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 139987D for ; Mon, 30 Nov 2015 03:32:42 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.7.6 Received: from mail-qg0-f44.google.com (mail-qg0-f44.google.com [209.85.192.44]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 95DC6145 for ; Mon, 30 Nov 2015 03:32:41 +0000 (UTC) Received: by qgeb1 with SMTP id b1so110151777qge.1 for ; Sun, 29 Nov 2015 19:32:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-type; bh=tAladGMh11cYN0Vrn3/PRHZoeFInQZNcxnmKuuRJHKI=; b=njvYvtG1+kbpOUyMGCfDhe9Ywz4luwdTLOLijRL5/cnW922OweyMGFP/fI11cGjftf L6uEPzUDVLwTIZFl5gCH3JygPf9ok+s4Z1E8G1WJDRLk4ATpKoE8ExGq1CrTo5F6PG5y /Fd+bXrVxu/Ont0R7rif7lvhgGk7Vo+rpxbr691YeE+HwDGmVG2SO6h9uOSJHsFXwbGo L7ChzW9NVPslDwd+GWLhbDTL9xjPfWz0+cqrRJxbOJ3Gk0EO1nKHEQOUZyQsDVUhTiob guFWblUrbVsm2bBQuDgOefLGmd2WxlW9qLaUuojFKXx5BQBXQDrJj9isj0HLxk/SIrCr RoCA== X-Received: by 10.140.43.135 with SMTP id e7mr69498645qga.11.1448854360826; Sun, 29 Nov 2015 19:32:40 -0800 (PST) Received: from [10.172.1.6] ([209.95.50.102]) by smtp.gmail.com with ESMTPSA id s20sm14197533qki.31.2015.11.29.19.32.39 for (version=TLSv1/SSLv3 cipher=OTHER); Sun, 29 Nov 2015 19:32:40 -0800 (PST) To: bitcoin-dev@lists.linuxfoundation.org References: <20151117004218.GB6302@savin.petertodd.org> From: Chris X-Enigmail-Draft-Status: N1110 Message-ID: <565BC352.4080001@gmail.com> Date: Sun, 29 Nov 2015 22:32:34 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <20151117004218.GB6302@savin.petertodd.org> Content-Type: multipart/alternative; boundary="------------090103000300020906060408" X-Spam-Status: No, score=-2.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,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: Mon, 30 Nov 2015 06:58:25 +0000 Subject: Re: [bitcoin-dev] Opt-in Full Replace-By-Fee (Full-RBF) 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: Mon, 30 Nov 2015 03:32:42 -0000 This is a multi-part message in MIME format. --------------090103000300020906060408 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit On 11/16/2015 07:42 PM, Peter Todd via bitcoin-dev wrote: > Sequence is used for opting in as it is the only "free-form" field > available for that purpose. Opt-in per output was proposed as well by > Luke-Jr, however the CTxOut data structure simply doesn't contain any > extra fields to use for that purpose. What is wrong with using they same scheme as sighash_single? If input 0 has nSequence < maxint-1 then output 0 is replaceable. For fee bumps you would just stick the change in position zero and reduce the value. You get FFS functionality without the hassle of addition other inputs. --------------090103000300020906060408 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: 7bit On 11/16/2015 07:42 PM, Peter Todd via bitcoin-dev wrote:
Sequence is used for opting in as it is the only "free-form" field
available for that purpose. Opt-in per output was proposed as well by
Luke-Jr, however the CTxOut data structure simply doesn't contain any
extra fields to use for that purpose.
What is wrong with using they same scheme as sighash_single?

If input 0 has nSequence < maxint-1 then output 0 is replaceable.

For fee bumps you would just stick the change in position zero and reduce the value.

You get FFS functionality without the hassle of addition other inputs.

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