Line data Source code
1 : /*
2 : This file is part of TALER
3 : Copyright (C) 2026 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 src/exchangedb/iterate_aggregation_wtids_above_serial_id.c
18 : * @brief Implementation of the iterate_aggregation_wtids_above_serial_id function for Postgres
19 : * @author Christian Grothoff
20 : */
21 : #include "taler/taler_pq_lib.h"
22 : #include "helper.h"
23 : #include "exchange-database/iterate_aggregation_wtids_above_serial_id.h"
24 :
25 :
26 : /**
27 : * Closure for #aggregation_wtid_cb().
28 : */
29 : struct AggregationWtidContext
30 : {
31 : /**
32 : * Function to call for each aggregation.
33 : */
34 : TALER_EXCHANGEDB_AggregationWtidCallback cb;
35 :
36 : /**
37 : * Closure for @e cb.
38 : */
39 : void *cb_cls;
40 :
41 : /**
42 : * Query status to return.
43 : */
44 : enum GNUNET_DB_QueryStatus qs;
45 : };
46 :
47 :
48 : /**
49 : * Helper function for
50 : * #TALER_EXCHANGEDB_iterate_aggregation_wtids_above_serial_id().
51 : * To be called with the results of a SELECT statement
52 : * that has returned @a num_results results.
53 : *
54 : * @param cls closure of type `struct AggregationWtidContext *`
55 : * @param result the postgres result
56 : * @param num_results the number of results in @a result
57 : */
58 : static void
59 3 : aggregation_wtid_cb (void *cls,
60 : PGresult *result,
61 : unsigned int num_results)
62 : {
63 3 : struct AggregationWtidContext *awc = cls;
64 :
65 6 : for (unsigned int i = 0; i < num_results; i++)
66 : {
67 : uint64_t rowid;
68 : struct TALER_WireTransferIdentifierRawP wtid;
69 : struct TALER_FullPaytoHashP wire_target_h_payto;
70 : bool pending;
71 3 : struct GNUNET_PQ_ResultSpec rs[] = {
72 3 : GNUNET_PQ_result_spec_uint64 ("aggregation_serial_id",
73 : &rowid),
74 3 : GNUNET_PQ_result_spec_auto_from_type ("wtid_raw",
75 : &wtid),
76 3 : GNUNET_PQ_result_spec_auto_from_type ("wire_target_h_payto",
77 : &wire_target_h_payto),
78 3 : GNUNET_PQ_result_spec_bool ("pending",
79 : &pending),
80 : GNUNET_PQ_result_spec_end
81 : };
82 : enum GNUNET_GenericReturnValue rval;
83 :
84 3 : if (GNUNET_OK !=
85 3 : GNUNET_PQ_extract_result (result,
86 : rs,
87 : i))
88 : {
89 0 : GNUNET_break (0);
90 0 : awc->qs = GNUNET_DB_STATUS_HARD_ERROR;
91 0 : return;
92 : }
93 3 : awc->qs = i + 1;
94 3 : rval = awc->cb (awc->cb_cls,
95 : rowid,
96 : &wtid,
97 : &wire_target_h_payto,
98 : pending);
99 3 : GNUNET_PQ_cleanup_result (rs);
100 3 : if (GNUNET_OK != rval)
101 0 : break;
102 : }
103 : }
104 :
105 :
106 : enum GNUNET_DB_QueryStatus
107 3 : TALER_EXCHANGEDB_iterate_aggregation_wtids_above_serial_id (
108 : struct TALER_EXCHANGEDB_PostgresContext *pg,
109 : uint64_t serial_id,
110 : TALER_EXCHANGEDB_AggregationWtidCallback cb,
111 : TALER_EXCHANGEDB_AGGREGATION_WTID_RESULT_CLOSURE *cb_cls)
112 : {
113 3 : struct GNUNET_PQ_QueryParam params[] = {
114 3 : GNUNET_PQ_query_param_uint64 (&serial_id),
115 : GNUNET_PQ_query_param_end
116 : };
117 3 : struct AggregationWtidContext awc = {
118 : .cb = cb,
119 : .cb_cls = cb_cls
120 : };
121 : enum GNUNET_DB_QueryStatus qs;
122 :
123 : /* Rows that already have their `wire_out' are returned as well, flagged as
124 : not pending: the caller needs every serial ID to be able to advance its
125 : cursor past them, but knowing here that the transfer happened saves it
126 : from asking #TALER_EXCHANGEDB_get_pending_aggregation() -- a full
127 : recomputation of the transfer -- once per wire transfer the exchange ever
128 : made, which is what the first run after an upgrade would otherwise do. */
129 3 : PREPARE (pg,
130 : "iterate_aggregation_wtids_above_serial_id",
131 : "SELECT"
132 : " atr.aggregation_serial_id"
133 : ",atr.wtid_raw"
134 : ",bdep.wire_target_h_payto"
135 : ",NOT EXISTS ("
136 : " SELECT 1"
137 : " FROM wire_out wo"
138 : " WHERE wo.wtid_raw=atr.wtid_raw"
139 : " ) AS pending"
140 : " FROM aggregation_tracking atr"
141 : " JOIN batch_deposits bdep"
142 : " USING (batch_deposit_serial_id)"
143 : " WHERE atr.aggregation_serial_id>=$1"
144 : " ORDER BY atr.aggregation_serial_id ASC;");
145 3 : qs = GNUNET_PQ_eval_prepared_multi_select (
146 : pg->conn,
147 : "iterate_aggregation_wtids_above_serial_id",
148 : params,
149 : &aggregation_wtid_cb,
150 : &awc);
151 3 : if (qs > 0)
152 2 : return awc.qs;
153 1 : GNUNET_break (GNUNET_DB_STATUS_HARD_ERROR != qs);
154 1 : return qs;
155 : }
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