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From: "James O'Beirne" <james.obeirne@gmail.com>
Date: Wed, 11 Jun 2025 23:34:15 -0400
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Message-ID: <CAPfvXfKBajzf0Fp_OdrqftiOJRcyROnT8Dnb4skEiP8=yr=U+g@mail.gmail.com>
Subject: Re: [bitcoindev] CTV + CSFS: a letter
To: Antoine Riard <antoine.riard@gmail.com>
Cc: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
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Hey Antoine,
Thanks for the post. Based on my read of what you're describing
nothing in particular in your attack is specific to CTV. In your example
script, you're not making use of the template hash or OP_NOP4.
As far as I can tell, the DoS you're describing basically affects all non
witness v1 activity on bitcoin - i.e. some malicious user filling blocks
up to their sigops limit to deny other users service.
Given that probably most activity on bitcoin is not witness v1,
I don't see how this is a CTV-specific issue.
Thanks,
James
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<div dir=3D"ltr"><div dir=3D"ltr"><div>Hey Antoine,</div><div><br></div><di=
v>Thanks for the post. Based on my read of what you're describing</div>=
<div>nothing in particular in your attack is specific to CTV. In your examp=
le</div><div>script, you're not making use of the template hash or OP_N=
OP4.</div><div><br></div><div>As far as I can tell, the DoS you're desc=
ribing basically affects all non</div><div>witness v1 activity on bitcoin -=
i.e. some malicious user filling blocks</div><div>up to their sigops limit=
to deny other users service.</div><div><br></div><div>Given that probably =
most=C2=A0activity on bitcoin is not witness v1,</div><div>I don't see =
how this is a CTV-specific issue.</div><div><br></div><div>Thanks,</div><di=
v>James</div></div><br></div>
<p></p>
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