forked from bitcoin/bitcoin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
wallet.cpp
4631 lines (4029 loc) · 182 KB
/
wallet.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) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <wallet/wallet.h>
#include <bitcoin-build-config.h> // IWYU pragma: keep
#include <addresstype.h>
#include <blockfilter.h>
#include <chain.h>
#include <coins.h>
#include <common/args.h>
#include <common/messages.h>
#include <common/settings.h>
#include <common/signmessage.h>
#include <common/system.h>
#include <consensus/amount.h>
#include <consensus/consensus.h>
#include <consensus/validation.h>
#include <external_signer.h>
#include <interfaces/chain.h>
#include <interfaces/handler.h>
#include <interfaces/wallet.h>
#include <kernel/chain.h>
#include <kernel/mempool_removal_reason.h>
#include <key.h>
#include <key_io.h>
#include <logging.h>
#include <node/types.h>
#include <outputtype.h>
#include <policy/feerate.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <psbt.h>
#include <pubkey.h>
#include <random.h>
#include <script/descriptor.h>
#include <script/interpreter.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <script/solver.h>
#include <serialize.h>
#include <span.h>
#include <streams.h>
#include <support/allocators/secure.h>
#include <support/allocators/zeroafterfree.h>
#include <support/cleanse.h>
#include <sync.h>
#include <tinyformat.h>
#include <uint256.h>
#include <univalue.h>
#include <util/check.h>
#include <util/fs.h>
#include <util/fs_helpers.h>
#include <util/moneystr.h>
#include <util/result.h>
#include <util/string.h>
#include <util/time.h>
#include <util/translation.h>
#include <wallet/coincontrol.h>
#include <wallet/context.h>
#include <wallet/crypter.h>
#include <wallet/db.h>
#include <wallet/external_signer_scriptpubkeyman.h>
#include <wallet/scriptpubkeyman.h>
#include <wallet/transaction.h>
#include <wallet/types.h>
#include <wallet/walletdb.h>
#include <wallet/walletutil.h>
#include <algorithm>
#include <cassert>
#include <condition_variable>
#include <exception>
#include <optional>
#include <stdexcept>
#include <thread>
#include <tuple>
#include <variant>
struct KeyOriginInfo;
using common::AmountErrMsg;
using common::AmountHighWarn;
using common::PSBTError;
using interfaces::FoundBlock;
using util::ReplaceAll;
using util::ToString;
namespace wallet {
bool AddWalletSetting(interfaces::Chain& chain, const std::string& wallet_name)
{
const auto update_function = [&wallet_name](common::SettingsValue& setting_value) {
if (!setting_value.isArray()) setting_value.setArray();
for (const auto& value : setting_value.getValues()) {
if (value.isStr() && value.get_str() == wallet_name) return interfaces::SettingsAction::SKIP_WRITE;
}
setting_value.push_back(wallet_name);
return interfaces::SettingsAction::WRITE;
};
return chain.updateRwSetting("wallet", update_function);
}
bool RemoveWalletSetting(interfaces::Chain& chain, const std::string& wallet_name)
{
const auto update_function = [&wallet_name](common::SettingsValue& setting_value) {
if (!setting_value.isArray()) return interfaces::SettingsAction::SKIP_WRITE;
common::SettingsValue new_value(common::SettingsValue::VARR);
for (const auto& value : setting_value.getValues()) {
if (!value.isStr() || value.get_str() != wallet_name) new_value.push_back(value);
}
if (new_value.size() == setting_value.size()) return interfaces::SettingsAction::SKIP_WRITE;
setting_value = std::move(new_value);
return interfaces::SettingsAction::WRITE;
};
return chain.updateRwSetting("wallet", update_function);
}
static void UpdateWalletSetting(interfaces::Chain& chain,
const std::string& wallet_name,
std::optional<bool> load_on_startup,
std::vector<bilingual_str>& warnings)
{
if (!load_on_startup) return;
if (load_on_startup.value() && !AddWalletSetting(chain, wallet_name)) {
warnings.emplace_back(Untranslated("Wallet load on startup setting could not be updated, so wallet may not be loaded next node startup."));
} else if (!load_on_startup.value() && !RemoveWalletSetting(chain, wallet_name)) {
warnings.emplace_back(Untranslated("Wallet load on startup setting could not be updated, so wallet may still be loaded next node startup."));
}
}
/**
* Refresh mempool status so the wallet is in an internally consistent state and
* immediately knows the transaction's status: Whether it can be considered
* trusted and is eligible to be abandoned ...
