- From: Manu Sporny <msporny@digitalbazaar.com>
- Date: Tue, 29 Jul 2014 23:19:08 -0400
- To: public-webpayments@w3.org
On 07/22/2014 08:50 AM, Joseph Potvin wrote:
> RE: Use Case: A merchant advertises different details, such as price,
> for an offer of sale based on potential payment processor choice.
>
> I wish to ask if the "value-in-exchange benchmarking" issue I
> presented about in Paris is intended to be incorporated in this use
> case, or is benchmarking elsewhere and I haven't noticed?
The value-in-exchange benchmarking issue was deemed to be out of scope
for the first iteration (and is something that could be implemented by
payment processors w/o it being mandated via a specification). We don't
know if it's a good technical design to mandate it in the specification
because we can't really police it via technology. It's a policy
decision, not a technological one.
I've added the use case you mentioned back into the list for further
discussion:
> Use Case: Payee and payers negotiate secure price in an open market.
> They are free to choose all three essential attributes of the
> numeric quantity expressing a price (e.g. 10.99), namely: a
> unit-of-account (e.g. $ £ € ¥ etc.); a medium-of-exchange (e.g.
> debit card, credit card, web payment etc.); and, a value-in-exchange
> benchmark (e.g. WM Reuters Spot Exchange; Purchasing Power Parity;
> Commodity Index; etc.)
It's already agreed that we will support listing the unit-of-account,
and medium-of-exchange. I guess we could also support value-in-exchange
by providing an index URL along w/ the price of the good... so the way
one /could/ list items for sale is:
"payee": [{
"id": "http://example.com/articles/1#offer-payee",
"type": "Payee",
"currency": "USD",
*** "priceBenchmark": "https://reduters.com/spot-exchange-rates",
"destination": "https://payswarm.example.com/i/bob/accounts/primary",
"rate": "0.05",
"rateType": "FlatAmount",
"comment": "Payment for PaySwarm in Practice by Digital Bazaar."
}],
We'll discuss in more detail on tomorrows call.
Who sets the value-in-exchange benchmark? The payer or the payee?
-- manu
--
Manu Sporny (skype: msporny, twitter: manusporny, G+: +Manu Sporny)
Founder/CEO - Digital Bazaar, Inc.
blog: The Marathonic Dawn of Web Payments
http://manu.sporny.org/2014/dawn-of-web-payments/
Received on Wednesday, 30 July 2014 03:19:38 UTC