Source Object

This object describes the nature and behavior of the entity that is the source of the bid request upstream from the exchange. The primary purpose of this object is to define post-auction or upstream decisioning when the exchange itself does not control the final decision.

Attribute	Triplelift Required	Type	Description
fd	no; recommended	integer	Entity responsible for the final impression sale decision, where 0 = exchange, 1 = upstream source
tid	no; recommended	string	Transaction ID that much be common across all participants in this bid request
pchain	no; recommended	string	Payment ID chain string containing embedded syntax described in the TAG Payment ID Protocol v1.0
ext	no	object	Placeholder for exchange-specific extensions to OpenRTB