diff --git a/backend/store.go b/backend/store.go
new file mode 100644
index 0000000..82d1659
--- /dev/null
+++ b/backend/store.go
@@ -0,0 +1,8 @@
+package main
+
+const (
+	STATE_INIT = iota
+	STATE_READY
+	STATE_UPDATING
+	STATE_ERROR
+)