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62018-03-11T00:33:04 <bitcoin-git> [bitcoin] eklitzke closed pull request #12664: Rename LevelDB background compaction thread (master...bgcompact) https://github.com/bitcoin/bitcoin/pull/12664
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332018-03-11T02:51:46 <ProfMac_2> A rumor says that a core developer made a block-chain scanner to replace the znort scanner. I would like to learn where this is.
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352018-03-11T02:55:12 <Randolf> ProfMac_2: If it's a rumour, then shouldn't the first step be to summarily dismiss it?
362018-03-11T02:55:47 <luke-jr> #bitcoin-core-dev is not "ask Core devs questions so you can build your scamcoin"
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382018-03-11T03:00:12 <ProfMac_2> Randolf, verify. As this is a direct place to do.
392018-03-11T03:00:54 <sipa> sounds totally plausible - many developers work on various projects
402018-03-11T03:01:02 <sipa> but i haven't heard about something like that
412018-03-11T03:01:28 <ProfMac_2> Thanks, sipa.
422018-03-11T03:01:48 <sipa> it's also the first time i hear znort mentioned in years - i sort of assume there have been various other related things
432018-03-11T03:04:08 <ProfMac_2> I searched the best I could, and ended up there. I'm starting to think that small utilities put into the best design place in the core-client is the best way to simultaneously get a working appliance, and learn the core code.
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452018-03-11T03:06:46 <Randolf> ProfMac_2: Okay, fair enough.
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482018-03-11T03:24:43 <windsok> ProfMac_2: not sure if it's what you are looking for, but https://github.com/citp/BlockSci has a parser
492018-03-11T03:25:39 <ProfMac_2> Thank you. I'll look now.
502018-03-11T03:26:04 <ProfMac_2> Um, 2 days since an update is scary.
512018-03-11T03:27:08 <sipa> scary long or scary short?
522018-03-11T03:28:00 <ProfMac_2> I think 19 year old are proud when they did an update minutes before an important meeting. Older supervisors think the design is good when it is working fine 5 years later.
532018-03-11T03:28:48 <ProfMac_2> 'though I formed those attitudes before git was around.
542018-03-11T03:34:01 <sipa> "design still working 5 years later" is not the same as "no development at all"
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572018-03-11T03:40:02 <Randolf> sipa++
582018-03-11T03:43:23 <ProfMac_2> true.
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2052018-03-11T12:20:14 <esotericnonsense> i mean, last commit to bitcoin/bitcoin is yesterday. :P
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2222018-03-11T14:16:26 <bitcoin-git> [bitcoin] nvercamm opened pull request #12668: Doc: Ubuntu xenial first dependencies (master...patch-1) https://github.com/bitcoin/bitcoin/pull/12668
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2322018-03-11T14:47:57 <fanquake> wumpus/sipa could you ban Dungchuot7979 from GH
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2402018-03-11T15:27:56 <kallewoof> what is GH?
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2442018-03-11T15:33:16 <achow101> github
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2472018-03-11T15:38:25 <kallewoof> oh
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2732018-03-11T18:07:27 <sipa> sdaftuar: seems my benchmark was off, and the jacobi symbol implementation in GMP takes 2us rather than 0.2us; this means it's hardly worth it to use for hashing onto a curve for ECMH (it'd be 8.6us per update rather than 9.3us per update)
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2842018-03-11T18:45:16 <bitcoin-git> [bitcoin] aaassad opened pull request #12670: Link (0.9...master) https://github.com/bitcoin/bitcoin/pull/12670
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2862018-03-11T18:47:11 <bitcoin-git> [bitcoin] sipa closed pull request #12670: Link (0.9...master) https://github.com/bitcoin/bitcoin/pull/12670
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2882018-03-11T18:56:08 <JHDHHHH> Hello guys
2892018-03-11T18:57:05 <JHDHHHH> I'm looking for an UTXO indexer with an (rest) api preferable
2902018-03-11T18:57:18 <JHDHHHH> I want to get all utxo by address
2912018-03-11T18:57:28 <JHDHHHH> any suggestions?
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3332018-03-11T21:32:16 <bitcoin-git> [bitcoin] MarcoFalke pushed 2 new commits to master: https://github.com/bitcoin/bitcoin/compare/bb98aec6743e...d8d9162f5bad
3342018-03-11T21:32:16 <bitcoin-git> bitcoin/master 0fbed98 Akio Nakamura: [script] lint-whitespace: improve print linenumber...
3352018-03-11T21:32:17 <bitcoin-git> bitcoin/master d8d9162 MarcoFalke: Merge #12572: [script] lint-whitespace: find errors more easily...
