diff options
| author | Thomas Voegtlin <thomasv@electrum.org> | 2015-07-21 16:58:39 +0200 |
|---|---|---|
| committer | bitcoindev <bitcoindev@gnusha.org> | 2015-07-21 14:58:45 +0000 |
| commit | 70cfb3b79dea1136e1ee98bf457721991dbd27f1 (patch) | |
| tree | 2eab74a77c288992bff21a15eb4ca61088c43a6f | |
| parent | c5e497bc8a4d97999fe97ed4aa0f6c2752910e3a (diff) | |
| download | pi-bitcoindev-70cfb3b79dea1136e1ee98bf457721991dbd27f1.tar.gz pi-bitcoindev-70cfb3b79dea1136e1ee98bf457721991dbd27f1.zip | |
Re: [bitcoin-dev] QR code alternatives (was: Proposal: extend bip70 with OpenAlias)
| -rw-r--r-- | be/95c99dcbfeeea9457bb8ad48c31583e5e40a9a | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/be/95c99dcbfeeea9457bb8ad48c31583e5e40a9a b/be/95c99dcbfeeea9457bb8ad48c31583e5e40a9a new file mode 100644 index 000000000..6277c15c4 --- /dev/null +++ b/be/95c99dcbfeeea9457bb8ad48c31583e5e40a9a @@ -0,0 +1,98 @@ +Return-Path: <thomasv@electrum.org> +Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org + [172.17.192.35]) + by mail.linuxfoundation.org (Postfix) with ESMTPS id 370FB482 + for <bitcoin-dev@lists.linuxfoundation.org>; + Tue, 21 Jul 2015 14:58:45 +0000 (UTC) +X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 +Received: from relay5-d.mail.gandi.net (relay5-d.mail.gandi.net + [217.70.183.197]) + by smtp1.linuxfoundation.org (Postfix) with ESMTPS id BE555165 + for <bitcoin-dev@lists.linuxfoundation.org>; + Tue, 21 Jul 2015 14:58:44 +0000 (UTC) +Received: from mfilter47-d.gandi.net (mfilter47-d.gandi.net [217.70.178.178]) + by relay5-d.mail.gandi.net (Postfix) with ESMTP id ACA4741C064 + for <bitcoin-dev@lists.linuxfoundation.org>; + Tue, 21 Jul 2015 16:58:42 +0200 (CEST) +X-Virus-Scanned: Debian amavisd-new at mfilter47-d.gandi.net +Received: from relay5-d.mail.gandi.net ([IPv6:::ffff:217.70.183.197]) + by mfilter47-d.gandi.net (mfilter47-d.gandi.net [::ffff:10.0.15.180]) + (amavisd-new, port 10024) with ESMTP id FaL38MeDfj7P + for <bitcoin-dev@lists.linuxfoundation.org>; + Tue, 21 Jul 2015 16:58:41 +0200 (CEST) +X-Originating-IP: 85.180.203.77 +Received: from [192.168.1.3] (x55b4cb4d.dyn.telefonica.de [85.180.203.77]) + (Authenticated sender: thomasv@electrum.org) + by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 5084D41C08A + for <bitcoin-dev@lists.linuxfoundation.org>; + Tue, 21 Jul 2015 16:58:40 +0200 (CEST) +Message-ID: <55AE5E1F.4050609@electrum.org> +Date: Tue, 21 Jul 2015 16:58:39 +0200 +From: Thomas Voegtlin <thomasv@electrum.org> +User-Agent: Mozilla/5.0 (X11; Linux x86_64; + rv:31.0) Gecko/20100101 Thunderbird/31.7.0 +MIME-Version: 1.0 +To: bitcoin-dev@lists.linuxfoundation.org +References: <CA+w+GKRRfT=8xALsVMqEUAZWzd87Lf4HqFPuDigatY+nHzafQQ@mail.gmail.com> +In-Reply-To: <CA+w+GKRRfT=8xALsVMqEUAZWzd87Lf4HqFPuDigatY+nHzafQQ@mail.gmail.com> +Content-Type: text/plain; charset=utf-8 +Content-Transfer-Encoding: quoted-printable +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 +Subject: Re: [bitcoin-dev] QR code alternatives (was: Proposal: extend bip70 + with OpenAlias) +X-BeenThere: bitcoin-dev@lists.linuxfoundation.org +X-Mailman-Version: 2.1.12 +Precedence: list +List-Id: Bitcoin Development Discussion <bitcoin-dev.lists.linuxfoundation.org> +List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe> +List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/> +List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org> +List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help> +List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>, + <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe> +X-List-Received-Date: Tue, 21 Jul 2015 14:58:45 -0000 + + + +Le 20/07/2015 16:40, Mike Hearn a =C3=A9crit : +>=20 +> If we accept a single payment address i.e. no clever tricks around merg= +e +> avoidance, such a QR code could look like this: +>=20 +> bitcoin:1aBcD1234....?x=3Dserialized_payment_request +>=20 +> However this requires text mode and wastes bytes at the front for the U= +RI +> type. +>=20 + +It is possible to be both backward-compatible and to avoid wasting space +in URIs, if we simply assume that the payment request is a single +standard output + amount (that scenario will probably cover 99% of the +cases, and the few other cases may not need QR codes). We generate a +serialized bip70 PR from the parameters found in the URI, sign that +string, and add the signature to the URI. + +Example: + +bitcoin:1H14AiSc4PqkK9VTmeutZU3edSy3HS5HL8?amount=3D1&message=3Dhere%20is= +%20a%20test&time=3D1437489571&exp=3D604800&name=3Decdsa.net&sig=3D3Quot6m= +2RsR43NgV8VQQx3Ngf5u8wZY18mu523x3ViLrA3WLwSoQum2Znw3gRsTgfADpHuEiyyjnpxCL= +KWrkR4RQM + +'time' is the timestamp of the request +'exp' is the duration of validity, 1 week here +(it saves a few bits to express it that way) + +'name' is the domain name of the signer +'sig' is the signature + +The QR code derived from that URI is perfectly scannable with a phone. + + + |