forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
Copy pathdarksend.cpp
2502 lines (2057 loc) · 96.9 KB
/
darksend.cpp
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
// Copyright (c) 2014-2016 The Dash Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "activemasternode.h"
#include "coincontrol.h"
#include "consensus/validation.h"
#include "darksend.h"
#include "init.h"
#include "instantx.h"
#include "masternode-payments.h"
#include "masternode-sync.h"
#include "masternodeman.h"
#include "script/sign.h"
#include "txmempool.h"
#include "util.h"
#include "utilmoneystr.h"
#include <boost/lexical_cast.hpp>
int nPrivateSendRounds = DEFAULT_PRIVATESEND_ROUNDS;
int nPrivateSendAmount = DEFAULT_PRIVATESEND_AMOUNT;
int nLiquidityProvider = DEFAULT_PRIVATESEND_LIQUIDITY;
bool fEnablePrivateSend = false;
bool fPrivateSendMultiSession = DEFAULT_PRIVATESEND_MULTISESSION;
CDarksendPool darkSendPool;
CDarkSendSigner darkSendSigner;
std::map<uint256, CDarksendBroadcastTx> mapDarksendBroadcastTxes;
std::vector<CAmount> vecPrivateSendDenominations;
void CDarksendPool::ProcessMessage(CNode* pfrom, std::string& strCommand, CDataStream& vRecv)
{
if(fLiteMode) return; // ignore all Dash related functionality
if(!masternodeSync.IsBlockchainSynced()) return;
if(strCommand == NetMsgType::DSACCEPT) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSACCEPT -- incompatible version! nVersion: %d\n", pfrom->nVersion);
PushStatus(pfrom, STATUS_REJECTED, ERR_VERSION);
return;
}
if(!fMasterNode) {
LogPrintf("DSACCEPT -- not a Masternode!\n");
PushStatus(pfrom, STATUS_REJECTED, ERR_NOT_A_MN);
return;
}
if(IsSessionReady()) {
// too many users in this session already, reject new ones
LogPrintf("DSACCEPT -- queue is already full!\n");
PushStatus(pfrom, STATUS_ACCEPTED, ERR_QUEUE_FULL);
return;
}
int nDenom;
CTransaction txCollateral;
vRecv >> nDenom >> txCollateral;
LogPrint("privatesend", "DSACCEPT -- nDenom %d (%s) txCollateral %s", nDenom, GetDenominationsToString(nDenom), txCollateral.ToString());
CMasternode* pmn = mnodeman.Find(activeMasternode.vin);
if(pmn == NULL) {
PushStatus(pfrom, STATUS_REJECTED, ERR_MN_LIST);
return;
}
if(vecSessionCollaterals.size() == 0 && pmn->nLastDsq != 0 &&
pmn->nLastDsq + mnodeman.CountEnabled(MIN_PRIVATESEND_PEER_PROTO_VERSION)/5 > mnodeman.nDsqCount)
{
LogPrintf("DSACCEPT -- last dsq too recent, must wait: addr=%s\n", pfrom->addr.ToString());
PushStatus(pfrom, STATUS_REJECTED, ERR_RECENT);
return;
}
PoolMessage nMessageID = MSG_NOERR;
bool fResult = nSessionID == 0 ? CreateNewSession(nDenom, txCollateral, nMessageID)
: AddUserToExistingSession(nDenom, txCollateral, nMessageID);
if(fResult) {
LogPrintf("DSACCEPT -- is compatible, please submit!\n");
PushStatus(pfrom, STATUS_ACCEPTED, nMessageID);
return;
} else {
LogPrintf("DSACCEPT -- not compatible with existing transactions!\n");
PushStatus(pfrom, STATUS_REJECTED, nMessageID);
return;
}
} else if(strCommand == NetMsgType::DSQUEUE) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrint("privatesend", "DSQUEUE -- incompatible version! nVersion: %d\n", pfrom->nVersion);
return;
}
CDarksendQueue dsq;
vRecv >> dsq;
{
LOCK(cs_darksend);
// process every dsq only once
BOOST_FOREACH(CDarksendQueue q, vecDarksendQueue) {
if(q == dsq) {
// LogPrint("privatesend", "DSQUEUE -- %s seen\n", dsq.ToString());
return;
}
}
}
LogPrint("privatesend", "DSQUEUE -- %s new\n", dsq.ToString());
if(dsq.IsExpired() || dsq.nTime > GetTime() + PRIVATESEND_QUEUE_TIMEOUT) return;
CMasternode* pmn = mnodeman.Find(dsq.vin);
if(pmn == NULL) return;
if(!dsq.CheckSignature(pmn->pubKeyMasternode)) {
// we probably have outdated info
mnodeman.AskForMN(pfrom, dsq.vin);
return;
}
// if the queue is ready, submit if we can
if(dsq.fReady) {
if(!pSubmittedToMasternode) return;
