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joined #bitcoin-wizards 06:02 -!- p15x [~p15x@182.50.108.90] has joined #bitcoin-wizards 06:10 -!- hearn [~mike@185.25.95.132] has quit [Ping timeout: 256 seconds] 06:17 -!- Xh1pher [~Xh1pher@pD9E38632.dip0.t-ipconnect.de] has joined #bitcoin-wizards 06:18 -!- hearn [~mike@185.25.95.132] has joined #bitcoin-wizards 06:22 -!- antgreen [~user@CPE687f74122463-CM84948c2e0610.cpe.net.cable.rogers.com] has quit [Ping timeout: 276 seconds] 06:29 -!- dc17523be3 [~unknown@193.138.219.233] has quit [Ping timeout: 244 seconds] 06:29 -!- c0rw1n [~c0rw1n@92.74-67-87.adsl-dyn.isp.belgacom.be] has quit [] 06:30 -!- c0rw1n [~c0rw1n@92.74-67-87.adsl-dyn.isp.belgacom.be] has joined #bitcoin-wizards 06:31 -!- dc17523be3 [unknown@gateway/vpn/mullvad/x-ghtslnxzuyliyrfa] has joined #bitcoin-wizards 06:32 < kanzure> someone suggests designing a hash function that uses a local lookup table to make the hash constrained by memory-bandwidth. he claims that this prevents asics (which i doubt.. why can't i make high-memory-bandwidth asics?) (plus i'm not convinced that's desirable). 06:34 < narwh4l> kanzure: has he not heard of the hash functions that rely on memory bandwidth? 06:34 -!- terpo [~terpo@81-64-36-59.rev.numericable.fr] has quit [] 06:34 < narwh4l> kanzure: prevent asics? lol 06:35 < kanzure> well, i certainly haven't looked at memory-bandwidth-constrained hash functions yet 06:35 <@gmaxwell> kanzure: see descussions of the bcrypt like sboxes in yescrypt... but the argument is kinda weak. 06:36 -!- nwilcox [~nwilcox@68.233.157.2] has joined #bitcoin-wizards 06:38 -!- Guyver2 [~Guyver2@guyver2.xs4all.nl] has joined #bitcoin-wizards 06:39 -!- www [~v3@p50894582.dip0.t-ipconnect.de] has quit [Ping timeout: 252 seconds] 06:47 -!- p15 [~p15@114.248.213.88] has quit [Max SendQ exceeded] 06:47 -!- StephenM347 [~stephenm3@static-64-223-246-218.port.east.myfairpoint.net] has joined #bitcoin-wizards 06:49 -!- p15 [~p15@114.248.213.88] has joined #bitcoin-wizards 06:52 -!- antgreen [user@nat/redhat/x-rqvlnohfmbxprhcq] has joined #bitcoin-wizards 06:56 -!- davi [~davi@gnu/davi] has joined #bitcoin-wizards 07:00 -!- priidu [~priidu@unaffiliated/priidu] has quit [Ping timeout: 256 seconds] 07:04 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has quit [Quit: This computer has gone to sleep] 07:06 -!- damethos [~damethos@unaffiliated/damethos] has quit [Quit: Bye] 07:11 -!- p15x_ [~p15x@182.50.108.58] has joined #bitcoin-wizards 07:13 -!- p15x [~p15x@182.50.108.90] has quit [Ping timeout: 265 seconds] 07:15 -!- p15x_ [~p15x@182.50.108.58] has quit [Max SendQ exceeded] 07:17 -!- p15x [~p15x@182.50.108.58] has joined #bitcoin-wizards 07:18 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has joined #bitcoin-wizards 07:19 -!- b_lumenkraft [~b_lumenkr@unaffiliated/b-lumenkraft/x-4457406] has joined #bitcoin-wizards 07:19 -!- p15x [~p15x@182.50.108.58] has quit [Max SendQ exceeded] 07:20 -!- p15x [~p15x@182.50.108.58] has joined #bitcoin-wizards 07:27 -!- zooko [~user@2600:100e:b01c:8a50:40a8:583d:ff73:a86d] has joined #bitcoin-wizards 07:28 -!- p15x [~p15x@182.50.108.58] has quit [Max SendQ exceeded] 07:32 -!- p15x [~p15x@182.50.108.58] has joined #bitcoin-wizards 07:33 -!