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
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
|
/*
This file is part of TALER
Copyright (C) 2016-2020 Taler Systems SA
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU Affero Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU Affero Public License for more details.
You should have received a copy of the GNU Affero Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* @file auditor/taler-helper-auditor0coins.c
* @brief audits coins in an exchange database.
* @author Christian Grothoff
*
* UNDECIDED:
* - do we care about checking the 'done' flag in deposit_cb?
*/
#include "platform.h"
#include <gnunet/gnunet_util_lib.h>
#include "taler_auditordb_plugin.h"
#include "taler_exchangedb_lib.h"
#include "taler_json_lib.h"
#include "taler_bank_service.h"
#include "taler_signatures.h"
#include "report-lib.h"
/**
* How many coin histories do we keep in RAM at any given point in
* time? Used bound memory consumption of the auditor. Larger values
* reduce database accesses.
*
* Set to a VERY low value here for testing. Practical values may be
* in the millions.
*/
#define MAX_COIN_SUMMARIES 4
/**
* Use a 1 day grace period to deal with clocks not being perfectly synchronized.
*/
#define DEPOSIT_GRACE_PERIOD GNUNET_TIME_UNIT_DAYS
/**
* Return value from main().
*/
static int global_ret;
/**
* Checkpointing our progress for coins.
*/
static struct TALER_AUDITORDB_ProgressPointCoin ppc;
/**
* Checkpointing our progress for coins.
*/
static struct TALER_AUDITORDB_ProgressPointCoin ppc_start;
/**
* Array of TALER_ARL_reports about denomination keys with an
* emergency (more value deposited than withdrawn)
*/
static json_t *report_emergencies;
/**
* Array of TALER_ARL_reports about denomination keys with an
* emergency (more coins deposited than withdrawn)
*/
static json_t *report_emergencies_by_count;
/**
* Array of TALER_ARL_reports about row inconsitencies.
*/
static json_t *report_row_inconsistencies;
/**
* Report about amount calculation differences (causing profit
* or loss at the exchange).
*/
static json_t *report_amount_arithmetic_inconsistencies;
/**
* Profits the exchange made by bad amount calculations.
*/
static struct TALER_Amount total_arithmetic_delta_plus;
/**
* Losses the exchange made by bad amount calculations.
*/
static struct TALER_Amount total_arithmetic_delta_minus;
/**
* Total amount reported in all calls to #report_emergency_by_count().
*/
static struct TALER_Amount reported_emergency_risk_by_count;
/**
* Total amount reported in all calls to #report_emergency_by_amount().
*/
static struct TALER_Amount reported_emergency_risk_by_amount;
/**
* Total amount in losses reported in all calls to #report_emergency_by_amount().
*/
static struct TALER_Amount reported_emergency_loss;
/**
* Total amount in losses reported in all calls to #report_emergency_by_count().
*/
static struct TALER_Amount reported_emergency_loss_by_count;
/**
* Expected balance in the escrow account.
*/
static struct TALER_Amount total_escrow_balance;
/**
* Active risk exposure.
*/
static struct TALER_Amount total_risk;
/**
* Actualized risk (= loss) from recoups.
*/
static struct TALER_Amount total_recoup_loss;
/**
* Recoups we made on denominations that were not revoked (!?).
*/
static struct TALER_Amount total_irregular_recoups;
/**
* Total deposit fees earned.
*/
static struct TALER_Amount total_deposit_fee_income;
/**
* Total melt fees earned.
*/
static struct TALER_Amount total_melt_fee_income;
/**
* Total refund fees earned.
*/
static struct TALER_Amount total_refund_fee_income;
/**
* Array of TALER_ARL_reports about coin operations with bad signatures.
*/
static json_t *report_bad_sig_losses;
/**
* Total amount lost by operations for which signatures were invalid.
*/
static struct TALER_Amount total_bad_sig_loss;
/**
* Array of refresh transactions where the /refresh/reveal has not yet
* happened (and may of course never happen).
*/
static json_t *report_refreshs_hanging;
/**
* Total amount lost by operations for which signatures were invalid.
*/
static struct TALER_Amount total_refresh_hanging;
/* ***************************** Report logic **************************** */
/**
* Called in case we detect an emergency situation where the exchange
* is paying out a larger amount on a denomination than we issued in
* that denomination. This means that the exchange's private keys
* might have gotten compromised, and that we need to trigger an
* emergency request to all wallets to deposit pending coins for the
* denomination (and as an exchange suffer a huge financial loss).
*
* @param issue denomination key where the loss was detected
* @param risk maximum risk that might have just become real (coins created by this @a issue)
* @param loss actual losses already (actualized before denomination was revoked)
*/
static void
report_emergency_by_amount (
const struct TALER_DenominationKeyValidityPS *issue,
const struct TALER_Amount *risk,
const struct TALER_Amount *loss)
{
TALER_ARL_report (report_emergencies,
json_pack ("{s:o, s:o, s:o, s:o, s:o, s:o}",
"denompub_hash",
GNUNET_JSON_from_data_auto (&issue->denom_hash),
"denom_risk",
TALER_JSON_from_amount (risk),
"denom_loss",
TALER_JSON_from_amount (loss),
"start",
TALER_ARL_json_from_time_abs_nbo (
issue->start),
"deposit_end",
TALER_ARL_json_from_time_abs_nbo (
issue->expire_deposit),
"value",
TALER_JSON_from_amount_nbo (&issue->value)));
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&reported_emergency_risk_by_amount,
&reported_emergency_risk_by_amount,
risk));
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&reported_emergency_loss,
&reported_emergency_loss,
loss));
}
/**
* Called in case we detect an emergency situation where the exchange
* is paying out a larger NUMBER of coins of a denomination than we
* issued in that denomination. This means that the exchange's
* private keys might have gotten compromised, and that we need to
* trigger an emergency request to all wallets to deposit pending
* coins for the denomination (and as an exchange suffer a huge
* financial loss).
*
* @param issue denomination key where the loss was detected
* @param num_issued number of coins that were issued
* @param num_known number of coins that have been deposited
* @param risk amount that is at risk
*/
static void
report_emergency_by_count (
const struct TALER_DenominationKeyValidityPS *issue,
uint64_t num_issued,
uint64_t num_known,
const struct TALER_Amount *risk)
{
struct TALER_Amount denom_value;
TALER_ARL_report (report_emergencies_by_count,
json_pack ("{s:o, s:I, s:I, s:o, s:o, s:o, s:o}",
"denompub_hash",
GNUNET_JSON_from_data_auto (&issue->denom_hash),
"num_issued",
(json_int_t) num_issued,
"num_known",
(json_int_t) num_known,
"denom_risk",
TALER_JSON_from_amount (risk),
"start",
TALER_ARL_json_from_time_abs_nbo (
issue->start),
"deposit_end",
TALER_ARL_json_from_time_abs_nbo (
issue->expire_deposit),
"value",
TALER_JSON_from_amount_nbo (&issue->value)));
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&reported_emergency_risk_by_count,
&reported_emergency_risk_by_count,
risk));
TALER_amount_ntoh (&denom_value,
&issue->value);
for (uint64_t i = num_issued; i<num_known; i++)
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (
&reported_emergency_loss_by_count,
&reported_emergency_loss_by_count,
&denom_value));
}
/**
* Report a (serious) inconsistency in the exchange's database with
* respect to calculations involving amounts.