if((CNetAddr)pSubmittedToMasternode->addr != (CNetAddr)pmn->addr) {
LogPrintf("DSQUEUE -- message doesn't match current Masternode: pSubmittedToMasternode=%s, addr=%s\n", pSubmittedToMasternode->addr.ToString(), pmn->addr.ToString());
return;
}
if(nState == POOL_STATE_QUEUE) {
LogPrint("privatesend", "DSQUEUE -- PrivateSend queue (%s) is ready on masternode %s\n", dsq.ToString(), pmn->addr.ToString());
SubmitDenominate();
}
} else {
{
LOCK(cs_darksend);
BOOST_FOREACH(CDarksendQueue q, vecDarksendQueue) {
if(q.vin == dsq.vin) {
// no way same mn can send another "not yet ready" dsq this soon
LogPrint("privatesend", "DSQUEUE -- Masternode %s is sending WAY too many dsq messages\n", pmn->addr.ToString());
return;
}
}
}
int nThreshold = pmn->nLastDsq + mnodeman.CountEnabled(MIN_PRIVATESEND_PEER_PROTO_VERSION)/5;
LogPrint("privatesend", "DSQUEUE -- nLastDsq: %d threshold: %d nDsqCount: %d\n", pmn->nLastDsq, nThreshold, mnodeman.nDsqCount);
//don't allow a few nodes to dominate the queuing process
if(pmn->nLastDsq != 0 && nThreshold > mnodeman.nDsqCount) {
LogPrint("privatesend", "DSQUEUE -- Masternode %s is sending too many dsq messages\n", pmn->addr.ToString());
return;
}
mnodeman.nDsqCount++;
pmn->nLastDsq = mnodeman.nDsqCount;
pmn->fAllowMixingTx = true;
LogPrint("privatesend", "DSQUEUE -- new PrivateSend queue (%s) from masternode %s\n", dsq.ToString(), pmn->addr.ToString());
if(pSubmittedToMasternode && pSubmittedToMasternode->vin.prevout == dsq.vin.prevout) {
dsq.fTried = true;
}
vecDarksendQueue.push_back(dsq);
dsq.Relay();
}
} else if(strCommand == NetMsgType::DSVIN) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSVIN -- incompatible version! nVersion: %d\n", pfrom->nVersion);
PushStatus(pfrom, STATUS_REJECTED, ERR_VERSION);
return;
}
if(!fMasterNode) {
LogPrintf("DSVIN -- not a Masternode!\n");
PushStatus(pfrom, STATUS_REJECTED, ERR_NOT_A_MN);
return;
}
//do we have enough users in the current session?
if(!IsSessionReady()) {
LogPrintf("DSVIN -- session not complete!\n");
PushStatus(pfrom, STATUS_REJECTED, ERR_SESSION);
return;
}
CDarkSendEntry entry;
vRecv >> entry;
LogPrint("privatesend", "DSVIN -- txCollateral %s", entry.txCollateral.ToString());
//do we have the same denominations as the current session?
if(!IsOutputsCompatibleWithSessionDenom(entry.vecTxDSOut)) {
LogPrintf("DSVIN -- not compatible with existing transactions!\n");
PushStatus(pfrom, STATUS_REJECTED, ERR_EXISTING_TX);
return;
}
//check it like a transaction
{
CAmount nValueIn = 0;
CAmount nValueOut = 0;
CMutableTransaction tx;
BOOST_FOREACH(const CTxOut txout, entry.vecTxDSOut) {
nValueOut += txout.nValue;
tx.vout.push_back(txout);
if(txout.scriptPubKey.size() != 25) {
LogPrintf("DSVIN -- non-standard pubkey detected! scriptPubKey=%s\n", ScriptToAsmStr(txout.scriptPubKey));
PushStatus(pfrom, STATUS_REJECTED, ERR_NON_STANDARD_PUBKEY);
return;
}
if(!txout.scriptPubKey.IsNormalPaymentScript()) {
LogPrintf("DSVIN -- invalid script! scriptPubKey=%s\n", ScriptToAsmStr(txout.scriptPubKey));
PushStatus(pfrom, STATUS_REJECTED, ERR_INVALID_SCRIPT);
return;
}
}
BOOST_FOREACH(const CTxIn txin, entry.vecTxDSIn) {
tx.vin.push_back(txin);
LogPrint("privatesend", "DSVIN -- txin=%s\n", txin.ToString());
CTransaction txPrev;
uint256 hash;
if(GetTransaction(txin.prevout.hash, txPrev, Params().GetConsensus(), hash, true)) {
if(txPrev.vout.size() > txin.prevout.n)
nValueIn += txPrev.vout[txin.prevout.n].nValue;
} else {
LogPrintf("DSVIN -- missing input! tx=%s", tx.ToString());
PushStatus(pfrom, STATUS_REJECTED, ERR_MISSING_TX);
return;
}
}
if(nValueIn > PRIVATESEND_POOL_MAX) {
LogPrintf("DSVIN -- more than PrivateSend pool max! nValueIn: %lld, tx=%s", nValueIn, tx.ToString());
PushStatus(pfrom, STATUS_REJECTED, ERR_MAXIMUM);
return;
}
// Allow lowest denom (at max) as a a fee. Normally shouldn't happen though.
