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Base system with REST service to issue digital coins, run by the payment service provider
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pg_lookup_auditor_timestamp.c (1983B)

      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_lookup_auditor_timestamp.c
     18  * @brief Implementation of the lookup_auditor_timestamp function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_pq_lib.h"
     22 #include "taler/exchange-database/lookup_auditor_timestamp.h"
     23 #include "helper.h"
     24 
     25 
     26 enum GNUNET_DB_QueryStatus
     27 TALER_EXCHANGEDB_lookup_auditor_timestamp (
     28   struct TALER_EXCHANGEDB_PostgresContext *pg,
     29   const struct TALER_AuditorPublicKeyP *auditor_pub,
     30   struct GNUNET_TIME_Timestamp *last_date)
     31 {
     32   struct GNUNET_PQ_QueryParam params[] = {
     33     GNUNET_PQ_query_param_auto_from_type (auditor_pub),
     34     GNUNET_PQ_query_param_end
     35   };
     36   struct GNUNET_PQ_ResultSpec rs[] = {
     37     GNUNET_PQ_result_spec_timestamp ("last_change",
     38                                      last_date),
     39     GNUNET_PQ_result_spec_end
     40   };
     41 
     42   /* Used in #postgres_lookup_auditor_timestamp() */
     43   PREPARE (pg,
     44            "lookup_auditor_timestamp",
     45            "SELECT"
     46            " last_change"
     47            " FROM auditors"
     48            " WHERE auditor_pub=$1;");
     49   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     50                                                    "lookup_auditor_timestamp",
     51                                                    params,
     52                                                    rs);
     53 }