From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 6D326279 for ; Mon, 14 Nov 2016 18:47:38 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-pg0-f50.google.com (mail-pg0-f50.google.com [74.125.83.50]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 6A20FA1 for ; Mon, 14 Nov 2016 18:47:37 +0000 (UTC) Received: by mail-pg0-f50.google.com with SMTP id f188so56760091pgc.3 for ; Mon, 14 Nov 2016 10:47:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=voskuil-org.20150623.gappssmtp.com; s=20150623; h=from:content-transfer-encoding:mime-version:date:subject:message-id :references:in-reply-to:to; bh=x1AVxfShLqv/PD76TIP+gcQAM6Go844wmfz1pDZW0ps=; b=i7FhpR/IBN8VYaq7D/C7p21NRM+PqDkeyEpiBCa/v1zpTzMhIwHhLm54yWBsQqpqMd Wsj2FLze5Vo8JhXOz78FPvkq13O9AhuEB9Yj+urGAVutgw8x+TEgfUeXIxH01COB+DKn LA80i8Pz4yoHJTpMmBAo4r/q0T+zwruuMY86ewGOK7fKmblbEo8R7nRJzeAqze1niAMp 1Nb/BH679YVN/WNfp5xXqeoLXxUi/f78PCutndJfZFjaYj5bjA3/9ew04hiji6tuUAUP WZXDeYcjo9EGcprsRVlFYbYD2YRrr1S7YWh2peBIHgh2Z7hzrv4SkLu/sd5jVylyHpiT d5/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:content-transfer-encoding:mime-version:date :subject:message-id:references:in-reply-to:to; bh=x1AVxfShLqv/PD76TIP+gcQAM6Go844wmfz1pDZW0ps=; b=B0sLYVlkzcZv0bwuu5kQn0v5dPJzcX/IsDsisrl2EysuXm4g2GW+wDLE8drBOVNX5+ nd1n1FHOjCtLkMGtFr2Hp75smYZr9Z83H2t5q97NE70a2EMjKQ5Yysq/tfSI2mzDWVi8 vc9it8H+hskQzu0NoBkv+3kYsTfhASynMpfcOQGiNFr3RujFBVWsIM/6ghmEvQgKBH78 U3OoKljdXJsMx03bjNPl6MqYJxp7O/v4LKJsaaXYpIu7LKChnsJHogo1lR8Ays/jV/ia mAipqHXMkpQ+WzQ69v+zDE0FHJjnrnjDhPS8E6c0pA2b2GhQHCaA8x+14qDf5T1PKmgh J6ug== X-Gm-Message-State: ABUngvd1G/Qxtqmpe3FaSCguemJrSLet0BSHADpcGNSIWFnaCAS1i3FHZzWi/lsa5SvS/g== X-Received: by 10.98.15.5 with SMTP id x5mr38414850pfi.140.1479149257061; Mon, 14 Nov 2016 10:47:37 -0800 (PST) Received: from [10.116.39.181] (mobile-166-176-185-48.mycingular.net. [166.176.185.48]) by smtp.gmail.com with ESMTPSA id d1sm36916975pfb.76.2016.11.14.10.47.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 14 Nov 2016 10:47:36 -0800 (PST) From: Eric Voskuil Content-Type: multipart/alternative; boundary=Apple-Mail-A88D0DA1-A6D3-44A6-82E1-B1F1AB9ECAAF Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Date: Mon, 14 Nov 2016 10:47:35 -0800 Message-Id: References: In-Reply-To: To: Suhas Daftuar , Bitcoin Protocol Discussion X-Mailer: iPhone Mail (14B100) X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HTML_MESSAGE,MIME_QP_LONG_LINE autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org X-Mailman-Approved-At: Mon, 14 Nov 2016 18:49:09 +0000 Subject: Re: [bitcoin-dev] [BIP Proposal] Buried Deployments X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Protocol Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Nov 2016 18:47:38 -0000 --Apple-Mail-A88D0DA1-A6D3-44A6-82E1-B1F1AB9ECAAF Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable NACK Horrible precedent (hardcoding rule changes based on the assumption that lar= ge forks indicate a catastrophic failure), extremely poor process (already s= hipped, now the discussion), and not even a material performance optimizatio= n (the checks are avoidable once activated until a sufficiently deep reorg d= eactivates them). e > On Nov 14, 2016, at 10:17 AM, Suhas Daftuar via bitcoin-dev wrote: >=20 > Hi, >=20 > Recently Bitcoin Core merged a simplification to the consensus rules surro= unding deployment of BIPs 34, 66, and 65 (https://github.com/bitcoin/bitcoin= /pull/8391), and though the change is a minor one, I thought it was worth do= cumenting the rationale in a BIP for posterity. >=20 > Here's the abstract: >=20 > Prior soft forks (BIP 34, BIP 65, and BIP 66) were activated via miner sig= naling in block version numbers. Now that the chain has long since passed th= e blocks at which those consensus rules have triggered, we can (as a simplif= ication and optimization) replace the trigger mechanism by caching the block= heights at which those consensus rules became enforced. >=20 > The full draft can be found here:=20 >=20 > https://github.com/sdaftuar/bips/blob/buried-deployments/bip-buried-deploy= ments.mediawiki > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev --Apple-Mail-A88D0DA1-A6D3-44A6-82E1-B1F1AB9ECAAF Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
NACK

Horrible precedent (hardcoding rule changes based on the assumption that l= arge forks indicate a catastrophic failure), extremely poor process (already= shipped, now the discussion), and not even a material performance optimizat= ion (the checks are avoidable once activated until a sufficiently deep reorg= deactivates them).

e

On Nov 14, 2016= , at 10:17 AM, Suhas Daftuar via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> w= rote:

Hi,
<= br>
Recently Bitcoin Core merged a simplification to the consensus= rules surrounding deployment of BIPs 34, 66, and 65 (https://github.com/bitcoin/bitcoin/pull/8= 391), and though the change is a minor one, I thought it was worth docum= enting the rationale in a BIP for posterity.

Here's= the abstract:

Prior soft forks (BIP 34, BIP 65, and= BIP 66) were activated via miner signaling in block version numbers. Now th= at the chain has long since passed the blocks at which those consensus rules= have triggered, we can (as a simplification and optimization) replace the t= rigger mechanism by caching the block heights at which those consensus rules= became enforced.

The full draft= can be found here: 

____________________= ___________________________
bitcoin-dev mailing list<= br>bitcoin-de= v@lists.linuxfoundation.org
https://lists.linuxfoundation= .org/mailman/listinfo/bitcoin-dev
= --Apple-Mail-A88D0DA1-A6D3-44A6-82E1-B1F1AB9ECAAF--