// TODO: Or do not allow fees at all?
if(nValueIn - nValueOut > vecPrivateSendDenominations.back()) {
LogPrintf("DSVIN -- fees are too high! fees: %lld, tx=%s", nValueIn - nValueOut, tx.ToString());
PushStatus(pfrom, STATUS_REJECTED, ERR_FEES);
return;
}
{
LOCK(cs_main);
CValidationState validationState;
mempool.PrioritiseTransaction(tx.GetHash(), tx.GetHash().ToString(), 1000, 0.1*COIN);
if(!AcceptToMemoryPool(mempool, validationState, CTransaction(tx), false, NULL, false, true, true)) {
LogPrintf("DSVIN -- transaction not valid! tx=%s", tx.ToString());
PushStatus(pfrom, STATUS_REJECTED, ERR_INVALID_TX);
return;
}
}
}
PoolMessage nMessageID = MSG_NOERR;
if(AddEntry(entry, nMessageID)) {
PushStatus(pfrom, STATUS_ACCEPTED, nMessageID);
CheckPool();
RelayStatus(STATUS_ACCEPTED);
} else {
PushStatus(pfrom, STATUS_REJECTED, nMessageID);
SetNull();
}
} else if(strCommand == NetMsgType::DSSTATUSUPDATE) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSSTATUSUPDATE -- incompatible version! nVersion: %d\n", pfrom->nVersion);
return;
}
if(fMasterNode) {
// LogPrintf("DSSTATUSUPDATE -- Can't run on a Masternode!\n");
return;
}
if(!pSubmittedToMasternode) return;
if((CNetAddr)pSubmittedToMasternode->addr != (CNetAddr)pfrom->addr) {
//LogPrintf("DSSTATUSUPDATE -- message doesn't match current Masternode: pSubmittedToMasternode %s addr %s\n", pSubmittedToMasternode->addr.ToString(), pfrom->addr.ToString());
return;
}
int nMsgSessionID;
int nMsgState;
int nMsgEntriesCount;
int nMsgStatusUpdate;
int nMsgMessageID;
vRecv >> nMsgSessionID >> nMsgState >> nMsgEntriesCount >> nMsgStatusUpdate >> nMsgMessageID;
LogPrint("privatesend", "DSSTATUSUPDATE -- nMsgSessionID %d nMsgState: %d nEntriesCount: %d nMsgStatusUpdate: %d nMsgMessageID %d\n",
nMsgSessionID, nMsgState, nEntriesCount, nMsgStatusUpdate, nMsgMessageID);
if(nMsgState < POOL_STATE_MIN || nMsgState > POOL_STATE_MAX) {
LogPrint("privatesend", "DSSTATUSUPDATE -- nMsgState is out of bounds: %d\n", nMsgState);
return;
}
if(nMsgStatusUpdate < STATUS_REJECTED || nMsgStatusUpdate > STATUS_ACCEPTED) {
LogPrint("privatesend", "DSSTATUSUPDATE -- nMsgStatusUpdate is out of bounds: %d\n", nMsgStatusUpdate);
return;
}
if(nMsgMessageID < MSG_POOL_MIN || nMsgMessageID > MSG_POOL_MAX) {
LogPrint("privatesend", "DSSTATUSUPDATE -- nMsgMessageID is out of bounds: %d\n", nMsgMessageID);
if(pfrom->nVersion < 70203) nMsgMessageID = MSG_NOERR;
return;
}
LogPrint("privatesend", "DSSTATUSUPDATE -- GetMessageByID: %s\n", GetMessageByID(PoolMessage(nMsgMessageID)));
if(!CheckPoolStateUpdate(PoolState(nMsgState), nMsgEntriesCount, PoolStatusUpdate(nMsgStatusUpdate), PoolMessage(nMsgMessageID), nMsgSessionID)) {
LogPrint("privatesend", "DSSTATUSUPDATE -- CheckPoolStateUpdate failed\n");
}
} else if(strCommand == NetMsgType::DSSIGNFINALTX) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSSIGNFINALTX -- incompatible version! nVersion: %d\n", pfrom->nVersion);
return;
}
if(!fMasterNode) {
LogPrintf("DSSIGNFINALTX -- not a Masternode!\n");
return;
}
std::vector<CTxIn> vecTxIn;
vRecv >> vecTxIn;
LogPrint("privatesend", "DSSIGNFINALTX -- vecTxIn.size() %s\n", vecTxIn.size());
int nTxInIndex = 0;
int nTxInsCount = (int)vecTxIn.size();
BOOST_FOREACH(const CTxIn txin, vecTxIn) {
nTxInIndex++;
if(!AddScriptSig(txin)) {
LogPrint("privatesend", "DSSIGNFINALTX -- AddScriptSig() failed at %d/%d, session: %d\n", nTxInIndex, nTxInsCount, nSessionID);
RelayStatus(STATUS_REJECTED);
return;
}
LogPrint("privatesend", "DSSIGNFINALTX -- AddScriptSig() %d/%d success\n", nTxInIndex, nTxInsCount);
}
// all is good
CheckPool();
} else if(strCommand == NetMsgType::DSFINALTX) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSFINALTX -- incompatible version! nVersion: %d\n", pfrom->nVersion);
return;
}
if(fMasterNode) {
// LogPrintf("DSFINALTX -- Can't run on a Masternode!\n");
return;
}
if(!pSubmittedToMasternode) return;
if((CNetAddr)pSubmittedToMasternode->addr != (CNetAddr)pfrom->addr) {