*
* @param operation what operation had the inconsistency
* @param rowid affected row, UINT64_MAX if row is missing
* @param exchange amount calculated by exchange
* @param auditor amount calculated by auditor
* @param profitable 1 if @a exchange being larger than @a auditor is
* profitable for the exchange for this operation,
* -1 if @a exchange being smaller than @a auditor is
* profitable for the exchange, and 0 if it is unclear
*/
static void
report_amount_arithmetic_inconsistency (
const char *operation,
uint64_t rowid,
const struct TALER_Amount *exchange,
const struct TALER_Amount *auditor,
int profitable)
{
struct TALER_Amount delta;
struct TALER_Amount *target;
if (0 < TALER_amount_cmp (exchange,
auditor))
{
/* exchange > auditor */
GNUNET_break (GNUNET_OK ==
TALER_amount_subtract (&delta,
exchange,
auditor));
}
else
{
/* auditor < exchange */
profitable = -profitable;
GNUNET_break (GNUNET_OK ==
TALER_amount_subtract (&delta,
auditor,
exchange));
}
TALER_ARL_report (report_amount_arithmetic_inconsistencies,
json_pack ("{s:s, s:I, s:o, s:o, s:I}",
"operation", operation,
"rowid", (json_int_t) rowid,
"exchange", TALER_JSON_from_amount (exchange),
"auditor", TALER_JSON_from_amount (auditor),
"profitable", (json_int_t) profitable));
if (0 != profitable)
{
target = (1 == profitable)
? &total_arithmetic_delta_plus
: &total_arithmetic_delta_minus;
GNUNET_break (GNUNET_OK ==
TALER_amount_add (target,
target,
&delta));
}
}
/**
* Report a (serious) inconsistency in the exchange's database.
*
* @param table affected table
* @param rowid affected row, UINT64_MAX if row is missing
* @param diagnostic message explaining the problem
*/
static void
report_row_inconsistency (const char *table,
uint64_t rowid,
const char *diagnostic)
{
TALER_ARL_report (report_row_inconsistencies,
json_pack ("{s:s, s:I, s:s}",
"table", table,
"row", (json_int_t) rowid,
"diagnostic", diagnostic));
}
/* ************************* Analyze coins ******************** */
/* This logic checks that the exchange did the right thing for each
coin, checking deposits, refunds, refresh* and known_coins
tables */
/**
* Summary data we keep per denomination.
*/
struct DenominationSummary
{
/**
* Total value of outstanding (not deposited) coins issued with this
* denomination key.
*/
struct TALER_Amount denom_balance;
/**
* Total losses made (once coins deposited exceed
* coins withdrawn and thus the @e denom_balance is
* effectively negative).
*/
struct TALER_Amount denom_loss;
/**
* Total value of coins issued with this denomination key.
*/
struct TALER_Amount denom_risk;
/**
* Total value of coins subjected to recoup with this denomination key.
*/
struct TALER_Amount denom_recoup;
/**
* How many coins (not their amount!) of this denomination
* did the exchange issue overall?
*/
uint64_t num_issued;
/**
* Denomination key information for this denomination.
*/
const struct TALER_DenominationKeyValidityPS *issue;
/**
* #GNUNET_YES if this record already existed in the DB.
* Used to decide between insert/update in
* #sync_denomination().
*/
int in_db;
/**
* Should we TALER_ARL_report an emergency for this denomination?
*/
int report_emergency;
/**
* #GNUNET_YES if this denomination was revoked.
*/
int was_revoked;
};
/**
* Closure for callbacks during #analyze_coins().
*/
struct CoinContext
{
/**
* Map for tracking information about denominations.
*/
struct GNUNET_CONTAINER_MultiHashMap *denom_summaries;
/**
* Current write/replace offset in the circular @e summaries buffer.
*/
unsigned int summaries_off;
/**
* Transaction status code.
*/
enum GNUNET_DB_QueryStatus qs;
};
/**
* Initialize information about denomination from the database.
*
* @param denom_hash hash of the public key of the denomination
* @param[out] ds summary to initialize
* @return transaction status code
*/
static enum GNUNET_DB_QueryStatus
init_denomination (const struct GNUNET_HashCode *denom_hash,
struct DenominationSummary *ds)
{
enum GNUNET_DB_QueryStatus qs;
struct TALER_MasterSignatureP msig;
uint64_t rowid;
qs = TALER_ARL_adb->get_denomination_balance (TALER_ARL_adb->cls,
TALER_ARL_asession,
denom_hash,
&ds->denom_balance,
&ds->denom_loss,
&ds->denom_risk,
&ds->denom_recoup,
&ds->num_issued);
if (0 > qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs)
{
ds->in_db = GNUNET_YES;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting balance for denomination `%s' is %s\n",
GNUNET_h2s (denom_hash),
TALER_amount2s (&ds->denom_balance));
return GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
}
qs = TALER_ARL_edb->get_denomination_revocation (TALER_ARL_edb->cls,
TALER_ARL_esession,
denom_hash,
&msig,
&rowid);
if (0 > qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 < qs)
{
/* check revocation signature */
struct TALER_MasterDenominationKeyRevocationPS rm;
rm.purpose.purpose = htonl (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED);
rm.purpose.size = htonl (sizeof (rm));
rm.h_denom_pub = *denom_hash;
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (
TALER_SIGNATURE_MASTER_DENOMINATION_KEY_REVOKED,
&rm.purpose,
&msig.eddsa_signature,
&TALER_ARL_master_pub.eddsa_pub))
{
report_row_inconsistency ("denomination revocation table",
rowid,
"revocation signature invalid");
}
else
{
ds->was_revoked = GNUNET_YES;
}
}
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&ds->denom_balance));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&ds->denom_loss));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&ds->denom_risk));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&ds->denom_recoup));
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting balance for denomination `%s' is %s\n",
GNUNET_h2s (denom_hash),
TALER_amount2s (&ds->denom_balance));
return GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
}
/**
* Obtain the denomination summary for the given @a dh
*
* @param cc our execution context
* @param issue denomination key information for @a dh
* @param dh the denomination hash to use for the lookup
* @return NULL on error
*/
static struct DenominationSummary *
get_denomination_summary (struct CoinContext *cc,
const struct TALER_DenominationKeyValidityPS *issue,
const struct GNUNET_HashCode *dh)
{
struct DenominationSummary *ds;
ds = GNUNET_CONTAINER_multihashmap_get (cc->denom_summaries,
dh);
if (NULL != ds)
return ds;
ds = GNUNET_new (struct DenominationSummary);
ds->issue = issue;
if (0 > (cc->qs = init_denomination (dh,
ds)))
{
GNUNET_break (0);
GNUNET_free (ds);
return NULL;
}
GNUNET_assert (GNUNET_OK ==
GNUNET_CONTAINER_multihashmap_put (cc->denom_summaries,
dh,
ds,
GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
return ds;
}
/**
* Write information about the current knowledge about a denomination key
* back to the database and update our global TALER_ARL_reporting data about the
* denomination. Also remove and free the memory of @a value.
