check_transfer_exists.c (2274B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2023 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/check_transfer_exists.c 18 * @brief Implementation of the check_transfer_exists function for Postgres 19 * @author Iván Ávalos 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/check_transfer_exists.h" 26 #include "helper.h" 27 28 enum GNUNET_DB_QueryStatus 29 TALER_MERCHANTDB_check_transfer_exists (struct TALER_MERCHANTDB_PostgresContext *pg, 30 const char *instance_id, 31 uint64_t transfer_serial_id) 32 { 33 struct GNUNET_PQ_QueryParam params[] = { 34 GNUNET_PQ_query_param_string (instance_id), 35 GNUNET_PQ_query_param_uint64 (&transfer_serial_id), 36 GNUNET_PQ_query_param_end 37 }; 38 struct GNUNET_PQ_ResultSpec rs[] = { 39 GNUNET_PQ_result_spec_end 40 }; 41 42 check_connection (pg); 43 PREPARE (pg, 44 "check_transfer_exists", 45 "SELECT" 46 " 1" 47 " FROM merchant_transfers" 48 " JOIN merchant_accounts" 49 " USING (account_serial)" 50 " WHERE" 51 " credit_serial=$2" 52 " AND" 53 " merchant_serial=" 54 " (SELECT merchant_serial" 55 " FROM merchant_instances" 56 " WHERE merchant_id=$1)"); 57 58 return GNUNET_PQ_eval_prepared_singleton_select (pg->conn, 59 "check_transfer_exists", 60 params, 61 rs); 62 }