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Base system with REST service to issue digital coins, run by the payment service provider
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pg_select_batch_deposits_missing_wire.c (4185B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022-2023 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_batch_deposits_missing_wire.c
     18  * @brief Implementation of the select_batch_deposits_missing_wire function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_pq_lib.h"
     22 #include "taler/exchange-database/select_batch_deposits_missing_wire.h"
     23 #include "helper.h"
     24 
     25 /**
     26  * Closure for #missing_wire_cb().
     27  */
     28 struct MissingWireContext
     29 {
     30   /**
     31    * Function to call per result.
     32    */
     33   TALER_EXCHANGEDB_WireMissingCallback cb;
     34 
     35   /**
     36    * Closure for @e cb.
     37    */
     38   void *cb_cls;
     39 
     40   /**
     41    * Plugin context.
     42    */
     43   struct TALER_EXCHANGEDB_PostgresContext *pg;
     44 
     45   /**
     46    * Set to #GNUNET_SYSERR on error.
     47    */
     48   enum GNUNET_GenericReturnValue status;
     49 };
     50 
     51 
     52 /**
     53  * Invoke the callback for each result.
     54  *
     55  * @param cls a `struct MissingWireContext *`
     56  * @param result SQL result
     57  * @param num_results number of rows in @a result
     58  */
     59 static void
     60 missing_wire_cb (void *cls,
     61                  PGresult *result,
     62                  unsigned int num_results)
     63 {
     64   struct MissingWireContext *mwc = cls;
     65   struct TALER_EXCHANGEDB_PostgresContext *pg = mwc->pg;
     66 
     67   for (unsigned int i = 0; i<num_results; i++)
     68   {
     69     uint64_t batch_deposit_serial_id;
     70     struct GNUNET_TIME_Timestamp deadline;
     71     struct TALER_FullPaytoHashP wire_target_h_payto;
     72     struct TALER_Amount total_amount;
     73     struct GNUNET_PQ_ResultSpec rs[] = {
     74       GNUNET_PQ_result_spec_uint64 ("batch_deposit_serial_id",
     75                                     &batch_deposit_serial_id),
     76       GNUNET_PQ_result_spec_auto_from_type ("wire_target_h_payto",
     77                                             &wire_target_h_payto),
     78       GNUNET_PQ_result_spec_timestamp ("deadline",
     79                                        &deadline),
     80       TALER_PQ_RESULT_SPEC_AMOUNT ("total_amount",
     81                                    &total_amount),
     82       GNUNET_PQ_result_spec_end
     83     };
     84 
     85     if (GNUNET_OK !=
     86         GNUNET_PQ_extract_result (result,
     87                                   rs,
     88                                   i))
     89     {
     90       GNUNET_break (0);
     91       mwc->status = GNUNET_SYSERR;
     92       return;
     93     }
     94     mwc->cb (mwc->cb_cls,
     95              batch_deposit_serial_id,
     96              &total_amount,
     97              &wire_target_h_payto,
     98              deadline);
     99     GNUNET_PQ_cleanup_result (rs);
    100   }
    101 }
    102 
    103 
    104 enum GNUNET_DB_QueryStatus
    105 TALER_EXCHANGEDB_select_batch_deposits_missing_wire (
    106   struct TALER_EXCHANGEDB_PostgresContext *pg,
    107   uint64_t min_batch_deposit_serial_id,
    108   TALER_EXCHANGEDB_WireMissingCallback cb,
    109   void *cb_cls)
    110 {
    111   struct GNUNET_PQ_QueryParam params[] = {
    112     GNUNET_PQ_query_param_uint64 (&min_batch_deposit_serial_id),
    113     GNUNET_PQ_query_param_end
    114   };
    115   struct MissingWireContext mwc = {
    116     .cb = cb,
    117     .cb_cls = cb_cls,
    118     .pg = pg,
    119     .status = GNUNET_OK
    120   };
    121   enum GNUNET_DB_QueryStatus qs;
    122 
    123   PREPARE (pg,
    124            "deposits_get_deposits_missing_wire",
    125            "SELECT"
    126            " batch_deposit_serial_id"
    127            ",wire_target_h_payto"
    128            ",deadline"
    129            ",total_amount"
    130            " FROM exchange_do_select_deposits_missing_wire"
    131            " ($1);");
    132   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
    133                                              "deposits_get_deposits_missing_wire",
    134                                              params,
    135                                              &missing_wire_cb,
    136                                              &mwc);
    137   if (GNUNET_OK != mwc.status)
    138     return GNUNET_DB_STATUS_HARD_ERROR;
    139   return qs;
    140 }