aboutsummaryrefslogtreecommitdiff
path: root/src/auditor/taler-helper-auditor-deposits.c
blob: 1b6a46f1d43e7c35778f11d0b4bc569f7dbe4b19 (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
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
/*
  This file is part of TALER
  Copyright (C) 2016-2020 Taler Systems SA

  TALER is free software; you can redistribute it and/or modify it under the
  terms of the GNU Affero 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 Affero Public License for more details.

  You should have received a copy of the GNU Affero Public License along with
  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
*/
/**
 * @file auditor/taler-helper-auditor-deposits.c
 * @brief audits an exchange database for deposit confirmation consistency
 * @author Christian Grothoff
 *
 * We simply check that all of the deposit confirmations reported to us
 * by merchants were also reported to us by the exchange.
 */
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include "taler_auditordb_plugin.h"
#include "taler_exchangedb_lib.h"
#include "taler_json_lib.h"
#include "taler_bank_service.h"
#include "taler_signatures.h"
#include "report-lib.h"


/**
 * Return value from main().
 */
static int global_ret;

/**
 * Array of reports about missing deposit confirmations.
 */
static json_t *report_deposit_confirmation_inconsistencies;

/**
 * Total number of deposit confirmations that we did not get.
 */
static json_int_t number_missed_deposit_confirmations;

/**
 * Total amount involved in deposit confirmations that we did not get.
 */
static struct TALER_Amount total_missed_deposit_confirmations;


/**
 * Closure for #test_dc.
 */
struct DepositConfirmationContext
{

  /**
   * How many deposit confirmations did we NOT find in the #TALER_ARL_edb?
   */
  unsigned long long missed_count;

  /**
   * What is the total amount missing?
   */
  struct TALER_Amount missed_amount;

  /**
   * Lowest SerialID of the first coin we missed? (This is where we
   * should resume next time).
   */
  uint64_t first_missed_coin_serial;

  /**
   * Lowest SerialID of the first coin we missed? (This is where we
   * should resume next time).
   */
  uint64_t last_seen_coin_serial;

  /**
   * Success or failure of (exchange) database operations within
   * #test_dc.
   */
  enum GNUNET_DB_QueryStatus qs;

};


/**
 * Given a deposit confirmation from #TALER_ARL_adb, check that it is also
 * in #TALER_ARL_edb.  Update the deposit confirmation context accordingly.
 *
 * @param cls our `struct DepositConfirmationContext`
 * @param serial_id row of the @a dc in the database
 * @param dc the deposit confirmation we know
 */
static void
test_dc (void *cls,
         uint64_t serial_id,
         const struct TALER_AUDITORDB_DepositConfirmation *dc)
{
  struct DepositConfirmationContext *dcc = cls;

  dcc->last_seen_coin_serial = serial_id;
  {
    enum GNUNET_DB_QueryStatus qs;
    struct TALER_EXCHANGEDB_Deposit dep = {
      .coin.coin_pub = dc->coin_pub,
      .h_contract_terms = dc->h_contract_terms,
      .merchant_pub = dc->merchant,
      .h_wire = dc->h_wire,
      .refund_deadline = dc->refund_deadline
    };

    qs = TALER_ARL_edb->have_deposit (TALER_ARL_edb->cls,
                                      TALER_ARL_esession,
                                      &dep,
                                      GNUNET_NO /* do not check refund deadline */);
    if (qs > 0)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Found deposit %s in exchange database\n",
                  GNUNET_h2s (&dc->h_contract_terms));
      return; /* found, all good */
    }
    if (qs < 0)
    {
      GNUNET_break (0); /* DB error, complain */
      dcc->qs = qs;
      return;
    }
  }
  /* deposit confirmation missing! report! */
  TALER_ARL_report (report_deposit_confirmation_inconsistencies,
                    json_pack ("{s:o, s:o, s:I, s:o}",
                               "timestamp",
                               TALER_ARL_json_from_time_abs (dc->timestamp),
                               "amount",
                               TALER_JSON_from_amount (&dc->amount_without_fee),
                               "rowid",
                               (json_int_t) serial_id,
                               "account",
                               GNUNET_JSON_from_data_auto (&dc->h_wire)));
  dcc->first_missed_coin_serial = GNUNET_MIN (dcc->first_missed_coin_serial,
                                              serial_id);
  dcc->missed_count++;
  GNUNET_assert (GNUNET_OK ==
                 TALER_amount_add (&dcc->missed_amount,
                                   &dcc->missed_amount,
                                   &dc->amount_without_fee));
}


/**
 * Check that the deposit-confirmations that were reported to
 * us by merchants are also in the exchange's database.
 *
 * @param cls closure
 * @return transaction status code
 */
static enum GNUNET_DB_QueryStatus
analyze_deposit_confirmations (void *cls)
{
  struct TALER_AUDITORDB_ProgressPointDepositConfirmation ppdc;
  struct DepositConfirmationContext dcc;
  enum GNUNET_DB_QueryStatus qs;
  enum GNUNET_DB_QueryStatus qsx;
  enum GNUNET_DB_QueryStatus qsp;

