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 : #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 0 : denominations_without_sigs_cb (void *cls,
65 : PGresult *result,
66 : unsigned int num_results)
67 : {
68 0 : struct DenominationsWithoutSigsContext *dcc = cls;
69 0 : struct TALER_AUDITORDB_PostgresContext *pg = dcc->pg;
70 :
71 0 : 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 0 : struct TALER_AUDITORDB_DenominationsWithoutSigs dc = {
77 : .end_time = GNUNET_TIME_UNIT_FOREVER_ABS
78 : };
79 0 : struct GNUNET_PQ_ResultSpec rs[] = {
80 0 : GNUNET_PQ_result_spec_uint64 ("row_id",
81 : &dc.row_id),
82 0 : GNUNET_PQ_result_spec_auto_from_type ("denompub_h",
83 : &dc.denompub_h),
84 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("value",
85 : &dc.value),
86 0 : GNUNET_PQ_result_spec_absolute_time ("start_time",
87 : &dc.start_time),
88 0 : GNUNET_PQ_result_spec_allow_null (
89 : GNUNET_PQ_result_spec_absolute_time ("end_time",
90 : &dc.end_time),
91 : NULL),
92 0 : GNUNET_PQ_result_spec_bool ("suppressed",
93 : &dc.suppressed),
94 : GNUNET_PQ_result_spec_end
95 : };
96 : enum GNUNET_GenericReturnValue rval;
97 :
98 0 : if (GNUNET_OK !=
99 0 : GNUNET_PQ_extract_result (result,
100 : rs,
101 : i))
102 : {
103 0 : GNUNET_break (0);
104 0 : dcc->qs = GNUNET_DB_STATUS_HARD_ERROR;
105 0 : return;
106 : }
107 :
108 0 : dcc->qs = i + 1;
109 :
110 0 : rval = dcc->cb (dcc->cb_cls,
111 : &dc);
112 0 : GNUNET_PQ_cleanup_result (rs);
113 0 : if (GNUNET_OK != rval)
114 0 : break;
115 : }
116 : }
117 :
118 :
119 : enum GNUNET_DB_QueryStatus
120 0 : 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 0 : uint64_t plimit = GNUNET_MIN ((uint64_t) MAX_RECORDS,
129 : TALER_AUDITORDB_abs_limit (limit));
130 0 : struct GNUNET_PQ_QueryParam params[] = {
131 0 : GNUNET_PQ_query_param_uint64 (&offset),
132 0 : GNUNET_PQ_query_param_bool (return_suppressed),
133 0 : GNUNET_PQ_query_param_uint64 (&plimit),
134 : GNUNET_PQ_query_param_end
135 : };
136 0 : struct DenominationsWithoutSigsContext dcc = {
137 : .cb = cb,
138 : .cb_cls = cb_cls,
139 : .pg = pg
140 : };
141 : enum GNUNET_DB_QueryStatus qs;
142 :
143 0 : 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 0 : 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 0 : 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 0 : if (qs > 0)
182 0 : return dcc.qs;
183 0 : GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
184 0 : return qs;
185 : }
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