Line data    Source code

       1              : /*
       2              :    This file is part of TALER
       3              :    Copyright (C) 2022 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/get_wire_fees.c
      18              :  * @brief Implementation of the get_wire_fees function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/get_wire_fees.h"
      23              : #include "helper.h"
      24              : 
      25              : /**
      26              :  * Closure for #get_wire_fees_cb().
      27              :  */
      28              : struct GetWireFeesContext
      29              : {
      30              :   /**
      31              :    * Function to call per result.
      32              :    */
      33              :   TALER_EXCHANGEDB_WireFeeCallback cb;
      34              : 
      35              :   /**
      36              :    * Closure for @e cb.
      37              :    */
      38              :   void *cb_cls;
      39              : 
      40              :   /**
      41              :    * Plugin context.
      42              :    */
      43              :   struct TALER_EXCHANGEDB_PostgresContext *pg;
      44              : 
      45              :   /**
      46              :    * Flag set to #GNUNET_OK as long as everything is fine.
      47              :    */
      48              :   enum GNUNET_GenericReturnValue status;
      49              : 
      50              : };
      51              : 
      52              : 
      53              : /**
      54              :  * Invoke the callback for each result.
      55              :  *
      56              :  * @param cls a `struct GetWireFeesContext *`
      57              :  * @param result SQL result
      58              :  * @param num_results number of rows in @a result
      59              :  */
      60              : static void
      61           19 : get_wire_fees_cb (void *cls,
      62              :                   PGresult *result,
      63              :                   unsigned int num_results)
      64              : {
      65           19 :   struct GetWireFeesContext *ctx = cls;
      66           19 :   struct TALER_EXCHANGEDB_PostgresContext *pg = ctx->pg;
      67              : 
      68           57 :   for (unsigned int i = 0; i < num_results; i++)
      69              :   {
      70              :     struct TALER_MasterSignatureP master_sig;
      71              :     struct TALER_WireFeeSet fees;
      72              :     struct GNUNET_TIME_Timestamp start_date;
      73              :     struct GNUNET_TIME_Timestamp end_date;
      74           38 :     struct GNUNET_PQ_ResultSpec rs[] = {
      75           38 :       TALER_PQ_RESULT_SPEC_AMOUNT ("wire_fee",
      76              :                                    &fees.wire),
      77           38 :       TALER_PQ_RESULT_SPEC_AMOUNT ("closing_fee",
      78              :                                    &fees.closing),
      79           38 :       GNUNET_PQ_result_spec_timestamp ("start_date",
      80              :                                        &start_date),
      81           38 :       GNUNET_PQ_result_spec_timestamp ("end_date",
      82              :                                        &end_date),
      83           38 :       GNUNET_PQ_result_spec_auto_from_type ("master_sig",
      84              :                                             &master_sig),
      85              :       GNUNET_PQ_result_spec_end
      86              :     };
      87              : 
      88           38 :     if (GNUNET_OK !=
      89           38 :         GNUNET_PQ_extract_result (result,
      90              :                                   rs,
      91              :                                   i))
      92              :     {
      93            0 :       GNUNET_break (0);
      94            0 :       ctx->status = GNUNET_SYSERR;
      95            0 :       return;
      96              :     }
      97           38 :     ctx->cb (ctx->cb_cls,
      98              :              &fees,
      99              :              start_date,
     100              :              end_date,
     101              :              &master_sig);
     102           38 :     GNUNET_PQ_cleanup_result (rs);
     103              :   }
     104              : }
     105              : 
     106              : 
     107              : enum GNUNET_DB_QueryStatus
     108           19 : TALER_TALER_EXCHANGEDB_get_wire_fees (struct TALER_EXCHANGEDB_PostgresContext *
     109              :                                       pg,
     110              :                                       const char *wire_method,
     111              :                                       TALER_EXCHANGEDB_WireFeeCallback cb,
     112              :                                       void *cb_cls)
     113              : {
     114           19 :   struct GNUNET_PQ_QueryParam params[] = {
     115           19 :     GNUNET_PQ_query_param_string (wire_method),
     116              :     GNUNET_PQ_query_param_end
     117              :   };
     118           19 :   struct GetWireFeesContext ctx = {
     119              :     .cb = cb,
     120              :     .cb_cls = cb_cls,
     121              :     .pg = pg,
     122              :     .status = GNUNET_OK
     123              :   };
     124              :   enum GNUNET_DB_QueryStatus qs;
     125              : 
     126           19 :   PREPARE (pg,
     127              :            "get_wire_fees",
     128              :            "SELECT"
     129              :            " wire_fee"
     130              :            ",closing_fee"
     131              :            ",start_date"
     132              :            ",end_date"
     133              :            ",master_sig"
     134              :            " FROM wire_fee"
     135              :            " WHERE wire_method=$1");
     136           19 :   qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
     137              :                                              "get_wire_fees",
     138              :                                              params,
     139              :                                              &get_wire_fees_cb,
     140              :                                              &ctx);
     141           19 :   if (GNUNET_OK != ctx.status)
     142            0 :     return GNUNET_DB_STATUS_HARD_ERROR;
     143           19 :   return qs;
     144              : }