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_select_purse_deposits_by_purse.c
18 : * @brief Implementation of the select_purse_deposits_by_purse 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_select_purse_deposits_by_purse.h"
26 : #include "pg_helper.h"
27 :
28 : /**
29 : * Closure for #purse_refund_coin_helper_cb().
30 : */
31 : struct PurseRefundCoinContext
32 : {
33 :
34 : /**
35 : * Callback to call.
36 : */
37 : TALER_EXCHANGEDB_PurseRefundCoinCallback cb;
38 :
39 : /**
40 : * Closure for @e cb.
41 : */
42 : void *cb_cls;
43 :
44 : /**
45 : * Plugin context.
46 : */
47 : struct PostgresClosure *pg;
48 :
49 : /**
50 : * Status code, set to #GNUNET_SYSERR on hard errors.
51 : */
52 : enum GNUNET_GenericReturnValue status;
53 : };
54 :
55 :
56 : /**
57 : * Helper function to be called with the results of a SELECT statement
58 : * that has returned @a num_results results.
59 : *
60 : * @param cls closure of type `struct PurseRefundCoinContext`
61 : * @param result the postgres result
62 : * @param num_results the number of results in @a result
63 : */
64 : static void
65 0 : purse_refund_coin_helper_cb (void *cls,
66 : PGresult *result,
67 : unsigned int num_results)
68 : {
69 0 : struct PurseRefundCoinContext *dsc = cls;
70 0 : struct PostgresClosure *pg = dsc->pg;
71 :
72 0 : for (unsigned int i = 0; i<num_results; i++)
73 : {
74 : struct TALER_Amount amount_with_fee;
75 : struct TALER_CoinSpendPublicKeyP coin_pub;
76 : struct TALER_DenominationPublicKey denom_pub;
77 : uint64_t rowid;
78 0 : struct GNUNET_PQ_ResultSpec rs[] = {
79 0 : TALER_PQ_result_spec_denom_pub ("denom_pub",
80 : &denom_pub),
81 0 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
82 : &amount_with_fee),
83 0 : GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
84 : &coin_pub),
85 0 : GNUNET_PQ_result_spec_uint64 ("purse_deposit_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 : &amount_with_fee,
103 : &coin_pub,
104 : &denom_pub);
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 0 : TEH_PG_select_purse_deposits_by_purse (
114 : void *cls,
115 : const struct TALER_PurseContractPublicKeyP *purse_pub,
116 : TALER_EXCHANGEDB_PurseRefundCoinCallback cb,
117 : void *cb_cls)
118 : {
119 0 : struct PostgresClosure *pg = cls;
120 0 : struct GNUNET_PQ_QueryParam params[] = {
121 0 : GNUNET_PQ_query_param_auto_from_type (purse_pub),
122 : GNUNET_PQ_query_param_end
123 : };
124 0 : struct PurseRefundCoinContext dsc = {
125 : .cb = cb,
126 : .cb_cls = cb_cls,
127 : .pg = pg,
128 : .status = GNUNET_OK
129 : };
130 : enum GNUNET_DB_QueryStatus qs;
131 :
132 0 : PREPARE (pg,
133 : "audit_get_purse_deposits_by_purse",
134 : "SELECT"
135 : " pd.purse_deposit_serial_id"
136 : ",pd.amount_with_fee"
137 : ",pd.coin_pub"
138 : ",denom.denom_pub"
139 : " FROM purse_deposits pd"
140 : " JOIN known_coins kc"
141 : " USING (coin_pub)"
142 : " JOIN denominations denom"
143 : " USING (denominations_serial)"
144 : " WHERE purse_pub=$1;");
145 0 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
146 : "audit_get_purse_deposits_by_purse",
147 : params,
148 : &purse_refund_coin_helper_cb,
149 : &dsc);
150 0 : if (GNUNET_OK != dsc.status)
151 0 : return GNUNET_DB_STATUS_HARD_ERROR;
152 0 : return qs;
153 : }
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