aboutsummaryrefslogtreecommitdiff
path: root/src/include/taler_auditordb_plugin.h
blob: 170a68fdd4aee9ffe64c94d99a352265cc4c8cfb (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
/*
  This file is part of TALER
  Copyright (C) 2014-2017 Inria and GNUnet e.V.

  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 include/taler_auditordb_plugin.h
 * @brief Low-level (statement-level) database access for the auditor
 * @author Florian Dold
 * @author Christian Grothoff
 */
#ifndef TALER_AUDITORDB_PLUGIN_H
#define TALER_AUDITORDB_PLUGIN_H

#include <jansson.h>
#include <gnunet/gnunet_util_lib.h>
#include "taler_auditordb_lib.h"
#include "taler_signatures.h"


/**
 * Function called with the results of select_denomination_info()
 *
 * @param cls closure
 * @param issue issuing information with value, fees and other info about the denomination.
 *
 * @return sets the return value of select_denomination_info(),
 *         #GNUNET_OK to continue,
 *         #GNUNET_NO to stop processing further rows
 *         #GNUNET_SYSERR or other values on error.
 */
typedef int
(*TALER_AUDITORDB_DenominationInfoDataCallback)(void *cls,
                                                const struct TALER_DenominationKeyValidityPS *issue);


/**
 * Function called with the results of select_historic_denom_revenue()
 *
 * @param cls closure
 * @param denom_pub_hash hash of the denomination key
 * @param revenue_timestamp when did this profit get realized
 * @param revenue_balance what was the total profit made from
 *                        deposit fees, melting fees, refresh fees
 *                        and coins that were never returned?
 * @return sets the return value of select_denomination_info(),
 *         #GNUNET_OK to continue,
 *         #GNUNET_NO to stop processing further rows
 *         #GNUNET_SYSERR or other values on error.
 */
typedef int
(*TALER_AUDITORDB_HistoricDenominationRevenueDataCallback)(void *cls,
                                                           const struct GNUNET_HashCode *denom_pub_hash,
                                                           struct GNUNET_TIME_Absolute revenue_timestamp,
                                                           const struct TALER_Amount *revenue_balance);


/**
 * Function called with the results of select_historic_losses()
 *
 * @param cls closure
 * @param denom_pub_hash hash of the denomination key
 * @param loss_timestamp when did this profit get realized
 * @param loss_balance what was the total loss
 *
 * @return sets the return value of select_denomination_info(),
 *         #GNUNET_OK to continue,
 *         #GNUNET_NO to stop processing further rows
 *         #GNUNET_SYSERR or other values on error.
 */
typedef int
(*TALER_AUDITORDB_HistoricLossesDataCallback)(void *cls,
                                              const struct GNUNET_HashCode *denom_pub_hash,
                                              struct GNUNET_TIME_Absolute loss_timestamp,
                                              const struct TALER_Amount *loss_balance);


/**
 * Function called with the results of select_historic_reserve_revenue()
 *
 * @param cls closure
 * @param start_time beginning of aggregated time interval
 * @param end_time end of aggregated time interval
 * @param reserve_profits total profits made
 *
 * @return sets the return value of select_denomination_info(),
 *         #GNUNET_OK to continue,
 *         #GNUNET_NO to stop processing further rows
 *         #GNUNET_SYSERR or other values on error.
 */
typedef int
(*TALER_AUDITORDB_HistoricReserveRevenueDataCallback)(void *cls,
                                                      struct GNUNET_TIME_Absolute start_time,
                                                      struct GNUNET_TIME_Absolute end_time,
                                                      const struct TALER_Amount *reserve_profits);


/**
 * Structure for remembering the auditor's progress over the
 * various tables and (auditor) transactions.
 */
struct TALER_AUDITORDB_ProgressPoint
{
  /**
   * last_reserve_in_serial_id serial ID of the last reserve_in transfer the auditor processed
   */
  uint64_t last_reserve_in_serial_id;

  /**
   * last_reserve_out_serial_id serial ID of the last reserve_out the auditor processed
   */
  uint64_t last_reserve_out_serial_id;

  /**
   * last_payback_serial_id serial ID of the last payback entry the auditor processed when
   * considering reserves.
   */
  uint64_t last_reserve_payback_serial_id;

  /**
   * last_reserve_close_serial_id serial ID of the last reserve_close
   * entry the auditor processed.
   */
  uint64_t last_reserve_close_serial_id;

  /**
   * last_reserve_out_serial_id serial ID of the last withdraw the auditor processed
   */
  uint64_t last_withdraw_serial_id;

