list by pages and rate req limits

internal/common/xcontext/wait.go

@@ -0,0 +1,15 @@
+package xcontext
+
+import (
+	"context"
+	"time"
+)
+
+func Wait(ctx context.Context, wait time.Duration) error {
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-time.After(wait):
+		return nil
+	}
+}