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diff --git a/src/libknot/error.h b/src/libknot/error.h
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+++ b/src/libknot/error.h
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+/*  Copyright (C) 2016 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/*!
+* \file
+*
+* \brief Error codes and function for getting error message.
+*
+* \addtogroup libknot
+* @{
+*/
+
+#pragma once
+
+#include "libknot/errcode.h"
+
+/*!
+ * \brief Returns error message for the given error code.
+ *
+ * \param code Error code.
+ *
+ * \return String containing the error message.
+ */
+const char *knot_strerror(int code);
+
+/*!
+ * \brief Translates error code from libdnssec into libknot.
+ *
+ * This is just temporary until everything from libdnssec moved to libknot.
+ *
+ * \param libdnssec_errcode Error code from libdnssec
+ *
+ * \return Error code.
+ */
+int knot_error_from_libdnssec(int libdnssec_errcode);
+
+/*! @} */