Line data    Source code

       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_coin_denomination.c
      18             :  * @brief Implementation of the get_coin_denomination 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_coin_denomination.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : enum GNUNET_DB_QueryStatus
      29          48 : TEH_PG_get_coin_denomination (
      30             :   void *cls,
      31             :   const struct TALER_CoinSpendPublicKeyP *coin_pub,
      32             :   uint64_t *known_coin_id,
      33             :   struct TALER_DenominationHashP *denom_hash)
      34             : {
      35          48 :   struct PostgresClosure *pg = cls;
      36          48 :   struct GNUNET_PQ_QueryParam params[] = {
      37          48 :     GNUNET_PQ_query_param_auto_from_type (coin_pub),
      38             :     GNUNET_PQ_query_param_end
      39             :   };
      40          48 :   struct GNUNET_PQ_ResultSpec rs[] = {
      41          48 :     GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
      42             :                                           denom_hash),
      43          48 :     GNUNET_PQ_result_spec_uint64 ("known_coin_id",
      44             :                                   known_coin_id),
      45             :     GNUNET_PQ_result_spec_end
      46             :   };
      47             : 
      48          48 :   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
      49             :               "Getting coin denomination of coin %s\n",
      50             :               TALER_B2S (coin_pub));
      51             : 
      52             :   /* Used in #postgres_get_coin_denomination() to fetch
      53             :      the denomination public key hash for
      54             :      a coin known to the exchange. */
      55          48 :   PREPARE (pg,
      56             :            "get_coin_denomination",
      57             :            "SELECT"
      58             :            " denominations.denom_pub_hash"
      59             :            ",known_coin_id"
      60             :            " FROM known_coins"
      61             :            " JOIN denominations USING (denominations_serial)"
      62             :            " WHERE coin_pub=$1"
      63             :            " FOR SHARE;");
      64             : 
      65          48 :   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      66             :                                                    "get_coin_denomination",
      67             :                                                    params,
      68             :                                                    rs);
      69             : }