Re: User Consent and Addresses

On 5/10/16 11:02, Andre Lyver wrote:
>
> Agree with Adrian H-B.
>
> This behaviour is crucial to the checkout flow for merchants (and 
> especially Shopify). I think the fundamental piece that we are 
> forgetting is the fact that the final amount is going to change based 
> on a shipping address or shipping option change. This was the reason 
> for including the shippingoptionchange and shippingaddresschange 
> Events and their associated event handlers it in the Payment Request API.
> https://w3c.github.io/browser-payment-api/specs/paymentrequest.html#shipping-address-changed-algorithm.
>
> For example, a change of shipping address by the payer can invalidate 
> the shipping method selected (e.g. a change country from Canada to 
> U.S. may mean that CanadaPost is no longer available). This means that 
> a different shipping option will need to be selected, and as a result, 
> the final transaction amount will need to be updated (via 
> PaymentRequestUpdateEvent) _prior_ to proceeding with the actual payment.

That all sounds correct. It also sounds like a pretty compelling set of 
arguments for collecting the address and shipping method prior to 
initiating the payment flow.

-- 
Adam Roach
Principal Platform Engineer
Office of the CTO