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              : }