Add SSP to the query parameter of the key value server. #987
Description
This proposal is for implementing a blocklist for SSPs.
Some SSPs have restrictions on ad categories.
There are three ways to check if an ad is included in the blocklist when generateBid.
- store the blocklist in IG.
- fetch the blocklist from the trusted server.
- include the blocklist in perBuyerSignal.
All of these make the blocklist public, which is not preferable.
If the query parameter contains the SSP name, we can only retrieve if the IG is included in the blocklist.