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_refunds_above_serial_id.c
18 : * @brief Implementation of the select_refunds_above_serial_id 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_refunds_above_serial_id.h"
26 : #include "pg_helper.h"
27 :
28 : /**
29 : * Closure for #refunds_serial_helper_cb().
30 : */
31 : struct RefundsSerialContext
32 : {
33 :
34 : /**
35 : * Callback to call.
36 : */
37 : TALER_EXCHANGEDB_RefundCallback 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 RefundsSerialContext`
61 : * @param result the postgres result
62 : * @param num_results the number of results in @a result
63 : */
64 : static void
65 74 : refunds_serial_helper_cb (void *cls,
66 : PGresult *result,
67 : unsigned int num_results)
68 : {
69 74 : struct RefundsSerialContext *rsc = cls;
70 74 : struct PostgresClosure *pg = rsc->pg;
71 :
72 106 : for (unsigned int i = 0; i<num_results; i++)
73 : {
74 : struct TALER_EXCHANGEDB_Refund refund;
75 : struct TALER_DenominationPublicKey denom_pub;
76 : uint64_t rowid;
77 : bool full_refund;
78 32 : struct GNUNET_PQ_ResultSpec rs[] = {
79 32 : GNUNET_PQ_result_spec_auto_from_type ("merchant_pub",
80 : &refund.details.merchant_pub),
81 32 : GNUNET_PQ_result_spec_auto_from_type ("merchant_sig",
82 : &refund.details.merchant_sig),
83 32 : GNUNET_PQ_result_spec_auto_from_type ("h_contract_terms",
84 : &refund.details.h_contract_terms),
85 32 : GNUNET_PQ_result_spec_uint64 ("rtransaction_id",
86 : &refund.details.rtransaction_id),
87 32 : TALER_PQ_result_spec_denom_pub ("denom_pub",
88 : &denom_pub),
89 32 : GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
90 : &refund.coin.coin_pub),
91 32 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
92 : &refund.details.refund_amount),
93 32 : GNUNET_PQ_result_spec_uint64 ("refund_serial_id",
94 : &rowid),
95 : GNUNET_PQ_result_spec_end
96 : };
97 : enum GNUNET_GenericReturnValue ret;
98 :
99 32 : if (GNUNET_OK !=
100 32 : GNUNET_PQ_extract_result (result,
101 : rs,
102 : i))
103 : {
104 0 : GNUNET_break (0);
105 0 : rsc->status = GNUNET_SYSERR;
106 0 : return;
107 : }
108 : {
109 32 : struct GNUNET_PQ_QueryParam params[] = {
110 32 : GNUNET_PQ_query_param_uint64 (&rowid),
111 : GNUNET_PQ_query_param_end
112 : };
113 : struct TALER_Amount amount_with_fee;
114 : uint64_t s_f;
115 : uint64_t s_v;
116 32 : struct GNUNET_PQ_ResultSpec rs2[] = {
117 32 : GNUNET_PQ_result_spec_uint64 ("s_v",
118 : &s_v),
119 32 : GNUNET_PQ_result_spec_uint64 ("s_f",
120 : &s_f),
121 32 : TALER_PQ_RESULT_SPEC_AMOUNT ("amount_with_fee",
122 : &amount_with_fee),
123 : GNUNET_PQ_result_spec_end
124 : };
125 : enum GNUNET_DB_QueryStatus qs;
126 :
127 32 : qs = GNUNET_PQ_eval_prepared_singleton_select (
128 : pg->conn,
129 : "test_refund_full",
130 : params,
131 : rs2);
132 32 : if (qs <= 0)
133 : {
134 0 : GNUNET_break (0);
135 0 : rsc->status = GNUNET_SYSERR;
136 0 : return;
137 : }
138 : /* normalize */
139 32 : s_v += s_f / TALER_AMOUNT_FRAC_BASE;
140 32 : s_f %= TALER_AMOUNT_FRAC_BASE;
141 32 : full_refund = (s_v >= amount_with_fee.value) &&
142 0 : (s_f >= amount_with_fee.fraction);
143 : }
144 32 : ret = rsc->cb (rsc->cb_cls,
145 : rowid,
146 : &denom_pub,
147 : &refund.coin.coin_pub,
148 : &refund.details.merchant_pub,
149 : &refund.details.merchant_sig,
150 : &refund.details.h_contract_terms,
151 : refund.details.rtransaction_id,
152 : full_refund,
153 : &refund.details.refund_amount);
154 32 : GNUNET_PQ_cleanup_result (rs);
155 32 : if (GNUNET_OK != ret)
156 0 : break;
157 : }
158 : }
159 :
160 :
161 : enum GNUNET_DB_QueryStatus
162 74 : TEH_PG_select_refunds_above_serial_id (
163 : void *cls,
164 : uint64_t serial_id,
165 : TALER_EXCHANGEDB_RefundCallback cb,
166 : void *cb_cls)
167 : {
168 74 : struct PostgresClosure *pg = cls;
169 74 : struct GNUNET_PQ_QueryParam params[] = {
170 74 : GNUNET_PQ_query_param_uint64 (&serial_id),
171 : GNUNET_PQ_query_param_end
172 : };
173 74 : struct RefundsSerialContext rsc = {
174 : .cb = cb,
175 : .cb_cls = cb_cls,
176 : .pg = pg,
177 : .status = GNUNET_OK
178 : };
179 : enum GNUNET_DB_QueryStatus qs;
180 :
181 : /* Fetch refunds with rowid '\geq' the given parameter */
182 74 : PREPARE (pg,
183 : "audit_get_refunds_incr",
184 : "SELECT"
185 : " bdep.merchant_pub"
186 : ",ref.merchant_sig"
187 : ",bdep.h_contract_terms"
188 : ",ref.rtransaction_id"
189 : ",denom.denom_pub"
190 : ",kc.coin_pub"
191 : ",ref.amount_with_fee"
192 : ",ref.refund_serial_id"
193 : " FROM refunds ref"
194 : " JOIN batch_deposits bdep"
195 : " ON (ref.batch_deposit_serial_id=bdep.batch_deposit_serial_id)"
196 : " JOIN coin_deposits cdep"
197 : " ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
198 : " JOIN known_coins kc"
199 : " ON (cdep.coin_pub=kc.coin_pub)"
200 : " JOIN denominations denom"
201 : " ON (kc.denominations_serial=denom.denominations_serial)"
202 : " WHERE ref.refund_serial_id>=$1"
203 : " ORDER BY ref.refund_serial_id ASC;");
204 74 : PREPARE (pg,
205 : "test_refund_full",
206 : "SELECT"
207 : " CAST(SUM(CAST((ref.amount_with_fee).frac AS INT8)) AS INT8) AS s_f"
208 : ",CAST(SUM((ref.amount_with_fee).val) AS INT8) AS s_v"
209 : ",cdep.amount_with_fee"
210 : " FROM refunds ref"
211 : " JOIN coin_deposits cdep"
212 : " ON (ref.coin_pub=cdep.coin_pub AND ref.batch_deposit_serial_id=cdep.batch_deposit_serial_id)"
213 : " WHERE ref.refund_serial_id=$1"
214 : " GROUP BY (cdep.amount_with_fee);");
215 74 : qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
216 : "audit_get_refunds_incr",
217 : params,
218 : &refunds_serial_helper_cb,
219 : &rsc);
220 74 : if (GNUNET_OK != rsc.status)
221 0 : return GNUNET_DB_STATUS_HARD_ERROR;
222 74 : return qs;
223 : }
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