pg_select_purse_requests_above_serial_id.c (5652B)
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_purse_requests_above_serial_id.c 18 * @brief Implementation of the select_purse_requests_above_serial_id function for Postgres 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_purse_requests_above_serial_id.h" 26 #include "pg_helper.h" 27 28 29 /** 30 * Closure for #purse_deposit_serial_helper_cb(). 31 */ 32 struct PurseRequestsSerialContext 33 { 34 35 /** 36 * Callback to call. 37 */ 38 TALER_EXCHANGEDB_PurseRequestCallback cb; 39 40 /** 41 * Closure for @e cb. 42 */ 43 void *cb_cls; 44 45 /** 46 * Plugin context. 47 */ 48 struct PostgresClosure *pg; 49 50 /** 51 * Status code, set to #GNUNET_SYSERR on hard errors. 52 */ 53 enum GNUNET_GenericReturnValue status; 54 }; 55 56 57 /** 58 * Helper function to be called with the results of a SELECT statement 59 * that has returned @a num_results results. 60 * 61 * @param cls closure of type `struct PurseRequestsSerialContext` 62 * @param result the postgres result 63 * @param num_results the number of results in @a result 64 */ 65 static void 66 purse_requests_serial_helper_cb (void *cls, 67 PGresult *result, 68 unsigned int num_results) 69 { 70 struct PurseRequestsSerialContext *dsc = cls; 71 struct PostgresClosure *pg = dsc->pg; 72 73 for (unsigned int i = 0; i<num_results; i++) 74 { 75 uint64_t rowid; 76 struct TALER_Amount target_amount; 77 uint32_t age_limit; 78 struct TALER_PurseMergePublicKeyP merge_pub; 79 struct TALER_PurseContractPublicKeyP purse_pub; 80 struct TALER_PrivateContractHashP h_contract_terms; 81 struct TALER_PurseContractSignatureP purse_sig; 82 struct GNUNET_TIME_Timestamp purse_creation; 83 struct GNUNET_TIME_Timestamp purse_expiration; 84 struct GNUNET_PQ_ResultSpec rs[] = { 85 TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee", 86 &target_amount), 87 GNUNET_PQ_result_spec_uint32 ("age_limit", 88 &age_limit), 89 GNUNET_PQ_result_spec_timestamp ("purse_creation", 90 &purse_creation), 91 GNUNET_PQ_result_spec_timestamp ("purse_expiration", 92 &purse_expiration), 93 GNUNET_PQ_result_spec_auto_from_type ("purse_pub", 94 &purse_pub), 95 GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms", 96 &h_contract_terms), 97 GNUNET_PQ_result_spec_auto_from_type ("purse_sig", 98 &purse_sig), 99 GNUNET_PQ_result_spec_auto_from_type ("merge_pub", 100 &merge_pub), 101 GNUNET_PQ_result_spec_uint64 ("purse_requests_serial_id", 102 &rowid), 103 GNUNET_PQ_result_spec_end 104 }; 105 enum GNUNET_GenericReturnValue ret; 106 107 if (GNUNET_OK != 108 GNUNET_PQ_extract_result (result, 109 rs, 110 i)) 111 { 112 GNUNET_break (0); 113 dsc->status = GNUNET_SYSERR; 114 return; 115 } 116 ret = dsc->cb (dsc->cb_cls, 117 rowid, 118 &purse_pub, 119 &merge_pub, 120 purse_creation, 121 purse_expiration, 122 &h_contract_terms, 123 age_limit, 124 &target_amount, 125 &purse_sig); 126 GNUNET_PQ_cleanup_result (rs); 127 if (GNUNET_OK != ret) 128 break; 129 } 130 } 131 132 133 enum GNUNET_DB_QueryStatus 134 TEH_PG_select_purse_requests_above_serial_id ( 135 void *cls, 136 uint64_t serial_id, 137 TALER_EXCHANGEDB_PurseRequestCallback cb, 138 void *cb_cls) 139 { 140 struct PostgresClosure *pg = cls; 141 struct GNUNET_PQ_QueryParam params[] = { 142 GNUNET_PQ_query_param_uint64 (&serial_id), 143 GNUNET_PQ_query_param_end 144 }; 145 struct PurseRequestsSerialContext dsc = { 146 .cb = cb, 147 .cb_cls = cb_cls, 148 .pg = pg, 149 .status = GNUNET_OK 150 }; 151 enum GNUNET_DB_QueryStatus qs; 152 153 PREPARE (pg, 154 "audit_get_purse_requests_incr", 155 "SELECT" 156 " purse_requests_serial_id" 157 ",purse_pub" 158 ",amount_with_fee" 159 ",age_limit" 160 ",h_contract_terms" 161 ",purse_creation" 162 ",purse_expiration" 163 ",merge_pub" 164 ",purse_sig" 165 " FROM purse_requests" 166 " WHERE (" 167 " (purse_requests_serial_id>=$1)" 168 " )" 169 " ORDER BY purse_requests_serial_id ASC;"); 170 qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn, 171 "audit_get_purse_requests_incr", 172 params, 173 &purse_requests_serial_helper_cb, 174 &dsc); 175 if (GNUNET_OK != dsc.status) 176 return GNUNET_DB_STATUS_HARD_ERROR; 177 return qs; 178 }