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/select_purse_deposits_by_purse.c
      18              :  * @brief Implementation of the select_purse_deposits_by_purse function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/select_purse_deposits_by_purse.h"
      23              : #include "helper.h"
      24              : 
      25              : /**
      26              :  * Closure for #purse_refund_coin_helper_cb().
      27              :  */
      28              : struct PurseRefundCoinContext
      29              : {
      30              : 
      31              :   /**
      32              :    * Callback to call.
      33              :    */
      34              :   TALER_EXCHANGEDB_PurseRefundCoinCallback cb;
      35              : 
      36              :   /**
      37              :    * Closure for @e cb.
      38              :    */
      39              :   void *cb_cls;
      40              : 
      41              :   /**
      42              :    * Plugin context.
      43              :    */
      44              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      45              : 
      46              :   /**
      47              :    * Status code, set to #GNUNET_SYSERR on hard errors.
      48              :    */
      49              :   enum GNUNET_GenericReturnValue status;
      50              : };
      51              : 
      52              : 
      53              : /**
      54              :  * Helper function to be called with the results of a SELECT statement
      55              :  * that has returned @a num_results results.
      56              :  *
      57              :  * @param cls closure of type `struct PurseRefundCoinContext`
      58              :  * @param result the postgres result
      59              :  * @param num_results the number of results in @a result
      60              :  */
      61              : static void
      62            0 : purse_refund_coin_helper_cb (void *cls,
      63              :                              PGresult *result,
      64              :                              unsigned int num_results)
      65              : {
      66            0 :   struct PurseRefundCoinContext *dsc = cls;
      67            0 :   struct TALER_EXCHANGEDB_PostgresContext *pg = dsc->pg;
      68              : 
      69            0 :   for (unsigned int i = 0; i<num_results; i++)
      70              :   {
      71              :     struct TALER_Amount amount_with_fee;
      72              :     struct TALER_CoinSpendPublicKeyP coin_pub;
      73              :     struct TALER_DenominationPublicKey denom_pub;
      74              :     uint64_t rowid;
      75            0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      76            0 :       TALER_PQ_result_spec_denom_pub ("denom_pub",
      77              :                                       &denom_pub),
      78            0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
      79              :                                    &amount_with_fee),
      80            0 :       GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
      81              :                                             &coin_pub),
      82            0 :       GNUNET_PQ_result_spec_uint64 ("purse_deposit_serial_id",
      83              :                                     &rowid),
      84              :       GNUNET_PQ_result_spec_end
      85              :     };
      86              :     enum GNUNET_GenericReturnValue ret;
      87              : 
      88            0 :     if (GNUNET_OK !=
      89            0 :         GNUNET_PQ_extract_result (result,
      90              :                                   rs,
      91              :                                   i))
      92              :     {
      93            0 :       GNUNET_break (0);
      94            0 :       dsc->status = GNUNET_SYSERR;
      95            0 :       return;
      96              :     }
      97            0 :     ret = dsc->cb (dsc->cb_cls,
      98              :                    rowid,
      99              :                    &amount_with_fee,
     100              :                    &coin_pub,
     101              :                    &denom_pub);
     102            0 :     GNUNET_PQ_cleanup_result (rs);
     103            0 :     if (GNUNET_OK != ret)
     104            0 :       break;
     105              :   }
     106              : }
     107              : 
     108              : 
     109              : enum GNUNET_DB_QueryStatus
     110            0 : TALER_TALER_EXCHANGEDB_select_purse_deposits_by_purse (
     111              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
     112              :   const struct TALER_PurseContractPublicKeyP *purse_pub,
     113              :   TALER_EXCHANGEDB_PurseRefundCoinCallback cb,
     114              :   void *cb_cls)
     115              : {
     116            0 :   struct GNUNET_PQ_QueryParam params[] = {
     117            0 :     GNUNET_PQ_query_param_auto_from_type (purse_pub),
     118              :     GNUNET_PQ_query_param_end
     119              :   };
     120            0 :   struct PurseRefundCoinContext dsc = {
     121              :     .cb = cb,
     122              :     .cb_cls = cb_cls,
     123              :     .pg = pg,
     124              :     .status = GNUNET_OK
     125              :   };
     126              :   enum GNUNET_DB_QueryStatus qs;
     127              : 
     128            0 :   PREPARE (pg,
     129              :            "audit_get_purse_deposits_by_purse",
     130              :            "SELECT"
     131              :            " pd.purse_deposit_serial_id"
     132              :            ",pd.amount_with_fee"
     133              :            ",pd.coin_pub"
     134              :            ",denom.denom_pub"
     135              :            " FROM purse_deposits pd"
     136              :            " JOIN known_coins kc"
     137              :            "   USING (coin_pub)"
     138              :            " JOIN denominations denom"
     139              :            "   USING (denominations_serial)"
     140              :            " WHERE purse_pub=$1;");
     141            0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     142              :                                              "audit_get_purse_deposits_by_purse",
     143              :                                              params,
     144              :                                              &purse_refund_coin_helper_cb,
     145              :                                              &dsc);
     146            0 :   if (GNUNET_OK != dsc.status)
     147            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     148            0 :   return qs;
     149              : }