exchange

Base system with REST service to issue digital coins, run by the payment service provider
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pg_get_wire_hash_for_contract.c (3095B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2023, 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 exchangedb/pg_get_wire_hash_for_contract.c
     18  * @brief Implementation of the get_wire_hash_for_contract function for Postgres
     19  * @author Özgür Kesim
     20  */
     21 #include "taler/platform.h"
     22 #include "taler/taler_error_codes.h"
     23 #include "taler/taler_dbevents.h"
     24 #include "taler/taler_exchangedb_plugin.h"
     25 #include "taler/taler_pq_lib.h"
     26 #include "pg_get_wire_hash_for_contract.h"
     27 #include "pg_helper.h"
     28 
     29 
     30 enum GNUNET_DB_QueryStatus
     31 TEH_PG_get_wire_hash_for_contract (
     32   void *cls,
     33   const struct TALER_MerchantPublicKeyP *merchant_pub,
     34   const struct TALER_PrivateContractHashP *h_contract_terms,
     35   struct TALER_MerchantWireHashP *h_wire)
     36 {
     37   struct PostgresClosure *pg = cls;
     38   enum GNUNET_DB_QueryStatus qs;
     39   struct GNUNET_PQ_QueryParam params[] = {
     40     GNUNET_PQ_query_param_auto_from_type (merchant_pub),
     41     GNUNET_PQ_query_param_auto_from_type (h_contract_terms),
     42     GNUNET_PQ_query_param_end
     43   };
     44   struct TALER_FullPayto payto_uri;
     45   struct TALER_WireSaltP wire_salt;
     46   struct GNUNET_PQ_ResultSpec rs[] = {
     47     GNUNET_PQ_result_spec_auto_from_type ("wire_salt",
     48                                           &wire_salt),
     49     GNUNET_PQ_result_spec_string ("payto_uri",
     50                                   &payto_uri.full_payto),
     51     GNUNET_PQ_result_spec_end
     52   };
     53 
     54   /* check if the necessary records exist and get them */
     55   PREPARE (pg,
     56            "get_wire_hash_for_contract",
     57            "SELECT"
     58            "  bdep.wire_salt"
     59            " ,wt.payto_uri"
     60            " FROM coin_deposits"
     61            " JOIN batch_deposits bdep"
     62            "   USING (batch_deposit_serial_id)"
     63            " JOIN wire_targets wt"
     64            "   USING (wire_target_h_payto)"
     65            " WHERE bdep.merchant_pub=$1"
     66            "   AND bdep.h_contract_terms=$2");
     67   /* NOTE: above query might be more efficient if we computed the shard
     68      from the merchant_pub and included that in the query */
     69   qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     70                                                  "get_wire_hash_for_contract",
     71                                                  params,
     72                                                  rs);
     73   if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs)
     74   {
     75     TALER_merchant_wire_signature_hash (payto_uri,
     76                                         &wire_salt,
     77                                         h_wire);
     78     GNUNET_PQ_cleanup_result (rs);
     79   }
     80   return qs;
     81 }