Re: [bitcoindev] Human meaningful witness versioningHEADmaster

1 files changed, 259 insertions, 0 deletions

diff --git a/6b/6dabf0d0cdffae8b1b4779eb7a039b50a043df b/6b/6dabf0d0cdffae8b1b4779eb7a039b50a043df
new file mode 100644
index 000000000..1e16b5598
--- /dev/null
+++ b/6b/6dabf0d0cdffae8b1b4779eb7a039b50a043df
@@ -0,0 +1,259 @@
+Delivery-date: Fri, 18 Jul 2025 15:56:31 -0700
+Received: from mail-yb1-f183.google.com ([209.85.219.183])
+	by mail.fairlystable.org with esmtps  (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
+	(Exim 4.94.2)
+	(envelope-from <bitcoindev+bncBAABBFNC5PBQMGQEGX7VLUI@googlegroups.com>)
+	id 1ucu0F-00035V-2o
+	for bitcoindev@gnusha.org; Fri, 18 Jul 2025 15:56:31 -0700
+Received: by mail-yb1-f183.google.com with SMTP id 3f1490d57ef6-e8bb626b2b3sf2654126276.1
+        for <bitcoindev@gnusha.org>; Fri, 18 Jul 2025 15:56:30 -0700 (PDT)
+ARC-Seal: i=2; a=rsa-sha256; t=1752879385; cv=pass;
+        d=google.com; s=arc-20240605;
+        b=kkJNpHE04f9rdbl4QQG1ZapHL/WZXIDNgq0Q2YfMs2g5WnceiC3hsG1kilWgExNQ9A
+         +axWlmsQk32qUARQIn0A7qGoMlNBVjmRdlh6U9ofXp1f9vFbTJsngcMNM1NpWnfrAAKn
+         6pbGPYKOpL6BH4GcDaBtOF0nrnMqnqcvArNTttBxZ5u7yO32JfTtpzCXNlwyTILk8Mol
+         aBMXy6MJicrju6T7ey4J18zwFv8koRvURJ78J2jHWj+ijCtDUVw70v5lB7U/u4Uf3DIL
+         PJivG7we/jG1EY0Amm2ykvujiZUrwmIzHO4nFKEgdpCEsrpnv0UMo5c0XwlamG6pWO7+
+         cnzA==
+ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605;
+        h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post
+         :list-id:mailing-list:precedence:reply-to:content-transfer-encoding
+         :mime-version:feedback-id:references:in-reply-to:message-id:subject
+         :from:to:date:dkim-signature;
+        bh=mvPbHfP8ocJaW/wO0ecG0HZeenDJh/TrbTH8PNJdyE4=;
+        fh=IcjCQ1LtPr+sYlWdTLEYThbDPwZ0BT2URJ4qBnTR2sQ=;
+        b=jvgtjS60SF3FUeNgfB2FNNzGvDkA/K3sUNz3OszHwVWh+nhin1gWSAPBtFMRIwHc/Q
+         cC4MEJrM1GgIfpITe181EDEbCRpw7hPNIByx9KBvNe4X2kmO5gLU5wAsEhdM/4rf/X3B
+         D4CQwA+NPtMkWwjGOsr/2FYnjwN+LZ/YlqYutHypU4nsbJObgyMjpAbDi4Er+yPy5ALC
+         zr2zdwfCWg0b8T2j6jUyPutbklwJ5fO2XEh0EcCaE8sxfhFk2IC37vljqI6ICt5YOgNn
+         LHmUxvYnv/vGqjChR9e1L2xnbLnH0LkmUDBOmU/DIGKj4Ujw44xLmGWYYpIerhWqUPIz
+         LWew==;
+        darn=gnusha.org
+ARC-Authentication-Results: i=2; gmr-mx.google.com;
+       dkim=pass header.i=@achow101.com header.s=protonmail3 header.b=ImSb68it;
+       spf=pass (google.com: domain of lists@achow101.com designates 79.135.106.25 as permitted sender) smtp.mailfrom=lists@achow101.com;
+       dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=achow101.com
+DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
+        d=googlegroups.com; s=20230601; t=1752879385; x=1753484185; darn=gnusha.org;
