Re: need reason description for exclusion of UseCase v1

Hi Mountie,

This is the same "confusion" Dave highlighted regarding the word discover.
There are 4 steps that must be completed before we have a final selection
of payment scheme and instrument to begin processing a payment.

1. Registration: The user (over time) will register one or more payment
schemes and instruments that they have and wish to use to make payments.
They will configure how these must be used and set default parameters for
their use. My understanding is that the current proposal is for this
process to be IN SCOPE but not necessarily REQUIRED by the browsers
themselves. i.e. The most likely scenario is that the browser allows the
configuration of a "wallet" and the wallet itself is responsible for
managing the various schemes and instruments.

2. Request for Payment: The web application (of the payee/merchant) makes a
request to a browser API to perform a payment. In this request the payee
provides a list of payment schemes and instruments that they will accept
for payment (and possibly even different payment terms for each such as a
different amount and currency).

3. Discovery: This step is the one causing the confusion because I think it
is not clear who does the discovery. My understanding from the F2F is that
this will be done by the "wallet". The browser will pass the payment
request to the "wallet" and the wallet will use an algorithm to match the
supported schemes and instruments from the payee with the registered
schemes and instruments from the payer.

4. Selection: After discovery there should be a list of at least one
payment scheme and instrument that is both supported by the payee and
registered by the payer. If there are more than 1 then the user must be
prompted to select the one they wish to use or the user may have configured
the wallet to auto-select the one that will cost the least and then order
by preference.

Following these 4 steps we can now prompt the user to confirm the
transaction and then proceed.

Adrian

On 23 June 2015 at 08:18, Mountie Lee <mountie@paygate.net> wrote:

> Hi.
> I have a question for usecase v1
>
> Discovery at Selection of Payment Instruments (
> http://www.w3.org/TR/2015/WD-web-payments-use-cases-20150416/#selection-of-payment-instruments
> )
>
> I'm not sure who discover
> maybe user will select payment instrument across the multiple wallets.
> but who discover the wallets?
> by mercahnt(payee)?
>
> regards
> mountie
>
>
> On Mon, Jun 22, 2015 at 11:28 AM, Manu Sporny <msporny@digitalbazaar.com>
> wrote:
>
>> On 06/21/2015 12:08 PM, Mountie Lee wrote:
>> > I found it at
>> > https://www.w3.org/Payments/IG/wiki/Payment_Architecture_Priorities
>>
>> That link above was mostly an attempt at organizing the existing use
>> cases into versions. I wouldn't suggest that anyone take it as anything
>> more than an educated guess on how each use case we have today could be
>> organized into versions.
>>
>> This is the final list of use cases for version 1:
>>
>>
>> https://www.w3.org/Payments/IG/wiki/Main_Page/FTF_June2015/UseCasesForVersion1
>>
>> The only use case that was dropped from version 1 was the Credentials
>> use case, primarily because there wasn't a belief that it was critical
>> path for version 1.
>>
>> That said, the breakout session on use cases found that while
>> Credentials wasn't critical path for version 1, that a Credentials WG
>> should be created in parallel primarily due to  demand for a better way
>> of doing KYC/AML across the financial industry. I think the feedback
>> from the roundtable underscored this desire.
>>
>> The rest of the feedback will be integrated into the use case
>> descriptions this week. For each use case, the roadmap will clarify if
>> only a subset of a use case for version 1 is expected to be implemented
>> (electronic receipts, for example, is only supposed to have very minimal
>> support in version 1).
>>
>> Mountie, are you asking that we document /every/ use case that wasn't
>> selected for version 1, or just the use cases that were considered and
>> then removed for version 1?
>>
>> -- manu
>>
>> --
>> Manu Sporny (skype: msporny, twitter: manusporny, G+: +Manu Sporny)
>> Founder/CEO - Digital Bazaar, Inc.
>> blog: Web Payments: The Architect, the Sage, and the Moral Voice
>> https://manu.sporny.org/2015/payments-collaboration/
>>
>
>
>
> --
> Mountie Lee
>
> PayGate
> CTO, CISSP
> Tel : +82 2 2140 2700
> E-Mail : mountie@paygate.net
>
>