- www [~v3@p50894582.dip0.t-ipconnect.de] has joined #bitcoin-wizards 07:34 -!- p15x [~p15x@182.50.108.58] has quit [Max SendQ exceeded] 07:35 -!- p15x [~p15x@182.50.108.58] has joined #bitcoin-wizards 07:41 -!- Quanttek [~quassel@ip1f10af17.dynamic.kabel-deutschland.de] has joined #bitcoin-wizards 07:43 -!- p15x_ [~p15x@182.50.108.18] has joined #bitcoin-wizards 07:44 -!- p15x [~p15x@182.50.108.58] has quit [Ping timeout: 244 seconds] 07:44 -!- p15_ [~p15@114.248.211.177] has joined #bitcoin-wizards 07:45 -!- p15 [~p15@114.248.213.88] has quit [Ping timeout: 276 seconds] 07:48 -!- p15x_ [~p15x@182.50.108.18] has quit [Max SendQ exceeded] 07:50 -!- p15x [~p15x@182.50.108.18] has joined #bitcoin-wizards 07:58 -!- priidu [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 07:59 -!- dgenr8 [~dgenr8@unaffiliated/dgenr8] has quit [Read error: Connection reset by peer] 08:00 -!- dgenr8 [~dgenr8@unaffiliated/dgenr8] has joined #bitcoin-wizards 08:02 -!- Emcy [~MC@cpc3-swan1-0-0-cust996.7-3.cable.virginm.net] has joined #bitcoin-wizards 08:02 -!- Emcy [~MC@cpc3-swan1-0-0-cust996.7-3.cable.virginm.net] has quit [Changing host] 08:02 -!- Emcy [~MC@unaffiliated/mc1984] has joined #bitcoin-wizards 08:05 -!- www1 [~v3@p50894207.dip0.t-ipconnect.de] has joined #bitcoin-wizards 08:06 -!- www [~v3@p50894582.dip0.t-ipconnect.de] has quit [Ping timeout: 252 seconds] 08:08 < StephenM347> Does BIP62 cover addition of OP_NOPs into the scriptSig? 08:09 < StephenM347> I suppose this counts as a 'non-push operation' 08:10 -!- gill3s [~gill3s@pat35-3-82-245-143-153.fbx.proxad.net] has quit [Quit: My Mac has gone to sleep. ZZZzzz…] 08:10 -!- hearn [~mike@185.25.95.132] has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…] 08:11 -!- gill3s [~gill3s@pat35-3-82-245-143-153.fbx.proxad.net] has joined #bitcoin-wizards 08:12 -!- www1 [~v3@p50894207.dip0.t-ipconnect.de] has quit [Ping timeout: 252 seconds] 08:12 -!- www [~v3@p50895494.dip0.t-ipconnect.de] has joined #bitcoin-wizards 08:16 -!- p15x [~p15x@182.50.108.18] has quit [Max SendQ exceeded] 08:18 -!- p15x [~p15x@182.50.108.18] has joined #bitcoin-wizards 08:18 -!- www1 [~v3@p50894685.dip0.t-ipconnect.de] has joined #bitcoin-wizards 08:19 -!- www [~v3@p50895494.dip0.t-ipconnect.de] has quit [Ping timeout: 276 seconds] 08:22 -!- damethos [~damethos@unaffiliated/damethos] has joined #bitcoin-wizards 08:23 -!- zooko [~user@2600:100e:b01c:8a50:40a8:583d:ff73:a86d] has quit [Ping timeout: 256 seconds] 08:24 -!- hearn [~mike@185.25.95.132] has joined #bitcoin-wizards 08:27 < wumpus> StephenM347: yes 08:33 < wumpus> only direct pushes, OP_PUSHDATAn, OP_n are considered push opcodes, see CScript::IsPushOnly 08:37 -!- robogoat [~robogoat@c-24-126-240-124.hsd1.ga.comcast.net] has quit [Ping timeout: 276 seconds] 08:37 < StephenM347> wumpus: Just double checking, thanks 08:38 -!- robogoat [~robogoat@c-24-126-240-124.hsd1.ga.comcast.net] has joined #bitcoin-wizards 08:41 -!- c-cex-yuriy [uid76808@gateway/web/irccloud.com/x-ieqxebikagiotyjn] has joined #bitcoin-wizards 08:41 -!- AaronvanW [~ewout@unaffiliated/aaronvanw] has quit [Ping timeout: 246 seconds] 08:44 -!- priidu [~priidu@unaffiliated/priidu] has quit [Ping timeout: 252 seconds] 08:45 -!- cosmo [~james@unaffiliated/cosmo] has joined #bitcoin-wizards 08:50 -!- p15_ [~p15@114.248.211.177] has quit [Max SendQ exceeded] 08:51 -!