*
* @param cls the `struct CoinContext`
* @param denom_hash the hash of the denomination key
* @param value a `struct DenominationSummary`
* @return #GNUNET_OK (continue to iterate)
*/
static int
sync_denomination (void *cls,
const struct GNUNET_HashCode *denom_hash,
void *value)
{
struct CoinContext *cc = cls;
struct DenominationSummary *ds = value;
const struct TALER_DenominationKeyValidityPS *issue = ds->issue;
struct GNUNET_TIME_Absolute now;
struct GNUNET_TIME_Absolute expire_deposit;
struct GNUNET_TIME_Absolute expire_deposit_grace;
enum GNUNET_DB_QueryStatus qs;
now = GNUNET_TIME_absolute_get ();
expire_deposit = GNUNET_TIME_absolute_ntoh (issue->expire_deposit);
/* add day grace period to deal with clocks not being perfectly synchronized */
expire_deposit_grace = GNUNET_TIME_absolute_add (expire_deposit,
DEPOSIT_GRACE_PERIOD);
if (now.abs_value_us > expire_deposit_grace.abs_value_us)
{
/* Denominationkey has expired, book remaining balance of
outstanding coins as revenue; and reduce cc->risk exposure. */
if (ds->in_db)
qs = TALER_ARL_adb->del_denomination_balance (TALER_ARL_adb->cls,
TALER_ARL_asession,
denom_hash);
else
qs = GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
if ( (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs) &&
( (0 != ds->denom_risk.value) ||
(0 != ds->denom_risk.fraction) ) )
{
/* The denomination expired and carried a balance; we can now
book the remaining balance as profit, and reduce our risk
exposure by the accumulated risk of the denomination. */
if (GNUNET_SYSERR ==
TALER_amount_subtract (&total_risk,
&total_risk,
&ds->denom_risk))
{
/* Holy smokes, our risk assessment was inconsistent!
This is really, really bad. */
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
}
}
if ( (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qs) &&
( (0 != ds->denom_balance.value) ||
(0 != ds->denom_balance.fraction) ) )
{
/* book denom_balance coin expiration profits! */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Denomination `%s' expired, booking %s in expiration profits\n",
GNUNET_h2s (denom_hash),
TALER_amount2s (&ds->denom_balance));
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT !=
(qs = TALER_ARL_adb->insert_historic_denom_revenue (
TALER_ARL_adb->cls,
TALER_ARL_asession,
&
TALER_ARL_master_pub,
denom_hash,
expire_deposit,
&ds->denom_balance,
&ds->denom_recoup)))
{
/* Failed to store profits? Bad database */
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
}
}
}
else
{
long long cnt;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Final balance for denomination `%s' is %s (%llu)\n",
GNUNET_h2s (denom_hash),
TALER_amount2s (&ds->denom_balance),
(unsigned long long) ds->num_issued);
cnt = TALER_ARL_edb->count_known_coins (TALER_ARL_edb->cls,
TALER_ARL_esession,
denom_hash);
if (0 > cnt)
{
/* Failed to obtain count? Bad database */
qs = (enum GNUNET_DB_QueryStatus) cnt;
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
}
else
{
if (ds->num_issued < (uint64_t) cnt)
{
report_emergency_by_count (issue,
ds->num_issued,
cnt,
&ds->denom_risk);
}
if (GNUNET_YES == ds->report_emergency)
{
report_emergency_by_amount (issue,
&ds->denom_risk,
&ds->denom_loss);
}
if (ds->in_db)
qs = TALER_ARL_adb->update_denomination_balance (TALER_ARL_adb->cls,
TALER_ARL_asession,
denom_hash,
&ds->denom_balance,
&ds->denom_loss,
&ds->denom_risk,
&ds->denom_recoup,
ds->num_issued);
else
qs = TALER_ARL_adb->insert_denomination_balance (TALER_ARL_adb->cls,
TALER_ARL_asession,
denom_hash,
&ds->denom_balance,
&ds->denom_loss,
&ds->denom_risk,
&ds->denom_recoup,
ds->num_issued);
}
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
}
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multihashmap_remove (cc->denom_summaries,
denom_hash,
ds));
GNUNET_free (ds);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != cc->qs)
return GNUNET_SYSERR;
return GNUNET_OK;
}
/**
* Function called with details about all withdraw operations.
* Updates the denomination balance and the overall balance as
* we now have additional coins that have been issued.
*
* Note that the signature was already checked in
* #handle_reserve_out(), so we do not check it again here.
*
* @param cls our `struct CoinContext`
* @param rowid unique serial ID for the refresh session in our DB
* @param h_blind_ev blinded hash of the coin's public key
* @param denom_pub public denomination key of the deposited coin
* @param reserve_pub public key of the reserve
* @param reserve_sig signature over the withdraw operation (verified elsewhere)
* @param execution_date when did the wallet withdraw the coin
* @param amount_with_fee amount that was withdrawn
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
withdraw_cb (void *cls,
uint64_t rowid,
const struct GNUNET_HashCode *h_blind_ev,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_ReserveSignatureP *reserve_sig,
struct GNUNET_TIME_Absolute execution_date,
const struct TALER_Amount *amount_with_fee)
{
struct CoinContext *cc = cls;
struct DenominationSummary *ds;
struct GNUNET_HashCode dh;
const struct TALER_DenominationKeyValidityPS *issue;
struct TALER_Amount value;
enum GNUNET_DB_QueryStatus qs;
(void) h_blind_ev;
(void) reserve_pub;
(void) reserve_sig;
(void) execution_date;
(void) amount_with_fee;
GNUNET_assert (rowid >= ppc.last_withdraw_serial_id); /* should be monotonically increasing */
ppc.last_withdraw_serial_id = rowid + 1;
qs = TALER_ARL_get_denomination_info (denom_pub,
&issue,
&dh);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("withdraw",
rowid,
"denomination key not found");
return GNUNET_OK;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
/* This really ought to be a transient DB error. */
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
ds = get_denomination_summary (cc,
issue,
&dh);
if (NULL == ds)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
TALER_amount_ntoh (&value,
&issue->value);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Issued coin in denomination `%s' of total value %s\n",
GNUNET_h2s (&dh),
TALER_amount2s (&value));
ds->num_issued++;
if (GNUNET_OK !=
TALER_amount_add (&ds->denom_balance,
&ds->denom_balance,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New balance of denomination `%s' is %s\n",
GNUNET_h2s (&dh),
TALER_amount2s (&ds->denom_balance));
if (GNUNET_OK !=
TALER_amount_add (&total_escrow_balance,
&total_escrow_balance,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&total_risk,
&total_risk,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&ds->denom_risk,
&ds->denom_risk,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Closure for #reveal_data_cb().
*/
struct RevealContext
{
/**
* Denomination public keys of the new coins.
*/
struct TALER_DenominationPublicKey *new_dps;
/**
* Size of the @a new_dp and @a new_dps arrays.
*/
unsigned int num_freshcoins;
};
/**
* Function called with information about a refresh order.
