New GetCdrID method

utils/cgrevent.go

@@ -110,6 +110,15 @@ func (cgrEv *CGREvent) AsDataProvider() (ev MapStorage) {
 	}
 }
 
+func (cgrEv *CGREvent) GetCDRUniqueID() string {
+	if chargeId, ok := cgrEv.APIOpts[MetaChargeID]; ok {
+		return IfaceAsString(chargeId)
+	} else if cgrId, ok := cgrEv.Event[CGRID]; ok {
+		return IfaceAsString(cgrId)
+	}
+	return UUIDSha1Prefix()
+}
+
 // EventWithFlags is used where flags are needed to mark processing
 type EventWithFlags struct {
 	Flags []string

utils/consts.go

@@ -791,6 +791,7 @@ const (
 	MetaCDR                 = "*cdr"
 	MetaExporterIDs         = "*exporterIDs"
 	MetaExporterID          = "*exporterID"
+	MetaChargeID            = "*chargeID"
 	MetaAsync               = "*async"
 	MetaUsage               = "*usage"
 	MetaStartTime           = "*startTime"