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Clarification on a block protocol rule
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Topic: Clarification on a block protocol rule (Read 972 times)
bitcoinandroid
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Clarification on a block protocol rule
December 10, 2011, 11:52:18 PM
#1
On the protocol rules here
https://en.bitcoin.it/wiki/Protocol_rules#.22block.22_messages
it states: "8. For the coinbase (first) transaction, scriptSig length must be 2-100"
But it looks like the coinbase transaction doesn't have any scriptSig param at all, for example:
http://blockexplorer.com/rawblock/000000000000073ab0ea030440998db75d5c74393c6a0875a37fc4f00f1539e8
What am I missing?
Thanks!
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theymos
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Re: Clarification on a block protocol rule
December 11, 2011, 12:46:54 AM
#2
The coinbase field is the scriptSig field.
1NXYoJ5xU91Jp83XfVMHwwTUyZFK64BoAD
bitcoinandroid
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Re: Clarification on a block protocol rule
December 11, 2011, 01:58:35 AM
#3
Thanks theymos! I thought that might be it.
As a follow up, on
https://en.bitcoin.it/wiki/Transactions#Generation
it says:
"The data in "coinbase" can be anything; it isn't used" So why the check for between 2 and 100 characters? Is this just to prevent too much data from being stuffed in there? Just trying to understand the reason behind it.
Also, this block looks like it has a really long coinbase field (130 characters). How was it allowed?
http://blockexplorer.com/rawblock/00000000000009e6e9b08e2ced87f48e08654d03bbd0027ef0f5d1da803522a3
Thanks I really appreciate the help!
theymos
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Re: Clarification on a block protocol rule
December 11, 2011, 02:01:15 AM
#4
Quote from: bitcoinandroid on December 11, 2011, 01:58:35 AM
Is this just to prevent too much data from being stuffed in there?
Yes.
Quote
Also, this block looks like it has a really long coinbase field (130 characters). How was it allowed?
The restriction is 100
bytes
. That's 65 bytes.
1NXYoJ5xU91Jp83XfVMHwwTUyZFK64BoAD
gmaxwell
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Re: Clarification on a block protocol rule
December 11, 2011, 02:15:27 AM
#5
Quote from: bitcoinandroid on December 11, 2011, 01:58:35 AM
Also, this block looks like it has a really long coinbase field (130 characters). How was it allowed?
http://blockexplorer.com/rawblock/00000000000009e6e9b08e2ced87f48e08654d03bbd0027ef0f5d1da803522a3
That block has merged mining, and it's also signaling support for OP_EVAL. It's an eligius block.
bitcoinandroid
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Re: Clarification on a block protocol rule
December 12, 2011, 01:18:13 AM
#6
Ok great, thanks for the feedback guys!
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