//LogPrintf("DSFINALTX -- message doesn't match current Masternode: pSubmittedToMasternode %s addr %s\n", pSubmittedToMasternode->addr.ToString(), pfrom->addr.ToString());
return;
}
int nMsgSessionID;
CTransaction txNew;
vRecv >> nMsgSessionID >> txNew;
if(nSessionID != nMsgSessionID) {
LogPrint("privatesend", "DSFINALTX -- message doesn't match current PrivateSend session: nSessionID: %d nMsgSessionID: %d\n", nSessionID, nMsgSessionID);
return;
}
LogPrint("privatesend", "DSFINALTX -- txNew %s", txNew.ToString());
//check to see if input is spent already? (and probably not confirmed)
SignFinalTransaction(txNew, pfrom);
} else if(strCommand == NetMsgType::DSCOMPLETE) {
if(pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
LogPrintf("DSCOMPLETE -- incompatible version! nVersion: %d\n", pfrom->nVersion);
return;
}
if(fMasterNode) {
// LogPrintf("DSCOMPLETE -- Can't run on a Masternode!\n");
return;
}
if(!pSubmittedToMasternode) return;
if((CNetAddr)pSubmittedToMasternode->addr != (CNetAddr)pfrom->addr) {
LogPrint("privatesend", "DSCOMPLETE -- message doesn't match current Masternode: pSubmittedToMasternode=%s addr=%s\n", pSubmittedToMasternode->addr.ToString(), pfrom->addr.ToString());
return;
}
int nMsgSessionID;
int nMsgMessageID;
vRecv >> nMsgSessionID >> nMsgMessageID;
if(nMsgMessageID < MSG_POOL_MIN || nMsgMessageID > MSG_POOL_MAX) {
LogPrint("privatesend", "DSCOMPLETE -- nMsgMessageID is out of bounds: %d\n", nMsgMessageID);
return;
}
if(nSessionID != nMsgSessionID) {
LogPrint("privatesend", "DSCOMPLETE -- message doesn't match current PrivateSend session: nSessionID: %d nMsgSessionID: %d\n", darkSendPool.nSessionID, nMsgSessionID);
return;
}
LogPrint("privatesend", "DSCOMPLETE -- nMsgSessionID %d nMsgMessageID %d (%s)\n", nMsgSessionID, nMsgMessageID, GetMessageByID(PoolMessage(nMsgMessageID)));
CompletedTransaction(PoolMessage(nMsgMessageID));
}
}
void CDarksendPool::InitDenominations()
{
vecPrivateSendDenominations.clear();
/* Denominations
A note about convertability. Within mixing pools, each denomination
is convertable to another.
For example:
1DRK+1000 == (.1DRK+100)*10
10DRK+10000 == (1DRK+1000)*10
*/
vecPrivateSendDenominations.push_back( (100 * COIN)+100000 );
vecPrivateSendDenominations.push_back( (10 * COIN)+10000 );
vecPrivateSendDenominations.push_back( (1 * COIN)+1000 );
vecPrivateSendDenominations.push_back( (.1 * COIN)+100 );
/* Disabled till we need them
vecPrivateSendDenominations.push_back( (.01 * COIN)+10 );
vecPrivateSendDenominations.push_back( (.001 * COIN)+1 );
*/
}
void CDarksendPool::ResetPool()
{
nCachedLastSuccessBlock = 0;
txMyCollateral = CMutableTransaction();
vecMasternodesUsed.clear();
UnlockCoins();
SetNull();
}
void CDarksendPool::SetNull()
{
// MN side
vecSessionCollaterals.clear();
// Client side
nEntriesCount = 0;
fLastEntryAccepted = false;
pSubmittedToMasternode = NULL;
// Both sides
nState = POOL_STATE_IDLE;
nSessionID = 0;
nSessionDenom = 0;
vecEntries.clear();
finalMutableTransaction.vin.clear();
finalMutableTransaction.vout.clear();
nTimeLastSuccessfulStep = GetTimeMillis();
}
//
// Unlock coins after mixing fails or succeeds
//
void CDarksendPool::UnlockCoins()
{
while(true) {
TRY_LOCK(pwalletMain->cs_wallet, lockWallet);
if(!lockWallet) {MilliSleep(50); continue;}
BOOST_FOREACH(COutPoint outpoint, vecOutPointLocked)
pwalletMain->UnlockCoin(outpoint);
break;
}
vecOutPointLocked.clear();
}
std::string CDarksendPool::GetStateString() const
{
switch(nState) {
case POOL_STATE_IDLE: return "IDLE";
case POOL_STATE_QUEUE: return "QUEUE";
case POOL_STATE_ACCEPTING_ENTRIES: return "ACCEPTING_ENTRIES";
case POOL_STATE_SIGNING: return "SIGNING";
case POOL_STATE_ERROR: return "ERROR";
case POOL_STATE_SUCCESS: return "SUCCESS";
default: return "UNKNOWN";
}
}
std::string CDarksendPool::GetStatus()
{
static int nStatusMessageProgress = 0;
nStatusMessageProgress += 10;
std::string strSuffix = "";
if((pCurrentBlockIndex && pCurrentBlockIndex->nHeight - nCachedLastSuccessBlock < nMinBlockSpacing) || !masternodeSync.IsBlockchainSynced())
return strAutoDenomResult;
switch(nState) {