*
* @param cls closure
* @param num_freshcoins size of the @a rrcs array
* @param rrcs array of @a num_freshcoins information about coins to be created
* @param num_tprivs number of entries in @a tprivs, should be #TALER_CNC_KAPPA - 1
* @param tprivs array of @e num_tprivs transfer private keys
* @param tp transfer public key information
*/
static void
reveal_data_cb (void *cls,
uint32_t num_freshcoins,
const struct TALER_EXCHANGEDB_RefreshRevealedCoin *rrcs,
unsigned int num_tprivs,
const struct TALER_TransferPrivateKeyP *tprivs,
const struct TALER_TransferPublicKeyP *tp)
{
struct RevealContext *rctx = cls;
(void) num_tprivs;
(void) tprivs;
(void) tp;
rctx->num_freshcoins = num_freshcoins;
rctx->new_dps = GNUNET_new_array (num_freshcoins,
struct TALER_DenominationPublicKey);
for (unsigned int i = 0; i<num_freshcoins; i++)
rctx->new_dps[i].rsa_public_key
= GNUNET_CRYPTO_rsa_public_key_dup (rrcs[i].denom_pub.rsa_public_key);
}
/**
* Check that the @a coin_pub is a known coin with a proper
* signature for denominatinon @a denom_pub. If not, TALER_ARL_report
* a loss of @a loss_potential.
*
* @param coin_pub public key of a coin
* @param denom_pub expected denomination of the coin
* @param loss_potential how big could the loss be if the coin is
* not properly signed
* @return database transaction status, on success
* #GNUNET_DB_STATUS_SUCCESS_ONE_RESULT
*/
static enum GNUNET_DB_QueryStatus
check_known_coin (const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_Amount *loss_potential)
{
struct TALER_CoinPublicInfo ci;
enum GNUNET_DB_QueryStatus qs;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Checking denomination signature on %s\n",
TALER_B2S (coin_pub));
qs = TALER_ARL_edb->get_known_coin (TALER_ARL_edb->cls,
TALER_ARL_esession,
coin_pub,
&ci);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (GNUNET_YES !=
TALER_test_coin_valid (&ci,
denom_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "known-coin",
"row", (json_int_t) -1,
"loss", TALER_JSON_from_amount (
loss_potential),
"key_pub", GNUNET_JSON_from_data_auto (
coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
loss_potential));
}
GNUNET_CRYPTO_rsa_signature_free (ci.denom_sig.rsa_signature);
return qs;
}
/**
* Function called with details about coins that were melted, with the
* goal of auditing the refresh's execution. Verifies the signature
* and updates our information about coins outstanding (the old coin's
* denomination has less, the fresh coins increased outstanding
* balances).
*
* @param cls closure
* @param rowid unique serial ID for the refresh session in our DB
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param coin_sig signature from the coin
* @param amount_with_fee amount that was deposited including fee
* @param noreveal_index which index was picked by the exchange in cut-and-choose
* @param rc what is the refresh commitment
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
refresh_session_cb (void *cls,
uint64_t rowid,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_Amount *amount_with_fee,
uint32_t noreveal_index,
const struct TALER_RefreshCommitmentP *rc)
{
struct CoinContext *cc = cls;
struct TALER_RefreshMeltCoinAffirmationPS rmc;
const struct TALER_DenominationKeyValidityPS *issue;
struct DenominationSummary *dso;
struct TALER_Amount amount_without_fee;
struct TALER_Amount tmp;
enum GNUNET_DB_QueryStatus qs;
(void) noreveal_index;
GNUNET_assert (rowid >= ppc.last_melt_serial_id); /* should be monotonically increasing */
ppc.last_melt_serial_id = rowid + 1;
qs = TALER_ARL_get_denomination_info (denom_pub,
&issue,
NULL);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("melt",
rowid,
"denomination key not found");
return GNUNET_OK;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
qs = check_known_coin (coin_pub,
denom_pub,
amount_with_fee);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
/* verify melt signature */
rmc.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_MELT);
rmc.purpose.size = htonl (sizeof (rmc));
rmc.rc = *rc;
TALER_amount_hton (&rmc.amount_with_fee,
amount_with_fee);
rmc.melt_fee = issue->fee_refresh;
rmc.coin_pub = *coin_pub;
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_MELT,
&rmc.purpose,
&coin_sig->eddsa_signature,
&coin_pub->eddsa_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "melt",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (
amount_with_fee),
"key_pub", GNUNET_JSON_from_data_auto (
coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount_with_fee));
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Melting coin %s in denomination `%s' of value %s\n",
TALER_B2S (coin_pub),
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (amount_with_fee));
{
struct RevealContext reveal_ctx;
struct TALER_Amount refresh_cost;
int err;
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (amount_with_fee->currency,
&refresh_cost));
memset (&reveal_ctx,
0,
sizeof (reveal_ctx));
qs = TALER_ARL_edb->get_refresh_reveal (TALER_ARL_edb->cls,
TALER_ARL_esession,
rc,
&reveal_data_cb,
&reveal_ctx);
if (0 > qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if ( (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs) ||
(0 == reveal_ctx.num_freshcoins) )
{
/* This can happen if /refresh/reveal was not yet called or only
with invalid data, even if the exchange is correctly
operating. We still TALER_ARL_report it. */
TALER_ARL_report (report_refreshs_hanging,
json_pack ("{s:I, s:o, s:o}",
"row", (json_int_t) rowid,
"amount", TALER_JSON_from_amount (
amount_with_fee),
"coin_pub", GNUNET_JSON_from_data_auto (
coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_refresh_hanging,
&total_refresh_hanging,
amount_with_fee));
return GNUNET_OK;
}
{
const struct TALER_DenominationKeyValidityPS *new_issues[reveal_ctx.
