summaryrefslogtreecommitdiff
path: root/src/exchange-tools/taler-wire.c
blob: 7fc3b04165a342f63e4d7ad23354ccbf643df57d (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
397
398
399
400
401
402
/*
  This file is part of TALER
  Copyright (C) 2014--2019 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 taler-wire.c
 * @brief Utility for performing wire transfers.
 * @author Marcello Stanisci
 * @author Christian Grothoff
 */
#include <platform.h>
#include <gnunet/gnunet_util_lib.h>
#include "taler_util.h"
#include "taler_bank_service.h"

/**
 * If set to #GNUNET_YES, then we'll ask the bank for a list
 * of transactions from the account mentioned in the config
 * section.
 */
static int history;

/**
 * If set to #GNUNET_YES, then we'll ask the bank to execute a
 * wire transfer.
 */
static int transfer;

/**
 * Global return code.
 */
static unsigned int global_ret = 1;

/**
 * When a wire transfer is being performed, this value
 * specifies the amount to transfer.
 */
static struct TALER_Amount amount;

/**
 * Starting row.
 */
static unsigned long long start_row;

/**
 * Which config section has the credentials to access the bank.
 */
static char *account_section;

/**
 * URL identifying the account that is going to receive the
 * wire transfer.
 */
static char *destination_account_url;

/**
 * Handle for executing the wire transfer.
 */
static struct TALER_BANK_WireExecuteHandle *eh;

/**
 * Handle to ongoing history operation.
 */
static struct TALER_BANK_CreditHistoryHandle *hh;

/**
 * For authentication.
 */
static struct TALER_BANK_AuthenticationData auth;

/**
 * Handle to the context for interacting with the bank.
 */
static struct GNUNET_CURL_Context *ctx;

/**
 * Scheduler context for running the @e ctx.
 */
static struct GNUNET_CURL_RescheduleContext *rc;


/**
 * Callback used to process ONE entry in the transaction
 * history returned by the bank.
 *
 * @param cls closure
 * @param http_status HTTP status code from server
 * @param ec taler error code
 * @param serial_id identification of the position at
 *        which we are returning data
 * @param details details about the wire transfer
 * @param json original full response from server
 * @return #GNUNET_OK to continue, #GNUNET_SYSERR to
 *         abort iteration
 */
static int
history_cb (void *cls,
            unsigned int http_status,
            enum TALER_ErrorCode ec,
            uint64_t serial_id,
            const struct TALER_BANK_CreditDetails *details,
            const json_t *json)
{
  (void) cls;
  (void) ec;
  (void) http_status;
  (void) json;
  if (NULL == details)
  {
    fprintf (stdout,
             "End of transactions list.\n");
    global_ret = 0;
    GNUNET_SCHEDULER_shutdown ();
    return GNUNET_NO;
  }

  fprintf (stdout,
           "%llu: %s->%s (%s) over %s at %s\n",
           (unsigned long long) serial_id,
           details->debit_account_url,
           details->credit_account_url,
           TALER_B2S (&details->reserve_pub),
           TALER_amount2s (&details->amount),
           GNUNET_STRINGS_absolute_time_to_string (details->execution_date));
  return GNUNET_OK;
}


/**
 * Callback that processes the outcome of a wire transfer
 * execution.
 *
 * @param cls closure
 * @param response_code HTTP status code
 * @param ec taler error code
 * @param row_id unique ID of the wire transfer in the bank's records
 * @param timestamp when did the transaction go into effect
 */
static void
confirmation_cb (void *cls,
                 unsigned int response_code,
                 enum TALER_ErrorCode ec,
                 uint64_t row_id,
                 struct GNUNET_TIME_Absolute timestamp)
{
  (void) cls;
  if (MHD_HTTP_OK != response_code)
  {
    fprintf (stderr,
             "The wire transfer didn't execute correctly (%d).\n",
             ec);
    GNUNET_SCHEDULER_shutdown ();
    return;
  }

  fprintf (stdout,
           "Wire transfer #%llu executed successfully at %s.\n",
           (unsigned long long) row_id,
           GNUNET_STRINGS_absolute_time_to_string (timestamp));
  global_ret = 0;
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Ask the bank to execute a wire transfer.
 */
static void
execute_wire_transfer ()
{
  struct TALER_WireTransferIdentifierRawP wtid;
  void *buf;
  size_t buf_size;

  GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_NONCE,
                              &wtid,
                              sizeof (wtid));
  TALER_BANK_prepare_wire_transfer (destination_account_url,
                                    &amount,
                                    "http://exchange.example.com/",
                                    &wtid,
                                    &buf,
                                    &buf_size);
  eh = TALER_BANK_execute_wire_transfer (ctx,
                                         &auth,
                                         buf,
                                         buf_size,
                                         &confirmation_cb,
                                         NULL);
  if (NULL == eh)
  {
    fprintf (stderr,
             "Could not execute the wire transfer\n");
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
}


/**
 * Ask the bank the list of transactions for the bank account
 * mentioned in the config section given by the user.
 */
static void
execute_history ()
{
  hh = TALER_BANK_credit_history (ctx,
                                  &auth,
                                  start_row,
                                  -10,
                                  &history_cb,
                                  NULL);
  if (NULL == hh)
  {
    fprintf (stderr,
             "Could not request the transaction history.\n");
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
}


/**
 * Gets executed upon shutdown.  Main duty is wire-plugin unloading.
 *
 * @param cls closure.
 */
static void
do_shutdown (void *cls)
{
  (void) cls;
  if (NULL != ctx)
  {
    GNUNET_CURL_fini (ctx);
    ctx = NULL;
  }
  if (NULL != rc)
  {
    GNUNET_CURL_gnunet_rc_destroy (rc);
    rc = NULL;
  }
  if (NULL != hh)
  {
    TALER_BANK_credit_history_cancel (hh);
    hh = NULL;
  }
  if (NULL != eh)
  {
    TALER_BANK_execute_wire_transfer_cancel (eh);
    eh = NULL;
  }
  TALER_BANK_auth_free (&auth);
}


/**
 * 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 cfg configuration
 */
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *cfg)
{
  (void) cls;
  (void) args;
  (void) cfgfile;
  if (NULL == account_section)
  {
    fprintf (stderr,
             "The option: -s ACCOUNT-SECTION, is mandatory.\n");
    return;
  }
  if (GNUNET_OK !=
      TALER_BANK_auth_parse_cfg (cfg,
                                 account_section,
                                 &auth))
  {
    fprintf (stderr,
             "Authentication information not found in configuration section `%s'\n",
             account_section);
    GNUNET_SCHEDULER_shutdown ();
    return;
  }


  if (GNUNET_YES == history)
    execute_history ();
  else if (GNUNET_YES == transfer)
    execute_wire_transfer ();
  else
    fprintf (stderr,
             "Please give either --history/-H or --transfer/t\n");

  ctx = GNUNET_CURL_init (&GNUNET_CURL_gnunet_scheduler_reschedule,
                          &rc);
  rc = GNUNET_CURL_gnunet_rc_create (ctx);
  if (NULL == ctx)
  {
    GNUNET_break (0);
    return;
  }
  GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
                                 NULL);
}


/**
 * Main function of taler-wire.  This tool is used to command the
 * execution of wire transfers from the command line.  Its main
 * purpose is to test whether the bank and exchange can speak the
 * same protocol of a certain wire plugin.
 *
 * @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)
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_flag ('H',
                               "history",
                               "Ask to get a list of 10 transactions.",
                               &history),
    GNUNET_GETOPT_option_flag ('t',
                               "transfer",
                               "Execute a wire transfer.",
                               &transfer),
    GNUNET_GETOPT_option_ulong ('w',
                                "since-when",
                                "SW",
                                "When asking the bank for"
                                " transactions history, this"
                                " option commands that all the"
                                " results should have IDs settled"
                                " after SW.  If not given, then"
                                " the 10 youngest transactions"
                                " are returned.",
                                &start_row),
    GNUNET_GETOPT_option_mandatory
      (GNUNET_GETOPT_option_string ('s',
                                    "section",
                                    "ACCOUNT-SECTION",
                                    "Which config section has the credentials to access the bank.  Mandatory.\n",
                                    &account_section)),
    GNUNET_GETOPT_option_mandatory
      (TALER_getopt_get_amount ('a',
                                "amount",
                                "AMOUNT",
                                "Specify the amount to transfer.",
                                &amount)),
    GNUNET_GETOPT_option_mandatory
      (GNUNET_GETOPT_option_string ('d',
                                    "destination",
                                    "PAYTO-URL",
                                    "Destination account for the wire transfer.",
                                    &destination_account_url)),
    GNUNET_GETOPT_OPTION_END
  };
  int ret;

  GNUNET_assert
    (GNUNET_OK == GNUNET_log_setup ("taler-wire",
                                    "WARNING",
                                    NULL)); /* filename */
  ret = GNUNET_PROGRAM_run
          (argc,
          argv,
          "taler-wire",
          "CLI bank client.",
          options,
          &run,
          NULL);
  if (GNUNET_OK != ret)
    return ret;
  return global_ret;
}


/* end of taler-wire.c */