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21 2017-08-31T01:55:22 <nreefode> hi all. I am writing an RPC to get up to speed with bitcoin-core. At some point I would like to be generating an empty (but valid) new block. CreateNewBlock pulls things out of the mempool, yes?
22 2017-08-31T01:57:09 <nreefode> I'm thinking I can add a flag to CreateNewBlock so that it does not call addPackageTxs, which it looks like is what's grabbing txs from the mempool
23 2017-08-31T02:01:20 <nreefode> oh you know what, the docs for addPackageTxs explicitly say "we don't remove transactions from the mempool as we select them for block inclusion"
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56 2017-08-31T04:18:40 <esotericnonsense> hm.
57 2017-08-31T04:18:41 * esotericnonsense is mucking around with wallet dev.
58 2017-08-31T04:18:41 <esotericnonsense> my 'random source' has given me a bip39 seed with three subsequent words identical.
59 2017-08-31T04:18:41 <esotericnonsense> :>
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184 2017-08-31T15:01:53 * esotericnonsense whacks his head against a wall
185 2017-08-31T15:02:29 <esotericnonsense> after multiple hours of trying to figure out why my bip32 derivation code is not working properly against the test vectors i decide to use a different base58 encoder
186 2017-08-31T15:02:45 <esotericnonsense> it was always fine
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211 2017-08-31T16:24:42 <dviola> hi
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213 2017-08-31T16:25:11 <dviola> I see my initial sync is going a bit slow today, I'm getting connection refused and such
214 2017-08-31T16:25:32 <dviola> 2017-08-31 16:23:35 Peer=5 is stalling block download, disconnecting
215 2017-08-31T16:25:33 <dviola> 2017-08-31 16:23:35 connect() to [2001:0:5ef5:79fb:14be:388:93d8:4eaf]:8333 failed: Network is unreachable (101)
216 2017-08-31T16:25:46 <dviola> in the debug.log
217 2017-08-31T16:25:57 <dviola> is it possible my ISP is messing with me?
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221 2017-08-31T16:30:15 <dviola> how do I know if my node is able to connect to other nodes?
222 2017-08-31T16:33:27 <dviola> I wonder if that time out is simply because my node can't be reached from outside
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227 2017-08-31T17:05:51 <dviola> looks like that was a connection to ipv6 and I can't use ipv6
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260 2017-08-31T18:29:39 <asimplecoder> hey
261 2017-08-31T18:29:43 <asimplecoder> anyone online?
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263 2017-08-31T18:30:45 <asimplecoder> i need some help with bitcoind
264 2017-08-31T18:32:55 <adiabat> asimplecoder: people are online, just ask, preambles etc are generally ignored here
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266 2017-08-31T18:34:15 <asimplecoder> i cant be able to figure out how to use bitcoind's sendrawtransaction
267 2017-08-31T18:34:17 <asimplecoder> bitcoin-cli sendrawtransaction mysignedtransactioninhex allowhighfees=false error: Error parsing JSON:allowhighfees=false
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269 2017-08-31T18:35:55 <adiabat> I think if you want allowhighfees, just put a true at the end?
270 2017-08-31T18:36:25 <esotericnonsense> looking at bip32 - am I correct in understanding that a hardened public child key cannot be obtained from any public parent key or set of
271 2017-08-31T18:37:08 <esotericnonsense> that is to say that it can only be derived by knowing some private parent key, determining the hardened private child key and then obtaining the point
272 2017-08-31T18:37:39 <adiabat> asimplecoder: as in, don't say allowhighfees=false, just put false after the hex string
273 2017-08-31T18:37:47 <asimplecoder> if i put true at the end i get:
274 2017-08-31T18:37:48 <asimplecoder> error code: -25 error message: Missing inputs
275 2017-08-31T18:38:04 <asimplecoder> same as with false
276 2017-08-31T18:38:16 <adiabat> asimplecoder: same? that's a different error
277 2017-08-31T18:38:31 <adiabat> try decoderawtransaction to see what's wrong with the tx
278 2017-08-31T18:38:42 <esotericnonsense> e.g. m/0'/0/0' pub _cannot_ be obtained from m/0'/0 pub nor m/0' pub nor m pub
279 2017-08-31T18:38:51 <esotericnonsense> you need any of those as prv
280 2017-08-31T18:39:22 <esotericnonsense> (this logically follows from bip32 CKD's, just confirming that I haven't missed something)
281 2017-08-31T18:40:22 <asimplecoder> its nothing wrong with the transaction
282 2017-08-31T18:42:34 <asimplecoder> http://dpaste.com/2T4S9N4.txt
283 2017-08-31T18:42:39 <asimplecoder> check it out^
284 2017-08-31T18:44:55 <adiabat> the missing inputs error means the inputs your trying to spend aren't found
285 2017-08-31T18:45:18 <adiabat> so the tx in isolation may be well formed, but the txo it's spending is gone
286 2017-08-31T18:45:45 <asimplecoder> so it might have been gone throw?
