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Base system with REST service to issue digital coins, run by the payment service provider
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pg_get_purse_info.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 auditordb/pg_get_purse_info.c
     18  * @brief Implementation of the get_purse_info 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_purse_info.h"
     26 #include "pg_helper.h"
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TAH_PG_get_purse_info (
     30   void *cls,
     31   const struct TALER_PurseContractPublicKeyP *purse_pub,
     32   uint64_t *rowid,
     33   struct TALER_Amount *balance,
     34   struct GNUNET_TIME_Timestamp *expiration_date)
     35 {
     36   struct PostgresClosure *pg = cls;
     37   struct GNUNET_PQ_QueryParam params[] = {
     38     GNUNET_PQ_query_param_auto_from_type (purse_pub),
     39     GNUNET_PQ_query_param_end
     40   };
     41   struct GNUNET_PQ_ResultSpec rs[] = {
     42     TALER_PQ_RESULT_SPEC_AMOUNT ("balance",
     43                                  balance),
     44     GNUNET_PQ_result_spec_timestamp ("expiration_date",
     45                                      expiration_date),
     46     GNUNET_PQ_result_spec_uint64 ("auditor_purses_rowid",
     47                                   rowid),
     48     GNUNET_PQ_result_spec_end
     49   };
     50 
     51   PREPARE (pg,
     52            "auditor_get_purse_info",
     53            "SELECT"
     54            " auditor_purses_rowid"
     55            ",expiration_date"
     56            ",balance"
     57            " FROM auditor_purses"
     58            " WHERE purse_pub=$1");
     59   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     60                                                    "auditor_get_purse_info",
     61                                                    params,
     62                                                    rs);
     63 }