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[103.168.172.157]) by gmr-mx.google.com with ESMTPS id 6a1803df08f44-8953c044552si3712686d6.5.2026.02.09.23.53.14 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Feb 2026 23:53:14 -0800 (PST) Received-SPF: pass (google.com: domain of sjors@sprovoost.nl designates 103.168.172.157 as permitted sender) client-ip=103.168.172.157; Received: from phl-compute-05.internal (phl-compute-05.internal [10.202.2.45]) by mailfhigh.phl.internal (Postfix) with ESMTP id 8846814001A7; Tue, 10 Feb 2026 02:53:14 -0500 (EST) Received: from phl-imap-02 ([10.202.2.81]) by phl-compute-05.internal (MEProxy); Tue, 10 Feb 2026 02:53:14 -0500 X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefgedrtddtgdduleeludefucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepofggfffhvfevkfgjfhfutgesrgdtreerredtjeenucfhrhhomhepfdfujhhorhhs ucfrrhhovhhoohhsthdfuceoshhjohhrshesshhprhhovhhoohhsthdrnhhlqeenucggtf frrghtthgvrhhnpeeghfevuedvtdeluefhfeegkeduveelleelueehieeggfevgfeuffeh leehtefgfeenucffohhmrghinhepghhithhhuhgsrdgtohhmnecuvehluhhsthgvrhfuih iivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepshhjohhrshesshhprhhovhhoohhs thdrnhhlpdhnsggprhgtphhtthhopedvpdhmohguvgepshhmthhpohhuthdprhgtphhtth hopehmvghlvhhinhgtrghrvhgrlhhhohesghhmrghilhdrtghomhdprhgtphhtthhopegs ihhttghoihhnuggvvhesghhoohhglhgvghhrohhuphhsrdgtohhm X-ME-Proxy: Feedback-ID: ie5e042df:Fastmail Received: by mailuser.phl.internal (Postfix, from userid 501) id 3D04B700065; Tue, 10 Feb 2026 02:53:14 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface MIME-Version: 1.0 X-ThreadId: ABeHMYjL1NdV Date: Tue, 10 Feb 2026 08:53:15 +0100 From: "Sjors Provoost" To: "Melvin Carvalho" Cc: "'Bitcoin Development Mailing List'" Message-Id: <081ed43e-04e7-40d5-b61a-dc3957dc5d08@app.fastmail.com> In-Reply-To: References: <1A3B8BFA-41A6-4D0F-BBE6-E791F9785A5E@sprovoost.nl> Subject: Re: [bitcoindev] Bip54: add sequence, timestamp (and version) to GBT Content-Type: multipart/alternative; boundary=66b47217916241bfbb4b7c56d013d9fa X-Original-Sender: sjors@sprovoost.nl X-Original-Authentication-Results: gmr-mx.google.com; dkim=pass header.i=@sprovoost.nl header.s=fm1 header.b=m2PIypXl; dkim=pass header.i=@messagingengine.com header.s=fm3 header.b=UUp6VQIV; spf=pass (google.com: domain of sjors@sprovoost.nl designates 103.168.172.157 as permitted sender) smtp.mailfrom=sjors@sprovoost.nl; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=sprovoost.nl Precedence: list Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com List-ID: X-Google-Group-Id: 786775582512 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Score: -0.7 (/) --66b47217916241bfbb4b7c56d013d9fa Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Feb 10, 2026, at 06:12, Melvin Carvalho wrote: >=20 >>=20 >> SegWit had its own BIP for adding fields, but that was a significantly b= igger lift. My preference would be to just extend BIP54, as I've done below= . >>=20 >> Feel free to respond on the list or here: https://github.com/bitcoin/bip= s/pull/2097 >=20 > BIP54=E2=80=99s consensus fixes are currently uncontroversial. >=20 > Bundling new getblocktemplate additions into it changes that and expands = the policy surface. Those additions should be specified separately, where t= hey belong. Hi Melvin, What do you mean by "policy surface" and how is it expanded? The fields do = not add new rules to the proposal, they merely make implementation easier a= nd safer. Why do new fields "belong" elsewhere? - Sjors --=20 You received this message because you are subscribed to the Google Groups "= Bitcoin Development Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an e= mail to bitcoindev+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/bitcoindev/= 081ed43e-04e7-40d5-b61a-dc3957dc5d08%40app.fastmail.com. --66b47217916241bfbb4b7c56d013d9fa Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

=
On Tue, Feb 10, 2026, at 06:12, Melvin Carvalho wrote:
=


SegWit had its own BIP for adding fields, but that was a significa= ntly bigger lift. My preference would be to just extend BIP54, as I've done= below.

Feel free to respond on the list or here= : https://github.com/bitcoin/bips/pull/2097

BIP54=E2=80=99s consensus fixes are currently un= controversial.

Bundling new getblocktemplate addit= ions into it changes that and expands the policy surface. Those additions s= hould be specified separately, where they belong.

Hi Melvin,

What do yo= u mean by "policy surface" and how is it expanded? The fields do not add ne= w rules to the proposal, they merely make implementation easier and safer.<= /div>

Why do new fields "belong" elsewhere?
- Sjors

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