On Fri, Jan 28, 2022 at 9:01 AM Stephen Mcgruer <smcgr...@chromium.org>
wrote:

> > Am I correct that currently Chromium allows the Payment Request API to
> be used unconditionally in iframes? Do you then intend to send another
> intent to change the behavior to require activation, after a suitable
> period and working with sites to migrate?
>
> Correct. This is Intent to Deprecate and Remove: Calling
> PaymentRequest.show without user activation
> <https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/xCW746n6XJI/m/rpqi3Ws2EAAJ>
> .
>

LOL. I feel like I might have LGTMed that one.


> We had hoped to land them simultaneously (as we have a good relationship
> with the primary user that does not currently have user-activation when
> calling show()), however our partner is having trouble with their
> migration and we may request to push the enforcement (aka the deprecation)
> back to M102. (TBD still; I expect to make the request on the deprecation
> thread in the next few days.)
>

SGTM!

LGTM3 for this intent (shipping the API).


>
> On Fri, 28 Jan 2022 at 11:55, Chris Harrelson <chris...@chromium.org>
> wrote:
>
>> I'm a bit confused about the bit regarding transitioning existing sites.
>> Am I correct that currently Chromium allows the Payment Request API to be
>> used unconditionally in iframes? Do you then intend to send another intent
>> to change the behavior to require activation, after a suitable period and
>> working with sites to migrate?
>>
>> Chris
>>
>> On Thu, Jan 27, 2022 at 11:13 PM Yoav Weiss <yoavwe...@chromium.org>
>> wrote:
>>
>>> LGTM2 % fixing the spec issue.
>>>
>>> On Thu, Jan 27, 2022 at 9:53 PM Mike Taylor <miketa...@chromium.org>
>>> wrote:
>>>
>>>> Appreciate the replies, Mustaq.
>>>>
>>>> This seems like a useful addition to the platform, thanks for working
>>>> on it. LGTM1.
>>>>
>>>> On 1/27/22 12:35 PM, Mustaq Ahmed wrote:
>>>>
>>>> Hi Mike:
>>>>
>>>> Appreciate your feedback.  My answers are inline.
>>>>
>>>> Mustaq
>>>>
>>>>
>>>> On Wed, Jan 26, 2022 at 6:03 PM Mike Taylor <miketa...@chromium.org>
>>>> wrote:
>>>>
>>>>> Hi Mustaq,
>>>>>
>>>>> On 1/25/22 4:45 PM, Mustaq Ahmed wrote:
>>>>>
>>>>> Contact emails
>>>>>
>>>>> mus...@chromium.org, smcgr...@chromium.org
>>>>> Explainer
>>>>>
>>>>> https://github.com/WICG/capability-delegation
>>>>> Specification
>>>>>
>>>>> https://wicg.github.io/capability-delegation/spec.html
>>>>> Design doc
>>>>>
>>>>>
>>>>> https://docs.google.com/document/d/1IYN0mVy7yi4Afnm2Y0uda0JH8L2KwLgaBqsMVLMYXtk/edit?usp=sharing
>>>>> Summary
>>>>>
>>>>> Capability delegation means allowing a frame to relinquish its ability
>>>>> to call a restricted API and transfer the ability to another (sub)frame it
>>>>> trusts.
>>>>>
>>>>> Can you expand more on the relinquishing aspect and how regaining the
>>>>> capability happens? I can't find any normative text in
>>>>> https://wicg.github.io/capability-delegation/spec.html that explains
>>>>> how it happens. Do we look for expired timestamps in
>>>>> DELEGATED_CAPABILITY_TIMESTAMPS["feature"] of all frames? Something else?
>>>>>
>>>>> (maybe I'm looking in the wrong place!)
>>>>>
>>>> You got it right: our proposal missed the normative text around the
>>>> relinquishing, yikes!  I opened this spec issue
>>>> <https://github.com/WICG/capability-delegation/issues/24>, we will
>>>> send out a PR to fix this when we get a chance.  In the meantime here is
>>>> what we wanted to mean: access to activation-gated APIs
>>>> <https://html.spec.whatwg.org/multipage/interaction.html#user-activation-gated-apis>
>>>>  is
>>>> lost from the sender frame through consumption, and the receiver frame
>>>> checks its own DELEGATED_CAPABILITY_TIMESTAMPS["feature"] only.
>>>>
>>>> If an app wants to delegate its ability to call a restricted JS
>>>>> capability (e.g. popups, fullscreen, etc) to a known+trusted third-party
>>>>> frame, the app would utilize a Capability Delegation API to "transfer" the
>>>>> ability to the target frame in a time-constrained manner (unlike static
>>>>> mechanisms like <iframe allow> attributes).
>>>>>
>>>>> What happens if the delegation is refused (or fails) by the browser
>>>>> for some reason? As a developer, how do I know that I shouldn't fire off a
>>>>> PaymentRequest that's going to fail? Do we signal anything in the message
