exchange

Base system with REST service to issue digital coins, run by the payment service provider
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select_contract.c (2618B)

      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/select_contract.c
     18  * @brief Implementation of the select_contract function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_pq_lib.h"
     22 #include "exchange-database/select_contract.h"
     23 #include "helper.h"
     24 
     25 enum GNUNET_DB_QueryStatus
     26 TALER_EXCHANGEDB_select_contract (struct TALER_EXCHANGEDB_PostgresContext *pg,
     27                                   const struct TALER_ContractDiffiePublicP *
     28                                   pub_ckey,
     29                                   struct TALER_PurseContractPublicKeyP *
     30                                   purse_pub,
     31                                   struct TALER_PurseContractSignatureP *
     32                                   econtract_sig,
     33                                   size_t *econtract_size,
     34                                   void **econtract)
     35 {
     36   struct GNUNET_PQ_QueryParam params[] = {
     37     GNUNET_PQ_query_param_auto_from_type (pub_ckey),
     38     GNUNET_PQ_query_param_end
     39   };
     40   struct GNUNET_PQ_ResultSpec rs[] = {
     41     GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
     42                                           purse_pub),
     43     GNUNET_PQ_result_spec_auto_from_type ("contract_sig",
     44                                           econtract_sig),
     45     GNUNET_PQ_result_spec_variable_size ("e_contract",
     46                                          econtract,
     47                                          econtract_size),
     48     GNUNET_PQ_result_spec_end
     49   };
     50 
     51   /* Used in #postgres_select_contract */
     52   PREPARE (pg,
     53            "select_contract",
     54            "SELECT "
     55            " purse_pub"
     56            ",e_contract"
     57            ",contract_sig"
     58            " FROM contracts"
     59            "   WHERE pub_ckey=$1;");
     60   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     61                                                    "select_contract",
     62                                                    params,
     63                                                    rs);
     64 
     65 }