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diff --git a/src/exchangedb/pg_get_refresh_reveal.h b/src/exchangedb/pg_get_refresh_reveal.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 exchangedb/pg_get_refresh_reveal.h
+ * @brief implementation of the get_refresh_reveal function for Postgres
+ * @author Christian Grothoff
+ */
+#ifndef PG_GET_REFRESH_REVEAL_H
+#define PG_GET_REFRESH_REVEAL_H
+
+#include "taler_util.h"
+#include "taler_json_lib.h"
+#include "taler_exchangedb_plugin.h"
+
+/**
+ * Lookup in the database the coins that we want to
+ * create in the given refresh operation.
+ *
+ * @param cls the `struct PostgresClosure` with the plugin-specific state
+ * @param rc identify commitment and thus refresh operation
+ * @param cb function to call with the results
+ * @param cb_cls closure for @a cb
+ * @return transaction status
+ */
+enum GNUNET_DB_QueryStatus
+TEH_PG_get_refresh_reveal (void *cls,
+ const struct TALER_RefreshCommitmentP *rc,
+ TALER_EXCHANGEDB_RefreshCallback cb,
+ void *cb_cls);
+
+#endif