- p15 [~p15@182.50.108.73] has joined #bitcoin-wizards 08:51 -!- priidu [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 08:53 -!- lnsybrd [~lnsybrd@fwsm-io-azp-dmz.phx1.ip.io.com] has joined #bitcoin-wizards 08:56 -!- zooko [~user@210.sub-70-196-207.myvzw.com] has joined #bitcoin-wizards 09:02 -!- p15 [~p15@182.50.108.73] has quit [Quit: My Mac has gone to sleep. 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timeout: 240 seconds] 12:02 -!- nwilcox [~nwilcox@68.233.157.2] has joined #bitcoin-wizards 12:08 < kanzure> petertodd: can you show me "recursive snarks" stuff if any exists? 12:08 -!- spinza [~spin@197.89.39.101] has quit [Excess Flood] 12:09 -!- spinza [~spin@197.89.39.101] has joined #bitcoin-wizards 12:09 < amiller> kanzure, do you want papers? 12:09 < amiller> http://eprint.iacr.org/2012/095 Recursive Composition and Bootstrapping for SNARKs and Proof-Carrying Data 12:10 < amiller> this one lays out the basic theory for it but not necessarily practical 12:10 < amiller> https://eprint.iacr.org/2014/976 Geppetto: Versatile Verifiable Computation 12:11 < amiller> this does *one layer* of snark composition... it has an inner snark and an outer snark... its practical and efficient but no code is released yet (the author is nice and will probably release it soon) 12:11 < amiller> https://eprint.iacr.org/2014/595 Scalable Zero Knowledge via Cycles of Elliptic Curves 12:13 < kanzure> i will always take papers 12:13 < amiller> this one finds parameters for arbitrary recursive composition.... it's about finding two related elliptic curves, such that you can run the snark algorithm for B in the exponent of curve A, and vice versa.... the concrete performance is a lot worse than geppetto but you can do as many layers as yo uawnt 12:15 < amiller> i have heard that there is recursive composition as per the 2014/595 paper already implemented in libsnark, but I can't see it. maybe it's not released yet. 12:15 < kanzure> unrelated, but have you looked at sequential abbreviated signatures before? 12:17 < kanzure> oh strange; for some reason i was not aware that libsnark has active development. 12:17 < kanzure> (just fetched their latest commits) 12:18 -!- rht__ [uid86914@gateway/web/irccloud.com/x-ntdctdlmeyzbljai] has quit [Quit: Connection closed for inactivity] 12:22 < amiller> yeah, libsnark is definitely under active development 12:22 * Luke-Jr wonders how long until there's a sandbox that can just execute snarks <.< 12:23 < amiller> Luke-Jr, ive been working on that actually 12:24 < zooko> ☺ 12:25 -!- Guest88601 [~jae@c-50-185-138-22.hsd1.ca.comcast.net] has quit [Remote host closed the connection] 12:25 -!- lnsybrd [~lnsybrd@jsr.6502.ws] has quit [Ping timeout: 276 seconds] 12:25 -!- lnsybrd [~lnsybrd@fwsm-io-azp-dmz.phx1.ip.io.com] has joined #bitcoin-wizards 12:26 -!- Tebbo [~Jerry`@ip72-211-88-176.no.no.cox.net] has joined #bitcoin-wizards 12:29 -!- jae [~jae@c-50-185-138-22.hsd1.ca.comcast.net] has joined #bitcoin-wizards 12:29 -!- priidu [~priidu@unaffiliated/priidu] has joined #bitcoin-wizards 12:29 -!- jae is now known as Guest18856 12:29 -!- priidu [~priidu@unaffiliated/priidu] has quit [Max SendQ exceeded] 12:31 -!- antanst [~Adium@adsl-142.176.58.227.tellas.gr] has quit [Quit: Leaving.] 