exchange

Base system with REST service to issue digital coins, run by the payment service provider
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pg_get_wire_fee_summary.c (2154B)

      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 pg_get_wire_fee_summary.c
     18  * @brief Low-level (statement-level) Postgres database access for the exchange
     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_get_wire_fee_summary.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 /**
     30  * Get summary information about an exchanges wire fee balance.
     31  *
     32  * @param cls the @e cls of this struct with the plugin-specific state
     33  * @param[out] wire_fee_balance set amount the exchange gained in wire fees
     34  * @return transaction status code
     35  */
     36 enum GNUNET_DB_QueryStatus
     37 TAH_PG_get_wire_fee_summary (void *cls,
     38                              struct TALER_Amount *wire_fee_balance)
     39 {
     40   struct PostgresClosure *pg = cls;
     41   struct GNUNET_PQ_QueryParam params[] = {
     42     GNUNET_PQ_query_param_end
     43   };
     44   struct GNUNET_PQ_ResultSpec rs[] = {
     45     TALER_PQ_RESULT_SPEC_AMOUNT ("wire_fee_balance",
     46                                  wire_fee_balance),
     47     GNUNET_PQ_result_spec_end
     48   };
     49 
     50   PREPARE (pg,
     51            "auditor_wire_fee_balance_select",
     52            "SELECT"
     53            " wire_fee_balance"
     54            " FROM auditor_wire_fee_balance");
     55   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     56                                                    "auditor_wire_fee_balance_select",
     57                                                    params,
     58                                                    rs);
     59 }