num_freshcoins];
/* Update outstanding amounts for all new coin's denominations, and check
that the resulting amounts are consistent with the value being refreshed. */
err = GNUNET_OK;
for (unsigned int i = 0; i<reveal_ctx.num_freshcoins; i++)
{
/* lookup new coin denomination key */
qs = TALER_ARL_get_denomination_info (&reveal_ctx.new_dps[i],
&new_issues[i],
NULL);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("refresh_reveal",
rowid,
"denomination key not found");
err = GNUNET_NO; /* terminate, but return "OK" */
}
else if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
err = GNUNET_SYSERR; /* terminate, return GNUNET_SYSERR */
}
GNUNET_CRYPTO_rsa_public_key_free (
reveal_ctx.new_dps[i].rsa_public_key);
reveal_ctx.new_dps[i].rsa_public_key = NULL;
}
GNUNET_free (reveal_ctx.new_dps);
reveal_ctx.new_dps = NULL;
if (GNUNET_OK != err)
return (GNUNET_SYSERR == err) ? GNUNET_SYSERR : GNUNET_OK;
/* calculate total refresh cost */
for (unsigned int i = 0; i<reveal_ctx.num_freshcoins; i++)
{
/* update cost of refresh */
struct TALER_Amount fee;
struct TALER_Amount value;
TALER_amount_ntoh (&fee,
&new_issues[i]->fee_withdraw);
TALER_amount_ntoh (&value,
&new_issues[i]->value);
if ( (GNUNET_OK !=
TALER_amount_add (&refresh_cost,
&refresh_cost,
&fee)) ||
(GNUNET_OK !=
TALER_amount_add (&refresh_cost,
&refresh_cost,
&value)) )
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
}
/* compute contribution of old coin */
{
struct TALER_Amount melt_fee;
TALER_amount_ntoh (&melt_fee,
&issue->fee_refresh);
if (GNUNET_OK !=
TALER_amount_subtract (&amount_without_fee,
amount_with_fee,
&melt_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
}
/* check old coin covers complete expenses */
if (1 == TALER_amount_cmp (&refresh_cost,
&amount_without_fee))
{
/* refresh_cost > amount_without_fee */
report_amount_arithmetic_inconsistency ("melt (fee)",
rowid,
&amount_without_fee,
&refresh_cost,
-1);
return GNUNET_OK;
}
/* update outstanding denomination amounts */
for (unsigned int i = 0; i<reveal_ctx.num_freshcoins; i++)
{
struct DenominationSummary *dsi;
struct TALER_Amount value;
dsi = get_denomination_summary (cc,
new_issues[i],
&new_issues[i]->denom_hash);
if (NULL == dsi)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
TALER_amount_ntoh (&value,
&new_issues[i]->value);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Created fresh coin in denomination `%s' of value %s\n",
GNUNET_h2s (&new_issues[i]->denom_hash),
TALER_amount2s (&value));
dsi->num_issued++;
if (GNUNET_OK !=
TALER_amount_add (&dsi->denom_balance,
&dsi->denom_balance,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&dsi->denom_risk,
&dsi->denom_risk,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New balance of denomination `%s' is %s\n",
GNUNET_h2s (&new_issues[i]->denom_hash),
TALER_amount2s (&dsi->denom_balance));
if (GNUNET_OK !=
TALER_amount_add (&total_escrow_balance,
&total_escrow_balance,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&total_risk,
&total_risk,
&value))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
}
}
}
/* update old coin's denomination balance */
dso = get_denomination_summary (cc,
issue,
&issue->denom_hash);
if (NULL == dso)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (GNUNET_SYSERR ==
TALER_amount_subtract (&tmp,
&dso->denom_balance,
amount_with_fee))
{
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&dso->denom_loss,
&dso->denom_loss,
amount_with_fee));
dso->report_emergency = GNUNET_YES;
}
else
{
dso->denom_balance = tmp;
}
if (-1 == TALER_amount_cmp (&total_escrow_balance,
amount_with_fee))
{
/* This can theoretically happen if for example the exchange
never issued any coins (i.e. escrow balance is zero), but
accepted a forged coin (i.e. emergency situation after
private key compromise). In that case, we cannot even
subtract the profit we make from the fee from the escrow
balance. Tested as part of test-auditor.sh, case #18 */report_amount_arithmetic_inconsistency (
"subtracting refresh fee from escrow balance",
rowid,
&total_escrow_balance,
amount_with_fee,
0);
}
else
{
GNUNET_assert (GNUNET_SYSERR !=
TALER_amount_subtract (&total_escrow_balance,
&total_escrow_balance,
amount_with_fee));
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New balance of denomination `%s' after melt is %s\n",
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (&dso->denom_balance));
/* update global melt fees */
{
struct TALER_Amount rfee;
TALER_amount_ntoh (&rfee,
&issue->fee_refresh);
if (GNUNET_OK !=
TALER_amount_add (&total_melt_fee_income,
&total_melt_fee_income,
&rfee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
}
/* We're good! */
return GNUNET_OK;
}
/**
* Function called with details about deposits that have been made,
* with the goal of auditing the deposit's execution.
*
* @param cls closure
* @param rowid unique serial ID for the deposit in our DB
* @param timestamp when did the deposit happen
* @param merchant_pub public key of the merchant
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param coin_sig signature from the coin
* @param amount_with_fee amount that was deposited including fee
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @param refund_deadline by which the merchant adviced that he might want
* to get a refund
* @param wire_deadline by which the merchant adviced that he would like the
* wire transfer to be executed
* @param receiver_wire_account wire details for the merchant, NULL from iterate_matching_deposits()
* @param done flag set if the deposit was already executed (or not)
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
deposit_cb (void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute timestamp,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_Amount *amount_with_fee,
const struct GNUNET_HashCode *h_contract_terms,
struct GNUNET_TIME_Absolute refund_deadline,
struct GNUNET_TIME_Absolute wire_deadline,
const json_t *receiver_wire_account,
int done)
{
struct CoinContext *cc = cls;
const struct TALER_DenominationKeyValidityPS *issue;
struct DenominationSummary *ds;
struct TALER_DepositRequestPS dr;
struct TALER_Amount tmp;
enum GNUNET_DB_QueryStatus qs;
(void) wire_deadline;
(void) done;
GNUNET_assert (rowid >= ppc.last_deposit_serial_id); /* should be monotonically increasing */
ppc.last_deposit_serial_id = rowid + 1;
qs = TALER_ARL_get_denomination_info (denom_pub,
&issue,
NULL);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("deposits",
rowid,
"denomination key not found");
return GNUNET_OK;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
qs = check_known_coin (coin_pub,
denom_pub,
amount_with_fee);
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
/* Verify deposit signature */
dr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_DEPOSIT);
dr.purpose.size = htonl (sizeof (dr));
dr.h_contract_terms = *h_contract_terms;
if (GNUNET_OK !=
TALER_JSON_merchant_wire_signature_hash (receiver_wire_account,
&dr.h_wire))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "deposit",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (
amount_with_fee),
"key_pub", GNUNET_JSON_from_data_auto (
coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount_with_fee));
return GNUNET_OK;
}
dr.timestamp = GNUNET_TIME_absolute_hton (timestamp);
dr.refund_deadline = GNUNET_TIME_absolute_hton (refund_deadline);
TALER_amount_hton (&dr.amount_with_fee,
amount_with_fee);
dr.deposit_fee = issue->fee_deposit;
dr.merchant = *merchant_pub;
dr.coin_pub = *coin_pub;
/* NOTE: This is one of the operations we might eventually
want to do in parallel in the background to improve
auditor performance! */
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_DEPOSIT,
&dr.purpose,
&coin_sig->eddsa_signature,
&coin_pub->eddsa_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "deposit",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (
amount_with_fee),
"key_pub", GNUNET_JSON_from_data_auto (
coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount_with_fee));
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Deposited coin %s in denomination `%s' of value %s\n",
TALER_B2S (coin_pub),
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (amount_with_fee));
/* update old coin's denomination balance */
ds = get_denomination_summary (cc,
issue,
&issue->denom_hash);
if (NULL == ds)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (GNUNET_SYSERR ==
TALER_amount_subtract (&tmp,
&ds->denom_balance,
amount_with_fee))
{
GNUNET_assert (GNUNET_OK ==
TALER_amount_add (&ds->denom_loss,
&ds->denom_loss,
amount_with_fee));
ds->report_emergency = GNUNET_YES;
}
else
{
ds->denom_balance = tmp;
}
if (-1 == TALER_amount_cmp (&total_escrow_balance,
amount_with_fee))
{
/* This can theoretically happen if for example the exchange
never issued any coins (i.e. escrow balance is zero), but
accepted a forged coin (i.e. emergency situation after
private key compromise). In that case, we cannot even
subtract the profit we make from the fee from the escrow
balance. Tested as part of test-auditor.sh, case #18 */report_amount_arithmetic_inconsistency (
"subtracting deposit fee from escrow balance",
rowid,
&total_escrow_balance,
amount_with_fee,
0);
}
else
{
GNUNET_assert (GNUNET_SYSERR !=
TALER_amount_subtract (&total_escrow_balance,
&total_escrow_balance,
amount_with_fee));
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New balance of denomination `%s' after deposit is %s\n",
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (&ds->denom_balance));
/* update global up melt fees */
{
struct TALER_Amount dfee;
TALER_amount_ntoh (&dfee,
&issue->fee_deposit);
if (GNUNET_OK !=
TALER_amount_add (&total_deposit_fee_income,
&total_deposit_fee_income,
&dfee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
}
return GNUNET_OK;
}
/**
* Function called with details about coins that were refunding,
* with the goal of auditing the refund's execution. Adds the
* refunded amount back to the outstanding balance of the respective
* denomination.