+        h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post
+         :list-id:mailing-list:precedence:reply-to
+         :x-original-authentication-results:x-original-sender
+         :content-transfer-encoding:mime-version:feedback-id:references
+         :in-reply-to:message-id:subject:from:to:date:from:to:cc:subject:date
+         :message-id:reply-to;
+        bh=mvPbHfP8ocJaW/wO0ecG0HZeenDJh/TrbTH8PNJdyE4=;
+        b=aJCXYYANStxsSa/RLThCmxRTKANMNu49flr9wt/SIKKlgJwCwchybAg6TJ/6RbeBvy
+         o5DUEqP84gwjQobuT6UQAiHXEAalLRwsoTIMED5EWNWr9EL+//oBmYjkKSAvanOSQJwU
+         iVsvs43aPveIfNMOKMEFjeO2v0anJah1GYKglvIf7EYjrY8Zl8Rjwtfh3JjqGgg7N9Md
+         xHixYQIhc4yCrSZwdheILaj1BsBnSKPHMr+w60ZIbjdssNpbusOdgG98S10eoavPR/fp
+         7E1Zf+Sn7Q5jeheJt0yXfMppXYPFddGlScsuzNhnPbjZhcvGledupQk1huQXhspOl9f6
+         zNWw==
+X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
+        d=1e100.net; s=20230601; t=1752879385; x=1753484185;
+        h=list-unsubscribe:list-subscribe:list-archive:list-help:list-post
+         :list-id:mailing-list:precedence:reply-to
+         :x-original-authentication-results:x-original-sender
+         :content-transfer-encoding:mime-version:feedback-id:references
+         :in-reply-to:message-id:subject:from:to:date:x-beenthere
+         :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to;
+        bh=mvPbHfP8ocJaW/wO0ecG0HZeenDJh/TrbTH8PNJdyE4=;
+        b=fV89ArY2FX0m23WKxpif2nceGe7rWh2ZobIhz0Xjryz7vYI9XeU0nuL4Pz1+odfs+S
+         tra0v7aFGTLEHdSkGFqJqYOo75Emsk9lwTDMHwW4H683sYBioOp2lD+TbmVI8FjPyLMl
+         xkRIcOzJet5vxDABjFzz936aBANIwAqTO/rz/uJa3aa26atxNxisly6GrLxdnNi5lYxM
+         Cx1m+FofdkxEoYDuFjwm1oXhYNRFKsLKijeRWyi/6f4ihtB6dVu7XnVtd6ocSTNmpTCJ
+         kVLuVabZqxssLlbhSwGCmWs7atYXm65WMDqhA/I8u64sMS274WmGWrNVhVisttCHjWfn
+         PrDw==
+X-Forwarded-Encrypted: i=2; AJvYcCVuH7elqVp/mamo57K5NVl3rKtOHvpahPposHBcjg6Be4qtIiA2nCeSYHiXpTlz32EMSPqsdLTEvxjJ@gnusha.org
+X-Gm-Message-State: AOJu0Yxa3xwUZxv6Z/A4SM6MKu9BnuczAHfK3nKIHilcoEBMZOCWdUwW
+	/owGWgCHSGslhdYuQvrJCi07d4oR4RPjevK/TqeorM1BXWejlCNnTAS7
+X-Google-Smtp-Source: AGHT+IGFuyn0Lz+riBS5PbqcIdZmrc9vQUpvKihfVtgGq5pvGDuTgFUhYK8Ql+tN/hnN1EUNofHwBw==
+X-Received: by 2002:a05:6902:4886:b0:e8b:d0e7:3afe with SMTP id 3f1490d57ef6-e8c56d0e86cmr10484083276.4.1752879384739;
+        Fri, 18 Jul 2025 15:56:24 -0700 (PDT)
+X-BeenThere: bitcoindev@googlegroups.com; h=AZMbMZeunMBBigQWWiuvGj4vdLhT07tq9OcKW6DgiZsQ1dJOVw==
+Received: by 2002:a05:6902:2885:b0:e87:bdd0:75fc with SMTP id
+ 3f1490d57ef6-e8d88a7e272ls607833276.2.-pod-prod-03-us; Fri, 18 Jul 2025
+ 15:56:20 -0700 (PDT)
+X-Received: by 2002:a05:690c:8691:10b0:719:59cb:a1c2 with SMTP id 00721157ae682-71959cba260mr27911437b3.9.1752879380573;