12:31 -!- mjerr [~mjerr@p578EB3B1.dip0.t-ipconnect.de] has quit [Ping timeout: 255 seconds] 12:32 -!- priidu [~priidu@unaffiliated/priidu] has joined 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[~mjerr@p578EB3B1.dip0.t-ipconnect.de] has quit [Remote host closed the connection] 13:55 -!- mjerr [~mjerr@p578EB3B1.dip0.t-ipconnect.de] has joined #bitcoin-wizards 14:00 -!- AaronvanW [~ewout@unaffiliated/aaronvanw] has joined #bitcoin-wizards 14:00 -!- hearn [~mike@84-75-197-78.dclient.hispeed.ch] has quit [Read error: Connection reset by peer] 14:00 -!- hearn [~mike@84-75-197-78.dclient.hispeed.ch] has joined #bitcoin-wizards 14:01 -!- Guest75477 [~jae@c-50-185-138-22.hsd1.ca.comcast.net] has quit [Remote host closed the connection] 14:05 -!- dEBRUYNE_ [~dEBRUYNE@239-196-ftth.onsbrabantnet.nl] has joined #bitcoin-wizards 14:05 -!- Burrito [~Burrito@unaffiliated/burrito] has joined #bitcoin-wizards 14:07 -!- hearn [~mike@84-75-197-78.dclient.hispeed.ch] has quit [Quit: My MacBook Pro has gone to sleep. ZZZzzz…] 14:07 -!- dEBRUYNE [~dEBRUYNE@239-196-ftth.onsbrabantnet.nl] has quit [Ping timeout: 255 seconds] 14:12 -!- jmcn [~jamie@2.24.158.81] has joined #bitcoin-wizards 14:14 -!- jmcn_ [~jamie@2.24.158.70] has quit [Ping timeout: 276 seconds] 14:18 -!- lnsybrd [~lnsybrd@fwsm-io-azp-dmz.phx1.ip.io.com] has quit [Quit: lnsybrd] 14:18 -!- mjerr [~mjerr@p578EB3B1.dip0.t-ipconnect.de] has quit [Ping timeout: 256 seconds] 14:24 < theymos> weex, maaku: BitcoinJ only connects to nodes returned by the DNS seeds, so if you ensure that all of the DNS seeds return trustworthy peers on the right side of the fork, this'll protect most SPV wallets. 14:26 -!- jae [~jae@c-50-185-138-22.hsd1.ca.comcast.net] has joined #bitcoin-wizards 14:26 -!- ThomasV [~ThomasV@unaffiliated/thomasv] has quit [Ping timeout: 265 seconds] 14:26 -!- jae is now known as Guest33440 14:28 < phantomcircuit> theymos, that's hilariously the same security model as a bunch of the PoS things 14:28 < phantomcircuit> "if the first node you hear about is trustworthy then you're securE!" 14:28 < phantomcircuit> k 14:29 < phantomcircuit> i assume you're not seriously proposing that as a valid security model :) 14:29 -!- GAit [~lnahum@2-230-161-158.ip202.fastwebnet.it] has joined #bitcoin-wizards 14:30 -!- GAit [~lnahum@2-230-161-158.ip202.fastwebnet.it] has quit [Read error: Connection reset by peer] 14:31 -!- GAit [~lnahum@2-230-161-158.ip202.fastwebnet.it] has joined #bitcoin-wizards 14:32 < theymos> phantomcircuit: It's not good, but that's what BitcoinJ actually does now. So it's an option until that's fixed. 14:33 < theymos> Fixing it is more difficult than it looks at first because SPV clients have less ability to detect bad peers. 14:34 < phantomcircuit> theymos, i've actually been arguing recently that there basically shouldn't be any SPV nodes as they exist today 14:34 -!- AnoAnon [~AnoAnon@197.39.243.143] has joined #bitcoin-wizards 14:34 < theymos> What do you propose as an alternative? 14:34 -!- AnoAnon [~AnoAnon@197.39.243.143] has quit [Read error: Connection reset by peer] 14:35 < phantomcircuit> theymos, start with a pure spv node and then upgrade the security of the installation overtime 14:35 < phantomcircuit> ie 14:35 < phantomcircuit> first spv checks 14:36 < phantomcircuit> then sanity check all blocks 14:36 -!