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authorChristian Grothoff <christian@grothoff.org>2020-01-16 22:40:12 +0100
committerChristian Grothoff <christian@grothoff.org>2020-01-16 22:40:12 +0100
commit0305cf5f9eb904e7a3ab3e8d39f4974a92a9a0b3 (patch)
tree8a5d839bb3cfb5e96b430ff6d1eeeed653cc4a6b /src/exchangedb/exchangedb_transactions.c
parent0a415262daa93c96a9305df11a6573b49976a8cc (diff)
downloadexchange-0305cf5f9eb904e7a3ab3e8d39f4974a92a9a0b3.tar.gz
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move function to libtalerexchangedb, as planned
Diffstat (limited to 'src/exchangedb/exchangedb_transactions.c')
-rw-r--r--src/exchangedb/exchangedb_transactions.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/src/exchangedb/exchangedb_transactions.c b/src/exchangedb/exchangedb_transactions.c
new file mode 100644
index 00000000..2891f0ad
--- /dev/null
+++ b/src/exchangedb/exchangedb_transactions.c
@@ -0,0 +1,142 @@
+/*
+ This file is part of TALER
+ Copyright (C) 2017-2020 Taler Systems SA
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file exchangedb/exchangedb_transactions.c
+ * @brief Logic to compute transaction totals of a transaction list for a coin
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_exchangedb_lib.h"
+
+
+/**
+ * Calculate the total value of all transactions performed.
+ * Stores @a off plus the cost of all transactions in @a tl
+ * in @a ret.
+ *
+ * @param tl transaction list to process
+ * @param off offset to use as the starting value
+ * @param[out] ret where the resulting total is to be stored
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on errors
+ */
+int
+TALER_EXCHANGEDB_calculate_transaction_list_totals (struct
+ TALER_EXCHANGEDB_TransactionList
+ *tl,
+ const struct
+ TALER_Amount *off,
+ struct TALER_Amount *ret)
+{
+ struct TALER_Amount spent = *off;
+ struct TALER_Amount refunded;
+
+ GNUNET_assert (GNUNET_OK ==
+ TALER_amount_get_zero (spent.currency,
+ &refunded));
+ for (struct TALER_EXCHANGEDB_TransactionList *pos = tl; NULL != pos; pos =
+ pos->next)
+ {
+ switch (pos->type)
+ {
+ case TALER_EXCHANGEDB_TT_DEPOSIT:
+ /* spent += pos->amount_with_fee */
+ if (GNUNET_OK !=
+ TALER_amount_add (&spent,
+ &spent,
+ &pos->details.deposit->amount_with_fee))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ case TALER_EXCHANGEDB_TT_REFRESH_MELT:
+ /* spent += pos->amount_with_fee */
+ if (GNUNET_OK !=
+ TALER_amount_add (&spent,
+ &spent,
+ &pos->details.melt->session.amount_with_fee))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ case TALER_EXCHANGEDB_TT_REFUND:
+ /* refunded += pos->refund_amount - pos->refund_fee */
+ if (GNUNET_OK !=
+ TALER_amount_add (&refunded,
+ &refunded,
+ &pos->details.refund->refund_amount))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ if (GNUNET_OK !=
+ TALER_amount_subtract (&refunded,
+ &refunded,
+ &pos->details.refund->refund_fee))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ case TALER_EXCHANGEDB_TT_OLD_COIN_PAYBACK:
+ /* refunded += pos->value */
+ if (GNUNET_OK !=
+ TALER_amount_add (&refunded,
+ &refunded,
+ &pos->details.old_coin_payback->value))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ case TALER_EXCHANGEDB_TT_PAYBACK:
+ /* spent += pos->value */
+ if (GNUNET_OK !=
+ TALER_amount_add (&spent,
+ &spent,
+ &pos->details.payback->value))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ case TALER_EXCHANGEDB_TT_PAYBACK_REFRESH:
+ /* spent += pos->value */
+ if (GNUNET_OK !=
+ TALER_amount_add (&spent,
+ &spent,
+ &pos->details.payback_refresh->value))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ break;
+ }
+ }
+ /* spent = spent - refunded */
+ if (GNUNET_SYSERR ==
+ TALER_amount_subtract (&spent,
+ &spent,
+ &refunded))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+
+ *ret = spent;
+ return GNUNET_OK;
+}