merchant

Merchant backend to process payments, run by merchants
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lookup_contract_terms.c (2765B)

      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_pq_lib.h>
     24 #include "merchant-database/lookup_contract_terms.h"
     25 #include "helper.h"
     26 
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TALER_MERCHANTDB_lookup_contract_terms (
     30   struct TALER_MERCHANTDB_PostgresContext *pg,
     31   const char *instance_id,
     32   const char *order_id,
     33   json_t **contract_terms,
     34   uint64_t *order_serial,
     35   struct TALER_ClaimTokenP *claim_token)
     36 {
     37   enum GNUNET_DB_QueryStatus qs;
     38   struct TALER_ClaimTokenP ct;
     39   struct GNUNET_PQ_QueryParam params[] = {
     40     GNUNET_PQ_query_param_string (order_id),
     41     GNUNET_PQ_query_param_end
     42   };
     43   struct GNUNET_PQ_ResultSpec rs[] = {
     44     /* contract_terms must be first! */
     45     TALER_PQ_result_spec_json ("contract_terms",
     46                                contract_terms),
     47     GNUNET_PQ_result_spec_uint64 ("order_serial",
     48                                   order_serial),
     49     GNUNET_PQ_result_spec_auto_from_type ("claim_token",
     50                                           &ct),
     51     GNUNET_PQ_result_spec_end
     52   };
     53 
     54   GNUNET_assert (NULL != pg->current_merchant_id);
     55   GNUNET_assert (0 == strcmp (instance_id,
     56                               pg->current_merchant_id));
     57   check_connection (pg);
     58   TMH_PQ_prepare_anon (pg,
     59                        "SELECT"
     60                        " contract_terms::TEXT"
     61                        ",order_serial"
     62                        ",claim_token"
     63                        " FROM merchant_contract_terms"
     64                        " WHERE order_id=$1");
     65   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     66                                                  "",
     67                                                  params,
     68                                                  (NULL != contract_terms)
     69                                                  ? rs
     70                                                  : &rs[1]);
     71   if (NULL != claim_token)
     72     *claim_token = ct;
     73   return qs;
     74 }