From: Murch <murch@murch.one>
To: bitcoindev@googlegroups.com
Cc: Sjors Provoost <sjors@sprovoost.nl>
Subject: Re: [bitcoindev] Addressing remaining points on BIP 54
Date: Tue, 13 Jan 2026 16:23:34 -0800 [thread overview]
Message-ID: <492f9bba-8a1f-4fa2-8618-98bd564a6178@murch.one> (raw)
In-Reply-To: <9C946151-D6DD-4CB7-B524-15FD9F625D9D@sprovoost.nl>
Hi Sjors,
On 2026-01-08 00:30, Sjors Provoost wrote:
> The approach suggested by Towns [4] of appending a 0-sat OP_RETURN output with
> padding so a 4-byte nonce lands in the final 64-byte SHA256 chunk is probably
> better, but not because like nLockTime it has a small hashing midstate
> benefit. It's easier to implement.
I can’t access Delving right now to read AJ’s comment, but a small nit
on the idea of using an additional output: BIP 141 requires coinbase
transaction inputs to have a 32-byte witness. Since the witness section
follows the outputs in the serialization, the bytes before the
`nLocktime` in a coinbase transaction are the witness of the coinbase
input, not the last output script.
-Murch
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next prev parent reply other threads:[~2026-01-14 0:27 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-30 15:59 'Antoine Poinsot' via Bitcoin Development Mailing List
2026-01-08 4:29 ` [bitcoindev] " Antoine Riard
2026-01-08 8:30 ` [bitcoindev] " Sjors Provoost
2026-01-08 16:36 ` Matt Corallo
2026-01-13 2:16 ` Antoine Riard
2026-01-13 16:59 ` Mubarek Juhar
2026-01-08 16:40 ` Matt Corallo
2026-01-13 1:49 ` Antoine Riard
2026-01-14 0:23 ` Murch [this message]
2026-01-14 10:15 ` Sjors Provoost
2026-01-14 15:33 ` 'Antoine Poinsot' via Bitcoin Development Mailing List
2026-01-14 18:58 ` Murch
2026-01-30 4:08 ` Antoine Riard
2026-02-05 22:48 ` 'Antoine Poinsot' via Bitcoin Development Mailing List
2026-02-12 3:57 ` Antoine Riard
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