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 36 2017-04-27T01:41:24  <mchrosto> Trying to build master, Ubuntu 16.04, I've had to compile my own Boost to avoid undefined __cxx11::string references. Looks like I have to do the same for ZMQ. Have I made a mistake somewhere or might it make sense to update the build-unix.md for more recent Ubuntu.
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 52 2017-04-27T02:15:47  <Rozal> So is this vitamin thing bad for bitcoin
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127 2017-04-27T10:11:00  <edcba> rescan is that slow ??
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129 2017-04-27T10:12:12  <edcba> oh no ok progress=0.02 means 2% not 0.02% :)
130 2017-04-27T10:12:51  <edcba> well it's still not that fast
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135 2017-04-27T11:08:42  <czaanja_> Hello, please is there a way to tell bitcoind to store transactions with unconfirmed inputs in the memory pool? For example this transaction https://blockchain.info/tx/aca740da21490448f73a6abdc6f964d36ff29a1c46af188c13d5cc9885a22495 . I can see that transaction on blockchain.info, but can not see it with bitcoin-cli getrawtransaction <txid> on my local bitcoin core ( even with with txindex=1 )
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148 2017-04-27T11:58:54  <afk11> czaanja_, your node might not have observed it over the p2p network. one reason it mightn't propagate is the awfully low fee paid on that transaction
149 2017-04-27T12:08:31  <edcba> fee are required to propagate now ?
150 2017-04-27T12:18:08  <afk11> edcba, he paid 8sat/b, most other txs are paying around 100
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152 2017-04-27T12:22:17  <edcba> but for propagation you don't really need fee ?
153 2017-04-27T12:22:34  <edcba> i mean it may never be mined but still seen by network ?
154 2017-04-27T12:22:43  <edcba> mined/validated
155 2017-04-27T12:25:17  <afk11> hmm, actually, it looks like that transaction is also a part of a chain of unconfirmed transactions. it's highly likely that's part of the reason.
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163 2017-04-27T12:37:02  <edcba> why did i get some btc on old addr ?
164 2017-04-27T12:37:27  <edcba> is that part of a privacy attack ?
165 2017-04-27T12:38:44  <czaanja_> afk11: Yes, thanks for the reply, actually I realized it was discovered by my node, but i think i restarted it later, so it wanished from the mempool.
166 2017-04-27T12:39:31  <edcba> ok looks like it https://www.reddit.com/r/Bitcoin/comments/3a1hte/psa_dust_being_sent_to_your_addresses_might_help/
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168 2017-04-27T12:40:04  <czaanja_> afk11: But some transactions does not really get to my node. Is there any solution to make the chance of geting note of it higher? Raising the connections?
169 2017-04-27T12:48:34  <edcba> is your node 24/7 ?
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182 2017-04-27T13:34:11  <edcba> about merge avoidance, currently if i have 3 addr with 10 10.0001 and .1 COIN, will sending 10.0001 result in picking all from same addr ?
183 2017-04-27T13:41:11  <instagibbs> edcba, depends on the coin selection strategy. There are lots of factors. But the smart thing would be to just use the exact-matching one(assuming fees are 0 or included)
184 2017-04-27T13:43:24  <edcba> well i mean using latest bitcoin core
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186 2017-04-27T13:43:46  <edcba> reading SelectCoinsMinConf right now but i'm not sure yet
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189 2017-04-27T13:48:01  <instagibbs> so the first iteration will assume no fee(hahaha) and do an exact match first
190 2017-04-27T13:48:23  <instagibbs> it will then do a fee estimation for that size and try again
191 2017-04-27T13:48:50  <instagibbs> will very likely end up picking 2 inputs that suffice
192 2017-04-27T13:50:03  <edcba> well my example was with fee included of course lol
193 2017-04-27T13:50:31  <instagibbs> ah ok, then it should exact match
194 2017-04-27T13:51:05  <edcba> how the fuck there are still a lot of magic values in that source code
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198 2017-04-27T14:02:57  <inersha> If hard forking wasn't an issue, would it have been a lot easier to fix transaction malleability by ignoring all the scriptSig fields in transactions when creating the TXID?
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217 2017-04-27T15:57:13  <czaanja_> edcba: Yes, the node is 24/7. Now for example this transaction https://blockchain.info/tx/9daadfbfcedbae164caf57b2dcbfb68e1eceb0eb911dc3e245c9444920c4dc24 I can not see either. I guess it is due to the unconfirmed inputs, since the fee seems to be average.