case POOL_STATE_IDLE:
return _("PrivateSend is idle.");
case POOL_STATE_QUEUE:
if( nStatusMessageProgress % 70 <= 30) strSuffix = ".";
else if(nStatusMessageProgress % 70 <= 50) strSuffix = "..";
else if(nStatusMessageProgress % 70 <= 70) strSuffix = "...";
return strprintf(_("Submitted to masternode, waiting in queue %s"), strSuffix);;
case POOL_STATE_ACCEPTING_ENTRIES:
if(nEntriesCount == 0) {
nStatusMessageProgress = 0;
return strAutoDenomResult;
} else if(fLastEntryAccepted) {
if(nStatusMessageProgress % 10 > 8) {
fLastEntryAccepted = false;
nStatusMessageProgress = 0;
}
return _("PrivateSend request complete:") + " " + _("Your transaction was accepted into the pool!");
} else {
if( nStatusMessageProgress % 70 <= 40) return strprintf(_("Submitted following entries to masternode: %u / %d"), nEntriesCount, GetMaxPoolTransactions());
else if(nStatusMessageProgress % 70 <= 50) strSuffix = ".";
else if(nStatusMessageProgress % 70 <= 60) strSuffix = "..";
else if(nStatusMessageProgress % 70 <= 70) strSuffix = "...";
return strprintf(_("Submitted to masternode, waiting for more entries ( %u / %d ) %s"), nEntriesCount, GetMaxPoolTransactions(), strSuffix);
}
case POOL_STATE_SIGNING:
if( nStatusMessageProgress % 70 <= 40) return _("Found enough users, signing ...");
else if(nStatusMessageProgress % 70 <= 50) strSuffix = ".";
else if(nStatusMessageProgress % 70 <= 60) strSuffix = "..";
else if(nStatusMessageProgress % 70 <= 70) strSuffix = "...";
return strprintf(_("Found enough users, signing ( waiting %s )"), strSuffix);
case POOL_STATE_ERROR:
return _("PrivateSend request incomplete:") + " " + strLastMessage + " " + _("Will retry...");
case POOL_STATE_SUCCESS:
return _("PrivateSend request complete:") + " " + strLastMessage;
default:
return strprintf(_("Unknown state: id = %u"), nState);
}
}
//
// Check the mixing progress and send client updates if a Masternode
//
void CDarksendPool::CheckPool()
{
if(fMasterNode) {
LogPrint("privatesend", "CDarksendPool::CheckPool -- entries count %lu\n", GetEntriesCount());
// If entries are full, create finalized transaction
if(nState == POOL_STATE_ACCEPTING_ENTRIES && GetEntriesCount() >= GetMaxPoolTransactions()) {
LogPrint("privatesend", "CDarksendPool::CheckPool -- FINALIZE TRANSACTIONS\n");
CreateFinalTransaction();
return;
}
// If we have all of the signatures, try to compile the transaction
if(nState == POOL_STATE_SIGNING && IsSignaturesComplete()) {
LogPrint("privatesend", "CDarksendPool::CheckPool -- SIGNING\n");
CommitFinalTransaction();
return;
}
}
// reset if we're here for 10 seconds
if((nState == POOL_STATE_ERROR || nState == POOL_STATE_SUCCESS) && GetTimeMillis() - nTimeLastSuccessfulStep >= 10000) {
LogPrint("privatesend", "CDarksendPool::CheckPool -- timeout, RESETTING\n");
UnlockCoins();
SetNull();
}
}
void CDarksendPool::CreateFinalTransaction()
{
LogPrint("privatesend", "CDarksendPool::CreateFinalTransaction -- FINALIZE TRANSACTIONS\n");
CMutableTransaction txNew;
// make our new transaction
for(int i = 0; i < GetEntriesCount(); i++) {
BOOST_FOREACH(const CTxDSOut& txdsout, vecEntries[i].vecTxDSOut)
txNew.vout.push_back(txdsout);
BOOST_FOREACH(const CTxDSIn& txdsin, vecEntries[i].vecTxDSIn)
txNew.vin.push_back(txdsin);
}
// BIP69 https://github.com/kristovatlas/bips/blob/master/bip-0069.mediawiki
sort(txNew.vin.begin(), txNew.vin.end());
sort(txNew.vout.begin(), txNew.vout.end());
finalMutableTransaction = txNew;
LogPrint("privatesend", "CDarksendPool::CreateFinalTransaction -- finalMutableTransaction=%s", txNew.ToString());
// request signatures from clients
RelayFinalTransaction(finalMutableTransaction);
SetState(POOL_STATE_SIGNING);
}
void CDarksendPool::CommitFinalTransaction()
{
if(!fMasterNode) return; // check and relay final tx only on masternode
CTransaction finalTransaction = CTransaction(finalMutableTransaction);
uint256 hashTx = finalTransaction.GetHash();
LogPrint("privatesend", "CDarksendPool::CommitFinalTransaction -- finalTransaction=%s", finalTransaction.ToString());
{
