From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <rusty@ozlabs.org>
Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org
	[172.17.192.35])
	by mail.linuxfoundation.org (Postfix) with ESMTPS id 5710814F2
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Fri, 18 Sep 2015 23:24:40 +0000 (UTC)
X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6
Received: from ozlabs.org (ozlabs.org [103.22.144.67])
	by smtp1.linuxfoundation.org (Postfix) with ESMTPS id BD77E268
	for <bitcoin-dev@lists.linuxfoundation.org>;
	Fri, 18 Sep 2015 23:24:39 +0000 (UTC)
Received: by ozlabs.org (Postfix, from userid 1011)
	id 0139B140A98; Sat, 19 Sep 2015 09:24:36 +1000 (AEST)
From: Rusty Russell <rusty@rustcorp.com.au>
To: Jorge =?utf-8?Q?Tim=C3=B3n?= <jtimon@jtimon.cc>, Tier Nolan
	<tier.nolan@gmail.com>
In-Reply-To: <CABm2gDppFsTbh3JtdJkAkV_GzKFYAOLiEmtQPCgS9O6b7eWFuw@mail.gmail.com>
References: <87mvwqb132.fsf@rustcorp.com.au>
	<CAE-z3OWLteNyBWuYSkYLZNteOGjDch_fViOV2kpWCaZkXsbu4w@mail.gmail.com>
	<87r3lyjewl.fsf@rustcorp.com.au>
	<CABm2gDqh=Dv2Ygctg+jEt61N_nJDRBMqdZypSPtmfM2QrY4AYQ@mail.gmail.com>
	<CAE-z3OXATJ6HGKqU=vxc8k-yCMAMwXiWQJxvO3D_O256_ZODtw@mail.gmail.com>
	<CABm2gDppFsTbh3JtdJkAkV_GzKFYAOLiEmtQPCgS9O6b7eWFuw@mail.gmail.com>
User-Agent: Notmuch/0.17 (http://notmuchmail.org) Emacs/24.4.1
	(x86_64-pc-linux-gnu)
Date: Fri, 18 Sep 2015 07:30:27 +0930
Message-ID: <87eghwiu4k.fsf@rustcorp.com.au>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
X-Spam-Status: No, score=-2.9 required=5.0 tests=BAYES_00, DATE_IN_PAST_24_48, 
	RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD autolearn=ham version=3.3.1
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on
	smtp1.linux-foundation.org
Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] [BIP Proposal] Version bits with timeout and
	delay.
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
	<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Sep 2015 23:24:40 -0000

Jorge Tim=C3=B3n via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wr=
ites:
> I agree on using height vs time. Rusty, what do you mean by being easier
> for bip writers? How is writing "block x" any harder than writing "date y=
".

Three years from drafting is reasonable.  How many blocks is that?  Hmm,
better make it 6 years of blocks just in case we have a hash race.

Deployment speed is measured in months, not blocks.  It's hard enough to
guess without adding another variable.

Cheers,
Rusty.