pg_get_global_fees.c (5087B)
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/pg_get_global_fees.c 18 * @brief Implementation of the get_global_fees 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_get_global_fees.h" 26 #include "pg_helper.h" 27 28 29 /** 30 * Closure for #global_fees_cb(). 31 */ 32 struct GlobalFeeContext 33 { 34 /** 35 * Function to call for each global fee block. 36 */ 37 TALER_EXCHANGEDB_GlobalFeeCallback cb; 38 39 /** 40 * Closure to give to @e rec. 41 */ 42 void *cb_cls; 43 44 /** 45 * Plugin context. 46 */ 47 struct PostgresClosure *pg; 48 49 /** 50 * Set to #GNUNET_SYSERR on error. 51 */ 52 enum GNUNET_GenericReturnValue status; 53 }; 54 55 56 /** 57 * Function to be called with the results of a SELECT statement 58 * that has returned @a num_results results. 59 * 60 * @param cls closure 61 * @param result the postgres result 62 * @param num_results the number of results in @a result 63 */ 64 static void 65 global_fees_cb (void *cls, 66 PGresult *result, 67 unsigned int num_results) 68 { 69 struct GlobalFeeContext *gctx = cls; 70 struct PostgresClosure *pg = gctx->pg; 71 72 for (unsigned int i = 0; i<num_results; i++) 73 { 74 struct TALER_GlobalFeeSet fees; 75 struct GNUNET_TIME_Relative purse_timeout; 76 struct GNUNET_TIME_Relative history_expiration; 77 uint32_t purse_account_limit; 78 struct GNUNET_TIME_Timestamp start_date; 79 struct GNUNET_TIME_Timestamp end_date; 80 struct TALER_MasterSignatureP master_sig; 81 struct GNUNET_PQ_ResultSpec rs[] = { 82 GNUNET_PQ_result_spec_timestamp ("start_date", 83 &start_date), 84 GNUNET_PQ_result_spec_timestamp ("end_date", 85 &end_date), 86 TALER_PQ_RESULT_SPEC_AMOUNT ("history_fee", 87 &fees.history), 88 TALER_PQ_RESULT_SPEC_AMOUNT ("account_fee", 89 &fees.account), 90 TALER_PQ_RESULT_SPEC_AMOUNT ("purse_fee", 91 &fees.purse), 92 GNUNET_PQ_result_spec_relative_time ("purse_timeout", 93 &purse_timeout), 94 GNUNET_PQ_result_spec_relative_time ("history_expiration", 95 &history_expiration), 96 GNUNET_PQ_result_spec_uint32 ("purse_account_limit", 97 &purse_account_limit), 98 GNUNET_PQ_result_spec_auto_from_type ("master_sig", 99 &master_sig), 100 GNUNET_PQ_result_spec_end 101 }; 102 if (GNUNET_OK != 103 GNUNET_PQ_extract_result (result, 104 rs, 105 i)) 106 { 107 GNUNET_break (0); 108 gctx->status = GNUNET_SYSERR; 109 break; 110 } 111 gctx->cb (gctx->cb_cls, 112 &fees, 113 purse_timeout, 114 history_expiration, 115 purse_account_limit, 116 start_date, 117 end_date, 118 &master_sig); 119 GNUNET_PQ_cleanup_result (rs); 120 } 121 } 122 123 124 enum GNUNET_DB_QueryStatus 125 TEH_PG_get_global_fees (void *cls, 126 TALER_EXCHANGEDB_GlobalFeeCallback cb, 127 void *cb_cls) 128 { 129 struct PostgresClosure *pg = cls; 130 struct GNUNET_TIME_Timestamp date 131 = GNUNET_TIME_absolute_to_timestamp ( 132 GNUNET_TIME_absolute_subtract ( 133 GNUNET_TIME_absolute_get (), 134 GNUNET_TIME_UNIT_YEARS)); 135 struct GNUNET_PQ_QueryParam params[] = { 136 GNUNET_PQ_query_param_timestamp (&date), 137 GNUNET_PQ_query_param_end 138 }; 139 struct GlobalFeeContext gctx = { 140 .cb = cb, 141 .cb_cls = cb_cls, 142 .pg = pg, 143 .status = GNUNET_OK 144 }; 145 146 PREPARE (pg, 147 "get_global_fees", 148 "SELECT " 149 " start_date" 150 ",end_date" 151 ",history_fee" 152 ",account_fee" 153 ",purse_fee" 154 ",purse_timeout" 155 ",history_expiration" 156 ",purse_account_limit" 157 ",master_sig" 158 " FROM global_fee" 159 " WHERE start_date >= $1"); 160 return GNUNET_PQ_eval_prepared_multi_select (pg->conn, 161 "get_global_fees", 162 params, 163 &global_fees_cb, 164 &gctx); 165 }