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_get_global_fees.c
18 : * @brief Implementation of the get_global_fees 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_get_global_fees.h"
26 : #include "pg_helper.h"
27 :
28 :
29 : /**
30 : * Closure for #global_fees_cb().
31 : */
32 : struct GlobalFeeContext
33 : {
34 : /**
35 : * Function to call for each global fee block.
36 : */
37 : TALER_EXCHANGEDB_GlobalFeeCallback cb;
38 :
39 : /**
40 : * Closure to give to @e rec.
41 : */
42 : void *cb_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 89 : global_fees_cb (void *cls,
66 : PGresult *result,
67 : unsigned int num_results)
68 : {
69 89 : struct GlobalFeeContext *gctx = cls;
70 89 : struct PostgresClosure *pg = gctx->pg;
71 :
72 134 : for (unsigned int i = 0; i<num_results; i++)
73 : {
74 : struct TALER_GlobalFeeSet fees;
75 : struct GNUNET_TIME_Relative purse_timeout;
76 : struct GNUNET_TIME_Relative history_expiration;
77 : uint32_t purse_account_limit;
78 : struct GNUNET_TIME_Timestamp start_date;
79 : struct GNUNET_TIME_Timestamp end_date;
80 : struct TALER_MasterSignatureP master_sig;
81 45 : struct GNUNET_PQ_ResultSpec rs[] = {
82 45 : GNUNET_PQ_result_spec_timestamp ("start_date",
83 : &start_date),
84 45 : GNUNET_PQ_result_spec_timestamp ("end_date",
85 : &end_date),
86 45 : TALER_PQ_RESULT_SPEC_AMOUNT ("history_fee",
87 : &fees.history),
88 45 : TALER_PQ_RESULT_SPEC_AMOUNT ("account_fee",
89 : &fees.account),
90 45 : TALER_PQ_RESULT_SPEC_AMOUNT ("purse_fee",
91 : &fees.purse),
92 45 : GNUNET_PQ_result_spec_relative_time ("purse_timeout",
93 : &purse_timeout),
94 45 : GNUNET_PQ_result_spec_relative_time ("history_expiration",
95 : &history_expiration),
96 45 : GNUNET_PQ_result_spec_uint32 ("purse_account_limit",
97 : &purse_account_limit),
98 45 : GNUNET_PQ_result_spec_auto_from_type ("master_sig",
99 : &master_sig),
100 : GNUNET_PQ_result_spec_end
101 : };
102 45 : if (GNUNET_OK !=
103 45 : GNUNET_PQ_extract_result (result,
104 : rs,
105 : i))
106 : {
107 0 : GNUNET_break (0);
108 0 : gctx->status = GNUNET_SYSERR;
109 0 : break;
110 : }
111 45 : gctx->cb (gctx->cb_cls,
112 : &fees,
113 : purse_timeout,
114 : history_expiration,
115 : purse_account_limit,
116 : start_date,
117 : end_date,
118 : &master_sig);
119 45 : GNUNET_PQ_cleanup_result (rs);
120 : }
121 89 : }
122 :
123 :
124 : enum GNUNET_DB_QueryStatus
125 89 : TEH_PG_get_global_fees (void *cls,
126 : TALER_EXCHANGEDB_GlobalFeeCallback cb,
127 : void *cb_cls)
128 : {
129 89 : struct PostgresClosure *pg = cls;
130 : struct GNUNET_TIME_Timestamp date
131 89 : = GNUNET_TIME_absolute_to_timestamp (
132 : GNUNET_TIME_absolute_subtract (
133 : GNUNET_TIME_absolute_get (),
134 : GNUNET_TIME_UNIT_YEARS));
135 89 : struct GNUNET_PQ_QueryParam params[] = {
136 89 : GNUNET_PQ_query_param_timestamp (&date),
137 : GNUNET_PQ_query_param_end
138 : };
139 89 : struct GlobalFeeContext gctx = {
140 : .cb = cb,
141 : .cb_cls = cb_cls,
142 : .pg = pg,
143 : .status = GNUNET_OK
144 : };
145 :
146 89 : PREPARE (pg,
147 : "get_global_fees",
148 : "SELECT "
149 : " start_date"
150 : ",end_date"
151 : ",history_fee"
152 : ",account_fee"
153 : ",purse_fee"
154 : ",purse_timeout"
155 : ",history_expiration"
156 : ",purse_account_limit"
157 : ",master_sig"
158 : " FROM global_fee"
159 : " WHERE start_date >= $1");
160 89 : return GNUNET_PQ_eval_prepared_multi_select (pg->conn,
161 : "get_global_fees",
162 : params,
163 : &global_fees_cb,
164 : &gctx);
165 : }
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