287 2017-08-31T18:46:29 <adiabat> the vin:txid:0 is probably not a utxo, you can query that with getrawtransaction
288 2017-08-31T18:46:36 <adiabat> (if you have txindex=1)
289 2017-08-31T18:46:40 <arubi> esotericnonsense, right, leafs on the same branch aren't related at all in any way
290 2017-08-31T18:47:11 <asimplecoder> no it got the bitcoin on it
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292 2017-08-31T18:47:43 <arubi> and specifically hardened paths can not be derived from non hardened paths
293 2017-08-31T18:47:50 <adiabat> asimplecoder: as a guess, bitcoin txids are "backwards", in that if you're writing your own stuff, the bytes have to be reversed
294 2017-08-31T18:48:25 <asimplecoder> yupp its a custom script
295 2017-08-31T18:48:45 <arubi> you can only go forward if you know the private key at all, and can only go backwards with a private key and a non hardened xpub
296 2017-08-31T18:49:06 <adiabat> the txid in the hex string going into decoderawtransaction is backwards from the hex string you'll see from the json output
297 2017-08-31T18:49:11 <esotericnonsense> arubi: well you can go forward from pub to pub with pub, just not to a hardened child
298 2017-08-31T18:49:23 <asimplecoder> i tried to push and i got the error "Validation Error: Insufficient fee. Minimum fee is 1 sat/B."
299 2017-08-31T18:49:29 <arubi> yea, that's right. on non hardened paths
300 2017-08-31T18:50:08 <arubi> sorry, can only go forwards to a hardened path*
301 2017-08-31T18:50:10 <adiabat> asimplecoder: reduce your output value a bit to up the fee
302 2017-08-31T18:50:11 <esotericnonsense> i'm unsure what you mean by on non hardened paths. it seems that i could go from pub m/0'/0 to pub m/0'/0/0 just fine.
303 2017-08-31T18:50:14 <esotericnonsense> yes, indeed
304 2017-08-31T18:50:28 <esotericnonsense> can only go forwards to a _non_hardened path :P
305 2017-08-31T18:50:41 <arubi> right, or a hardened path with knowing the xpub
306 2017-08-31T18:50:46 <arubi> errr
307 2017-08-31T18:50:47 <arubi> expriv
308 2017-08-31T18:51:07 <asimplecoder> whaaat "Parse: exception decoding Hex string: String index out of range: 381"
309 2017-08-31T18:51:54 <arubi> esotericnonsense, sorry, I'm only paying 20% attention, I'm confusing more than helping :) I think you got it
310 2017-08-31T18:52:06 <esotericnonsense> lol
311 2017-08-31T18:52:34 <arubi> try to look into the private key + parent xpub exploit, it's pretty cool
312 2017-08-31T18:53:37 <arubi> as when a private key on a non hardened path is revealed, then you can derive parent xrpiv's until the non hardened path ends. I think it's a cool way of applying bip32 stuff :)
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315 2017-08-31T18:56:45 <esotericnonsense> yeah, i've looked at that
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317 2017-08-31T18:58:24 <esotericnonsense> it seems interesting in that you can create a wallet that uses only hardened children, generating say the first 100 pub/priv when the parent is available, then removing the parent (or locking it behind a more secure encryption passphrase than the children)
318 2017-08-31T18:58:47 <esotericnonsense> you would only need to unlock the parent to generate more pub/priv
319 2017-08-31T19:00:16 <esotericnonsense> i suppose that actually you could just keep the parent encrypted (both pub and prv) and use non-hardened
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321 2017-08-31T19:01:26 <esotericnonsense> basically it's like having a non-HD wallet with a keypool, but the keypool can be refreshed deterministically, then again it would be easier to just use different parent paths for this sort of thing
322 2017-08-31T19:02:45 <asimplecoder> fucking hell error code: -25 error message: Missing inputs
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324 2017-08-31T19:09:53 <arubi> esotericnonsense, that's how core does it
325 2017-08-31T19:10:17 <arubi> it's hardened hd only, and you have to unlock the wallet when the keypool is depleted to generate more
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327 2017-08-31T19:11:05 <arubi> really you can just generate a huge amount the first time and keep encrypted forever, but it gets pretty bit quickly with private keys wrapped in secp256k1 asn.1 for each key :P
328 2017-08-31T19:12:00 <arubi> well maybe not quickly, iirc it's hundreds of megs at a million keys, which is actually 2 million because of the internal change
329 2017-08-31T19:14:36 <arubi> electrum uses non hardened derivation, different from core. really most wallets use bip44 or now starting to use bip49 which are both public derivation
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331 2017-08-31T19:17:11 <esotericnonsense> yes, i'm looking in to bip44/49 now. wanted to cover bip32 first to understand how it works. have reimplemented bip32 in python, passing the vectors
332 2017-08-31T19:18:08 <arubi> awesome. the newest added vector is due to a really nasty bugs some implementations had with a leading zero byte for private keys in the extended encoded, be sure to pass that ;)
333 2017-08-31T19:21:06 <esotericnonsense> yep, all checked out first time :)
334 2017-08-31T19:21:09 <esotericnonsense> (well, once I got any of them working)
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337 2017-08-31T19:26:01 <arubi> what are you using for ecc esotericnonsense ?
