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 D7EA11045 for ; Wed, 30 Dec 2015 14:30:16 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail148108.authsmtp.net (outmail148108.authsmtp.net [62.13.148.108]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 2EF5813E for ; Wed, 30 Dec 2015 14:30:15 +0000 (UTC) Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt21.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tBUEUFhi073845; Wed, 30 Dec 2015 14:30:15 GMT Received: from muck ([24.114.27.145]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id tBUESbQQ012700 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 30 Dec 2015 14:30:11 GMT Date: Wed, 30 Dec 2015 06:28:37 -0800 From: Peter Todd To: Martijn Meijering Message-ID: <20151230142836.GA19507@muck> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="BXVAT5kNtrzKuDFl" Content-Disposition: inline In-Reply-To: X-Server-Quench: d61062e1-af01-11e5-829e-00151795d556 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR aAdMdQIUHFAXAgsB AmMbWlBeU117WGE7 aQ5PbARZfEhJQQRu VVdMSlVNFUssc3l0 ZUx/MxlzdQJGeDB1 YEZqECRdXUR8dxN8 Xx8CFWwbZGY1bX0X UkkNagNUcQZLeRZA PlV6Uj1vNG8XDSg5 AwQ0PjZ0MThBHWx8 REkMKEoWTEMGGCI1 WxEFG30oEwUvZh1q d0ZuI0VUFQ4KNUsu P1w7WhRw X-Authentic-SMTP: 61633532353630.1037:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 24.114.27.145/587 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@lists.linuxfoundation.org Subject: Re: [bitcoin-dev] An implementation of BIP102 as a softfork. 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: Wed, 30 Dec 2015 14:30:17 -0000 --BXVAT5kNtrzKuDFl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Dec 30, 2015 at 12:16:22PM +0100, Martijn Meijering via bitcoin-dev= wrote: > That looks very interesting. But is effectively blocking old clients from > seeing transactions really safe? After all, such transactions are still > confirmed on the new chain. A person might try to send a similar > transaction several times, perhaps with increasing fees in an attempt to > get it to confirm and end up paying someone several times. It's very dangerous to simply send multiple transactions in such a way that they don't double-spend each other; you have no good way of knowing for sure that you're seeing the longest block chain with software alone. Competently designed software with fee-bumping wouldn't allow that mistake to be made; the UX should make it clear that txs sent are still pending until confirmed or clearly double-spent. > Maybe we could require the tx version number to be increased as well so > transactions sent from old clients would never confirm? Perhaps your code > already includes this idea, I need to look at it more closely. That can mess up pre-signed transations, e.g. refunds. --=20 'peter'[:-1]@petertodd.org 00000000000000000831fc2554d9370aeba2701fff09980123d24a615eee7416 --BXVAT5kNtrzKuDFl Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- iQGrBAEBCACVBQJWg+oSXhSAAAAAABUAQGJsb2NraGFzaEBiaXRjb2luLm9yZzAw MDAwMDAwMDAwMDAwMDAwODMxZmMyNTU0ZDkzNzBhZWJhMjcwMWZmZjA5OTgwMTIz ZDI0YTYxNWVlZTc0MTYvFIAAAAAAFQARcGthLWFkZHJlc3NAZ251cGcub3JncGV0 ZUBwZXRlcnRvZC5vcmcACgkQwIXyHOf0udwQ6Af7B3XZNeyUtgslfaIkhu59S746 mO5ddXb+g1xiMX9nX+ol+1Xj83BdLCAa+JoFq/gYzvllrDGMNYnttDQ2MGF3G7z4 pE1C7TDoBUJ++CKWa5o1B4swqHCEQVFy7yUB5rWwFr8yEJTApxFXorjqoU89lhDK rMVrbnTLjQ88Dc61U+02W0I3EHdQah5/H3tbbbKGBiFQbfCM8fuxW/+FXIhCMvdX c+ccGkMQOK2JC/pIFzFbecNlI+kkL0gDFcWD/vZoKcL/vnyJ/Urhe4fuORmAsmWM SY8K6PIWTAZf5MN6NVx266KHmjOMFKTr3UWKxp7ymTuRVugtf0srw4UYIwgQEA== =UFiT -----END PGP SIGNATURE----- --BXVAT5kNtrzKuDFl--