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From: Greg Sanders <gsanders87@gmail.com>
Date: Wed, 12 Oct 2022 09:28:22 -0400
Message-ID: <CAB3F3Dt5oy93duGvYb7SZ7wn7DCvn9FjVwRU9ENNa79yjzmdCQ@mail.gmail.com>
To: John Light <bitcoin-dev@lightco.in>, 
 Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
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Subject: Re: [bitcoin-dev] Validity Rollups on Bitcoin
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Thanks for the writeup John,

Is there a one page cheat sheet of "asks" for transaction
introspection/OP_ZKP(?) and their uses both separately and together for
different rollup architectures?

On Tue, Oct 11, 2022 at 11:52 AM John Light via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Hi all,
>
> Today I am publishing "Validity Rollups on Bitcoin", a report I produced
> as part of the Human Rights Foundation's ZK-Rollup Research Fellowship.
>
> Here's the preface:
>
> > Ever since Satoshi Nakamoto first publicly announced bitcoin, its
> supporters, critics, and skeptics alike have questioned how the protocol
> would scale as usage increases over time. This question is more important
> than ever today, as blocks are increasingly full or close to full of
> transactions. So-called "Layer 2" (L2) protocols such as the Lightning
> Network have been deployed to take some transaction volume "offchain" but
> even Lightning needs to use _some_ bitcoin block space. It's clear that as
> bitcoin is adopted by more and more of the world's population (human and
> machine alike!) more block space will be needed. Another thread of inquiry
> concerns whether bitcoin's limited scripting capabilities help or hinder
> its value as electronic cash. Researchers and inventors have shown that the
> electronic cash transactions first made possible by bitcoin could be given
> new form by improving transaction privacy, supporting new types of smart
> contracts, and even creating entirely new blockchain-based assets.
> >
> > One of the results of the decade-plus research into scaling and
> expanding the capabilities of blockchains such as bitcoin is the invention
> of the validity rollup. Given the observed benefits that validity rollups
> have for the blockchains that have already implemented them, attention now
> turns to the question of whether they would be beneficial for bitcoin and
> existing bitcoin L2 protocols such as Lightning, too. We explore this
> question by examining validity rollups from several angles, including their
> history, how they work on a technical level, how they could be built on
> bitcoin, and what the benefits, costs, and risks of building them on
> bitcoin might be. We conclude that validity rollups have the potential to
> improve the scalability, privacy, and programmability of bitcoin without
> sacrificing bitcoin's core values or functionality as a peer-to-peer
> electronic cash system. Given the "trustless" nature of validity rollups as
> cryptographically-secured extensions of their parent chain, and given
> bitcoin's status as the most secure settlement layer, one could even say
> these protocols are a _perfect match_ for one another.
>
> You can find the full report here:
>
> https://bitcoinrollups.org
>
> Happy to receive any comments and answer any questions the bitcoin dev
> community may have about the report!
>
> Best regards,
> John Light
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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<div dir=3D"ltr"><div>Thanks for the writeup John,</div><div><br></div>Is t=
here a one page cheat sheet of &quot;asks&quot; for transaction introspecti=
on/OP_ZKP(?) and their uses both separately and together for different roll=
up architectures?</div><br><div class=3D"gmail_quote"><div dir=3D"ltr" clas=
s=3D"gmail_attr">On Tue, Oct 11, 2022 at 11:52 AM John Light via bitcoin-de=
v &lt;<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@=
lists.linuxfoundation.org</a>&gt; wrote:<br></div><blockquote class=3D"gmai=
l_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,20=
4,204);padding-left:1ex">Hi all,<br>
<br>
Today I am publishing &quot;Validity Rollups on Bitcoin&quot;, a report I p=
roduced as part of the Human Rights Foundation&#39;s ZK-Rollup Research Fel=
lowship.<br>
<br>
Here&#39;s the preface:<br>
<br>
&gt; Ever since Satoshi Nakamoto first publicly announced bitcoin, its supp=
orters, critics, and skeptics alike have questioned how the protocol would =
scale as usage increases over time. This question is more important than ev=
er today, as blocks are increasingly full or close to full of transactions.=
 So-called &quot;Layer 2&quot; (L2) protocols such as the Lightning Network=
 have been deployed to take some transaction volume &quot;offchain&quot; bu=
t even Lightning needs to use=C2=A0_some_=C2=A0bitcoin block space. It&#39;=
s clear that as bitcoin is adopted by more and more of the world&#39;s popu=
lation (human and machine alike!) more block space will be needed. Another =
thread of inquiry concerns whether bitcoin&#39;s limited scripting capabili=
ties help or hinder its value as electronic cash. Researchers and inventors=
 have shown that the electronic cash transactions first made possible by bi=
tcoin could be given new form by improving transaction privacy, supporting =
new types of smart contracts, and even creating entirely new blockchain-bas=
ed assets.<br>
&gt; <br>
&gt; One of the results of the decade-plus research into scaling and expand=
ing the capabilities of blockchains such as bitcoin is the invention of the=
 validity rollup. Given the observed benefits that validity rollups have fo=
r the blockchains that have already implemented them, attention now turns t=
o the question of whether they would be beneficial for bitcoin and existing=
 bitcoin L2 protocols such as Lightning, too. We explore this question by e=
xamining validity rollups from several angles, including their history, how=
 they work on a technical level, how they could be built on bitcoin, and wh=
at the benefits, costs, and risks of building them on bitcoin might be. We =
conclude that validity rollups have the potential to improve the scalabilit=
y, privacy, and programmability of bitcoin without sacrificing bitcoin&#39;=
s core values or functionality as a peer-to-peer electronic cash system. Gi=
ven the &quot;trustless&quot; nature of validity rollups as cryptographical=
ly-secured extensions of their parent chain, and given bitcoin&#39;s status=
 as the most secure settlement layer, one could even say these protocols ar=
e a=C2=A0_perfect match_=C2=A0for one another.<br>
<br>
You can find the full report here:<br>
<br>
<a href=3D"https://bitcoinrollups.org" rel=3D"noreferrer" target=3D"_blank"=
>https://bitcoinrollups.org</a><br>
<br>
Happy to receive any comments and answer any questions the bitcoin dev comm=
unity may have about the report!<br>
<br>
Best regards,<br>
John Light<br>
_______________________________________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.org/mail=
man/listinfo/bitcoin-dev</a><br>
</blockquote></div>

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