*/
static void RefreshMempoolStatus(CWalletTx& tx, interfaces::Chain& chain)
{
if (chain.isInMempool(tx.GetHash())) {
tx.m_state = TxStateInMempool();
} else if (tx.state<TxStateInMempool>()) {
tx.m_state = TxStateInactive();
}
}
bool AddWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet)
{
LOCK(context.wallets_mutex);
assert(wallet);
std::vector<std::shared_ptr<CWallet>>::const_iterator i = std::find(context.wallets.begin(), context.wallets.end(), wallet);
if (i != context.wallets.end()) return false;
context.wallets.push_back(wallet);
wallet->ConnectScriptPubKeyManNotifiers();
wallet->NotifyCanGetAddressesChanged();
return true;
}
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start, std::vector<bilingual_str>& warnings)
{
assert(wallet);
interfaces::Chain& chain = wallet->chain();
std::string name = wallet->GetName();
// Unregister with the validation interface which also drops shared pointers.
wallet->m_chain_notifications_handler.reset();
{
LOCK(context.wallets_mutex);
std::vector<std::shared_ptr<CWallet>>::iterator i = std::find(context.wallets.begin(), context.wallets.end(), wallet);
if (i == context.wallets.end()) return false;
context.wallets.erase(i);
}
// Notify unload so that upper layers release the shared pointer.
wallet->NotifyUnload();
// Write the wallet setting
UpdateWalletSetting(chain, name, load_on_start, warnings);
return true;
}
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start)
{
std::vector<bilingual_str> warnings;
return RemoveWallet(context, wallet, load_on_start, warnings);
}
std::vector<std::shared_ptr<CWallet>> GetWallets(WalletContext& context)
{
LOCK(context.wallets_mutex);
return context.wallets;
}
std::shared_ptr<CWallet> GetDefaultWallet(WalletContext& context, size_t& count)
{
LOCK(context.wallets_mutex);
count = context.wallets.size();
return count == 1 ? context.wallets[0] : nullptr;
}
std::shared_ptr<CWallet> GetWallet(WalletContext& context, const std::string& name)
{
LOCK(context.wallets_mutex);
for (const std::shared_ptr<CWallet>& wallet : context.wallets) {
if (wallet->GetName() == name) return wallet;
}
return nullptr;
}
std::unique_ptr<interfaces::Handler> HandleLoadWallet(WalletContext& context, LoadWalletFn load_wallet)
{
LOCK(context.wallets_mutex);
auto it = context.wallet_load_fns.emplace(context.wallet_load_fns.end(), std::move(load_wallet));
return interfaces::MakeCleanupHandler([&context, it] { LOCK(context.wallets_mutex); context.wallet_load_fns.erase(it); });
}
void NotifyWalletLoaded(WalletContext& context, const std::shared_ptr<CWallet>& wallet)
{
LOCK(context.wallets_mutex);
for (auto& load_wallet : context.wallet_load_fns) {
load_wallet(interfaces::MakeWallet(context, wallet));
}
}
static GlobalMutex g_loading_wallet_mutex;
static GlobalMutex g_wallet_release_mutex;
static std::condition_variable g_wallet_release_cv;
static std::set<std::string> g_loading_wallet_set GUARDED_BY(g_loading_wallet_mutex);
static std::set<std::string> g_unloading_wallet_set GUARDED_BY(g_wallet_release_mutex);
// Custom deleter for shared_ptr<CWallet>.
static void FlushAndDeleteWallet(CWallet* wallet)
{
const std::string name = wallet->GetName();
wallet->WalletLogPrintf("Releasing wallet %s..\n", name);
wallet->Flush();
delete wallet;
// Wallet is now released, notify WaitForDeleteWallet, if any.
