holderName is now required

What changed

Partial payloads are rejected.

Affects DirectDebitAuDetails reachable from 1 operation.

Who is affected

Code that sends Adyen's DirectDebitAuDetails objects, used by 1 Adyen operation.

Before and after

Code that breaks

await client.post("/…", {
  // …
  holderName: /* now required */,
});

Based on Adyen’s published API specification. How severity is decided.