exchange

Base system with REST service to issue digital coins, run by the payment service provider
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start.c (2307B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2026 Taler Systems SA
      4 
      5    TALER is free software; you can redistribute it and/or modify it under the
      6    terms of the GNU General Public License as published by the Free Software
      7    Foundation; either version 3, or (at your option) any later version.
      8 
      9    TALER is distributed in the hope that it will be useful, but WITHOUT ANY
     10    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
     11    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License along with
     14    TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
     15  */
     16 /**
     17  * @file src/auditordb/start.c
     18  * @brief Implementation of the start, commit and rollback functions for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_pq_lib.h"
     22 #include "auditor-database/start.h"
     23 #include "auditor-database/preflight.h"
     24 #include "pg_helper.h"
     25 
     26 
     27 enum GNUNET_GenericReturnValue
     28 TALER_AUDITORDB_start (struct TALER_AUDITORDB_PostgresContext *pg)
     29 {
     30   struct GNUNET_PQ_ExecuteStatement es[] = {
     31     GNUNET_PQ_make_execute ("START TRANSACTION ISOLATION LEVEL SERIALIZABLE"),
     32     GNUNET_PQ_EXECUTE_STATEMENT_END
     33   };
     34 
     35   GNUNET_break (GNUNET_OK ==
     36                 TALER_AUDITORDB_preflight (pg));
     37   if (GNUNET_OK !=
     38       GNUNET_PQ_exec_statements (pg->conn,
     39                                  es))
     40   {
     41     TALER_LOG_ERROR ("Failed to start transaction\n");
     42     GNUNET_break (0);
     43     return GNUNET_SYSERR;
     44   }
     45   return GNUNET_OK;
     46 }
     47 
     48 
     49 void
     50 TALER_AUDITORDB_rollback (struct TALER_AUDITORDB_PostgresContext *pg)
     51 {
     52   struct GNUNET_PQ_ExecuteStatement es[] = {
     53     GNUNET_PQ_make_execute ("ROLLBACK"),
     54     GNUNET_PQ_EXECUTE_STATEMENT_END
     55   };
     56 
     57   GNUNET_break (GNUNET_OK ==
     58                 GNUNET_PQ_exec_statements (pg->conn,
     59                                            es));
     60 }
     61 
     62 
     63 enum GNUNET_DB_QueryStatus
     64 TALER_AUDITORDB_commit (struct TALER_AUDITORDB_PostgresContext *pg)
     65 {
     66   struct GNUNET_PQ_QueryParam params[] = {
     67     GNUNET_PQ_query_param_end
     68   };
     69 
     70   PREPARE (pg,
     71            "do_commit",
     72            "COMMIT");
     73   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
     74                                              "do_commit",
     75                                              params);
     76 }