218 2017-04-27T16:00:22  <abpa> Too-long chains aren't allowed
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221 2017-04-27T16:18:40  <czaanja_> abpa: So am i getting it right that the transaction is not being re-broadcasted and does not even get to my node? Or it got to my node, but it ignores it?
222 2017-04-27T16:19:44  <abpa> Actually it looks like another issue
223 2017-04-27T16:19:59  <abpa> These all build on an unconfirmed 3 sat/byte tx
224 2017-04-27T16:20:11  <abpa> That won't relay well
225 2017-04-27T16:21:22  <edcba> how much time that addr has been reused ?
226 2017-04-27T16:22:01  <edcba> 9429 transactions ?
227 2017-04-27T16:23:05  <czaanja_> abpa: So the transaction is not even being relayed and blockchain.info can see it only because it is connected to to huge amount of nodes?
228 2017-04-27T16:23:11  <abpa> Probably
229 2017-04-27T16:23:24  <czaanja_> edcba: Which address do you mean?
230 2017-04-27T16:23:28  <abpa> Relayed is not a black/white thing
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232 2017-04-27T16:23:36  <abpa> Many nodes will just ignore super low fee transactions because they don't have space in memory for all of them
233 2017-04-27T16:23:58  <edcba> wait i'm lost in blockchain UI
234 2017-04-27T16:24:20  <czaanja_> abpa: Ok, I got this. I am jsut wondering if there is anything I can do about beeing able to know about such a transactions.
235 2017-04-27T16:24:45  <abpa> You can rebroadcast yourself and add more fees but then you pay for the entire chain
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237 2017-04-27T16:24:48  <edcba> https://blockchain.info/address/19xuKwgfphk3mMaN7TEYYYULLou671KxfC
238 2017-04-27T16:25:27  <czaanja_> edcba: Yes I can see that, but I dont know.
239 2017-04-27T16:26:07  <czaanja_> Oh, jsut to make myself clear. I did not made that transaction. Im just wondering how to get known about the transaction.
240 2017-04-27T16:26:10  <edcba> so it's a transaction of unconfirmed input * 2 ?
241 2017-04-27T16:27:12  <edcba> i wonder if clients retransmit all needed transactions for his addr or just those done by himself
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243 2017-04-27T16:27:40  <abpa> I think it's just their own ones
244 2017-04-27T16:27:49  <abpa> And they will be re-transmitted every x hours
245 2017-04-27T16:28:01  <czaanja_> edcba: Yes it seems to be a chain of unconfirmed transactions as abpa mentioned. And so i see that this might be the reason why I can not see it.
246 2017-04-27T16:28:02  <abpa> You can manually re-broadcast someone else's tx
247 2017-04-27T16:28:14  <czaanja_> But anyway thank you guys a lot for your help.
248 2017-04-27T16:28:54  <czaanja_> abpa: Yes I can, but I can not if I am not even notified that some transaction arrived, which is the issue I am having.
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258 2017-04-27T17:18:41  <rugu> Hey, I am using bitcoin-cli to get the transaction details which shows me the outputs, but now I am not sure how to figure out which UTXOs were actually consumed to produce that transaction. Could someone help me out please?
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264 2017-04-27T17:31:29  <arubi> rugu, it also shows you the input txids and indexes, so getrawtransaction one of those input txids and at that index you will have the output that was redeemed
265 2017-04-27T17:31:48  <rugu> can I see this on a block explorer?
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267 2017-04-27T17:32:18  <arubi> I don't like the way block explorers show stuff, but I guess you can sort of figure it out from a block explorer, yea
268 2017-04-27T17:32:40  <rugu> i am writing a custom script to index UTXOs by address
269 2017-04-27T17:32:54  <rugu> I know there are other options, but wanted to do it myself
270 2017-04-27T17:33:18  <arubi> okay, I never tried doing that myself
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283 2017-04-27T18:08:23  <mappum> it has been 20 mins and my email to the mailing list hasn't gone through. does it have to be approved by a moderator first?
