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 24 2017-12-23T01:22:33  <eck> it's probably easiest to just run a full node in that case
 25 2017-12-23T01:23:28  <eck> you can enumerate the transactions in each block from the json rpc api
 26 2017-12-23T01:23:54  <eck> and using that you can the transaction fees for all the transactions in a block
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 38 2017-12-23T02:41:01  <tomatopeel> 2 confirmations in 45 min on testnet, bleh >.>
 39 2017-12-23T02:41:17  <echeveria> tomatopeel: I'll move some more hashrate to it.
 40 2017-12-23T02:43:08  <mlz> can't wait to see the testnet bugbunny come back and gives us a block every minute :D
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 46 2017-12-23T03:03:36  <tomatopeel> mainnet is 1.44e+19 h/s, testnet is 3.36e+12 h/s unless my scientific notation conversions are off... so mainnet has about a factor of half a million more hash power, makes sense I guess? no idea really
 47 2017-12-23T03:04:16  <tomatopeel> makes me wonder about mining on testnet though (sorry I'm pretty new) - I guess some people are kind enough to devote decent amounts of hash power to testnet? surely nobody is running asic's on it?
 48 2017-12-23T03:04:50  <tomatopeel> maybe older obsolete asic's I guess
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 59 2017-12-23T04:29:36  <echeveria> tomatopeel: mining on test net is abusable as well.
 60 2017-12-23T04:30:10  <echeveria> you can reset the difficulty to zero using a bug.
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 62 2017-12-23T04:33:38  <luke-jr> echeveria: not a bug; it's intentional..
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 70 2017-12-23T04:56:28  <mlz> luke-jr, why is it intentional? for what reason?
 71 2017-12-23T04:56:49  <mlz> i don't mind fast blocks though :D
 72 2017-12-23T04:57:18  <mlz> what we also need is a reset testnet, too many blocks to download now
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 74 2017-12-23T05:03:33  <cncr04s> nooooo
 75 2017-12-23T05:03:39  <cncr04s> my testnet fortune
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 81 2017-12-23T05:13:20  <luke-jr> mlz: so difficulty won't get high
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103 2017-12-23T06:37:52  <dograt> Hi. Could anyone point me towards known schemes to reduce blockchain storage requirements of full nodes by including checkpointing info in blocks? For example, if miners were to maintain merkle patricia tries that maps the current balances of all utxos and update it after every block received (using a persistent/functional trie to support temp forks) and the root hash
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105 2017-12-23T06:43:12  <arubi> dograt, this was recently posted : https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014337.html
106 2017-12-23T06:43:28  * dograt reading
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108 2017-12-23T06:47:08  <phantomcircuit> dograt, that's for a sort of intermediate security setup, full nodes would still need to build the utxo from the full blockchain
109 2017-12-23T06:49:05  <dograt> phantomcircuit: really? If a new node grabs some utxo set and sees it has a hundred or more confirmations, couldn't it be quite sure?
110 2017-12-23T06:49:55  <dograt> (I'm still talking about my naive solution of putting the root hash in the block, I had lacked the terminology/background to describe the problem before, now I'm getting it from reading the resources pointed out by arubi :))
111 2017-12-23T06:50:37  <phantomcircuit> dograt, no
112 2017-12-23T06:50:45  <phantomcircuit> it completely changes the security model to do that
113 2017-12-23T06:51:10  <phantomcircuit> currently the worst you can do by hashpower attack is to reverse transactions in those blocks
114 2017-12-23T06:51:24  <phantomcircuit> with utxo commitments you could completely fabricate history
115 2017-12-23T06:51:35  <phantomcircuit> the reward is vastly larger for attackers
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117 2017-12-23T06:55:12  <dograt> phantomcircuit: hm. I'm afraid I don't understand
118 2017-12-23T06:56:00  <dograt> Actually I'm reading one of the linked mailing lists emails that is talking about "txo commitment"; I had not heard of this term before
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121 2017-12-23T07:04:06  <dograt> arubi: heh, following that email chain: https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014339.html someone proposes my exact idea
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124 2017-12-23T07:10:15  <dograt> phantomcircuit: ok I think I understand now
125 2017-12-23T07:10:30  <dograt> Do you mean if an attacker starts with a faulty commitment and builds a chain off of that?
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127 2017-12-23T07:10:40  <dograt> Because it takes fewer blocks than the canonical chain
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131 2017-12-23T07:30:03  <arubi> dograt, right, I think I've heard some form of utxo state commitments in blocks but really I don't think there's a way to do it while keeping the same security that we have from full validation
132 2017-12-23T07:30:34  <phantomcircuit> dograt, yes, it means to rewrite all of history takes only maybe a few hundred or thousand blocks instead of 500k blocks
133 2017-12-23T07:30:43  <phantomcircuit> dograt, which is a significantly different thing
134 2017-12-23T07:30:57  <phantomcircuit> i suggested exactly this in the past
135 2017-12-23T07:30:59  <phantomcircuit> i was wrong
136 2017-12-23T07:32:09  <dograt> Yeah.. but. I'm not optimistic in bitcoin being able to remain decentralized if the storage required to run it continnues to increase without limit
137 2017-12-23T07:32:39  <dograt> However it's good to know people are on the case
138 2017-12-23T07:33:06  <arubi> you don't have to keep storing the whole chain
139 2017-12-23T07:33:39  <dograt> Right, but you need to acquire it
140 2017-12-23T07:33:51  <arubi> yes
141 2017-12-23T07:33:57  <dograt> So I suppose the requirement would be bandwidth/max storage
142 2017-12-23T07:34:48  <arubi> it's still a lot more difficult to validate the data than to fetch it, I think
143 2017-12-23T07:35:07  <dograt> Ah.
