Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1WTVsa-0001fW-Sl for bitcoin-development@lists.sourceforge.net; Fri, 28 Mar 2014 12:27:24 +0000 Received-SPF: pass (sog-mx-3.v43.ch3.sourceforge.com: domain of gmail.com designates 209.85.219.46 as permitted sender) client-ip=209.85.219.46; envelope-from=mh.in.england@gmail.com; helo=mail-oa0-f46.google.com; Received: from mail-oa0-f46.google.com ([209.85.219.46]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:RC4-SHA:128) (Exim 4.76) id 1WTVsa-0002fK-3z for bitcoin-development@lists.sourceforge.net; Fri, 28 Mar 2014 12:27:24 +0000 Received: by mail-oa0-f46.google.com with SMTP id i7so5868043oag.5 for ; Fri, 28 Mar 2014 05:27:18 -0700 (PDT) MIME-Version: 1.0 X-Received: by 10.60.44.42 with SMTP id b10mr85310oem.70.1396009638654; Fri, 28 Mar 2014 05:27:18 -0700 (PDT) Sender: mh.in.england@gmail.com Received: by 10.76.71.231 with HTTP; Fri, 28 Mar 2014 05:27:18 -0700 (PDT) In-Reply-To: <48ED312A-A1F9-4081-9718-04DD45804313@bitsofproof.com> References: <122FC5AD-2117-4CAF-817F-45B00F57D549@bitsofproof.com> <48ED312A-A1F9-4081-9718-04DD45804313@bitsofproof.com> Date: Fri, 28 Mar 2014 13:27:18 +0100 X-Google-Sender-Auth: 8-r5ujEzuUR8FmXbcCqzswdGRFE Message-ID: From: Mike Hearn To: Tamas Blummer Content-Type: multipart/alternative; boundary=001a11c30a049d7a4704f5a9d2a3 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 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: 1WTVsa-0002fK-3z Cc: Bitcoin Dev , Andreas Schildbach Subject: Re: [Bitcoin-development] BIP 70 refund field 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: Fri, 28 Mar 2014 12:27:25 -0000 --001a11c30a049d7a4704f5a9d2a3 Content-Type: text/plain; charset=UTF-8 > > It is not more effort than an auto remembered call-in phone number. You > delete if you do not care. The difference however is that it would be a > clean protocol for repeated payments in both directions for whatever > reason, where "refund" is and "payment" are not special compared to "1st > installment", "overpayed back" or "tip" or whatever extra charge arises > later. > I think that'd be too abstract. The purpose of the refund field is that so if/when you receive a payment there, the wallet UI can do something intelligent, like show you in your transactions list that a certain payment was refunded using language the user will understand. If it's modelled at the protocol level without that then it makes producing good UI's harder. --001a11c30a049d7a4704f5a9d2a3 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
It= is not more effort than an auto remembered call-in phone number. You delet= e if you do not care. The difference however is that it would be a clean pr= otocol for repeated payments in both directions for whatever reason, where = "refund" is and "payment" are not special compared to &= quot;1st installment", "overpayed back" or "tip" = =C2=A0or whatever extra charge arises later.

I think that'd be too abst= ract. The purpose of the refund field is that so if/when you receive a paym= ent there, the wallet UI can do something intelligent, like show you in you= r transactions list that a certain payment was refunded using language the = user will understand. If it's modelled at the protocol level without th= at then it makes producing good UI's harder.
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