1 files changed, 41 insertions, 0 deletions
diff --git a/src/exchange-lib/exchange_api_common.h b/src/exchange-lib/exchange_api_common.h
new file mode 100644
index 000000000..2a521ceb2
--- /dev/null
+++ b/src/exchange-lib/exchange_api_common.h
@@ -0,0 +1,41 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2015 GNUnet e.V.
+
+  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, If not, see
+  <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file exchange-lib/exchange_api_common.h
+ * @brief common functions for the exchange API
+ * @author Christian Grothoff
+ */
+#include <jansson.h>
+#include <gnunet/gnunet_util_lib.h>
+#include "taler_exchange_service.h"
+
+/**
+ * Verify a coins transaction history as returned by the exchange.
+ *
+ * @param currency expected currency for the coin
+ * @param coin_pub public key of the coin
+ * @param history history of the coin in json encoding
+ * @param[out] total how much of the coin has been spent according to @a history
+ * @return #GNUNET_OK if @a history is valid, #GNUNET_SYSERR if not
+ */
+int
+TALER_EXCHANGE_verify_coin_history_ (const char *currency,
+                                     const struct TALER_CoinSpendPublicKeyP *coin_pub,
+                                     json_t *history,
+                                     struct TALER_Amount *total);
+
+/* end of exchange_api_common.h */