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01:18 < wumpus> there was a pull that added arm binaries to gitian descriptors, I am not sure what happend to it
01:19 < wumpus> ah, was closed because of a different solution, but never followed up https://github.com/bitcoin/bitcoin/pull/7659
01:20 < wumpus> probably we want armhf and aarch64 :-) no need for GUI binaries but bitcoind and the utilities would be nice
01:21 < wumpus> (this hopefully reduces the additional download size)
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01:32  * wumpus thinks SipHash should be renamed SipaHash
01:45 < NicolasDorier> wumpus: Sipash
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01:53 < wumpus> heh
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08:46 < instagibbs> sipa, looking at the chart I think his sample timeframe for 0.12.1 is too short to even tell
08:46 < instagibbs> which is whatever, the improvements in 0.12 are clear
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09:42 < achow101> any planned date for the repository move?
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10:39 < Chris_Stewart_5> What relation does SIGHASH_ANYONECANPAY have with sequence numbers? 
11:01 < Chris_Stewart_5> or signature hashes in general and sequence numbers, asking because of this test case
11:01 < Chris_Stewart_5> https://github.com/bitcoin/bitcoin/blob/master/src/test/data/tx_valid.json#L91
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17:56 < guest3423423> why do we need undo information again?
17:56 < belcher> for reorgs
17:56 < belcher> i believe
17:56 < sipa> correct
17:56 < guest3423423> but there's already raw block data
17:56 < sipa> raw block data does not tell you which outputs were spent by the block
17:56 < sipa> only which ones were added
17:57 < sipa> a block is a 'forward patch' to the UTXO set
17:57 < sipa> the undo data is a reverse patch
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17:58 < guest3423423> but block's transations tell you that, no?
17:58 < sipa> no
17:59 < guest3423423> prevout?
17:59 < sipa> you have a transaction A which creates a output A1
17:59 < sipa> that tells you the hash and index which is being spent
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17:59 < sipa> not the contents of the UTXO
17:59 < sipa> (the scriptPubKey and amount)
17:59 < sipa> you need to be able to restore the scriptPubKey and amount to the UTXO database
17:59 < guest3423423> of, so to avaoid indexing all the txs, we keep  undo data only?
18:00 < sipa> we don't index any txn at all
18:00 < sipa> there is just a separate database with only the unspent transaction outputs
18:00 < sipa> not full transactions, not an index
18:00 < guest3423423> txindex flag, could tell you where to look it up and figure out the amounts etc
18:00 < sipa> just copies of the outputs
18:00 < sipa> that was used until bitcoin 0.7, and it became horrendously slow
18:00 < guest3423423> so it is an optimization after all?
18:00 < sipa> as you'd need to go seek all over you disk to gather all the inputs
18:01 < guest3423423> yes
18:01 < sipa> yes
18:01 < sipa> it's how the database layout is designed
18:01 < guest3423423> great. makes sense. i thought i was going crazy over this
18:01 < sipa> alternatives are certainly possible
18:01 < sipa> but they're very different
18:02 < guest3423423> that answers my question. stackoverflow could use a patch :-)
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18:02 < guest3423423> to make this clearer
18:02 < sipa> link?
18:03 < guest3423423> one moment
18:05 < guest3423423> http://bitcoin.stackexchange.com/questions/32716/what-exactly-are-the-rev00000-dat-files
18:12 < guest3423423> by the way folks, when should slack be used vs freenode?
18:12 < sipa> slack is for development
18:12 < sipa> eh, freenode is
18:12 < sipa> slack is for the rest
18:13 < guest3423423> the rest?
18:14 < moli> slack is for drama
18:15 < guest3423423> that explains it :-)
18:15 < guest3423423> sipa: who do I send my job application to?
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