#bitcoin-wizards on 2017-07-01 — irc logs at freenode.irclog.whitequark.org

2015-10-30 00:53 sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja

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00:33 <danrobinson> I'm guessing his "hack" is storing illegal data on the blockchain.

00:39 <danrobinson> Fits the ~$30 price tag (what other type of attack would be in that price range?), his use of the words "tragic" and "ugh", his evident awareness of OP_RETURN and not much beyond that

00:40 <danrobinson> And his subsequent claim that "it works on all of the alts as well"

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01:28 <gmaxwell> the poison is wrong!!!!!

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01:32 <sipa> ...?

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01:33 <midnightmagic> sipa: He's watching the CSW video. CSW misspelled 'Poisson' referring to the process.

01:34 <sipa> well, poisson is just french for fish

01:34 <sipa> some thing, really

01:34 <sipa> *same

01:36 <midnightmagic> Named after a French guy though isn't it?

01:36 <sipa> indeed

01:36 <sipa> the abbreviation CSW is confusing

01:36 <sipa> i keep thinking it's opcode

01:37 <sipa> like OP_VER

01:37 <midnightmagic> OP_AFFINITY_FRAUD

01:38 <waxwing> OP_CHECKSATOSHIWRIGHT always returns False

01:38 <kanzure> op_cantsignwrongkey

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02:29 <gmaxwell> not just misspelled, but also mispronounced many times. saying "the poison is wrong!"

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03:07 <gmaxwell> I wonder what my favorite part of the talk was, -- probably where he goes on claiming that quadratic sighashing was added recently because of "shit code" and then shows two different screenshots of the mempool descendant feerate tracking (obviously unrelated to transaction validation) which he found by searching for N^2 in the codebase (the search appears to be the prior tab up in the browser)--

03:07 <gmaxwell> an unrelated comment in txmempool.cpp mentions that the sanity tests are off by default because they have O(N^2) cost.

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03:09 <gmaxwell> He then appears to show a "fix" which is a one line change which does nothing but change a condition in an assert statement; which I believe would make the software instantly crash when checking is enabled.

03:09 <gmaxwell> e.g. changes assert(stepsSinceLastRemove < waitingOnDependants.size()); with assert(stepsSinceLastRemove > waitingOnDependants.size());

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03:18 <gmaxwell> ah no, sorry, he replaced it with a comparision with a constant-- that wouldn't crash but it doesn't do anything (size() on a list is O(1) in C++11)

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06:50 <Fibonacci12358> Hey Nerds! :D

06:51 <Fibonacci12358> I'm trying to figure out which side to support on the Fork. Any breakdown of the various features yet?

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07:00 <Fibonacci12358> Email me FibonacciCoins@gmail.com if you have any info thx

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08:11 <gmaxwell> runner up would have been the claim that "core" disabled opcodes (which were, in fact, disabled by Satoshi...)

08:15 <Dizzle> :D

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17:17 <draadpiraat[m]> https://pbs.twimg.com/media/DDonFTQXgAAqtB6.jpg this would need the "tempted" miner to have installed some type of software that accepts segwit blocks without the witness merkle tree, right?

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17:18 <sipa> segwit nodes require the witness to be present and valid

17:19 <sipa> in order to accept a block

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