merchant

Merchant backend to process payments, run by merchants
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pg_insert_spent_token.c (2928B)

      1 /*
      2    This file is part of TALER
      3    Copyright (C) 2024 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 backenddb/pg_insert_spent_token.c
     18  * @brief Implementation of the insert_spent_token function for Postgres
     19  * @author Christian Blättler
     20  */
     21 #include "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_insert_spent_token.h"
     26 #include "pg_helper.h"
     27 
     28 
     29 enum GNUNET_DB_QueryStatus
     30 TMH_PG_insert_spent_token (
     31   void *cls,
     32   const struct TALER_PrivateContractHashP *h_contract_terms,
     33   const struct TALER_TokenIssuePublicKeyHashP *h_issue_pub,
     34   const struct TALER_TokenUsePublicKeyP *use_pub,
     35   const struct TALER_TokenUseSignatureP *use_sig,
     36   const struct TALER_TokenIssueSignature *issue_sig)
     37 {
     38   struct PostgresClosure *pg = cls;
     39   struct GNUNET_PQ_QueryParam params[] = {
     40     GNUNET_PQ_query_param_auto_from_type (h_contract_terms),
     41     GNUNET_PQ_query_param_auto_from_type (h_issue_pub),
     42     GNUNET_PQ_query_param_auto_from_type (use_pub),
     43     GNUNET_PQ_query_param_auto_from_type (use_sig),
     44     GNUNET_PQ_query_param_unblinded_sig (issue_sig->signature),
     45     GNUNET_PQ_query_param_end
     46   };
     47   bool no_fam;
     48   bool conflict; /* used to signal double-spending */
     49   struct GNUNET_PQ_ResultSpec rs[] = {
     50     GNUNET_PQ_result_spec_bool ("out_no_family",
     51                                 &no_fam),
     52     GNUNET_PQ_result_spec_bool ("out_conflict",
     53                                 &conflict),
     54     GNUNET_PQ_result_spec_end
     55   };
     56   enum GNUNET_DB_QueryStatus qs;
     57 
     58   check_connection (pg);
     59   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     60               "Storing token spent with key %s\n",
     61               GNUNET_h2s (&h_issue_pub->hash));
     62   PREPARE (pg,
     63            "spent_token_insert",
     64            "SELECT"
     65            "  out_no_family"
     66            " ,out_conflict"
     67            "  FROM merchant_do_insert_spent_token"
     68            "($1, $2, $3, $4, $5);");
     69   qs = GNUNET_PQ_eval_prepared_singleton_select (
     70     pg->conn,
     71     "spent_token_insert",
     72     params,
     73     rs);
     74   if (qs < 0)
     75     return qs;
     76   if (no_fam)
     77   {
     78     GNUNET_break (0);
     79     return GNUNET_DB_STATUS_HARD_ERROR;
     80   }
     81   if (conflict)
     82   {
     83     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     84                 "Client attempted to double-spend token\n");
     85     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     86   }
     87   return qs;
     88 }