1 files changed, 64 insertions, 0 deletions
diff --git a/src/exchangedb/pg_preflight.c b/src/exchangedb/pg_preflight.c
new file mode 100644
index 000000000..4925db512
--- /dev/null
+++ b/src/exchangedb/pg_preflight.c
@@ -0,0 +1,64 @@
+/*
+   This file is part of TALER
+   Copyright (C) 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 exchangedb/pg_prefligth.c
+ * @brief Implementation of the prefligth function for Postgres
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_error_codes.h"
+#include "taler_dbevents.h"
+#include "taler_pq_lib.h"
+#include "pg_preflight.h"
+#include "pg_helper.h"
+
+
+enum GNUNET_GenericReturnValue
+TEH_PG_preflight (void *cls)
+{
+  struct PostgresClosure *pg = cls;
+  struct GNUNET_PQ_ExecuteStatement es[] = {
+    GNUNET_PQ_make_execute ("ROLLBACK"),
+    GNUNET_PQ_EXECUTE_STATEMENT_END
+  };
+
+  if (! pg->init)
+  {
+    if (GNUNET_OK !=
+
+        internal_setup (pg,
+                        false))
+      return GNUNET_SYSERR;
+  }
+  if (NULL == pg->transaction_name)
+    return GNUNET_OK; /* all good */
+  if (GNUNET_OK ==
+      GNUNET_PQ_exec_statements (pg->conn,
+                                 es))
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "BUG: Preflight check rolled back transaction `%s'!\n",
+                pg->transaction_name);
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "BUG: Preflight check failed to rollback transaction `%s'!\n",
+                pg->transaction_name);
+  }
+  pg->transaction_name = NULL;
+  return GNUNET_NO;
+}