1 files changed, 93 insertions, 0 deletions
diff --git a/src/exchangedb/pg_do_refund.c b/src/exchangedb/pg_do_refund.c
new file mode 100644
index 000000000..194dab18d
--- /dev/null
+++ b/src/exchangedb/pg_do_refund.c
@@ -0,0 +1,93 @@
+/*
+   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_do_refund.c
+ * @brief Implementation of the do_refund 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_do_refund.h"
+#include "pg_helper.h"
+#include "pg_compute_shard.h"
+
+
+enum GNUNET_DB_QueryStatus
+TEH_PG_do_refund (
+  void *cls,
+  const struct TALER_EXCHANGEDB_Refund *refund,
+  const struct TALER_Amount *deposit_fee,
+  uint64_t known_coin_id,
+  bool *not_found,
+  bool *refund_ok,
+  bool *gone,
+  bool *conflict)
+{
+  struct PostgresClosure *pg = cls;
+  uint64_t deposit_shard = TEH_PG_compute_shard (&refund->details.merchant_pub);
+  struct TALER_Amount amount_without_fee;
+  struct GNUNET_PQ_QueryParam params[] = {
+    TALER_PQ_query_param_amount (pg->conn,
+                                 &refund->details.refund_amount),
+    TALER_PQ_query_param_amount (pg->conn,
+                                 &amount_without_fee),
+    TALER_PQ_query_param_amount (pg->conn,
+                                 deposit_fee),
+    GNUNET_PQ_query_param_auto_from_type (&refund->details.h_contract_terms),
+    GNUNET_PQ_query_param_uint64 (&refund->details.rtransaction_id),
+    GNUNET_PQ_query_param_uint64 (&deposit_shard),
+    GNUNET_PQ_query_param_uint64 (&known_coin_id),
+    GNUNET_PQ_query_param_auto_from_type (&refund->coin.coin_pub),
+    GNUNET_PQ_query_param_auto_from_type (&refund->details.merchant_pub),
+    GNUNET_PQ_query_param_auto_from_type (&refund->details.merchant_sig),
+    GNUNET_PQ_query_param_end
+  };
+  struct GNUNET_PQ_ResultSpec rs[] = {
+    GNUNET_PQ_result_spec_bool ("not_found",
+                                not_found),
+    GNUNET_PQ_result_spec_bool ("refund_ok",
+                                refund_ok),
+    GNUNET_PQ_result_spec_bool ("gone",
+                                gone),
+    GNUNET_PQ_result_spec_bool ("conflict",
+                                conflict),
+    GNUNET_PQ_result_spec_end
+  };
+
+  if (0 >
+      TALER_amount_subtract (&amount_without_fee,
+                             &refund->details.refund_amount,
+                             &refund->details.refund_fee))
+  {
+    GNUNET_break (0);
+    return GNUNET_DB_STATUS_HARD_ERROR;
+  }
+  PREPARE (pg,
+           "call_refund",
+           "SELECT "
+           " out_not_found AS not_found"
+           ",out_refund_ok AS refund_ok"
+           ",out_gone AS gone"
+           ",out_conflict AS conflict"
+           " FROM exchange_do_refund"
+           " ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10);");
+  return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
+                                                   "call_refund",
+                                                   params,
+                                                   rs);
+}