iterate_denominations_without_sigs.c (5490B)
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_error_codes.h" 17 #include "taler/taler_pq_lib.h" 18 #include "pg_helper.h" 19 #include "auditor-database/iterate_denominations_without_sigs.h" 20 21 22 /** 23 * Hard upper bound on the number of records returned by a single 24 * call, regardless of the limit requested by the client. 25 */ 26 #define MAX_RECORDS 50000 27 28 29 struct DenominationsWithoutSigsContext 30 { 31 32 /** 33 * Function to call for each bad sig loss. 34 */ 35 TALER_AUDITORDB_DenominationsWithoutSigsCallback cb; 36 37 /** 38 * Closure for @e cb 39 */ 40 void *cb_cls; 41 42 /** 43 * Plugin context. 44 */ 45 struct TALER_AUDITORDB_PostgresContext *pg; 46 47 /** 48 * Query status to return. 49 */ 50 enum GNUNET_DB_QueryStatus qs; 51 }; 52 53 54 /** 55 * Helper function for #TALER_AUDITORDB_iterate_denominations_without_sigs(). 56 * To be called with the results of a SELECT statement 57 * that has returned @a num_results results. 58 * 59 * @param cls closure of type `struct DenominationsWithoutSigsContext *` 60 * @param result the postgres result 61 * @param num_results the number of results in @a result 62 */ 63 static void 64 denominations_without_sigs_cb (void *cls, 65 PGresult *result, 66 unsigned int num_results) 67 { 68 struct DenominationsWithoutSigsContext *dcc = cls; 69 struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg; 70 71 for (unsigned int i = 0; i < num_results; i++) 72 { 73 /* 'end_time' is nullable in the schema; initialize it so that a 74 NULL yields "never" instead of failing the extraction for the 75 entire page. */ 76 struct TALER_AUDITORDB_DenominationsWithoutSigs dc = { 77 .end_time = GNUNET_TIME_UNIT_FOREVER_ABS 78 }; 79 struct GNUNET_PQ_ResultSpec rs[] = { 80 GNUNET_PQ_result_spec_uint64 ("row_id", 81 &dc.row_id), 82 GNUNET_PQ_result_spec_auto_from_type ("denompub_h", 83 &dc.denompub_h), 84 TALER_PQ_RESULT_SPEC_AMOUNT ("value", 85 &dc.value), 86 GNUNET_PQ_result_spec_absolute_time ("start_time", 87 &dc.start_time), 88 GNUNET_PQ_result_spec_allow_null ( 89 GNUNET_PQ_result_spec_absolute_time ("end_time", 90 &dc.end_time), 91 NULL), 92 GNUNET_PQ_result_spec_bool ("suppressed", 93 &dc.suppressed), 94 GNUNET_PQ_result_spec_end 95 }; 96 enum GNUNET_GenericReturnValue rval; 97 98 if (GNUNET_OK != 99 GNUNET_PQ_extract_result (result, 100 rs, 101 i)) 102 { 103 GNUNET_break (0); 104 dcc->qs = GNUNET_DB_STATUS_HARD_ERROR; 105 return; 106 } 107 108 dcc->qs = i + 1; 109 110 rval = dcc->cb (dcc->cb_cls, 111 &dc); 112 GNUNET_PQ_cleanup_result (rs); 113 if (GNUNET_OK != rval) 114 break; 115 } 116 } 117 118 119 enum GNUNET_DB_QueryStatus 120 TALER_AUDITORDB_iterate_denominations_without_sigs ( 121 struct TALER_AUDITORDB_PostgresContext *pg, 122 int64_t limit, 123 uint64_t offset, 124 bool return_suppressed, 125 TALER_AUDITORDB_DenominationsWithoutSigsCallback cb, 126 void *cb_cls) 127 { 128 uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 129 TALER_AUDITORDB_abs_limit (limit)); 130 struct GNUNET_PQ_QueryParam params[] = { 131 GNUNET_PQ_query_param_uint64 (&offset), 132 GNUNET_PQ_query_param_bool (return_suppressed), 133 GNUNET_PQ_query_param_uint64 (&plimit), 134 GNUNET_PQ_query_param_end 135 }; 136 struct DenominationsWithoutSigsContext dcc = { 137 .cb = cb, 138 .cb_cls = cb_cls, 139 .pg = pg 140 }; 141 enum GNUNET_DB_QueryStatus qs; 142 143 PREPARE (pg, 144 "iterate_denominations_without_sigs_desc", 145 "SELECT" 146 " row_id," 147 " denompub_h," 148 " value," 149 " start_time," 150 " end_time," 151 " suppressed" 152 " FROM auditor_denominations_without_sigs" 153 " WHERE (row_id < $1)" 154 " AND ($2 OR NOT suppressed)" 155 " ORDER BY row_id DESC" 156 " LIMIT $3" 157 ); 158 PREPARE (pg, 159 "iterate_denominations_without_sigs_asc", 160 "SELECT" 161 " row_id," 162 " denompub_h," 163 " value," 164 " start_time," 165 " end_time," 166 " suppressed" 167 " FROM auditor_denominations_without_sigs" 168 " WHERE (row_id > $1)" 169 " AND ($2 OR NOT suppressed)" 170 " ORDER BY row_id ASC" 171 " LIMIT $3" 172 ); 173 qs = GNUNET_PQ_eval_prepared_multi_select ( 174 pg->conn, 175 (limit > 0) 176 ? "iterate_denominations_without_sigs_asc" 177 : "iterate_denominations_without_sigs_desc", 178 params, 179 &denominations_without_sigs_cb, 180 &dcc); 181 if (qs > 0) 182 return dcc.qs; 183 GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs); 184 return qs; 185 }