pg_select_reserve_open_above_serial_id.c (5067B)
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/taler_pq_lib.h" 22 #include "taler/exchange-database/select_reserve_open_above_serial_id.h" 23 #include "helper.h" 24 25 26 /** 27 * Closure for #reserve_open_serial_helper_cb(). 28 */ 29 struct ReserveOpenSerialContext 30 { 31 32 /** 33 * Callback to call. 34 */ 35 TALER_EXCHANGEDB_ReserveOpenCallback cb; 36 37 /** 38 * Closure for @e cb. 39 */ 40 void *cb_cls; 41 42 /** 43 * Plugin's context. 44 */ 45 struct TALER_EXCHANGEDB_PostgresContext *pg; 46 47 /** 48 * Status code, set to #GNUNET_SYSERR on hard errors. 49 */ 50 enum GNUNET_GenericReturnValue status; 51 }; 52 53 54 /** 55 * Helper function to be called with the results of a SELECT statement 56 * that has returned @a num_results results. 57 * 58 * @param cls closure of type `struct ReserveOpenSerialContext` 59 * @param result the postgres result 60 * @param num_results the number of results in @a result 61 */ 62 static void 63 reserve_open_serial_helper_cb (void *cls, 64 PGresult *result, 65 unsigned int num_results) 66 { 67 struct ReserveOpenSerialContext *rcsc = cls; 68 struct TALER_EXCHANGEDB_PostgresContext *pg = rcsc->pg; 69 70 for (unsigned int i = 0; i<num_results; i++) 71 { 72 uint64_t rowid; 73 struct TALER_ReservePublicKeyP reserve_pub; 74 struct TALER_ReserveSignatureP reserve_sig; 75 uint32_t requested_purse_limit; 76 struct GNUNET_TIME_Timestamp request_timestamp; 77 struct GNUNET_TIME_Timestamp reserve_expiration; 78 struct TALER_Amount reserve_payment; 79 struct GNUNET_PQ_ResultSpec rs[] = { 80 GNUNET_PQ_result_spec_uint64 ("open_request_uuid", 81 &rowid), 82 GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", 83 &reserve_pub), 84 GNUNET_PQ_result_spec_auto_from_type ("reserve_sig", 85 &reserve_sig), 86 GNUNET_PQ_result_spec_timestamp ("request_timestamp", 87 &request_timestamp), 88 GNUNET_PQ_result_spec_timestamp ("expiration_date", 89 &reserve_expiration), 90 GNUNET_PQ_result_spec_uint32 ("requested_purse_limit", 91 &requested_purse_limit), 92 TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_payment", 93 &reserve_payment), 94 GNUNET_PQ_result_spec_end 95 }; 96 enum GNUNET_GenericReturnValue ret; 97 98 if (GNUNET_OK != 99 GNUNET_PQ_extract_result (result, 100 rs, 101 i)) 102 { 103 GNUNET_break (0); 104 rcsc->status = GNUNET_SYSERR; 105 return; 106 } 107 ret = rcsc->cb (rcsc->cb_cls, 108 rowid, 109 &reserve_payment, 110 request_timestamp, 111 reserve_expiration, 112 requested_purse_limit, 113 &reserve_pub, 114 &reserve_sig); 115 GNUNET_PQ_cleanup_result (rs); 116 if (GNUNET_OK != ret) 117 break; 118 } 119 } 120 121 122 enum GNUNET_DB_QueryStatus 123 TALER_EXCHANGEDB_select_reserve_open_above_serial_id ( 124 struct TALER_EXCHANGEDB_PostgresContext *pg, 125 uint64_t serial_id, 126 TALER_EXCHANGEDB_ReserveOpenCallback cb, 127 void *cb_cls) 128 { 129 struct GNUNET_PQ_QueryParam params[] = { 130 GNUNET_PQ_query_param_uint64 (&serial_id), 131 GNUNET_PQ_query_param_end 132 }; 133 struct ReserveOpenSerialContext rcsc = { 134 .cb = cb, 135 .cb_cls = cb_cls, 136 .pg = pg, 137 .status = GNUNET_OK 138 }; 139 enum GNUNET_DB_QueryStatus qs; 140 141 PREPARE ( 142 pg, 143 "reserves_open_get_incr", 144 "SELECT" 145 " open_request_uuid" 146 ",reserve_pub" 147 ",request_timestamp" 148 ",expiration_date" 149 ",reserve_sig" 150 ",reserve_payment" 151 ",requested_purse_limit" 152 " FROM reserves_open_requests" 153 " WHERE open_request_uuid>=$1" 154 " ORDER BY open_request_uuid ASC;"); 155 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 156 "reserves_open_get_incr", 157 params, 158 &reserve_open_serial_helper_cb, 159 &rcsc); 160 if (GNUNET_OK != rcsc.status) 161 return GNUNET_DB_STATUS_HARD_ERROR; 162 return qs; 163 }