338 2017-08-31T19:26:40 <esotericnonsense> python-ecdsa, which seems quite slow. but this is kind of a toy for now.
339 2017-08-31T19:27:37 <esotericnonsense> (it is also slow because i don't optimize, I forget all previous results each time).
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341 2017-08-31T19:29:06 <arubi> cool, slow or not, if you're using it for exploring stuff, then the interesting bits are mostly interactive anyway :)
342 2017-08-31T19:29:41 <esotericnonsense> i did write the bits of ecdsa I needed for doing this years back but i've lost the code and it was horrendous anyway
343 2017-08-31T19:30:24 <arubi> heh yea, I wrote my own too. still using it. it's a lot slower than anything in python ever will be
344 2017-08-31T19:30:42 <arubi> mine is in gnu bc
345 2017-08-31T19:30:47 <esotericnonsense> lol
346 2017-08-31T19:30:49 <esotericnonsense> ???
347 2017-08-31T19:30:51 <esotericnonsense> :D
348 2017-08-31T19:31:09 <esotericnonsense> i could never get on with bc. i tried. always just use python interpreter whenever i need to do quick math stuff.
349 2017-08-31T19:31:27 <arubi> https://github.com/fivepiece/btc-bash-ng and bash to tie stuff together :)
350 2017-08-31T19:31:31 * esotericnonsense doesn't even remember how he fell into python to begin with
351 2017-08-31T19:31:54 <esotericnonsense> awesome
352 2017-08-31T19:32:30 <arubi> cheers, if you need some exotic math stuff, I might have it. if I don't, let me know, I love to implement cool stuff
353 2017-08-31T19:33:04 <arubi> it's not always 100% correct, but I try :P
354 2017-08-31T19:33:14 <esotericnonsense> i'm mostly doing this to aid my understanding of how wallets work and what a 'good' wallet storage format should look like
355 2017-08-31T19:33:33 <arubi> I guess I do too
356 2017-08-31T19:33:34 <esotericnonsense> after having a fun time trying to extract funds from a bitcoinj wallet, compiling tons of java shit just to get the keys out
357 2017-08-31T19:33:42 <arubi> wait I have something you'd like
358 2017-08-31T19:34:14 <arubi> https://gist.github.com/fivepiece/74b6f8bfa8816ee7e283d25a36947629 , core's wallet with keypool=0
359 2017-08-31T19:35:09 <arubi> I kinda want to dissect the wallet further, my real wish is it being able to use a 64 bytes value as the bip32 seed
360 2017-08-31T19:35:23 <arubi> as the input to the bip32 master xpriv rather
361 2017-08-31T19:36:00 <arubi> currently it's using one valid secp256k1 private key as the 32 bytes to the [hmac-sha512 "value" "Bitcoin seed"] thing
362 2017-08-31T19:36:48 <arubi> if it could be a 64 bytes value, then it could also be an output off a bip39 kdf, and I'd be able to get my core's private key on a hardware wallet! :D
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366 2017-08-31T19:40:37 <arubi> brb, sorry, I try to drop this info onto anyone who has an interest in improving the wallet scheme. I think the current "hey just change the constant" method is difficult. already folks are asking wallet providers to be able to sign with a "segwit address"
367 2017-08-31T19:41:33 <arubi> what I mean is, this needs fixing. it's getting to the point it's very hard to maintain..
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382 2017-08-31T21:25:41 <esotericnonsense> lessons in cryptography being full of footguns #229384583
383 2017-08-31T21:26:15 <esotericnonsense> https://github.com/petertodd/python-bitcoinlib/blob/master/bitcoin/core/key.py WARNING: This module does not mlock() secrets; your private keys may end up on disk in swap! Use with caution!
384 2017-08-31T21:26:15 <esotericnonsense> such an obvious possibility that I'd never even considered before
385 2017-08-31T21:29:20 <esotericnonsense> i think at least core and electrum now offer the ability to encrypt on boot (otherwise you end up with an unencrypted copy hitting the disk on first startup)
386 2017-08-31T21:29:42 <esotericnonsense> but that one seems to make securing electrum impossible unless there some magic c extension stuff
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391 2017-08-31T21:44:50 * esotericnonsense wonders if any implementations aside from core actually use mlock
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