>>>>> event, if not, should we?
>>>>>
>>>>> (From the PaymentRequest side, I guess I can handle the failure if
>>>>> PaymentRequest.show() is rejected.)
>>>>>
>>>> Yes, just trying PaymentRequest.show() works on the receiver side
>>>> today.  As we get more use-cases around delegation, we can explore
>>>> signaling on the received message event.  I would suggest starting a new
>>>> issue to discuss this.
>>>>
>>>> That's fair - I'll file an issue, but I don't consider this to be a
>>>> blocking concern.
>>>>
>>>>
>>>> As for error handling on the sender side, we have a few synchronous
>>>> failure conditions in our postMessage
>>>> <https://wicg.github.io/capability-delegation/spec.html#monkey-patch-to-html-tracking-delegation>
>>>>  algorithm
>>>> <https://wicg.github.io/capability-delegation/spec.html#monkey-patch-to-html-tracking-delegation>
>>>>  already,
>>>> can easily new ones as needed.  However, if you are thinking about an
>>>> asynchronous failure (e.g. detected later when the browser decided to run
>>>> the posted task), it seems like an existing problem with postMessage unless
>>>> we change it to return a Promise
>>>> <https://github.com/whatwg/html/issues/3458> (a separate problem).
>>>>
>>>>> Blink component
>>>>>
>>>>> Blink>Input
>>>>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EInput>
>>>>> TAG review
>>>>>
>>>>> https://github.com/w3ctag/design-reviews/issues/655
>>>>> TAG review status
>>>>>
>>>>> Approved subject to minor changes.
>>>>>
>>>>> (Work in progress, see
>>>>> https://github.com/WICG/capability-delegation/pull/23).
>>>>> Risks Interoperability
>>>>>
>>>>> Interop risk here like any new API: new use-cases relying on
>>>>> delegation will fail in a browser that hasn't implemented this feature.  
>>>>> In
>>>>> such a browser, the new API (postMessage() call with an additional
>>>>> option) will silently get ignored while preserving the legacy behavior.
>>>>> More precisely, the postMessage() call will be treated as if it was
>>>>> meant to send the message object only, and the delegated capability will
>>>>> behave in the target Window as if no delegation has taken place.
>>>>>
>>>>>
>>>>> Compatibility
>>>>>
>>>>> There is no compat risk because this is a new feature.
>>>>> External signals Gecko: Positive (
>>>>> https://github.com/mozilla/standards-positions/issues/565) WebKit: No
>>>>> signal Web developers: Positive (
>>>>> https://discourse.wicg.io/t/capability-delegation/4821/3)
>>>>> Debuggability
>>>>>
>>>>> Developers can test the delegated API by calling it from the console
>>>>> of postMessage-target Window.  Additionally, on the console of the
>>>>> sender Window, navigator.userActivation.isActive API can be utilized
>>>>> to check the consumption of user activation as a side-effect of 
>>>>> delegation.
>>>>> Ongoing technical constraints
>>>>>
>>>>> None.
>>>>> Will this feature be supported on all six Blink platforms (Windows,
>>>>> Mac, Linux, Chrome OS, Android, and Android WebView)?
>>>>>
>>>>> Yes
>>>>> Is this feature fully tested by web-platform-tests
>>>>> <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
>>>>> ?
>>>>>
>>>>> Work in progress:
>>>>> https://chromium-review.googlesource.com/c/chromium/src/+/3413851
>>>>> Flag name
>>>>>
>>>>> --enable-blink-features=CapabilityDelegationPaymentRequest
>>>>> Requires code in //chrome?
>>>>>
>>>>> False
>>>>> Tracking bug
>>>>>
>>>>> https://crbug.com/1130558
>>>>> Estimated milestone
>>>>>
>>>>> M100
>>>>> Link to entry on the Chrome Platform Status
>>>>>
>>>>> https://www.chromestatus.com/feature/5708770829139968
>>>>> Links to previous Intent discussions
>>>>>
>>>>> Intent to prototype:
>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/9CeLYndESPE/m/AhEttheMBQAJ
>>>>>
>>>>> Intent to Experiment:
>>>>> https://groups.google.com/a/chromium.org/g/blink-dev/c/i6pAWsjU7zg/m/UK0lGnKuAAAJ
>>>>>
>>>>>
>>>>>
>>>>> This intent message was generated by Chrome Platform Status
>>>>> <https://www.chromestatus.com/>
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>>>>> <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAB0cuO7vK4UUEzD%3DwJGnAdyTRxgRrmx7AgfoQjCndi91DF2hGA%40mail.gmail.com?utm_medium=email&utm_source=footer>
>>>>> .
>>>>>
>>>>>
>>>>>
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>>>
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