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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_wire_out_above_serial_id_by_account.c (4623B)

      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 exchangedb/pg_select_wire_out_above_serial_id_by_account.c
     18  * @brief Implementation of the select_wire_out_above_serial_id_by_account function for Postgres
     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_select_wire_out_above_serial_id_by_account.h"
     26 #include "pg_helper.h"
     27 
     28 /**
     29  * Closure for #wire_out_serial_helper_cb().
     30  */
     31 struct WireOutSerialContext
     32 {
     33 
     34   /**
     35    * Callback to call.
     36    */
     37   TALER_EXCHANGEDB_WireTransferOutCallback 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   int 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 WireOutSerialContext`
     61  * @param result the postgres result
     62  * @param num_results the number of results in @a result
     63  */
     64 static void
     65 wire_out_serial_helper_cb (void *cls,
     66                            PGresult *result,
     67                            unsigned int num_results)
     68 {
     69   struct WireOutSerialContext *wosc = cls;
     70   struct PostgresClosure *pg = wosc->pg;
     71 
     72   for (unsigned int i = 0; i<num_results; i++)
     73   {
     74     uint64_t rowid;
     75     struct GNUNET_TIME_Timestamp date;
     76     struct TALER_WireTransferIdentifierRawP wtid;
     77     struct TALER_FullPayto payto_uri;
     78     struct TALER_Amount amount;
     79     struct GNUNET_PQ_ResultSpec rs[] = {
     80       GNUNET_PQ_result_spec_uint64 ("wireout_uuid",
     81                                     &rowid),
     82       GNUNET_PQ_result_spec_timestamp ("execution_date",
     83                                        &date),
     84       GNUNET_PQ_result_spec_auto_from_type ("wtid_raw",
     85                                             &wtid),
     86       GNUNET_PQ_result_spec_string ("payto_uri",
     87                                     &payto_uri.full_payto),
     88       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
     89                                    &amount),
     90       GNUNET_PQ_result_spec_end
     91     };
     92     int ret;
     93 
     94     if (GNUNET_OK !=
     95         GNUNET_PQ_extract_result (result,
     96                                   rs,
     97                                   i))
     98     {
     99       GNUNET_break (0);
    100       wosc->status = GNUNET_SYSERR;
    101       return;
    102     }
    103     ret = wosc->cb (wosc->cb_cls,
    104                     rowid,
    105                     date,
    106                     &wtid,
    107                     payto_uri,
    108                     &amount);
    109     GNUNET_PQ_cleanup_result (rs);
    110     if (GNUNET_OK != ret)
    111       break;
    112   }
    113 }
    114 
    115 
    116 enum GNUNET_DB_QueryStatus
    117 TEH_PG_select_wire_out_above_serial_id_by_account (
    118   void *cls,
    119   const char *account_name,
    120   uint64_t serial_id,
    121   TALER_EXCHANGEDB_WireTransferOutCallback cb,
    122   void *cb_cls)
    123 {
    124   struct PostgresClosure *pg = cls;
    125   struct GNUNET_PQ_QueryParam params[] = {
    126     GNUNET_PQ_query_param_uint64 (&serial_id),
    127     GNUNET_PQ_query_param_string (account_name),
    128     GNUNET_PQ_query_param_end
    129   };
    130   struct WireOutSerialContext wosc = {
    131     .cb = cb,
    132     .cb_cls = cb_cls,
    133     .pg = pg,
    134     .status = GNUNET_OK
    135   };
    136   enum GNUNET_DB_QueryStatus qs;
    137 
    138   PREPARE (pg,
    139            "select_wire_out_above_serial_id_by_account",
    140            "SELECT"
    141            " wo.wireout_uuid"
    142            ",wo.execution_date"
    143            ",wo.wtid_raw"
    144            ",wt.payto_uri"
    145            ",wo.amount"
    146            " FROM wire_out wo"
    147            " JOIN wire_targets wt"
    148            "   USING (wire_target_h_payto)"
    149            " WHERE wo.wireout_uuid>=$1 "
    150            "   AND wo.exchange_account_section=$2"
    151            " ORDER BY wo.wireout_uuid ASC;");
    152   qs = GNUNET_PQ_eval_prepared_multi_select (
    153     pg->conn,
    154     "select_wire_out_above_serial_id_by_account",
    155     params,
    156     &wire_out_serial_helper_cb,
    157     &wosc);
    158   if (GNUNET_OK != wosc.status)
    159     return GNUNET_DB_STATUS_HARD_ERROR;
    160   return qs;
    161 }