pg_lookup_aml_history.c (5780B)
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 /** 17 * @file exchangedb/pg_lookup_aml_history.c 18 * @brief Implementation of the lookup_aml_history function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "taler/exchange-database/lookup_aml_history.h" 23 #include "helper.h" 24 25 26 /** 27 * Closure for callbacks called from #TALER_EXCHANGEDB_lookup_aml_history() 28 */ 29 struct AmlHistoryContext 30 { 31 32 /** 33 * Function to call on each result. 34 */ 35 TALER_EXCHANGEDB_AmlHistoryCallback cb; 36 37 /** 38 * Closure for @e cb. 39 */ 40 void *cb_cls; 41 42 /** 43 * Plugin context. 44 */ 45 struct TALER_EXCHANGEDB_PostgresContext *pg; 46 47 /** 48 * Set to 'true' if the transaction failed. 49 */ 50 bool failed; 51 52 }; 53 54 55 /** 56 * Function 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 AmlHistoryContext` 60 * @param result the postgres result 61 * @param num_results the number of results in @a result 62 */ 63 static void 64 handle_aml_entry (void *cls, 65 PGresult *result, 66 unsigned int num_results) 67 { 68 struct AmlHistoryContext *ahc = cls; 69 70 for (unsigned int i = 0; i < num_results; i++) 71 { 72 uint64_t outcome_serial_id; 73 struct GNUNET_TIME_Timestamp decision_time; 74 char *justification; 75 struct TALER_AmlOfficerPublicKeyP decider_pub; 76 json_t *jproperties; 77 json_t *jnew_rules = NULL; 78 bool to_investigate; 79 bool is_active; 80 struct GNUNET_PQ_ResultSpec rs[] = { 81 GNUNET_PQ_result_spec_uint64 ("outcome_serial_id", 82 &outcome_serial_id), 83 GNUNET_PQ_result_spec_timestamp ("decision_time", 84 &decision_time), 85 GNUNET_PQ_result_spec_string ("justification", 86 &justification), 87 GNUNET_PQ_result_spec_auto_from_type ("decider_pub", 88 &decider_pub), 89 GNUNET_PQ_result_spec_allow_null ( 90 TALER_PQ_result_spec_json ("jproperties", 91 &jproperties), 92 NULL), 93 TALER_PQ_result_spec_json ("jnew_rules", 94 &jnew_rules), 95 GNUNET_PQ_result_spec_bool ("to_investigate", 96 &to_investigate), 97 GNUNET_PQ_result_spec_bool ("is_active", 98 &is_active), 99 GNUNET_PQ_result_spec_end 100 }; 101 102 if (GNUNET_OK != 103 GNUNET_PQ_extract_result (result, 104 rs, 105 i)) 106 { 107 GNUNET_break (0); 108 ahc->failed = true; 109 return; 110 } 111 ahc->cb (ahc->cb_cls, 112 outcome_serial_id, 113 decision_time, 114 justification, 115 &decider_pub, 116 jproperties, 117 jnew_rules, 118 to_investigate, 119 is_active); 120 GNUNET_PQ_cleanup_result (rs); 121 } 122 } 123 124 125 enum GNUNET_DB_QueryStatus 126 TALER_EXCHANGEDB_lookup_aml_history ( 127 struct TALER_EXCHANGEDB_PostgresContext *pg, 128 const struct TALER_NormalizedPaytoHashP *h_payto, 129 uint64_t offset, 130 int64_t limit, 131 TALER_EXCHANGEDB_AmlHistoryCallback cb, 132 void *cb_cls) 133 { 134 struct AmlHistoryContext ahc = { 135 .pg = pg, 136 .cb = cb, 137 .cb_cls = cb_cls 138 }; 139 uint64_t ulimit = (limit < 0) ? (-limit) : limit; 140 struct GNUNET_PQ_QueryParam params[] = { 141 GNUNET_PQ_query_param_auto_from_type (h_payto), 142 GNUNET_PQ_query_param_uint64 (&offset), 143 GNUNET_PQ_query_param_uint64 (&ulimit), 144 GNUNET_PQ_query_param_end 145 }; 146 enum GNUNET_DB_QueryStatus qs; 147 148 PREPARE (pg, 149 "lookup_aml_history_desc", 150 "SELECT" 151 " lo.decision_time" 152 ",lo.outcome_serial_id" 153 ",ah.justification" 154 ",ah.decider_pub" 155 ",lo.jproperties::TEXT" 156 ",lo.jnew_rules::TEXT" 157 ",lo.to_investigate" 158 ",lo.is_active" 159 " FROM aml_history ah" 160 " JOIN legitimization_outcomes lo" 161 " USING (outcome_serial_id)" 162 " WHERE ah.h_payto=$1" 163 " AND lo.outcome_serial_id < $2" 164 " ORDER BY outcome_serial_id DESC" 165 " LIMIT $3;"); 166 PREPARE (pg, 167 "lookup_aml_history_asc", 168 "SELECT" 169 " lo.decision_time" 170 ",lo.outcome_serial_id" 171 ",ah.justification" 172 ",ah.decider_pub" 173 ",lo.jproperties::TEXT" 174 ",lo.jnew_rules::TEXT" 175 ",lo.to_investigate" 176 ",lo.is_active" 177 " FROM aml_history ah" 178 " JOIN legitimization_outcomes lo" 179 " USING (outcome_serial_id)" 180 " WHERE ah.h_payto=$1" 181 " AND lo.outcome_serial_id > $2" 182 " ORDER BY outcome_serial_id ASC" 183 " LIMIT $3;"); 184 qs = GNUNET_PQ_eval_prepared_multi_select ( 185 pg->conn, 186 (limit < 0) 187 ? "lookup_aml_history_desc" 188 : "lookup_aml_history_asc", 189 params, 190 &handle_aml_entry, 191 &ahc); 192 if (qs <= 0) 193 return qs; 194 if (ahc.failed) 195 { 196 GNUNET_break (0); 197 return GNUNET_DB_STATUS_HARD_ERROR; 198 } 199 return qs; 200 }