*
* @param cls closure
* @param rowid unique serial ID for the refund in our DB
* @param denom_pub denomination public key of @a coin_pub
* @param coin_pub public key of the coin
* @param merchant_pub public key of the merchant
* @param merchant_sig signature of the merchant
* @param h_contract_terms hash of the proposal data known to merchant and customer
* @param rtransaction_id refund transaction ID chosen by the merchant
* @param amount_with_fee amount that was deposited including fee
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
refund_cb (void *cls,
uint64_t rowid,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendPublicKeyP *coin_pub,
const struct TALER_MerchantPublicKeyP *merchant_pub,
const struct TALER_MerchantSignatureP *merchant_sig,
const struct GNUNET_HashCode *h_contract_terms,
uint64_t rtransaction_id,
const struct TALER_Amount *amount_with_fee)
{
struct CoinContext *cc = cls;
const struct TALER_DenominationKeyValidityPS *issue;
struct DenominationSummary *ds;
struct TALER_RefundRequestPS rr;
struct TALER_Amount amount_without_fee;
struct TALER_Amount refund_fee;
enum GNUNET_DB_QueryStatus qs;
GNUNET_assert (rowid >= ppc.last_refund_serial_id); /* should be monotonically increasing */
ppc.last_refund_serial_id = rowid + 1;
qs = TALER_ARL_get_denomination_info (denom_pub,
&issue,
NULL);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("refunds",
rowid,
"denomination key not found");
return GNUNET_SYSERR;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return GNUNET_SYSERR;
}
/* verify refund signature */
rr.purpose.purpose = htonl (TALER_SIGNATURE_MERCHANT_REFUND);
rr.purpose.size = htonl (sizeof (rr));
rr.h_contract_terms = *h_contract_terms;
rr.coin_pub = *coin_pub;
rr.merchant = *merchant_pub;
rr.rtransaction_id = GNUNET_htonll (rtransaction_id);
TALER_amount_hton (&rr.refund_amount,
amount_with_fee);
rr.refund_fee = issue->fee_refund;
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_MERCHANT_REFUND,
&rr.purpose,
&merchant_sig->eddsa_sig,
&merchant_pub->eddsa_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "refund",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (
amount_with_fee),
"key_pub", GNUNET_JSON_from_data_auto (
merchant_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount_with_fee));
return GNUNET_OK;
}
TALER_amount_ntoh (&refund_fee,
&issue->fee_refund);
if (GNUNET_OK !=
TALER_amount_subtract (&amount_without_fee,
amount_with_fee,
&refund_fee))
{
report_amount_arithmetic_inconsistency ("refund (fee)",
rowid,
&amount_without_fee,
&refund_fee,
-1);
return GNUNET_OK;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Refunding coin %s in denomination `%s' value %s\n",
TALER_B2S (coin_pub),
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (amount_with_fee));
/* update coin's denomination balance */
ds = get_denomination_summary (cc,
issue,
&issue->denom_hash);
if (NULL == ds)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&ds->denom_balance,
&ds->denom_balance,
&amount_without_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&ds->denom_risk,
&ds->denom_risk,
&amount_without_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&total_escrow_balance,
&total_escrow_balance,
&amount_without_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
if (GNUNET_OK !=
TALER_amount_add (&total_risk,
&total_risk,
&amount_without_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"New balance of denomination `%s' after refund is %s\n",
GNUNET_h2s (&issue->denom_hash),
TALER_amount2s (&ds->denom_balance));
/* update total refund fee balance */
if (GNUNET_OK !=
TALER_amount_add (&total_refund_fee_income,
&total_refund_fee_income,
&refund_fee))
{
GNUNET_break (0);
cc->qs = GNUNET_DB_STATUS_HARD_ERROR;
return GNUNET_SYSERR;
}
return GNUNET_OK;
}
/**
* Check that the recoup operation was properly initiated by a coin
* and update the denomination's losses accordingly.
*
* @param cc the context with details about the coin
* @param rowid row identifier used to uniquely identify the recoup operation
* @param amount how much should be added back to the reserve
* @param coin public information about the coin
* @param denom_pub public key of the denomionation of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
check_recoup (struct CoinContext *cc,
uint64_t rowid,
const struct TALER_Amount *amount,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind)
{
struct TALER_RecoupRequestPS pr;
struct DenominationSummary *ds;
enum GNUNET_DB_QueryStatus qs;
const struct TALER_DenominationKeyValidityPS *issue;
if (GNUNET_OK !=
TALER_test_coin_valid (coin,
denom_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "recoup",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (amount),
"key_pub", GNUNET_JSON_from_data_auto (
&pr.h_denom_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount));
}
qs = TALER_ARL_get_denomination_info (denom_pub,
&issue,
&pr.h_denom_pub);
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qs)
{
report_row_inconsistency ("recoup",
rowid,
"denomination key not found");
return GNUNET_OK;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT != qs)
{
/* The key not existing should be prevented by foreign key constraints,
so must be a transient DB error. */
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
cc->qs = qs;
return GNUNET_SYSERR;
}
pr.purpose.purpose = htonl (TALER_SIGNATURE_WALLET_COIN_RECOUP);
pr.purpose.size = htonl (sizeof (pr));
pr.coin_pub = coin->coin_pub;
pr.coin_blind = *coin_blind;
if (GNUNET_OK !=
GNUNET_CRYPTO_eddsa_verify (TALER_SIGNATURE_WALLET_COIN_RECOUP,
&pr.purpose,
&coin_sig->eddsa_signature,
&coin->coin_pub.eddsa_pub))
{
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation", "recoup",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (amount),
"coin_pub", GNUNET_JSON_from_data_auto (
&coin->coin_pub)));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_bad_sig_loss,
&total_bad_sig_loss,
amount));
return GNUNET_OK;
}
ds = get_denomination_summary (cc,
issue,
&issue->denom_hash);
if (GNUNET_NO == ds->was_revoked)
{
/* Woopsie, we allowed recoup on non-revoked denomination!? */
TALER_ARL_report (report_bad_sig_losses,
json_pack ("{s:s, s:I, s:o, s:o}",
"operation",
"recoup (denomination not revoked)",
"row", (json_int_t) rowid,
"loss", TALER_JSON_from_amount (amount),
"coin_pub", GNUNET_JSON_from_data_auto (
&coin->coin_pub)));
}
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&ds->denom_recoup,
&ds->denom_recoup,
amount));
GNUNET_break (GNUNET_OK ==
TALER_amount_add (&total_recoup_loss,
&total_recoup_loss,
amount));
return GNUNET_OK;
}
/**
* Function called about recoups the exchange has to perform.