  /**
   * last_deposit_serial_id serial ID of the last deposit the auditor processed
   */
  uint64_t last_deposit_serial_id;

  /**
   * last_melt_serial_id serial ID of the last refresh the auditor processed
   */
  uint64_t last_melt_serial_id;

  /**
   * last_prewire_serial_id serial ID of the last prewire transfer the auditor processed
   */
  uint64_t last_refund_serial_id;

  /**
   * last_prewire_serial_id serial ID of the last prewire transfer the auditor processed
   */
  uint64_t last_wire_out_serial_id;

};


/**
 * Handle for one session with the database.
 */
struct TALER_AUDITORDB_Session;


/**
 * @brief The plugin API, returned from the plugin's "init" function.
 * The argument given to "init" is simply a configuration handle.
 *
 * Functions starting with "get_" return one result, functions starting
 * with "select_" return multiple results via callbacks.
 */
struct TALER_AUDITORDB_Plugin
{

  /**
   * Closure for all callbacks.
   */
  void *cls;

  /**
   * Name of the library which generated this plugin.  Set by the
   * plugin loader.
   */
  char *library_name;

  /**
   * Get the thread-local database-handle.
   * Connect to the db if the connection does not exist yet.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param the database connection, or NULL on error
   */
  struct TALER_AUDITORDB_Session *
  (*get_session) (void *cls);


  /**
   * Drop the Taler tables.  This should only be used in testcases.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
   */
  int
  (*drop_tables) (void *cls);


  /**
   * Create the necessary tables if they are not present
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
   */
  int
  (*create_tables) (void *cls);


  /**
   * Start a transaction.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @return #GNUNET_OK on success
   */
  int
  (*start) (void *cls,
            struct TALER_AUDITORDB_Session *session);


  /**
   * Commit a transaction.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @return #GNUNET_OK on success, #GNUNET_NO if the transaction
   *         can be retried, #GNUNET_SYSERR on hard failures
   */
  int
  (*commit) (void *cls,
             struct TALER_AUDITORDB_Session *session);


  /**
   * Abort/rollback a transaction.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   */
  void
  (*rollback) (void *cls,
               struct TALER_AUDITORDB_Session *session);


  /**
   * Function called to perform "garbage collection" on the
   * database, expiring records we no longer require.
   *
   * @param cls closure
   * @return #GNUNET_OK on success,
   *         #GNUNET_SYSERR on DB errors
   */
  int
  (*gc) (void *cls);


  /**
   * Insert information about a denomination key and in particular
   * the properties (value, fees, expiration times) the coins signed
   * with this key have.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param issue issuing information with value, fees and other info about the denomination
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_denomination_info)(void *cls,
                              struct TALER_AUDITORDB_Session *session,
                              const struct TALER_DenominationKeyValidityPS *issue);


  /**
   * Get information about denomination keys of a particular exchange.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param cb function to call with the results
   * @param cb_cls closure for @a cb
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*select_denomination_info)(void *cls,
                              struct TALER_AUDITORDB_Session *session,
                              const struct TALER_MasterPublicKeyP *master_pub,
                              TALER_AUDITORDB_DenominationInfoDataCallback cb,
                              void *cb_cls);


  /**
   * Insert information about the auditor's progress with an exchange's
   * data.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param pp where is the auditor in processing
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_auditor_progress)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_AUDITORDB_ProgressPoint *pp);


  /**
   * Update information about the progress of the auditor.  There
   * must be an existing record for the exchange.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param pp where is the auditor in processing
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_auditor_progress)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_AUDITORDB_ProgressPoint *pp);


  /**
   * Get information about the progress of the auditor.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param[out] pp set to where the auditor is in processing
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure;
   *         #GNUNET_NO if we have no records for the @a master_pub
   */
  int
  (*get_auditor_progress)(void *cls,
                          struct TALER_AUDITORDB_Session *session,
                          const struct TALER_MasterPublicKeyP *master_pub,
                          struct TALER_AUDITORDB_ProgressPoint *pp);


  /**
   * Insert information about a reserve.  There must not be an
   * existing record for the reserve.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param reserve_pub public key of the reserve
   * @param master_pub master public key of the exchange
   * @param reserve_balance amount stored in the reserve
   * @param withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @param expiration_date expiration date of the reserve
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_reserve_info)(void *cls,
                         struct TALER_AUDITORDB_Session *session,
                         const struct TALER_ReservePublicKeyP *reserve_pub,
                         const struct TALER_MasterPublicKeyP *master_pub,
                         const struct TALER_Amount *reserve_balance,
                         const struct TALER_Amount *withdraw_fee_balance,
                         struct GNUNET_TIME_Absolute expiration_date);


