No wallet to load popup/error".
122 2019-02-23T09:20:34  <promag_> it should not create
123 2019-02-23T09:21:19  <fanquake> Right. At the moment I can select any directory on the system, wallet directory or not, and if it's not, it's turned into one.
124 2019-02-23T09:21:19  <promag_> later create wallet can have a "select other destination" or something
125 2019-02-23T09:21:28  <promag_> yeah I know
126 2019-02-23T09:22:15  <promag_> I want to be able to just open, not createOrOpen
127 2019-02-23T09:23:07  <fanquake> Yea, that would be the preferred behaviour
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130 2019-02-23T09:46:39  <wumpus> luke-jr: it's also not portable to systems that don't use glibc at all-in my experience the gitian-produced executables work on a wide range of systems in the wild, but undoubtly there's always a limit to portability
131 2019-02-23T09:47:24  <wumpus> and we all know that full static linking has its own slew of issues
132 2019-02-23T09:49:36  <wumpus> the modern way of shipping portable applications for linux are these universal package things such as snap, flatpak, appimage
133 2019-02-23T09:51:31  <wumpus> it prevents issues from the variance in possible environments by running in a predictable environment with predictable versions of libc and other libraries
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136 2019-02-23T10:22:24  <gmaxwell> IIRC years ago I tried using bitcoind on a uclibc system (or musl?) but I think I couldn't get boost working.
137 2019-02-23T10:23:14  <luke-jr> I think at least musl has improved a lot since then
138 2019-02-23T10:24:04  <promag> gmaxwell: https://github.com/ruimarinho/docker-bitcoin-core/blob/master/0.17/alpine/Dockerfile
139 2019-02-23T10:24:16  <promag> alpine uses musl iirc
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182 2019-02-23T15:46:21  <bitcoin-git> [bitcoin] ken2812221 opened pull request #15468: wallet: Use fsbridge::ifstream to fix Windows path issue (master...win-wallet-fix) https://github.com/bitcoin/bitcoin/pull/15468
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203 2019-02-23T19:14:57  <mischa010> hi, im trying to understand how peers are ranked, for example, do peers that take less time to transmit things get priority somehow? what's the relevant bit of code?
204 2019-02-23T19:15:20  <mischa010> gmaxwell? :)
205 2019-02-23T19:15:38  <gmaxwell> priority for what?
206 2019-02-23T19:15:46  <mischa010> sending an inv for example
207 2019-02-23T19:16:07  <mischa010> or getting headers
208 2019-02-23T19:16:15  <mischa010> what determines which peer gets one first
209 2019-02-23T19:16:25  <gmaxwell> transaction invs are batched and are done at totally random times... the only real priority there is that the random times are more frequent for outbound peers.
210 2019-02-23T19:17:03  <mischa010> why is it random instead of immediately?
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213 2019-02-23T19:17:50  <gmaxwell> because immediately would be toxic for privacy and would waste more bandwidth from INVs crossing in flight (so two peers would INV each other the same txn, which happens quite rarely now)
214 2019-02-23T19:19:31  <mischa010> interesting
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216 2019-02-23T19:22:20  <sipa> mischa010: the delay is in the order of a few seconds usually
217 2019-02-23T19:23:53  <mischa010> and blocks? those aren't delayed right?
218 2019-02-23T19:24:12  <sipa> indeed
219 2019-02-23T19:24:13  <mischa010> but there'
220 2019-02-23T19:24:23  <sipa> they're relayed as fast as possible
221 2019-02-23T19:24:56  <mischa010> but there's no peer priority/ranking in relaying blocks? so it's possible a block is relayed to a slow peer instead of the n fastest ones?
222 2019-02-23T19:25:33  <sipa> usually blocks are relayed using compact blocks, which are just a few kb
223 2019-02-23T19:25:52  <sipa> which is too little to cause much contention on most uplinks
224 2019-02-23T19:29:39  <mischa010> but outbound nodes have priority in some cases right?
