merchant

Merchant backend to process payments, run by merchants
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lookup_contract_terms.c (3064B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022-2024 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 src/backenddb/lookup_contract_terms.c
     18  * @brief Implementation of the lookup_contract_terms function for Postgres
     19  * @author Iván Ávalos
     20  * @author Christian Grothoff
     21  */
     22 #include "platform.h"
     23 #include <taler/taler_error_codes.h>
     24 #include <taler/taler_dbevents.h>
     25 #include <taler/taler_pq_lib.h>
     26 #include "merchant-database/lookup_contract_terms.h"
     27 #include "helper.h"
     28 
     29 
     30 enum GNUNET_DB_QueryStatus
     31 TALER_MERCHANTDB_lookup_contract_terms (struct TALER_MERCHANTDB_PostgresContext *pg,
     32                                         const char *instance_id,
     33                                         const char *order_id,
     34                                         json_t **contract_terms,
     35                                         uint64_t *order_serial,
     36                                         struct TALER_ClaimTokenP *claim_token)
     37 {
     38   enum GNUNET_DB_QueryStatus qs;
     39   struct TALER_ClaimTokenP ct;
     40   struct GNUNET_PQ_QueryParam params[] = {
     41     GNUNET_PQ_query_param_string (instance_id),
     42     GNUNET_PQ_query_param_string (order_id),
     43     GNUNET_PQ_query_param_end
     44   };
     45   struct GNUNET_PQ_ResultSpec rs[] = {
     46     /* contract_terms must be first! */
     47     TALER_PQ_result_spec_json ("contract_terms",
     48                                contract_terms),
     49     GNUNET_PQ_result_spec_uint64 ("order_serial",
     50                                   order_serial),
     51     GNUNET_PQ_result_spec_auto_from_type ("claim_token",
     52                                           &ct),
     53     GNUNET_PQ_result_spec_end
     54   };
     55 
     56   check_connection (pg);
     57   PREPARE (pg,
     58            "lookup_contract_terms",
     59            "SELECT"
     60            " contract_terms::TEXT"
     61            ",order_serial"
     62            ",claim_token"
     63            " FROM merchant_contract_terms"
     64            " WHERE order_id=$2"
     65            "   AND merchant_serial="
     66            "     (SELECT merchant_serial"
     67            "        FROM merchant_instances"
     68            "        WHERE merchant_id=$1)");
     69   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     70                                                  "lookup_contract_terms",
     71                                                  params,
     72                                                  (NULL != contract_terms)
     73                                                    ? rs
     74                                                    : &rs[1]);
     75   if (NULL != claim_token)
     76     *claim_token = ct;
     77   return qs;
     78 }