*
* @param cls a `struct CoinContext *`
* @param rowid row identifier used to uniquely identify the recoup operation
* @param timestamp when did we receive the recoup request
* @param amount how much should be added back to the reserve
* @param reserve_pub public key of the reserve
* @param coin public information about the coin
* @param denom_pub denomination public key of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
recoup_cb (void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute timestamp,
const struct TALER_Amount *amount,
const struct TALER_ReservePublicKeyP *reserve_pub,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind)
{
struct CoinContext *cc = cls;
(void) timestamp;
(void) reserve_pub;
return check_recoup (cc,
rowid,
amount,
coin,
denom_pub,
coin_sig,
coin_blind);
}
/**
* Function called about recoups on refreshed coins the exchange has to
* perform.
*
* @param cls a `struct CoinContext *`
* @param rowid row identifier used to uniquely identify the recoup operation
* @param timestamp when did we receive the recoup request
* @param amount how much should be added back to the reserve
* @param old_coin_pub original coin that was refreshed to create @a coin
* @param coin public information about the coin
* @param denom_pub denomination public key of @a coin
* @param coin_sig signature with @e coin_pub of type #TALER_SIGNATURE_WALLET_COIN_RECOUP
* @param coin_blind blinding factor used to blind the coin
* @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to stop
*/
static int
recoup_refresh_cb (void *cls,
uint64_t rowid,
struct GNUNET_TIME_Absolute timestamp,
const struct TALER_Amount *amount,
const struct TALER_CoinSpendPublicKeyP *old_coin_pub,
const struct TALER_CoinPublicInfo *coin,
const struct TALER_DenominationPublicKey *denom_pub,
const struct TALER_CoinSpendSignatureP *coin_sig,
const struct TALER_DenominationBlindingKeyP *coin_blind)
{
struct CoinContext *cc = cls;
(void) timestamp;
(void) old_coin_pub;
return check_recoup (cc,
rowid,
amount,
coin,
denom_pub,
coin_sig,
coin_blind);
}
/**
* Analyze the exchange's processing of coins.
*
* @param cls closure
* @return transaction status code
*/
static enum GNUNET_DB_QueryStatus
analyze_coins (void *cls)
{
struct CoinContext cc;
enum GNUNET_DB_QueryStatus qs;
enum GNUNET_DB_QueryStatus qsx;
enum GNUNET_DB_QueryStatus qsp;
(void) cls;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Analyzing coins\n");
qsp = TALER_ARL_adb->get_auditor_progress_coin (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&ppc);
if (0 > qsp)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qsp);
return qsp;
}
if (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS == qsp)
{
GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE,
"First analysis using this auditor, starting from scratch\n");
}
else
{
ppc_start = ppc;
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Resuming coin audit at %llu/%llu/%llu/%llu/%llu\n",
(unsigned long long) ppc.last_deposit_serial_id,
(unsigned long long) ppc.last_melt_serial_id,
(unsigned long long) ppc.last_refund_serial_id,
(unsigned long long) ppc.last_withdraw_serial_id,
(unsigned long long) ppc.last_recoup_refresh_serial_id);
}
/* setup 'cc' */
cc.qs = GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
cc.denom_summaries = GNUNET_CONTAINER_multihashmap_create (256,
GNUNET_NO);
qsx = TALER_ARL_adb->get_balance_summary (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&total_escrow_balance,
&total_deposit_fee_income,
&total_melt_fee_income,
&total_refund_fee_income,
&total_risk,
&total_recoup_loss,
&total_irregular_recoups);
if (0 > qsx)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qsx);
return qsx;
}
/* process withdrawals */
if (0 >
(qs = TALER_ARL_edb->select_withdrawals_above_serial_id (
TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.
last_withdraw_serial_id,
&withdraw_cb,
&cc)) )
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
/* process refunds */
if (0 >
(qs = TALER_ARL_edb->select_refunds_above_serial_id (TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.
last_refund_serial_id,
&refund_cb,
&cc)))
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
/* process refreshs */
if (0 >
(qs = TALER_ARL_edb->select_refreshes_above_serial_id (TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.
last_melt_serial_id,
&refresh_session_cb,
&cc)))
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
/* process deposits */
if (0 >
(qs = TALER_ARL_edb->select_deposits_above_serial_id (TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.
last_deposit_serial_id,
&deposit_cb,
&cc)))
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
/* process recoups */
if (0 >
(qs = TALER_ARL_edb->select_recoup_above_serial_id (TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.
last_recoup_serial_id,
&recoup_cb,
&cc)))
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
if (0 >
(qs = TALER_ARL_edb->select_recoup_refresh_above_serial_id (
TALER_ARL_edb->cls,
TALER_ARL_esession,
ppc.last_recoup_refresh_serial_id,
&recoup_refresh_cb,
&cc)))
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (0 > cc.qs)
return cc.qs;
/* sync 'cc' back to disk */
cc.qs = GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;
GNUNET_CONTAINER_multihashmap_iterate (cc.denom_summaries,
&sync_denomination,
&cc);
GNUNET_CONTAINER_multihashmap_destroy (cc.denom_summaries);
if (0 > cc.qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == cc.qs);
return cc.qs;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qsx)
qs = TALER_ARL_adb->update_balance_summary (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&total_escrow_balance,
&total_deposit_fee_income,
&total_melt_fee_income,
&total_refund_fee_income,
&total_risk,
&total_recoup_loss,
&total_irregular_recoups);
else
qs = TALER_ARL_adb->insert_balance_summary (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&total_escrow_balance,
&total_deposit_fee_income,
&total_melt_fee_income,
&total_refund_fee_income,
&total_risk,
&total_recoup_loss,
&total_irregular_recoups);
if (0 >= qs)
{
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
if (GNUNET_DB_STATUS_SUCCESS_ONE_RESULT == qsp)
qs = TALER_ARL_adb->update_auditor_progress_coin (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&ppc);
else
qs = TALER_ARL_adb->insert_auditor_progress_coin (TALER_ARL_adb->cls,
TALER_ARL_asession,
&TALER_ARL_master_pub,
&ppc);
if (0 >= qs)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
"Failed to update auditor DB, not recording progress\n");
GNUNET_break (GNUNET_DB_STATUS_SOFT_ERROR == qs);
return qs;
}
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_ ("Concluded coin audit step at %llu/%llu/%llu/%llu/%llu\n"),
(unsigned long long) ppc.last_deposit_serial_id,
(unsigned long long) ppc.last_melt_serial_id,
(unsigned long long) ppc.last_refund_serial_id,
(unsigned long long) ppc.last_withdraw_serial_id,
(unsigned long long) ppc.last_recoup_refresh_serial_id);
return qs;
}
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param TALER_ARL_cfgfile name of the configuration file used (for saving, can be NULL!)
