insert_used_token.c (3129B)
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 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 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 = false; 46 bool conflict = false; /* 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 GNUNET_assert (NULL != pg->current_merchant_id); 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 *no_family = false; 72 if (qs <= 0) 73 return qs; 74 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 *no_family = true; 79 return GNUNET_DB_STATUS_SUCCESS_NO_RESULTS; 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 }