aboutsummaryrefslogtreecommitdiff
path: root/src/include/taler_error_codes.h
blob: 30df731c02b5476b0cad872c22888d06790a7b18 (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
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
/*
  This file is part of TALER
  Copyright (C) 2016, 2017, 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_error_codes.h
 * @brief error codes returned by GNU Taler
 *
 * This file defines constants for error codes returned
 * in Taler APIs.  We use codes above 1000 to avoid any
 * confusing with HTTP status codes.  All constants have the
 * shared prefix "TALER_EC_" to indicate that they are error
 * codes.
 *
 * THIS FILE IS AUTO-GENERATED, DO NOT MODIFY!
 * If you want to add an error code, please add it in the
 * taler-util.git repository.  Instructions
 * for this are in the README in taler-util.git.
 */
#ifndef TALER_ERROR_CODES_H
#define TALER_ERROR_CODES_H

/**
 * Enumeration with all possible Taler error codes.
 */
enum TALER_ErrorCode
{

  /**
   * Special code to indicate no error (or no "code" present).
   */
  TALER_EC_NONE = 0,

  /**
   * Special code to indicate that a non-integer error code was returned
   * in the JSON response.
   */
  TALER_EC_INVALID = 1,

  /**
   * The response we got from the server was not even in JSON format.
   */
  TALER_EC_INVALID_RESPONSE = 2,

  /**
   * Generic implementation error: this function was not yet
   * implemented.
   */
  TALER_EC_NOT_IMPLEMENTED = 3,

  /**
   * Exchange is badly configured and thus cannot operate.
   */
  TALER_EC_EXCHANGE_BAD_CONFIGURATION = 4,

  /**
   * Internal assertion error.
   */
  TALER_EC_INTERNAL_INVARIANT_FAILURE = 5,

  /**
   * Operation timed out.
   */
  TALER_EC_TIMEOUT = 6,

  /**
   * Exchange failed to allocate memory for building JSON reply.
   */
  TALER_EC_JSON_ALLOCATION_FAILURE = 7,

  /**
   * The exchange failed to even just initialize its connection to the
   * database.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DB_SETUP_FAILED = 1001,

  /**
   * The exchange encountered an error event to just start the database
   * transaction.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DB_START_FAILED = 1002,

  /**
   * The exchange encountered an error event to commit the database
   * transaction (hard, unrecoverable error). This response is provided
   * with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DB_COMMIT_FAILED_HARD = 1003,

  /**
   * The exchange encountered an error event to commit the database
   * transaction, even after repeatedly retrying it there was always a
   * conflicting transaction. (This indicates a repeated serialization
   * error; should only happen if some client maliciously tries to
   * create conflicting concurrent transactions.) This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DB_COMMIT_FAILED_ON_RETRY = 1004,

  /**
   * The exchange had insufficient memory to parse the request. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PARSER_OUT_OF_MEMORY = 1005,

  /**
   * The JSON in the client's request to the exchange was malformed.
   * (Generic parse error). This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_JSON_INVALID = 1006,

  /**
   * The JSON in the client's request to the exchange was malformed.
   * Details about the location of the parse error are provided. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_JSON_INVALID_WITH_DETAILS = 1007,

  /**
   * A required parameter in the request to the exchange was missing.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PARAMETER_MISSING = 1008,

  /**
   * A parameter in the request to the exchange was malformed. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PARAMETER_MALFORMED = 1009,

  /**
   * The exchange failed to obtain the transaction history of the given
   * coin from the database while generating an insufficient funds
   * errors.  This can happen during /deposit or /payback requests. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_COIN_HISTORY_DB_ERROR_INSUFFICIENT_FUNDS = 1010,

  /**
   * Internal logic error.  Some server-side function failed that really
   * should not. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_INTERNAL_LOGIC_ERROR = 1011,

  /**
   * The method specified in a payto:// URI is not one we expected.
   */
  TALER_EC_PAYTO_WRONG_METHOD = 1012,

  /**
   * The payto:// URI is malformed.
   */
  TALER_EC_PAYTO_MALFORMED = 1013,

  /**
   * We failed to update the database of known coins.
   */
  TALER_EC_DB_COIN_HISTORY_STORE_ERROR = 1014,

  /**
   * The given reserve does not have sufficient funds to admit the
   * requested withdraw operation at this time.  The response includes
   * the current "balance" of the reserve as well as the transaction
   * "history" that lead to this balance.  This response is provided
   * with HTTP status code MHD_HTTP_CONFLICT.
   */
  TALER_EC_WITHDRAW_INSUFFICIENT_FUNDS = 1100,

  /**
   * The exchange has no information about the "reserve_pub" that was
   * given. This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_WITHDRAW_RESERVE_UNKNOWN = 1101,

  /**
   * The amount to withdraw together with the fee exceeds the numeric
   * range for Taler amounts.  This is not a client failure, as the coin
   * value and fees come from the exchange's configuration. This
   * response is provided with HTTP status code MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_AMOUNT_FEE_OVERFLOW = 1102,

  /**
   * All of the deposited amounts into this reserve total up to a value
   * that is too big for the numeric range for Taler amounts. This is
   * not a client failure, as the transaction history comes from the
   * exchange's configuration.  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_AMOUNT_DEPOSITS_OVERFLOW = 1103,

  /**
   * For one of the historic withdrawals from this reserve, the exchange
   * could not find the denomination key. This is not a client failure,
   * as the transaction history comes from the exchange's configuration.
   * This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_HISTORIC_DENOMINATION_KEY_NOT_FOUND = 1104,

  /**
   * All of the withdrawals from reserve total up to a value that is too
   * big for the numeric range for Taler amounts. This is not a client
   * failure, as the transaction history comes from the exchange's
   * configuration.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_AMOUNT_WITHDRAWALS_OVERFLOW = 1105,

  /**
   * The exchange somehow knows about this reserve, but there seem to
   * have been no wire transfers made.  This is not a client failure, as
   * this is a database consistency issue of the exchange.  This
   * response is provided with HTTP status code MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_RESERVE_WITHOUT_WIRE_TRANSFER = 1106,

  /**
   * The exchange failed to create the signature using the denomination
   * key.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_SIGNATURE_FAILED = 1107,

  /**
   * The exchange failed to store the withdraw operation in its
   * database.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_DB_STORE_ERROR = 1108,

  /**
   * The exchange failed to check against historic withdraw data from
   * database (as part of ensuring the idempotency of the operation).
   * This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_WITHDRAW_DB_FETCH_ERROR = 1109,

  /**
   * The exchange is not aware of the denomination key the wallet
   * requested for the withdrawal. This response is provided with HTTP
   * status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_WITHDRAW_DENOMINATION_KEY_NOT_FOUND = 1110,