// See if the transaction is valid
TRY_LOCK(cs_main, lockMain);
CValidationState validationState;
mempool.PrioritiseTransaction(hashTx, hashTx.ToString(), 1000, 0.1*COIN);
if(!lockMain || !AcceptToMemoryPool(mempool, validationState, finalTransaction, false, NULL, false, true, true))
{
LogPrintf("CDarksendPool::CommitFinalTransaction -- AcceptToMemoryPool() error: Transaction not valid\n");
SetNull();
// not much we can do in this case, just notify clients
RelayCompletedTransaction(ERR_INVALID_TX);
return;
}
}
LogPrintf("CDarksendPool::CommitFinalTransaction -- CREATING DSTX\n");
// create and sign masternode dstx transaction
if(!mapDarksendBroadcastTxes.count(hashTx)) {
CDarksendBroadcastTx dstx(finalTransaction, activeMasternode.vin, GetAdjustedTime());
dstx.Sign();
mapDarksendBroadcastTxes.insert(std::make_pair(hashTx, dstx));
}
LogPrintf("CDarksendPool::CommitFinalTransaction -- TRANSMITTING DSTX\n");
CInv inv(MSG_DSTX, hashTx);
RelayInv(inv);
// Tell the clients it was successful
RelayCompletedTransaction(MSG_SUCCESS);
// Randomly charge clients
ChargeRandomFees();
// Reset
LogPrint("privatesend", "CDarksendPool::CommitFinalTransaction -- COMPLETED -- RESETTING\n");
SetNull();
}
//
// Charge clients a fee if they're abusive
//
// Why bother? PrivateSend uses collateral to ensure abuse to the process is kept to a minimum.
// The submission and signing stages are completely separate. In the cases where
// a client submits a transaction then refused to sign, there must be a cost. Otherwise they
// would be able to do this over and over again and bring the mixing to a hault.
//
// How does this work? Messages to Masternodes come in via NetMsgType::DSVIN, these require a valid collateral
// transaction for the client to be able to enter the pool. This transaction is kept by the Masternode
// until the transaction is either complete or fails.
//
void CDarksendPool::ChargeFees()
{
if(!fMasterNode) return;
//we don't need to charge collateral for every offence.
if(GetRandInt(100) > 33) return;
std::vector<CTransaction> vecOffendersCollaterals;
if(nState == POOL_STATE_ACCEPTING_ENTRIES) {
BOOST_FOREACH(const CTransaction& txCollateral, vecSessionCollaterals) {
bool fFound = false;
BOOST_FOREACH(const CDarkSendEntry& entry, vecEntries)
if(entry.txCollateral == txCollateral)
fFound = true;
// This queue entry didn't send us the promised transaction
if(!fFound) {
LogPrintf("CDarksendPool::ChargeFees -- found uncooperative node (didn't send transaction), found offence\n");
vecOffendersCollaterals.push_back(txCollateral);
}
}
}
if(nState == POOL_STATE_SIGNING) {
// who didn't sign?
BOOST_FOREACH(const CDarkSendEntry entry, vecEntries) {
BOOST_FOREACH(const CTxDSIn txdsin, entry.vecTxDSIn) {
if(!txdsin.fHasSig) {
LogPrintf("CDarksendPool::ChargeFees -- found uncooperative node (didn't sign), found offence\n");
vecOffendersCollaterals.push_back(entry.txCollateral);
}
}
}
}
// no offences found
if(vecOffendersCollaterals.empty()) return;
//mostly offending? Charge sometimes
if((int)vecOffendersCollaterals.size() >= Params().PoolMaxTransactions() - 1 && GetRandInt(100) > 33) return;
//everyone is an offender? That's not right
if((int)vecOffendersCollaterals.size() >= Params().PoolMaxTransactions()) return;
//charge one of the offenders randomly
std::random_shuffle(vecOffendersCollaterals.begin(), vecOffendersCollaterals.end());
if(nState == POOL_STATE_ACCEPTING_ENTRIES || nState == POOL_STATE_SIGNING) {
LogPrintf("CDarksendPool::ChargeFees -- found uncooperative node (didn't %s transaction), charging fees: %s\n",
(nState == POOL_STATE_SIGNING) ? "sign" : "send", vecOffendersCollaterals[0].ToString());
LOCK(cs_main);
CValidationState state;
bool fMissingInputs;
if(!AcceptToMemoryPool(mempool, state, vecOffendersCollaterals[0], false, &fMissingInputs, false, true)) {
// should never really happen
LogPrintf("CDarksendPool::ChargeFees -- ERROR: AcceptToMemoryPool failed!\n");
} else {
RelayTransaction(vecOffendersCollaterals[0]);
}
}
}
/*
Charge the collateral randomly.
