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To: /dev /fd0 <alicexbtong@gmail.com>
From: "'moonsettler' via Bitcoin Development Mailing List" <bitcoindev@googlegroups.com>
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Subject: Re: [bitcoindev] Re: [BIP Proposal] Limit ScriptPubkey Size >= 520
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Hi Floppy,
There are only weak arguments for this proposal to extend to OP_RETURN, at =
least nothing I would normally entertain;
but also there are weak arguments to make an exception for OP_RETURN explic=
itly.
People could just add many OP_RETURNs to a transaction, that makes it more =
cumbersome and marginally more expensive.
BR,
moonsettler
On Friday, October 3rd, 2025 at 10:58 AM, /dev /fd0 <alicexbtong@gmail.com>=
wrote:
> Hi portlandhodl,
>=20
> We can't predict future usage, so it would be great if this was restricte=
d to OP_RETURN. While there is no real use for a scriptPubKey larger than 5=
20 bytes as shown in the data you shared, it is possible that users may cre=
ate more OP_RETURN outputs after this change. It does not affect the UTXO s=
et but will cost more and economically discourage the use of multiple OP_RE=
TURN outputs.
>=20
> /dev/fd0
> floppy disk guy
> On Friday, October 3, 2025 at 3:29:24=E2=80=AFAM UTC+5:30 PortlandHODL wr=
ote:
>=20
> > Proposing: Softfork to after (n) block height; the creation of outpoint=
s with greater than 520 bytes in the ScriptPubkey would be consensus invali=
d.
> >=20
> > This is my gathering of information per BIP 0002
> >=20
> > After doing some research into the number of outpoints that would have =
violated the proposed rule there are exactly 169 outpoints. With only 8 bei=
ng non OP_RETURN. I think after 15 years and not having discovered use for =
'large' ScriptPubkeys; the reward for not invalidating them at the consensu=
s level is lower than the risk of their abuse.
> >=20
> > - Reasons for
> > - Makes DoS blocks likely impossible to create that would have an=
y sufficient negative impact on the network.
> > - Leaves enough room for hooks long term
> > - Would substantially reduce the divergence between consensus and=
relay policy
> > - Incredibly little use onchain as evidenced above.
> > - Could possibly reduce codebase complexity. Legacy Script is lar=
gely considered a mess though this isn't a complete disablement it should r=
educe the total surface that is problematic.
> > - Would make it harder to use the ScriptPubkey as a 'large' datac=
arrier.
> > - Possible UTXO set size bloat reduction.
> > =20
> > - Reasons Against
> > - Bitcoin could need it in the future? Quantum?
> > - Users could just create more outpoints.
> >=20
> > Thoughts?
> >=20
> > source of onchain data
> >=20
> > PortlandHODL
>=20
> --
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