get_open_legitimization_measure.c (3388B)
1 /* 2 This file is part of TALER 3 Copyright (C) 2026 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 src/exchangedb/get_open_legitimization_measure.c 18 * @brief Implementation of the get_open_legitimization_measure function for Postgres 19 * @author Christian Grothoff 20 */ 21 #include "taler/taler_pq_lib.h" 22 #include "helper.h" 23 #include "exchange-database/get_open_legitimization_measure.h" 24 25 26 enum GNUNET_DB_QueryStatus 27 TALER_EXCHANGEDB_get_open_legitimization_measure ( 28 struct TALER_EXCHANGEDB_PostgresContext *pg, 29 const struct TALER_NormalizedPaytoHashP *h_payto, 30 uint64_t *legitimization_measure_serial_id, 31 struct GNUNET_TIME_Absolute *start_time) 32 { 33 struct GNUNET_PQ_QueryParam params[] = { 34 GNUNET_PQ_query_param_auto_from_type (h_payto), 35 GNUNET_PQ_query_param_end 36 }; 37 struct GNUNET_PQ_ResultSpec rs[] = { 38 GNUNET_PQ_result_spec_uint64 ("legitimization_measure_serial_id", 39 legitimization_measure_serial_id), 40 GNUNET_PQ_result_spec_absolute_time ("start_time", 41 start_time), 42 GNUNET_PQ_result_spec_end 43 }; 44 45 /* `legitimization_measures' is keyed by the account's access token, which 46 lives in `kyc_targets', while `legitimization_processes' and 47 `legitimization_outcomes' are keyed by the normalized payto hash -- 48 hence the join. 49 50 The second of slack on `start_time' is the same one as in 51 iterate_legitimization_outcomes_above_serial_id.c: `decision_time' is a 52 rounded timestamp while `start_time' is not, so an honest process can 53 start up to a second "after" the decision it fed. Subtracting from 54 start_time rather than adding to decision_time keeps a decision_time of 55 "forever" from overflowing. */ 56 PREPARE (pg, 57 "get_open_legitimization_measure", 58 "SELECT" 59 " lm.legitimization_measure_serial_id" 60 ",lm.start_time" 61 " FROM legitimization_measures lm" 62 " JOIN kyc_targets kt" 63 " USING (access_token)" 64 " WHERE kt.h_normalized_payto=$1" 65 " AND NOT EXISTS (" 66 " SELECT 1" 67 " FROM legitimization_processes lp" 68 " WHERE lp.legitimization_measure_serial_id" 69 " =lm.legitimization_measure_serial_id" 70 " AND EXISTS (" 71 " SELECT 1" 72 " FROM legitimization_outcomes lo" 73 " WHERE lo.h_payto=kt.h_normalized_payto" 74 " AND lo.decision_time>=lp.start_time-1000000))" 75 " ORDER BY lm.legitimization_measure_serial_id ASC" 76 " LIMIT 1;"); 77 return GNUNET_PQ_eval_prepared_singleton_select ( 78 pg->conn, 79 "get_open_legitimization_measure", 80 params, 81 rs); 82 }