From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Z24iZ-0002my-79 for bitcoin-development@lists.sourceforge.net; Mon, 08 Jun 2015 21:36:27 +0000 Received-SPF: pass (sog-mx-4.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.148.111 as permitted sender) client-ip=62.13.148.111; envelope-from=pete@petertodd.org; helo=outmail148111.authsmtp.net; Received: from outmail148111.authsmtp.net ([62.13.148.111]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1Z24iX-0007A4-0m for bitcoin-development@lists.sourceforge.net; Mon, 08 Jun 2015 21:36:27 +0000 Received: from mail-c235.authsmtp.com (mail-c235.authsmtp.com [62.13.128.235]) by punt18.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t58LaHdf068913; Mon, 8 Jun 2015 22:36:17 +0100 (BST) Received: from muck (bas3-cooksville17-1176329630.dsl.bell.ca [70.29.93.158]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t58LaBr9073613 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Mon, 8 Jun 2015 22:36:14 +0100 (BST) Date: Mon, 8 Jun 2015 17:36:11 -0400 From: Peter Todd To: Danny Thorpe Message-ID: <20150608213611.GB19826@muck> References: <87k2vhfnx9.fsf@rustcorp.com.au> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="gatW/ieO32f1wygP" Content-Disposition: inline In-Reply-To: X-Server-Quench: 6482014c-0e26-11e5-b396-002590a15da7 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aQdMdgoUEkAaAgsB AmMbWVZeU1t7WGU7 bApPbwxDa0lQXgBi T01BRU1TWkFtCWBQ dFwXUh5xcQRFNn9w Zk9kEHZfVEZ6dEIu X04BF2sbZGY1bX1N U0leagNUcgZDfk5E bwQuUz1vNG8XDQg5 AwQ0PjZ0MThBJSBS WgQAK04nCXUxMBUJ DzsLGzIpHEYMQ20y KQQ7NhYVGkpZNVgu KUY9EVUCPxIICwtR fQlMBmdFPVAHXCMg EQJdW1V2 X-Authentic-SMTP: 61633532353630.1023:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 70.29.93.158/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Score: -1.5 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 SPF_PASS SPF: sender matches SPF record X-Headers-End: 1Z24iX-0007A4-0m Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] [RFC] Canonical input and output ordering in transactions X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jun 2015 21:36:27 -0000 --gatW/ieO32f1wygP Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Jun 08, 2015 at 02:25:40PM -0700, Danny Thorpe wrote: > FWIW, The Open Assets colored coin protocol (CoinPrism) places special > significance on the zeroth input and the position of the OP_RETURN colored > coin marker output to distinguish colored coin issuance outputs from > transfer outputs. Reordering the inputs or the outputs breaks the colored > coin representation. >=20 > Recommending sorting of the inputs and outputs as a best practice is fine > (and better than random, IMO), but not as part of IsStandard() or consens= us > rules. There are cases where the order of the inputs and outputs is > significant. Timestamping is another case where order matters: if you put the digest in the last vout you can use SHA256 midstate's to reduce the size of the timestamp proof. Anyway, there's no reason to rush re: changes to IsStandard() --=20 'peter'[:-1]@petertodd.org 0000000000000000127ab1d576dc851f374424f1269c4700ccaba2c42d97e778 --gatW/ieO32f1wygP Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJVdgrIXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAxMjdhYjFkNTc2ZGM4NTFmMzc0NDI0ZjEyNjljNDcwMGNj YWJhMmM0MmQ5N2U3NzgvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udzrkgf/ZorTEEarnrxYUQEGPEzbgzEH 49BN2NBAUBwSDO5kjwnr942mj2G+GOZKpnvrZs/WtKlYK3IO7r6QOb77AUphzcHB UeXd2oVkul4k+rZqOV2JAqcesRIWEWN8igOBftbPcA34j3WpPu9JKU0gYRH0FbpS FLUJaTgf1vrXRctdQhP0Wwu26ccCUCqUD98zvf/hLVloU/eBtI0pqpDDu8RIsSqS uPxnMVIYvzhwCle0lvsxUlEdpR5IrzDysZXgh9J9YrtyVqVc2Uzs9PnXRUhboFMh SJF3FjuVSNyQjIk6UE81FIDbMbXoYsXMf325+yPcrwpKW6Iy3UVd3dBOpZ9D0A== =5Pf8 -----END PGP SIGNATURE----- --gatW/ieO32f1wygP--