  /**
   * Update information about a reserve.  Destructively updates an
   * existing record, which must already exist.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param reserve_pub public key of the reserve
   * @param master_pub master public key of the exchange
   * @param reserve_balance amount stored in the reserve
   * @param withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @param expiration_date expiration date of the reserve
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_reserve_info)(void *cls,
                         struct TALER_AUDITORDB_Session *session,
                         const struct TALER_ReservePublicKeyP *reserve_pub,
                         const struct TALER_MasterPublicKeyP *master_pub,
                         const struct TALER_Amount *reserve_balance,
                         const struct TALER_Amount *withdraw_fee_balance,
                         struct GNUNET_TIME_Absolute expiration_date);


  /**
   * Get information about a reserve.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param reserve_pub public key of the reserve
   * @param master_pub master public key of the exchange
   * @param[out] rowid which row did we get the information from
   * @param[out] reserve_balance amount stored in the reserve
   * @param[out] withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @param[out] expiration_date expiration date of the reserve
   * @return #GNUNET_OK on success; #GNUNET_NO if there is no known
   *         record about this reserve; #GNUNET_SYSERR on failure
   */
  int
  (*get_reserve_info)(void *cls,
                      struct TALER_AUDITORDB_Session *session,
                      const struct TALER_ReservePublicKeyP *reserve_pub,
                      const struct TALER_MasterPublicKeyP *master_pub,
                      uint64_t *rowid,
                      struct TALER_Amount *reserve_balance,
                      struct TALER_Amount *withdraw_fee_balance,
                      struct GNUNET_TIME_Absolute *expiration_date);


  /**
   * Delete information about a reserve.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param reserve_pub public key of the reserve
   * @param master_pub master public key of the exchange
   * @return #GNUNET_OK on success; #GNUNET_NO if there is no known
   *         record about this reserve; #GNUNET_SYSERR on failure
   */
  int
  (*del_reserve_info)(void *cls,
                      struct TALER_AUDITORDB_Session *session,
                      const struct TALER_ReservePublicKeyP *reserve_pub,
                      const struct TALER_MasterPublicKeyP *master_pub);


  /**
   * Insert information about all reserves.  There must not be an
   * existing record for the @a master_pub.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param reserve_balance amount stored in the reserve
   * @param withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_reserve_summary)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            const struct TALER_Amount *reserve_balance,
                            const struct TALER_Amount *withdraw_fee_balance);


  /**
   * Update information about all reserves.  Destructively updates an
   * existing record, which must already exist.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param reserve_balance amount stored in the reserve
   * @param withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_reserve_summary)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            const struct TALER_Amount *reserve_balance,
                            const struct TALER_Amount *withdraw_fee_balance);


  /**
   * Get summary information about all reserves.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param[out] reserve_balance amount stored in the reserve
   * @param[out] withdraw_fee_balance amount the exchange gained in withdraw fees
   *                             due to withdrawals from this reserve
   * @return #GNUNET_OK on success; #GNUNET_NO if there is no known
   *         record about this exchange; #GNUNET_SYSERR on failure
   */
  int
  (*get_reserve_summary)(void *cls,
                         struct TALER_AUDITORDB_Session *session,
                         const struct TALER_MasterPublicKeyP *master_pub,
                         struct TALER_Amount *reserve_balance,
                         struct TALER_Amount *withdraw_fee_balance);


  /**
   * Insert information about exchange's wire fee balance. There must not be an
   * existing record for the same @a master_pub.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param wire_fee_balance amount the exchange gained in wire fees
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_wire_fee_summary)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_Amount *wire_fee_balance);


  /**
   * Insert information about exchange's wire fee balance.  Destructively updates an
   * existing record, which must already exist.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param wire_fee_balance amount the exchange gained in wire fees
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_wire_fee_summary)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_Amount *wire_fee_balance);


  /**
   * Get summary information about an exchanges wire fee balance.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master public key of the exchange
   * @param[out] wire_fee_balance set amount the exchange gained in wire fees
   * @return #GNUNET_OK on success; #GNUNET_NO if there is no known
   *         record about this exchange; #GNUNET_SYSERR on failure
   */
  int
  (*get_wire_fee_summary)(void *cls,
                          struct TALER_AUDITORDB_Session *session,
                          const struct TALER_MasterPublicKeyP *master_pub,
                          struct TALER_Amount *wire_fee_balance);


