pg_select_reserve_open_above_serial_id.c (5144B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2022 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 pg_select_reserve_open_above_serial_id.c 18 * @brief Low-level (statement-level) Postgres database access for the exchange 19 * @author Christian Grothoff 20 */ 21 #include "taler/platform.h" 22 #include "taler/taler_error_codes.h" 23 #include "taler/taler_dbevents.h" 24 #include "taler/taler_pq_lib.h" 25 #include "pg_select_reserve_open_above_serial_id.h" 26 #include "plugin_exchangedb_common.h" 27 #include "pg_helper.h" 28 29 30 /** 31 * Closure for #reserve_open_serial_helper_cb(). 32 */ 33 struct ReserveOpenSerialContext 34 { 35 36 /** 37 * Callback to call. 38 */ 39 TALER_EXCHANGEDB_ReserveOpenCallback cb; 40 41 /** 42 * Closure for @e cb. 43 */ 44 void *cb_cls; 45 46 /** 47 * Plugin's context. 48 */ 49 struct PostgresClosure *pg; 50 51 /** 52 * Status code, set to #GNUNET_SYSERR on hard errors. 53 */ 54 enum GNUNET_GenericReturnValue status; 55 }; 56 57 58 /** 59 * Helper function to be called with the results of a SELECT statement 60 * that has returned @a num_results results. 61 * 62 * @param cls closure of type `struct ReserveOpenSerialContext` 63 * @param result the postgres result 64 * @param num_results the number of results in @a result 65 */ 66 static void 67 reserve_open_serial_helper_cb (void *cls, 68 PGresult *result, 69 unsigned int num_results) 70 { 71 struct ReserveOpenSerialContext *rcsc = cls; 72 struct PostgresClosure *pg = rcsc->pg; 73 74 for (unsigned int i = 0; i<num_results; i++) 75 { 76 uint64_t rowid; 77 struct TALER_ReservePublicKeyP reserve_pub; 78 struct TALER_ReserveSignatureP reserve_sig; 79 uint32_t requested_purse_limit; 80 struct GNUNET_TIME_Timestamp request_timestamp; 81 struct GNUNET_TIME_Timestamp reserve_expiration; 82 struct TALER_Amount reserve_payment; 83 struct GNUNET_PQ_ResultSpec rs[] = { 84 GNUNET_PQ_result_spec_uint64 ("open_request_uuid", 85 &rowid), 86 GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", 87 &reserve_pub), 88 GNUNET_PQ_result_spec_auto_from_type ("reserve_sig", 89 &reserve_sig), 90 GNUNET_PQ_result_spec_timestamp ("request_timestamp", 91 &request_timestamp), 92 GNUNET_PQ_result_spec_timestamp ("expiration_date", 93 &reserve_expiration), 94 GNUNET_PQ_result_spec_uint32 ("requested_purse_limit", 95 &requested_purse_limit), 96 TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_payment", 97 &reserve_payment), 98 GNUNET_PQ_result_spec_end 99 }; 100 enum GNUNET_GenericReturnValue ret; 101 102 if (GNUNET_OK != 103 GNUNET_PQ_extract_result (result, 104 rs, 105 i)) 106 { 107 GNUNET_break (0); 108 rcsc->status = GNUNET_SYSERR; 109 return; 110 } 111 ret = rcsc->cb (rcsc->cb_cls, 112 rowid, 113 &reserve_payment, 114 request_timestamp, 115 reserve_expiration, 116 requested_purse_limit, 117 &reserve_pub, 118 &reserve_sig); 119 GNUNET_PQ_cleanup_result (rs); 120 if (GNUNET_OK != ret) 121 break; 122 } 123 } 124 125 126 enum GNUNET_DB_QueryStatus 127 TEH_PG_select_reserve_open_above_serial_id ( 128 void *cls, 129 uint64_t serial_id, 130 TALER_EXCHANGEDB_ReserveOpenCallback cb, 131 void *cb_cls) 132 { 133 struct PostgresClosure *pg = cls; 134 struct GNUNET_PQ_QueryParam params[] = { 135 GNUNET_PQ_query_param_uint64 (&serial_id), 136 GNUNET_PQ_query_param_end 137 }; 138 struct ReserveOpenSerialContext rcsc = { 139 .cb = cb, 140 .cb_cls = cb_cls, 141 .pg = pg, 142 .status = GNUNET_OK 143 }; 144 enum GNUNET_DB_QueryStatus qs; 145 146 PREPARE ( 147 pg, 148 "reserves_open_get_incr", 149 "SELECT" 150 " open_request_uuid" 151 ",reserve_pub" 152 ",request_timestamp" 153 ",expiration_date" 154 ",reserve_sig" 155 ",reserve_payment" 156 ",requested_purse_limit" 157 " FROM reserves_open_requests" 158 " WHERE open_request_uuid>=$1" 159 " ORDER BY open_request_uuid ASC;"); 160 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 161 "reserves_open_get_incr", 162 params, 163 &reserve_open_serial_helper_cb, 164 &rcsc); 165 if (GNUNET_OK != rcsc.status) 166 return GNUNET_DB_STATUS_HARD_ERROR; 167 return qs; 168 }