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It should be needless to say, but this idea is utter insanity.
Disappointing to see positive responses, and not one sensible reply
calling it out yet. The bugs should be fixed, not the abuse embraced. If
attackers continue to bypass filters, we can go back to a full whitelist
approach. We're now 2+ years into this wave of attacks, and the damage
it has already done should be more than enough to prove the hands-off
attitude is not viable. Am I the only one left on this list who actually
cares about Bitcoin's survival?
On 4/17/25 14:52, 'Antoine Poinsot' via Bitcoin Development Mailing List
wrote:
> Hi,
>
> Standardness rules exist for 3 mains reasons: mitigate DoS vectors,
> provide upgrade hooks, or as a nudge to deter some usages.
>
> Bitcoin Core will by default only relay and mine transactions with at
> most a single OP_RETURN output, with a scriptPubKey no larger than 83
> bytes. This standardness rule falls into the third category: it aims
> to mildly deter data storage while still allowing a less harmful
> alternative than using non-provably-unspendable outputs.
>
> Developers are now designing constructions that work around these
> limitations. An example is Clementine, the recently-announced Citrea
> bridge, which uses unspendable Taproot outputs to store data in its
> "WatchtowerChallenge" transaction due to the standardness restrictions
> on the size of OP_RETURNs[^0]. Meanwhile, we have witnessed in recent
> years that the nudge is ineffective to deter storing data onchain.
>
> Since the restrictions on the usage of OP_RETURN outputs encourage
> harmful practices while being ineffective in deterring unwanted usage,
> i propose to drop them. I suggest to start by lifting the restriction
> on the size of the scriptPubKey for OP_RETURN outputs, as a first
> minimal step to stop encouraging harmful behaviour, and to then
> proceed to lift the restriction on the number of OP_RETURN outputs per
> transactions.
>
> Antoine Poinsot
>
> [^0]: See section 6.1 of their whitepaper here
> https://citrea.xyz/clementine_whitepaper.pdf
> --
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> Groups "Bitcoin Development Mailing List" group.
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<p>It should be needless to say, but this idea is utter insanity.
Disappointing to see positive responses, and not one sensible
reply calling it out yet. The bugs should be fixed, not the abuse
embraced. If attackers continue to bypass filters, we can go back
to a full whitelist approach. We're now 2+ years into this wave of
attacks, and the damage it has already done should be more than
enough to prove the hands-off attitude is not viable. Am I the
only one left on this list who actually cares about Bitcoin's
survival?</p>
<div class=3D"moz-cite-prefix">On 4/17/25 14:52, 'Antoine Poinsot' via
Bitcoin Development Mailing List wrote:<br>
</div>
<blockquote type=3D"cite"
cite=3D"mid:rhfyCHr4RfaEalbfGejVdolYCVWIyf84PT2062DQbs5-eU8BPYty5sGyvI3hKeR=
ZQtVC7rn_ugjUWFnWCymz9e9Chbn7FjWJePllFhZRKYk=3D@protonmail.com">
<div>
<div
class=3D"protonmail_signature_block protonmail_signature_block-empty">
<div
class=3D"protonmail_signature_block-user protonmail_signature_block-empty">
</div>
<div
class=3D"protonmail_signature_block-proton protonmail_signature_block-empty=
">
</div>
</div>
Hi,<br>
<br>
Standardness rules exist for 3 mains reasons: mitigate DoS
vectors, provide upgrade hooks, or as a nudge to deter some
usages.</div>
<div><br>
</div>
<div>Bitcoin Core will by default only relay and mine transactions
with at most a single OP_RETURN output, with a scriptPubKey no
larger than 83 bytes. <span>This standardness rule falls into
the third category: it aims to mildly deter data storage while
still allowing a less harmful alternative than using
non-provably-unspendable outputs.</span></div>
<div><span><br>
</span></div>
<div>Developers are now designing constructions that work around
these limitations. An example is Clementine, the
recently-announced Citrea bridge, which uses unspendable Taproot
outputs to store data in its "WatchtowerChallenge" transaction
due to the standardness restrictions on the size of
OP_RETURNs[^0]. Meanwhile, we have witnessed in recent years
that the nudge is ineffective to deter storing data onchain.</div>
<div><br>
</div>
<div>Since the restrictions on the usage of OP_RETURN outputs
encourage harmful practices while being ineffective in deterring
unwanted usage, i propose to drop them. I suggest to start by
lifting the restriction on the size of the scriptPubKey for
OP_RETURN outputs, as a first minimal step to stop encouraging
harmful behaviour, and to then proceed to lift the restriction
on the number of OP_RETURN outputs per transactions.<br>
</div>
<div><br>
</div>
<div>Antoine Poinsot<br>
</div>
<div><br>
</div>
<div>[^0]: See section 6.1 of their whitepaper here <span><a
target=3D"_blank" rel=3D"noreferrer nofollow noopener"
href=3D"https://citrea.xyz/clementine_whitepaper.pdf"
moz-do-not-send=3D"true" class=3D"moz-txt-link-freetext">https:=
//citrea.xyz/clementine_whitepaper.pdf</a></span><br>
</div>
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