  /**
   * Insert information about a denomination key's balances.  There
   * must not be an existing record for the denomination key.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param denom_pub_hash hash of the denomination public key
   * @param denom_balance value of coins outstanding with this denomination key
   * @param denom_risk value of coins issued with this denomination key
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_denomination_balance)(void *cls,
                                 struct TALER_AUDITORDB_Session *session,
                                 const struct GNUNET_HashCode *denom_pub_hash,
                                 const struct TALER_Amount *denom_balance,
                                 const struct TALER_Amount *denom_risk);


  /**
   * Update information about a denomination key's balances.  There
   * must be an existing record for the denomination key.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param denom_pub_hash hash of the denomination public key
   * @param denom_balance value of coins outstanding with this denomination key
   * @param denom_risk value of coins issued with this denomination key
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_denomination_balance)(void *cls,
                                 struct TALER_AUDITORDB_Session *session,
                                 const struct GNUNET_HashCode *denom_pub_hash,
                                 const struct TALER_Amount *denom_balance,
                                 const struct TALER_Amount *denom_risk);


  /**
   * Get information about a denomination key's balances.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param denom_pub_hash hash of the denomination public key
   * @param[out] denom_balance value of coins outstanding with this denomination key
   * @param[out] denom_risk value of coins issued with this denomination key
   * @return #GNUNET_OK on success; #GNUNET_NO if no record found, #GNUNET_SYSERR on failure
   */
  int
  (*get_denomination_balance)(void *cls,
                              struct TALER_AUDITORDB_Session *session,
                              const struct GNUNET_HashCode *denom_pub_hash,
                              struct TALER_Amount *denom_balance,
                              struct TALER_Amount *denom_risk);


  /**
   * Delete information about a denomination key's balances.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param denom_pub_hash hash of the denomination public key
   * @return #GNUNET_OK on success; #GNUNET_NO if no record found, #GNUNET_SYSERR on failure
   */
  int
  (*del_denomination_balance)(void *cls,
                              struct TALER_AUDITORDB_Session *session,
                              const struct GNUNET_HashCode *denom_pub_hash);


  /**
   * Insert information about an exchange's denomination balances.  There
   * must not be an existing record for the exchange.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param denom_balance value of coins outstanding with this denomination key
   * @param deposit_fee_balance total deposit fees collected for this DK
   * @param melt_fee_balance total melt fees collected for this DK
   * @param refund_fee_balance total refund fees collected for this DK
   * @param risk maximum risk exposure of the exchange
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_balance_summary)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            const struct TALER_Amount *denom_balance,
                            const struct TALER_Amount *deposit_fee_balance,
                            const struct TALER_Amount *melt_fee_balance,
                            const struct TALER_Amount *refund_fee_balance,
                            const struct TALER_Amount *risk);


  /**
   * Update information about an exchange's denomination balances.  There
   * must be an existing record for the exchange.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param denom_balance value of coins outstanding with this denomination key
   * @param deposit_fee_balance total deposit fees collected for this DK
   * @param melt_fee_balance total melt fees collected for this DK
   * @param refund_fee_balance total refund fees collected for this DK
   * @param risk maximum risk exposure of the exchange
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_balance_summary)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            const struct TALER_Amount *denom_balance,
                            const struct TALER_Amount *deposit_fee_balance,
                            const struct TALER_Amount *melt_fee_balance,
                            const struct TALER_Amount *refund_fee_balance,
                            const struct TALER_Amount *risk);


  /**
   * Get information about an exchange's denomination balances.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param[out] denom_balance value of coins outstanding with this denomination key
   * @param[out] deposit_fee_balance total deposit fees collected for this DK
   * @param[out] melt_fee_balance total melt fees collected for this DK
   * @param[out] refund_fee_balance total refund fees collected for this DK
   * @param[out] risk maximum risk exposure of the exchange
   * @return #GNUNET_OK on success; #GNUNET_NO if there is no entry
   *           for this @a master_pub; #GNUNET_SYSERR on failure
   */
  int
  (*get_balance_summary)(void *cls,
                         struct TALER_AUDITORDB_Session *session,
                         const struct TALER_MasterPublicKeyP *master_pub,
                         struct TALER_Amount *denom_balance,
                         struct TALER_Amount *deposit_fee_balance,
                         struct TALER_Amount *melt_fee_balance,
                         struct TALER_Amount *refund_fee_balance,
                         struct TALER_Amount *risk);