Mixing is completely free, to pay miners we randomly pay the collateral of users.
Collateral Fee Charges:
Being that mixing has "no fees" we need to have some kind of cost associated
with using it to stop abuse. Otherwise it could serve as an attack vector and
allow endless transaction that would bloat Dash and make it unusable. To
stop these kinds of attacks 1 in 10 successful transactions are charged. This
adds up to a cost of 0.001DRK per transaction on average.
*/
void CDarksendPool::ChargeRandomFees()
{
if(!fMasterNode) return;
LOCK(cs_main);
BOOST_FOREACH(const CTransaction& txCollateral, vecSessionCollaterals) {
if(GetRandInt(100) > 10) return;
LogPrintf("CDarksendPool::ChargeRandomFees -- charging random fees, txCollateral=%s", txCollateral.ToString());
CValidationState state;
bool fMissingInputs;
if(!AcceptToMemoryPool(mempool, state, txCollateral, false, &fMissingInputs, false, true)) {
// should never really happen
LogPrintf("CDarksendPool::ChargeRandomFees -- ERROR: AcceptToMemoryPool failed!\n");
} else {
RelayTransaction(txCollateral);
}
}
}
//
// Check for various timeouts (queue objects, mixing, etc)
//
void CDarksendPool::CheckTimeout()
{
{
LOCK(cs_darksend);
// check mixing queue objects for timeouts
std::vector<CDarksendQueue>::iterator it = vecDarksendQueue.begin();
while(it != vecDarksendQueue.end()) {
if((*it).IsExpired()) {
LogPrint("privatesend", "CDarksendPool::CheckTimeout -- Removing expired queue (%s)\n", (*it).ToString());
it = vecDarksendQueue.erase(it);
} else ++it;
}
}
if(!fEnablePrivateSend && !fMasterNode) return;
// catching hanging sessions
if(!fMasterNode) {
switch(nState) {
case POOL_STATE_ERROR:
LogPrint("privatesend", "CDarksendPool::CheckTimeout -- Pool error -- Running CheckPool\n");
CheckPool();
break;
case POOL_STATE_SUCCESS:
LogPrint("privatesend", "CDarksendPool::CheckTimeout -- Pool success -- Running CheckPool\n");
CheckPool();
break;
default:
break;
}
}
int nLagTime = fMasterNode ? 0 : 10000; // if we're the client, give the server a few extra seconds before resetting.
int nTimeout = (nState == POOL_STATE_SIGNING) ? PRIVATESEND_SIGNING_TIMEOUT : PRIVATESEND_QUEUE_TIMEOUT;
bool fTimeout = GetTimeMillis() - nTimeLastSuccessfulStep >= nTimeout*1000 + nLagTime;
if(nState != POOL_STATE_IDLE && fTimeout) {
LogPrint("privatesend", "CDarksendPool::CheckTimeout -- %s timed out (%ds) -- restting\n",
(nState == POOL_STATE_SIGNING) ? "Signing" : "Session", nTimeout);
ChargeFees();
UnlockCoins();
SetNull();
SetState(POOL_STATE_ERROR);
strLastMessage = _("Session timed out.");
}
}
/*
Check to see if we're ready for submissions from clients
After receiving multiple dsa messages, the queue will switch to "accepting entries"
which is the active state right before merging the transaction
*/
void CDarksendPool::CheckForCompleteQueue()
{
if(!fEnablePrivateSend && !fMasterNode) return;
if(nState == POOL_STATE_QUEUE && IsSessionReady()) {
SetState(POOL_STATE_ACCEPTING_ENTRIES);
CDarksendQueue dsq(nSessionDenom, activeMasternode.vin, GetTime(), true);
LogPrint("privatesend", "CDarksendPool::CheckForCompleteQueue -- queue is ready, signing and relaying (%s)\n", dsq.ToString());
dsq.Sign();
dsq.Relay();
}
}
// Check to make sure a given input matches an input in the pool and its scriptSig is valid
bool CDarksendPool::IsInputScriptSigValid(const CTxIn& txin)
{
CMutableTransaction txNew;
txNew.vin.clear();
txNew.vout.clear();
int i = 0;
int nTxInIndex = -1;
CScript sigPubKey = CScript();
BOOST_FOREACH(CDarkSendEntry& entry, vecEntries) {
BOOST_FOREACH(const CTxDSOut& txdsout, entry.vecTxDSOut)
txNew.vout.push_back(txdsout);
BOOST_FOREACH(const CTxDSIn& txdsin, entry.vecTxDSIn) {
txNew.vin.push_back(txdsin);
if(txdsin.prevout == txin.prevout) {
nTxInIndex = i;
sigPubKey = txdsin.prevPubKey;
}
i++;
}
}
if(nTxInIndex >= 0) { //might have to do this one input at a time?
