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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_lookup_global_fee_by_time.h
+ * @brief implementation of the lookup_global_fee_by_time function for Postgres
+ * @author Christian Grothoff
+ */
+#ifndef PG_LOOKUP_GLOBAL_FEE_BY_TIME_H
+#define PG_LOOKUP_GLOBAL_FEE_BY_TIME_H
+
+#include "taler_util.h"
+#include "taler_json_lib.h"
+#include "taler_exchangedb_plugin.h"
+
+/**
+ * Lookup information about known global fees.
+ *
+ * @param cls closure
+ * @param start_time starting time of fee
+ * @param end_time end time of fee
+ * @param[out] fees set to wire fees for that time period; if
+ * different global fee exists within this time
+ * period, an 'invalid' amount is returned.
+ * @param[out] purse_timeout set to when unmerged purses expire
+ * @param[out] history_expiration set to when we expire reserve histories
+ * @param[out] purse_account_limit set to number of free purses
+ * @return transaction status code
+ */
+enum GNUNET_DB_QueryStatus
+TEH_PG_lookup_global_fee_by_time (
+ void *cls,
+ struct GNUNET_TIME_Timestamp start_time,
+ struct GNUNET_TIME_Timestamp end_time,
+ struct TALER_GlobalFeeSet *fees,
+ struct GNUNET_TIME_Relative *purse_timeout,
+ struct GNUNET_TIME_Relative *history_expiration,
+ uint32_t *purse_account_limit);
+
+#endif