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Base system with REST service to issue digital coins, run by the payment service provider
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pg_get_extension_manifest.c (2399B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2022 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/pg_get_extension_manifest.c
     18  * @brief Implementation of the get_extension_manifest function for Postgres
     19  * @author Christian Grothoff
     20  */
     21 #include "taler/platform.h"
     22 #include "taler/taler_error_codes.h"
     23 #include "taler/taler_dbevents.h"
     24 #include "taler/taler_pq_lib.h"
     25 #include "pg_get_extension_manifest.h"
     26 #include "pg_helper.h"
     27 
     28 /**
     29  * Function called to get the manifest of an extension
     30  * (age-restriction, policy_extension_...)
     31  *
     32  * @param cls the @e cls of this struct with the plugin-specific state
     33  * @param extension_name the name of the extension
     34  * @param[out] manifest JSON object of the manifest as string
     35  * @return transaction status code
     36  */
     37 enum GNUNET_DB_QueryStatus
     38 TEH_PG_get_extension_manifest (void *cls,
     39                                const char *extension_name,
     40                                char **manifest)
     41 {
     42   struct PostgresClosure *pg = cls;
     43   struct GNUNET_PQ_QueryParam params[] = {
     44     GNUNET_PQ_query_param_string (extension_name),
     45     GNUNET_PQ_query_param_end
     46   };
     47   bool is_null;
     48   struct GNUNET_PQ_ResultSpec rs[] = {
     49     GNUNET_PQ_result_spec_allow_null (
     50       GNUNET_PQ_result_spec_string ("manifest",
     51                                     manifest),
     52       &is_null),
     53     GNUNET_PQ_result_spec_end
     54   };
     55 
     56   *manifest = NULL;
     57   PREPARE (pg,
     58            "get_extension_manifest",
     59            "SELECT"
     60            " manifest"
     61            " FROM extensions"
     62            " WHERE name=$1;");
     63   return GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
     64                                                    "get_extension_manifest",
     65                                                    params,
     66                                                    rs);
     67 }