merchant

Merchant backend to process payments, run by merchants
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get_contract_terms_pos.c (4330B)

      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 src/backenddb/get_contract_terms_pos.c
     18  * @brief Implementation of the get_contract_terms_pos function for Postgres
     19  * @author Iván Ávalos
     20  */
     21 #include "platform.h"
     22 #include <taler/taler_pq_lib.h>
     23 #include "merchant-database/get_contract_terms_pos.h"
     24 #include "helper.h"
     25 
     26 
     27 enum GNUNET_DB_QueryStatus
     28 TALER_MERCHANTDB_get_contract_terms_pos (
     29   struct TALER_MERCHANTDB_PostgresContext *pg,
     30   const char *instance_id,
     31   const char *order_id,
     32   json_t **contract_terms,
     33   uint64_t *order_serial,
     34   bool *paid,
     35   struct TALER_ClaimTokenP *claim_token,
     36   char **pos_key,
     37   enum TALER_MerchantConfirmationAlgorithm *pos_algorithm,
     38   struct TALER_PosChallengeP *pos_challenge)
     39 {
     40   enum GNUNET_DB_QueryStatus qs;
     41   struct TALER_ClaimTokenP ct;
     42   struct GNUNET_PQ_QueryParam params[] = {
     43     GNUNET_PQ_query_param_string (order_id),
     44     GNUNET_PQ_query_param_end
     45   };
     46   uint32_t pos32 = TALER_MCA_NONE;
     47   bool no_challenge;
     48   struct GNUNET_PQ_ResultSpec rs[] = {
     49     /* contract_terms must be first! */
     50     TALER_PQ_result_spec_json ("contract_terms",
     51                                contract_terms),
     52     GNUNET_PQ_result_spec_uint64 ("order_serial",
     53                                   order_serial),
     54     GNUNET_PQ_result_spec_bool ("paid",
     55                                 paid),
     56     GNUNET_PQ_result_spec_auto_from_type ("claim_token",
     57                                           &ct),
     58     GNUNET_PQ_result_spec_allow_null (
     59       GNUNET_PQ_result_spec_string ("pos_key",
     60                                     pos_key),
     61       NULL),
     62     GNUNET_PQ_result_spec_allow_null (
     63       GNUNET_PQ_result_spec_uint32 ("pos_algorithm",
     64                                     &pos32),
     65       NULL),
     66     GNUNET_PQ_result_spec_allow_null (
     67       GNUNET_PQ_result_spec_auto_from_type ("pos_challenge",
     68                                             pos_challenge),
     69       &no_challenge),
     70     GNUNET_PQ_result_spec_end
     71   };
     72 
     73   GNUNET_assert (NULL != pg->current_merchant_id);
     74   GNUNET_assert (0 == strcmp (instance_id,
     75                               pg->current_merchant_id));
     76   TMH_PQ_prepare_anon (pg,
     77                        "SELECT"
     78                        " contract_terms::TEXT"
     79                        ",order_serial"
     80                        ",claim_token"
     81                        ",paid"
     82                        ",pos_key"
     83                        ",pos_algorithm"
     84                        ",pos_challenge"
     85                        " FROM merchant_contract_terms"
     86                        " WHERE order_id=$1");
     87   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     88                                                  "",
     89                                                  params,
     90                                                  (NULL != contract_terms)
     91                                                    ? rs
     92                                                    : &rs[1]);
     93   if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
     94     return qs;
     95   switch (pos32)
     96   {
     97   case TALER_MCA_NONE:
     98   case TALER_MCA_WITHOUT_PRICE:
     99   case TALER_MCA_WITH_PRICE:
    100   case TALER_MCA_ECDSA_CHALLENGE:
    101   case TALER_MCA_EDDSA_CHALLENGE:
    102     break;
    103   default:
    104     GNUNET_break (0);
    105     GNUNET_PQ_cleanup_result ((NULL != contract_terms) ? rs : &rs[1]);
    106     return GNUNET_DB_STATUS_HARD_ERROR;
    107   }
    108   if (no_challenge &&
    109       ( (TALER_MCA_ECDSA_CHALLENGE == pos32) ||
    110         (TALER_MCA_EDDSA_CHALLENGE == pos32) ))
    111   {
    112     GNUNET_break (0);
    113     GNUNET_PQ_cleanup_result ((NULL != contract_terms) ? rs : &rs[1]);
    114     return GNUNET_DB_STATUS_HARD_ERROR;
    115   }
    116   *pos_algorithm = (enum TALER_MerchantConfirmationAlgorithm) pos32;
    117   if (NULL != claim_token)
    118     *claim_token = ct;
    119   return qs;
    120 }