  (void) cls;
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Analyzing deposit confirmations\n");
  ppdc.last_deposit_confirmation_serial_id = 0;
  qsp = TALER_ARL_adb->get_auditor_progress_deposit_confirmation (
    TALER_ARL_adb->cls,
    TALER_ARL_asession,
    &TALER_ARL_master_pub,
    &ppdc);
  if (0 > qsp)
  {
    GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qsp);
    return qsp;
  }
  if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qsp)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
                "First analysis using deposit auditor, starting audit from scratch\n");
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                "Resuming deposit confirmation audit at %llu\n",
                (unsigned long long) ppdc.last_deposit_confirmation_serial_id);
  }

  /* setup 'cc' */
  GNUNET_assert (GNUNET_OK ==
                 TALER_amount_get_zero (TALER_ARL_currency,
                                        &dcc.missed_amount));
  dcc.qs = GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
  dcc.missed_count = 0LLU;
  dcc.first_missed_coin_serial = UINT64_MAX;
  qsx = TALER_ARL_adb->get_deposit_confirmations (TALER_ARL_adb->cls,
                                                  TALER_ARL_asession,
                                                  &TALER_ARL_master_pub,
                                                  ppdc.
                                                  last_deposit_confirmation_serial_id,
                                                  &test_dc,
                                                  &dcc);
  if (0 > qsx)
  {
    GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qsx);
    return qsx;
  }
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Analyzed %d deposit confirmations (above serial ID %llu)\n",
              (int) qsx,
              (unsigned long long) ppdc.last_deposit_confirmation_serial_id);
  if (0 > dcc.qs)
  {
    GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == dcc.qs);
    return dcc.qs;
  }
  if (UINT64_MAX == dcc.first_missed_coin_serial)
    ppdc.last_deposit_confirmation_serial_id = dcc.last_seen_coin_serial;
  else
    ppdc.last_deposit_confirmation_serial_id = dcc.first_missed_coin_serial - 1;

  /* sync 'cc' back to disk */
  if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qsp)
    qs = TALER_ARL_adb->update_auditor_progress_deposit_confirmation (
      TALER_ARL_adb->cls,
      TALER_ARL_asession,
      &TALER_ARL_master_pub,
      &ppdc);
  else
    qs = TALER_ARL_adb->insert_auditor_progress_deposit_confirmation (
      TALER_ARL_adb->cls,
      TALER_ARL_asession,
      &TALER_ARL_master_pub,
      &ppdc);
  if (0 >= qs)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                "Failed to update auditor DB, not recording progress\n");
    GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
    return qs;
  }
  number_missed_deposit_confirmations = (json_int_t) dcc.missed_count;
  total_missed_deposit_confirmations = dcc.missed_amount;

  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Concluded deposit confirmation audit step at %llu\n",
              (unsigned long long) ppdc.last_deposit_confirmation_serial_id);
  return qs;
}


/**
 * Main function that will be run.
 *
 * @param cls closure
 * @param args remaining command-line arguments
 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
 * @param c configuration
 */
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  (void) cls;
  (void) args;
  (void) cfgfile;
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Launching deposit auditor\n");
  if (GNUNET_OK !=
      TALER_ARL_init (c))
  {
    global_ret = 1;
    return;
  }
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Starting deposit audit\n");
  GNUNET_assert (NULL !=
                 (report_deposit_confirmation_inconsistencies = json_array ()));
  if (GNUNET_OK !=
      TALER_ARL_setup_sessions_and_run (&analyze_deposit_confirmations,
                                        NULL))
  {
    global_ret = 1;
    return;
  }
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Deposit audit complete\n");
  {
    json_t *report;

    report = json_pack ("{s:o, s:I, s:o, s:o, s:o}",
                        "deposit_confirmation_inconsistencies",
                        report_deposit_confirmation_inconsistencies,
                        "missing_deposit_confirmation_count",
                        (json_int_t) number_missed_deposit_confirmations,
                        "missing_deposit_confirmation_total",
                        TALER_JSON_from_amount (
                          &total_missed_deposit_confirmations),
                        "auditor_start_time",
                        TALER_ARL_json_from_time_abs (
                          start_time),
                        "auditor_end_time",
                        TALER_ARL_json_from_time_abs (
                          GNUNET_TIME_absolute_get ())
                        );
    GNUNET_break (NULL != report);
    TALER_ARL_done (report);
  }
}


/**
 * The main function of the deposit auditing helper tool.
 *
 * @param argc number of arguments from the command line
 * @param argv command line arguments
 * @return 0 ok, 1 on error
 */
int
main (int argc,
      char *const *argv)
{
  const struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_base32_auto ('m',
                                      "exchange-key",
                                      "KEY",
                                      "public key of the exchange (Crockford base32 encoded)",
                                      &TALER_ARL_master_pub),
    GNUNET_GETOPT_option_timetravel ('T',
                                     "timetravel"),
    GNUNET_GETOPT_OPTION_END
  };

  /* force linker to link against libtalerutil; if we do
     not do this, the linker may "optimize" libtalerutil
     away and skip #TALER_OS_init(), which we do need */
  (void) TALER_project_data_default ();
  GNUNET_assert (GNUNET_OK ==
                 GNUNET_log_setup ("taler-helper-auditor-deposits",
                                   "MESSAGE",
                                   NULL));
  if (GNUNET_OK !=
      GNUNET_PROGRAM_run (argc,
                          argv,
                          "taler-helper-auditor-deposits",
                          "Audit Taler exchange database for deposit confirmation consistency",
                          options,
                          &run,
                          NULL))
    return 1;
  return global_ret;
}


/* end of taler-helper-auditor-deposits.c */