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/select_purse_decisions_above_serial_id.c
18 : * @brief Implementation of the select_purse_decisions_above_serial_id function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "exchange-database/select_purse_decisions_above_serial_id.h"
23 : #include "helper.h"
24 :
25 : /**
26 : * Closure for #purse_decision_serial_helper_cb().
27 : */
28 : struct PurseDecisionSerialContext
29 : {
30 :
31 : /**
32 : * Callback to call.
33 : */
34 : TALER_EXCHANGEDB_PurseDecisionCallback cb;
35 :
36 : /**
37 : * Closure for @e cb.
38 : */
39 : void *cb_cls;
40 :
41 : /**
42 : * Plugin context.
43 : */
44 : struct TALER_EXCHANGEDB_PostgresContext *pg;
45 :
46 : /**
47 : * Status code, set to #GNUNET_SYSERR on hard errors.
48 : */
49 : enum GNUNET_GenericReturnValue status;
50 : };
51 :
52 :
53 : /**
54 : * Helper function to be called with the results of a SELECT statement
55 : * that has returned @a num_results results.
56 : *
57 : * @param cls closure of type `struct PurseRefundSerialContext`
58 : * @param result the postgres result
59 : * @param num_results the number of results in @a result
60 : */
61 : static void
62 8 : purse_decision_serial_helper_cb (void *cls,
63 : PGresult *result,
64 : unsigned int num_results)
65 : {
66 8 : struct PurseDecisionSerialContext *dsc = cls;
67 8 : struct TALER_EXCHANGEDB_PostgresContext *pg = dsc->pg;
68 :
69 8 : for (unsigned int i = 0; i<num_results; i++)
70 : {
71 : struct TALER_PurseContractPublicKeyP purse_pub;
72 : struct TALER_ReservePublicKeyP reserve_pub;
73 0 : bool no_reserve = true;
74 : uint64_t rowid;
75 : struct TALER_Amount val;
76 0 : struct GNUNET_PQ_ResultSpec rs[] = {
77 0 : GNUNET_PQ_result_spec_auto_from_type ("purse_pub",
78 : &purse_pub),
79 0 : GNUNET_PQ_result_spec_allow_null (
80 : GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
81 : &reserve_pub),
82 : &no_reserve),
83 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
84 : &val),
85 0 : GNUNET_PQ_result_spec_uint64 ("purse_decision_serial_id",
86 : &rowid),
87 : GNUNET_PQ_result_spec_end
88 : };
89 : enum GNUNET_GenericReturnValue ret;
90 :
91 0 : if (GNUNET_OK !=
92 0 : GNUNET_PQ_extract_result (result,
93 : rs,
94 : i))
95 : {
96 0 : GNUNET_break (0);
97 0 : dsc->status = GNUNET_SYSERR;
98 0 : return;
99 : }
100 0 : ret = dsc->cb (dsc->cb_cls,
101 : rowid,
102 : &purse_pub,
103 : no_reserve ? NULL : &reserve_pub,
104 : &val);
105 0 : GNUNET_PQ_cleanup_result (rs);
106 0 : if (GNUNET_OK != ret)
107 0 : break;
108 : }
109 : }
110 :
111 :
112 : enum GNUNET_DB_QueryStatus
113 8 : TALER_TALER_EXCHANGEDB_select_purse_decisions_above_serial_id (
114 : struct TALER_EXCHANGEDB_PostgresContext *pg,
115 : uint64_t serial_id,
116 : bool refunded,
117 : TALER_EXCHANGEDB_PurseDecisionCallback cb,
118 : void *cb_cls)
119 : {
120 8 : struct GNUNET_PQ_QueryParam params[] = {
121 8 : GNUNET_PQ_query_param_uint64 (&serial_id),
122 8 : GNUNET_PQ_query_param_bool (refunded),
123 : GNUNET_PQ_query_param_end
124 : };
125 8 : struct PurseDecisionSerialContext dsc = {
126 : .cb = cb,
127 : .cb_cls = cb_cls,
128 : .pg = pg,
129 : .status = GNUNET_OK
130 : };
131 : enum GNUNET_DB_QueryStatus qs;
132 :
133 8 : PREPARE (pg,
134 : "audit_get_purse_decisions_incr",
135 : "SELECT"
136 : " pd.purse_pub"
137 : ",pm.reserve_pub"
138 : ",pd.purse_decision_serial_id"
139 : ",pr.amount_with_fee"
140 : " FROM purse_decision pd"
141 : " JOIN purse_requests pr ON (pd.purse_pub = pr.purse_pub)"
142 : " LEFT JOIN purse_merges pm ON (pm.purse_pub = pd.purse_pub)"
143 : " WHERE ("
144 : " (purse_decision_serial_id>=$1) AND "
145 : " (refunded=$2)"
146 : " )"
147 : " ORDER BY purse_decision_serial_id ASC;");
148 :
149 :
150 8 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
151 : "audit_get_purse_decisions_incr",
152 : params,
153 : &purse_decision_serial_helper_cb,
154 : &dsc);
155 8 : if (GNUNET_OK != dsc.status)
156 0 : return GNUNET_DB_STATUS_HARD_ERROR;
157 8 : return qs;
158 : }
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