  /**
   * The signature of the reserve is not valid.  This response is
   * provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_WITHDRAW_RESERVE_SIGNATURE_INVALID = 1111,

  /**
   * When computing the reserve history, we ended up with a negative
   * overall balance, which should be impossible. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_WITHDRAW_HISTORY_DB_ERROR_INSUFFICIENT_FUNDS = 1112,

  /**
   * When computing the reserve history, we ended up with a negative
   * overall balance, which should be impossible. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_WITHDRAW_RESERVE_HISTORY_IMPOSSIBLE = 1113,

  /**
   * Validity period of the coin to be withdrawn is in the future.
   * Returned with an HTTP status of #MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_WITHDRAW_VALIDITY_IN_FUTURE = 1114,

  /**
   * Withdraw period of the coin to be withdrawn is in the past.
   * Returned with an HTTP status of #MHD_HTTP_GONE.
   */
  TALER_EC_WITHDRAW_VALIDITY_IN_PAST = 1115,

  /**
   * Withdraw period of the coin to be withdrawn is in the past.
   * Returned with an HTTP status of #MHD_HTTP_GONE.
   */
  TALER_EC_DENOMINATION_KEY_LOST = 1116,

  /**
   * The exchange failed to obtain the transaction history of the given
   * reserve from the database. This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_RESERVE_STATUS_DB_ERROR = 1150,

  /**
   * The reserve status was requested using a unknown key, to be
   * returned with 404 Not Found.
   */
  TALER_EC_RESERVE_STATUS_UNKNOWN = 1151,

  /**
   * The respective coin did not have sufficient residual value for the
   * /deposit operation (i.e. due to double spending). The "history" in
   * the respose provides the transaction history of the coin proving
   * this fact.  This response is provided with HTTP status code
   * MHD_HTTP_CONFLICT.
   */
  TALER_EC_DEPOSIT_INSUFFICIENT_FUNDS = 1200,

  /**
   * The exchange failed to obtain the transaction history of the given
   * coin from the database (this does not happen merely because the
   * coin is seen by the exchange for the first time). This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DEPOSIT_HISTORY_DB_ERROR = 1201,

  /**
   * The exchange failed to store the /depost information in the
   * database.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DEPOSIT_STORE_DB_ERROR = 1202,

  /**
   * The exchange database is unaware of the denomination key that
   * signed the coin (however, the exchange process is; this is not
   * supposed to happen; it can happen if someone decides to purge the
   * DB behind the back of the exchange process).  Hence the deposit is
   * being refused.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DEPOSIT_DB_DENOMINATION_KEY_UNKNOWN = 1203,

  /**
   * The exchange database is unaware of the denomination key that
   * signed the coin (however, the exchange process is; this is not
   * supposed to happen; it can happen if someone decides to purge the
   * DB behind the back of the exchange process).  Hence the deposit is
   * being refused.  This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.  FIXME: This is wrong / copy&paste error.
   */
  TALER_EC_DEPOSIT_DENOMINATION_KEY_UNKNOWN = 1204,

  /**
   * The signature made by the coin over the deposit permission is not
   * valid.  This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_COIN_SIGNATURE_INVALID = 1205,

  /**
   * The signature of the denomination key over the coin is not valid.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_DENOMINATION_SIGNATURE_INVALID = 1206,

  /**
   * The stated value of the coin after the deposit fee is subtracted
   * would be negative.  This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_NEGATIVE_VALUE_AFTER_FEE = 1207,

  /**
   * The stated refund deadline is after the wire deadline. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_REFUND_DEADLINE_AFTER_WIRE_DEADLINE = 1208,

  /**
   * The exchange does not recognize the validity of or support the
   * given wire format type. This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_TYPE = 1209,

  /**
   * The exchange failed to canonicalize and hash the given wire format.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.  FIXME: The naming and description is weird,
   * as we don't really do JSON anymore for the wire details.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_JSON = 1210,

  /**
   * The hash of the given wire address does not match the hash
   * specified in the proposal data.  This response is provided with
   * HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_CONTRACT_HASH_CONFLICT = 1211,

  /**
   * The exchange detected that the given account number is invalid for
   * the selected wire format type.  This response is provided with HTTP
   * status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_ACCOUNT_NUMBER = 1213,

  /**
   * The signature over the given wire details is invalid. This response
   * is provided with HTTP status code MHD_HTTP_BAD_REQUEST.  FIXME:
   * Seems to be unused.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_SIGNATURE = 1214,

  /**
   * The bank specified in the wire transfer format is not supported by
   * this exchange. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.  FIXME: Seems to be unused.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_BANK = 1215,

  /**
   * No wire format type was specified in the JSON wire format details.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.  FIXME: Seems to be unused.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_TYPE_MISSING = 1216,

  /**
   * The given wire format type is not supported by this exchange. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   * FIXME: Seems to be unused.
   */
  TALER_EC_DEPOSIT_INVALID_WIRE_FORMAT_TYPE_UNSUPPORTED = 1217,

  /**
   * Timestamp included in deposit permission is intolerably far off
   * with respect to the clock of the exchange.
   */
  TALER_EC_DEPOSIT_INVALID_TIMESTAMP = 1218,

  /**
   * Validity period of the denomination key is in the future.  Returned
   * with an HTTP status of MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_DEPOSIT_DENOMINATION_VALIDITY_IN_FUTURE = 1219,

  /**
   * Denomination key of the coin is past the deposit deadline.
   * Returned with an HTTP status of #MHD_HTTP_GONE.
   */
  TALER_EC_DEPOSIT_DENOMINATION_EXPIRED = 1220,

  /**
   * The respective coin did not have sufficient residual value for the
   * /refresh/melt operation.  The "history" in this response provdes
   * the "residual_value" of the coin, which may be less than its
   * "original_value".  This response is provided with HTTP status code
   * MHD_HTTP_CONFLICT.
   */
  TALER_EC_REFRESH_MELT_INSUFFICIENT_FUNDS = 1300,

  /**
   * The respective coin did not have sufficient residual value for the
   * /refresh/melt operation.  The "history" in this response provdes
   * the "residual_value" of the coin, which may be less than its
   * "original_value".  This response is provided with HTTP status code
   * MHD_HTTP_CONFLICT.
   */
  TALER_EC_TALER_EC_REFRESH_MELT_DENOMINATION_KEY_NOT_FOUND = 1301,

  /**
   * The exchange had an internal error reconstructing the transaction
   * history of the coin that was being melted. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFRESH_MELT_COIN_HISTORY_COMPUTATION_FAILED = 1302,

  /**
   * The exchange failed to check against historic melt data from
   * database (as part of ensuring the idempotency of the operation).
   * This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_MELT_DB_FETCH_ERROR = 1303,

