Received: from sog-mx-2.v43.ch3.sourceforge.com ([172.29.43.192] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WwVyJ-0004fL-Pt for bitcoin-development@lists.sourceforge.net; Mon, 16 Jun 2014 12:25:11 +0000 Received-SPF: pass (sog-mx-2.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.219.42 as permitted sender) client-ip=209.85.219.42; envelope-from=mh.in.england@gmail.com; helo=mail-oa0-f42.google.com; Received: from mail-oa0-f42.google.com ([209.85.219.42]) by sog-mx-2.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1WwVyI-00021t-2X for bitcoin-development@lists.sourceforge.net; Mon, 16 Jun 2014 12:25:11 +0000 Received: by mail-oa0-f42.google.com with SMTP id eb12so5754806oac.1 for ; Mon, 16 Jun 2014 05:25:04 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.60.63.205 with SMTP id i13mr19672502oes.8.1402921504603; Mon, 16 Jun 2014 05:25:04 -0700 (PDT) Sender: mh.in.england@gmail.com Received: by 10.76.71.162 with HTTP; Mon, 16 Jun 2014 05:25:04 -0700 (PDT) In-Reply-To: References: Date: Mon, 16 Jun 2014 14:25:04 +0200 X-Google-Sender-Auth: DDTjyilbtbCx3C10KhZfn-JdgDk Message-ID: From: Mike Hearn To: Lawrence Nahum Content-Type: multipart/alternative; boundary=001a11c1d89aee064404fbf31db8 X-Spam-Score: -0.5 (/) 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 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (mh.in.england[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_OBFUSCATE_05_10 BODY: Message is 5% to 10% HTML obfuscation 1.0 HTML_MESSAGE BODY: HTML included in message 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature X-Headers-End: 1WwVyI-00021t-2X Cc: Bitcoin Dev Subject: Re: [Bitcoin-development] instant confirmation via payment protocol backwards compatible proto buffer extension 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, 16 Jun 2014 12:25:11 -0000 --001a11c1d89aee064404fbf31db8 Content-Type: text/plain; charset=UTF-8 Oh yes the other thing we need to decide is how to extend BIP70. Protocol buffers have an extend keyword. But I'm not sure it's what we really want. IMHO a simpler solution is to have a single "living" version of the protobuf (where? in a new git repo?) which has all the fields defined by all the accepted BIPs in a single place. Otherwise the build process and so on for wallet implementors would get unnecessarily complicated for no real reason. Also if you wanted to pick a new number for fields, you'd end up having to read *all* BIPs to figure out what is available. Simpler seems better. If we do that then I suggest just using field number 8 or 9 or whatever rather than 1000. IMHO fields 1000+ should be for private extensions that are unlikely to collide with other users. --001a11c1d89aee064404fbf31db8 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Oh yes the other thing we need = to decide is how to extend BIP70.

Protocol buffers have an extend keyword. But I&= #39;m not sure it's what we really want. IMHO a simpler solution is to = have a single "living" version of the protobuf (where? in a new g= it repo?) which has all the fields defined by all the accepted BIPs in a si= ngle place. Otherwise the build process and so on for wallet implementors w= ould get unnecessarily complicated for no real reason. Also if you wanted t= o pick a new number for fields, you'd end up having to read all= =C2=A0BIPs to figure out what is available. Simpler seems better.

If we do th= at then I suggest just using field number 8 or 9 or whatever rather than 10= 00. IMHO fields 1000+ should be for private extensions that are unlikely to= collide with other users.
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