store used tokens in database and prevent double using a token

1 files changed, 70 insertions, 0 deletions

diff --git a/src/backenddb/pg_insert_spent_token.c b/src/backenddb/pg_insert_spent_token.c
new file mode 100644
index 00000000..466b0b11
--- /dev/null
+++ b/src/backenddb/pg_insert_spent_token.c
@@ -0,0 +1,70 @@
+/*
+   This file is part of TALER
+   Copyright (C) 2024 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 backenddb/pg_insert_spent_token.c
+ * @brief Implementation of the insert_spent_token function for Postgres
+ * @author Christian Blättler
+ */
+#ifndef PG_INSERT_SPENT_TOKEN_H
+#define PG_INSERT_SPENT_TOKEN_H
+
+#include "platform.h"
+#include <taler/taler_error_codes.h>
+#include <taler/taler_dbevents.h>
+#include <taler/taler_pq_lib.h>
+#include "pg_insert_spent_token.h"
+#include "pg_helper.h"
+
+enum GNUNET_DB_QueryStatus
+TMH_PG_insert_spent_token (void *cls,
+                           const struct TALER_PrivateContractHashP *h_contract_terms,
+                           const struct TALER_TokenIssuePublicKeyHashP *h_issue_pub,
+                           const struct TALER_TokenUsePublicKeyP *use_pub,
+                           const struct TALER_TokenUseSignatureP *use_sig,
+                           const struct TALER_TokenIssueSignatureP *issue_sig)
+{
+  struct PostgresClosure *pg = cls;
+
+  struct GNUNET_PQ_QueryParam params[] = {
+    GNUNET_PQ_query_param_auto_from_type (h_issue_pub),
+    GNUNET_PQ_query_param_auto_from_type (h_contract_terms),
+    GNUNET_PQ_query_param_auto_from_type (use_pub),
+    GNUNET_PQ_query_param_auto_from_type (use_sig),
+    GNUNET_PQ_query_param_unblinded_sig (issue_sig->signature),
+    GNUNET_PQ_query_param_end
+  };
+
+  check_connection (pg);
+  PREPARE (pg,
+           "spent_token_insert",
+           "INSERT INTO merchant_spent_tokens"
+           "(merchant_serial" /* TODO: Remove merchant_serial field from the db, it's already given by token_family.merchant_serial. */
+           ",token_family_key_serial"
+           ",h_contract_terms"
+           ",token_pub"
+           ",token_sig"
+           ",blind_sig)"
+           " SELECT merchant_serial, token_family_key_serial, $2, $3, $4, $5"
+           " FROM merchant_token_families"
+           " JOIN merchant_token_family_keys"
+           "   USING (token_family_serial)"
+           " WHERE h_pub = $1");
+  return GNUNET_PQ_eval_prepared_non_select (pg->conn,
+                                             "spent_token_insert",
+                                             params);
+}
+
+#endif
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