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3382018-03-11T21:33:11 <bitcoin-git> [bitcoin] MarcoFalke closed pull request #12572: [script] lint-whitespace: find errors more easily (master...morelinenumber) https://github.com/bitcoin/bitcoin/pull/12572
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3442018-03-11T21:49:03 <bitcoin-git> [bitcoin] practicalswift opened pull request #12671: mempool: Avoid locking mutex that is already held by the same thread (master...avoid-locking-mutex-already-held) https://github.com/bitcoin/bitcoin/pull/12671
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3502018-03-11T22:28:55 <bitcoin-git> [bitcoin] practicalswift closed pull request #12671: mempool: Avoid locking mutex that is already held by the same thread (master...avoid-locking-mutex-already-held) https://github.com/bitcoin/bitcoin/pull/12671
3512018-03-11T22:33:46 <bitcoin-git> [bitcoin] shmulim opened pull request #12672: Consensus: Remove unused dependencies (master...removed-unused-deps) https://github.com/bitcoin/bitcoin/pull/12672
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3582018-03-11T22:51:38 <shmulim> First time pull-request here.. What is intended by this request "for steps to reproduce" in the given context? https://github.com/bitcoin/bitcoin/pull/12672
3592018-03-11T22:52:30 * Randolf welcomes shmulim to Bitcoin development
3602018-03-11T22:52:36 <sipa> shmulim: how did you find the unused dependencies?
3612018-03-11T22:54:53 <shmulim> peer-reviewed, removed and ran all tests without. did not use IWYU.
3622018-03-11T22:55:42 <sipa> right, but how do you know those are the only unused dependencies?
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3662018-03-11T23:01:17 <shmulim> there may be other unused dependencies, this commit does not represent a comprehensive check..
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3682018-03-11T23:02:42 <luke-jr> shmulim: just because it runs without them, doesn't mean they're unused (although in this case they are)
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3712018-03-11T23:06:08 <sipa> shmulim: well if we're going to go through an effort to clean up unused dependencies, it would be nice to know it's xomprehensive
3722018-03-11T23:06:13 <sipa> *comprehensive
3732018-03-11T23:09:17 <luke-jr> would be nice if GCC/LLVM had a way to hide the stuff inherited from includes, such that it can at least detect missing dependencies
3742018-03-11T23:10:32 <shmulim> it is not comprehensive.. i'll leave a note on the PR.. thank you both for the pointers.. i'll look into iwyu.
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3792018-03-11T23:17:30 <eklitzke> I am kind of confused about how CheckInputs works. since the script execution cache can return false positives, there must be a path where the scripts are checked without checking the cache. can someone explain how that works?
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3812018-03-11T23:23:40 <sipa> eklitzke: how can it return false positives?
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3832018-03-11T23:24:10 <sipa> all the context, data, and flags for validation are hashed cryptographically into the cache's key
3842018-03-11T23:24:28 <sipa> so at worst there is a discrepancy, and the entry just won't be found
3852018-03-11T23:26:11 <eklitzke> is it not a probabilistic data structure?
3862018-03-11T23:28:14 <sipa> it's probabilistic in the other direction
3872018-03-11T23:28:28 <eklitzke> i see
3882018-03-11T23:29:09 <sipa> and if you accept the chance of hash collisions on sha256, it also has a chance for false positives
3892018-03-11T23:29:20 <sipa> but if those are a concern, we have bigger proble.s
3902018-03-11T23:31:09 <eklitzke> i'm assuming that the problem of finding a sha256 collision is more difficult than finding a collision in the cache
3912018-03-11T23:31:36 <sipa> hmm?
3922018-03-11T23:31:42 <sipa> the cache stores the full hash
3932018-03-11T23:32:00 <eklitzke> ah
3942018-03-11T23:32:01 <sipa> its location can have collisions, in whicb case an entry will be evicted
3952018-03-11T23:32:16 <sipa> but that still only results in a false negative
3962018-03-11T23:32:42 <eklitzke> i had difficulty finding the original PR, it looks like the one that was merged on github is not the first PR put up (which probably has more of these details)
3972018-03-11T23:33:19 <eklitzke> actually i might be wrong, maybe this description is using "original PR" to refer to the unsquashed version
3982018-03-11T23:33:24 <eklitzke> https://github.com/bitcoin/bitcoin/pull/8895
3992018-03-11T23:34:13 <sipa> that PR is about the sigcache
4002018-03-11T23:34:22 <sipa> which is distinct from the scriptcache
4012018-03-11T23:34:27 <sipa> i think
4022018-03-11T23:34:33 <sipa> i'm not sure anymore
4032018-03-11T23:38:16 <eklitzke> ok i think i understand it now
4042018-03-11T23:39:10 <eklitzke> it's not really like a bloom filter because the original element is retained, and contains() does an == check if it finds an item in the cache, which is your point about it being probabilistic in the other direction
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4062018-03-11T23:39:52 <eklitzke> so it just relies on sha256 of the item in the cache being unique
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4102018-03-11T23:41:13 <sipa> it does a few interesting things
4112018-03-11T23:41:29 <sipa> every element can be in 8 different valid locations
4122018-03-11T23:41:48 <sipa> and it gets moved around to make space for new ones, unless a cycle forms
4132018-03-11T23:42:21 <sipa> and when an item is marked as expired, it it retained in the cache (and findable) but just available for overwriting
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