exchange

Base system with REST service to issue digital coins, run by the payment service provider
Log | Files | Refs | Submodules | README | LICENSE

start.c (2509B)

      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                        const char *transaction_name)
     30 {
     31   struct GNUNET_PQ_ExecuteStatement es[] = {
     32     GNUNET_PQ_make_execute ("START TRANSACTION ISOLATION LEVEL SERIALIZABLE"),
     33     GNUNET_PQ_EXECUTE_STATEMENT_END
     34   };
     35 
     36   GNUNET_assert (NULL != transaction_name);
     37   GNUNET_break (GNUNET_OK ==
     38                 TALER_AUDITORDB_preflight (pg));
     39   if (GNUNET_OK !=
     40       GNUNET_PQ_exec_statements (pg->conn,
     41                                  es))
     42   {
     43     TALER_LOG_ERROR ("Failed to start transaction\n");
     44     GNUNET_break (0);
     45     return GNUNET_SYSERR;
     46   }
     47   pg->transaction_name = transaction_name;
     48   return GNUNET_OK;
     49 }
     50 
     51 
     52 void
     53 TALER_AUDITORDB_rollback (struct TALER_AUDITORDB_PostgresContext *pg)
     54 {
     55   struct GNUNET_PQ_ExecuteStatement es[] = {
     56     GNUNET_PQ_make_execute ("ROLLBACK"),
     57     GNUNET_PQ_EXECUTE_STATEMENT_END
     58   };
     59 
     60   GNUNET_break (GNUNET_OK ==
     61                 GNUNET_PQ_exec_statements (pg->conn,
     62                                            es));
     63   pg->transaction_name = NULL;
     64 }
     65 
     66 
     67 enum GNUNET_DB_QueryStatus
     68 TALER_AUDITORDB_commit (struct TALER_AUDITORDB_PostgresContext *pg)
     69 {
     70   struct GNUNET_PQ_QueryParam params[] = {
     71     GNUNET_PQ_query_param_end
     72   };
     73 
     74   PREPARE (pg,
     75            "do_commit",
     76            "COMMIT");
     77   pg->transaction_name = NULL;
     78   return GNUNET_PQ_eval_prepared_non_select (pg->conn,
     79                                              "do_commit",
     80                                              params);
     81 }