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_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 "platform.h"
      22             : #include "taler_error_codes.h"
      23             : #include "taler_dbevents.h"
      24             : #include "taler_pq_lib.h"
      25             : #include "pg_select_purse_deposits_by_purse.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : /**
      29             :  * Closure for #purse_refund_coin_helper_cb().
      30             :  */
      31             : struct PurseRefundCoinContext
      32             : {
      33             : 
      34             :   /**
      35             :    * Callback to call.
      36             :    */
      37             :   TALER_EXCHANGEDB_PurseRefundCoinCallback cb;
      38             : 
      39             :   /**
      40             :    * Closure for @e cb.
      41             :    */
      42             :   void *cb_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Status code, set to #GNUNET_SYSERR on hard errors.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Helper function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results.
      59             :  *
      60             :  * @param cls closure of type `struct PurseRefundCoinContext`
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65           0 : purse_refund_coin_helper_cb (void *cls,
      66             :                              PGresult *result,
      67             :                              unsigned int num_results)
      68             : {
      69           0 :   struct PurseRefundCoinContext *dsc = cls;
      70           0 :   struct PostgresClosure *pg = dsc->pg;
      71             : 
      72           0 :   for (unsigned int i = 0; i<num_results; i++)
      73             :   {
      74             :     struct TALER_Amount amount_with_fee;
      75             :     struct TALER_CoinSpendPublicKeyP coin_pub;
      76             :     struct TALER_DenominationPublicKey denom_pub;
      77             :     uint64_t rowid;
      78           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      79           0 :       TALER_PQ_result_spec_denom_pub ("denom_pub",
      80             :                                       &denom_pub),
      81           0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
      82             :                                    &amount_with_fee),
      83           0 :       GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
      84             :                                             &coin_pub),
      85           0 :       GNUNET_PQ_result_spec_uint64 ("purse_deposit_serial_id",
      86             :                                     &rowid),
      87             :       GNUNET_PQ_result_spec_end
      88             :     };
      89             :     enum GNUNET_GenericReturnValue ret;
      90             : 
      91           0 :     if (GNUNET_OK !=
      92           0 :         GNUNET_PQ_extract_result (result,
      93             :                                   rs,
      94             :                                   i))
      95             :     {
      96           0 :       GNUNET_break (0);
      97           0 :       dsc->status = GNUNET_SYSERR;
      98           0 :       return;
      99             :     }
     100           0 :     ret = dsc->cb (dsc->cb_cls,
     101             :                    rowid,
     102             :                    &amount_with_fee,
     103             :                    &coin_pub,
     104             :                    &denom_pub);
     105           0 :     GNUNET_PQ_cleanup_result (rs);
     106           0 :     if (GNUNET_OK != ret)
     107           0 :       break;
     108             :   }
     109             : }
     110             : 
     111             : 
     112             : enum GNUNET_DB_QueryStatus
     113           0 : TEH_PG_select_purse_deposits_by_purse (
     114             :   void *cls,
     115             :   const struct TALER_PurseContractPublicKeyP *purse_pub,
     116             :   TALER_EXCHANGEDB_PurseRefundCoinCallback cb,
     117             :   void *cb_cls)
     118             : {
     119           0 :   struct PostgresClosure *pg = cls;
     120           0 :   struct GNUNET_PQ_QueryParam params[] = {
     121           0 :     GNUNET_PQ_query_param_auto_from_type (purse_pub),
     122             :     GNUNET_PQ_query_param_end
     123             :   };
     124           0 :   struct PurseRefundCoinContext dsc = {
     125             :     .cb = cb,
     126             :     .cb_cls = cb_cls,
     127             :     .pg = pg,
     128             :     .status = GNUNET_OK
     129             :   };
     130             :   enum GNUNET_DB_QueryStatus qs;
     131             : 
     132           0 :   PREPARE (pg,
     133             :            "audit_get_purse_deposits_by_purse",
     134             :            "SELECT"
     135             :            " pd.purse_deposit_serial_id"
     136             :            ",pd.amount_with_fee"
     137             :            ",pd.coin_pub"
     138             :            ",denom.denom_pub"
     139             :            " FROM purse_deposits pd"
     140             :            " JOIN known_coins kc"
     141             :            "   USING (coin_pub)"
     142             :            " JOIN denominations denom"
     143             :            "   USING (denominations_serial)"
     144             :            " WHERE purse_pub=$1;");
     145           0 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     146             :                                              "audit_get_purse_deposits_by_purse",
     147             :                                              params,
     148             :                                              &purse_refund_coin_helper_cb,
     149             :                                              &dsc);
     150           0 :   if (GNUNET_OK != dsc.status)
     151           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     152           0 :   return qs;
     153             : }