Filter Multi-Format Requests (2711)

[pm-isha-bharti]

Implements 2711

If a multi-format request is received for a bidder in which openrtb2.multiformat-supported is false, the following algorithm will be implemented for each impression:

1. If the request contains a preferred type (ext.prebid.biddercontrols.BIDDER.prefmtype):
   • If the bidder supports the preferred type, other types are removed for that bidder.
   • If the bidder does not support the preferred type, this impression is not sent to the bidder and a warning is returned.
2. If the request does not contain a preferred type, and account config account.preferredmediatype.BIDDER contains a preferred type:
   • If the bidder supports the preferred type, other types are removed for that bidder.
   • If the bidder does not support the preferred type, this impression is not sent to the bidder and a warning is returned.
3. If preferred type is not present in the request or account config:
   • The request is forwarded as is to the bidder. [ This is w.r.t to java implementation]

If openrtb2.multiformat-supported is not defined for the bidder, then default value will be true always i.e each bidder explicitly supports multi-format requests unless defined false in the bidder info yaml.