select_reserves_in_above_serial_id.c (4947B)
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 exchangedb/select_reserves_in_above_serial_id.c 18 * @brief Implementation of the select_reserves_in_above_serial_id function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "exchange-database/select_reserves_in_above_serial_id.h" 23 #include "helper.h" 24 25 /** 26 * Closure for #reserves_in_serial_helper_cb(). 27 */ 28 struct ReservesInSerialContext 29 { 30 31 /** 32 * Callback to call. 33 */ 34 TALER_EXCHANGEDB_ReserveInCallback cb; 35 36 /** 37 * Closure for @e cb. 38 */ 39 void *cb_cls; 40 41 /** 42 * Plugin context. 43 */ 44 struct TALER_EXCHANGEDB_PostgresContext *pg; 45 46 /** 47 * Status code, set to #GNUNET_SYSERR on hard errors. 48 */ 49 enum GNUNET_GenericReturnValue status; 50 }; 51 52 53 /** 54 * Helper function to be called with the results of a SELECT statement 55 * that has returned @a num_results results. 56 * 57 * @param cls closure of type `struct ReservesInSerialContext` 58 * @param result the postgres result 59 * @param num_results the number of results in @a result 60 */ 61 static void 62 reserves_in_serial_helper_cb (void *cls, 63 PGresult *result, 64 unsigned int num_results) 65 { 66 struct ReservesInSerialContext *risc = cls; 67 struct TALER_EXCHANGEDB_PostgresContext *pg = risc->pg; 68 69 for (unsigned int i = 0; i<num_results; i++) 70 { 71 struct TALER_ReservePublicKeyP reserve_pub; 72 struct TALER_Amount credit; 73 struct TALER_FullPayto sender_account_details; 74 struct GNUNET_TIME_Timestamp execution_date; 75 uint64_t rowid; 76 uint64_t wire_reference; 77 struct GNUNET_PQ_ResultSpec rs[] = { 78 GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", 79 &reserve_pub), 80 GNUNET_PQ_result_spec_uint64 ("wire_reference", 81 &wire_reference), 82 TALER_PQ_RESULT_SPEC_AMOUNT ("credit", 83 &credit), 84 GNUNET_PQ_result_spec_timestamp ("execution_date", 85 &execution_date), 86 GNUNET_PQ_result_spec_string ("sender_account_details", 87 &sender_account_details.full_payto), 88 GNUNET_PQ_result_spec_uint64 ("reserve_in_serial_id", 89 &rowid), 90 GNUNET_PQ_result_spec_end 91 }; 92 enum GNUNET_GenericReturnValue ret; 93 94 if (GNUNET_OK != 95 GNUNET_PQ_extract_result (result, 96 rs, 97 i)) 98 { 99 GNUNET_break (0); 100 risc->status = GNUNET_SYSERR; 101 return; 102 } 103 ret = risc->cb (risc->cb_cls, 104 rowid, 105 &reserve_pub, 106 &credit, 107 sender_account_details, 108 wire_reference, 109 execution_date); 110 GNUNET_PQ_cleanup_result (rs); 111 if (GNUNET_OK != ret) 112 break; 113 } 114 } 115 116 117 enum GNUNET_DB_QueryStatus 118 TALER_EXCHANGEDB_select_reserves_in_above_serial_id ( 119 struct TALER_EXCHANGEDB_PostgresContext *pg, 120 uint64_t serial_id, 121 TALER_EXCHANGEDB_ReserveInCallback cb, 122 void *cb_cls) 123 { 124 struct GNUNET_PQ_QueryParam params[] = { 125 GNUNET_PQ_query_param_uint64 (&serial_id), 126 GNUNET_PQ_query_param_end 127 }; 128 struct ReservesInSerialContext risc = { 129 .cb = cb, 130 .cb_cls = cb_cls, 131 .pg = pg, 132 .status = GNUNET_OK 133 }; 134 enum GNUNET_DB_QueryStatus qs; 135 136 PREPARE (pg, 137 "select_reserves_in_above_serial_id", 138 "SELECT" 139 " reserves.reserve_pub" 140 ",wire_reference" 141 ",credit" 142 ",execution_date" 143 ",wt.payto_uri AS sender_account_details" 144 ",reserve_in_serial_id" 145 " FROM reserves_in" 146 " JOIN reserves" 147 " USING (reserve_pub)" 148 " JOIN wire_targets wt" 149 " ON (wire_source_h_payto = wire_target_h_payto)" 150 " WHERE reserve_in_serial_id>=$1" 151 " ORDER BY reserve_in_serial_id;"); 152 qs = GNUNET_PQ_eval_prepared_multi_select ( 153 pg->conn, 154 "select_reserves_in_above_serial_id", 155 params, 156 &reserves_in_serial_helper_cb, 157 &risc); 158 if (GNUNET_DB_STATUS_SOFT_ERROR == qs) 159 return qs; 160 if (GNUNET_OK != risc.status) 161 return GNUNET_DB_STATUS_HARD_ERROR; 162 return qs; 163 }