On 11/5/24 3:33 PM, 'Akash Nadan' via blink-dev wrote:
Contact emails

akashna...@google.com <mailto:akashna...@google.com>, lin...@chromium.org <mailto:lin...@chromium.org>, johni...@chromium.org <mailto:johni...@chromium.org>


Explainer

Attribution Reporting with event-level reports <https://github.com/WICG/attribution-reporting-api/blob/main/EVENT.md>

Attribution Reporting API with Aggregatable Reports <https://github.com/WICG/attribution-reporting-api/blob/main/AGGREGATE.md>

Aggregation Service for the Attribution Reporting API <https://github.com/WICG/attribution-reporting-api/blob/main/AGGREGATION_SERVICE_TEE.md>


Specification

https://wicg.github.io/attribution-reporting-api/ <https://wicg.github.io/attribution-reporting-api/>


Blink component

Internals > AttributionReporting <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EAttributionReporting>


TAG review

Still under review <https://github.com/w3ctag/design-reviews/issues/724>under the original I2S for the Attribution Reporting API


TAG review status

Pending

This should be updated to "declined" (as well as the ar_debug intent), at least in prose (seems chromestatus doesn't support that particular resolution).

Summary

We are landing the following change to the Attribution Reporting API focused on:

 *

    Making it easier to predefine contribution budget allocation for
    aggregate reports


This change is based on API caller feedback and the need for more control over the contribution budget allocation.


Currently the API has a concept of “L1 contribution budget.” This budget limits the total amount of information that can be attributed to any single ad impression (i.e. an ad click or view). The current L1 contribution budget is 65,536 and API callers can use this budget across various conversion events based on their own allocation choice.


This change makes it easier for API callers to pre-allocate how much of the L1 contribution budget they would like to allow for measuring different types of events. With this change API callers can specify the maximum amount of L1 contribution budget they would like to allow for any given type of conversion event, directly addressing API caller feedback.


Explainer/Spec changes

1.

    Explainer & Spec:
    https://github.com/WICG/attribution-reporting-api/pull/1422
    <https://github.com/WICG/attribution-reporting-api/pull/1422>

Reading diffs isn't a great experience for reviewing - could you please put together a minimal explainer or provide hyperlinks to the spec and explainer bits that have landed? That would be great for any future intents as well.

Risks
Interoperability and Compatibility

This is a fully backwards compatible change and an optional feature that requires API callers to set new fields in order to use the feature. This feature does not break any pre-existing API or web functionality.


Gecko: No signal (Original request: https://github.com/mozilla/standards-positions/issues/791 <https://github.com/mozilla/standards-positions/issues/791>)


WebKit: No signal (Original request: https://github.com/WebKit/standards-positions/issues/180 <https://github.com/WebKit/standards-positions/issues/180>)



WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications?

No


Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?

The attribution reporting feature will be supported on all platforms with the exception of Android WebView


Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?

No, currently the behavior around aggregatable named budgets is not covered in WPT due to difficulty of adding significant coverage for the feature because of API-mandated delays and noise. However, the feature is covered by comprehensive integration tests (commonly referred to as “interop tests”) that are also reusable by other implementations.


Estimated milestones

This feature is anticipated to ship as part of Chrome 132 <https://chromiumdash.appspot.com/schedule>.


Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5325966648541184 <https://chromestatus.com/feature/5325966648541184>


Links to previous Intent discussions

Previous I2S:

Intent to Ship: Attribution Reporting API <https://groups.google.com/a/chromium.org/g/blink-dev/c/2Rmj5V6FSaY>

Intent to Ship: Attribution Reporting features M117 <https://groups.google.com/a/chromium.org/g/blink-dev/c/nWF61c8xu-M/m/uMmH1ewcAQAJ>

Intent to Ship: Attribution Reporting features M118 <https://groups.google.com/a/chromium.org/g/blink-dev/c/Mh-mJiyJZFk/m/HlgzpphYBQAJ>

Intent to Ship: Attribution Reporting features M119 <https://groups.google.com/a/chromium.org/g/blink-dev/c/6e44SBtEtcQ>

Intent to Ship: Attribution Reporting features M120 <https://groups.google.com/a/chromium.org/g/blink-dev/c/jSk3xpNPzGQ/m/VZPsdYgGCAAJ>

Intent to Ship: Attribution Reporting features M121 <https://groups.google.com/a/chromium.org/g/blink-dev/c/g9KiC6Rg_mA/m/V679WcWuAQAJ>

Intent to Ship: Attribution Reporting features M123 <https://groups.google.com/a/chromium.org/g/blink-dev/c/NE7VGke1Bjc/m/bIX00t4CAAAJ>

Intent to Ship: Attribution Reporting features M124 <https://groups.google.com/a/chromium.org/g/blink-dev/c/aregp1li6xk/m/IhBB2z8tBQAJ>

Intent to Ship: Attribution Reporting features M125 <https://groups.google.com/a/chromium.org/g/blink-dev/c/9UyhI6SRyxM/m/zgWWckgWAQAJ>

Intent to Ship: Attribution Reporting features M126 <https://groups.google.com/a/chromium.org/g/blink-dev/c/7UQR2lPn5KE/m/q_kL6ZiJDgAJ>

Intent to Ship: Attribution Reporting features M127 <https://groups.google.com/a/chromium.org/g/blink-dev/c/LAgnyPsJyJg?pli=1>

Intent to Ship: Attribution Reporting features M128 (1) <https://groups.google.com/a/chromium.org/g/blink-dev/c/qlsv7fn0zRE/m/SK8upePCCAAJ>

Intent to Ship: Attribution Reporting features M128 (2) <https://groups.google.com/a/chromium.org/g/blink-dev/c/VKGn41wMYlg/m/VsNXktqvCAAJ>

Intent to Ship: Attribution Reporting feature M130 <https://groups.google.com/a/chromium.org/g/blink-dev/c/-K2xDYuvmmA/m/Fhp564I7AgAJ>


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