iterate_reserves.c (6084B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2024 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 #include "taler/taler_pq_lib.h" 17 #include "pg_helper.h" 18 #include "auditor-database/iterate_reserves.h" 19 20 21 /** 22 * Hard upper bound on the number of records returned by a single 23 * call, regardless of the limit requested by the client. 24 */ 25 #define MAX_RECORDS 50000 26 27 28 struct ReservesContext 29 { 30 31 /** 32 * Function to call for each bad sig loss. 33 */ 34 TALER_AUDITORDB_ReservesCallback cb; 35 36 /** 37 * Closure for @e cb 38 */ 39 void *cb_cls; 40 41 /** 42 * Plugin context. 43 */ 44 struct TALER_AUDITORDB_PostgresContext *pg; 45 46 /** 47 * Query status to return. 48 */ 49 enum GNUNET_DB_QueryStatus qs; 50 }; 51 52 53 /** 54 * Helper function for #TALER_AUDITORDB_iterate_reserves(). 55 * 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 ReservesContext *` 59 * @param result the postgres result 60 * @param num_results the number of results in @a result 61 */ 62 static void 63 reserves_cb (void *cls, 64 PGresult *result, 65 unsigned int num_results) 66 { 67 struct ReservesContext *dcc = cls; 68 struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg; 69 70 for (unsigned int i = 0; i < num_results; i++) 71 { 72 struct TALER_AUDITORDB_Reserves dc; 73 struct GNUNET_PQ_ResultSpec rs[] = { 74 GNUNET_PQ_result_spec_uint64 ("auditor_reserves_rowid", 75 &dc.auditor_reserves_rowid), 76 GNUNET_PQ_result_spec_auto_from_type ("reserve_pub", 77 &dc.reserve_pub), 78 TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_balance", 79 &dc.reserve_balance), 80 TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_loss", 81 &dc.reserve_loss), 82 TALER_PQ_RESULT_SPEC_AMOUNT ("withdraw_fee_balance", 83 &dc.withdraw_fee_balance), 84 TALER_PQ_RESULT_SPEC_AMOUNT ("close_fee_balance", 85 &dc.close_fee_balance), 86 TALER_PQ_RESULT_SPEC_AMOUNT ("purse_fee_balance", 87 &dc.purse_fee_balance), 88 TALER_PQ_RESULT_SPEC_AMOUNT ("open_fee_balance", 89 &dc.open_fee_balance), 90 TALER_PQ_RESULT_SPEC_AMOUNT ("history_fee_balance", 91 &dc.history_fee_balance), 92 GNUNET_PQ_result_spec_absolute_time ("expiration_date", 93 &dc.expiration_date), 94 GNUNET_PQ_result_spec_allow_null ( 95 GNUNET_PQ_result_spec_string ("origin_account", 96 &dc.origin_account.full_payto), 97 NULL), 98 GNUNET_PQ_result_spec_end 99 }; 100 enum GNUNET_GenericReturnValue rval; 101 102 dc.origin_account.full_payto = NULL; 103 if (GNUNET_OK != 104 GNUNET_PQ_extract_result (result, 105 rs, 106 i)) 107 { 108 GNUNET_break (0); 109 dcc->qs = GNUNET_DB_STATUS_HARD_ERROR; 110 return; 111 } 112 dcc->qs = i + 1; 113 rval = dcc->cb (dcc->cb_cls, 114 dc.auditor_reserves_rowid, 115 &dc); 116 GNUNET_PQ_cleanup_result (rs); 117 if (GNUNET_OK != rval) 118 break; 119 } 120 } 121 122 123 enum GNUNET_DB_QueryStatus 124 TALER_AUDITORDB_iterate_reserves (struct TALER_AUDITORDB_PostgresContext *pg, 125 int64_t limit, 126 uint64_t offset, 127 TALER_AUDITORDB_ReservesCallback cb, 128 void *cb_cls) 129 { 130 uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 131 TALER_AUDITORDB_abs_limit (limit)); 132 struct GNUNET_PQ_QueryParam params[] = { 133 GNUNET_PQ_query_param_uint64 (&offset), 134 GNUNET_PQ_query_param_uint64 (&plimit), 135 GNUNET_PQ_query_param_end 136 }; 137 struct ReservesContext dcc = { 138 .cb = cb, 139 .cb_cls = cb_cls, 140 .pg = pg 141 }; 142 enum GNUNET_DB_QueryStatus qs; 143 144 PREPARE (pg, 145 "iterate_reserves_desc", 146 "SELECT" 147 " auditor_reserves_rowid," 148 " reserve_pub," 149 " reserve_balance," 150 " reserve_loss," 151 " withdraw_fee_balance," 152 " close_fee_balance," 153 " purse_fee_balance," 154 " open_fee_balance," 155 " history_fee_balance," 156 " expiration_date," 157 " origin_account" 158 " FROM auditor_reserves" 159 " WHERE (auditor_reserves_rowid < $1)" 160 " ORDER BY auditor_reserves_rowid DESC" 161 " LIMIT $2" 162 ); 163 PREPARE (pg, 164 "iterate_reserves_asc", 165 "SELECT" 166 " auditor_reserves_rowid," 167 " reserve_pub," 168 " reserve_balance," 169 " reserve_loss," 170 " withdraw_fee_balance," 171 " close_fee_balance," 172 " purse_fee_balance," 173 " open_fee_balance," 174 " history_fee_balance," 175 " expiration_date," 176 " origin_account" 177 " FROM auditor_reserves" 178 " WHERE (auditor_reserves_rowid > $1)" 179 " ORDER BY auditor_reserves_rowid ASC" 180 " LIMIT $2" 181 ); 182 qs = GNUNET_PQ_eval_prepared_multi_select ( 183 pg->conn, 184 (limit > 0) 185 ? "iterate_reserves_asc" 186 : "iterate_reserves_desc", 187 params, 188 &reserves_cb, 189 &dcc); 190 if (qs > 0) 191 return dcc.qs; 192 GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs); 193 return qs; 194 }