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 24 2017-09-18T03:25:36  <esotericnonsense> wow, syncing on the same host is quick. 25% progress in 24 minutes.
 25 2017-09-18T03:25:44  <esotericnonsense> (unpruned)
 26 2017-09-18T03:26:12  * esotericnonsense wonders if the whole thing would be sub-100.
 27 2017-09-18T03:35:35  <sipa> it won't due to signature validation
 28 2017-09-18T03:35:56  <sipa> which is only done after the assumevalid points
 29 2017-09-18T03:36:03  <esotericnonsense> ah bugger yes.
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 83 2017-09-18T09:40:03  <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/e278f86c5369...d6d2c8503c40
 84 2017-09-18T09:40:03  <bitcoin-git> bitcoin/master a0b4c24 Dan Raviv: Trivial: Fix validation comments...
 85 2017-09-18T09:40:04  <bitcoin-git> bitcoin/master d6d2c85 MarcoFalke: Merge #11340: Trivial: Fix validation comments...
 86 2017-09-18T09:40:45  <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11340: Trivial: Fix validation comments (master...patch-12) https://github.com/bitcoin/bitcoin/pull/11340
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 88 2017-09-18T10:29:13  <promag> is github user danra around?
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113 2017-09-18T11:52:00  <meshcollider> promag: don't think so, never seen them in here
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116 2017-09-18T12:19:50  <promag> ok
117 2017-09-18T12:19:51  <promag> ty
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127 2017-09-18T13:26:08  <BlueMatt_> jonasschnelli: you got a poly hash patch lying around somewhere I can just steal?
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130 2017-09-18T13:27:09  <BlueMatt> hmm, guess not :/
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141 2017-09-18T14:06:11  <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/d6d2c8503c40...44e1fd926cfb
142 2017-09-18T14:06:12  <bitcoin-git> bitcoin/master e9e9391 John Newbery: [tests] Check connectivity before sending in assumevalid.py...
143 2017-09-18T14:06:12  <bitcoin-git> bitcoin/master 44e1fd9 MarcoFalke: Merge #11345: [tests] Check connectivity before sending in assumevalid.py...
144 2017-09-18T14:06:55  <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11345: [tests] Check connectivity before sending in assumevalid.py (master...assume_valid_improvement) https://github.com/bitcoin/bitcoin/pull/11345
145 2017-09-18T14:09:03  <achow101> do we have 0.15.0.1 detached signatures yet?>
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149 2017-09-18T14:22:35  <jonasschnelli> BlueMatt: poly hash patch?
150 2017-09-18T14:22:59  <jonasschnelli> You mean ChaCha20Poly1305? https://github.com/jonasschnelli/chacha20poly1305
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152 2017-09-18T14:29:17  <BlueMatt> jonasschnelli: yea, essentially that, msotly I was lazy and didnt want to figure out what the reasonable implementation to take was :p
153 2017-09-18T14:29:29  <BlueMatt> (well, meant integrated in bitcoind, but thats fine too)
154 2017-09-18T14:29:57  <jonasschnelli> BlueMatt: that above is ripped out form openssl (and made it independent from anything else)
155 2017-09-18T14:30:01  <jonasschnelli> openssh! sry
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162 2017-09-18T14:40:21  <BlueMatt> ah, cool
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164 2017-09-18T14:40:31  <BlueMatt> looks like its just the dona one
165 2017-09-18T14:40:38  <BlueMatt> donna
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195 2017-09-18T16:33:47  <RealM9> Bitcoin is again under a spam attack
196 2017-09-18T16:33:50  <RealM9> https://imgur.com/a/Jxfvy
197 2017-09-18T16:34:46  <RealM9> I know nobody here thinks about a way how to solve this, but i think it's a huge problem. Miners can spam network for free, if they work togather. Think about this. And antpool mines another VIP block
198 2017-09-18T16:37:55  <RealM9> 14 MB mempool data of 100-140sat/byte TXes
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200 2017-09-18T16:39:45  <andytoshi> miners can't spam any more cheaply than anybody else. 14 Mb at 100sat/byte is like $50000
201 2017-09-18T16:39:52  <lvmbdv> oh god forbid something takes up 15 MB of my RAM :o
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203 2017-09-18T16:40:16  <lvmbdv> and proof-of-work assumes the expenses of spamming the network would drive bad guys away
204 2017-09-18T16:40:30  <RealM9> Well remember that mining is centralized and miners get fees
205 2017-09-18T16:41:03  <RealM9> And some big block conference is happening soon
206 2017-09-18T16:41:34  <andytoshi> #bitcoin please
207 2017-09-18T16:42:03  <RealM9> Maybe core should create some anti-spam mechanisms on 0.15.1
208 2017-09-18T16:42:44  <Chicago> ... until when?  Until Micro-Bitcoins are a common denomination?
