exchange

Base system with REST service to issue digital coins, run by the payment service provider
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pg_reserves_get.c (2277B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022 Taler Systems SA
      4 
      5    TALER is free software; you can redistribute it and/or modify it under the
      6    terms of the GNU General Public License as published by the Free Software
      7    Foundation; either version 3, or (at your option) any later version.
      8 
      9    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License along with
     14    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15  */
     16 /**
     17  * @file exchangedb/pg_reserves_get.c
     18  * @brief Implementation of the reserves_get function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/platform.h"
     22 #include "taler/taler_error_codes.h"
     23 #include "taler/taler_dbevents.h"
     24 #include "taler/taler_pq_lib.h"
     25 #include "pg_reserves_get.h"
     26 #include "pg_helper.h"
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TEH_PG_reserves_get (void *cls,
     30                      struct TALER_EXCHANGEDB_Reserve *reserve)
     31 {
     32   struct PostgresClosure *pg = cls;
     33   struct GNUNET_PQ_QueryParam params[] = {
     34     GNUNET_PQ_query_param_auto_from_type (&reserve->pub),
     35     GNUNET_PQ_query_param_end
     36   };
     37   struct GNUNET_PQ_ResultSpec rs[] = {
     38     TALER_PQ_result_spec_amount ("current_balance",
     39                                  pg->currency,
     40                                  &reserve->balance),
     41     GNUNET_PQ_result_spec_timestamp ("expiration_date",
     42                                      &reserve->expiry),
     43     GNUNET_PQ_result_spec_timestamp ("gc_date",
     44                                      &reserve->gc),
     45     GNUNET_PQ_result_spec_end
     46   };
     47   /* Used in #postgres_reserves_get() */
     48   PREPARE (pg,
     49            "reserves_get",
     50            "SELECT"
     51            " current_balance"
     52            ",expiration_date"
     53            ",gc_date"
     54            " FROM reserves"
     55            " WHERE reserve_pub=$1"
     56            " LIMIT 1;");
     57   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     58                                                    "reserves_get",
     59                                                    params,
     60                                                    rs);
     61 }