Line data Source code
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/iterate_aml_history.c
18 : * @brief Implementation of the iterate_aml_history function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "exchange-database/iterate_aml_history.h"
23 : #include "helper.h"
24 :
25 :
26 : /**
27 : * Hard upper bound on the number of records returned by a single
28 : * call, regardless of the limit requested by the client.
29 : */
30 : #define MAX_RECORDS 50000
31 :
32 :
33 : /**
34 : * Closure for callbacks called from #TALER_EXCHANGEDB_iterate_aml_history()
35 : */
36 : struct AmlHistoryContext
37 : {
38 :
39 : /**
40 : * Function to call on each result.
41 : */
42 : TALER_EXCHANGEDB_AmlHistoryCallback cb;
43 :
44 : /**
45 : * Closure for @e cb.
46 : */
47 : void *cb_cls;
48 :
49 : /**
50 : * Plugin context.
51 : */
52 : struct TALER_EXCHANGEDB_PostgresContext *pg;
53 :
54 : /**
55 : * Set to 'true' if the transaction failed.
56 : */
57 : bool failed;
58 :
59 : };
60 :
61 :
62 : /**
63 : * Function to be called with the results of a SELECT statement
64 : * that has returned @a num_results results.
65 : *
66 : * @param cls closure of type `struct AmlHistoryContext`
67 : * @param result the postgres result
68 : * @param num_results the number of results in @a result
69 : */
70 : static void
71 4 : handle_aml_entry (void *cls,
72 : PGresult *result,
73 : unsigned int num_results)
74 : {
75 4 : struct AmlHistoryContext *ahc = cls;
76 :
77 9 : for (unsigned int i = 0; i < num_results; i++)
78 : {
79 : uint64_t outcome_serial_id;
80 : struct GNUNET_TIME_Timestamp decision_time;
81 : char *justification;
82 : struct TALER_AmlOfficerPublicKeyP decider_pub;
83 5 : json_t *jproperties = NULL;
84 5 : json_t *jnew_rules = NULL;
85 : bool to_investigate;
86 : bool is_active;
87 5 : struct GNUNET_PQ_ResultSpec rs[] = {
88 5 : GNUNET_PQ_result_spec_uint64 ("outcome_serial_id",
89 : &outcome_serial_id),
90 5 : GNUNET_PQ_result_spec_timestamp ("decision_time",
91 : &decision_time),
92 5 : GNUNET_PQ_result_spec_string ("justification",
93 : &justification),
94 5 : GNUNET_PQ_result_spec_auto_from_type ("decider_pub",
95 : &decider_pub),
96 5 : GNUNET_PQ_result_spec_allow_null (
97 : TALER_PQ_result_spec_json ("jproperties",
98 : &jproperties),
99 : NULL),
100 5 : TALER_PQ_result_spec_json ("jnew_rules",
101 : &jnew_rules),
102 5 : GNUNET_PQ_result_spec_bool ("to_investigate",
103 : &to_investigate),
104 5 : GNUNET_PQ_result_spec_bool ("is_active",
105 : &is_active),
106 : GNUNET_PQ_result_spec_end
107 : };
108 :
109 5 : if (GNUNET_OK !=
110 5 : GNUNET_PQ_extract_result (result,
111 : rs,
112 : i))
113 : {
114 0 : GNUNET_break (0);
115 0 : ahc->failed = true;
116 0 : return;
117 : }
118 5 : ahc->cb (ahc->cb_cls,
119 : outcome_serial_id,
120 : decision_time,
121 : justification,
122 : &decider_pub,
123 : jproperties,
124 : jnew_rules,
125 : to_investigate,
126 : is_active);
127 5 : GNUNET_PQ_cleanup_result (rs);
128 : }
129 : }
130 :
131 :
132 : enum GNUNET_DB_QueryStatus
133 4 : TALER_EXCHANGEDB_iterate_aml_history (
134 : struct TALER_EXCHANGEDB_PostgresContext *pg,
135 : const struct TALER_NormalizedPaytoHashP *h_payto,
136 : uint64_t offset,
137 : int64_t limit,
138 : TALER_EXCHANGEDB_AmlHistoryCallback cb,
139 : void *cb_cls)
140 : {
141 4 : struct AmlHistoryContext ahc = {
142 : .pg = pg,
143 : .cb = cb,
144 : .cb_cls = cb_cls
145 : };
146 4 : uint64_t ulimit = GNUNET_MIN ((uint64_t) MAX_RECORDS,
147 : TALER_EXCHANGEDB_abs_limit (limit));
148 4 : struct GNUNET_PQ_QueryParam params[] = {
149 4 : GNUNET_PQ_query_param_auto_from_type (h_payto),
150 4 : GNUNET_PQ_query_param_uint64 (&offset),
151 4 : GNUNET_PQ_query_param_uint64 (&ulimit),
152 : GNUNET_PQ_query_param_end
153 : };
154 : enum GNUNET_DB_QueryStatus qs;
155 :
156 4 : PREPARE (pg,
157 : "iterate_aml_history_desc",
158 : "SELECT"
159 : " lo.decision_time"
160 : ",lo.outcome_serial_id"
161 : ",ah.justification"
162 : ",ah.decider_pub"
163 : ",lo.jproperties::TEXT"
164 : ",lo.jnew_rules::TEXT"
165 : ",lo.to_investigate"
166 : ",lo.is_active"
167 : " FROM aml_history ah"
168 : " JOIN legitimization_outcomes lo"
169 : " USING (outcome_serial_id)"
170 : " WHERE ah.h_payto=$1"
171 : " AND lo.outcome_serial_id < $2"
172 : " ORDER BY outcome_serial_id DESC"
173 : " LIMIT $3;");
174 4 : PREPARE (pg,
175 : "iterate_aml_history_asc",
176 : "SELECT"
177 : " lo.decision_time"
178 : ",lo.outcome_serial_id"
179 : ",ah.justification"
180 : ",ah.decider_pub"
181 : ",lo.jproperties::TEXT"
182 : ",lo.jnew_rules::TEXT"
183 : ",lo.to_investigate"
184 : ",lo.is_active"
185 : " FROM aml_history ah"
186 : " JOIN legitimization_outcomes lo"
187 : " USING (outcome_serial_id)"
188 : " WHERE ah.h_payto=$1"
189 : " AND lo.outcome_serial_id > $2"
190 : " ORDER BY outcome_serial_id ASC"
191 : " LIMIT $3;");
192 4 : qs = GNUNET_PQ_eval_prepared_multi_select (
193 : pg->conn,
194 : (limit < 0)
195 : ? "iterate_aml_history_desc"
196 : : "iterate_aml_history_asc",
197 : params,
198 : &handle_aml_entry,
199 : &ahc);
200 4 : if (qs <= 0)
201 1 : return qs;
202 3 : if (ahc.failed)
203 : {
204 0 : GNUNET_break (0);
205 0 : return GNUNET_DB_STATUS_HARD_ERROR;
206 : }
207 3 : return qs;
208 : }
|
