Line data    Source code

       1             : /*
       2             :   This file is part of TALER
       3             :   Copyright (C) 2017-2020 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/exchangedb_transactions.c
      18             :  * @brief Logic to compute transaction totals of a transaction list for a coin
      19             :  * @author Christian Grothoff
      20             :  */
      21             : #include "platform.h"
      22             : #include "taler_exchangedb_lib.h"
      23             : 
      24             : 
      25             : enum GNUNET_GenericReturnValue
      26           0 : TALER_EXCHANGEDB_calculate_transaction_list_totals (
      27             :   struct TALER_EXCHANGEDB_TransactionList *tl,
      28             :   const struct TALER_Amount *off,
      29             :   struct TALER_Amount *ret)
      30             : {
      31           0 :   struct TALER_Amount spent = *off;
      32             :   struct TALER_Amount refunded;
      33             :   struct TALER_Amount deposit_fee;
      34             :   bool have_refund;
      35             : 
      36           0 :   GNUNET_assert (GNUNET_OK ==
      37             :                  TALER_amount_set_zero (spent.currency,
      38             :                                         &refunded));
      39           0 :   have_refund = false;
      40           0 :   for (struct TALER_EXCHANGEDB_TransactionList *pos = tl;
      41             :        NULL != pos;
      42           0 :        pos = pos->next)
      43             :   {
      44           0 :     switch (pos->type)
      45             :     {
      46           0 :     case TALER_EXCHANGEDB_TT_DEPOSIT:
      47             :       /* spent += pos->amount_with_fee */
      48           0 :       if (0 >
      49           0 :           TALER_amount_add (&spent,
      50             :                             &spent,
      51           0 :                             &pos->details.deposit->amount_with_fee))
      52             :       {
      53           0 :         GNUNET_break (0);
      54           0 :         return GNUNET_SYSERR;
      55             :       }
      56           0 :       deposit_fee = pos->details.deposit->deposit_fee;
      57           0 :       break;
      58           0 :     case TALER_EXCHANGEDB_TT_MELT:
      59             :       /* spent += pos->amount_with_fee */
      60           0 :       if (0 >
      61           0 :           TALER_amount_add (&spent,
      62             :                             &spent,
      63           0 :                             &pos->details.melt->amount_with_fee))
      64             :       {
      65           0 :         GNUNET_break (0);
      66           0 :         return GNUNET_SYSERR;
      67             :       }
      68           0 :       break;
      69           0 :     case TALER_EXCHANGEDB_TT_REFUND:
      70             :       /* refunded += pos->refund_amount - pos->refund_fee */
      71           0 :       if (0 >
      72           0 :           TALER_amount_add (&refunded,
      73             :                             &refunded,
      74           0 :                             &pos->details.refund->refund_amount))
      75             :       {
      76           0 :         GNUNET_break (0);
      77           0 :         return GNUNET_SYSERR;
      78             :       }
      79           0 :       if (0 >
      80           0 :           TALER_amount_add (&spent,
      81             :                             &spent,
      82           0 :                             &pos->details.refund->refund_fee))
      83             :       {
      84           0 :         GNUNET_break (0);
      85           0 :         return GNUNET_SYSERR;
      86             :       }
      87           0 :       have_refund = true;
      88           0 :       break;
      89           0 :     case TALER_EXCHANGEDB_TT_OLD_COIN_RECOUP:
      90             :       /* refunded += pos->value */
      91           0 :       if (0 >
      92           0 :           TALER_amount_add (&refunded,
      93             :                             &refunded,
      94           0 :                             &pos->details.old_coin_recoup->value))
      95             :       {
      96           0 :         GNUNET_break (0);
      97           0 :         return GNUNET_SYSERR;
      98             :       }
      99           0 :       break;
     100           0 :     case TALER_EXCHANGEDB_TT_RECOUP:
     101             :       /* spent += pos->value */
     102           0 :       if (0 >
     103           0 :           TALER_amount_add (&spent,
     104             :                             &spent,
     105           0 :                             &pos->details.recoup->value))
     106             :       {
     107           0 :         GNUNET_break (0);
     108           0 :         return GNUNET_SYSERR;
     109             :       }
     110           0 :       break;
     111           0 :     case TALER_EXCHANGEDB_TT_RECOUP_REFRESH:
     112             :       /* spent += pos->value */
     113           0 :       if (0 >
     114           0 :           TALER_amount_add (&spent,
     115             :                             &spent,
     116           0 :                             &pos->details.recoup_refresh->value))
     117             :       {
     118           0 :         GNUNET_break (0);
     119           0 :         return GNUNET_SYSERR;
     120             :       }
     121           0 :       break;
     122           0 :     case TALER_EXCHANGEDB_TT_PURSE_DEPOSIT:
     123             :       /* spent += pos->amount_with_fee */
     124           0 :       if (0 >
     125           0 :           TALER_amount_add (&spent,
     126             :                             &spent,
     127           0 :                             &pos->details.purse_deposit->amount))
     128             :       {
     129           0 :         GNUNET_break (0);
     130           0 :         return GNUNET_SYSERR;
     131             :       }
     132           0 :       deposit_fee = pos->details.purse_deposit->deposit_fee;
     133           0 :       break;
     134             :     }
     135           0 :   }
     136           0 :   if (have_refund)
     137             :   {
     138             :     /* If we gave any refund, also discount ONE deposit fee */
     139           0 :     if (0 >
     140           0 :         TALER_amount_add (&refunded,
     141             :                           &refunded,
     142             :                           &deposit_fee))
     143             :     {
     144           0 :       GNUNET_break (0);
     145           0 :       return GNUNET_SYSERR;
     146             :     }
     147             :   }
     148             :   /* spent = spent - refunded */
     149           0 :   if (0 >
     150           0 :       TALER_amount_subtract (&spent,
     151             :                              &spent,
     152             :                              &refunded))
     153             :   {
     154           0 :     GNUNET_break (0);
     155           0 :     return GNUNET_SYSERR;
     156             :   }
     157           0 :   *ret = spent;
     158           0 :   return GNUNET_OK;
     159             : }