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 get_reserve_close_info.c
      18              :  * @brief Low-level (statement-level) Postgres database access for the exchange
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/get_reserve_close_info.h"
      23              : #include "helper.h"
      24              : 
      25              : 
      26              : enum GNUNET_DB_QueryStatus
      27           10 : TALER_EXCHANGEDB_get_reserve_close_info (
      28              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      29              :   const struct TALER_ReservePublicKeyP *reserve_pub,
      30              :   struct TALER_Amount *balance,
      31              :   struct TALER_FullPayto *payto_uri)
      32              : {
      33           10 :   struct GNUNET_PQ_QueryParam params[] = {
      34           10 :     GNUNET_PQ_query_param_auto_from_type (reserve_pub),
      35              :     GNUNET_PQ_query_param_end
      36              :   };
      37           10 :   struct GNUNET_PQ_ResultSpec rs[] = {
      38           10 :     TALER_PQ_result_spec_amount ("current_balance",
      39           10 :                                  pg->currency,
      40              :                                  balance),
      41           10 :     GNUNET_PQ_result_spec_allow_null (
      42              :       GNUNET_PQ_result_spec_string ("payto_uri",
      43              :                                     &payto_uri->full_payto),
      44              :       NULL),
      45              :     GNUNET_PQ_result_spec_end
      46              :   };
      47              : 
      48              :   /* A reserve that was funded peer-to-peer (purse merge or wad) has no
      49              :      'reserves_in' row, so the LEFT JOIN yields a NULL payto_uri.  The caller
      50              :      checks for that and has a 409 ready; reading it without allow_null made
      51              :      the extraction fail and turned that case into an HTTP 500. */
      52           10 :   payto_uri->full_payto = NULL;
      53           10 :   PREPARE (pg,
      54              :            "get_reserve_close_info",
      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 (ri.wire_source_h_payto = wt.wire_target_h_payto)"
      63              :            " WHERE r.reserve_pub=$1;");
      64           10 :   return GNUNET_PQ_eval_prepared_singleton_select (
      65              :     pg->conn,
      66              :     "get_reserve_close_info",
      67              :     params,
      68              :     rs);
      69              : }