Missing fields in RTB protobuf for FLEDGE

[arouzaud]

Hello,
When looking at the official protobuf, I see the new enum field auction_environment, which enables interest group bidding on the browser.
However, in the BidResponse, there is no field to be filled so we can indicate that we want to participate in the on-device auction. In the previously shared doc, such a field was called interest_group_bidding, but it is not in the current protobuf.
Could you clarify how a buyer should respond to participate in the FLEDGE auction?

[timphsieh-google]

Early Google Authorized Buyers protocol changes related to FLEDGE are available to those RTB partners who have expressed interest in FLEDGE Origin Trials testing. Buyers can express interest via this form. Our team at Google will then work with the interest buyers to enable early testing of FLEDGE on inventory available to Authorized Buyers.