Initial copy in

rateclass.go

@@ -0,0 +1,18 @@
+package event
+
+type rateClass struct {
+	grantRate float64
+	criteria  map[string]any
+
+	eventRate float64
+}
+
+func (rc *rateClass) match(ev *Event) bool {
+	for k, v := range rc.criteria {
+		if ev.Data[k] != v {
+			return false
+		}
+	}
+
+	return true
+}