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145 2017-12-23T07:41:11  <phantomcircuit> arubi, it is
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150 2017-12-23T08:12:48  <dograt> And once you look it's everywhere :)
151 2017-12-23T08:12:53  <dograt> From last month: https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-November/015296.html
152 2017-12-23T08:13:07  <dograt> "The idea behind PLP is to serialize the UTXO set in a standardized way, and
153 2017-12-23T08:13:07  <dograt> publish a hash of it in the block header so that the blockchain commits to
154 2017-12-23T08:13:07  <dograt> it"
155 2017-12-23T08:13:14  <dograt> (oops sorry for the flood)
156 2017-12-23T08:15:50  <echeveria> dograt: the gettxoutsetinfo RPC call reads out the UTXO and hashes it.
157 2017-12-23T08:18:46  <echeveria> # time bitcoin-cli gettxoutsetinfo
158 2017-12-23T08:18:49  <echeveria> real    3m4.464s
159 2017-12-23T08:20:03  <echeveria> validating a block on this machine is usually under 100ms, so we've clearly got to do something different.
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178 2017-12-23T11:12:30  <largep> is there a limit to listreceivedbyaddress lets say you have millions of addresses
179 2017-12-23T11:12:44  <echeveria> no, but things get very, very slow.
180 2017-12-23T11:14:28  <largep> how slow?  will it block other commands?
181 2017-12-23T11:17:37  <echeveria> my bitcoind takes something like 10 minutes to load the wallet.
182 2017-12-23T11:18:18  <echeveria> few seconds for things like getwalletinfo. think sending a transaction takes a while.
183 2017-12-23T11:18:29  <echeveria> this is with ~1M transactions.
184 2017-12-23T11:19:01  <echeveria> 9 seconds to sign a transaction.
185 2017-12-23T11:28:47  <jouke> echeveria: how many keys?
186 2017-12-23T11:29:59  <echeveria> I don't think that's visible from RPC
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188 2017-12-23T11:30:36  <jouke> No, debug log wil often show you how many keys it has reserved after you create a new one
189 2017-12-23T11:31:44  <echeveria> that shows the keypool info only doesn't it?
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193 2017-12-23T12:00:47  <jouke> Maybe it depends on the debug options, but afaik it shows both the total number of keys and the number of keys in keypool
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250 2017-12-23T18:17:56  <tomatopeel> using raw transactions, the best practice which will mimic the default behaviour of bitcoin-qt is to send change to "$(bitcoin-cli getrawchangeaddress)" ?
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252 2017-12-23T18:21:09  <tomatopeel> also, I'm currently fooling around with bitcoin-cli/bitcoind between two datadirs. If I want a third node, to avoid re-downloading everything again, can I just rsync one of my already-downloaded datadir's and just delete the wallet.dat?
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265 2017-12-23T19:07:09  <Randolf> tomatopeel:  Backup all of your Private Keys before you delete your wallet.dat file.
266 2017-12-23T19:07:18  <Randolf> In fact, backup your wallet.dat file before deleting it too.
267 2017-12-23T19:07:43  <Randolf> Whoops, sorry, I thought this was the #bitcoin channel.  :)
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277 2017-12-23T19:43:50  <tomatopeel> Randolf: this is all on testnet but thanks haha and it's okay I'm still 88% noobish in any channel ;)
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292 2017-12-23T21:33:12  <Eliel> Suppose I have a service that's running and is using bitcoind wallet with the RPC interface as the wallet. We'd like to upgrade to using Segwit transactions. What are reasonable options for doing that if we'd like to make the upgrade on the timescale of a few weeks?
293 2017-12-23T21:33:48  <Eliel> I should add that reliability requirements are pretty high. Can't really compromise on that.
294 2017-12-23T21:39:50  <eck> you make an rpc call to addwitnessaddress and provide it with an address returned by getnewaddress
295 2017-12-23T21:39:57  <eck> it gives you make a segwit address
296 2017-12-23T21:41:16  <eck> that's pretty much it, you can test using testnet/regtest as usual
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298 2017-12-23T21:46:50  <Eliel> the most important thing would be to get change addresses to be segwit
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300 2017-12-23T21:50:13  <eck> then your options are: (1) use 0.15 and create the transactions manually using bitcoin-tx, (2) run a 0.16 pre-release, or (3) wait until there's a stable bitcoind release that does SW change addresses
301 2017-12-23T21:50:49  <RainMan28> hey eck did you mean to send that to me?
302 2017-12-23T21:52:39  <eck> no
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322 2017-12-23T22:59:07  <DSidH> arubi: my first segwit tx :) https://www.blocktrail.com/tBTC/tx/b49f3d6d15f2bdd9217ba3caaf1bb1f2d9875c9657e6b0ac7a0ef841d486ad1d
323 2017-12-23T23:01:12  <DSidH> From segwit developers guide: ".... the wallet must be able to recognize payment to such (P2WPKH) addresses...." ..What exactly does this imply? (to recognize payments)
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