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/insert_reserve_closed.c
      18              :  * @brief Implementation of the insert_reserve_closed function for Postgres
      19              :  * @author Christian Grothoff
      20              :  */
      21              : #include "taler/taler_pq_lib.h"
      22              : #include "exchange-database/insert_reserve_closed.h"
      23              : #include "helper.h"
      24              : #include "exchange-database/reserves_get.h"
      25              : #include "exchange-database/reserves_update.h"
      26              : 
      27              : enum GNUNET_DB_QueryStatus
      28            9 : TALER_EXCHANGEDB_insert_reserve_closed (
      29              :   struct TALER_EXCHANGEDB_PostgresContext *pg,
      30              :   const struct TALER_ReservePublicKeyP *reserve_pub,
      31              :   struct GNUNET_TIME_Timestamp execution_date,
      32              :   const struct TALER_FullPayto receiver_account,
      33              :   const struct TALER_WireTransferIdentifierRawP *wtid,
      34              :   const struct TALER_Amount *amount_with_fee,
      35              :   const struct TALER_Amount *closing_fee,
      36              :   uint64_t close_request_row)
      37              : {
      38              :   struct TALER_EXCHANGEDB_Reserve reserve;
      39              :   enum GNUNET_DB_QueryStatus qs;
      40              :   struct TALER_FullPaytoHashP h_payto;
      41              : 
      42            9 :   TALER_full_payto_hash (receiver_account,
      43              :                          &h_payto);
      44              :   {
      45            9 :     struct GNUNET_PQ_QueryParam params[] = {
      46            9 :       GNUNET_PQ_query_param_auto_from_type (reserve_pub),
      47            9 :       GNUNET_PQ_query_param_timestamp (&execution_date),
      48            9 :       GNUNET_PQ_query_param_auto_from_type (wtid),
      49            9 :       GNUNET_PQ_query_param_auto_from_type (&h_payto),
      50            9 :       TALER_PQ_query_param_amount (pg->conn,
      51              :                                    amount_with_fee),
      52            9 :       TALER_PQ_query_param_amount (pg->conn,
      53              :                                    closing_fee),
      54            9 :       GNUNET_PQ_query_param_uint64 (&close_request_row),
      55              :       GNUNET_PQ_query_param_end
      56              :     };
      57              : 
      58            9 :     PREPARE (pg,
      59              :              "reserves_close_insert",
      60              :              "INSERT INTO reserves_close "
      61              :              "(reserve_pub"
      62              :              ",execution_date"
      63              :              ",wtid"
      64              :              ",wire_target_h_payto"
      65              :              ",amount"
      66              :              ",closing_fee"
      67              :              ",close_request_row"
      68              :              ") VALUES ($1, $2, $3, $4, $5, $6, $7);");
      69              : 
      70            9 :     qs = GNUNET_PQ_eval_prepared_non_select (pg->conn,
      71              :                                              "reserves_close_insert",
      72              :                                              params);
      73              :   }
      74            9 :   if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
      75            0 :     return qs;
      76              : 
      77              :   /* update reserve balance */
      78            9 :   reserve.pub = *reserve_pub;
      79            9 :   if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
      80            9 :       (qs = TALER_EXCHANGEDB_reserves_get (pg,
      81              :                                            &reserve)))
      82              :   {
      83              :     /* Existence should have been checked before we got here... */
      84            0 :     GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
      85            0 :     if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
      86            0 :       qs = GNUNET_DB_STATUS_HARD_ERROR;
      87            0 :     return qs;
      88              :   }
      89              :   {
      90              :     enum TALER_AmountArithmeticResult ret;
      91              : 
      92            9 :     ret = TALER_amount_subtract (&reserve.balance,
      93              :                                  &reserve.balance,
      94              :                                  amount_with_fee);
      95            9 :     if (ret < 0)
      96              :     {
      97              :       /* The reserve history was checked to make sure there is enough of a balance
      98              :          left before we tried this; however, concurrent operations may have changed
      99              :          the situation by now.  We should re-try the transaction.  */
     100            0 :       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
     101              :                   "Closing of reserve `%s' refused due to balance mismatch. Retrying.\n",
     102              :                   TALER_B2S (reserve_pub));
     103            0 :       return GNUNET_DB_STATUS_HARD_ERROR;
     104              :     }
     105            9 :     GNUNET_break (TALER_AAR_RESULT_ZERO == ret);
     106              :   }
     107            9 :   return TALER_EXCHANGEDB_reserves_update (pg,
     108              :                                            &reserve);
     109              : }