209 2017-09-18T16:42:54  <RealM9> Because, you know that S2X fork is coming and if miners will spam, they will do it NOW. Before S2X
210 2017-09-18T16:42:55  <gmaxwell> this is stupid. I haven't seen any evidence of spam, just people aggregating txs at very low feerates.
211 2017-09-18T16:43:30  <RealM9> Isn't this evidence https://i.imgur.com/oCANzXW.png ?
212 2017-09-18T16:43:42  <andytoshi> RealM9: i am answering you in #bitcoin
213 2017-09-18T16:45:29  <gmaxwell> The only 'fix' to spam needed would be a magic want to stop people from putting up graphing sites that panic people about things the system already handled.
214 2017-09-18T16:47:08  <RealM9> What if they started spamming for let's say, 2 weeks. Their big-block agenda would get only more popular and S2X would be a solution
215 2017-09-18T16:48:15  <RealM9> Yeah, but there aren't really much to do about it without risking to delete legitimate TXes from mempool
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217 2017-09-18T16:48:22  <gmaxwell> I looked last night when people first started squaking about that and it appeared to be due to txs like https://blockchain.info/tx/87cd70a1859f1029d7619ca6b745232e34b8627fc7ac1e2e50a4b2705c6aba48 which are just plain aggregation tx
218 2017-09-18T16:49:08  <gmaxwell> RealM9: What if?  who cares. You just pay a slightly higher feerate than them and they stop existing as far as you're concerned.
219 2017-09-18T16:50:15  <gmaxwell> For every transaction paying feerate X they display by one block they have to pay x over again in fees. Even if it's a miner doing it the result is astronmically expensive.
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221 2017-09-18T16:54:04  <RealM9> Hm, ok
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227 2017-09-18T17:09:32  <jimpo> I have two PRs that have been lingering for a while, #11113 and #11116. Can I get another look from reviewers/maintainers? Otherwise I'll just close them.
228 2017-09-18T17:09:34  <gribble> https://github.com/bitcoin/bitcoin/issues/11113 | [net] Ignore getheaders requests for very old side blocks. by jimpo · Pull Request #11113 · bitcoin/bitcoin · GitHub
229 2017-09-18T17:09:35  <gribble> https://github.com/bitcoin/bitcoin/issues/11116 | [script] Unit tests for script/standard and IsMine functions. by jimpo · Pull Request #11116 · bitcoin/bitcoin · GitHub
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239 2017-09-18T17:57:43  <instagibbs> jimpo, please don't close them, they both have at least one utACK
240 2017-09-18T17:57:55  <instagibbs> 0.15 release means it's a better time to bug people likely
241 2017-09-18T18:01:00  <sheldonthomas> Hi - please correct me if this isn’t the place but I’m experiencing a 100% reproducible crash on 0.15 on Mac OS X using the offical bitcoincore binaries (I verified their sha sums). Is this known/discussed or have their been similar reports or am I alone in experiencing this? My debug.log gets passed 2017-09-18 17:47:45 GUI: Platform customization: "macosx" and then I see a few UpdateTip messages go by and I have a system exception. Key
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243 2017-09-18T18:01:01  <sheldonthomas> here is it’s 100% reproducible, happens every time. Crashed Thread:        0  Dispatch queue: com.apple.main-thread
244 2017-09-18T18:01:02  <sheldonthomas> Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
245 2017-09-18T18:01:04  <sheldonthomas> Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000008
246 2017-09-18T18:01:05  <sheldonthomas> Exception Note:        EXC_CORPSE_NOTIFY
247 2017-09-18T18:01:07  <sheldonthomas> Termination Signal:    Segmentation fault: 11
248 2017-09-18T18:01:08  <sheldonthomas> Termination Reason:    Namespace SIGNAL, Code 0xb
249 2017-09-18T18:01:08  <sheldonthomas> Terminating Process:   exc handler [0]
250 2017-09-18T18:02:09  <sheldonthomas> Note that the first time I ran 0.15 the UTXO set upgrade completed just fine. A moment later it crashed and now crashes every time.