+        Fri, 18 Jul 2025 15:56:20 -0700 (PDT)
+Received: by 2002:a50:d5c4:0:b0:608:b921:5113 with SMTP id 4fb4d7f45d1cf-612c239df2amsa12;
+        Fri, 18 Jul 2025 15:46:49 -0700 (PDT)
+X-Received: by 2002:a05:6402:520c:b0:608:a7a0:48 with SMTP id 4fb4d7f45d1cf-6128262b18dmr11865398a12.28.1752878806959;
+        Fri, 18 Jul 2025 15:46:46 -0700 (PDT)
+ARC-Seal: i=1; a=rsa-sha256; t=1752878806; cv=none;
+        d=google.com; s=arc-20240605;
+        b=OuXiix/9D+JwHsvKa1i+W+NgyEbJM8vqLeTJYt5VvgMaCPMk22cw51V4xj06/ClD2J
+         YnIKK9r0mhTusSdcaHQlzk0As025LwRsNqQNt0vpJvNcolHVdviaP6CnlWAg+6z+vjD/
+         vsMucikH4PkciwHeBlarm0R7+mpV5VYqh+moB8oV9wEuqn9sy0vBZZ3kSMS+lbRh0P7m
+         R4RlICeu+QMfu5eRF95pufSyjUWo/9Twg8TkIxSF8qgKrjIqV2Cvn7XewC2BQgjGNreC
+         A4H8SKWhmkdRypz/9KXKcSwKV9NdQN/lMnisJoqJ73SVXegMPpxS2ipbPdoltv62nJu7
+         aHsg==
+ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20240605;
+        h=content-transfer-encoding:mime-version:feedback-id:references
+         :in-reply-to:message-id:subject:from:to:date:dkim-signature;
+        bh=v6XOwSShYlBpongh6rz3n13Am1wzRA3+pmFvYhc4C2Q=;
+        fh=VcGcg+Zjs9gw1uDcHbxsAILhBAcecnbJzZRdxgKVDIc=;
+        b=b3LYhFDmqkvAA0u9KqL+kwj7kSZccbJgungBAncCB7gYhinwzkRfni/Zol+LALhihh
+         33XK59f1/HNQ0KiQm7YK5jtw6TwAFSwu2e4d7db2ZRttYWXAAGQLYHf7Dpxih9GjP3rX
+         SZVnbH6L/ORiaQpFYfw/Cj6yhYz3oRnfOww6TZPTP6hQr+XsZj3p2Z+E4Fhvb79Zlxo5
+         s5oQCkAtv6I+dSWrUzoj90MLq2sW2/Mmz6WcnKhFKZyAHplH4oMDFo/VLLVZ6iMKK654
+         bPQNap+TRshOx80rE4gSQ/nibbF8cOj8ENesM6o37RpXCRyyhwX7lsjVASaUmJgpMuus
+         3LcA==;
+        dara=google.com
+ARC-Authentication-Results: i=1; gmr-mx.google.com;
+       dkim=pass header.i=@achow101.com header.s=protonmail3 header.b=ImSb68it;
+       spf=pass (google.com: domain of lists@achow101.com designates 79.135.106.25 as permitted sender) smtp.mailfrom=lists@achow101.com;
+       dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=achow101.com
+Received: from mail-10625.protonmail.ch (mail-10625.protonmail.ch. [79.135.106.25])
+        by gmr-mx.google.com with ESMTPS id 4fb4d7f45d1cf-612c8f83372si67222a12.2.2025.07.18.15.46.46
+        for <bitcoindev@googlegroups.com>
+        (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);
+        Fri, 18 Jul 2025 15:46:46 -0700 (PDT)
+Received-SPF: pass (google.com: domain of lists@achow101.com designates 79.135.106.25 as permitted sender) client-ip=79.135.106.25;
+Date: Fri, 18 Jul 2025 22:46:38 +0000
+To: bitcoindev@googlegroups.com
+From: "'Ava Chow' via Bitcoin Development Mailing List" <bitcoindev@googlegroups.com>
+Subject: Re: [bitcoindev] Human meaningful witness versioning
