aboutsummaryrefslogtreecommitdiff
path: root/src/exchangedb/pg_add_policy_fulfillment_proof.c
blob: 103de7ad23405827b5aa9f5268845c8972f76f22 (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
/*
   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_add_policy_fulfillment_proof.c
 * @brief Implementation of the add_policy_fulfillment_proof 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_add_policy_fulfillment_proof.h"
#include "pg_helper.h"


/**
 * Compares two indices into an array of hash codes according to
 * GNUNET_CRYPTO_hash_cmp of the content at those index positions.
 *
 * Used in a call qsort_t in order to generate sorted policy_hash_codes.
 */
static int
hash_code_cmp (
  const void *hc1,
  const void *hc2,
  void *arg)
{
  size_t i1 = *(size_t *) hc1;
  size_t i2 = *(size_t *) hc2;
  const struct TALER_PolicyDetails *d = arg;

  return GNUNET_CRYPTO_hash_cmp (&d[i1].hash_code,
                                 &d[i2].hash_code);
}


enum GNUNET_DB_QueryStatus
TEH_PG_add_policy_fulfillment_proof (
  void *cls,
  struct TALER_PolicyFulfillmentTransactionData *fulfillment)
{
  enum GNUNET_DB_QueryStatus qs;
  struct PostgresClosure *pg = cls;
  size_t count = fulfillment->details_count;
  struct GNUNET_HashCode hcs[count];

  /* Create the sorted policy_hash_codes */
  {
    size_t idx[count];
    for (size_t i = 0; i < count; i++)
      idx[i] = i;

    /* Sort the indices according to the hash codes of the corresponding
     * details. */
    qsort_r (idx,
             count,
             sizeof(size_t),
             hash_code_cmp,
             fulfillment->details);

    /* Finally, concatenate all hash_codes in sorted order */
    for (size_t i = 0; i < count; i++)
      hcs[i] = fulfillment->details[idx[i]].hash_code;
  }


  /* Now, add the proof to the policy_fulfillments table, retrieve the
   * record_id */
  {
    struct GNUNET_PQ_QueryParam params[] = {
      GNUNET_PQ_query_param_timestamp (&fulfillment->timestamp),
      TALER_PQ_query_param_json (fulfillment->proof),
      GNUNET_PQ_query_param_auto_from_type (&fulfillment->h_proof),
      GNUNET_PQ_query_param_fixed_size (hcs,
                                        count * sizeof(struct GNUNET_HashCode)),
      GNUNET_PQ_query_param_end
    };
    struct GNUNET_PQ_ResultSpec rs[] = {
      GNUNET_PQ_result_spec_uint64 ("fulfillment_id",
                                    &fulfillment->fulfillment_id),
      GNUNET_PQ_result_spec_end
    };


    qs = GNUNET_PQ_eval_prepared_singleton_select (pg->conn,
                                                   "insert_proof_into_policy_fulfillments",
                                                   params,
                                                   rs);
    if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
      return qs;
  }

  /* Now, set the states of each entry corresponding to the hash_codes in
   * policy_details accordingly */
  for (size_t i = 0; i < count; i++)
  {
    struct TALER_PolicyDetails *pos = &fulfillment->details[i];
    {
      struct GNUNET_PQ_QueryParam params[] = {
        GNUNET_PQ_query_param_auto_from_type (&pos->hash_code),
        GNUNET_PQ_query_param_timestamp (&pos->deadline),
        TALER_PQ_query_param_amount (&pos->commitment),
        TALER_PQ_query_param_amount (&pos->accumulated_total),
        TALER_PQ_query_param_amount (&pos->policy_fee),
        TALER_PQ_query_param_amount (&pos->transferable_amount),
        GNUNET_PQ_query_param_auto_from_type (&pos->fulfillment_state),
        GNUNET_PQ_query_param_end
      };

      qs = GNUNET_PQ_eval_prepared_non_select (pg->conn,
                                               "update_policy_details",
                                               params);
      if (qs < 0)
        return qs;
    }
  }

  return qs;
}