exchange

Base system with REST service to issue digital coins, run by the payment service provider
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pg_get_purse_deposit.c (3150B)

      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/pg_get_purse_deposit.c
     18  * @brief Implementation of the get_purse_deposit function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/platform.h"
     22 #include "taler/taler_error_codes.h"
     23 #include "taler/taler_dbevents.h"
     24 #include "taler/taler_pq_lib.h"
     25 #include "pg_get_purse_deposit.h"
     26 #include "pg_helper.h"
     27 
     28 enum GNUNET_DB_QueryStatus
     29 TEH_PG_get_purse_deposit (
     30   void *cls,
     31   const struct TALER_PurseContractPublicKeyP *purse_pub,
     32   const struct TALER_CoinSpendPublicKeyP *coin_pub,
     33   struct TALER_Amount *amount,
     34   struct TALER_DenominationHashP *h_denom_pub,
     35   struct TALER_AgeCommitmentHashP *phac,
     36   struct TALER_CoinSpendSignatureP *coin_sig,
     37   char **partner_url)
     38 {
     39   struct PostgresClosure *pg = cls;
     40   struct GNUNET_PQ_QueryParam params[] = {
     41     GNUNET_PQ_query_param_auto_from_type (purse_pub),
     42     GNUNET_PQ_query_param_auto_from_type (coin_pub),
     43     GNUNET_PQ_query_param_end
     44   };
     45   bool is_null;
     46   struct GNUNET_PQ_ResultSpec rs[] = {
     47     GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
     48                                           h_denom_pub),
     49     GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
     50                                           phac),
     51     GNUNET_PQ_result_spec_auto_from_type ("coin_sig",
     52                                           coin_sig),
     53     TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
     54                                  amount),
     55     GNUNET_PQ_result_spec_allow_null (
     56       GNUNET_PQ_result_spec_string ("partner_base_url",
     57                                     partner_url),
     58       &is_null),
     59     GNUNET_PQ_result_spec_end
     60   };
     61 
     62   *partner_url = NULL;
     63   PREPARE (pg,
     64            "select_purse_deposit_by_coin_pub",
     65            "SELECT "
     66            " coin_sig"
     67            ",amount_with_fee"
     68            ",denom_pub_hash"
     69            ",age_commitment_hash"
     70            ",partner_base_url"
     71            " FROM purse_deposits"
     72            " LEFT JOIN partners"
     73            "   USING (partner_serial_id)"
     74            " JOIN known_coins kc"
     75            "   USING (coin_pub)"
     76            " JOIN denominations"
     77            "   USING (denominations_serial)"
     78            " WHERE purse_pub=$1"
     79            "   AND coin_pub=$2;");
     80   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     81                                                    "select_purse_deposit_by_coin_pub",
     82                                                    params,
     83                                                    rs);
     84 }