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42 2018-03-26T02:36:48 <full-noder___> noob here. Apologies in advance.
43 2018-03-26T02:37:11 <full-noder___> Any way of going about learning how to develop apps besides running a full node?
44 2018-03-26T02:37:12 <Randolf> full-noder___: I reject your apology. There's no need to apologize for being new at something.
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47 2018-03-26T02:40:12 <full-noder___> Going through the mastering bitcoin book. Chapter 3 indicates, for people interested in developing bitcoin software, you should be running your own node.
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49 2018-03-26T02:40:42 <Randolf> That's a good book.
50 2018-03-26T02:41:28 <Randolf> You can also learn by getting involved in the development community, even if only watching: https://www.github.com/bitcoin/
51 2018-03-26T02:43:21 <full-noder___> Thought there might a work around for the "should be running your own node" part.
52 2018-03-26T02:43:42 <full-noder___> Thanks Randolf!
53 2018-03-26T02:43:44 <Randolf> Well, you could query Electrum or something like that.
54 2018-03-26T02:44:00 <Randolf> You could also use TestNet instead.
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56 2018-03-26T02:45:27 <full-noder___> Ah okay. I'll look into that. Thanks a ton!
57 2018-03-26T02:45:44 <Randolf> You're welcome.
58 2018-03-26T02:46:01 <Randolf> You can also ask about getting into TestNet on the #bitcoin channel.
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77 2018-03-26T03:41:27 <kallewoof> full-noder___: Regtest is great for trying things out. It's your own local blockchain.
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110 2018-03-26T07:38:08 <FraJah> moinings
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136 2018-03-26T11:06:13 <codablock> Hello. I'm currently trying to figure out where in the Bitcoin code wallet transactions are being periodically re-broadcasted. I found multiple mentions in Github issues/pull-requests that state that this is being done, for example in https://github.com/bitcoin/bitcoin/pull/9290. I'm however unable to figure where/when this is happening. The only thing I found is the re-broadcasting on startup.
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139 2018-03-26T11:10:48 <codablock> I'm looking for this because I stumbled upon the problem of too-long-chain transactions being added to the wallet without being added to the mempool (issue #10004). I understand that this can be avoided with "-walletrejectlongchains=1", but this is not meant for non-test code...so it doesn't feel correct to use (and recommend) this.
140 2018-03-26T11:11:25 <codablock> And as I read multiple times in different places that wallet transactions are being re-broadcasted, I'd expect the problem to be "not that bad" as the re-broadcasting should try to re-add the TXs to the mempool...but that seems to never happen.
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211 2018-03-26T17:14:33 <ProfMac> Is there a procedure to take the hex value returned by getrawtransaction and turn it into a CBlockTemplate?
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213 2018-03-26T17:16:04 <quitobro> hello people, does anyone know if itâs possible to run 2 bitcoin nodes - one mainnet, one on testnet? was thinking if i run one in a virtual machine, and one on my main laptop OS, that i could pull it offâ¦
214 2018-03-26T17:16:29 <quitobro> i want to develop/test a bitcoin implementation + Lightning implementation locally, but have mainnet activities so need to run a mainnet node
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217 2018-03-26T17:21:21 <ProfMac> I run two nodes in the same VM. Just use the -datadir= command line parameter, and set the ports to different values in the bitcoin.conf files in each directory. In my case, I also control a few more things so that my 2 nodes are quarantined.
218 2018-03-26T17:26:05 <quitobro> ProfMac: cheers :)
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228 2018-03-26T18:09:25 <quitobro> ProfMac: so you just start the two processes by pointing them to different `data_dir` locations?
229 2018-03-26T18:09:31 <quitobro> and maintain separate bitcoin.conf files for each?
230 2018-03-26T18:11:46 <arubi> you don't need different datadirs since the testnet files will be in a ./testnet subdir of the datadir. it helps to maintain two bitcoin.conf files though because you'd probably want more adventurous settings for testnet
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242 2018-03-26T18:46:24 <fullstep> Is it safe to assume that private keys encoded as WIF strings will always be either 51 or 52 characters long, depending on whether it is compressed or not?
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245 2018-03-26T18:58:10 <arubi> if the version byte is not zero then it'll have constant length
246 2018-03-26T18:59:44 <arubi> I think.. now I'm doubting myself
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249 2018-03-26T19:16:53 <fullstep> As far as I know a private key in WIF format doesn't have a version byte. Only a network byte (test or prod) and a compression flag( zero or 1).
250 2018-03-26T19:18:14 <fullstep> It seems to be the presence of the compresion flag, which is optional, that changes the length of the WIF string.
