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 exchangedb/pg_select_merge_amounts_for_kyc_check.c
      18             :  * @brief Implementation of the select_merge_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_merge_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             :  * Invoke the callback for each result.
      58             :  *
      59             :  * @param cls a `struct KycAmountCheckContext *`
      60             :  * @param result SQL result
      61             :  * @param num_results number of rows in @a result
      62             :  */
      63             : static void
      64           4 : get_kyc_amounts_cb (void *cls,
      65             :                     PGresult *result,
      66             :                     unsigned int num_results)
      67             : {
      68           4 :   struct KycAmountCheckContext *ctx = cls;
      69           4 :   struct PostgresClosure *pg = ctx->pg;
      70             : 
      71           4 :   for (unsigned int i = 0; i < num_results; i++)
      72             :   {
      73             :     struct GNUNET_TIME_Absolute date;
      74             :     struct TALER_Amount amount;
      75           0 :     struct GNUNET_PQ_ResultSpec rs[] = {
      76           0 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
      77             :                                    &amount),
      78           0 :       GNUNET_PQ_result_spec_absolute_time ("date",
      79             :                                            &date),
      80             :       GNUNET_PQ_result_spec_end
      81             :     };
      82             :     enum GNUNET_GenericReturnValue ret;
      83             : 
      84           0 :     if (GNUNET_OK !=
      85           0 :         GNUNET_PQ_extract_result (result,
      86             :                                   rs,
      87             :                                   i))
      88             :     {
      89           0 :       GNUNET_break (0);
      90           0 :       ctx->status = GNUNET_SYSERR;
      91           0 :       return;
      92             :     }
      93           0 :     ret = ctx->cb (ctx->cb_cls,
      94             :                    &amount,
      95             :                    date);
      96           0 :     GNUNET_PQ_cleanup_result (rs);
      97           0 :     switch (ret)
      98             :     {
      99           0 :     case GNUNET_OK:
     100           0 :       continue;
     101           0 :     case GNUNET_NO:
     102           0 :       break;
     103           0 :     case GNUNET_SYSERR:
     104           0 :       ctx->status = GNUNET_SYSERR;
     105           0 :       break;
     106             :     }
     107           0 :     break;
     108             :   }
     109             : }
     110             : 
     111             : 
     112             : enum GNUNET_DB_QueryStatus
     113           4 : TEH_PG_select_merge_amounts_for_kyc_check (
     114             :   void *cls,
     115             :   const struct TALER_NormalizedPaytoHashP *h_payto,
     116             :   struct GNUNET_TIME_Absolute time_limit,
     117             :   TALER_EXCHANGEDB_KycAmountCallback kac,
     118             :   void *kac_cls)
     119             : {
     120           4 :   struct PostgresClosure *pg = cls;
     121           4 :   struct GNUNET_PQ_QueryParam params[] = {
     122           4 :     GNUNET_PQ_query_param_auto_from_type (h_payto),
     123           4 :     GNUNET_PQ_query_param_absolute_time (&time_limit),
     124             :     GNUNET_PQ_query_param_end
     125             :   };
     126           4 :   struct KycAmountCheckContext ctx = {
     127             :     .cb = kac,
     128             :     .cb_cls = kac_cls,
     129             :     .pg = pg,
     130             :     .status = GNUNET_OK
     131             :   };
     132             :   enum GNUNET_DB_QueryStatus qs;
     133             : 
     134           4 :   PREPARE (pg,
     135             :            "select_kyc_relevant_merge_events",
     136             :            "SELECT"
     137             :            " amount_with_fee AS amount"
     138             :            ",merge_timestamp AS date"
     139             :            " FROM account_merges"
     140             :            " JOIN purse_merges USING (purse_pub)"
     141             :            " JOIN purse_requests USING (purse_pub)"
     142             :            " JOIN purse_decision USING (purse_pub)"
     143             :            " WHERE wallet_h_payto=$1"
     144             :            "   AND merge_timestamp >= $2"
     145             :            "   AND NOT refunded"
     146             :            " ORDER BY merge_timestamp DESC");
     147           4 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     148             :     pg->conn,
     149             :     "select_kyc_relevant_merge_events",
     150             :     params,
     151             :     &get_kyc_amounts_cb,
     152             :     &ctx);
     153           4 :   if (GNUNET_OK != ctx.status)
     154           0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     155           4 :   return qs;
     156             : }