1 files changed, 28 insertions, 0 deletions
diff --git a/src/util/readwritefile.h b/src/util/readwritefile.h
new file mode 100644
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--- /dev/null
+++ b/src/util/readwritefile.h
@@ -0,0 +1,28 @@
+// Copyright (c) 2015-2020 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_UTIL_READWRITEFILE_H
+#define BITCOIN_UTIL_READWRITEFILE_H
+
+#include <fs.h>
+
+#include <limits>
+#include <string>
+#include <utility>
+
+/** Read full contents of a file and return them in a std::string.
+ * Returns a pair <status, string>.
+ * If an error occurred, status will be false, otherwise status will be true and the data will be returned in string.
+ *
+ * @param maxsize Puts a maximum size limit on the file that is read. If the file is larger than this, truncated data
+ *         (with len > maxsize) will be returned.
+ */
+std::pair<bool,std::string> ReadBinaryFile(const fs::path &filename, size_t maxsize=std::numeric_limits<size_t>::max());
+
+/** Write contents of std::string to a file.
+ * @return true on success.
+ */
+bool WriteBinaryFile(const fs::path &filename, const std::string &data);
+
+#endif /* BITCOIN_UTIL_READWRITEFILE_H */