251 2018-03-26T19:18:18 <arubi> that's what I mean by version byte - it being testnet or mainnet. both aren't 0x00, but if it were then you could get different length
252 2018-03-26T19:20:10 <arubi> I'm almost positive that the byte not being 0x00 makes the base58 encoding be constant length. I'm trying to find a counter example but can't
253 2018-03-26T19:23:07 <ProfMac> quitobro, "bitcoin -datadir=$HOME/.bitcoin-A" and "bitcoin -datadir=$HOME/.bitcoin-1"
254 2018-03-26T19:27:51 <ProfMac> The two directories have different copies of bitcoin.conf, they may have, e.g. port=7333, rpcport=7332 in A, and port=8333, rpcport=8332 in 1. You will need to have something like -connect=localhost:8333 on one command line.
255 2018-03-26T19:31:41 <arubi> I find it's better to just rpcbind them to different localhost addresses. ie mainnet on 127.0.0.1 and testnet on 127.1.0.1 . this way you can run multiple nodes of the same network easily (I run 4 regtest nodes for example)
256 2018-03-26T19:31:59 <arubi> but to each their own :)
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258 2018-03-26T19:33:46 <arubi> it's less of an issue when they're different networks since by design for testnet it'll be 18333 and 18332, but if you run multiple on the same net then it matters
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261 2018-03-26T19:35:20 <ProfMac> I'm running IPv6 when possible, and I thought I had trouble using the same ports with different addresses running in the same VM.
262 2018-03-26T19:35:27 <quitobro> arubi: so when you run testnet nodes, do you specify both `âtesnet` as well as `âconf=/path/to/testnet/config.cfg`?
263 2018-03-26T19:35:40 <arubi> I just specify testnet=1 in the .conf itself
264 2018-03-26T19:35:52 <quitobro> and point tesetnet processes to the testnet conf file?
265 2018-03-26T19:35:56 <ProfMac> And again, I'm answering a slightly different question, of running two otherwise identical nodes, not testnet & regularnet.
266 2018-03-26T19:36:12 <quitobro> ProfMac: roger that
267 2018-03-26T19:36:20 <arubi> yes, I have testnet-cli, mainnet-cli, regtest-cli.. all point to .sh scripts that have the -conf in them
268 2018-03-26T19:36:45 <quitobro> arubi: and a `testnetd` to start the daemon or something?
269 2018-03-26T19:36:52 <arubi> exactly
270 2018-03-26T19:37:00 <arubi> testnetd also has the -conf
271 2018-03-26T19:37:15 <arubi> testnet-tx has a -testnet in it since it doesn't have a -conf flag
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274 2018-03-26T19:39:08 <arubi> and a final "$@" in each of the .sh's so I can pass arguments on the command line
275 2018-03-26T19:41:00 <ProfMac> I also ended up putting ~/.bitcoin/<portnumber> as a family of subdirectories.
276 2018-03-26T19:41:28 <arubi> I just dump them all in ~/.bitcoin/ , testnet.conf, mainnet.conf... etc :)
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279 2018-03-26T19:42:32 <ProfMac> I am usually running a couple of instances in a quarantine-net, so I keep the directories separate.
280 2018-03-26T19:43:40 <ProfMac> lol. "He's not mining with a full blockchain."
281 2018-03-26T19:43:58 <arubi> never needed the full chain anyway :P
282 2018-03-26T19:44:18 <arubi> but there are pools who don't validate. sad
283 2018-03-26T19:44:39 <ProfMac> I ran a bunch of statistics on the 1st 10,008 blocks.
284 2018-03-26T19:45:31 <arubi> anything interesting?
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287 2018-03-26T19:46:20 <arubi> well I guess it's all interesting, but anything out of the ordinary?
288 2018-03-26T19:47:30 <ProfMac> Yep. The difficulty was pegged at 1.0 even though the times were not dead on. I was plotting MedianPrevTime, and there is an Interval (what a block of 2016 is actually called in the code) where the hashrate differed. There are 5 or 6 places where hashing stopped for 6 hours to a day or so.
289 2018-03-26T19:47:57 <ProfMac> And interesting to me, it fit almost exactly to a Poisson distribution.
290 2018-03-26T19:48:14 <arubi> I guess that means that nobody was gaming it then?
291 2018-03-26T19:48:33 <ProfMac> It had the "feel" of authentic lab data.
292 2018-03-26T19:49:07 <arubi> but wouldn't you expect a poisson distribution even now if there are no games?
293 2018-03-26T19:49:52 <ProfMac> No, a superposition of Poissons, for each hash rate. Beyond my pay grade to interpret.
294 2018-03-26T19:50:31 <arubi> hm
295 2018-03-26T19:50:59 <ProfMac> Actually, "truncated Poissons" since the slow miners don't get to express the long running blocks.
296 2018-03-26T19:51:38 <arubi> what do you mean?
297 2018-03-26T19:52:02 <arubi> diff hasn't changed in those 10k blocks, so if you had 0.001 of the hashrate, you got 0.001 of the blocks right?
