Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022 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_iterate_denomination_info.c
18 : * @brief Implementation of the iterate_denomination_info function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/platform.h"
22 : #include "taler/taler_error_codes.h"
23 : #include "taler/taler_dbevents.h"
24 : #include "taler/taler_pq_lib.h"
25 : #include "pg_iterate_denomination_info.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #domination_cb_helper()
31 : */
32 : struct DenomIteratorContext
33 : {
34 : /**
35 : * Function to call with the results.
36 : */
37 : TALER_EXCHANGEDB_DenominationCallback cb;
38 :
39 : /**
40 : * Closure to pass to @e cb
41 : */
42 : void *cb_cls;
43 :
44 : /**
45 : * Plugin context.
46 : */
47 : struct PostgresClosure *pg;
48 : };
49 :
50 :
51 : /**
52 : * Helper function for #TEH_PG_iterate_denomination_info().
53 : * Calls the callback with each denomination key.
54 : *
55 : * @param cls a `struct DenomIteratorContext`
56 : * @param result db results
57 : * @param num_results number of results in @a result
58 : */
59 : static void
60 4 : domination_cb_helper (void *cls,
61 : PGresult *result,
62 : unsigned int num_results)
63 : {
64 4 : struct DenomIteratorContext *dic = cls;
65 4 : struct PostgresClosure *pg = dic->pg;
66 :
67 2124 : for (unsigned int i = 0; i<num_results; i++)
68 : {
69 : struct TALER_EXCHANGEDB_DenominationKeyInformation issue;
70 : struct TALER_DenominationPublicKey denom_pub;
71 : struct TALER_DenominationHashP denom_hash;
72 : uint64_t denom_serial;
73 2120 : struct GNUNET_PQ_ResultSpec rs[] = {
74 2120 : GNUNET_PQ_result_spec_uint64 ("denominations_serial",
75 : &denom_serial),
76 2120 : GNUNET_PQ_result_spec_auto_from_type ("master_sig",
77 : &issue.signature),
78 2120 : GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
79 : &denom_hash),
80 2120 : GNUNET_PQ_result_spec_timestamp ("valid_from",
81 : &issue.start),
82 2120 : GNUNET_PQ_result_spec_timestamp ("expire_withdraw",
83 : &issue.expire_withdraw),
84 2120 : GNUNET_PQ_result_spec_timestamp ("expire_deposit",
85 : &issue.expire_deposit),
86 2120 : GNUNET_PQ_result_spec_timestamp ("expire_legal",
87 : &issue.expire_legal),
88 2120 : TALER_PQ_RESULT_SPEC_AMOUNT ("coin",
89 : &issue.value),
90 2120 : TALER_PQ_RESULT_SPEC_AMOUNT ("fee_withdraw",
91 : &issue.fees.withdraw),
92 2120 : TALER_PQ_RESULT_SPEC_AMOUNT ("fee_deposit",
93 : &issue.fees.deposit),
94 2120 : TALER_PQ_RESULT_SPEC_AMOUNT ("fee_refresh",
95 : &issue.fees.refresh),
96 2120 : TALER_PQ_RESULT_SPEC_AMOUNT ("fee_refund",
97 : &issue.fees.refund),
98 2120 : TALER_PQ_result_spec_denom_pub ("denom_pub",
99 : &denom_pub),
100 2120 : GNUNET_PQ_result_spec_uint32 ("age_mask",
101 : &issue.age_mask.bits),
102 : GNUNET_PQ_result_spec_end
103 : };
104 :
105 2120 : if (GNUNET_OK !=
106 2120 : GNUNET_PQ_extract_result (result,
107 : rs,
108 : i))
109 : {
110 0 : GNUNET_break (0);
111 0 : return;
112 : }
113 :
114 : /* Unfortunately we have to carry the age mask in both, the
115 : * TALER_DenominationPublicKey and
116 : * TALER_EXCHANGEDB_DenominationKeyInformation at different times.
117 : * Here we use _both_ so let's make sure the values are the same. */
118 2120 : denom_pub.age_mask = issue.age_mask;
119 2120 : TALER_denom_pub_hash (&denom_pub,
120 : &issue.denom_hash);
121 2120 : if (0 !=
122 2120 : GNUNET_memcmp (&issue.denom_hash,
123 : &denom_hash))
124 : {
125 0 : GNUNET_break (0);
126 : }
127 : else
128 : {
129 2120 : dic->cb (dic->cb_cls,
130 : denom_serial,
131 : &denom_pub,
132 : &issue);
133 : }
134 2120 : TALER_denom_pub_free (&denom_pub);
135 : }
136 : }
137 :
138 :
139 : /**
140 : * Fetch information about all known denomination keys.
141 : *
142 : * @param cls the @e cls of this struct with the plugin-specific state
143 : * @param cb function to call on each denomination key
144 : * @param cb_cls closure for @a cb
145 : * @return transaction status code
146 : */
147 : enum GNUNET_DB_QueryStatus
148 4 : TEH_PG_iterate_denomination_info (void *cls,
149 : TALER_EXCHANGEDB_DenominationCallback cb,
150 : void *cb_cls)
151 : {
152 4 : struct PostgresClosure *pg = cls;
153 4 : struct GNUNET_PQ_QueryParam params[] = {
154 : GNUNET_PQ_query_param_end
155 : };
156 4 : struct DenomIteratorContext dic = {
157 : .cb = cb,
158 : .cb_cls = cb_cls,
159 : .pg = pg
160 : };
161 :
162 4 : PREPARE (pg,
163 : "denomination_iterate",
164 : "SELECT"
165 : " denominations_serial"
166 : ",master_sig"
167 : ",denom_pub_hash"
168 : ",valid_from"
169 : ",expire_withdraw"
170 : ",expire_deposit"
171 : ",expire_legal"
172 : ",coin" /* value of this denom */
173 : ",fee_withdraw"
174 : ",fee_deposit"
175 : ",fee_refresh"
176 : ",fee_refund"
177 : ",denom_pub"
178 : ",age_mask"
179 : " FROM denominations;");
180 4 : return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
181 : "denomination_iterate",
182 : params,
183 : &domination_cb_helper,
184 : &dic);
185 : }
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