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Bitcoin Forum > Bitcoin > Development & Technical Discussion > Why blocks txn_count is always zero in response to getheaders
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Author Topic: Why blocks txn_count is always zero in response to getheaders  (Read 627 times)
Sergio_Demian_Lerner (OP)
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February 19, 2013, 03:25:42 AM
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The wiki https://en.bitcoin.it/wiki/Protocol_specification#Block_Headers says that in response to getheaders, nodes send block headers with the field  txn_count set to zero. The code seems to agree.

Wouldn't be a lot more helpful if the returned headers contained the correct txn_count field so receivers could validate the block PoW before requesting the full block?

Thanks, Sergio.
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February 19, 2013, 03:50:21 AM
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Quote from: Sergio_Demian_Lerner on February 19, 2013, 03:25:42 AM
Wouldn't be a lot more helpful if the returned headers contained the correct txn_count field so receivers could validate the block PoW before requesting the full block?
This doesn't have anything to do with the POW.
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February 19, 2013, 04:29:24 AM
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Ohh I see, txn_count is not included in the PoW hash computation...
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