225 2019-02-23T19:30:19  <mischa010> there's a comment in net_processing.cpp about 'nice' peers
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257 2019-02-23T21:58:15  <mischa010> in this thread it's claimed that compact blocks does indeed rank peers by their speed? https://www.reddit.com/r/Bitcoin/comments/5zo2ku/how_do_i_configure_my_node_to_use_highbandwidth/
258 2019-02-23T21:58:21  <mischa010> is this true>
259 2019-02-23T21:58:23  <mischa010> ?
260 2019-02-23T22:01:20  <sipa> every node picks 3 peers which it asks to send compact blocks directly, instead of having them first announce the block
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264 2019-02-23T22:13:11  <captjakk> Does anyone know why I would be getting a "connection refused" when connecting my lnd to my remote bitcoind instance
265 2019-02-23T22:13:27  <captjakk> to be clear, I'm talking about the zmq port
266 2019-02-23T22:13:36  <captjakk> also zmq isn't refusing connections from localhost
267 2019-02-23T22:13:51  <captjakk> ufw (ubuntu) has been set to allow the zmq ports as well
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271 2019-02-23T22:30:27  <captjakk> looks like my zmq interface was set only to
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273 2019-02-23T22:34:18  <echeveria> you really don’t want to bind ZMQ to anywhere but local host.
274 2019-02-23T22:34:43  <echeveria> if anyone is telling you otherwise, they’re probably being insanely stupid.
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276 2019-02-23T22:51:44  <captjakk_> even if i want to subscribe to zmq updates from a different machine?
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279 2019-02-23T22:56:35  <jimpo> 
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281 2019-02-23T23:01:30  <sipa> 
282 2019-02-23T23:03:04  <echeveria> captjakk_: like, don’t.
283 2019-02-23T23:03:25  <echeveria> it’s not authenticated. it’s not secure. it has a large attack surface. use a VPN if you have to.
284 2019-02-23T23:03:34  <sipa> echeveria: within a local network it's fine
285 2019-02-23T23:03:54  <sipa> but don't exoose it to the internet...
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287 2019-02-23T23:08:22  <gmaxwell> ZMQ also requires both end be running the same library version, so that also makes it not so attractive for things that aren't very tightly coupled.
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290 2019-02-23T23:10:09  <gmaxwell> mischa010: thats why I asked you to be specific earlier.
291 2019-02-23T23:10:31  <gmaxwell> 11:14:57 < mischa010> hi, im trying to understand how peers are ranked, for
292 2019-02-23T23:10:31  <gmaxwell>                       example, do peers that take less time to transmit things
293 2019-02-23T23:10:31  <gmaxwell>                       get priority somehow? what's the relevant bit of code?
294 2019-02-23T23:10:31  <gmaxwell> 11:15:20 < mischa010> gmaxwell? :)
295 2019-02-23T23:10:31  <gmaxwell> 11:15:38 < gmaxwell> priority for what?
296 2019-02-23T23:10:31  <gmaxwell> 11:15:46 < mischa010> sending an inv for example
297 2019-02-23T23:10:54  <gmaxwell> INVs aren't used for relaying blocks except as a backwards compatible fallback.
298 2019-02-23T23:11:55  <gmaxwell> Peers request the last three distinct peers to first provide them a block to request to compact blocks to them without first asking (alowing 0.5 RTT transmission in most cases).
299 2019-02-23T23:12:21  <gmaxwell> when a block comes in, those requests are services first-- in partcular because they can be serviced prior to validation.
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301 2019-02-23T23:13:47  <gmaxwell> The 'order' doesn't really matter (at least not much) because CB messages are very small (10kb or so), and transmission is non-blocking.
302 2019-02-23T23:14:33  <gmaxwell> I tried before trying to sort sends by the nodes own CB preference, but I was unable to measure an improvement even in a pretty contrived setup, so it wasn't worth PRing.
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