Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2025 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_exchange_debit_transfers.c
18 : * @brief Implementation of the select_exchange_debit_transfers function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "exchange-database/select_exchange_debit_transfers.h"
23 : #include "helper.h"
24 :
25 :
26 : /**
27 : * Closure for #handle_aml_result.
28 : */
29 : struct SelectTransferContext
30 : {
31 : /**
32 : * Function to call on each result.
33 : */
34 : TALER_EXCHANGEDB_AmlTransferCallback 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 : * Set to #GNUNET_SYSERR on serious errors.
48 : */
49 : enum GNUNET_GenericReturnValue status;
50 : };
51 :
52 :
53 : /**
54 : * Function to be called with the results of a SELECT statement
55 : * that has returned @a num_results results. Helper function
56 : * for #TALER_EXCHANGEDB_select_exchange_debit_transfers().
57 : *
58 : * @param cls closure of type `struct SelectTransferContext *`
59 : * @param result the postgres result
60 : * @param num_results the number of results in @a result
61 : */
62 : static void
63 0 : handle_transfer_cb (void *cls,
64 : PGresult *result,
65 : unsigned int num_results)
66 : {
67 0 : struct SelectTransferContext *stc = cls;
68 0 : struct TALER_EXCHANGEDB_PostgresContext *pg = stc->pg;
69 :
70 0 : for (unsigned int i = 0; i<num_results; i++)
71 : {
72 : char *payto_uri;
73 : uint64_t rowid;
74 : struct GNUNET_TIME_Absolute execution_time;
75 : struct TALER_Amount amount;
76 0 : struct GNUNET_PQ_ResultSpec rs[] = {
77 0 : GNUNET_PQ_result_spec_uint64 ("serial_id",
78 : &rowid),
79 0 : GNUNET_PQ_result_spec_string ("payto_uri",
80 : &payto_uri),
81 0 : GNUNET_PQ_result_spec_absolute_time ("execution_time",
82 : &execution_time),
83 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
84 : &amount),
85 : GNUNET_PQ_result_spec_end
86 : };
87 :
88 0 : if (GNUNET_OK !=
89 0 : GNUNET_PQ_extract_result (result,
90 : rs,
91 : i))
92 : {
93 0 : GNUNET_break (0);
94 0 : stc->status = GNUNET_SYSERR;
95 0 : return;
96 : }
97 0 : stc->cb (stc->cb_cls,
98 : rowid,
99 : payto_uri,
100 : execution_time,
101 : &amount);
102 0 : GNUNET_PQ_cleanup_result (rs);
103 : }
104 : }
105 :
106 :
107 : enum GNUNET_DB_QueryStatus
108 0 : TALER_EXCHANGEDB_select_exchange_debit_transfers (
109 : struct TALER_EXCHANGEDB_PostgresContext *pg,
110 : const struct TALER_Amount *threshold,
111 : uint64_t offset,
112 : int64_t limit,
113 : const struct TALER_NormalizedPaytoHashP *h_payto,
114 : TALER_EXCHANGEDB_AmlTransferCallback cb,
115 : void *cb_cls)
116 : {
117 0 : struct SelectTransferContext stc = {
118 : .pg = pg,
119 : .cb = cb,
120 : .cb_cls = cb_cls,
121 : .status = GNUNET_OK
122 : };
123 0 : uint64_t ulimit = (limit > 0) ? limit : -limit;
124 0 : struct GNUNET_PQ_QueryParam params[] = {
125 0 : GNUNET_PQ_query_param_uint64 (&offset),
126 0 : GNUNET_PQ_query_param_uint64 (&ulimit),
127 0 : TALER_PQ_query_param_amount (pg->conn,
128 : threshold),
129 : NULL != h_payto
130 0 : ? GNUNET_PQ_query_param_auto_from_type (h_payto)
131 0 : : GNUNET_PQ_query_param_null (),
132 : GNUNET_PQ_query_param_end
133 : };
134 : enum GNUNET_DB_QueryStatus qs;
135 :
136 0 : PREPARE (pg,
137 : "select_exchange_debit_transfers_inc",
138 : "SELECT"
139 : " wo.wireout_uuid AS serial_id"
140 : ",wt.payto_uri"
141 : ",wo.execution_date AS execution_time"
142 : ",wo.amount"
143 : " FROM wire_out wo"
144 : " LEFT JOIN wire_targets wt"
145 : " USING (wire_target_h_payto)"
146 : " WHERE (wo.wireout_uuid > $1)"
147 : " AND ( ($4::BYTEA IS NULL) OR (wt.h_normalized_payto=$4) )"
148 : " AND ( ( (wo.amount).val > ($3::taler_amount).val)"
149 : " OR ( ( (wo.amount).val >= ($3::taler_amount).val)"
150 : " AND ( (wo.amount).frac >= ($3::taler_amount).frac) ) )"
151 : " ORDER BY wo.wireout_uuid ASC"
152 : " LIMIT $2");
153 0 : PREPARE (pg,
154 : "select_exchange_debit_transfers_dec",
155 : "SELECT"
156 : " wo.wireout_uuid AS serial_id"
157 : ",wt.payto_uri"
158 : ",wo.execution_date AS execution_time"
159 : ",wo.amount"
160 : " FROM wire_out wo"
161 : " LEFT JOIN wire_targets wt"
162 : " USING (wire_target_h_payto)"
163 : " WHERE (wo.wireout_uuid < $1)"
164 : " AND ( ($4::BYTEA IS NULL) OR (wt.h_normalized_payto=$4) )"
165 : " AND ( ( (wo.amount).val > ($3::taler_amount).val)"
166 : " OR ( ( (wo.amount).val >= ($3::taler_amount).val)"
167 : " AND ( (wo.amount).frac >= ($3::taler_amount).frac) ) )"
168 : " ORDER BY wo.wireout_uuid DESC"
169 : " LIMIT $2");
170 0 : qs = GNUNET_PQ_eval_prepared_multi_select (
171 : pg->conn,
172 : (limit > 0)
173 : ? "select_exchange_debit_transfers_inc"
174 : : "select_exchange_debit_transfers_dec",
175 : params,
176 : &handle_transfer_cb,
177 : &stc);
178 0 : if (GNUNET_OK != stc.status)
179 0 : return GNUNET_DB_STATUS_HARD_ERROR;
180 0 : return qs;
181 : }
|