+Message-ID: <d5b68a7e-0eea-465d-95f5-9cb6557697d8@achow101.com>
+In-Reply-To: <CAEM=y+WkLOVJ787jjr5zZgKsAHxHkgdZjANqGycEh4K7ZSddSA@mail.gmail.com>
+References: <CAEM=y+WkLOVJ787jjr5zZgKsAHxHkgdZjANqGycEh4K7ZSddSA@mail.gmail.com>
+Feedback-ID: 53660394:user:proton
+X-Pm-Message-ID: 4e268d987f78b81ca890b4250a652cf75fdd49da
+MIME-Version: 1.0
+Content-Type: text/plain; charset="UTF-8"
+Content-Transfer-Encoding: quoted-printable
+X-Original-Sender: lists@achow101.com
+X-Original-Authentication-Results: gmr-mx.google.com;       dkim=pass
+ header.i=@achow101.com header.s=protonmail3 header.b=ImSb68it;       spf=pass
+ (google.com: domain of lists@achow101.com designates 79.135.106.25 as
+ permitted sender) smtp.mailfrom=lists@achow101.com;       dmarc=pass
+ (p=REJECT sp=REJECT dis=NONE) header.from=achow101.com
+X-Original-From: Ava Chow <lists@achow101.com>
+Reply-To: Ava Chow <lists@achow101.com>
+Precedence: list
+Mailing-list: list bitcoindev@googlegroups.com; contact bitcoindev+owners@googlegroups.com
+List-ID: <bitcoindev.googlegroups.com>
+X-Google-Group-Id: 786775582512
+List-Post: <https://groups.google.com/group/bitcoindev/post>, <mailto:bitcoindev@googlegroups.com>
+List-Help: <https://groups.google.com/support/>, <mailto:bitcoindev+help@googlegroups.com>
+List-Archive: <https://groups.google.com/group/bitcoindev
+List-Subscribe: <https://groups.google.com/group/bitcoindev/subscribe>, <mailto:bitcoindev+subscribe@googlegroups.com>
+List-Unsubscribe: <mailto:googlegroups-manage+786775582512+unsubscribe@googlegroups.com>,
+ <https://groups.google.com/group/bitcoindev/subscribe>
+X-Spam-Score: -1.0 (-)
+
+Hi Ethan,
+
+I do not think that this is a good idea, and it undermines one of the=20
+ways that witness programs provide us flexibility when deploying soft=20
+forks in the form of varying witness program lengths.
+
+Both witness version 0 and version 1 define consensus rules for the pair=20
+of witness version and size of the witness program. A P2WPKH address and=20
+a P2WSH address have very different meanings, yet share the same witness=20
+version and therefore the same bc1q prefix. Their different rules are=20
+applied depending on the size of the witness program.
+
+While BIP 141 explicitly disallows the disallows the usage of other=20
+sizes when it defined version 0, BIP 341 made no such restrictions on=20
+version 1. Instead, the rules defined in BIP 341 only apply to witness=20
+programs of 32 bytes, thus allowing new rules to be applied to witness=20
+programs of other sizes that are also version 1.
+
+We have already seen such a proposal be deployed - Pay to Anchor outputs=20
+use witness version 1 with a 2 byte witness program of a particular value.
