1 files changed, 84 insertions, 0 deletions
diff --git a/src/lib/exchange_api_common.h b/src/lib/exchange_api_common.h
new file mode 100644
index 000000000..9c6d45029
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+++ b/src/lib/exchange_api_common.h
@@ -0,0 +1,84 @@
+/*
+  This file is part of TALER
+  Copyright (C) 2015-2022 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 lib/exchange_api_common.h
+ * @brief common functions for the exchange API
+ * @author Christian Grothoff
+ */
+#ifndef EXCHANGE_API_COMMON_H
+#define EXCHANGE_API_COMMON_H
+
+#include "taler_json_lib.h"
+
+
+/**
+ * Check proof of a purse creation conflict.
+ *
+ * @param cpurse_sig conflicting signature (must
+ *        not match the signature from the proof)
+ * @param purse_pub the public key (must match
+ *        the signature from the proof)
+ * @param proof the proof to check
+ * @return #GNUNET_OK if the @a proof is OK for @a purse_pub and conflicts with @a purse_sig
+ */
+enum GNUNET_GenericReturnValue
+TALER_EXCHANGE_check_purse_create_conflict_ (
+  const struct TALER_PurseContractSignatureP *cpurse_sig,
+  const struct TALER_PurseContractPublicKeyP *purse_pub,
+  const json_t *proof);
+
+
+/**
+ * Check proof of a purse merge conflict.
+ *
+ * @param cmerge_sig conflicting signature (must
+ *        not match the signature from the proof)
+ * @param merge_pub the public key (must match
+ *        the signature from the proof)
+ * @param exchange_url the base URL of this exchange
+ * @param proof the proof to check
+ * @return #GNUNET_OK if the @a proof is OK for @a purse_pub and conflicts with @a purse_sig
+ */
+enum GNUNET_GenericReturnValue
+TALER_EXCHANGE_check_purse_merge_conflict_ (
+  const struct TALER_PurseMergeSignatureP *cmerge_sig,
+  const struct TALER_PurseMergePublicKeyP *merge_pub,
+  const struct TALER_PurseContractPublicKeyP *purse_pub,
+  const char *exchange_url,
+  const json_t *proof);
+
+
+/**
+ * Check proof of a contract conflict.
+ *
+ * DESIGN-FIXME: this 'proof' doesn't really proof a conflict!
+ *
+ * @param ccontract_sig conflicting signature (must
+ *        not match the signature from the proof)
+ * @param purse_pub public key of the purse
+ * @param exchange_url the base URL of this exchange
+ * @param proof the proof to check
+ * @return #GNUNET_OK if the @a proof is OK for @a purse_pub and conflicts with @a purse_sig
+ */
+enum GNUNET_GenericReturnValue
+TALER_EXCHANGE_check_purse_econtract_conflict_ (
+  const struct TALER_PurseContractSignatureP *ccontract_sig,
+  const struct TALER_PurseContractPublicKeyP *purse_pub,
+  const json_t *proof);
+
+
+#endif