merchant

Merchant backend to process payments, run by merchants
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contract_version_parse.c (2286B)

      1 /*
      2   This file is part of TALER
      3   (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 Lesser 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/util/contract_version_parse.c
     18  * @brief parser for the contract version
     19  * @author Christian Grothoff
     20  */
     21 #include "platform.h"
     22 #include <string.h>
     23 #include "taler/taler_merchant_util.h"
     24 
     25 /**
     26  * Parse contract version of given JSON contract terms.
     27  *
     28  * @param cls closure, unused parameter
     29  * @param root the JSON object representing data
     30  * @param[out] spec where to write the data
     31  * @return #GNUNET_OK upon successful parsing; #GNUNET_SYSERR upon error
     32  */
     33 static enum GNUNET_GenericReturnValue
     34 parse_contract_version (void *cls,
     35                         json_t *root,
     36                         struct GNUNET_JSON_Specification *spec)
     37 {
     38   enum TALER_MERCHANT_ContractVersion *res
     39     = (enum TALER_MERCHANT_ContractVersion *) spec->ptr;
     40 
     41   (void) cls;
     42   if (json_is_integer (root))
     43   {
     44     json_int_t version = json_integer_value (root);
     45 
     46     switch (version)
     47     {
     48     case 0:
     49       *res = TALER_MERCHANT_CONTRACT_VERSION_0;
     50       return GNUNET_OK;
     51     case 1:
     52       *res = TALER_MERCHANT_CONTRACT_VERSION_1;
     53       return GNUNET_OK;
     54     }
     55 
     56     GNUNET_break_op (0);
     57     return GNUNET_SYSERR;
     58   }
     59 
     60   if (json_is_null (root))
     61   {
     62     *res = TALER_MERCHANT_CONTRACT_VERSION_0;
     63     return GNUNET_OK;
     64   }
     65 
     66   GNUNET_break_op (0);
     67   return GNUNET_SYSERR;
     68 }
     69 
     70 
     71 struct GNUNET_JSON_Specification
     72 TALER_MERCHANT_spec_contract_version (
     73   const char *name,
     74   enum TALER_MERCHANT_ContractVersion *version)
     75 {
     76   struct GNUNET_JSON_Specification ret = {
     77     .parser = &parse_contract_version,
     78     .field = name,
     79     .ptr = version
     80   };
     81 
     82   *version = TALER_MERCHANT_CONTRACT_VERSION_0;
     83   return ret;
     84 }