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Date: Thu, 02 Oct 2025 22:47:38 +0000
To: Andrew Poelstra <apoelstra@wpsoftware.net>
From: "'moonsettler' via Bitcoin Development Mailing List" <bitcoindev@googlegroups.com>
Cc: PortlandHODL <admin@qrsnap.io>, Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: Re: [bitcoindev] [BIP Proposal] Limit ScriptPubkey Size >= 520 Bytes Consensus.
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Hi All,
Agreed, this is something we should consider.
> I would even suggest going lower than 520 bytes.
200 should be enough.
If this should apply to OP_RETURN (nulldata) or not, is something I can't make my mind up on.
BR,
moonsettler
Sent with Proton Mail secure email.
On Friday, October 3rd, 2025 at 12:31 AM, Andrew Poelstra <apoelstra@wpsoftware.net> wrote:
> On Thu, Oct 02, 2025 at 01:42:06PM -0700, PortlandHODL wrote:
>
> > Proposing: Softfork to after (n) block height; the creation of outpoints
> > with greater than 520 bytes in the ScriptPubkey would be consensus invalid.
>
>
> Personally, I like this. Unlike restrictions on opcode behavior or
> witness data, it is impossible for there to be any existing UTXOs which
> "might turn out to need" scriptpubkeys greater than 520 bytes. In a
> post-covenant world I suppose this could change.
>
> There is a risk of confiscation of coins which have pre-signed but
> unpublished transactions spending them to new outputs with large
> scriptPubKeys. Due to long-standing standardness rules, and the presence
> of P2SH (and now P2WSH) for well over a decade, I'm skeptical that any
> such transactions exist.
>
> In any case, if confiscation is a worry, as always we can exempt the
> current UTXO set from the rule -- if you are only spending outputs that
> existed prior to the new rule, your new UTXOs are allowed to be large.
>
>
> I would even suggest going lower than 520 bytes.
>
>
> --
> Andrew Poelstra
> Director, Blockstream Research
> Email: apoelstra at wpsoftware.net
> Web: https://www.wpsoftware.net/andrew
>
> The sun is always shining in space
> -Justin Lewis-Webster
>
> --
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