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From: Andrew Poelstra <apoelstra@wpsoftware.net>
To: Peter Todd <pete@petertodd.org>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Testing censorship resistance of bitcoin p2p network
Date: Sat, 18 Feb 2023 01:28:38 +0000	[thread overview]
Message-ID: <Y/Apxhqij1v56dT8@camus> (raw)
In-Reply-To: <B837E586-894E-40E8-9814-385EF59402B6@petertodd.org>

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On Sat, Feb 18, 2023 at 02:03:15AM +0200, Peter Todd wrote:
> On February 18, 2023 1:35:34 AM GMT+02:00, Andrew Poelstra via bitcoin-dev 
> >You could try statically analyze `<anything>` to determine whether the
> >IF branch could ever be taken. For example there is no path through
> >the "inscription script" that would result in all the crap being dropped
> >by the end of the script, violating the CLEANSTACK rule.
> >
> >This sort of filtering, assuming it could be reliably and efficiently
> >done, would at least force inscription scripts to be "plausible", and
> >would greatly increase their space cost by e.g. requiring OP_DROP to be
> >added somewhere hundreds of times.
> 
> "greatly increase their space cost"?
> 
> Tell me, what is the actual % increase to adding OP_DROPs like you propose?
>

By standardness rules (where you can have up to 80-byte pushes), a
little over 1%. By consensus (520-byte pushes) less than 0.2%.

Perhaps "greatly increase" is a stretch :) but if the fee market is
functioning and we're talking about large amounts of data, it's not
trivial either.

-- 
Andrew Poelstra
Director of Research, Blockstream
Email: apoelstra at wpsoftware.net
Web:   https://www.wpsoftware.net/andrew

The sun is always shining in space
    -Justin Lewis-Webster


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  reply	other threads:[~2023-02-18  1:28 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-13 12:34 [bitcoin-dev] Testing censorship resistance of bitcoin p2p network alicexbt
2023-02-17 14:56 ` vjudeu
2023-02-17 23:35   ` Andrew Poelstra
2023-02-17 23:39     ` Andrew Poelstra
2023-02-18  9:48       ` vjudeu
2023-02-18 18:03         ` Russell O'Connor
2023-02-18  0:03     ` Peter Todd
2023-02-18  1:28       ` Andrew Poelstra [this message]
2023-02-22 16:39         ` Peter Todd
2023-02-19  0:33   ` alicexbt

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