  /**
   * The exchange failed to store session data in the database. This
   * response is provided with HTTP status code MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_MELT_DB_STORE_SESSION_ERROR = 1304,

  /**
   * The exchange encountered melt fees exceeding the melted coin's
   * contribution.  This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_MELT_FEES_EXCEED_CONTRIBUTION = 1305,

  /**
   * The denomination key signature on the melted coin is invalid. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_MELT_DENOMINATION_SIGNATURE_INVALID = 1306,

  /**
   * The signature made with the coin to be melted is invalid. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_MELT_COIN_SIGNATURE_INVALID = 1307,

  /**
   * The exchange failed to obtain the transaction history of the given
   * coin from the database while generating an insufficient funds
   * errors. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFRESH_MELT_HISTORY_DB_ERROR_INSUFFICIENT_FUNDS = 1308,

  /**
   * The denomination of the given coin has past its expiration date and
   * it is also not a valid zombie (that is, was not refreshed with the
   * fresh coin being subjected to payback).
   */
  TALER_EC_REFRESH_MELT_COIN_EXPIRED_NO_ZOMBIE = 1309,

  /**
   * The exchange is unaware of the denomination key that was used to
   * sign the melted zombie coin.  This response is provided with HTTP
   * status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_REFRESH_PAYBACK_DENOMINATION_KEY_NOT_FOUND = 1351,

  /**
   * Validity period of the denomination key is in the future.  Returned
   * with an HTTP status of #MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_REFRESH_PAYBACK_DENOMINATION_VALIDITY_IN_FUTURE = 1352,

  /**
   * Denomination key of the coin is past the deposit deadline.
   * Returned with an HTTP status of #MHD_HTTP_GONE.
   */
  TALER_EC_REFRESH_PAYBACK_DENOMINATION_EXPIRED = 1353,

  /**
   * Denomination key of the coin is past the deposit deadline.
   * Returned with an HTTP status of #MHD_HTTP_GONE.
   */
  TALER_EC_REFRESH_ZOMBIE_DENOMINATION_EXPIRED = 1354,

  /**
   * The provided transfer keys do not match up with the original
   * commitment.  Information about the original commitment is included
   * in the response.  This response is provided with HTTP status code
   * MHD_HTTP_CONFLICT.
   */
  TALER_EC_REFRESH_REVEAL_COMMITMENT_VIOLATION = 1370,

  /**
   * Failed to produce the blinded signatures over the coins to be
   * returned. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_SIGNING_ERROR = 1371,

  /**
   * The exchange is unaware of the refresh session specified in the
   * request. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_SESSION_UNKNOWN = 1372,

  /**
   * The exchange failed to retrieve valid session data from the
   * database. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_DB_FETCH_SESSION_ERROR = 1373,

  /**
   * The exchange failed to retrieve previously revealed data from the
   * database.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_DB_FETCH_REVEAL_ERROR = 1374,

  /**
   * The exchange failed to retrieve commitment data from the database.
   * This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_DB_COMMIT_ERROR = 1375,

  /**
   * The size of the cut-and-choose dimension of the private transfer
   * keys request does not match #TALER_CNC_KAPPA - 1. This response is
   * provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_CNC_TRANSFER_ARRAY_SIZE_INVALID = 1376,

  /**
   * The number of coins to be created in refresh exceeds the limits of
   * the exchange. private transfer keys request does not match
   * #TALER_CNC_KAPPA - 1. This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_NEW_DENOMS_ARRAY_SIZE_EXCESSIVE = 1377,

  /**
   * The number of envelopes given does not match the number of
   * denomination keys given. This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_NEW_DENOMS_ARRAY_SIZE_MISSMATCH = 1378,

  /**
   * The exchange encountered a numeric overflow totaling up the cost
   * for the refresh operation.  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_COST_CALCULATION_OVERFLOW = 1379,

  /**
   * The exchange's cost calculation shows that the melt amount is below
   * the costs of the transaction.  This response is provided with HTTP
   * status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_AMOUNT_INSUFFICIENT = 1380,

  /**
   * The exchange is unaware of the denomination key that was requested
   * for one of the fresh coins.  This response is provided with HTTP
   * status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_FRESH_DENOMINATION_KEY_NOT_FOUND = 1381,

  /**
   * The signature made with the coin over the link data is invalid.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFRESH_REVEAL_LINK_SIGNATURE_INVALID = 1382,

  /**
   * The exchange failed to generate the signature as it could not find
   * the signing key for the denomination. This response is provided
   * with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFRESH_REVEAL_KEYS_MISSING = 1383,

  /**
   * The coin specified in the link request is unknown to the exchange.
   * This response is provided with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_REFRESH_LINK_COIN_UNKNOWN = 1400,

  /**
   * The exchange knows literally nothing about the coin we were asked
   * to refund. But without a transaction history, we cannot issue a
   * refund.  This is kind-of OK, the owner should just refresh it
   * directly without executing the refund.  This response is provided
   * with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_REFUND_COIN_NOT_FOUND = 1500,

  /**
   * We could not process the refund request as the coin's transaction
   * history does not permit the requested refund at this time.  The
   * "history" in the response proves this.  This response is provided
   * with HTTP status code MHD_HTTP_CONFLICT.
   */
  TALER_EC_REFUND_CONFLICT = 1501,

  /**
   * The exchange knows about the coin we were asked to refund, but not
   * about the specific /deposit operation.  Hence, we cannot issue a
   * refund (as we do not know if this merchant public key is authorized
   * to do a refund).  This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_REFUND_DEPOSIT_NOT_FOUND = 1503,

  /**
   * The currency specified for the refund is different from the
   * currency of the coin.  This response is provided with HTTP status
   * code MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_REFUND_CURRENCY_MISSMATCH = 1504,

  /**
   * When we tried to check if we already paid out the coin, the
   * exchange's database suddenly disagreed with data it previously
   * provided (internal inconsistency). This response is provided with
   * HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFUND_DB_INCONSISTENT = 1505,

  /**
   * The exchange can no longer refund the customer/coin as the money
   * was already transferred (paid out) to the merchant. (It should be
   * past the refund deadline.) This response is provided with HTTP
   * status code MHD_HTTP_GONE.
   */
  TALER_EC_REFUND_MERCHANT_ALREADY_PAID = 1506,

  /**
   * The amount the exchange was asked to refund exceeds (with fees) the
   * total amount of the deposit (including fees). This response is
   * provided with HTTP status code MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_REFUND_INSUFFICIENT_FUNDS = 1507,

  /**
   * The exchange failed to recover information about the denomination
   * key of the refunded coin (even though it recognizes the key).
   * Hence it could not check the fee strucutre. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFUND_DENOMINATION_KEY_NOT_FOUND = 1508,