251 2017-09-18T18:02:51  <sipa> sheldonthomas: please open an issue on https://github.com/bitcoin/bitcoin/issues
252 2017-09-18T18:04:00  <sheldonthomas> Okay. It’s not possible to run 0.14.2 after you’ve done the UTXO set db upgrade, correct?
253 2017-09-18T18:04:16  <sipa> indeed
254 2017-09-18T18:05:10  <sheldonthomas> ok, will open an issue. this effectively locks users out of their wallets since the program won’t run and the prior version cannot be run.
255 2017-09-18T18:05:48  <sipa> you're always able to reindex (start with -reindex-chainstate flag)
256 2017-09-18T18:05:57  <sipa> but maybe you want to help debug the issue
257 2017-09-18T18:06:13  <sipa> oh
258 2017-09-18T18:06:18  <achow101> sipa: sheldonthomas it's probably related to #11171
259 2017-09-18T18:06:20  <sipa> try updating to 0.15.0.1
260 2017-09-18T18:06:21  <gribble> https://github.com/bitcoin/bitcoin/issues/11171 | RC2 Exits After Initialization · Issue #11171 · bitcoin/bitcoin · GitHub
261 2017-09-18T18:06:40  <sipa> there is a known issue that can cause a crash
262 2017-09-18T18:06:43  <achow101> sheldonthomas: please pastebin the contents of ~/Library/Preferences/org.bitcoin.Bitcoin-Qt.plist
263 2017-09-18T18:06:50  <achow101> sheldonthomas: then start Bitcoin Core with -resetguisettings
264 2017-09-18T18:06:58  <achow101> but I need to see the contents of that file first
265 2017-09-18T18:07:27  <achow101> sipa: 0.15.0.1 is not released yet (no codesigned gitian builds yet, not posted to bitcoin.org)
266 2017-09-18T18:07:36  <sipa> achow101: thanks, i've been out of the loop
267 2017-09-18T18:09:39  <sheldonthomas> my editor shows that plist with some garbled binary, shall I pastebin that as utf8 out?
268 2017-09-18T18:09:48  <achow101> yes
269 2017-09-18T18:11:00  <sheldonthomas> https://pastebin.com/jHYvg2NE
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271 2017-09-18T18:12:10  <sheldonthomas> I’m running it via a command in my path like: open /Applications/bitcoin15/Bitcoin-Qt.app/ --args -datadir=‘…’
272 2017-09-18T18:13:27  <achow101> wow, that's a weird looking file
273 2017-09-18T18:13:54  <achow101> I thought plist files were xml like
274 2017-09-18T18:14:18  <sheldonthomas> I can run it through a util. One moment
275 2017-09-18T18:14:21  <sipa> sheldonthomas: can you paste a hexdump instead?
276 2017-09-18T18:15:15  <sheldonthomas> sipa: https://pastebin.com/N3FjsnWE
277 2017-09-18T18:16:39  <sheldonthomas> There’s nothing out of the ordinary in debug.log
278 2017-09-18T18:17:33  <achow101> sheldonthomas: the hexdump should be enough to decipher this I think.
279 2017-09-18T18:17:43  <achow101> start Bitcoin Core with the -resetguisettings option
280 2017-09-18T18:17:54  <sheldonthomas> okay i was about to try the other one, the reindex one too
281 2017-09-18T18:17:56  <achow101> backup the plist file first to some other place first
282 2017-09-18T18:18:00  <sheldonthomas> should i do both, or the other...
283 2017-09-18T18:18:04  <sheldonthomas> Ok I’ll back that up
284 2017-09-18T18:18:16  <achow101> -resetguisettings is all you need to do. I believe this problem is #11171
285 2017-09-18T18:18:17  <gribble> https://github.com/bitcoin/bitcoin/issues/11171 | RC2 Exits After Initialization · Issue #11171 · bitcoin/bitcoin · GitHub
286 2017-09-18T18:19:59  <sheldonthomas> Just noticed I have another plist called  org.bitcoinfoundation.Bitcoin-Qt.plist should I remove that?
287 2017-09-18T18:20:01  <arubi> it's kinda cool how it goes through all control characters from a->z
288 2017-09-18T18:20:56  <achow101> sheldonthomas: can you pastebin that too?
289 2017-09-18T18:21:01  <achow101> and back it up
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291 2017-09-18T18:28:02  <sheldonthomas> achow: here is that dump https://pastebin.com/n2JSmSbp
292 2017-09-18T18:28:39  <sheldonthomas> Am going to add resetguisettings to my bitcoin.conf will that suffice?