298 2018-03-26T19:52:38 <arubi> (I'm assuming no new hashrate entered so your share didn't change in that time)
299 2018-03-26T19:52:52 <ProfMac> if there are 2 miners, running at hashrate 1MH/s and 10 MH/s, you only see the 1st block found, not both blocks found.
300 2018-03-26T19:53:20 <ProfMac> But it is a race that throws away the longer blocks from the sample.
301 2018-03-26T19:53:33 <arubi> but the 1mh/s miner will get 1/10 of blocks, it's not a race
302 2018-03-26T19:54:09 <arubi> a race means that the faster miner would win every time. hashing means you'll just get your share over a long enough timeline
303 2018-03-26T19:54:19 <ProfMac> https://plus.google.com/u/0/photos/115426745065196075335/album/6519521612516431713/6519521612265200578?authkey=CK2wi7Gd3uaRwwE
304 2018-03-26T19:56:48 <arubi> I'm confused by these graphs, but that's just me being stupid :)
305 2018-03-26T19:57:01 <ProfMac> You will get your share, but the distribution is not a nice poisson. That shows up very soon after the 10,008th block.
306 2018-03-26T19:57:58 <ProfMac> The top-right one is the most straightforward. It is the elapsed time from MedianPrevTime to the current block time.
307 2018-03-26T19:58:50 <arubi> did you check for changes in the software's behavior for including the blocktime in the header?
308 2018-03-26T19:59:03 <arubi> I mean, I guess it didn't change much in 10k blocks, but maybe it was behaving differently?
309 2018-03-26T19:59:56 <ProfMac> I did not. I assume I could look at the git log and surmise which version was running. But I followed a different path for my project.
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311 2018-03-26T20:00:28 <ProfMac> That blue section just before block 2,000 jumps out at me.
312 2018-03-26T20:00:54 <arubi> worth to look at the first 70 days of logs I guess
313 2018-03-26T20:01:24 <ProfMac> Oh, and the actual blocktime was closer to 720 seconds than 600.
314 2018-03-26T20:01:42 <arubi> yea that probably the reason diff stayed at 1
315 2018-03-26T20:01:53 <ProfMac> Well, I'm off to an errand.
316 2018-03-26T20:01:55 <arubi> o/
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318 2018-03-26T20:03:44 <ProfMac> ah, yeah.
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323 2018-03-26T20:12:05 <dbackeus> I'm learning the bitcoin procol by implementing it from scratch in Crystal. I have version acking handshake working but somehow when I send "getblocks" or "getheaders" the remote just stops sending any data, any ideas for what might cause it or how to troubleshoot?
324 2018-03-26T20:13:42 <arubi> dbackeus, you need to send a specific message first before any other communication with a peer
325 2018-03-26T20:13:52 <arubi> I'm sure there's a bip.. I forget what it was
326 2018-03-26T20:14:08 <arubi> dbackeus, oh, https://en.bitcoin.it/wiki/Protocol_documentation#version
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328 2018-03-26T20:14:50 <dbackeus> "I have version acking handshake working" - that is I send version and get verack back, then remote sends me version and I send verack back
329 2018-03-26T20:14:59 <dbackeus> so that's all good as far as I know
330 2018-03-26T20:15:04 <arubi> what's the version you're sending?
331 2018-03-26T20:15:20 <dbackeus> then I get a bunch of other messages from remote and he starts streaming inv messages, however he just stops when I send "getblocks" or "getheaders"
332 2018-03-26T20:15:37 <quitobro> is there a way to make the `bitcoind` command fail loudly if you pass it a conf=/path/to/file/that/does/not/exist/ ?
333 2018-03-26T20:15:38 <dbackeus> I also have "ping" vs "pong" implemented so that seems to work ok
334 2018-03-26T20:16:11 <quitobro> not super clear what behavior is happening currently; i just get a message about needing to restart w/ `-reindex`...
335 2018-03-26T20:16:30 <arubi> quitobro, `if [[ ! -r /path/to/bitcoin.conf ]]; then echo 'NOOOO!!'; fi` :P ?
336 2018-03-26T20:17:04 <arubi> dbackeus, so, which version are you sending to the peer?
337 2018-03-26T20:18:22 <dbackeus> arubi I'm sending 70015
338 2018-03-26T20:19:02 <arubi> oh, that looks fine. I don't know.
339 2018-03-26T20:19:53 <dbackeus> could the getheaders/getblocks message have content that leaves the peer unable to respond causing it to just ignore?
340 2018-03-26T20:20:41 <dbackeus> I don't see why that would stop it from keep up streaming inv messages though...
341 2018-03-26T20:21:02 <arubi> not sure.
342 2018-03-26T20:21:21 <arubi> afk
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370 2018-03-26T23:05:56 <sword_smith> I don't get why the network byte of P2SH addresses can be 0x05 and the P2SH addresses can start with '3' when the base58-encoding of 0x05 is '6'. What am I missing?
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