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           42 : 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           42 :   struct PostgresClosure *pg = cls;
      36           42 :   struct GNUNET_PQ_QueryParam params[] = {
      37           42 :     GNUNET_PQ_query_param_auto_from_type (coin_pub),
      38              :     GNUNET_PQ_query_param_end
      39              :   };
      40           42 :   struct GNUNET_PQ_ResultSpec rs[] = {
      41           42 :     GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
      42              :                                           denom_hash),
      43           42 :     GNUNET_PQ_result_spec_uint64 ("known_coin_id",
      44              :                                   known_coin_id),
      45              :     GNUNET_PQ_result_spec_end
      46              :   };
      47              : 
      48           42 :   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           42 :   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           42 :   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
      66              :                                                    "get_coin_denomination",
      67              :                                                    params,
      68              :                                                    rs);
      69              : }