Explainer

https://github.com/WICG/turtledove/blob/main/FLEDGE_browser_bidding_and_auction_API.md#device-orchestrated-multi-seller-auctions


https://github.com/WICG/turtledove/pull/1403

Specification

https://wicg.github.io/turtledove/#getInterestGroupAdAuctionData

https://github.com/WICG/turtledove/pull/1389

Summary

Add support for navigator.getInterestGroupAdAuctionData to return the
encrypted B&A request payload for multiple sellers in a single call. This
allows multiple sellers sharing a single piece of on-page JavaScript to
more efficiently run Protected Audience advertisement selection auctions.

Blink component

Blink>InterestGroups
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EInterestGroups%22>

TAG review

For Protected Audience Bidding and Auction Services:
https://github.com/w3ctag/design-reviews/issues/1009

For Protected Audience: https://github.com/w3ctag/design-reviews/issues/723

TAG review status

Completed for Protected Audience Bidding and Auction Services, declined.

Completed for Protected Audience, resolved unsatisfied.

RisksInteroperability and Compatibility

Optional new functionality that does not break existing use.

Gecko & WebKit: Negative
<https://github.com/mozilla/standards-positions/issues/770#issuecomment-2432124085>
from Mozilla for the parent proposal, Protected Audience Bidding and
Auction Services. No signal
<https://github.com/WebKit/standards-positions/issues/158#issuecomment-2432121278>
from Webkit on parent proposal, Protected Audience Bidding and Auction
Services.

Edge: Edge is running an Origin Trial of the Ad Selection API
<https://github.com/WICG/privacy-preserving-ads/blob/main/README.md> which
shares a Web API and services protocol with Protected Audience and will
also benefit from this extension.

Web developers: Requested here
<https://github.com/prebid/Prebid.js/issues/12456>

WebView application risks

Protected Audience not available in WebView

Debuggability

API is debuggable in DevTools - developers can step over the API call and
see the results.

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

It will be supported on all platforms that support Protected Audience, so
all but WebView.

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

Yes
<http://github.com/web-platform-tests/wpt/blob/master/fledge/tentative/get-interest-group-auction-data.https.window.js#L625>

Flag name on about://flags

None

Finch feature name

FledgeBiddingAndAuctionServerAPIMultiSeller

Requires code in //chrome?

False

Estimated milestones

Shipping on desktop

134

Shipping on Android

134


Anticipated spec changes

No anticipated spec changes.

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5167187989626880?gate=5069253138710528

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