conversions4

common/proto/ecb.proto

@@ -274,6 +274,11 @@ message EcbConversionEvidence {
   // already_same_currency, since none of those were priced by the policy's
   // source itself -- a human entered them.
   optional string observation_source_id = 29;
+
+  // Exact immutable profile policy version selected for this conversion's
+  // accounting date. Absent only when no conversion policy was needed because
+  // determination_method is already_same_currency.
+  optional int64 rate_source_policy_id = 30;
 }
 
 message ListEcbConversionEvidenceResponse {