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 CAD4485 for ; Tue, 24 Nov 2015 05:58:49 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail148095.authsmtp.com (outmail148095.authsmtp.com [62.13.148.95]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 12192126 for ; Tue, 24 Nov 2015 05:58:48 +0000 (UTC) Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt23.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tAO5wkPR098518; Tue, 24 Nov 2015 05:58:46 GMT Received: from savin.petertodd.org (75-119-251-161.dsl.teksavvy.com [75.119.251.161]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tAO5wfCK028303 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Tue, 24 Nov 2015 05:58:43 GMT Date: Tue, 24 Nov 2015 00:58:40 -0500 From: Peter Todd To: Btc Drak Message-ID: <20151124055840.GA5942@savin.petertodd.org> References: <20151124043618.GA7999@muck> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="qDbXVdCdHGoSgWSk" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: 6b8c8af1-9270-11e5-829e-00151795d556 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aAdMdAYUFloCAgsB AmMbW1FeVVV7XWc7 bA9PbARUfEhLXhtr VklWR1pVCwQmRW1+ A1lIIWJydQ1FeH0+ YEFrWD5dDkwpfRcr Q1NdF2oGeGZhPWUC WEJRIh5UcAJPfxhM bwR6UXVDAzANdhEy HhM4ODE3eDlSNhEd aCA1cwJACX0GFTk6 S1UGECsiGQUKXSw1 MhgvMF8ADQ4dNUgp NxQ9EVcRMBJaEQBY BEwl X-Authentic-SMTP: 61633532353630.1037:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 75.119.251.161/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW 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 Subject: Re: [bitcoin-dev] BIP68: Second-level granularity doesn't make sense X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Nov 2015 05:58:49 -0000 --qDbXVdCdHGoSgWSk Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Nov 24, 2015 at 05:05:32AM +0000, Btc Drak wrote: > On Tue, Nov 24, 2015 at 4:36 AM, Peter Todd via bitcoin-dev < > bitcoin-dev@lists.linuxfoundation.org> wrote: >=20 > > The downside of BIP68 as written is users of by-height locktimes have 14 > > bits unused in nSequence, but by-time locktimes have just 5 bits unused. > > This presents an awkward situation if we add new meanings to nSequence > > if we ever need more than 5 bits. Yet as shown above, the extra > > granularity doesn't have a practical benefit. > > > > > > Recommendation: Change BIP68 to make by-time locks have the same number > > of bits as by-height locks, and multiply the by-time lock field by the > > block interval. > > >=20 > I think you might be referring to the old specification. I believe this w= as > brought up before and the specification was changed so the same number of > bits were used for by-time and by-height. Please see > https://github.com/bitcoin/bips/pull/245 >=20 > However, I am glad you came to the came conclusions independently because > "re-invention" often confirms good ideas :) Ha, that's awesome! Looks like we're pretty much on the same page re: granularity. --=20 'peter'[:-1]@petertodd.org 000000000000000003c0cf6b89d2a9b68a8cedbd3935962203c21663925c714b --qDbXVdCdHGoSgWSk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJWU/yJXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAwM2MwY2Y2Yjg5ZDJhOWI2OGE4Y2VkYmQzOTM1OTYyMjAz YzIxNjYzOTI1YzcxNGIvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQJIFAPaXwkftpAgf/W9OVEC27ZuOz8pd/EUInJ40l 6LJSDsqVVubifnClE5YyuAPhiduqg0VRqKUY2IlMp78q9z6WUJxx2Dk5CKtVC4w9 2w1mgG8N1vBQ01DRaQ8oaBcdjPHk4Xyoa3AXnQv6EgvYATJOv9EdHfJCvVTiq/+A bhr9vtMIt/gzb7LoHqLCXEw9hZdOnptikn0/N7Pmx3yfi7oXUcDXH9JgX/K0PVzg wrlDmJ3XoexqxwDYR2hgMu9vCsGLfqUg5j3dyUwSlq74Sxw6OixbIJ12u/PyaMpl i8VBrd4R0TCEJ2GxPNK0G7a97PvB9Kys2zNSu6MQUZP+jqm0t/6UCIGFKmY/Ug== =14i+ -----END PGP SIGNATURE----- --qDbXVdCdHGoSgWSk--