txNew.vin[nTxInIndex].scriptSig = txin.scriptSig;
LogPrint("privatesend", "CDarksendPool::IsInputScriptSigValid -- verifying scriptSig %s\n", ScriptToAsmStr(txin.scriptSig).substr(0,24));
if(!VerifyScript(txNew.vin[nTxInIndex].scriptSig, sigPubKey, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, MutableTransactionSignatureChecker(&txNew, nTxInIndex))) {
LogPrint("privatesend", "CDarksendPool::IsInputScriptSigValid -- VerifyScript() failed on input %d\n", nTxInIndex);
return false;
}
} else {
LogPrint("privatesend", "CDarksendPool::IsInputScriptSigValid -- Failed to find matching input in pool, %s\n", txin.ToString());
return false;
}
LogPrint("privatesend", "CDarksendPool::IsInputScriptSigValid -- Successfully validated input and scriptSig\n");
return true;
}
// check to make sure the collateral provided by the client is valid
bool CDarksendPool::IsCollateralValid(const CTransaction& txCollateral)
{
if(txCollateral.vout.empty()) return false;
if(txCollateral.nLockTime != 0) return false;
CAmount nValueIn = 0;
CAmount nValueOut = 0;
bool fMissingTx = false;
BOOST_FOREACH(const CTxOut txout, txCollateral.vout) {
nValueOut += txout.nValue;
if(!txout.scriptPubKey.IsNormalPaymentScript()) {
LogPrintf ("CDarksendPool::IsCollateralValid -- Invalid Script, txCollateral=%s", txCollateral.ToString());
return false;
}
}
BOOST_FOREACH(const CTxIn txin, txCollateral.vin) {
CTransaction txPrev;
uint256 hash;
if(GetTransaction(txin.prevout.hash, txPrev, Params().GetConsensus(), hash, true)) {
if(txPrev.vout.size() > txin.prevout.n)
nValueIn += txPrev.vout[txin.prevout.n].nValue;
} else {
fMissingTx = true;
}
}
if(fMissingTx) {
LogPrint("privatesend", "CDarksendPool::IsCollateralValid -- Unknown inputs in collateral transaction, txCollateral=%s", txCollateral.ToString());
return false;
}
//collateral transactions are required to pay out PRIVATESEND_COLLATERAL as a fee to the miners
if(nValueIn - nValueOut < PRIVATESEND_COLLATERAL) {
LogPrint("privatesend", "CDarksendPool::IsCollateralValid -- did not include enough fees in transaction: fees: %d, txCollateral=%s", nValueOut - nValueIn, txCollateral.ToString());
return false;
}
LogPrint("privatesend", "CDarksendPool::IsCollateralValid -- %s", txCollateral.ToString());
{
LOCK(cs_main);
CValidationState validationState;
if(!AcceptToMemoryPool(mempool, validationState, txCollateral, false, NULL, false, true, true)) {
LogPrint("privatesend", "CDarksendPool::IsCollateralValid -- didn't pass AcceptToMemoryPool()\n");
return false;
}
}
return true;
}
//
// Add a clients transaction to the pool
//
bool CDarksendPool::AddEntry(const CDarkSendEntry& entryNew, PoolMessage& nMessageIDRet)
{
if(!fMasterNode) return false;
BOOST_FOREACH(CTxIn txin, entryNew.vecTxDSIn) {
if(txin.prevout.IsNull()) {
LogPrint("privatesend", "CDarksendPool::AddEntry -- input not valid!\n");
nMessageIDRet = ERR_INVALID_INPUT;
return false;
}
}
if(!IsCollateralValid(entryNew.txCollateral)) {
LogPrint("privatesend", "CDarksendPool::AddEntry -- collateral not valid!\n");
nMessageIDRet = ERR_INVALID_COLLATERAL;
return false;
}
if(GetEntriesCount() >= GetMaxPoolTransactions()) {
LogPrint("privatesend", "CDarksendPool::AddEntry -- entries is full!\n");
nMessageIDRet = ERR_ENTRIES_FULL;
return false;
}
BOOST_FOREACH(CTxIn txin, entryNew.vecTxDSIn) {
LogPrint("privatesend", "looking for txin -- %s\n", txin.ToString());
BOOST_FOREACH(const CDarkSendEntry& entry, vecEntries) {
BOOST_FOREACH(const CTxDSIn& txdsin, entry.vecTxDSIn) {
if(txdsin.prevout == txin.prevout) {
LogPrint("privatesend", "CDarksendPool::AddEntry -- found in txin\n");
nMessageIDRet = ERR_ALREADY_HAVE;
return false;
}
}
}
}
vecEntries.push_back(entryNew);
LogPrint("privatesend", "CDarksendPool::AddEntry -- adding entry\n");
nMessageIDRet = MSG_ENTRIES_ADDED;
nTimeLastSuccessfulStep = GetTimeMillis();
return true;
}
bool CDarksendPool::AddScriptSig(const CTxIn& txinNew)
{
LogPrint("privatesend", "CDarksendPool::AddScriptSig -- scriptSig=%s\n", ScriptToAsmStr(txinNew.scriptSig).substr(0,24));