* @param c configuration
*/
static void
run (void *cls,
char *const *args,
const char *TALER_ARL_cfgfile,
const struct GNUNET_CONFIGURATION_Handle *c)
{
json_t *report;
(void) cls;
(void) args;
(void) TALER_ARL_cfgfile;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Launching auditor\n");
if (GNUNET_OK !=
TALER_ARL_init (c))
{
global_ret = 1;
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting audit\n");
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&reported_emergency_loss));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&
reported_emergency_risk_by_amount));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&
reported_emergency_risk_by_count));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&
reported_emergency_loss_by_count));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_escrow_balance));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_risk));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_recoup_loss));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_irregular_recoups));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_deposit_fee_income));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_melt_fee_income));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_refund_fee_income));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_arithmetic_delta_plus));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_arithmetic_delta_minus));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_bad_sig_loss));
GNUNET_assert (GNUNET_OK ==
TALER_amount_get_zero (TALER_ARL_currency,
&total_refresh_hanging));
GNUNET_assert (NULL !=
(report_emergencies = json_array ()));
GNUNET_assert (NULL !=
(report_emergencies_by_count = json_array ()));
GNUNET_assert (NULL !=
(report_row_inconsistencies = json_array ()));
GNUNET_assert (NULL !=
(report_amount_arithmetic_inconsistencies =
json_array ()));
GNUNET_assert (NULL !=
(report_bad_sig_losses = json_array ()));
GNUNET_assert (NULL !=
(report_refreshs_hanging = json_array ()));
if (GNUNET_OK !=
TALER_ARL_setup_sessions_and_run (&analyze_coins,
NULL))
{
global_ret = 1;
return;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Audit complete\n");
report = json_pack ("{s:o, s:o, s:o, s:o, s:o,"
" s:o, s:o, s:o, s:o, s:o,"
" s:o, s:o, s:o, s:o, s:o,"
" s:o, s:o, s:o, s:o, s:o,"
" s:I, s:I, s:I, s:I, s:I,"
" s:I, s:I, s:I, s:I, s:I,"
" s:I, s:I, s:o, s:o, s:o}",
/* Block #1 */
"total_escrow_balance",
TALER_JSON_from_amount (&total_escrow_balance),
"total_active_risk",
TALER_JSON_from_amount (&total_risk),
"total_deposit_fee_income",
TALER_JSON_from_amount (
&total_deposit_fee_income),
"total_melt_fee_income",
TALER_JSON_from_amount (&total_melt_fee_income),
"total_refund_fee_income",
TALER_JSON_from_amount (
&total_refund_fee_income),
/* Block #2 */
/* Tested in test-auditor.sh #18 */
"emergencies",
report_emergencies,
/* Tested in test-auditor.sh #18 */
"emergencies_risk_by_amount",
TALER_JSON_from_amount (
&reported_emergency_risk_by_amount),
/* Tested in test-auditor.sh #4/#5/#6/#13/#26 */
"bad_sig_losses",
report_bad_sig_losses,
/* Tested in test-auditor.sh #4/#5/#6/#13/#26 */
"total_bad_sig_loss",
TALER_JSON_from_amount (&total_bad_sig_loss),
/* FIXME: Tested in test-auditor.sh #?? */
"row_inconsistencies",
report_row_inconsistencies,
/* Block #3 */
/* Tested in test-auditor.sh #18 */
"amount_arithmetic_inconsistencies",
report_amount_arithmetic_inconsistencies,
"total_arithmetic_delta_plus",
TALER_JSON_from_amount (
&total_arithmetic_delta_plus),
"total_arithmetic_delta_minus",
TALER_JSON_from_amount (
&total_arithmetic_delta_minus),
/* Tested in test-auditor.sh #12 */
"total_refresh_hanging",
TALER_JSON_from_amount (&total_refresh_hanging),
/* Tested in test-auditor.sh #12 */
"refresh_hanging",
report_refreshs_hanging,
/* Block #4 */
"total_recoup_loss",
TALER_JSON_from_amount (&total_recoup_loss),
/* Tested in test-auditor.sh #18 */
"emergencies_by_count",
report_emergencies_by_count,
/* Tested in test-auditor.sh #18 */
"emergencies_risk_by_count",
TALER_JSON_from_amount (
&reported_emergency_risk_by_count),
/* Tested in test-auditor.sh #18 */
"emergencies_loss",
TALER_JSON_from_amount (
&reported_emergency_loss),
/* Tested in test-auditor.sh #18 */
"emergencies_loss_by_count",
TALER_JSON_from_amount (
&reported_emergency_loss_by_count),
/* Block #5 */
"start_ppc_withdraw_serial_id",
(json_int_t) ppc_start.last_withdraw_serial_id,
"start_ppc_deposit_serial_id",
(json_int_t) ppc_start.last_deposit_serial_id,
"start_ppc_melt_serial_id",
(json_int_t) ppc_start.last_melt_serial_id,
"start_ppc_refund_serial_id",
(json_int_t) ppc_start.last_refund_serial_id,
"start_ppc_recoup_serial_id",
(json_int_t) ppc_start.last_recoup_serial_id,
/* Block #6 */
"start_ppc_recoup_refresh_serial_id",
(json_int_t) ppc_start.
last_recoup_refresh_serial_id,
"end_ppc_withdraw_serial_id",
(json_int_t) ppc.last_withdraw_serial_id,
"end_ppc_deposit_serial_id",
(json_int_t) ppc.last_deposit_serial_id,
"end_ppc_melt_serial_id",
(json_int_t) ppc.last_melt_serial_id,
"end_ppc_refund_serial_id",
(json_int_t) ppc.last_refund_serial_id,
/* Block #7 */
"end_ppc_recoup_serial_id",
(json_int_t) ppc.last_recoup_serial_id,
"end_ppc_recoup_refresh_serial_id",
(json_int_t) ppc.last_recoup_refresh_serial_id,
"auditor_start_time",
TALER_ARL_json_from_time_abs (
start_time),
"auditor_end_time",
TALER_ARL_json_from_time_abs (
GNUNET_TIME_absolute_get ()),
"total_irregular_recoups",
TALER_JSON_from_amount (
&total_irregular_recoups)
);
GNUNET_break (NULL != report);
TALER_ARL_done (report);
}
/**
* The main function of the database initialization tool.
* Used to initialize the Taler Exchange's database.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc,
char *const *argv)
{
const struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_option_base32_auto ('m',
"exchange-key",
"KEY",
"public key of the exchange (Crockford base32 encoded)",
&TALER_ARL_master_pub),
GNUNET_GETOPT_option_timetravel ('T',
"timetravel"),
GNUNET_GETOPT_OPTION_END
};
/* force linker to link against libtalerutil; if we do
not do this, the linker may "optimize" libtalerutil
away and skip #TALER_OS_init(), which we do need */
(void) TALER_project_data_default ();
GNUNET_assert (GNUNET_OK ==
GNUNET_log_setup ("taler-helper-auditor-coins",
"MESSAGE",
NULL));
if (GNUNET_OK !=
GNUNET_PROGRAM_run (argc,
argv,
"taler-helper-auditor-coins",
"Audit Taler coin processing",
options,
&run,
NULL))
return 1;
return global_ret;
}
/* end of taler-auditor.c */
|