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+// Copyright (c) 2019 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_FLATFILE_H
+#define BITCOIN_FLATFILE_H
+
+#include <chain.h>
+#include <fs.h>
+
+/**
+ * FlatFileSeq represents a sequence of numbered files storing raw data. This class facilitates
+ * access to and efficient management of these files.
+ */
+class FlatFileSeq
+{
+private:
+ const fs::path m_dir;
+ const char* const m_prefix;
+ const size_t m_chunk_size;
+
+public:
+ /**
+ * Constructor
+ *
+ * @param dir The base directory that all files live in.
+ * @param prefix A short prefix given to all file names.
+ * @param chunk_size Disk space is pre-allocated in multiples of this amount.
+ */
+ FlatFileSeq(fs::path dir, const char* prefix, size_t chunk_size);
+
+ /** Get the name of the file at the given position. */
+ fs::path FileName(const CDiskBlockPos& pos) const;
+};
+
+#endif // BITCOIN_FLATFILE_H