Source.pchain

A payment ID chain string whose syntax comes from the TAG Payment ID Protocol 1.0, identifying the parties paid along the transaction. Added in 2.5 and recommended.

CurrentstringRecommendedSince 2.5

Field facts

Path: source.pchain
Object: Source
Type: string
Requirement: Recommended
Added: OpenRTB 2.5
Spec section: 3.2.2

How it is used

The string format belongs to the TAG protocol, not to OpenRTB, so OpenRTB parsers pass it through as opaque text. Buyers who want a machine-readable list of the sellers on a path read Source.schain instead, which became part of the core object in 2.6.

Common mistakes

Putting a SupplyChain object, or its JSON text, in pchain mixes two different mechanisms. The supply chain belongs in Source.schain.

Version history

Added in OpenRTB 2.5, and present in the latest snapshot. The table shows how each version's spec text types the field.

Versions	Type in the spec	Required	Deprecated
2.5 to 2.6-202606	string	Recommended	No

Related fields

Other Source fields

For a walkthrough of the whole object, read Supply chain (schain).