get_wire_hash_for_contract.c (2998B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2023, 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 exchangedb/get_wire_hash_for_contract.c 18 * @brief Implementation of the get_wire_hash_for_contract function for Postgres 19 * @author Özgür Kesim 20 */ 21 #include "exchangedb_lib.h" 22 #include "taler/taler_pq_lib.h" 23 #include "exchange-database/get_wire_hash_for_contract.h" 24 #include "helper.h" 25 26 27 enum GNUNET_DB_QueryStatus 28 TALER_EXCHANGEDB_get_wire_hash_for_contract ( 29 struct TALER_EXCHANGEDB_PostgresContext *pg, 30 const struct TALER_MerchantPublicKeyP *merchant_pub, 31 const struct TALER_PrivateContractHashP *h_contract_terms, 32 struct TALER_MerchantWireHashP *h_wire) 33 { 34 enum GNUNET_DB_QueryStatus qs; 35 struct GNUNET_PQ_QueryParam params[] = { 36 GNUNET_PQ_query_param_auto_from_type (merchant_pub), 37 GNUNET_PQ_query_param_auto_from_type (h_contract_terms), 38 GNUNET_PQ_query_param_end 39 }; 40 struct TALER_FullPayto payto_uri; 41 struct TALER_WireSaltP wire_salt; 42 struct GNUNET_PQ_ResultSpec rs[] = { 43 GNUNET_PQ_result_spec_auto_from_type ("wire_salt", 44 &wire_salt), 45 GNUNET_PQ_result_spec_string ("payto_uri", 46 &payto_uri.full_payto), 47 GNUNET_PQ_result_spec_end 48 }; 49 50 /* check if the necessary records exist and get them */ 51 PREPARE (pg, 52 "get_wire_hash_for_contract", 53 "SELECT" 54 " bdep.wire_salt" 55 " ,wt.payto_uri" 56 " FROM coin_deposits" 57 " JOIN batch_deposits bdep" 58 " USING (batch_deposit_serial_id)" 59 " JOIN wire_targets wt" 60 " USING (wire_target_h_payto)" 61 " WHERE bdep.merchant_pub=$1" 62 " AND bdep.h_contract_terms=$2"); 63 /* NOTE: above query might be more efficient if we computed the shard 64 from the merchant_pub and included that in the query */ 65 qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 66 "get_wire_hash_for_contract", 67 params, 68 rs); 69 if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs) 70 { 71 TALER_merchant_wire_signature_hash (payto_uri, 72 &wire_salt, 73 h_wire); 74 GNUNET_PQ_cleanup_result (rs); 75 } 76 return qs; 77 }