Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 9F9C51A7A for ; Thu, 24 Sep 2015 18:41:20 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from outmail149058.authsmtp.co.uk (outmail149058.authsmtp.co.uk [62.13.149.58]) by smtp1.linuxfoundation.org (Postfix) with ESMTP id 01166278 for ; Thu, 24 Sep 2015 18:41:19 +0000 (UTC) Received: from mail-c237.authsmtp.com (mail-c237.authsmtp.com [62.13.128.237]) by punt16.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t8OIfHhM019379; Thu, 24 Sep 2015 19:41:17 +0100 (BST) Received: from [26.99.72.14] ([172.56.26.52]) (authenticated bits=0) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id t8OIfAx9002383 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 24 Sep 2015 19:41:14 +0100 (BST) In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 From: Peter Todd Date: Thu, 24 Sep 2015 18:41:07 +0000 To: Suhas Daftuar , Suhas Daftuar via bitcoin-dev , Tier Nolan Message-ID: <10E4880B-1B3F-40AF-88DD-65D152533DFC@petertodd.org> X-Server-Quench: d6952e53-62eb-11e5-9f76-002590a135d3 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR bgdMdAYUC1AEAgsB AmMbWl1eVFx7WGU7 ag1TcwBbfEhIQQBo T01BRU1TWkFgfmVX d1YXUhlwdA1FNnZ4 YEQsCnZSWUYvcEVg REwBR3AHZDJldWlJ V0ZFdwNWdQpKLx5G bwR8GhFYa3VsNCMk FAgyOXU9MCtqYBd/ YzlFFUgVWUEQFzoJ DzYPAn1lBkADSyU+ JhArMEVWVF5LKg03 PEA6UF0VWwA8 X-Authentic-SMTP: 61633532353630.1024:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 172.56.26.52/587 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] [BIP Proposal] New "sendheaders" p2p message 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: Thu, 24 Sep 2015 18:41:20 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 24 September 2015 14:37:40 GMT-04:00, Suhas Daftuar via bitcoin-dev wrote: >On Thu, Sep 24, 2015 at 2:17 PM, Tier Nolan via bitcoin-dev < >bitcoin-dev@lists.linuxfoundation.org> wrote: > >> >> Is there actually a requirement for the new message? New nodes could >just >> unilaterally switch to sending headers and current nodes would be >> compatible. >> > >I don't believe that unilaterally switching to headers announcements >would >work for all network participants -- both for users running older >Bitcoin >Core versions (anything before 0.10, which I believe all ignore headers >messages) and for non-Bitcoin Core software that participates on the >network (which may ignore headers messages too, I'm not sure what all >is >out there). You can enable the behaviour based on advertised p2p network version. -----BEGIN PGP SIGNATURE----- iQE9BAEBCgAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJWBEO5 AAoJEMCF8hzn9Lncz4MH/3ztGWdFvMWWcwQsjIRH+eP6PH57WaEru1smmFYOmKrj djdiRVdxfChxRqP3adO21RUKKchjl8DNjrFJHPFz75FSM0cDcD0QAGAHilVdnICE LEIlTEoiIc0f1z9f/EJHSHPhiUXMnjpl/l7PYJFZV3Lt2Bl30yLsNnrp9qxjR30n 3nykZjyRad4JSavdTP6Evd3qaqwGXNUWsdObXNI+WPKlrw6hczlhFDKQ7RC1FPQU Rbgb21pavtqLUTwbBZGUisAAc94e2Gama1p3ioUFklbVtLTdw+FtxPgV/0ZS75OR V9pCXIbg9VM6QY4+9gYnP635+qCkqAJ4tBsYGmsT8yA= =cF4B -----END PGP SIGNATURE-----