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/iterate_merge_amounts_for_kyc_check.c
      18              :  * @brief Implementation of the iterate_merge_amounts_for_kyc_check function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/iterate_merge_amounts_for_kyc_check.h"
      23              : #include "helper.h"
      24              : 
      25              : 
      26              : /**
      27              :  * Closure for #get_kyc_amounts_cb().
      28              :  */
      29              : struct KycAmountCheckContext
      30              : {
      31              :   /**
      32              :    * Function to call per result.
      33              :    */
      34              :   TALER_KYCLOGIC_KycAmountCallback cb;
      35              : 
      36              :   /**
      37              :    * Closure for @e cb.
      38              :    */
      39              :   void *cb_cls;
      40              : 
      41              :   /**
      42              :    * Plugin context.
      43              :    */
      44              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      45              : 
      46              :   /**
      47              :    * Flag set to #GNUNET_OK as long as everything is fine.
      48              :    */
      49              :   enum GNUNET_GenericReturnValue status;
      50              : 
      51              : };
      52              : 
      53              : /**
      54              :  * Invoke the callback for each result.
      55              :  *
      56              :  * @param cls a `struct KycAmountCheckContext *`
      57              :  * @param result SQL result
      58              :  * @param num_results number of rows in @a result
      59              :  */
      60              : static void
      61           10 : get_kyc_amounts_cb (void *cls,
      62              :                     PGresult *result,
      63              :                     unsigned int num_results)
      64              : {
      65           10 :   struct KycAmountCheckContext *ctx = cls;
      66           10 :   struct TALER_EXCHANGEDB_PostgresContext *pg = ctx->pg;
      67              : 
      68           11 :   for (unsigned int i = 0; i < num_results; i++)
      69              :   {
      70              :     struct GNUNET_TIME_Absolute date;
      71              :     struct TALER_Amount amount;
      72            2 :     struct GNUNET_PQ_ResultSpec rs[] = {
      73            2 :       TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
      74              :                                    &amount),
      75            2 :       GNUNET_PQ_result_spec_absolute_time ("date",
      76              :                                            &date),
      77              :       GNUNET_PQ_result_spec_end
      78              :     };
      79              :     enum GNUNET_GenericReturnValue ret;
      80              : 
      81            2 :     if (GNUNET_OK !=
      82            2 :         GNUNET_PQ_extract_result (result,
      83              :                                   rs,
      84              :                                   i))
      85              :     {
      86            0 :       GNUNET_break (0);
      87            0 :       ctx->status = GNUNET_SYSERR;
      88            0 :       return;
      89              :     }
      90            2 :     ret = ctx->cb (ctx->cb_cls,
      91              :                    &amount,
      92              :                    date);
      93            2 :     GNUNET_PQ_cleanup_result (rs);
      94            2 :     switch (ret)
      95              :     {
      96            1 :     case GNUNET_OK:
      97            1 :       continue;
      98            1 :     case GNUNET_NO:
      99            1 :       break;
     100            0 :     case GNUNET_SYSERR:
     101            0 :       ctx->status = GNUNET_SYSERR;
     102            0 :       break;
     103              :     }
     104            1 :     break;
     105              :   }
     106              : }
     107              : 
     108              : 
     109              : enum GNUNET_DB_QueryStatus
     110           10 : TALER_EXCHANGEDB_iterate_merge_amounts_for_kyc_check (
     111              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
     112              :   const struct TALER_NormalizedPaytoHashP *h_payto,
     113              :   struct GNUNET_TIME_Absolute time_limit,
     114              :   TALER_KYCLOGIC_KycAmountCallback kac,
     115              :   void *kac_cls)
     116              : {
     117           10 :   struct GNUNET_PQ_QueryParam params[] = {
     118           10 :     GNUNET_PQ_query_param_auto_from_type (h_payto),
     119           10 :     GNUNET_PQ_query_param_absolute_time (&time_limit),
     120              :     GNUNET_PQ_query_param_end
     121              :   };
     122           10 :   struct KycAmountCheckContext ctx = {
     123              :     .cb = kac,
     124              :     .cb_cls = kac_cls,
     125              :     .pg = pg,
     126              :     .status = GNUNET_OK
     127              :   };
     128              :   enum GNUNET_DB_QueryStatus qs;
     129              : 
     130           10 :   PREPARE (pg,
     131              :            "iterate_merge_amounts_for_kyc_check",
     132              :            "SELECT"
     133              :            " amount_with_fee AS amount"
     134              :            ",merge_timestamp AS date"
     135              :            " FROM account_merges"
     136              :            " JOIN purse_merges USING (purse_pub)"
     137              :            " JOIN purse_requests USING (purse_pub)"
     138              :            " JOIN purse_decision USING (purse_pub)"
     139              :            " WHERE wallet_h_payto=$1"
     140              :            "   AND merge_timestamp >= $2"
     141              :            "   AND NOT refunded"
     142              :            " ORDER BY merge_timestamp DESC");
     143           10 :   qs = GNUNET_PQ_eval_prepared_multi_select (
     144              :     pg->conn,
     145              :     "iterate_merge_amounts_for_kyc_check",
     146              :     params,
     147              :     &get_kyc_amounts_cb,
     148              :     &ctx);
     149           10 :   if (GNUNET_OK != ctx.status)
     150            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     151           10 :   return qs;
     152              : }