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 69478103D for ; Wed, 30 Dec 2015 11:16:24 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-vk0-f52.google.com (mail-vk0-f52.google.com [209.85.213.52]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 845DDA7 for ; Wed, 30 Dec 2015 11:16:23 +0000 (UTC) Received: by mail-vk0-f52.google.com with SMTP id a188so204237401vkc.0 for ; Wed, 30 Dec 2015 03:16:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mevs-nl.20150623.gappssmtp.com; s=20150623; h=mime-version:date:message-id:subject:from:to:content-type; bh=8cUbF62+IVdv1Yk9xpue3tlNfBkf2BdFyd+geYOf+Gs=; b=uFq0F/9NV6vt6Jy/G5ZEKC+hlo9fxV6m5fpRkli/uU85L1XIi+FE7UiOiqIQV22q6W x8+XDOi3wcnXsy62WAHsRKHdPcjnJMxzAcCVvQWycE8yjwkf4wghiHir6Xb8PG9ssxzx FTr8aUl7dOgP9ZtT7VFKIRR5xbvBGeZ45P1yo6Cl6sdjfmPtVPWsfrPGOZ93wKbVSRSp Bh2bRGTvE8Q/n58wQaljx1D+h5q/sqIAu9DShANsv5ebnl+VA3Yzn6Yt3KpFXYwEytqP OcWsmQxT4LghfcJt7aVUXpRaK97gP9Xo9HKb+s4TI6Ny/y/WuDrSJJiZZwQ6Gha/3T7m Nm9A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:date:message-id:subject:from:to :content-type; bh=8cUbF62+IVdv1Yk9xpue3tlNfBkf2BdFyd+geYOf+Gs=; b=Yc9WVPtWTzVNxU5tQRFu9yKYTn32SwtmDFaTgE7+ah7xOu8+31y+x9igWSIF7a9DN0 fODvsdtSFCiORwdKTeGf/qhoFpd3vzmpOvFirOJhyWa9LO69qMkCbiQczt4ByZTAH4EH vya4taocOHGK03Ud2Sx+hF+EYLvxCYO9HIKKBL8OqNLjgKvR5LVyw8UTbzg5t6TKVtVf koznkzTnCLw1dKAouKhIaQAz2AEg5nI2oiVbPWiRmf1IZg3R3KM1nsVzeQOjdSqlvBCy NivRiXRPx0gfke6XiN3MVgPTt4u15VHBX6ia4VUHCjHnqY65OQ+jZ7udusAr+Ljn4QM1 X3Jw== X-Gm-Message-State: ALoCoQnGCEg0Kbqh/VLca1+bc6Znd11emfWQ8Fl2VElWtAlZCp57lJbjcr1j0Fzq/JS3xar4E+qFoXzUizHOQ1JVeZmAEYuKpg== MIME-Version: 1.0 X-Received: by 10.31.44.77 with SMTP id s74mr40619591vks.4.1451474182091; Wed, 30 Dec 2015 03:16:22 -0800 (PST) Received: by 10.103.78.12 with HTTP; Wed, 30 Dec 2015 03:16:22 -0800 (PST) Date: Wed, 30 Dec 2015 12:16:22 +0100 Message-ID: From: Martijn Meijering To: bitcoin-dev@lists.linuxfoundation.org Content-Type: multipart/alternative; boundary=001a11c075a206847d05281bab3e X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HTML_MESSAGE,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 X-Mailman-Approved-At: Wed, 30 Dec 2015 14:12:58 +0000 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 11:16:24 -0000 --001a11c075a206847d05281bab3e Content-Type: text/plain; charset=UTF-8 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. 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. --001a11c075a206847d05281bab3e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
That looks very interesting. But is effectively block= ing old clients=20 from seeing transactions really safe? After all, such transactions are=20 still confirmed on the new chain. A person might try to send a similar=20 transaction several times, perhaps with increasing fees in an attempt to get it to confirm and end up paying someone several times.

Ma= ybe we could require the tx version number to be increased as well so trans= actions sent from old clients would never confirm? Perhaps your code alread= y includes this idea, I need to look at it more closely.
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