Line data    Source code

       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_get_reserve_balance.c
      18              :  * @brief Implementation of the get_reserve_balance 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_get_reserve_balance.h"
      26              : #include "pg_helper.h"
      27              : 
      28              : 
      29              : enum GNUNET_DB_QueryStatus
      30           37 : TEH_PG_get_reserve_balance (
      31              :   void *cls,
      32              :   const struct TALER_ReservePublicKeyP *reserve_pub,
      33              :   struct TALER_Amount *balance,
      34              :   struct TALER_FullPayto *origin_account)
      35              : {
      36           37 :   struct PostgresClosure *pg = cls;
      37           37 :   struct GNUNET_PQ_QueryParam params[] = {
      38           37 :     GNUNET_PQ_query_param_auto_from_type (reserve_pub),
      39              :     GNUNET_PQ_query_param_end
      40              :   };
      41           37 :   struct GNUNET_PQ_ResultSpec rs[] = {
      42           37 :     TALER_PQ_result_spec_amount ("current_balance",
      43           37 :                                  pg->currency,
      44              :                                  balance),
      45           37 :     GNUNET_PQ_result_spec_allow_null (
      46              :       GNUNET_PQ_result_spec_string ("payto_uri",
      47              :                                     &origin_account->full_payto),
      48              :       NULL),
      49              :     GNUNET_PQ_result_spec_end
      50              :   };
      51              : 
      52           37 :   origin_account->full_payto = NULL;
      53           37 :   PREPARE (pg,
      54              :            "get_reserve_balance",
      55              :            "SELECT"
      56              :            "  r.current_balance"
      57              :            " ,wt.payto_uri"
      58              :            " FROM reserves r"
      59              :            " LEFT JOIN reserves_in ri"
      60              :            "   USING (reserve_pub)"
      61              :            " LEFT JOIN wire_targets wt"
      62              :            "   ON (wt.wire_target_h_payto = ri.wire_source_h_payto)"
      63              :            " WHERE r.reserve_pub=$1"
      64              :            " LIMIT 1;");
      65           37 :   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      66              :                                                    "get_reserve_balance",
      67              :                                                    params,
      68              :                                                    rs);
      69              : }