Line data    Source code

       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_used_token.c
      18              :  * @brief Implementation of the insert_used_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_used_token.h"
      24              : #include "helper.h"
      25              : 
      26              : 
      27              : enum GNUNET_DB_QueryStatus
      28            8 : TALER_MERCHANTDB_insert_used_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              :   bool *no_family)
      36              : {
      37            8 :   struct GNUNET_PQ_QueryParam params[] = {
      38            8 :     GNUNET_PQ_query_param_auto_from_type (h_contract_terms),
      39            8 :     GNUNET_PQ_query_param_auto_from_type (h_issue_pub),
      40            8 :     GNUNET_PQ_query_param_auto_from_type (use_pub),
      41            8 :     GNUNET_PQ_query_param_auto_from_type (use_sig),
      42            8 :     GNUNET_PQ_query_param_unblinded_sig (issue_sig->signature),
      43              :     GNUNET_PQ_query_param_end
      44              :   };
      45            8 :   bool no_fam = false;
      46            8 :   bool conflict = false; /* used to signal double-spending */
      47            8 :   struct GNUNET_PQ_ResultSpec rs[] = {
      48            8 :     GNUNET_PQ_result_spec_bool ("out_no_family",
      49              :                                 &no_fam),
      50            8 :     GNUNET_PQ_result_spec_bool ("out_conflict",
      51              :                                 &conflict),
      52              :     GNUNET_PQ_result_spec_end
      53              :   };
      54              :   enum GNUNET_DB_QueryStatus qs;
      55              : 
      56            8 :   GNUNET_assert (NULL != pg->current_merchant_id);
      57            8 :   GNUNET_log (GNUNET_ERROR_TYPE_INFO,
      58              :               "Storing token spent with key %s\n",
      59              :               GNUNET_h2s (&h_issue_pub->hash));
      60            8 :   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            8 :   qs = GNUNET_PQ_eval_prepared_singleton_select (
      67              :     pg->conn,
      68              :     "",
      69              :     params,
      70              :     rs);
      71            8 :   *no_family = false;
      72            8 :   if (qs <= 0)
      73            0 :     return qs;
      74            8 :   if (no_fam)
      75              :   {
      76              :     /* The token family (key) was deleted after the order was created;
      77              :        this is a client-visible conflict, not an internal failure. */
      78            1 :     *no_family = true;
      79            1 :     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
      80              :   }
      81            7 :   if (conflict)
      82              :   {
      83            3 :     GNUNET_log (GNUNET_ERROR_TYPE_INFO,
      84              :                 "Client attempted to double-spend token\n");
      85            3 :     return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS;
      86              :   }
      87            4 :   return qs;
      88              : }