1 files changed, 27 insertions, 0 deletions
diff --git a/storage/diff_scheme_checker.hpp b/storage/diff_scheme_checker.hpp
new file mode 100644
index 0000000000..c338604769
--- /dev/null
+++ b/storage/diff_scheme_checker.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include "storage/diff_types.hpp"
+
+#include <cstdint>
+#include <functional>
+#include <string>
+#include <unordered_map>
+
+namespace diff_scheme
+{
+class Checker final
+{
+public:
+  using NameVersionMap = std::unordered_map<std::string, uint64_t>;
+
+  struct LocalMapsInfo final
+  {
+    uint64_t m_currentDataVersion = 0;
+    NameVersionMap m_localMaps;
+  };
+
+  using Callback = std::function<void(NameFileMap const & diffs)>;
+
+  static void Check(LocalMapsInfo const & info, Callback const & fn);
+};
+}  // namespace diff_scheme