iterate_denomination_pending.c (5140B)
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_denomination_pending.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 DenominationPendingContext 29 { 30 31 /** 32 * Function to call for each bad sig loss. 33 */ 34 TALER_AUDITORDB_DenominationPendingCallback 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_denomination_pending(). 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 DenominationPendingContext *` 59 * @param result the postgres result 60 * @param num_results the number of results in @a result 61 */ 62 static void 63 denomination_pending_cb (void *cls, 64 PGresult *result, 65 unsigned int num_results) 66 { 67 struct DenominationPendingContext *dcc = cls; 68 struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg; 69 70 for (unsigned int i = 0; i < num_results; i++) 71 { 72 uint64_t serial_id; 73 struct TALER_AUDITORDB_DenominationPending dc; 74 struct GNUNET_PQ_ResultSpec rs[] = { 75 GNUNET_PQ_result_spec_uint64 ("row_id", 76 &serial_id), 77 GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash", 78 &dc.denom_pub_hash), 79 TALER_PQ_RESULT_SPEC_AMOUNT ("denom_balance", 80 &dc.denom_balance), 81 TALER_PQ_RESULT_SPEC_AMOUNT ("denom_loss", 82 &dc.denom_loss), 83 GNUNET_PQ_result_spec_uint64 ("num_issued", 84 &dc.num_issued), 85 TALER_PQ_RESULT_SPEC_AMOUNT ("denom_risk", 86 &dc.denom_risk), 87 TALER_PQ_RESULT_SPEC_AMOUNT ("recoup_loss", 88 &dc.recoup_loss), 89 GNUNET_PQ_result_spec_end 90 }; 91 enum GNUNET_GenericReturnValue rval; 92 93 if (GNUNET_OK != 94 GNUNET_PQ_extract_result (result, 95 rs, 96 i)) 97 { 98 GNUNET_break (0); 99 dcc->qs = GNUNET_DB_STATUS_HARD_ERROR; 100 return; 101 } 102 dcc->qs = i + 1; 103 rval = dcc->cb (dcc->cb_cls, 104 serial_id, 105 &dc); 106 GNUNET_PQ_cleanup_result (rs); 107 if (GNUNET_OK != rval) 108 break; 109 } 110 } 111 112 113 enum GNUNET_DB_QueryStatus 114 TALER_AUDITORDB_iterate_denomination_pending ( 115 struct TALER_AUDITORDB_PostgresContext *pg, 116 int64_t limit, 117 uint64_t offset, 118 TALER_AUDITORDB_DenominationPendingCallback cb, 119 void *cb_cls) 120 { 121 uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS, 122 TALER_AUDITORDB_abs_limit (limit)); 123 struct GNUNET_PQ_QueryParam params[] = { 124 GNUNET_PQ_query_param_uint64 (&offset), 125 GNUNET_PQ_query_param_uint64 (&plimit), 126 GNUNET_PQ_query_param_end 127 }; 128 struct DenominationPendingContext dcc = { 129 .cb = cb, 130 .cb_cls = cb_cls, 131 .pg = pg 132 }; 133 enum GNUNET_DB_QueryStatus qs; 134 135 PREPARE (pg, 136 "iterate_denomination_pending_desc", 137 "SELECT" 138 " row_id," 139 " denom_pub_hash," 140 " denom_balance," 141 " denom_loss," 142 " num_issued," 143 " denom_risk," 144 " recoup_loss" 145 " FROM auditor_denomination_pending" 146 " WHERE (row_id < $1)" 147 " ORDER BY row_id DESC" 148 " LIMIT $2" 149 ); 150 PREPARE (pg, 151 "iterate_denomination_pending_asc", 152 "SELECT" 153 " row_id," 154 " denom_pub_hash," 155 " denom_balance," 156 " denom_loss," 157 " num_issued," 158 " denom_risk," 159 " recoup_loss" 160 " FROM auditor_denomination_pending" 161 " WHERE (row_id > $1)" 162 " ORDER BY row_id ASC" 163 " LIMIT $2" 164 ); 165 qs = GNUNET_PQ_eval_prepared_multi_select ( 166 pg->conn, 167 (limit > 0) 168 ? "iterate_denomination_pending_asc" 169 : "iterate_denomination_pending_desc", 170 params, 171 &denomination_pending_cb, 172 &dcc); 173 if (qs > 0) 174 return dcc.qs; 175 GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs); 176 return qs; 177 }