  /**
   * Insert information about an exchange's historic
   * revenue about a denomination key.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param denom_pub_hash hash of the denomination key
   * @param revenue_timestamp when did this profit get realized
   * @param revenue_balance what was the total profit made from
   *                        deposit fees, melting fees, refresh fees
   *                        and coins that were never returned?
     * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_historic_denom_revenue)(void *cls,
                                   struct TALER_AUDITORDB_Session *session,
                                   const struct TALER_MasterPublicKeyP *master_pub,
                                   const struct GNUNET_HashCode *denom_pub_hash,
                                   struct GNUNET_TIME_Absolute revenue_timestamp,
                                   const struct TALER_Amount *revenue_balance);


  /**
   * Obtain all of the historic denomination key revenue
   * of the given @a master_pub.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param cb function to call with the results
   * @param cb_cls closure for @a cb
   * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
   */
  int
  (*select_historic_denom_revenue)(void *cls,
                                   struct TALER_AUDITORDB_Session *session,
                                   const struct TALER_MasterPublicKeyP *master_pub,
                                   TALER_AUDITORDB_HistoricDenominationRevenueDataCallback cb,
                                   void *cb_cls);


  /**
   * Insert information about an exchange's historic
   * losses (from compromised denomination keys).
   *
   * Note yet used, need to implement exchange's bankrupcy
   * protocol (and tables!) first.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param denom_pub_hash hash of the denomination key
   * @param loss_timestamp when did this profit get realized
   * @param loss_balance what was the total loss
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_historic_losses)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            const struct GNUNET_HashCode *denom_pub_hash,
                            struct GNUNET_TIME_Absolute loss_timestamp,
                            const struct TALER_Amount *loss_balance);

  /**
   * Obtain all of the historic denomination key losses
   * of the given @a master_pub.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param cb function to call with the results
   * @param cb_cls closure for @a cb
   * @return #GNUNET_OK on success, #GNUNET_SYSERR on failure
   */
  int
  (*select_historic_losses)(void *cls,
                            struct TALER_AUDITORDB_Session *session,
                            const struct TALER_MasterPublicKeyP *master_pub,
                            TALER_AUDITORDB_HistoricLossesDataCallback cb,
                            void *cb_cls);


  /**
   * Insert information about an exchange's historic revenue from reserves.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param start_time beginning of aggregated time interval
   * @param end_time end of aggregated time interval
   * @param reserve_profits total profits made
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_historic_reserve_revenue)(void *cls,
                                     struct TALER_AUDITORDB_Session *session,
                                     const struct TALER_MasterPublicKeyP *master_pub,
                                     struct GNUNET_TIME_Absolute start_time,
                                     struct GNUNET_TIME_Absolute end_time,
                                     const struct TALER_Amount *reserve_profits);


  /**
   * Return information about an exchange's historic revenue from reserves.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param cb function to call with results
   * @param cb_cls closure for @a cb
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*select_historic_reserve_revenue)(void *cls,
                                     struct TALER_AUDITORDB_Session *session,
                                     const struct TALER_MasterPublicKeyP *master_pub,
                                     TALER_AUDITORDB_HistoricReserveRevenueDataCallback cb,
                                     void *cb_cls);



  /**
   * Insert information about the predicted exchange's bank
   * account balance.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param balance what the bank account balance of the exchange should show
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*insert_predicted_result)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_Amount *balance);


  /**
   * Update information about an exchange's predicted balance.  There
   * must be an existing record for the exchange.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param balance what the bank account balance of the exchange should show
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure
   */
  int
  (*update_predicted_result)(void *cls,
                             struct TALER_AUDITORDB_Session *session,
                             const struct TALER_MasterPublicKeyP *master_pub,
                             const struct TALER_Amount *balance);


  /**
   * Get an exchange's predicted balance.
   *
   * @param cls the @e cls of this struct with the plugin-specific state
   * @param session connection to use
   * @param master_pub master key of the exchange
   * @param[out] balance expected bank account balance of the exchange
   * @return #GNUNET_OK on success; #GNUNET_SYSERR on failure;
   *         #GNUNET_NO if we have no records for the @a master_pub
   */
  int
  (*get_predicted_balance)(void *cls,
                           struct TALER_AUDITORDB_Session *session,
                           const struct TALER_MasterPublicKeyP *master_pub,
                           struct TALER_Amount *balance);


};


#endif /* _TALER_AUDITOR_DB_H */