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diff --git a/src/backenddb/pg_update_wirewatch_progress.h b/src/backenddb/pg_update_wirewatch_progress.h
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+++ b/src/backenddb/pg_update_wirewatch_progress.h
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+/*
+   This file is part of TALER
+   Copyright (C) 2022 Taler Systems SA
+
+   TALER 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, or (at your option) any later version.
+
+   TALER 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
+   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+/**
+ * @file backenddb/pg_update_wirewatch_progress.h
+ * @brief implementation of the update_wirewatch_progress function for Postgres
+ * @author Christian Grothoff
+ */
+#ifndef PG_UPDATE_WIREWATCH_PROGRESS_H
+#define PG_UPDATE_WIREWATCH_PROGRESS_H
+
+#include <taler/taler_util.h>
+#include <taler/taler_json_lib.h>
+#include "taler_merchantdb_plugin.h"
+
+
+/**
+ * Update information about progress made by taler-merchant-wirewatch.
+ *
+ * @param cls closure
+ * @param instance name of the instance to record progress for
+ * @param payto_uri bank account URI to record progress for
+ * @param last_serial latest serial of a transaction that was processed
+ * @return transaction status
+ */
+enum GNUNET_DB_QueryStatus
+TMH_PG_update_wirewatch_progress (
+  void *cls,
+  const char *instance,
+  const char *payto_uri,
+  uint64_t last_serial);
+
+
+#endif