LCOV - code coverage report
Current view: top level - exchangedb - pg_get_expired_reserves.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 29 37 78.4 %
Date: 2025-06-05 21:03:14 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :    This file is part of TALER
       3             :    Copyright (C) 2022, 2024 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 pg_get_expired_reserves.c
      18             :  * @brief Low-level (statement-level) Postgres database access for the exchange
      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_get_expired_reserves.h"
      26             : #include "pg_helper.h"
      27             : 
      28             : 
      29             : /**
      30             :  * Closure for #reserve_expired_cb().
      31             :  */
      32             : struct ExpiredReserveContext
      33             : {
      34             :   /**
      35             :    * Function to call for each expired reserve.
      36             :    */
      37             :   TALER_EXCHANGEDB_ReserveExpiredCallback rec;
      38             : 
      39             :   /**
      40             :    * Closure to give to @e rec.
      41             :    */
      42             :   void *rec_cls;
      43             : 
      44             :   /**
      45             :    * Plugin context.
      46             :    */
      47             :   struct PostgresClosure *pg;
      48             : 
      49             :   /**
      50             :    * Set to #GNUNET_SYSERR on error.
      51             :    */
      52             :   enum GNUNET_GenericReturnValue status;
      53             : };
      54             : 
      55             : 
      56             : /**
      57             :  * Function to be called with the results of a SELECT statement
      58             :  * that has returned @a num_results results.
      59             :  *
      60             :  * @param cls closure
      61             :  * @param result the postgres result
      62             :  * @param num_results the number of results in @a result
      63             :  */
      64             : static void
      65          31 : reserve_expired_cb (void *cls,
      66             :                     PGresult *result,
      67             :                     unsigned int num_results)
      68             : {
      69          31 :   struct ExpiredReserveContext *erc = cls;
      70          31 :   struct PostgresClosure *pg = erc->pg;
      71          31 :   enum GNUNET_GenericReturnValue ret = GNUNET_OK;
      72             : 
      73          40 :   for (unsigned int i = 0; i<num_results; i++)
      74             :   {
      75             :     struct GNUNET_TIME_Timestamp exp_date;
      76             :     struct TALER_FullPayto account_details;
      77             :     struct TALER_ReservePublicKeyP reserve_pub;
      78             :     struct TALER_Amount remaining_balance;
      79           9 :     struct GNUNET_PQ_ResultSpec rs[] = {
      80           9 :       GNUNET_PQ_result_spec_timestamp ("expiration_date",
      81             :                                        &exp_date),
      82           9 :       GNUNET_PQ_result_spec_string ("account_details",
      83             :                                     &account_details.full_payto),
      84           9 :       GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
      85             :                                             &reserve_pub),
      86           9 :       TALER_PQ_result_spec_amount ("current_balance",
      87           9 :                                    pg->currency,
      88             :                                    &remaining_balance),
      89             :       GNUNET_PQ_result_spec_end
      90             :     };
      91             : 
      92           9 :     if (GNUNET_OK !=
      93           9 :         GNUNET_PQ_extract_result (result,
      94             :                                   rs,
      95             :                                   i))
      96             :     {
      97           0 :       GNUNET_break (0);
      98           0 :       ret = GNUNET_SYSERR;
      99           0 :       break;
     100             :     }
     101           9 :     ret = erc->rec (erc->rec_cls,
     102             :                     &reserve_pub,
     103             :                     &remaining_balance,
     104             :                     account_details,
     105             :                     exp_date,
     106             :                     0);
     107           9 :     GNUNET_PQ_cleanup_result (rs);
     108           9 :     if (GNUNET_OK != ret)
     109           0 :       break;
     110             :   }
     111          31 :   erc->status = ret;
     112          31 : }
     113             : 
     114             : 
     115             : enum GNUNET_DB_QueryStatus
     116          31 : TEH_PG_get_expired_reserves (
     117             :   void *cls,
     118             :   struct GNUNET_TIME_Timestamp now,
     119             :   TALER_EXCHANGEDB_ReserveExpiredCallback rec,
     120             :   void *rec_cls)
     121             : {
     122          31 :   struct PostgresClosure *pg = cls;
     123          31 :   struct GNUNET_PQ_QueryParam params[] = {
     124          31 :     GNUNET_PQ_query_param_timestamp (&now),
     125             :     GNUNET_PQ_query_param_end
     126             :   };
     127          31 :   struct ExpiredReserveContext ectx = {
     128             :     .rec = rec,
     129             :     .rec_cls = rec_cls,
     130             :     .pg = pg,
     131             :     .status = GNUNET_OK
     132             :   };
     133             :   enum GNUNET_DB_QueryStatus qs;
     134             : 
     135          31 :   PREPARE (pg,
     136             :            "get_expired_reserves",
     137             :            "WITH ed AS MATERIALIZED ( "
     138             :            " SELECT expiration_date"
     139             :            "       ,wire_source_h_payto"
     140             :            "       ,current_balance"
     141             :            "       ,r.reserve_pub"
     142             :            " FROM reserves r"
     143             :            " JOIN reserves_in"
     144             :            "   USING (reserve_pub)"
     145             :            " WHERE expiration_date <= $1 "
     146             :            "   AND ((current_balance).val != 0 OR (current_balance).frac != 0) "
     147             :            " ORDER BY expiration_date ASC "
     148             :            " LIMIT 1 "
     149             :            ") "
     150             :            "SELECT"
     151             :            "  wt.payto_uri AS account_details"
     152             :            " ,ed.expiration_date"
     153             :            " ,ed.reserve_pub"
     154             :            " ,ed.current_balance"
     155             :            " FROM wire_targets wt"
     156             :            " JOIN ed"
     157             :            "   ON (ed.wire_source_h_payto=wt.wire_target_h_payto);");
     158          31 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     159             :                                              "get_expired_reserves",
     160             :                                              params,
     161             :                                              &reserve_expired_cb,
     162             :                                              &ectx);
     163          31 :   switch (ectx.status)
     164             :   {
     165           0 :   case GNUNET_SYSERR:
     166           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     167           0 :   case GNUNET_NO:
     168           0 :     return GNUNET_DB_STATUS_SOFT_ERROR;
     169          31 :   case GNUNET_OK:
     170          31 :     break;
     171             :   }
     172          31 :   return qs;
     173             : }

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