293 2017-09-18T18:29:26  <achow101> sheldonthomas: that will work. don't forget to remove that after you start Bitcoin Core otherwise you will be resetting those settings on every start
294 2017-09-18T18:30:51  <sheldonthomas> I guess it needs resetguisettings=1 ?
295 2017-09-18T18:31:05  <sipa> yes
296 2017-09-18T18:31:29  <sheldonthomas> seems to have fixed it.
297 2017-09-18T18:31:32  <sheldonthomas> bitcoin core cruising again.
298 2017-09-18T18:31:47  <sheldonthomas> much thanks
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305 2017-09-18T19:13:57  <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/44e1fd926cfb...4ce2f3d0d333
306 2017-09-18T19:13:57  <bitcoin-git> bitcoin/master 1817398 Cory Fields: mininode: add an optimistic write and disable nagle...
307 2017-09-18T19:13:58  <bitcoin-git> bitcoin/master 4ce2f3d MarcoFalke: Merge #11323: mininode: add an optimistic write and disable nagle...
308 2017-09-18T19:14:31  <bitcoin-git> [bitcoin] MarcoFalke closed pull request #11323: mininode: add an optimistic write and disable nagle (master...optimistic-mininode) https://github.com/bitcoin/bitcoin/pull/11323
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334 2017-09-18T21:13:12  <promag> jnewbery: any reason to jump to -32 in https://github.com/bitcoin/bitcoin/pull/11031/files#diff-7563bce5f7cf8ee3e5568afc8578e9e7R60?
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338 2017-09-18T21:24:12  <bitcoin-git> [bitcoin] practicalswift opened pull request #11361: Remove redundant LOCK(…) and AssertLockHeld(…) (master...remove-redundant-locks) https://github.com/bitcoin/bitcoin/pull/11361
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342 2017-09-18T21:48:42  <jnewbery> promag: -29, -30 and -31 are already taken (look in the 'P2P client errors' section below)
343 2017-09-18T21:49:28  <promag> doh
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345 2017-09-18T21:51:41  <promag> btw, just a little nit :P commit message should be sentence case?
346 2017-09-18T21:54:47  <jnewbery> Thanks! Fixed
347 2017-09-18T22:03:55  <jonasschnelli> cfields_: can you have a final look at https://github.com/bitcoin/bitcoin/pull/11113?
348 2017-09-18T22:04:07  <jonasschnelli> Has some acks, ... but misses yours?
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350 2017-09-18T22:17:16  <promag> jonasschnelli: btw https://github.com/bitcoin/bitcoin/pull/11281#pullrequestreview-63497928
351 2017-09-18T22:18:00  <promag> jnewbery: wdyt https://github.com/bitcoin/bitcoin/pull/10552#issuecomment-330271664 ?
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357 2017-09-18T22:58:40  <goatpig> are there still milestones hardcoded in for boostrapping the chainstate db?
358 2017-09-18T23:00:36  <luke-jr> checkpoints? yes
359 2017-09-18T23:00:50  <luke-jr> although in Core, they haven't been updated in a long time (intentionally)
360 2017-09-18T23:03:37  <gmaxwell> "for boostrapping the chainstate db?" for that, no there has never been anything like that.
361 2017-09-18T23:05:40  <goatpig> i mean the set of milestones to check hashes instead of signatures for early chain data
362 2017-09-18T23:05:46  <goatpig> luke-jr: why have they not been updated?
363 2017-09-18T23:07:27  <sipa> goatpig: we want to get rid of checkpoints
364 2017-09-18T23:07:52  <sipa> their functionality has been replaced by headers-first sync & assumevalid
365 2017-09-18T23:08:20  <sipa> (almost, but not entirely - they still protect against a weak memory exhaustion attack, but old checkpoints suffice for that)
366 2017-09-18T23:08:45  <goatpig> ah so the feature has been replaced
367 2017-09-18T23:08:56  <sipa> assumevalid is maybe what you're after - it's a configurable block hash we know has valid signatures in its history
368 2017-09-18T23:09:07  <goatpig> yeah that';s what im after
369 2017-09-18T23:09:08  <sipa> but it doesn't force the client to only accept that chain (as checkpoints did)
370 2017-09-18T23:09:23  <sipa> they just bypass validation IF that chain we to otherwise be validated
371 2017-09-18T23:09:34  <goatpig> but there is a default hardcoded value in the code that's being updated now?
