openrtb.schain.node.identifier_empty
What it means
A SupplyChain node carries an empty string for asi or sid. The pair is the node's identity: the advertising system's domain and the seller's account id within it. Empty strings satisfy a schema check while identifying nothing.
Why it matters
An unidentifiable node cannot be cross-checked against sellers.json, and one broken node poisons the whole chain's verification. Buyers with supply-path policies treat an unverifiable chain the same as a suspicious one.
How to fix it
Populate asi with the system's canonical domain and sid with the seller id exactly as it appears in that system's sellers.json. If a value is unavailable at build time, fail the node rather than emitting an empty placeholder.
Check your payload
Paste a bid request or response into the tester to see whether this code fires against it, or gate on the id in CI with the CLI: the id is stable, wording is not.
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