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In-Reply-To: <Y9vOGVMJx1b9CPYq@petertodd.org>
From: Greg Sanders <gsanders87@gmail.com>
Date: Thu, 2 Feb 2023 09:59:09 -0500
Message-ID: <CAB3F3Du2XsHCh5o5S84XKKizTkrTFJJ-j42-qunyuSRkwX7H_Q@mail.gmail.com>
To: Peter Todd <pete@petertodd.org>
Content-Type: multipart/alternative; boundary="0000000000004ac71805f3b8cfff"
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Ephemeral Anchors: Fixing V3 Package RBF
 againstpackage limit pinning
Precedence: list

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Hi Peter,

For the most principled of reasons:

Because I have to change test vectors everywhere!

Greg

On Thu, Feb 2, 2023 at 9:52 AM Peter Todd <pete@petertodd.org> wrote:

> On Fri, Jan 27, 2023 at 09:05:20AM -0500, Greg Sanders via bitcoin-dev
> wrote:
> > Hello again dev,
> >
> > Due to the interest in the proposal and the prodding of certain folks,
> I've
> > written up a short draft BIP of the Ephemeral Anchors idea here:
> >
> https://github.com/instagibbs/bips/blob/ephemeral_anchor/bip-ephemeralanchors.mediawiki
> >
> > The pull request at https://github.com/bitcoin/bitcoin/pull/26403 has
> been
> > refreshed on top of the latest V3 proposal, but the BIP itself is
> > unaffected.
>
> The BIP states that:
>
>     Why OP_2 not OP_TRUE? OP_TRUE is often used in test vectors, using
> OP_2 has
>     the same benefits and none of these common collisions.
>
> Why is a "collision" harmful in this case?
>
> --
> https://petertodd.org 'peter'[:-1]@petertodd.org
>

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<div dir=3D"ltr"><div>Hi Peter,</div><div><br></div><div>For the most princ=
ipled of reasons:</div><div><br></div>Because I have to change test vectors=
 everywhere!<div><br></div><div>Greg</div></div><br><div class=3D"gmail_quo=
te"><div dir=3D"ltr" class=3D"gmail_attr">On Thu, Feb 2, 2023 at 9:52 AM Pe=
ter Todd &lt;<a href=3D"mailto:pete@petertodd.org" target=3D"_blank">pete@p=
etertodd.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" styl=
e=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddin=
g-left:1ex">On Fri, Jan 27, 2023 at 09:05:20AM -0500, Greg Sanders via bitc=
oin-dev wrote:<br>
&gt; Hello again dev,<br>
&gt; <br>
&gt; Due to the interest in the proposal and the prodding of certain folks,=
 I&#39;ve<br>
&gt; written up a short draft BIP of the Ephemeral Anchors idea here:<br>
&gt; <a href=3D"https://github.com/instagibbs/bips/blob/ephemeral_anchor/bi=
p-ephemeralanchors.mediawiki" rel=3D"noreferrer" target=3D"_blank">https://=
github.com/instagibbs/bips/blob/ephemeral_anchor/bip-ephemeralanchors.media=
wiki</a><br>
&gt; <br>
&gt; The pull request at <a href=3D"https://github.com/bitcoin/bitcoin/pull=
/26403" rel=3D"noreferrer" target=3D"_blank">https://github.com/bitcoin/bit=
coin/pull/26403</a> has been<br>
&gt; refreshed on top of the latest V3 proposal, but the BIP itself is<br>
&gt; unaffected.<br>
<br>
The BIP states that:<br>
<br>
=C2=A0 =C2=A0 Why OP_2 not OP_TRUE? OP_TRUE is often used in test vectors, =
using OP_2 has<br>
=C2=A0 =C2=A0 the same benefits and none of these common collisions.<br>
<br>
Why is a &quot;collision&quot; harmful in this case?<br>
<br>
-- <br>
<a href=3D"https://petertodd.org" rel=3D"noreferrer" target=3D"_blank">http=
s://petertodd.org</a> &#39;peter&#39;[:-1]@<a href=3D"http://petertodd.org"=
 rel=3D"noreferrer" target=3D"_blank">petertodd.org</a><br>
</blockquote></div>

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