merchant

Merchant backend to process payments, run by merchants
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insert_spent_token.c (2995B)

      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 src/backenddb/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_pq_lib.h>
     23 #include "merchant-database/insert_spent_token.h"
     24 #include "helper.h"
     25 
     26 
     27 enum GNUNET_DB_QueryStatus
     28 TALER_MERCHANTDB_insert_spent_token (
     29   struct TALER_MERCHANTDB_PostgresContext *pg,
     30   const struct TALER_PrivateContractHashP *h_contract_terms,
     31   const struct TALER_TokenIssuePublicKeyHashP *h_issue_pub,
     32   const struct TALER_TokenUsePublicKeyP *use_pub,
     33   const struct TALER_TokenUseSignatureP *use_sig,
     34   const struct TALER_TokenIssueSignature *issue_sig)
     35 {
     36   struct GNUNET_PQ_QueryParam params[] = {
     37     GNUNET_PQ_query_param_auto_from_type (h_contract_terms),
     38     GNUNET_PQ_query_param_auto_from_type (h_issue_pub),
     39     GNUNET_PQ_query_param_auto_from_type (use_pub),
     40     GNUNET_PQ_query_param_auto_from_type (use_sig),
     41     GNUNET_PQ_query_param_unblinded_sig (issue_sig->signature),
     42     GNUNET_PQ_query_param_end
     43   };
     44   bool no_fam;
     45   bool conflict; /* used to signal double-spending */
     46   struct GNUNET_PQ_ResultSpec rs[] = {
     47     GNUNET_PQ_result_spec_bool ("out_no_family",
     48                                 &no_fam),
     49     GNUNET_PQ_result_spec_bool ("out_conflict",
     50                                 &conflict),
     51     GNUNET_PQ_result_spec_end
     52   };
     53   enum GNUNET_DB_QueryStatus qs;
     54 
     55   GNUNET_assert (NULL != pg->current_merchant_id);
     56   check_connection (pg);
     57   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     58               "Storing token spent with key %s\n",
     59               GNUNET_h2s (&h_issue_pub->hash));
     60   TMH_PQ_prepare_anon (pg,
     61                        "SELECT"
     62                        "  out_no_family"
     63                        " ,out_conflict"
     64                        "  FROM merchant_do_insert_spent_token"
     65                        "($1, $2, $3, $4, $5);");
     66   qs = GNUNET_PQ_eval_prepared_singleton_select (
     67     pg->conn,
     68     "",
     69     params,
     70     rs);
     71   if (qs < 0)
     72     return qs;
     73   // FIXME: return specific errors to caller
     74   if (no_fam)
     75   {
     76     GNUNET_break (0);
     77     return GNUNET_DB_STATUS_HARD_ERROR;
     78   }
     79   if (conflict)
     80   {
     81     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
     82                 "Client attempted to double-spend token\n");
     83     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
     84   }
     85   return qs;
     86 }