  /**
   * The refund fee specified for the request is lower than the refund
   * fee charged by the exchange for the given denomination key of the
   * refunded coin. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFUND_FEE_TOO_LOW = 1509,

  /**
   * The exchange failed to store the refund information to its
   * database. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFUND_STORE_DB_ERROR = 1510,

  /**
   * The refund fee is specified in a different currency than the refund
   * amount. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFUND_FEE_CURRENCY_MISSMATCH = 1511,

  /**
   * The refunded amount is smaller than the refund fee, which would
   * result in a negative refund. This response is provided with HTTP
   * status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFUND_FEE_ABOVE_AMOUNT = 1512,

  /**
   * The signature of the merchant is invalid. This response is provided
   * with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_REFUND_MERCHANT_SIGNATURE_INVALID = 1513,

  /**
   * Merchant backend failed to create the refund confirmation
   * signature. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_REFUND_MERCHANT_SIGNING_FAILED = 1514,

  /**
   * The wire format specified in the "sender_account_details" is not
   * understood or not supported by this exchange. Returned with an HTTP
   * status code of MHD_HTTP_NOT_FOUND. (As we did not find an
   * interpretation of the wire format.)
   */
  TALER_EC_ADMIN_ADD_INCOMING_WIREFORMAT_UNSUPPORTED = 1600,

  /**
   * The currency specified in the "amount" parameter is not supported
   * by this exhange.  Returned with an HTTP status code of
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_ADMIN_ADD_INCOMING_CURRENCY_UNSUPPORTED = 1601,

  /**
   * The exchange failed to store information about the incoming
   * transfer in its database.  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_ADMIN_ADD_INCOMING_DB_STORE = 1602,

  /**
   * The exchange encountered an error (that is not about not finding
   * the wire transfer) trying to lookup a wire transfer identifier in
   * the database.  This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_FETCH_FAILED = 1700,

  /**
   * The exchange found internally inconsistent data when resolving a
   * wire transfer identifier in the database.  This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_INCONSISTENT = 1701,

  /**
   * The exchange did not find information about the specified wire
   * transfer identifier in the database.  This response is provided
   * with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_TRACK_TRANSFER_WTID_NOT_FOUND = 1702,

  /**
   * The exchange did not find information about the wire transfer fees
   * it charged. This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_WIRE_FEE_NOT_FOUND = 1703,

  /**
   * The exchange found a wire fee that was above the total transfer
   * value (and thus could not have been charged). This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_WIRE_FEE_INCONSISTENT = 1704,

  /**
   * The exchange found internally inconsistent fee data when resolving
   * a transaction in the database.  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSACTION_DB_FEE_INCONSISTENT = 1800,

  /**
   * The exchange encountered an error (that is not about not finding
   * the transaction) trying to lookup a transaction in the database.
   * This response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSACTION_DB_FETCH_FAILED = 1801,

  /**
   * The exchange did not find information about the specified
   * transaction in the database.  This response is provided with HTTP
   * status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_TRACK_TRANSACTION_NOT_FOUND = 1802,

  /**
   * The exchange failed to identify the wire transfer of the
   * transaction (or information about the plan that it was supposed to
   * still happen in the future).  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSACTION_WTID_RESOLUTION_ERROR = 1803,

  /**
   * The signature of the merchant is invalid. This response is provided
   * with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_TRACK_TRANSACTION_MERCHANT_SIGNATURE_INVALID = 1804,

  /**
   * The given denomination key is not in the "payback" set of the
   * exchange right now.  This response is provided with an HTTP status
   * code of MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_PAYBACK_DENOMINATION_KEY_UNKNOWN = 1850,

  /**
   * The given coin signature is invalid for the request. This response
   * is provided with an HTTP status code of MHD_HTTP_FORBIDDEN.
   */
  TALER_EC_PAYBACK_SIGNATURE_INVALID = 1851,

  /**
   * The signature of the denomination key over the coin is not valid.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAYBACK_DENOMINATION_SIGNATURE_INVALID = 1852,

  /**
   * The exchange failed to access its own database about reserves. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAYBACK_DB_FETCH_FAILED = 1853,

  /**
   * The exchange could not find the corresponding withdraw operation.
   * The request is denied.  This response is provided with an HTTP
   * status code of MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_PAYBACK_WITHDRAW_NOT_FOUND = 1854,

  /**
   * The exchange obtained an internally inconsistent transaction
   * history for the given coin. This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAYBACK_HISTORY_DB_ERROR = 1855,

  /**
   * The exchange failed to store information about the payback to be
   * performed in the database. This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAYBACK_DB_PUT_FAILED = 1856,

  /**
   * The coin's remaining balance is zero.  The request is denied. This
   * response is provided with an HTTP status code of
   * MHD_HTTP_FORBIDDEN.
   */
  TALER_EC_PAYBACK_COIN_BALANCE_ZERO = 1857,

  /**
   * The exchange failed to reproduce the coin's blinding. This response
   * is provided with an HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAYBACK_BLINDING_FAILED = 1858,

  /**
   * The coin's remaining balance is zero.  The request is denied. This
   * response is provided with an HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR
   */
  TALER_EC_PAYBACK_COIN_BALANCE_NEGATIVE = 1859,

  /**
   * Validity period of the denomination key is in the future.  Returned
   * with an HTTP status of #MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_PAYBACK_DENOMINATION_VALIDITY_IN_FUTURE = 1860,

  /**
   * The "have" parameter was not a natural number. This reponse is
   * provied with an HTTP status code of MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_KEYS_HAVE_NOT_NUMERIC = 1900,

  /**
   * We currently cannot find any keys. This reponse is provied with an
   * HTTP status code of MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_KEYS_MISSING = 1901,

  /**
   * The backend could not find the merchant instance specified in the
   * request.   This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_INSTANCE_UNKNOWN = 2000,

  /**
   * The frontend specified two different instances within the same
   * order: one in the top level, and the other one within the
   * 'merchant' object. FIXME: hopefully this one is now obsolete?
   */
  TALER_EC_CONTRACT_INSTANCE_INCONSISTENT = 2001,

  /**
   * The backend lacks a wire transfer method configuration option for
   * the given instance.
   */
  TALER_EC_PROPOSAL_INSTANCE_CONFIGURATION_LACKS_WIRE = 2002,

  /**
   * The exchange failed to provide a meaningful response to a /deposit
   * request.  This response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_PAY_EXCHANGE_FAILED = 2101,

  /**
   * The merchant failed to commit the exchanges' response to a /deposit
   * request to its database.  This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_DB_STORE_PAY_ERROR = 2102,

  /**
   * The specified exchange is not supported/trusted by this merchant.
   * This response is provided with HTTP status code
   * MHD_HTTP_PRECONDITION_FAILED.
   */
  TALER_EC_PAY_EXCHANGE_REJECTED = 2103,