- antgreen [user@nat/redhat/x-iovcjypitdyuebtw] has quit [Ping timeout: 276 seconds] 14:36 < phantomcircuit> saving only the hash of the last blocks you checked 14:36 -!- tromp_ [~tromp@rtc35-195.rentec.com] has quit [Read error: Connection reset by peer] 14:36 < phantomcircuit> congrats you've now managed to significantly improve security without storing much of anything 14:37 < phantomcircuit> the key is to note that running most of the sanity checks like maximum blocksize are independent of each other 14:38 < phantomcircuit> brb 14:39 < theymos> That's a good idea. Probably miners should commit to that sort of "sanity" stuff by including it in their coinbase transaction or something. 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17:18 < maaku> i mean it's a good idea, but there's an engineering challenge there 17:18 < rusty> maaku: best effort; but I think it's kind of a ratchet as more people do this. 17:18 <@gmaxwell> certantly easy to do that in pruned nodes; (though random blocks by themselves are not quite ideal as you have a discovery problem) 17:19 <@gmaxwell> rusty: with the bitcoin commitment structure there is almost nothing to can verify statelessly like that, at least not without huge overhead-- can't verify signatures or fees or the coinbase output amount. :( 17:19 -!- bbhank [689ce4b5@gateway/web/freenode/ip.104.156.228.181] has quit [Quit: Page closed] 17:19 <@gmaxwell> this old page https://en.bitcoin.it/wiki/User:Gmaxwell/features#Proofs walks over some of that (I may have shown that to you before) 17:19 < rusty> gmaxwell: sure, but you can provide proofs if future blocks have double-spends. 17:20 < maaku> rusty: I mean, for a given input all you have is the txid hash of the input. i suppose you could build a bloom filter of all the inputs to the block and do a bloom filter "wallet" sync. 17:20 < maaku> I shudder to think what that do to full nodes resource usage though :\ 17:21 < rusty> maaku: yeah, don't do that. But you'd need something like that to get txs which spend from your adopted block(s). 17:21 < maaku> wait duh bloom filters are over scriptPubKeys not txids 17:21 -!- Zooko-phone [~androirc@2600:100e:b015:22f0:c16d:2433:700a:5f4] has joined #bitcoin-wizards 17:21 <@gmaxwell> rusty: well my point at that page was less the random checking and more the random verification a check, I was still assuming someone somehere ran a (pruned) full node and would notice the invalidity and then it would propagate. 17:22 -!- cryptonaut [~cryptonau@198.8.80.44] has joined #bitcoin-wizards 17:22 -!- MAKOHYPE is now known as bosnia 17:22 <@gmaxwell> but indeed some kind of filtering could make actual fraud discovery also perhaps work. 17:22 -!- cryptonaut is now known as Guest8949 17:22 < rusty> gmaxwell: I'm trying to push it to the extreme, where SPV nodes can fill archive and fraud proof requirements which currently require full nnodes. 17:23 < maaku> rusty: I think that's the desired end-state of pruned nodes 17:23 < rusty> gmaxwell: not sure it's possible, if most nodes won't relay txs to you they're not personally interested in though. 17:24 < rusty> maaku: yeah, and I guess the "last N blocks" is the thing you want assured in *practice*. 