aboutsummaryrefslogtreecommitdiff
path: root/src/exchangedb/pg_select_recoup_above_serial_id.c
blob: 9047a86f8fd408c08615857f38474f28b4ec2c1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/*
   This file is part of TALER
   Copyright (C) 2022 Taler Systems SA

   TALER is free software; you can redistribute it and/or modify it under the
   terms of the GNU General Public License as published by the Free Software
   Foundation; either version 3, or (at your option) any later version.

   TALER is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along with
   TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */
/**
 * @file exchangedb/pg_select_recoup_above_serial_id.c
 * @brief Implementation of the select_recoup_above_serial_id function for Postgres
 * @author Christian Grothoff
 */
#include "platform.h"
#include "taler_error_codes.h"
#include "taler_dbevents.h"
#include "taler_pq_lib.h"
#include "pg_select_recoup_above_serial_id.h"
#include "pg_helper.h"



/**
 * Closure for #recoup_serial_helper_cb().
 */
struct RecoupSerialContext
{

  /**
   * Callback to call.
   */
  TALER_EXCHANGEDB_RecoupCallback cb;

  /**
   * Closure for @e cb.
   */
  void *cb_cls;

  /**
   * Plugin context.
   */
  struct PostgresClosure *pg;

  /**
   * Status code, set to #GNUNET_SYSERR on hard errors.
   */
  enum GNUNET_GenericReturnValue status;
};


/**
 * Helper function to be called with the results of a SELECT statement
 * that has returned @a num_results results.
 *
 * @param cls closure of type `struct RecoupSerialContext`
 * @param result the postgres result
 * @param num_results the number of results in @a result
 */
static void
recoup_serial_helper_cb (void *cls,
                         PGresult *result,
                         unsigned int num_results)
{
  struct RecoupSerialContext *psc = cls;
  struct PostgresClosure *pg = psc->pg;

  for (unsigned int i = 0; i<num_results; i++)
  {
    uint64_t rowid;
    struct TALER_ReservePublicKeyP reserve_pub;
    struct TALER_CoinPublicInfo coin;
    struct TALER_CoinSpendSignatureP coin_sig;
    union TALER_DenominationBlindingKeyP coin_blind;
    struct TALER_Amount amount;
    struct TALER_DenominationPublicKey denom_pub;
    struct TALER_BlindedCoinHashP h_blind_ev;
    struct GNUNET_TIME_Timestamp timestamp;
    struct GNUNET_PQ_ResultSpec rs[] = {
      GNUNET_PQ_result_spec_uint64 ("recoup_uuid",
                                    &rowid),
      GNUNET_PQ_result_spec_timestamp ("recoup_timestamp",
                                       &timestamp),
      GNUNET_PQ_result_spec_auto_from_type ("reserve_pub",
                                            &reserve_pub),
      GNUNET_PQ_result_spec_auto_from_type ("coin_pub",
                                            &coin.coin_pub),
      TALER_PQ_result_spec_denom_pub ("denom_pub",
                                      &denom_pub),
      GNUNET_PQ_result_spec_auto_from_type ("coin_sig",
                                            &coin_sig),
      GNUNET_PQ_result_spec_auto_from_type ("coin_blind",
                                            &coin_blind),
      GNUNET_PQ_result_spec_auto_from_type ("h_blind_ev",
                                            &h_blind_ev),
      GNUNET_PQ_result_spec_auto_from_type ("denom_pub_hash",
                                            &coin.denom_pub_hash),
      GNUNET_PQ_result_spec_allow_null (
        GNUNET_PQ_result_spec_auto_from_type ("age_commitment_hash",
                                              &coin.h_age_commitment),
        &coin.no_age_commitment),
      TALER_PQ_result_spec_denom_sig ("denom_sig",
                                      &coin.denom_sig),
      TALER_PQ_RESULT_SPEC_AMOUNT ("amount",
                                   &amount),
      GNUNET_PQ_result_spec_end
    };
    int ret;

    if (GNUNET_OK !=
        GNUNET_PQ_extract_result (result,
                                  rs,
                                  i))
    {
      GNUNET_break (0);
      psc->status = GNUNET_SYSERR;
      return;
    }
    ret = psc->cb (psc->cb_cls,
                   rowid,
                   timestamp,
                   &amount,
                   &reserve_pub,
                   &coin,
                   &denom_pub,
                   &coin_sig,
                   &coin_blind);
    GNUNET_PQ_cleanup_result (rs);
    if (GNUNET_OK != ret)
      break;
  }
}

enum GNUNET_DB_QueryStatus
TEH_PG_select_recoup_above_serial_id (
  void *cls,
  uint64_t serial_id,
  TALER_EXCHANGEDB_RecoupCallback cb,
  void *cb_cls)
{
  struct PostgresClosure *pg = cls;
  struct GNUNET_PQ_QueryParam params[] = {
    GNUNET_PQ_query_param_uint64 (&serial_id),
    GNUNET_PQ_query_param_end
  };
  struct RecoupSerialContext psc = {
    .cb = cb,
    .cb_cls = cb_cls,
    .pg = pg,
    .status = GNUNET_OK
  };
  enum GNUNET_DB_QueryStatus qs;

      /* Used in #postgres_select_recoup_above_serial_id() to obtain recoup transactions */
  PREPARE (pg,
           "recoup_get_incr",
           "SELECT"
           " recoup_uuid"
           ",recoup_timestamp"
           ",reserves.reserve_pub"
           ",coins.coin_pub"
           ",coin_sig"
           ",coin_blind"
           ",ro.h_blind_ev"
           ",denoms.denom_pub_hash"
           ",coins.denom_sig"
           ",coins.age_commitment_hash"
           ",denoms.denom_pub"
           ",amount_val"
           ",amount_frac"
           " FROM recoup"
           "    JOIN known_coins coins"
           "      USING (coin_pub)"
           "    JOIN reserves_out ro"
           "      USING (reserve_out_serial_id)"
           "    JOIN reserves"
           "      USING (reserve_uuid)"
           "    JOIN denominations denoms"
           "      ON (coins.denominations_serial = denoms.denominations_serial)"
           " WHERE recoup_uuid>=$1"
           " ORDER BY recoup_uuid ASC;");
  qs = GNUNET_PQ_eval_prepared_multi_select (pg->conn,
                                             "recoup_get_incr",
                                             params,
                                             &recoup_serial_helper_cb,
                                             &psc);
  if (GNUNET_OK != psc.status)
    return GNUNET_DB_STATUS_HARD_ERROR;
  return qs;
}