From: Andreas Schildbach <andreas@schildbach•de>
To: bitcoin-development@lists•sourceforge.net
Subject: Re: [Bitcoin-development] Payment Protocol for Face-to-face Payments
Date: Tue, 01 Jul 2014 16:59:07 +0200 [thread overview]
Message-ID: <louibr$8gc$1@ger.gmane.org> (raw)
In-Reply-To: <CALDj+BZ8_YB0DHiaGZPq4MB-dvkRqJhBFazcfnrrPX4EvRxbeQ@mail.gmail.com>
Does r[]= really need to be encoded as r%5B1%5D= ? In this case, I'd
advocate for a simple array parameter name, like rs= ("plural" of r).
Length really does matter for QR codes.
I'm fine with either multiple r= params or exactly one r= plus zero to
many r[]= params. Although I think it is a violation of the (current)
spec to choke on more than one r= parameters, I admit that bitcoinj is
currently implemented that way. (We could however fix this in a
maintenance release.)
However, r= should also allow all other protocols, exactly like any of
the r[]= params. I don't think we should do a distinction here. Also
because of backwards compatibility to the status quo.
On 07/01/2014 03:03 PM, Alex Kotenko wrote:
> In my mind it's not like the client's phone is going all directions at
> the same time. There should be a priority method and fallback method(s).
> And I see p2p radio as priority, and web as fallback, and BIP21 in the
> end as always-working-default.
>
> So I'm keeping support for it all while want to be able to provide best
> user experience.
> Mike, a while ago in this thread you've described contactless cards
> user experience. I'm also using contactless cards often, and what I'm
> aiming at is creating same level of user experience for Bitcoin users.
>
> Encryption over bluetooth is a matter to worry about, and we will
> introduce that, but we need to sort out more low level problems first
> before coming into that stage.
>
>
> So, the backwards compatibility is a good issue Michael pointed out.
> While processing of multiple "r" parameters is indeed uncertain (since
> there is no RFC for that various implementations may behave
> differently), the array solution is somewhat better. The array parameter
> name is "r%5B1%5D=", i.e. it's not "r=", and we can add plain "r="
> alongside. And if particular implementation understands the array
> construct - it will use it, otherwise it will ignore the "r%5B1%5D=" and
> use only usual "r=".
>
> This doens't work though for cases where particular implementation
> understands array construct but doesn't work well with repeating
> parameters, since it will see two repeating "r" - an array and a string.
> I don't have a solution for that atm.
>
>
> If add completely new parameter to solve this we will need to make it an
> array straight away to address upcoming issues with accommodating other
> protocols.
> And then I would also modify existing BIP72 to strictly define "r=" as
> "http(s)" only parameter, while all other protocols (bluetooth, WiFi
> Direct, ultrasound, chirp etc) should go to the new array parameter.
>
>
>
>
>
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next prev parent reply other threads:[~2014-07-01 14:59 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-27 11:59 Andreas Schildbach
2014-01-27 13:11 ` Mike Hearn
2014-01-27 18:18 ` Andreas Schildbach
2014-01-27 18:34 ` Mike Hearn
2014-01-27 20:53 ` [Bitcoin-development] Experiment with linking payment requests via href Andreas Schildbach
2014-01-27 21:47 ` Mike Hearn
2014-01-27 17:11 ` [Bitcoin-development] Payment Protocol for Face-to-face Payments Jeremy Spilman
2014-01-27 17:39 ` Andreas Schildbach
2014-01-27 18:18 ` Jeremy Spilman
2014-01-27 20:34 ` Roy Badami
2014-01-29 14:57 ` Christophe Biocca
2014-01-30 10:46 ` Andreas Schildbach
2014-01-30 10:50 ` Mike Hearn
2014-02-07 23:15 ` Andreas Schildbach
2014-03-02 9:47 ` Andreas Schildbach
2014-03-02 11:50 ` Mike Hearn
2014-03-20 2:22 ` Alex Kotenko
2014-03-20 3:31 ` Jeff Garzik
2014-03-20 8:09 ` Andreas Schildbach
2014-03-20 10:36 ` Mike Hearn
2014-03-20 12:12 ` Adam Back
2014-03-20 12:20 ` Mike Hearn
2014-03-20 17:31 ` Jeff Garzik
2014-03-20 17:42 ` Alex Kotenko
2014-03-20 18:01 ` Jeff Garzik
2014-03-21 10:28 ` Andreas Schildbach
2014-03-21 13:59 ` Alex Kotenko
2014-03-22 16:35 ` Jeff Garzik
2014-03-22 16:45 ` Mike Hearn
2014-03-22 16:55 ` Mark Friedenbach
2014-03-22 17:24 ` Jeff Garzik
2014-03-22 17:30 ` Mike Hearn
2014-03-23 3:47 ` Alex Kotenko
2014-03-21 10:25 ` Andreas Schildbach
2014-03-21 10:59 ` Adam Back
2014-03-21 11:08 ` Mike Hearn
2014-03-21 11:33 ` Mike Hearn
2014-03-21 12:25 ` Adam Back
2014-03-21 13:07 ` Mike Hearn
2014-03-20 18:20 ` Alex Kotenko
2014-03-20 18:31 ` Mike Hearn
2014-03-20 18:50 ` Alex Kotenko
2014-03-20 21:52 ` Roy Badami
2014-03-20 23:02 ` Mike Hearn
2014-03-26 22:48 ` Roy Badami
2014-03-26 22:56 ` Mike Hearn
2014-03-26 23:20 ` Andreas Schildbach
2014-03-27 10:08 ` Mike Hearn
2014-03-27 13:31 ` vv01f
2014-06-30 19:26 ` Alex Kotenko
2014-07-01 8:18 ` Mike Hearn
2014-07-01 9:48 ` Andreas Schildbach
2014-07-01 10:42 ` Michael Wozniak
2014-07-01 13:03 ` Alex Kotenko
2014-07-01 14:59 ` Andreas Schildbach [this message]
2014-07-01 15:07 ` Michael Wozniak
2014-07-01 15:39 ` Andreas Schildbach
2014-07-01 17:18 ` Alex Kotenko
2014-07-01 17:59 ` Mike Hearn
2014-07-02 8:49 ` Alex Kotenko
2014-03-21 10:43 ` Andreas Schildbach
2014-03-20 8:08 ` Andreas Schildbach
2014-03-20 16:14 ` Alex Kotenko
2014-03-21 9:47 ` Andreas Schildbach
2014-03-21 13:54 ` Alex Kotenko
2014-03-21 14:51 ` Andreas Schildbach
2014-03-21 15:38 ` Alex Kotenko
2014-03-21 15:20 ` Andreas Schildbach
2014-03-21 15:24 ` Mike Hearn
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