aboutsummaryrefslogtreecommitdiff
path: root/src/testing/testing_api_cmd_bank_transfer.c
blob: 8c14aac19d04462bdf74c3bf642715cdfdbdc676 (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
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
/*
  This file is part of TALER
  Copyright (C) 2018-2021 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 testing/testing_api_cmd_bank_transfer.c
 * @brief implementation of a bank /transfer command
 * @author Christian Grothoff
 * @author Marcello Stanisci
 */
#include "platform.h"
#include "backoff.h"
#include "taler_json_lib.h"
#include <gnunet/gnunet_curl_lib.h>
#include "taler_bank_service.h"
#include "taler_fakebank_lib.h"
#include "taler_signatures.h"
#include "taler_testing_lib.h"


/**
 * How often do we retry before giving up?
 */
#define NUM_RETRIES 5


/**
 * State for a "transfer" CMD.
 */
struct TransferState
{

  /**
   * Wire transfer amount.
   */
  struct TALER_Amount amount;

  /**
   * Base URL of the debit account.
   */
  const char *account_debit_url;

  /**
   * Money receiver payto URL.
   */
  char *payto_debit_account;

  /**
   * Money receiver account URL.
   */
  const char *payto_credit_account;

  /**
   * Username to use for authentication.
   */
  struct TALER_BANK_AuthenticationData auth;

  /**
   * Base URL of the exchange.
   */
  const char *exchange_base_url;

  /**
   * Wire transfer identifier to use.
   */
  struct TALER_WireTransferIdentifierRawP wtid;

  /**
   * Handle to the pending request at the fakebank.
   */
  struct TALER_BANK_TransferHandle *weh;

  /**
   * Interpreter state.
   */
  struct TALER_TESTING_Interpreter *is;

  /**
   * Set to the wire transfer's unique ID.
   */
  uint64_t serial_id;

  /**
   * Timestamp of the transaction (as returned from the bank).
   */
  struct GNUNET_TIME_Timestamp timestamp;

  /**
   * Configuration filename.  Used to get the tip reserve key
   * filename (used to obtain a public key to write in the
   * transfer subject).
   */
  const char *config_filename;

  /**
   * Task scheduled to try later.
   */
  struct GNUNET_SCHEDULER_Task *retry_task;

  /**
   * How long do we wait until we retry?
   */
  struct GNUNET_TIME_Relative backoff;

  /**
   * Was this command modified via
   * #TALER_TESTING_cmd_admin_add_incoming_with_retry to
   * enable retries? If so, how often should we still retry?
   */
  unsigned int do_retry;
};


/**
 * Run the "transfer" CMD.
 *
 * @param cls closure.
 * @param cmd CMD being run.
 * @param is interpreter state.
 */
static void
transfer_run (void *cls,
              const struct TALER_TESTING_Command *cmd,
              struct TALER_TESTING_Interpreter *is);


/**
 * Task scheduled to re-try #transfer_run.
 *
 * @param cls a `struct TransferState`
 */
static void
do_retry (void *cls)
{
  struct TransferState *fts = cls;

  fts->retry_task = NULL;
  fts->is->commands[fts->is->ip].last_req_time
    = GNUNET_TIME_absolute_get ();
  transfer_run (fts,
                NULL,
                fts->is);
}


/**
 * This callback will process the fakebank response to the wire
 * transfer.  It just checks whether the HTTP response code is
 * acceptable.
 *
 * @param cls closure with the interpreter state
 * @param http_status HTTP response code, #MHD_HTTP_OK (200) for
 *        successful status request; 0 if the exchange's reply is
 *        bogus (fails to follow the protocol)
 * @param ec taler-specific error code, #TALER_EC_NONE on success
 * @param serial_id unique ID of the wire transfer
 * @param timestamp time stamp of the transaction made.
 */
static void
confirmation_cb (void *cls,
                 unsigned int http_status,
                 enum TALER_ErrorCode ec,
                 uint64_t serial_id,
                 struct GNUNET_TIME_Timestamp timestamp)
{
  struct TransferState *fts = cls;
  struct TALER_TESTING_Interpreter *is = fts->is;

  fts->weh = NULL;
  if (MHD_HTTP_OK != http_status)
  {
    if (0 != fts->do_retry)
    {
      fts->do_retry--;
      if ( (0 == http_status) ||
           (TALER_EC_GENERIC_DB_SOFT_FAILURE == ec) ||
           (MHD_HTTP_INTERNAL_SERVER_ERROR == http_status) )
      {
        GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                    "Retrying transfer failed with %u/%d\n",
                    http_status,
                    (int) ec);
        /* on DB conflicts, do not use backoff */
        if (TALER_EC_GENERIC_DB_SOFT_FAILURE == ec)
          fts->backoff = GNUNET_TIME_UNIT_ZERO;
        else
          fts->backoff = EXCHANGE_LIB_BACKOFF (fts->backoff);
        fts->is->commands[fts->is->ip].num_tries++;
        fts->retry_task
          = GNUNET_SCHEDULER_add_delayed (fts->backoff,
                                          &do_retry,
                                          fts);
        return;
      }
    }
    GNUNET_break (0);
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Bank returned HTTP status %u/%d\n",
                http_status,
                (int) ec);
    TALER_TESTING_interpreter_fail (is);
    return;
  }

  fts->serial_id = serial_id;
  fts->timestamp = timestamp;
  TALER_TESTING_interpreter_next (is);
}