  /**
   * The denomination key used for payment is not listed among the
   * denomination keys of the exchange.  This response is provided with
   * HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_DENOMINATION_KEY_NOT_FOUND = 2104,

  /**
   * The denomination key used for payment is not audited by an auditor
   * approved by the merchant.  This response is provided with HTTP
   * status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_DENOMINATION_KEY_AUDITOR_FAILURE = 2105,

  /**
   * There was an integer overflow totaling up the amounts or deposit
   * fees in the payment.  This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_AMOUNT_OVERFLOW = 2106,

  /**
   * The deposit fees exceed the total value of the payment. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_FEES_EXCEED_PAYMENT = 2107,

  /**
   * After considering deposit fees, the payment is insufficient to
   * satisfy the required amount for the contract. This response is
   * provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_PAYMENT_INSUFFICIENT_DUE_TO_FEES = 2108,

  /**
   * While the merchant is happy to cover all applicable deposit fees,
   * the payment is insufficient to satisfy the required amount for the
   * contract.  This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_PAYMENT_INSUFFICIENT = 2109,

  /**
   * The signature over the contract of one of the coins was invalid.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_COIN_SIGNATURE_INVALID = 2110,

  /**
   * We failed to contact the exchange for the /pay request. This
   * response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_PAY_EXCHANGE_TIMEOUT = 2111,

  /**
   * The signature over the contract of the merchant was invalid. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_MERCHANT_SIGNATURE_INVALID = 2113,

  /**
   * The refund deadline was after the transfer deadline. This response
   * is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_REFUND_DEADLINE_PAST_WIRE_TRANSFER_DEADLINE = 2114,

  /**
   * The request fails to provide coins for the payment. This response
   * is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_COINS_ARRAY_EMPTY = 2115,

  /**
   * The merchant failed to fetch the merchant's previous state with
   * respect to a /pay request from its database.  This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_DB_FETCH_PAY_ERROR = 2116,

  /**
   * The merchant failed to fetch the merchant's previous state with
   * respect to transactions from its database.  This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_DB_FETCH_TRANSACTION_ERROR = 2117,

  /**
   * The transaction ID was used for a conflicing transaction before.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_DB_TRANSACTION_ID_CONFLICT = 2118,

  /**
   * The merchant failed to store the merchant's state with respect to
   * the transaction in its database.  This response is provided with
   * HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_DB_STORE_TRANSACTION_ERROR = 2119,

  /**
   * The exchange failed to provide a valid response to the merchant's
   * /keys request. This response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_PAY_EXCHANGE_KEYS_FAILURE = 2120,

  /**
   * The payment is too late, the offer has expired. This response is
   * provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_OFFER_EXPIRED = 2121,

  /**
   * The "merchant" field is missing in the proposal data. This response
   * is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_PAY_MERCHANT_FIELD_MISSING = 2122,

  /**
   * Failed computing a hash code (likely server out-of-memory). This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_FAILED_COMPUTE_PROPOSAL_HASH = 2123,

  /**
   * Failed to locate merchant's account information matching the wire
   * hash given in the proposal. This response is provided with HTTP
   * status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_WIRE_HASH_UNKNOWN = 2124,

  /**
   * We got different currencies for the wire fee and the maximum wire
   * fee.  This response is provided with HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PAY_WIRE_FEE_CURRENCY_MISSMATCH = 2125,

  /**
   * The merchant refuses to abort and refund the payment operation as
   * the payment succeeded already. This response is provided with HTTP
   * status code of MHD_HTTP_FORBIDDEN.
   */
  TALER_EC_PAY_ABORT_REFUND_REFUSED_PAYMENT_COMPLETE = 2126,

  /**
   * A unknown merchant public key was included in the payment.  That
   * happens typically when the wallet sends the payment to the wrong
   * merchant instance.
   */
  TALER_EC_PAY_WRONG_INSTANCE = 2127,

  /**
   * Integer overflow with sepcified timestamp argument detected. This
   * response is provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_HISTORY_TIMESTAMP_OVERFLOW = 2200,

  /**
   * Failed to retrieve history from merchant database. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_HISTORY_DB_FETCH_ERROR = 2201,

  /**
   * The backend could not find the contract specified in the request.
   * This response is provided with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_POLL_PAYMENT_CONTRACT_NOT_FOUND = 2250,

  /**
   * We failed to contact the exchange for the /track/transaction
   * request.  This response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_TRACK_TRANSACTION_EXCHANGE_TIMEOUT = 2300,

  /**
   * The backend could not find the transaction specified in the
   * request.   This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_TRACK_TRANSACTION_TRANSACTION_UNKNOWN = 2302,

  /**
   * The backend had a database access error trying to retrieve
   * transaction data from its database. The response is provided with
   * HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSACTION_DB_FETCH_TRANSACTION_ERROR = 2303,

  /**
   * The backend had a database access error trying to retrieve payment
   * data from its database. The response is provided with HTTP status
   * code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSACTION_DB_FETCH_PAYMENT_ERROR = 2304,

  /**
   * The backend found no applicable deposits in the database. This is
   * odd, as we know about the transaction, but not about deposits we
   * made for the transaction.  The response is provided with HTTP
   * status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_TRACK_TRANSACTION_DB_NO_DEPOSITS_ERROR = 2305,

  /**
   * We failed to obtain a wire transfer identifier for one of the coins
   * in the transaction.  The response is provided with HTTP status code
   * MHD_HTTP_FAILED_DEPENDENCY if the exchange had a hard error, or
   * MHD_HTTP_ACCEPTED if the exchange signaled that the transfer was in
   * progress.
   */
  TALER_EC_TRACK_TRANSACTION_COIN_TRACE_ERROR = 2306,

  /**
   * We failed to obtain the full wire transfer identifier for the
   * transfer one of the coins was aggregated into. The response is
   * provided with HTTP status code MHD_HTTP_FAILED_DEPENDENCY.
   */
  TALER_EC_TRACK_TRANSACTION_WIRE_TRANSFER_TRACE_ERROR = 2307,

  /**
   * We got conflicting reports from the exhange with respect to which
   * transfers are included in which aggregate. The response is provided
   * with HTTP status code MHD_HTTP_FAILED_DEPENDENCY.
   */
  TALER_EC_TRACK_TRANSACTION_CONFLICTING_REPORTS = 2308,

  /**
   * We failed to contact the exchange for the /track/transfer request.
   * This response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_TRACK_TRANSFER_EXCHANGE_TIMEOUT = 2400,

  /**
   * We failed to persist coin wire transfer information in our merchant
   * database. The response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_STORE_COIN_ERROR = 2402,

