Initial commit

library/rate/rate.go

@@ -0,0 +1,22 @@
+package rate
+
+import (
+	"context"
+)
+
+// Op operations type.
+type Op int
+
+const (
+	// Success opertion type: success
+	Success Op = iota
+	// Ignore opertion type: ignore
+	Ignore
+	// Drop opertion type: drop
+	Drop
+)
+
+// Limiter limit interface.
+type Limiter interface {
+	Allow(ctx context.Context) (func(Op), error)
+}