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From: Jeremy Rubin <jeremy.l.rubin@gmail.com>
Date: Thu, 28 Apr 2022 05:23:32 -0700
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Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] CTV Signet Parameters
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Sorry I didn't see this snippet fully earlier, but I caught it in Optech
(cc harding)


> *(I didn't think DROP/1 is necessary here? Doesn't leaving the 32 byte*
> *hash on the stack evaluate as true? I guess that means everyone's using**sapio to
> construct the txs?)*


Not quite: it would mean that everyone is using *sapio-miniscript**, *which
may or may not be in Sapio, or they are using a different miniscript
implementation that is compatible with sapio-miniscript's CTV fragment
(which is sort of the most obvious way to implement it), or they are hand
writing the script and are still using that fragment.

E.g., you can see
https://min.sc/nextc/#gist=001cf1fcb0e24ca9f3614c4db9bfe57d:2 or
https://min.sc/nextc/#gist=001cf1fcb0e24ca9f3614c4db9bfe57d:0 both of these
might "look" like sapio, but are built using minsc.

The underlying point might still stand, but using miniscript seems
different than using Sapio.

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<div dir=3D"ltr"><div><div class=3D"gmail_default" style=3D"font-family:ari=
al,helvetica,sans-serif;font-size:small;color:rgb(0,0,0)">Sorry I didn&#39;=
t see this snippet fully earlier, but I caught it in Optech (cc harding)</d=
iv></div><div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0=
px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-=
color:rgb(204,204,204);padding-left:1ex"><i>(I didn&#39;t think DROP/1 is n=
ecessary here? Doesn&#39;t leaving the 32 byte<br></i><i>hash on the stack =
evaluate as true?<b> I guess that means everyone&#39;s using<br></b></i><i>=
<b><span class=3D"gmail-il">sapio</span><span class=3D"gmail-Apple-converte=
d-space">=C2=A0</span></b>to construct the txs?)</i></blockquote><div><i><b=
r></i></div><span class=3D"gmail_default" style=3D"font-size:small">Not qui=
te: it would mean that everyone is using <i>sapio-miniscript</i></span><spa=
n class=3D"gmail_default" style=3D"font-style:italic;font-family:arial,helv=
etica,sans-serif;font-size:small;color:rgb(0,0,0)"></span><span class=3D"gm=
ail_default" style=3D"font-style:italic;font-family:arial,helvetica,sans-se=
rif;font-size:small;color:rgb(0,0,0)"></span><span class=3D"gmail_default" =
style=3D"font-family:arial,helvetica,sans-serif;font-size:small;color:rgb(0=
,0,0)"><i>, </i>which may or may not be in Sapio, or they are using a diffe=
rent miniscript implementation that is compatible with sapio-miniscript&#39=
;s CTV fragment (which is sort of the most obvious way to implement it), or=
 they are hand writing the script and are still using that fragment.</span>=
<div><span class=3D"gmail_default" style=3D"font-family:arial,helvetica,san=
s-serif;font-size:small;color:rgb(0,0,0)"><br></span></div><div><span class=
=3D"gmail_default" style=3D"font-family:arial,helvetica,sans-serif;font-siz=
e:small;color:rgb(0,0,0)">E.g., you can see=C2=A0<a href=3D"https://min.sc/=
nextc/#gist=3D001cf1fcb0e24ca9f3614c4db9bfe57d:2">https://min.sc/nextc/#gis=
t=3D001cf1fcb0e24ca9f3614c4db9bfe57d:2</a> or=C2=A0<a href=3D"https://min.s=
c/nextc/#gist=3D001cf1fcb0e24ca9f3614c4db9bfe57d:0">https://min.sc/nextc/#g=
ist=3D001cf1fcb0e24ca9f3614c4db9bfe57d:0</a>=C2=A0</span><span style=3D"col=
or:rgb(0,0,0);font-family:arial,helvetica,sans-serif">both of these might &=
quot;look&quot; like sapio, but are built using minsc.</span></div><div><sp=
an style=3D"color:rgb(0,0,0);font-family:arial,helvetica,sans-serif"><br></=
span></div><span class=3D"gmail_default" style=3D"font-size:small">The unde=
rlying point might still stand, but using miniscript seems different than u=
sing Sapio.</span><span class=3D"gmail_default" style=3D"font-family:arial,=
helvetica,sans-serif;font-size:small;color:rgb(0,0,0)"></span><div><br></di=
v></div>

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