+
+If the witness version were chosen based on a mnemonic, then we largely=20
+lose the ability to define new rules for different sized witness=20
+programs of already in use witness versions. Such usage would cause=20
+mnemonics to lose their meaning, unless we expect users to also be=20
+checking the length of addresses, and I don't think that's a reasonable=20
+expectation.
+
+Ava
+
+On 07/18/2025 02:58 PM, Ethan Heilman wrote:
+> I want to propose a new criteria for allocating Witness versions based=20
+> on human meaningfulness and see if there is support for this approach or=
+=20
+> if the community is highly allergic to this idea.
+>=20
+> Bech32 (BIP-0173 <https://github.com/bitcoin/bips/blob/master/=20
+> bip-0173.mediawiki>) was designed such that the Witness version is the=20
+> first character in an address after the =E2=80=9Cbc1=E2=80=9D address pre=
+fix
+>=20
+> Witness Version 0: bc1q=E2=80=A6
+> Witness Version 1: bc1p=E2=80=A6
+>=20
+> Witness version 2: bc1z=E2=80=A6
+>=20
+> Witness version 3: bc1r=E2=80=A6
+>=20
+> Witness version 4: bc1y=E2=80=A6
+> Witness version 5: bc19=E2=80=A6
+>=20
+> Witness version 6: bc1x=E2=80=A6
+>=20
+> Witness version 7: bc18=E2=80=A6
+>=20
+> Witness version 8: bc1g=E2=80=A6
+>=20
+> =E2=80=A6
+>=20
+>=20
+> So far we have been allocating Witness Versions in incrementing numeric=
+=20
+> order (0,1,...). I want to suggest we allocate Witness Versions mnemonic=
+=20
+> to make it easier to look at an address and determine the output type.
+>=20
+>=20
+> This originally came up over the question of if BIP-360 should use=20
+> Witness Version 3 to get bc1r=E2=80=A6 for P2QRH (r for resistant) or the=
+ next=20
+> numerically available 2, but I want to see how the community feels about=
+=20
+> it as a general pattern for future softforks (z for compressed/zipped=20
+> output, y for yield outputs, etc=E2=80=A6).
+>=20
+>=20
+> Making it easier for users to understand the output type associated is=20
+> likely to grow in importance over time as we retire output types, add=20
+> policy restricting the relay of certain output types or output types=20
+> become insecure due to cryptanalytic breaks. While wallet software=20
+> should flag dangerous output types, some wallets may not invest in such=
+=20
+> functionality or the user may be using a paper wallet. This is the same=
+=20
+> argument as prefixing addresses with =E2=80=9Cbc=E2=80=9D for mainnet and=
+ =E2=80=9Ctc=E2=80=9D for testnet.
+>=20
+>=20
+> Note: the Witness version is sometimes called the SegWit version.
+>=20
+> Thanks,
+> Ethan
+>=20
+> --=20
+> You received this message because you are subscribed to the Google=20
+> Groups "Bitcoin Development Mailing List" group.
+> To unsubscribe from this group and stop receiving emails from it, send=20
+> an email to bitcoindev+unsubscribe@googlegroups.com=20
+> <mailto:bitcoindev+unsubscribe@googlegroups.com>.
+> To view this discussion visit https://groups.google.com/d/msgid/=20
+> bitcoindev/=20
+> CAEM%3Dy%2BWkLOVJ787jjr5zZgKsAHxHkgdZjANqGycEh4K7ZSddSA%40mail.gmail.com=
+=20
+> <https://groups.google.com/d/msgid/bitcoindev/=20
+> CAEM%3Dy%2BWkLOVJ787jjr5zZgKsAHxHkgdZjANqGycEh4K7ZSddSA%40mail.gmail.com?=
+utm_medium=3Demail&utm_source=3Dfooter>.
+
+
+--=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/=
+d5b68a7e-0eea-465d-95f5-9cb6557697d8%40achow101.com.
+