  /**
   * We internally failed to execute the /track/transfer request. The
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_REQUEST_ERROR = 2403,

  /**
   * We failed to persist wire transfer information in our merchant
   * database. The response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_STORE_TRANSFER_ERROR = 2404,

  /**
   * The exchange returned an error from /track/transfer. The response
   * is provided with HTTP status code MHD_HTTP_FAILED_DEPENDENCY.
   */
  TALER_EC_TRACK_TRANSFER_EXCHANGE_ERROR = 2405,

  /**
   * We failed to fetch deposit information from our merchant database.
   * The response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_FETCH_DEPOSIT_ERROR = 2406,

  /**
   * We encountered an internal logic error. The response is provided
   * with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TRACK_TRANSFER_DB_INTERNAL_LOGIC_ERROR = 2407,

  /**
   * The exchange gave conflicting information about a coin which has
   * been wire transferred. The response is provided with HTTP status
   * code MHD_HTTP_INTERNAL_SERVER_ERROR (FIXME: bad choice!).
   */
  TALER_EC_TRACK_TRANSFER_CONFLICTING_REPORTS = 2408,

  /**
   * The merchant backend had problems in creating the JSON response.
   */
  TALER_EC_TRACK_TRANSFER_JSON_RESPONSE_ERROR = 2409,

  /**
   * The exchange charged a different wire fee than what it originally
   * advertised, and it is higher.  The response is provied with an HTTP
   * status of MHD_HTTP_INTERNAL_SERVER_ERROR (FIXME: bad choice!).
   */
  TALER_EC_TRACK_TRANSFER_JSON_BAD_WIRE_FEE = 2410,

  /**
   * The hash provided in the request of /map/in does not match the
   * contract sent alongside in the same request.
   */
  TALER_EC_MAP_IN_UNMATCHED_HASH = 2500,

  /**
   * The backend encountered an error while trying to store the
   * h_contract_terms into the database. The response is provided with
   * HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PROPOSAL_STORE_DB_ERROR = 2501,

  /**
   * The backend encountered an error while trying to retrieve the
   * proposal data from database.  Likely to be an internal error.
   */
  TALER_EC_PROPOSAL_LOOKUP_DB_ERROR = 2502,

  /**
   * The proposal being looked up is not found on this merchant.
   */
  TALER_EC_PROPOSAL_LOOKUP_NOT_FOUND = 2503,

  /**
   * The proposal had no timestamp and the backend failed to obtain the
   * local time. Likely to be an internal error.
   */
  TALER_EC_PROPOSAL_NO_LOCALTIME = 2504,

  /**
   * The order provided to the backend could not be parsed, some
   * required fields were missing or ill-formed. Returned as a bad
   * request.
   */
  TALER_EC_PROPOSAL_ORDER_PARSE_ERROR = 2505,

  /**
   * The backend encountered an error while trying to find the existing
   * proposal in the database. The response is provided with HTTP status
   * code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PROPOSAL_STORE_DB_ERROR_HARD = 2506,

  /**
   * The backend encountered an error while trying to find the existing
   * proposal in the database. The response is provided with HTTP status
   * code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PROPOSAL_STORE_DB_ERROR_SOFT = 2507,

  /**
   * The backend encountered an error: the proposal already exists. The
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_PROPOSAL_STORE_DB_ERROR_ALREADY_EXISTS = 2508,

  /**
   * The order provided to the backend uses an amount in a currency that
   * does not match the backend's configuration. Returned as a bad
   * request.
   */
  TALER_EC_PROPOSAL_ORDER_BAD_CURRENCY = 2509,

  /**
   * The frontend gave an unknown order id to issue the refund to.
   */
  TALER_EC_REFUND_ORDER_ID_UNKNOWN = 2601,

  /**
   * The amount to be refunded is inconsistent: either is lower than the
   * previous amount being awarded, or it is too big to be paid back. In
   * this second case, the fault stays on the business dept. side.
   * Returned with an HTTP status of #MHD_HTTP_CONFLICT.
   */
  TALER_EC_REFUND_INCONSISTENT_AMOUNT = 2602,

  /**
   * The backend encountered an error while trying to retrieve the
   * payment data from database.  Likely to be an internal error.
   */
  TALER_EC_REFUND_LOOKUP_DB_ERROR = 2603,

  /**
   * The backend encountered an error while trying to retrieve the
   * payment data from database.  Likely to be an internal error.
   */
  TALER_EC_REFUND_MERCHANT_DB_COMMIT_ERROR = 2604,

  /**
   * Payments are stored in a single db transaction; this error
   * indicates that one db operation within that transaction failed.
   * This might involve storing of coins or other related db operations,
   * like starting/committing the db transaction or marking a contract
   * as paid.
   */
  TALER_EC_PAY_DB_STORE_PAYMENTS_ERROR = 2605,

  /**
   * The backend failed to sign the refund request.
   */
  TALER_EC_PAY_REFUND_SIGNATURE_FAILED = 2606,

  /**
   * The backend knows the instance that was supposed to support the
   * tip, but it was not configured for tipping (i.e. has no exchange
   * associated with it).  Likely to be a configuration error. Returned
   * with an HTTP status code of "NOT FOUND".
   */
  TALER_EC_TIP_AUTHORIZE_INSTANCE_DOES_NOT_TIP = 2701,

  /**
   * The reserve that was used to fund the tips has expired. Returned
   * with an HTTP status code of "not found".
   */
  TALER_EC_TIP_AUTHORIZE_RESERVE_EXPIRED = 2702,

  /**
   * The reserve that was used to fund the tips was not found in the DB.
   * Returned with an HTTP status code of "not found".
   */
  TALER_EC_TIP_AUTHORIZE_RESERVE_UNKNOWN = 2703,

  /**
   * The backend knows the instance that was supposed to support the
   * tip, and it was configured for tipping. However, the funds
   * remaining are insufficient to cover the tip, and the merchant
   * should top up the reserve. Returned with an HTTP status code of
   * "PRECONDITION FAILED".
   */
  TALER_EC_TIP_AUTHORIZE_INSUFFICIENT_FUNDS = 2704,

  /**
   * The backend had trouble accessing the database to persist
   * information about the tip authorization. Returned with an HTTP
   * status code of internal error.
   */
  TALER_EC_TIP_AUTHORIZE_DB_HARD_ERROR = 2705,

  /**
   * The backend had trouble accessing the database to persist
   * information about the tip authorization. The problem might be
   * fixable by repeating the transaction.
   */
  TALER_EC_TIP_AUTHORIZE_DB_SOFT_ERROR = 2706,

  /**
   * The backend failed to obtain a reserve status from the exchange.
   */
  TALER_EC_TIP_QUERY_RESERVE_STATUS_FAILED_EXCHANGE_DOWN = 2707,

