exchange

Base system with REST service to issue digital coins, run by the payment service provider
Log | Files | Refs | Submodules | README | LICENSE

pg_iterate_reserve_close_info.c (3621B)

      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 pg_iterate_reserve_close_info.c
     18  * @brief Low-level (statement-level) Postgres database access for the exchange
     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_iterate_reserve_close_info.h"
     26 #include "pg_helper.h"
     27 
     28 /**
     29  * Closure for #iterate_reserve_close_info_cb()
     30  */
     31 struct IteratorContext
     32 {
     33   /**
     34    * Function to call with the results.
     35    */
     36   TALER_EXCHANGEDB_KycAmountCallback cb;
     37 
     38   /**
     39    * Closure to pass to @e cb
     40    */
     41   void *cb_cls;
     42 
     43   /**
     44    * Plugin context.
     45    */
     46   struct PostgresClosure *pg;
     47 };
     48 
     49 
     50 /**
     51  * Helper function for #TEH_PG_iterate_reserve_close_info().
     52  * Calls the callback with each denomination key.
     53  *
     54  * @param cls a `struct IteratorContext`
     55  * @param result db results
     56  * @param num_results number of results in @a result
     57  */
     58 static void
     59 iterate_reserve_close_info_cb (void *cls,
     60                                PGresult *result,
     61                                unsigned int num_results)
     62 {
     63   struct IteratorContext *ic = cls;
     64   struct PostgresClosure *pg = ic->pg;
     65 
     66   for (unsigned int i = 0; i<num_results; i++)
     67   {
     68     struct TALER_Amount amount;
     69     struct GNUNET_TIME_Absolute ts;
     70     struct GNUNET_PQ_ResultSpec rs[] = {
     71       GNUNET_PQ_result_spec_absolute_time ("execution_date",
     72                                            &ts),
     73       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
     74                                    &amount),
     75       GNUNET_PQ_result_spec_end
     76     };
     77 
     78     if (GNUNET_OK !=
     79         GNUNET_PQ_extract_result (result,
     80                                   rs,
     81                                   i))
     82     {
     83       GNUNET_break (0);
     84       return;
     85     }
     86     ic->cb (ic->cb_cls,
     87             &amount,
     88             ts);
     89   }
     90 }
     91 
     92 
     93 enum GNUNET_DB_QueryStatus
     94 TEH_PG_iterate_reserve_close_info (
     95   void *cls,
     96   const struct TALER_NormalizedPaytoHashP *h_payto,
     97   struct GNUNET_TIME_Absolute time_limit,
     98   TALER_EXCHANGEDB_KycAmountCallback kac,
     99   void *kac_cls)
    100 {
    101   struct PostgresClosure *pg = cls;
    102   struct GNUNET_PQ_QueryParam params[] = {
    103     GNUNET_PQ_query_param_auto_from_type (h_payto),
    104     GNUNET_PQ_query_param_absolute_time (&time_limit),
    105     GNUNET_PQ_query_param_end
    106   };
    107   struct IteratorContext ic = {
    108     .cb = kac,
    109     .cb_cls = kac_cls,
    110     .pg = pg
    111   };
    112 
    113   PREPARE (pg,
    114            "iterate_reserve_close_info",
    115            "SELECT amount"
    116            "      ,execution_date"
    117            "  FROM reserves_close"
    118            " WHERE wire_target_h_payto IN ("
    119            "   SELECT wire_target_h_payto"
    120            "     FROM wire_targets"
    121            "    WHERE h_normalized_payto=$1"
    122            "   )"
    123            "   AND execution_date >= $2"
    124            " ORDER BY execution_date DESC");
    125   return GNUNET_PQ_eval_prepared_multi_select (
    126     pg->conn,
    127     "iterate_reserve_close_info",
    128     params,
    129     &iterate_reserve_close_info_cb,
    130     &ic);
    131 }