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 pg_select_reserve_open_above_serial_id.c
18 : * @brief Low-level (statement-level) Postgres database access for the exchange
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_reserve_open_above_serial_id.h"
26 : #include "plugin_exchangedb_common.h"
27 : #include "pg_helper.h"
28 :
29 :
30 : /**
31 : * Closure for #reserve_open_serial_helper_cb().
32 : */
33 : struct ReserveOpenSerialContext
34 : {
35 :
36 : /**
37 : * Callback to call.
38 : */
39 : TALER_EXCHANGEDB_ReserveOpenCallback cb;
40 :
41 : /**
42 : * Closure for @e cb.
43 : */
44 : void *cb_cls;
45 :
46 : /**
47 : * Plugin's context.
48 : */
49 : struct PostgresClosure *pg;
50 :
51 : /**
52 : * Status code, set to #GNUNET_SYSERR on hard errors.
53 : */
54 : enum GNUNET_GenericReturnValue status;
55 : };
56 :
57 :
58 : /**
59 : * Helper function to be called with the results of a SELECT statement
60 : * that has returned @a num_results results.
61 : *
62 : * @param cls closure of type `struct ReserveOpenSerialContext`
63 : * @param result the postgres result
64 : * @param num_results the number of results in @a result
65 : */
66 : static void
67 4 : reserve_open_serial_helper_cb (void *cls,
68 : PGresult *result,
69 : unsigned int num_results)
70 : {
71 4 : struct ReserveOpenSerialContext *rcsc = cls;
72 4 : struct PostgresClosure *pg = rcsc->pg;
73 :
74 4 : for (unsigned int i = 0; i<num_results; i++)
75 : {
76 : uint64_t rowid;
77 : struct TALER_ReservePublicKeyP reserve_pub;
78 : struct TALER_ReserveSignatureP reserve_sig;
79 : uint32_t requested_purse_limit;
80 : struct GNUNET_TIME_Timestamp request_timestamp;
81 : struct GNUNET_TIME_Timestamp reserve_expiration;
82 : struct TALER_Amount reserve_payment;
83 0 : struct GNUNET_PQ_ResultSpec rs[] = {
84 0 : GNUNET_PQ_result_spec_uint64 ("open_request_uuid",
85 : &rowid),
86 0 : GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
87 : &reserve_pub),
88 0 : GNUNET_PQ_result_spec_auto_from_type ("reserve_sig",
89 : &reserve_sig),
90 0 : GNUNET_PQ_result_spec_timestamp ("request_timestamp",
91 : &request_timestamp),
92 0 : GNUNET_PQ_result_spec_timestamp ("expiration_date",
93 : &reserve_expiration),
94 0 : GNUNET_PQ_result_spec_uint32 ("requested_purse_limit",
95 : &requested_purse_limit),
96 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("reserve_payment",
97 : &reserve_payment),
98 : GNUNET_PQ_result_spec_end
99 : };
100 : enum GNUNET_GenericReturnValue ret;
101 :
102 0 : if (GNUNET_OK !=
103 0 : GNUNET_PQ_extract_result (result,
104 : rs,
105 : i))
106 : {
107 0 : GNUNET_break (0);
108 0 : rcsc->status = GNUNET_SYSERR;
109 0 : return;
110 : }
111 0 : ret = rcsc->cb (rcsc->cb_cls,
112 : rowid,
113 : &reserve_payment,
114 : request_timestamp,
115 : reserve_expiration,
116 : requested_purse_limit,
117 : &reserve_pub,
118 : &reserve_sig);
119 0 : GNUNET_PQ_cleanup_result (rs);
120 0 : if (GNUNET_OK != ret)
121 0 : break;
122 : }
123 : }
124 :
125 :
126 : enum GNUNET_DB_QueryStatus
127 4 : TEH_PG_select_reserve_open_above_serial_id (
128 : void *cls,
129 : uint64_t serial_id,
130 : TALER_EXCHANGEDB_ReserveOpenCallback cb,
131 : void *cb_cls)
132 : {
133 4 : struct PostgresClosure *pg = cls;
134 4 : struct GNUNET_PQ_QueryParam params[] = {
135 4 : GNUNET_PQ_query_param_uint64 (&serial_id),
136 : GNUNET_PQ_query_param_end
137 : };
138 4 : struct ReserveOpenSerialContext rcsc = {
139 : .cb = cb,
140 : .cb_cls = cb_cls,
141 : .pg = pg,
142 : .status = GNUNET_OK
143 : };
144 : enum GNUNET_DB_QueryStatus qs;
145 :
146 4 : PREPARE (
147 : pg,
148 : "reserves_open_get_incr",
149 : "SELECT"
150 : " open_request_uuid"
151 : ",reserve_pub"
152 : ",request_timestamp"
153 : ",expiration_date"
154 : ",reserve_sig"
155 : ",reserve_payment"
156 : ",requested_purse_limit"
157 : " FROM reserves_open_requests"
158 : " WHERE open_request_uuid>=$1"
159 : " ORDER BY open_request_uuid ASC;");
160 4 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
161 : "reserves_open_get_incr",
162 : params,
163 : &reserve_open_serial_helper_cb,
164 : &rcsc);
165 4 : if (GNUNET_OK != rcsc.status)
166 0 : return GNUNET_DB_STATUS_HARD_ERROR;
167 4 : return qs;
168 : }
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