/**
 * Run the "transfer" CMD.
 *
 * @param cls closure.
 * @param cmd CMD being run.
 * @param is interpreter state.
 */
static void
transfer_run (void *cls,
              const struct TALER_TESTING_Command *cmd,
              struct TALER_TESTING_Interpreter *is)
{
  struct TransferState *fts = cls;
  void *buf;
  size_t buf_size;

  (void) cmd;
  GNUNET_log (GNUNET_ERROR_TYPE_INFO,
              "Transfer of %s from %s to %s\n",
              TALER_amount2s (&fts->amount),
              fts->account_debit_url,
              fts->payto_credit_account);
  TALER_BANK_prepare_transfer (fts->payto_credit_account,
                               &fts->amount,
                               fts->exchange_base_url,
                               &fts->wtid,
                               &buf,
                               &buf_size);
  fts->is = is;
  fts->weh
    = TALER_BANK_transfer (
        TALER_TESTING_interpreter_get_context (is),
        &fts->auth,
        buf,
        buf_size,
        &confirmation_cb,
        fts);
  GNUNET_free (buf);
  if (NULL == fts->weh)
  {
    GNUNET_break (0);
    TALER_TESTING_interpreter_fail (is);
    return;
  }
}


/**
 * Free the state of a "fakebank transfer" CMD, and possibly
 * cancel a pending operation thereof.
 *
 * @param cls closure
 * @param cmd current CMD being cleaned up.
 */
static void
transfer_cleanup (void *cls,
                  const struct TALER_TESTING_Command *cmd)
{
  struct TransferState *fts = cls;

  if (NULL != fts->weh)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                "Command %s did not complete\n",
                cmd->label);
    TALER_BANK_transfer_cancel (fts->weh);
    fts->weh = NULL;
  }
  if (NULL != fts->retry_task)
  {
    GNUNET_SCHEDULER_cancel (fts->retry_task);
    fts->retry_task = NULL;
  }
  GNUNET_free (fts->payto_debit_account);
  GNUNET_free (fts);
}


/**
 * Offer internal data from a "fakebank transfer" CMD to other
 * commands.
 *
 * @param cls closure.
 * @param[out] ret result
 * @param trait name of the trait.
 * @param index index number of the object to offer.
 * @return #GNUNET_OK on success.
 */
static enum GNUNET_GenericReturnValue
transfer_traits (void *cls,
                 const void **ret,
                 const char *trait,
                 unsigned int index)
{
  struct TransferState *fts = cls;
  struct TALER_TESTING_Trait traits[] = {
    TALER_TESTING_make_trait_exchange_url (
      (const char **) &fts->exchange_base_url),
    TALER_TESTING_make_trait_bank_row (&fts->serial_id),
    TALER_TESTING_make_trait_credit_payto_uri (
      (const char **) &fts->payto_credit_account),
    TALER_TESTING_make_trait_debit_payto_uri (
      (const char **) &fts->payto_debit_account),
    TALER_TESTING_make_trait_amount (&fts->amount),
    TALER_TESTING_make_trait_timestamp (0, &fts->timestamp),
    TALER_TESTING_make_trait_wtid (&fts->wtid),
    TALER_TESTING_trait_end ()
  };

  return TALER_TESTING_get_trait (traits,
                                  ret,
                                  trait,
                                  index);
}


struct TALER_TESTING_Command
TALER_TESTING_cmd_transfer (const char *label,
                            const char *amount,
                            const struct TALER_BANK_AuthenticationData *auth,
                            const char *payto_debit_account,
                            const char *payto_credit_account,
                            const struct TALER_WireTransferIdentifierRawP *wtid,
                            const char *exchange_base_url)
{
  struct TransferState *fts;

  fts = GNUNET_new (struct TransferState);
  fts->account_debit_url = auth->wire_gateway_url;
  fts->exchange_base_url = exchange_base_url;
  fts->payto_debit_account = GNUNET_strdup (payto_debit_account);
  fts->payto_credit_account = payto_credit_account;
  fts->auth = *auth;
  fts->wtid = *wtid;
  if (GNUNET_OK !=
      TALER_string_to_amount (amount,
                              &fts->amount))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to parse amount `%s' at %s\n",
                amount,
                label);
    GNUNET_assert (0);
  }

  {
    struct TALER_TESTING_Command cmd = {
      .cls = fts,
      .label = label,
      .run = &transfer_run,
      .cleanup = &transfer_cleanup,
      .traits = &transfer_traits
    };

    return cmd;
  }
}


struct TALER_TESTING_Command
TALER_TESTING_cmd_transfer_retry (struct TALER_TESTING_Command cmd)
{
  struct TransferState *fts;

  GNUNET_assert (&transfer_run == cmd.run);
  fts = cmd.cls;
  fts->do_retry = NUM_RETRIES;
  return cmd;
}


/* end of testing_api_cmd_bank_transfer.c */