insert_spent_token.c (3121B)
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_error_codes.h> 23 #include <taler/taler_dbevents.h> 24 #include <taler/taler_pq_lib.h> 25 #include "merchant-database/insert_spent_token.h" 26 #include "helper.h" 27 28 29 enum GNUNET_DB_QueryStatus 30 TALER_MERCHANTDB_insert_spent_token (struct TALER_MERCHANTDB_PostgresContext *pg, 31 const struct TALER_PrivateContractHashP *h_contract_terms, 32 const struct TALER_TokenIssuePublicKeyHashP *h_issue_pub, 33 const struct TALER_TokenUsePublicKeyP *use_pub, 34 const struct TALER_TokenUseSignatureP *use_sig, 35 const struct TALER_TokenIssueSignature *issue_sig) 36 { 37 struct GNUNET_PQ_QueryParam params[] = { 38 GNUNET_PQ_query_param_auto_from_type (h_contract_terms), 39 GNUNET_PQ_query_param_auto_from_type (h_issue_pub), 40 GNUNET_PQ_query_param_auto_from_type (use_pub), 41 GNUNET_PQ_query_param_auto_from_type (use_sig), 42 GNUNET_PQ_query_param_unblinded_sig (issue_sig->signature), 43 GNUNET_PQ_query_param_end 44 }; 45 bool no_fam; 46 bool conflict; /* used to signal double-spending */ 47 struct GNUNET_PQ_ResultSpec rs[] = { 48 GNUNET_PQ_result_spec_bool ("out_no_family", 49 &no_fam), 50 GNUNET_PQ_result_spec_bool ("out_conflict", 51 &conflict), 52 GNUNET_PQ_result_spec_end 53 }; 54 enum GNUNET_DB_QueryStatus qs; 55 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 PREPARE (pg, 61 "spent_token_insert", 62 "SELECT" 63 " out_no_family" 64 " ,out_conflict" 65 " FROM merchant_do_insert_spent_token" 66 "($1, $2, $3, $4, $5);"); 67 qs = GNUNET_PQ_eval_prepared_singleton_select ( 68 pg->conn, 69 "spent_token_insert", 70 params, 71 rs); 72 if (qs < 0) 73 return qs; 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 }