1 files changed, 55 insertions, 0 deletions
diff --git a/src/exchangedb/pg_get_reserve_balance.c b/src/exchangedb/pg_get_reserve_balance.c
new file mode 100644
index 000000000..140bf3b70
--- /dev/null
+++ b/src/exchangedb/pg_get_reserve_balance.c
@@ -0,0 +1,55 @@
+/*
+   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_reserve_balance.c
+ * @brief Implementation of the get_reserve_balance function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_get_reserve_balance.h"
+#include "pg_helper.h"
+
+enum GNUNET_DB_QueryStatus
+TEH_PG_get_reserve_balance (void *cls,
+                            const struct TALER_ReservePublicKeyP *reserve_pub,
+                            struct TALER_Amount *balance)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_auto_from_type (reserve_pub),
+    GNUNET_PQ_query_param_end
+  };
+  struct GNUNET_PQ_ResultSpec rs[] = {
+    TALER_PQ_result_spec_amount ("current_balance",
+                                 pg->currency,
+                                 balance),
+    GNUNET_PQ_result_spec_end
+  };
+
+  PREPARE (pg,
+           "get_reserve_balance",
+           "SELECT"
+           " current_balance"
+           " FROM reserves"
+           " WHERE reserve_pub=$1;");
+  return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
+                                                   "get_reserve_balance",
+                                                   params,
+                                                   rs);
+}