Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022, 2025 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_select_refreshes_above_serial_id.c
18 : * @brief Implementation of the select_refreshes_above_serial_id 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_select_refreshes_above_serial_id.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #refreshs_serial_helper_cb().
31 : */
32 : struct RefreshsSerialContext
33 : {
34 :
35 : /**
36 : * Callback to call.
37 : */
38 : TALER_EXCHANGEDB_RefreshesCallback cb;
39 :
40 : /**
41 : * Closure for @e cb.
42 : */
43 : void *cb_cls;
44 :
45 : /**
46 : * Plugin context.
47 : */
48 : struct PostgresClosure *pg;
49 :
50 : /**
51 : * Status code, set to #GNUNET_SYSERR on hard errors.
52 : */
53 : enum GNUNET_GenericReturnValue status;
54 : };
55 :
56 :
57 : /**
58 : * Helper function to be called with the results of a SELECT statement
59 : * that has returned @a num_results results.
60 : *
61 : * @param cls closure of type `struct RefreshsSerialContext`
62 : * @param result the postgres result
63 : * @param num_results the number of results in @a result
64 : */
65 : static void
66 74 : refreshs_serial_helper_cb (void *cls,
67 : PGresult *result,
68 : unsigned int num_results)
69 : {
70 74 : struct RefreshsSerialContext *rsc = cls;
71 74 : struct PostgresClosure *pg = rsc->pg;
72 :
73 210 : for (unsigned int i = 0; i<num_results; i++)
74 : {
75 : struct TALER_DenominationPublicKey old_denom_pub;
76 : struct TALER_CoinSpendPublicKeyP coin_pub;
77 : struct TALER_CoinSpendSignatureP coin_sig;
78 : struct TALER_AgeCommitmentHashP h_age_commitment;
79 : bool ac_isnull;
80 : struct TALER_Amount amount_with_fee;
81 : uint64_t rowid;
82 : struct TALER_RefreshCommitmentP rc;
83 : size_t num_nds;
84 : uint64_t *nds;
85 136 : struct GNUNET_PQ_ResultSpec rs[] = {
86 136 : TALER_PQ_result_spec_denom_pub ("old_denom_pub",
87 : &old_denom_pub),
88 136 : GNUNET_PQ_result_spec_auto_from_type ("old_coin_pub",
89 : &coin_pub),
90 136 : GNUNET_PQ_result_spec_allow_null (
91 : GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
92 : &h_age_commitment),
93 : &ac_isnull),
94 136 : GNUNET_PQ_result_spec_auto_from_type ("old_coin_sig",
95 : &coin_sig),
96 136 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
97 : &amount_with_fee),
98 136 : GNUNET_PQ_result_spec_uint64 ("refresh_id",
99 : &rowid),
100 136 : GNUNET_PQ_result_spec_auto_from_type ("rc",
101 : &rc),
102 136 : GNUNET_PQ_result_spec_array_uint64 (pg->conn,
103 : "new_denominations_serials",
104 : &num_nds,
105 : &nds),
106 : GNUNET_PQ_result_spec_end
107 : };
108 : enum GNUNET_GenericReturnValue ret;
109 :
110 136 : if (GNUNET_OK !=
111 136 : GNUNET_PQ_extract_result (result,
112 : rs,
113 : i))
114 : {
115 0 : GNUNET_break (0);
116 0 : rsc->status = GNUNET_SYSERR;
117 0 : return;
118 : }
119 :
120 136 : ret = rsc->cb (rsc->cb_cls,
121 : rowid,
122 : &old_denom_pub,
123 : &coin_pub,
124 : &coin_sig,
125 : ac_isnull ? NULL : &h_age_commitment,
126 : &amount_with_fee,
127 : num_nds,
128 : nds,
129 : &rc);
130 136 : GNUNET_PQ_cleanup_result (rs);
131 136 : if (GNUNET_OK != ret)
132 0 : break;
133 : }
134 : }
135 :
136 :
137 : enum GNUNET_DB_QueryStatus
138 74 : TEH_PG_select_refreshes_above_serial_id (
139 : void *cls,
140 : uint64_t serial_id,
141 : TALER_EXCHANGEDB_RefreshesCallback cb,
142 : void *cb_cls)
143 : {
144 74 : struct PostgresClosure *pg = cls;
145 74 : struct GNUNET_PQ_QueryParam params[] = {
146 74 : GNUNET_PQ_query_param_uint64 (&serial_id),
147 : GNUNET_PQ_query_param_end
148 : };
149 74 : struct RefreshsSerialContext rsc = {
150 : .cb = cb,
151 : .cb_cls = cb_cls,
152 : .pg = pg,
153 : .status = GNUNET_OK
154 : };
155 : enum GNUNET_DB_QueryStatus qs;
156 :
157 74 : PREPARE (pg,
158 : "select_refreshes_above_serial_id",
159 : "SELECT"
160 : " denom.denom_pub AS old_denom_pub"
161 : ",r.old_coin_pub"
162 : ",kc.age_commitment_hash"
163 : ",r.old_coin_sig"
164 : ",r.amount_with_fee"
165 : ",r.refresh_id"
166 : ",r.rc"
167 : ",r.denom_serials AS new_denominations_serials"
168 : " FROM refresh r"
169 : " JOIN known_coins kc"
170 : " ON (r.old_coin_pub = kc.coin_pub)"
171 : " JOIN denominations denom"
172 : " ON (kc.denominations_serial = denom.denominations_serial)"
173 : " WHERE refresh_id>=$1"
174 : " ORDER BY refresh_id ASC;");
175 74 : qs = GNUNET_PQ_eval_prepared_multi_select (
176 : pg->conn,
177 : "select_refreshes_above_serial_id",
178 : params,
179 : &refreshs_serial_helper_cb,
180 : &rsc);
181 74 : if (GNUNET_OK != rsc.status)
182 0 : return GNUNET_DB_STATUS_HARD_ERROR;
183 74 : return qs;
184 : }
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