exchange

Base system with REST service to issue digital coins, run by the payment service provider
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enable_rules.c (2680B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2025 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 exchangedb/enable_rules.c
     18  * @brief Implementation of the enable_rules function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/taler_pq_lib.h"
     22 #include "exchange-database/enable_rules.h"
     23 #include "helper.h"
     24 
     25 
     26 enum GNUNET_GenericReturnValue
     27 TALER_EXCHANGEDB_enable_rules (
     28   struct TALER_EXCHANGEDB_PostgresContext *pg,
     29   const char *schema)
     30 {
     31   enum GNUNET_GenericReturnValue ret;
     32   char *sp;
     33 
     34   GNUNET_asprintf (&sp,
     35                    "SET search_path TO %s,exchange;",
     36                    schema);
     37   {
     38     struct GNUNET_PQ_ExecuteStatement es[] = {
     39       GNUNET_PQ_make_try_execute (sp),
     40       GNUNET_PQ_EXECUTE_STATEMENT_END
     41     };
     42     char *schemadash;
     43 
     44     if (GNUNET_OK !=
     45         GNUNET_PQ_exec_statements (pg->conn,
     46                                    es))
     47     {
     48       GNUNET_break (0);
     49       GNUNET_free (sp);
     50       return GNUNET_SYSERR;
     51     }
     52     GNUNET_asprintf (&schemadash,
     53                      "%s-",
     54                      schema);
     55     ret = GNUNET_PQ_run_sql (pg->conn,
     56                              schemadash);
     57     GNUNET_free (schemadash);
     58   }
     59   GNUNET_free (sp);
     60   if (GNUNET_OK == ret)
     61   {
     62     char *procfile;
     63 
     64     GNUNET_asprintf (&procfile,
     65                      "%s-procedures",
     66                      schema);
     67     ret = GNUNET_PQ_exec_sql (pg->conn,
     68                               procfile);
     69     /* $SCHEMA-procedures MAY not exist, so only check for hard error */
     70     GNUNET_break (GNUNET_SYSERR != ret);
     71     if (GNUNET_NO == ret)
     72       ret = GNUNET_OK;
     73     GNUNET_free (procfile);
     74   }
     75   {
     76     struct GNUNET_PQ_ExecuteStatement es_restore[] = {
     77       GNUNET_PQ_make_try_execute ("SET search_path TO exchange;"),
     78       GNUNET_PQ_EXECUTE_STATEMENT_END
     79     };
     80 
     81     /* This MUST succeed, otherwise we'll have a bad search_path
     82        and then anything could happen... */
     83     GNUNET_assert (GNUNET_OK ==
     84                    GNUNET_PQ_exec_statements (pg->conn,
     85                                               es_restore));
     86   }
     87   return ret;
     88 }