diff --git a/util.hpp b/util.hpp
new file mode 100644
index 0000000..8634bcd
--- /dev/null
+++ b/util.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <string>
+
+namespace blobs
+{
+
+extern const std::string verifyBlobId;
+extern const std::string hashBlobId;
+extern const std::string activeImageBlobId;
+extern const std::string activeHashBlobId;
+extern const std::string staticLayoutBlobId;
+extern const std::string ubiTarballBlobId;
+
+} // namespace blobs