1 files changed, 61 insertions, 0 deletions
diff --git a/src/backenddb/pg_select_otp_serial.c b/src/backenddb/pg_select_otp_serial.c
new file mode 100644
index 00000000..c2011aad
--- /dev/null
+++ b/src/backenddb/pg_select_otp_serial.c
@@ -0,0 +1,61 @@
+/*
+   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_select_otp_serial.c
+ * @brief Implementation of the select_otp_serial function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include <taler/taler_error_codes.h>
+#include <taler/taler_dbevents.h>
+#include <taler/taler_pq_lib.h>
+#include "pg_select_otp_serial.h"
+#include "pg_helper.h"
+
+
+enum GNUNET_DB_QueryStatus
+TMH_PG_select_otp_serial (void *cls,
+                          const char *instance_id,
+                          const char *otp_id,
+                          uint64_t *serial)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_string (instance_id),
+    GNUNET_PQ_query_param_string (otp_id),
+    GNUNET_PQ_query_param_end
+  };
+  struct GNUNET_PQ_ResultSpec rs[] = {
+    GNUNET_PQ_result_spec_uint64 ("otp_serial",
+                                  serial),
+    GNUNET_PQ_result_spec_end
+  };
+
+  check_connection (pg);
+  PREPARE (pg,
+           "select_otp_serial",
+           "SELECT"
+           " otp_serial"
+           " FROM merchant_otp_devices"
+           " JOIN merchant_instances"
+           "   USING (merchant_serial)"
+           " WHERE merchant_instances.merchant_id=$1"
+           "   AND merchant_otp_devices.otp_id=$2");
+  return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
+                                                   "select_otp_serial",
+                                                   params,
+                                                   rs);
+}