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 "exchange-database/free_coin_transaction_list.h"
22 :
23 :
24 : enum GNUNET_GenericReturnValue
25 0 : TALER_EXCHANGEDB_calculate_transaction_list_totals (
26 : struct TALER_EXCHANGEDB_TransactionList *tl,
27 : const struct TALER_Amount *off,
28 : struct TALER_Amount *ret)
29 : {
30 0 : struct TALER_Amount spent = *off;
31 : struct TALER_Amount refunded;
32 : struct TALER_Amount deposit_fee;
33 : bool have_refund;
34 :
35 0 : GNUNET_assert (GNUNET_OK ==
36 : TALER_amount_set_zero (spent.currency,
37 : &refunded));
38 0 : have_refund = false;
39 0 : for (struct TALER_EXCHANGEDB_TransactionList *pos = tl;
40 0 : NULL != pos;
41 0 : pos = pos->next)
42 : {
43 0 : switch (pos->type)
44 : {
45 0 : case TALER_EXCHANGEDB_TT_DEPOSIT:
46 : /* spent += pos->amount_with_fee */
47 0 : if (0 >
48 0 : TALER_amount_add (&spent,
49 : &spent,
50 0 : &pos->details.deposit->amount_with_fee))
51 : {
52 0 : GNUNET_break (0);
53 0 : return GNUNET_SYSERR;
54 : }
55 0 : deposit_fee = pos->details.deposit->deposit_fee;
56 0 : break;
57 0 : case TALER_EXCHANGEDB_TT_MELT:
58 : /* spent += pos->amount_with_fee */
59 0 : if (0 >
60 0 : TALER_amount_add (&spent,
61 : &spent,
62 0 : &pos->details.melt->amount_with_fee))
63 : {
64 0 : GNUNET_break (0);
65 0 : return GNUNET_SYSERR;
66 : }
67 0 : break;
68 0 : case TALER_EXCHANGEDB_TT_REFUND:
69 : /* refunded += pos->refund_amount - pos->refund_fee */
70 0 : if (0 >
71 0 : TALER_amount_add (&refunded,
72 : &refunded,
73 0 : &pos->details.refund->refund_amount))
74 : {
75 0 : GNUNET_break (0);
76 0 : return GNUNET_SYSERR;
77 : }
78 0 : if (0 >
79 0 : TALER_amount_add (&spent,
80 : &spent,
81 0 : &pos->details.refund->refund_fee))
82 : {
83 0 : GNUNET_break (0);
84 0 : return GNUNET_SYSERR;
85 : }
86 0 : have_refund = true;
87 0 : break;
88 0 : case TALER_EXCHANGEDB_TT_RECOUP_REFRESH_RECEIVER:
89 : /* refunded += pos->value */
90 0 : if (0 >
91 0 : TALER_amount_add (&refunded,
92 : &refunded,
93 0 : &pos->details.old_coin_recoup->value))
94 : {
95 0 : GNUNET_break (0);
96 0 : return GNUNET_SYSERR;
97 : }
98 0 : break;
99 0 : case TALER_EXCHANGEDB_TT_RECOUP_WITHDRAW:
100 : /* spent += pos->value */
101 0 : if (0 >
102 0 : TALER_amount_add (&spent,
103 : &spent,
104 0 : &pos->details.recoup->value))
105 : {
106 0 : GNUNET_break (0);
107 0 : return GNUNET_SYSERR;
108 : }
109 0 : break;
110 0 : case TALER_EXCHANGEDB_TT_RECOUP_REFRESH:
111 : /* spent += pos->value */
112 0 : if (0 >
113 0 : TALER_amount_add (&spent,
114 : &spent,
115 0 : &pos->details.recoup_refresh->value))
116 : {
117 0 : GNUNET_break (0);
118 0 : return GNUNET_SYSERR;
119 : }
120 0 : break;
121 0 : case TALER_EXCHANGEDB_TT_PURSE_DEPOSIT:
122 : /* spent += pos->amount_with_fee */
123 0 : if (0 >
124 0 : TALER_amount_add (&spent,
125 : &spent,
126 0 : &pos->details.purse_deposit->amount))
127 : {
128 0 : GNUNET_break (0);
129 0 : return GNUNET_SYSERR;
130 : }
131 0 : deposit_fee = pos->details.purse_deposit->deposit_fee;
132 0 : break;
133 0 : case TALER_EXCHANGEDB_TT_PURSE_REFUND:
134 : /* refunded += pos->refund_amount - pos->refund_fee */
135 0 : if (0 >
136 0 : TALER_amount_add (&refunded,
137 : &refunded,
138 0 : &pos->details.purse_refund->refund_amount))
139 : {
140 0 : GNUNET_break (0);
141 0 : return GNUNET_SYSERR;
142 : }
143 0 : if (0 >
144 0 : TALER_amount_add (&spent,
145 : &spent,
146 0 : &pos->details.purse_refund->refund_fee))
147 : {
148 0 : GNUNET_break (0);
149 0 : return GNUNET_SYSERR;
150 : }
151 0 : have_refund = true;
152 0 : break;
153 0 : case TALER_EXCHANGEDB_TT_RESERVE_OPEN:
154 : /* spent += pos->amount_with_fee */
155 0 : if (0 >
156 0 : TALER_amount_add (&spent,
157 : &spent,
158 0 : &pos->details.reserve_open->coin_contribution))
159 : {
160 0 : GNUNET_break (0);
161 0 : return GNUNET_SYSERR;
162 : }
163 0 : break;
164 : }
165 : }
166 0 : if (have_refund)
167 : {
168 : /* If we gave any refund, also discount ONE deposit fee */
169 0 : if (0 >
170 0 : TALER_amount_add (&refunded,
171 : &refunded,
172 : &deposit_fee))
173 : {
174 0 : GNUNET_break (0);
175 0 : return GNUNET_SYSERR;
176 : }
177 : }
178 : /* spent = spent - refunded */
179 0 : if (0 >
180 0 : TALER_amount_subtract (&spent,
181 : &spent,
182 : &refunded))
183 : {
184 0 : GNUNET_break (0);
185 0 : return GNUNET_SYSERR;
186 : }
187 0 : *ret = spent;
188 0 : return GNUNET_OK;
189 : }
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