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_select_recoup_above_serial_id.c
18 : * @brief Implementation of the select_recoup_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_recoup_above_serial_id.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #recoup_serial_helper_cb().
31 : */
32 : struct RecoupSerialContext
33 : {
34 :
35 : /**
36 : * Callback to call.
37 : */
38 : TALER_EXCHANGEDB_RecoupCallback 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 RecoupSerialContext`
62 : * @param result the postgres result
63 : * @param num_results the number of results in @a result
64 : */
65 : static void
66 8 : recoup_serial_helper_cb (void *cls,
67 : PGresult *result,
68 : unsigned int num_results)
69 : {
70 8 : struct RecoupSerialContext *psc = cls;
71 8 : struct PostgresClosure *pg = psc->pg;
72 :
73 8 : for (unsigned int i = 0; i<num_results; i++)
74 : {
75 : uint64_t rowid;
76 : struct TALER_ReservePublicKeyP reserve_pub;
77 : struct TALER_CoinPublicInfo coin;
78 : struct TALER_CoinSpendSignatureP coin_sig;
79 : union GNUNET_CRYPTO_BlindingSecretP coin_blind;
80 : struct TALER_Amount amount;
81 : struct TALER_DenominationPublicKey denom_pub;
82 : struct GNUNET_TIME_Timestamp timestamp;
83 0 : struct GNUNET_PQ_ResultSpec rs[] = {
84 0 : GNUNET_PQ_result_spec_uint64 ("recoup_uuid",
85 : &rowid),
86 0 : GNUNET_PQ_result_spec_timestamp ("recoup_timestamp",
87 : ×tamp),
88 0 : GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
89 : &reserve_pub),
90 0 : GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
91 : &coin.coin_pub),
92 0 : TALER_PQ_result_spec_denom_pub ("denom_pub",
93 : &denom_pub),
94 0 : GNUNET_PQ_result_spec_auto_from_type ("coin_sig",
95 : &coin_sig),
96 0 : GNUNET_PQ_result_spec_auto_from_type ("coin_blind",
97 : &coin_blind),
98 0 : GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
99 : &coin.denom_pub_hash),
100 0 : GNUNET_PQ_result_spec_allow_null (
101 : GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
102 : &coin.h_age_commitment),
103 : &coin.no_age_commitment),
104 0 : TALER_PQ_result_spec_denom_sig ("denom_sig",
105 : &coin.denom_sig),
106 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
107 : &amount),
108 : GNUNET_PQ_result_spec_end
109 : };
110 : int ret;
111 :
112 0 : if (GNUNET_OK !=
113 0 : GNUNET_PQ_extract_result (result,
114 : rs,
115 : i))
116 : {
117 0 : GNUNET_break (0);
118 0 : psc->status = GNUNET_SYSERR;
119 0 : return;
120 : }
121 0 : ret = psc->cb (psc->cb_cls,
122 : rowid,
123 : timestamp,
124 : &amount,
125 : &reserve_pub,
126 : &coin,
127 : &denom_pub,
128 : &coin_sig,
129 : &coin_blind);
130 0 : GNUNET_PQ_cleanup_result (rs);
131 0 : if (GNUNET_OK != ret)
132 0 : break;
133 : }
134 : }
135 :
136 :
137 : enum GNUNET_DB_QueryStatus
138 8 : TEH_PG_select_recoup_above_serial_id (
139 : void *cls,
140 : uint64_t serial_id,
141 : TALER_EXCHANGEDB_RecoupCallback cb,
142 : void *cb_cls)
143 : {
144 8 : struct PostgresClosure *pg = cls;
145 8 : struct GNUNET_PQ_QueryParam params[] = {
146 8 : GNUNET_PQ_query_param_uint64 (&serial_id),
147 : GNUNET_PQ_query_param_end
148 : };
149 8 : struct RecoupSerialContext psc = {
150 : .cb = cb,
151 : .cb_cls = cb_cls,
152 : .pg = pg,
153 : .status = GNUNET_OK
154 : };
155 : enum GNUNET_DB_QueryStatus qs;
156 :
157 8 : PREPARE (pg,
158 : "recoup_get_incr",
159 : "SELECT"
160 : " recoup_uuid"
161 : ",recoup_timestamp"
162 : ",withdraw.reserve_pub"
163 : ",coins.coin_pub"
164 : ",coin_sig"
165 : ",coin_blind"
166 : ",denoms.denom_pub_hash"
167 : ",coins.denom_sig"
168 : ",coins.age_commitment_hash"
169 : ",denoms.denom_pub"
170 : ",amount"
171 : " FROM recoup"
172 : " JOIN known_coins coins"
173 : " USING (coin_pub)"
174 : " JOIN withdraw"
175 : " USING (withdraw_id)"
176 : " JOIN denominations denoms"
177 : " ON (coins.denominations_serial = denoms.denominations_serial)"
178 : " WHERE recoup_uuid>=$1"
179 : " ORDER BY recoup_uuid ASC;");
180 8 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
181 : "recoup_get_incr",
182 : params,
183 : &recoup_serial_helper_cb,
184 : &psc);
185 8 : if (GNUNET_OK != psc.status)
186 0 : return GNUNET_DB_STATUS_HARD_ERROR;
187 8 : return qs;
188 : }
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