exchange

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

pg_select_aggregation_amounts_for_kyc_check.c (4185B)

      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_aggregation_amounts_for_kyc_check.c
     18  * @brief Implementation of the select_aggregation_amounts_for_kyc_check 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_aggregation_amounts_for_kyc_check.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 /**
     30  * Closure for #get_kyc_amounts_cb().
     31  */
     32 struct KycAmountCheckContext
     33 {
     34   /**
     35    * Function to call per result.
     36    */
     37   TALER_EXCHANGEDB_KycAmountCallback 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    * Flag set to #GNUNET_OK as long as everything is fine.
     51    */
     52   enum GNUNET_GenericReturnValue status;
     53 
     54 };
     55 
     56 
     57 /**
     58  * Invoke the callback for each result.
     59  *
     60  * @param cls a `struct KycAmountCheckContext *`
     61  * @param result SQL result
     62  * @param num_results number of rows in @a result
     63  */
     64 static void
     65 get_kyc_amounts_cb (void *cls,
     66                     PGresult *result,
     67                     unsigned int num_results)
     68 {
     69   struct KycAmountCheckContext *ctx = cls;
     70   struct PostgresClosure *pg = ctx->pg;
     71 
     72   for (unsigned int i = 0; i < num_results; i++)
     73   {
     74     struct GNUNET_TIME_Absolute date;
     75     struct TALER_Amount amount;
     76     struct GNUNET_PQ_ResultSpec rs[] = {
     77       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
     78                                    &amount),
     79       GNUNET_PQ_result_spec_absolute_time ("date",
     80                                            &date),
     81       GNUNET_PQ_result_spec_end
     82     };
     83     enum GNUNET_GenericReturnValue ret;
     84 
     85     if (GNUNET_OK !=
     86         GNUNET_PQ_extract_result (result,
     87                                   rs,
     88                                   i))
     89     {
     90       GNUNET_break (0);
     91       ctx->status = GNUNET_SYSERR;
     92       return;
     93     }
     94     ret = ctx->cb (ctx->cb_cls,
     95                    &amount,
     96                    date);
     97     GNUNET_PQ_cleanup_result (rs);
     98     switch (ret)
     99     {
    100     case GNUNET_OK:
    101       continue;
    102     case GNUNET_NO:
    103       break;
    104     case GNUNET_SYSERR:
    105       ctx->status = GNUNET_SYSERR;
    106       break;
    107     }
    108     break;
    109   }
    110 }
    111 
    112 
    113 enum GNUNET_DB_QueryStatus
    114 TEH_PG_select_aggregation_amounts_for_kyc_check (
    115   void *cls,
    116   const struct TALER_NormalizedPaytoHashP *h_payto,
    117   struct GNUNET_TIME_Absolute time_limit,
    118   TALER_EXCHANGEDB_KycAmountCallback kac,
    119   void *kac_cls)
    120 {
    121   struct PostgresClosure *pg = cls;
    122   struct GNUNET_PQ_QueryParam params[] = {
    123     GNUNET_PQ_query_param_auto_from_type (h_payto),
    124     GNUNET_PQ_query_param_absolute_time (&time_limit),
    125     GNUNET_PQ_query_param_end
    126   };
    127   struct KycAmountCheckContext ctx = {
    128     .cb = kac,
    129     .cb_cls = kac_cls,
    130     .pg = pg,
    131     .status = GNUNET_OK
    132   };
    133   enum GNUNET_DB_QueryStatus qs;
    134 
    135   PREPARE (pg,
    136            "select_kyc_relevant_aggregation_events",
    137            "SELECT"
    138            " amount"
    139            ",execution_date AS date"
    140            " FROM wire_out"
    141            " WHERE wire_target_h_payto IN"
    142            "   (SELECT wire_target_h_payto"
    143            "      FROM wire_targets"
    144            "     WHERE h_normalized_payto=$1"
    145            "   )"
    146            "  AND execution_date >= $2"
    147            " ORDER BY execution_date DESC");
    148 
    149   qs = GNUNET_PQ_eval_prepared_multi_select (
    150     pg->conn,
    151     "select_kyc_relevant_aggregation_events",
    152     params,
    153     &get_kyc_amounts_cb,
    154     &ctx);
    155   if (GNUNET_OK != ctx.status)
    156     return GNUNET_DB_STATUS_HARD_ERROR;
    157   return qs;
    158 }