From: Sergio Demian Lerner <sergio.d.lerner@gmail•com>
To: bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>
Cc: hello@p2sh•info
Subject: [bitcoin-dev] Some real-world results about the current Segwit Discount
Date: Mon, 8 May 2017 19:42:23 -0300 [thread overview]
Message-ID: <CAKzdR-qojNn8OtUTPbxa0JauK9nmo2ZGm4ihKuyzsz_FAgokDw@mail.gmail.com> (raw)
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I have processed 1000 blocks starting from Block #461653.
I computed several metrics, including the supposed size of witness data and
non-witness data (onchain), assuming all P2SH inputs/outputs are converted
to P2PWSH and all P2PKH inputs/outputs are converted to P2WPKH.
This takes into account that other types of transactions will not be
modified by Segwit (e.g. OP_RETURN outputs, or P2PK). This analysis doesn't
take into account that LN transactions may affect the current state,
increasing the segwit/nosegwit ratio.
Among a lot of information, I've got the following real world results...
acMainChainSpace =352608924
acSegwitSpace =599400403
Ratio segwit/nosegwit=1.6999
This implies that the 75% that discount is not the best option to prevent
witness spam in a block of 4 MB, as stated in
https://segwit.org/why-a-discount-factor-of-4-why-not-2-or-8-bbcebe91721e.
The non-witness data weight factor should not be 4 but 2.35. The closest
integer value is 2, which leads to a 50% witness discount.
The Bitcoinj source code is available for anyone to review. I encourage
anyone to re-compute this with another utility to cross-check. Maybe
Antoine Le Calvez (p2sh.info) would like to double-check.
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next reply other threads:[~2017-05-08 22:43 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-08 22:42 Sergio Demian Lerner [this message]
2017-05-08 23:47 ` Alphonse Pace
2017-05-09 13:49 ` Sergio Demian Lerner
2017-05-09 14:33 ` James Hilliard
2017-05-09 15:45 ` Johnson Lau
2017-05-09 16:19 ` Sergio Demian Lerner
2017-05-09 16:27 ` Johnson Lau
2017-05-09 16:27 ` James Hilliard
2017-05-09 18:15 ` Matt Corallo
2017-05-09 18:58 ` Sergio Demian Lerner
2017-05-09 19:15 ` Sergio Demian Lerner
2017-05-09 19:30 ` Gregory Maxwell
2017-05-09 19:42 ` Matt Corallo
2017-05-09 20:13 ` Gregory Maxwell
2017-05-09 20:58 ` Sergio Demian Lerner
2017-05-10 5:37 ` Jorge Timón
2017-05-10 14:05 ` Matt Corallo
2017-05-10 15:25 ` Sergio Demian Lerner
2017-05-10 16:39 ` Matt Corallo
2017-05-10 19:40 ` Sergio Demian Lerner
2017-05-08 23:56 ` Gregory Maxwell
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