17:25 < maaku> so with txout commitments that's the goal -- you sync utxo state and work your way backwards N blocks 17:28 < rusty> maaku: That would be nice. adopt-a-block might still make sense for archival purposes. But as gmaxwell said, discoverability problem. 17:29 <@gmaxwell> well I've suggested before that listening nodes could advertise a single short nonce and a size, and from that you can compute at any time what block range(s) they will have. 17:29 <@gmaxwell> which solves discoverability. 17:29 <@gmaxwell> but I was thinking that more in terms of pruned full nodes, not SPV adopt a block. 17:30 < akrmn> rusty: that's why I'm telling people subchains are good for scaling (you can constraint outputs to subchains). But still waiting for sipa's response to that. 17:31 < akrmn> Mike Hearn suggested SPV some storing random subsets of blocks but I doubt that would be reliable. 17:31 < rusty> gmaxwell: yeah, you could still hack it by relaying requests (and results) I guess. Might have to if SPV nodes are generally not listening nodes. 17:31 < akrmn> *SPV nodes 17:31 -!- hearn [~mike@84-75-197-78.dclient.hispeed.ch] has quit [Quit: Textual IRC Client: www.textualapp.com] 17:32 < rusty> maaku: BTW, I re-read my notes on SPV proof minimization. My conclusion was that it's far easier if we select a point to optimize for; I was using the genesis block but that's not actually what we want. 17:33 < rusty> maaku: it's an engineering question, really. 144 blocks ago? 1008 blocks? 17:33 < moa> pruned nodes could keep last-120 plus adopt-N-blocks 17:35 <@gmaxwell> moa: bitcoin core won't even currently run without 288 of the most recent, fwiw. 17:36 < moa> oh right ... last-288 17:36 < moa> 120 is coinbase spend 17:36 -!- Zooko-phone [~androirc@2600:100e:b015:22f0:c16d:2433:700a:5f4] has quit [Ping timeout: 265 seconds] 17:37 < maaku> moa: 100 17:37 < moa> hah 17:41 < moa> is there any work done on researching UXTO distributions over block height? ... i.e. are some block 'eras' more uxto dense than others? 17:41 -!- afk11 [~thomas@46.7.4.219] has quit [Ping timeout: 265 seconds] 17:42 <@gmaxwell> very much so. 17:47 -!- eudoxia [~eudoxia@r179-24-151-151.dialup.adsl.anteldata.net.uy] has quit [Quit: Leaving] 17:51 < moa> som inherently not all blocks are 'equal' in the snese that some blocks have more value than others in terms of informational content 17:51 < moa> so not som 17:53 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has quit [Read error: Connection reset by peer] 17:54 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has joined #bitcoin-wizards 17:55 -!- afk11 [~thomas@108.61.123.72] has joined #bitcoin-wizards 17:59 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has quit [Read error: Connection reset by peer] 17:59 -!- wallet42 [~wallet42@85.100.40.253] has quit [Quit: Leaving.] 17:59 -!- jgarzik [~jgarzik@104-178-201-106.lightspeed.tukrga.sbcglobal.net] has joined #bitcoin-wizards 17:59 -!- jgarzik [~jgarzik@104-178-201-106.lightspeed.tukrga.sbcglobal.net] has quit [Changing host] 17:59 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has joined #bitcoin-wizards 18:01 -!- jgarzik [~jgarzik@unaffiliated/jgarzik] has quit [Read error: Connection reset by peer] 18:02 -!- jgarzik 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