284 2017-04-27T18:10:40  <abpa> Maybe it was flagged as spam
285 2017-04-27T18:10:43  <mappum> nvm, just went through
286 2017-04-27T18:16:53  <arubi> mappum, nice :)  I'm half way, looks very cool.  might be even a bit cheaper with a 0 amount output for the assertion
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290 2017-04-27T18:22:34  <mappum> arubi: true, but if Output 1 of the Funding tx is 0 amount then it would be nonstandard and not get relayed. and it's small enough not to be a big deal (it could be even smaller, i just couldn't remember what the dust amount was)
291 2017-04-27T18:23:05  <arubi> mappum, no outputs is invalid in itself (for the assertion redemption)
292 2017-04-27T18:23:12  <arubi> but still, I think there's another issue
293 2017-04-27T18:23:31  <arubi> I mean, anyone could just double spend the bounty before it's claimed
294 2017-04-27T18:23:33  <arubi> segwit or not
295 2017-04-27T18:23:43  <arubi> (err, the signer.  not anyone)
296 2017-04-27T18:23:53  <arubi> any signer, or contributor
297 2017-04-27T18:24:25  <mappum> oh really? wouldn't using CHECKLOCKTIMEVERIFY in the outputs prevent that?
298 2017-04-27T18:25:18  <arubi> oh I think I thought you meant using nlocktime for locking it, not cltv.  will re-read.
299 2017-04-27T18:25:24  <arubi> s/I think//
300 2017-04-27T18:26:02  <mappum> the contributor can't spend from the Funding TX until H, and the miner of block H can ensure their bounty payout gets included instead of some other tx signed by the contributor
301 2017-04-27T18:26:27  <mappum> the funding tx is broadcast at setup time, the others are locked until H
302 2017-04-27T18:26:28  <arubi> I mean, something is a bit off for me, but I might just be confused here.  some non segwit output is signed along a segwit one.  in case segwit doesn't go through, the signature from the segwit output isn't really important
303 2017-04-27T18:27:18  <mappum> since the signature given to the miner uses SIGHASH_ALL, the sig for the non-segwit input is invalid if the segwit input is invalid
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305 2017-04-27T18:27:45  <arubi> yes but that output is spendable without that segwit sig if it doesn't go through
306 2017-04-27T18:30:22  <arubi> again, I might be confused.  it's been a long day and I only read your post once.  I'll try it out locally and see :)
307 2017-04-27T18:31:06  <mappum> i'll double check to make sure i'm understanding the BIP 143 stuff correctly
308 2017-04-27T18:31:23  <arubi> cheers, I'll do some more reading here
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314 2017-04-27T18:40:16  <mappum> crap, i think you're right. the segwit output will be anyone-can-spend, so the non-segwit sig is still valid
315 2017-04-27T18:41:01  <arubi> right, seems so
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317 2017-04-27T18:41:16  <mappum> idk how i missed that :(
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319 2017-04-27T18:41:35  <arubi> as long as you're frowning, the checksigverify would also fail :(
320 2017-04-27T18:41:48  <arubi> use checksig if it's the final op being done.  you want a TRUE on stack
321 2017-04-27T18:42:41  <mappum> ah, right
322 2017-04-27T18:43:33  <arubi> I think it's a cool concept though.  it's ironic that with segwit, these kind of clever scripts and transactions would work out of the box
323 2017-04-27T18:44:02  <arubi> I mean eventually, when we get an upgrade to sighash :)
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326 2017-04-27T19:00:40  *** praxeology has joined #bitcoin-dev
327 2017-04-27T19:01:30  <praxeology> Did I come here at the right time to witness a meeting?
328 2017-04-27T19:02:40  <arubi> looking for #bitcoin-core-dev ?
329 2017-04-27T19:02:54  <arubi> it's starting now
330 2017-04-27T19:03:00  <jonasschnelli> praxeology: yes. #bitcoin-core-dev
331 2017-04-27T19:03:15  <edcba> i didn't know about this one
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360 2017-04-27T20:53:34  <mchrosto> Hi, I'm trying to compile master on Ubuntu 16.04 and am finding I need to recompile many dependencies to avoid 'defined reference to __cxx11' namespace errors. Does it sound like I missed something or is this expected?
361 2017-04-27T20:53:45  <mchrosto> s/defined/undefined
362 2017-04-27T20:58:02  <mchrosto> omfg, Ubuntu was grabbing GCC 5.x from while I had 4.x in /usr/local... nevermind
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