  /**
   * The backend got an empty (!) reserve history from the exchange.
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_FAILED_EMPTY = 2708,

  /**
   * The backend got an invalid reserve history (fails to start with a
   * deposit) from the exchange.
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_INVALID_NO_DEPOSIT = 2709,

  /**
   * The backend got an reserve history with a bad currency from the
   * exchange.
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_INVALID_CURRENCY = 2710,

  /**
   * The backend got a reserve with a currency that does not match the
   * backend's currency.
   */
  TALER_EC_TIP_QUERY_RESERVE_CURRENCY_MISSMATCH = 2711,

  /**
   * The backend got a reserve history with amounts it cannot process
   * (addition failure in deposits).
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_ARITHMETIC_ISSUE_DEPOSIT = 2712,

  /**
   * The backend got a reserve history with amounts it cannot process
   * (addition failure in withdraw amounts).
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_ARITHMETIC_ISSUE_WITHDRAW = 2713,

  /**
   * The backend got a reserve history with amounts it cannot process
   * (addition failure in closing amounts).
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_ARITHMETIC_ISSUE_CLOSED = 2714,

  /**
   * The backend got a reserve history with inconsistent amounts.
   */
  TALER_EC_TIP_QUERY_RESERVE_HISTORY_ARITHMETIC_ISSUE_INCONSISTENT = 2715,

  /**
   * The backend encountered a database error querying tipping reserves.
   */
  TALER_EC_TIP_QUERY_DB_ERROR = 2716,

  /**
   * The backend had trouble accessing the database to persist
   * information about enabling tips. Returned with an HTTP status code
   * of internal error.
   */
  TALER_EC_TIP_ENABLE_DB_TRANSACTION_ERROR = 2750,

  /**
   * The tip ID is unknown.  This could happen if the tip has expired.
   * Returned with an HTTP status code of "not found".
   */
  TALER_EC_TIP_PICKUP_TIP_ID_UNKNOWN = 2800,

  /**
   * The amount requested exceeds the remaining tipping balance for this
   * tip ID. Returned with an HTTP status code of "Conflict" (as it
   * conflicts with a previous pickup operation).
   */
  TALER_EC_TIP_PICKUP_NO_FUNDS = 2801,

  /**
   * We encountered a DB error, repeating the request may work.
   */
  TALER_EC_TIP_PICKUP_DB_ERROR_SOFT = 2802,

  /**
   * We encountered a DB error, repeating the request will not help.
   * This is an internal server error.
   */
  TALER_EC_TIP_PICKUP_DB_ERROR_HARD = 2803,

  /**
   * The same pickup ID was already used for picking up a different
   * amount. This points to a very strange internal error as the pickup
   * ID is derived from the denomination key which is tied to a
   * particular amount. Hence this should also be an internal server
   * error.
   */
  TALER_EC_TIP_PICKUP_AMOUNT_CHANGED = 2804,

  /**
   * We failed to contact the exchange to obtain the denomination keys.
   * Returned with a response code "failed dependency" (424).
   */
  TALER_EC_TIP_PICKUP_EXCHANGE_DOWN = 2805,

  /**
   * We contacted the exchange to obtain any denomination keys, but got
   * no valid keys. Returned with a response code "failed dependency"
   * (424).
   */
  TALER_EC_TIP_PICKUP_EXCHANGE_LACKED_KEYS = 2806,

  /**
   * We contacted the exchange to obtain at least one of the
   * denomination keys specified in the request. Returned with a
   * response code "not found" (404).
   */
  TALER_EC_TIP_PICKUP_EXCHANGE_LACKED_KEY = 2807,

  /**
   * We encountered an arithmetic issue totaling up the amount to
   * withdraw. Returned with a response code of "bad request".
   */
  TALER_EC_TIP_PICKUP_EXCHANGE_AMOUNT_OVERFLOW = 2808,

  /**
   * The number of planchets specified exceeded the limit. Returned with
   * a response code of "bad request".
   */
  TALER_EC_TIP_PICKUP_EXCHANGE_TOO_MANY_PLANCHETS = 2809,

  /**
   * The tip id is unknown.  This could happen if the tip id is wrong or
   * the tip authorization expired.
   */
  TALER_EC_TIP_QUERY_TIP_ID_UNKNOWN = 2810,

  /**
   * We failed to contract terms from our merchant database. The
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_CHECK_PAYMENT_DB_FETCH_CONTRACT_TERMS_ERROR = 2911,

  /**
   * We failed to contract terms from our merchant database. The
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_CHECK_PAYMENT_DB_FETCH_ORDER_ERROR = 2912,

  /**
   * The order id we're checking is unknown, likely the frontend did not
   * create the order first.
   */
  TALER_EC_CHECK_PAYMENT_ORDER_ID_UNKNOWN = 2913,

  /**
   * Failed computing a hash code (likely server out-of-memory). This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_CHECK_PAYMENT_FAILED_COMPUTE_PROPOSAL_HASH = 2914,

  /**
   * Signature "session_sig" failed to verify. This response is provided
   * with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_CHECK_PAYMENT_SESSION_SIGNATURE_INVALID = 2915,

  /**
   * The signature from the exchange on the deposit confirmation is
   * invalid.  Returned with a "400 Bad Request" status code.
   */
  TALER_EC_DEPOSIT_CONFIRMATION_SIGNATURE_INVALID = 3000,

  /**
   * The auditor had trouble storing the deposit confirmation in its
   * database. Returned with an HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_DEPOSIT_CONFIRMATION_STORE_DB_ERROR = 3001,

  /**
   * The auditor had trouble retrieving the exchange list from its
   * database. Returned with an HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_LIST_EXCHANGES_DB_ERROR = 3002,

  /**
   * The auditor had trouble storing an exchange in its database.
   * Returned with an HTTP status code of
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_AUDITOR_EXCHANGE_STORE_DB_ERROR = 3003,

  /**
   * The exchange failed to compute ECDH.  This response is provided
   * with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TEST_ECDH_ERROR = 4000,

  /**
   * The EdDSA test signature is invalid.  This response is provided
   * with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_TEST_EDDSA_INVALID = 4001,

  /**
   * The exchange failed to compute the EdDSA test signature.  This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TEST_EDDSA_ERROR = 4002,

  /**
   * The exchange failed to generate an RSA key.  This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TEST_RSA_GEN_ERROR = 4003,

  /**
   * The exchange failed to compute the public RSA key.  This response
   * is provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TEST_RSA_PUB_ERROR = 4004,

  /**
   * The exchange failed to compute the RSA signature.  This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_TEST_RSA_SIGN_ERROR = 4005,

  /**
   * The JSON in the server's response was malformed.  This response is
   * provided with HTTP status code of 0.
   */
  TALER_EC_SERVER_JSON_INVALID = 5000,

