Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2022, 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 : /**
17 : * @file pg_get_unfinished_close_requests.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_get_unfinished_close_requests.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #reserve_close_cb().
31 : */
32 : struct CloseReserveContext
33 : {
34 : /**
35 : * Function to call for each to be closed reserve.
36 : */
37 : TALER_EXCHANGEDB_ReserveExpiredCallback rec;
38 :
39 : /**
40 : * Closure to give to @e rec.
41 : */
42 : void *rec_cls;
43 :
44 : /**
45 : * Plugin context.
46 : */
47 : struct PostgresClosure *pg;
48 :
49 : /**
50 : * Set to #GNUNET_SYSERR on error.
51 : */
52 : enum GNUNET_GenericReturnValue status;
53 : };
54 :
55 :
56 : /**
57 : * Function to be called with the results of a SELECT statement
58 : * that has returned @a num_results results.
59 : *
60 : * @param cls closure
61 : * @param result the postgres result
62 : * @param num_results the number of results in @a result
63 : */
64 : static void
65 19 : reserve_cb (void *cls,
66 : PGresult *result,
67 : unsigned int num_results)
68 : {
69 19 : struct CloseReserveContext *erc = cls;
70 19 : struct PostgresClosure *pg = erc->pg;
71 19 : enum GNUNET_GenericReturnValue ret = GNUNET_OK;
72 :
73 21 : for (unsigned int i = 0; i<num_results; i++)
74 : {
75 : struct GNUNET_TIME_Timestamp exp_date;
76 : struct TALER_FullPayto account_details;
77 : struct TALER_ReservePublicKeyP reserve_pub;
78 : struct TALER_Amount remaining_balance;
79 : uint64_t close_request_row;
80 2 : struct GNUNET_PQ_ResultSpec rs[] = {
81 2 : GNUNET_PQ_result_spec_timestamp ("expiration_date",
82 : &exp_date),
83 2 : GNUNET_PQ_result_spec_string ("account_details",
84 : &account_details.full_payto),
85 2 : GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
86 : &reserve_pub),
87 2 : TALER_PQ_RESULT_SPEC_AMOUNT ("close",
88 : &remaining_balance),
89 2 : GNUNET_PQ_result_spec_uint64 ("close_request_serial_id",
90 : &close_request_row),
91 : GNUNET_PQ_result_spec_end
92 : };
93 :
94 2 : if (GNUNET_OK !=
95 2 : GNUNET_PQ_extract_result (result,
96 : rs,
97 : i))
98 : {
99 0 : GNUNET_break (0);
100 0 : ret = GNUNET_SYSERR;
101 0 : break;
102 : }
103 2 : ret = erc->rec (erc->rec_cls,
104 : &reserve_pub,
105 : &remaining_balance,
106 : account_details,
107 : exp_date,
108 : close_request_row);
109 2 : GNUNET_PQ_cleanup_result (rs);
110 2 : if (GNUNET_OK != ret)
111 0 : break;
112 : }
113 19 : erc->status = ret;
114 19 : }
115 :
116 :
117 : enum GNUNET_DB_QueryStatus
118 19 : TEH_PG_get_unfinished_close_requests (
119 : void *cls,
120 : TALER_EXCHANGEDB_ReserveExpiredCallback rec,
121 : void *rec_cls)
122 : {
123 19 : struct PostgresClosure *pg = cls;
124 19 : struct GNUNET_PQ_QueryParam params[] = {
125 : GNUNET_PQ_query_param_end
126 : };
127 19 : struct CloseReserveContext ectx = {
128 : .rec = rec,
129 : .rec_cls = rec_cls,
130 : .pg = pg,
131 : .status = GNUNET_OK
132 : };
133 : enum GNUNET_DB_QueryStatus qs;
134 :
135 19 : PREPARE (pg,
136 : "get_unfinished_close_requests",
137 : "UPDATE close_requests AS rc"
138 : " SET done=TRUE"
139 : " WHERE NOT done"
140 : " RETURNING"
141 : " reserve_pub"
142 : " ,close_request_serial_id"
143 : " ,close_timestamp AS expiration_date"
144 : " ,close"
145 : " ,(SELECT payto_uri"
146 : " FROM reserves_in ri"
147 : " JOIN wire_targets wt"
148 : " ON (ri.wire_source_h_payto = wt.wire_target_h_payto)"
149 : " WHERE ri.reserve_pub=rc.reserve_pub)"
150 : " AS account_details;");
151 19 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
152 : "get_unfinished_close_requests",
153 : params,
154 : &reserve_cb,
155 : &ectx);
156 19 : switch (ectx.status)
157 : {
158 0 : case GNUNET_SYSERR:
159 0 : return GNUNET_DB_STATUS_HARD_ERROR;
160 0 : case GNUNET_NO:
161 0 : return GNUNET_DB_STATUS_SOFT_ERROR;
162 19 : case GNUNET_OK:
163 19 : break;
164 : }
165 19 : return qs;
166 : }
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