372 2017-09-18T23:09:55  <sipa> that's correct
373 2017-09-18T23:10:02  <goatpig> ok that's what i wanted to know
374 2017-09-18T23:10:03  <goatpig> thanks
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376 2017-09-18T23:11:01  <sipa> https://github.com/bitcoin/bitcoin/blob/master/src/chainparams.cpp#L107
377 2017-09-18T23:11:26  <goatpig> that's the current one in 0.15 right?
378 2017-09-18T23:11:34  <sipa> yes
379 2017-09-18T23:11:39  <goatpig> thanks a lot
380 2017-09-18T23:13:11  <gmaxwell> goatpig: these thigns do not fix a particular chain, and only have an effect if they're in our best chain and burried by a couple weeks work.
381 2017-09-18T23:14:11  <goatpig> you mean if you are exposed to a chain that branches before the assume valid hash and that it's longer than the assumed one, it would check all sigs in that branch regardless?
382 2017-09-18T23:14:18  <sipa> yes
383 2017-09-18T23:14:25  <goatpig> sure, makes sense
384 2017-09-18T23:17:03  <promag> in that case doesn't make sense to assume valid from the fork backwards?
385 2017-09-18T23:18:15  <goatpig> im guessing it does assumevalid up until the branch point, then drops the behavior as soon as it forks
386 2017-09-18T23:18:26  <sipa> promag: assumevalid=X means that script validation is skipped for any block that is an ancestor of X
387 2017-09-18T23:18:36  <sipa> so i think it does what you're saying
388 2017-09-18T23:18:50  <gmaxwell> sipa: no, not if the assumevalid block is not in the best chain.
389 2017-09-18T23:19:04  <gmaxwell> promag: potentially but thats a dumb situation:  Don't set the value on a fork and then there is no need for code to handle that case, nor need for tests to test it. :)
390 2017-09-18T23:19:48  <gmaxwell> but yes, I believe that what you suggest would be fine (other than the unnecessary complexity)
391 2017-09-18T23:20:09  <goatpig> gmaxwell: then what's the decision in case of a fork? don't forward the assumevalid hash past that fork point for ages?
392 2017-09-18T23:20:48  <sipa> goatpig: i'm confused
393 2017-09-18T23:21:29  <goatpig> gmax saying assumevalid does not afford you bypassing sig checks if the assumed valid hash is on the shortest branch of a fork
394 2017-09-18T23:21:37  <gmaxwell> goatpig: if its ambiguous what chain is correct for ages we have bigger problems.
395 2017-09-18T23:22:11  <achow101> goatpig: if the assumevalid block is not in your best chain, then you will be validating all signatures
396 2017-09-18T23:22:16  <gmaxwell> what I've been doing on updating them is setting it to a most recent block when I open the PR, and just checking that it's still in the chain by the time the PR is ready to be merged.
397 2017-09-18T23:22:23  <goatpig> therefor, how do you handle forks with that updating that hardcoded hash in the case there is a potential for the fork to sustain 2 semi equivalent branches (in term of work)
398 2017-09-18T23:22:33  <achow101> if the best chain changed to not include the assumevalid hash, then all blocks you have already been verified won't be re-verified
399 2017-09-18T23:22:34  <gmaxwell> if it were to fall out, oh well, sync would take somewhat longer. Not the end of the world.
400 2017-09-18T23:22:58  <goatpig> ok
401 2017-09-18T23:23:02  <goatpig> just curious about the whole mechanic
402 2017-09-18T23:23:55  <gmaxwell> goatpig: if something like that went on for weeks it would be doubtful if bitcoin would continue to exist at the end of such an event, regardless tweaking forward assumevalid wouldn't be a high priority. ... losing it entirely isn't that big of a deal.
403 2017-09-18T23:24:23  <goatpig> i get it
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405 2017-09-18T23:26:11  <wampy> hello! v0.15.0.1 fixes the segfault I was getting upgrading from 0.14.2. Thanks to all who helped track that down
406 2017-09-18T23:26:20  <gmaxwell> wampy: thanks!
407 2017-09-18T23:27:02  <promag> > other than the unnecessary complexity gmaxwell: right, edge case.. better validate all :P
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416 2017-09-18T23:35:45  <midnightmagic> lol https://pbs.twimg.com/media/DJw1oWRW4AEnICf.jpg
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418 2017-09-18T23:42:56  <bitcoin-git> [bitcoin] gmaxwell opened pull request #11362: Remove nBlockMaxSize from miner opt struct as it is no longer used. (master...2017_09_rm_nBlockMaxSize) https://github.com/bitcoin/bitcoin/pull/11362
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