  /**
   * A signature in the server's response was malformed.  This response
   * is provided with HTTP status code of 0.
   */
  TALER_EC_SERVER_SIGNATURE_INVALID = 5001,

  /**
   * Wire tranfer attempted with credit and debit party being the same
   * bank account.
   */
  TALER_EC_BANK_SAME_ACCOUNT = 5102,

  /**
   * Wire transfer impossible, due to financial limitation of the party
   * that attempted the payment.
   */
  TALER_EC_BANK_UNALLOWED_DEBIT = 5103,

  /**
   * Arithmetic operation between two amounts of different currency was
   * attempted.
   */
  TALER_EC_BANK_CURRENCY_MISMATCH = 5104,

  /**
   * At least one GET parameter was either missing or invalid for the
   * requested operation.
   */
  TALER_EC_BANK_PARAMETER_MISSING_OR_INVALID = 5105,

  /**
   * JSON body sent was invalid for the requested operation.
   */
  TALER_EC_BANK_JSON_INVALID = 5106,

  /**
   * Negative number was used (as value and/or fraction) to initiate a
   * Amount object.
   */
  TALER_EC_BANK_NEGATIVE_NUMBER_AMOUNT = 5107,

  /**
   * A number too big was used (as value and/or fraction) to initiate a
   * amount object.
   */
  TALER_EC_BANK_NUMBER_TOO_BIG = 5108,

  /**
   * Could not login for the requested operation.
   */
  TALER_EC_BANK_LOGIN_FAILED = 5109,

  /**
   * The bank account referenced in the requested operation was not
   * found.  Returned along "400 Not found".
   */
  TALER_EC_BANK_UNKNOWN_ACCOUNT = 5110,

  /**
   * The transaction referenced in the requested operation (typically a
   * reject operation), was not found.
   */
  TALER_EC_BANK_TRANSACTION_NOT_FOUND = 5111,

  /**
   * Bank received a malformed amount string.
   */
  TALER_EC_BANK_BAD_FORMAT_AMOUNT = 5112,

  /**
   * The client does not own the account credited by the transaction
   * which is to be rejected, so it has no rights do reject it.  To be
   * returned along HTTP 403 Forbidden.
   */
  TALER_EC_BANK_REJECT_NO_RIGHTS = 5200,

  /**
   * This error code is returned when no known exception types captured
   * the exception, and comes along with a 500 Internal Server Error.
   */
  TALER_EC_BANK_UNMANAGED_EXCEPTION = 5300,

  /**
   * This error code is used for all those exceptions that do not really
   * need a specific error code to return to the client, but need to
   * signal the middleware that the bank is not responding with 500
   * Internal Server Error.  Used for example when a client is trying to
   * register with a unavailable username.
   */
  TALER_EC_BANK_SOFT_EXCEPTION = 5400,

  /**
   * The sync service failed to access its database. This response is
   * provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_DB_FETCH_ERROR = 6000,

  /**
   * The sync service failed find the record in its database. This
   * response is provided with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_SYNC_BACKUP_UNKNOWN = 6001,

  /**
   * The sync service failed find the account in its database. This
   * response is provided with HTTP status code MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_SYNC_ACCOUNT_UNKNOWN = 6002,

  /**
   * The SHA-512 hash provided in the If-None-Match header is malformed.
   * This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_SYNC_BAD_IF_NONE_MATCH = 6003,

  /**
   * The SHA-512 hash provided in the If-Match header is malformed or
   * missing. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_SYNC_BAD_IF_MATCH = 6004,

  /**
   * The signature provided in the "Sync-Signature" header is malformed
   * or missing. This response is provided with HTTP status code
   * MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_SYNC_BAD_SYNC_SIGNATURE = 6005,

  /**
   * The signature provided in the "Sync-Signature" header does not
   * match the account, old or new Etags. This response is provided with
   * HTTP status code MHD_HTTP_FORBIDDEN.
   */
  TALER_EC_SYNC_INVALID_SIGNATURE = 6007,

  /**
   * The "Content-length" field for the upload is either not a number,
   * or too big, or missing. This response is provided with HTTP status
   * code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_SYNC_BAD_CONTENT_LENGTH = 6008,

  /**
   * The "Content-length" field for the upload is too big based on the
   * server's terms of service. This response is provided with HTTP
   * status code MHD_HTTP_PAYLOAD_TOO_LARGE.
   */
  TALER_EC_SYNC_EXCESSIVE_CONTENT_LENGTH = 6009,

  /**
   * The server is out of memory to handle the upload. Trying again
   * later may succeed. This response is provided with HTTP status code
   * MHD_HTTP_PAYLOAD_TOO_LARGE.
   */
  TALER_EC_SYNC_OUT_OF_MEMORY_ON_CONTENT_LENGTH = 6010,

  /**
   * The uploaded data does not match the Etag. This response is
   * provided with HTTP status code MHD_HTTP_BAD_REQUEST.
   */
  TALER_EC_SYNC_INVALID_UPLOAD = 6011,

  /**
   * We failed to check for existing upload data in the database. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_DATABASE_FETCH_ERROR = 6012,

  /**
   * HTTP server was being shutdown while this operation was pending.
   * This response is provided with HTTP status code
   * MHD_HTTP_SERVICE_UNAVAILABLE.
   */
  TALER_EC_SYNC_SHUTDOWN = 6013,

  /**
   * HTTP server experienced a timeout while awaiting promised payment.
   * This response is provided with HTTP status code
   * MHD_HTTP_REQUEST_TIMEOUT.
   */
  TALER_EC_SYNC_PAYMENT_TIMEOUT = 6014,

  /**
   * Sync could not store order data in its own database. This response
   * is provided with HTTP status code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_PAYMENT_CREATE_DB_ERROR = 6015,

  /**
   * Sync could not store payment confirmation in its own database. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_PAYMENT_CONFIRM_DB_ERROR = 6016,

  /**
   * Sync could not fetch information about possible existing orders
   * from its own database. This response is provided with HTTP status
   * code MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_PAYMENT_CHECK_ORDER_DB_ERROR = 6017,

  /**
   * Sync could not setup the payment request with its own backend. This
   * response is provided with HTTP status code
   * MHD_HTTP_INTERNAL_SERVER_ERROR.
   */
  TALER_EC_SYNC_PAYMENT_CREATE_BACKEND_ERROR = 6018,

  /**
   * The sync service failed find the backup to be updated in its
   * database. This response is provided with HTTP status code
   * MHD_HTTP_NOT_FOUND.
   */
  TALER_EC_SYNC_PREVIOUS_BACKUP_UNKNOWN = 6019,

  /**
   * End of error code range.
   */
  TALER_EC_END = 9999,

};


#endif