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55 2017-12-16T04:02:00 <LowKey> Hi, I did some tx test and getting Output data mismatch for txcreate1.hex, how todo proper for create txcreate1.hex ?
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115 2017-12-16T11:18:09 <DSidH> can I use the same code to parse non-segwit and segwit coinbase transaction? (assuming I am not interested in the outputs)
116 2017-12-16T11:18:46 <DSidH> Its not very clear from the specs how a segwit coinbase tx differs from non-segwit ones
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119 2017-12-16T11:31:52 <arubi> no you can't because again the transaction will have a witness
120 2017-12-16T11:32:02 <arubi> what are you actually trying to do?
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122 2017-12-16T11:52:26 <DSidH> arubi: I need to parse a raw block
123 2017-12-16T11:53:25 <DSidH> so I am getting tx one by one. When I reach a normal coinbase tx, I know how to parse it and ignore it (whether segwit or non-segwit)
124 2017-12-16T11:54:05 <DSidH> correct that to: "When I reach a coinbase tx, I want to skip that many bytes and ignore it (whether segwit or non-segwit)"
125 2017-12-16T11:56:56 <DSidH> will the witness be part of some older unused data or does it have new fields that older parser will not understand?
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127 2017-12-16T11:58:33 <DSidH> actually, another way to state the question is, if I write code to parse non-coinbase segwit tx, will that same code work for coinbase segwit tx?
128 2017-12-16T11:59:19 <DSidH> (I am ignoring the actual inputs, not parsing the scripts, just need to get to end markers of each transaction for now)
129 2017-12-16T12:01:02 <arubi> it will not work because of different encoding
130 2017-12-16T12:01:24 <arubi> unless you have some magical way of skipping stuff without parsing its size
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133 2017-12-16T12:19:10 <DSidH> arubi: Lol no. finding the size is what I'm stuck at
134 2017-12-16T12:20:00 <DSidH> I was reading this: https://bitcoin.stackexchange.com/a/20725/2075 --> "A coinbase transaction follows the same format as a normal transaction"
135 2017-12-16T12:20:11 <DSidH> so I assumed the same would hold for segwit case
136 2017-12-16T12:20:50 <DSidH> Is this true? ---> "A coinbase SEGWIT transaction follows the same format as a normal SEGWIT transaction"
137 2017-12-16T12:21:11 <arubi> it is, the same as a segwit transaction
138 2017-12-16T12:21:11 <arubi> it has a marker, version, witness.. just like a normal segwit transaction
139 2017-12-16T12:21:11 <arubi> yep
140 2017-12-16T12:21:32 <DSidH> great! thanks
141 2017-12-16T12:21:37 <arubi> yw
142 2017-12-16T12:25:48 <DSidH> out of curosity, why does coinbase have to be segwit? It is not spending any segwit outputs? Is it to encode other data for remaining segwit tx in the block?
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145 2017-12-16T12:30:44 <DSidH> nvm: I think I got my answer .. I think if the block has any (ordinary) segwit tx then it must have a segwit coinbase tx.. Hope I got this right
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150 2017-12-16T13:07:46 <Sentineo> all blocks must have sw coinbase ... afaik, that is the new rule byt the softfork
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152 2017-12-16T13:09:23 <Sentineo> is there a way to know core is doing block validation at some mkment?
153 2017-12-16T13:09:27 <Sentineo> moment?
154 2017-12-16T13:09:39 <Sentineo> e.g. an rpc or something?
155 2017-12-16T13:09:55 <Sentineo> other than checking cpu utilisation
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157 2017-12-16T13:18:06 <DSidH> Sentineo: only if the block has other segwit tx. If the block has only non-segwit tx then the coinbase CAN be non-segwit too
158 2017-12-16T13:18:22 <DSidH> "Segwit-incapable miners can however contribute blocks that only include non-segwit transactions that build on top of the chain that includes segwit-blocks." from https://bitcoin.stackexchange.com/a/60369/2075
159 2017-12-16T13:19:06 <Sentineo> DSidH: good to know, ty. Thought it is a strict rule. But yeah what would be the use of it without segwit tx.
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180 2017-12-16T14:49:36 <DSidH> I am looking at references on how to decode the witness stack items
181 2017-12-16T14:49:47 <DSidH> looking for*
182 2017-12-16T14:50:48 <DSidH> any recommendations?
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184 2017-12-16T14:54:45 <Sentineo> Imthinkmthe bip had it nicely documented
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192 2017-12-16T15:41:16 <waxwing> DSidH, BIP141, 143, 144 iirc
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194 2017-12-16T15:42:15 <waxwing> 144 tells you what the transaction serialization on-the-wire looks like
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223 2017-12-16T18:01:39 <jb55> thinking about writing a cli calc that understands btc denominations... something like bcalc '50 mBTC + 200 sat'
224 2017-12-16T18:01:43 <jb55> if that doesn't exist...
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