{
LOCK(g_wallet_release_mutex);
if (g_unloading_wallet_set.erase(name) == 0) {
// WaitForDeleteWallet was not called for this wallet, all done.
return;
}
}
g_wallet_release_cv.notify_all();
}
void WaitForDeleteWallet(std::shared_ptr<CWallet>&& wallet)
{
// Mark wallet for unloading.
const std::string name = wallet->GetName();
{
LOCK(g_wallet_release_mutex);
g_unloading_wallet_set.insert(name);
// Do not expect to be the only one removing this wallet.
// Multiple threads could simultaneously be waiting for deletion.
}
// Time to ditch our shared_ptr and wait for FlushAndDeleteWallet call.
wallet.reset();
{
WAIT_LOCK(g_wallet_release_mutex, lock);
while (g_unloading_wallet_set.count(name) == 1) {
g_wallet_release_cv.wait(lock);
}
}
}
namespace {
std::shared_ptr<CWallet> LoadWalletInternal(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
try {
std::unique_ptr<WalletDatabase> database = MakeWalletDatabase(name, options, status, error);
if (!database) {
error = Untranslated("Wallet file verification failed.") + Untranslated(" ") + error;
return nullptr;
}
context.chain->initMessage(_("Loading wallet…").translated);
std::shared_ptr<CWallet> wallet = CWallet::Create(context, name, std::move(database), options.create_flags, error, warnings);
if (!wallet) {
error = Untranslated("Wallet loading failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
// Legacy wallets are being deprecated, warn if the loaded wallet is legacy
if (!wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
warnings.emplace_back(_("Wallet loaded successfully. The legacy wallet type is being deprecated and support for creating and opening legacy wallets will be removed in the future. Legacy wallets can be migrated to a descriptor wallet with migratewallet."));
}
NotifyWalletLoaded(context, wallet);
AddWallet(context, wallet);
wallet->postInitProcess();
// Write the wallet setting
UpdateWalletSetting(*context.chain, name, load_on_start, warnings);
return wallet;
} catch (const std::runtime_error& e) {
error = Untranslated(e.what());
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
}
class FastWalletRescanFilter
{
public:
FastWalletRescanFilter(const CWallet& wallet) : m_wallet(wallet)
{
// fast rescanning via block filters is only supported by descriptor wallets right now
assert(!m_wallet.IsLegacy());
// create initial filter with scripts from all ScriptPubKeyMans
for (auto spkm : m_wallet.GetAllScriptPubKeyMans()) {
auto desc_spkm{dynamic_cast<DescriptorScriptPubKeyMan*>(spkm)};
assert(desc_spkm != nullptr);
AddScriptPubKeys(desc_spkm);
// save each range descriptor's end for possible future filter updates
if (desc_spkm->IsHDEnabled()) {
m_last_range_ends.emplace(desc_spkm->GetID(), desc_spkm->GetEndRange());
}
}
}
void UpdateIfNeeded()
{
// repopulate filter with new scripts if top-up has happened since last iteration
for (const auto& [desc_spkm_id, last_range_end] : m_last_range_ends) {
auto desc_spkm{dynamic_cast<DescriptorScriptPubKeyMan*>(m_wallet.GetScriptPubKeyMan(desc_spkm_id))};
assert(desc_spkm != nullptr);
int32_t current_range_end{desc_spkm->GetEndRange()};
if (current_range_end > last_range_end) {
AddScriptPubKeys(desc_spkm, last_range_end);
m_last_range_ends.at(desc_spkm->GetID()) = current_range_end;
}
}
}
std::optional<bool> MatchesBlock(const uint256& block_hash) const
{
return m_wallet.chain().blockFilterMatchesAny(BlockFilterType::BASIC, block_hash, m_filter_set);
}
private:
const CWallet& m_wallet;
/** Map for keeping track of each range descriptor's last seen end range.
* This information is used to detect whether new addresses were derived
* (that is, if the current end range is larger than the saved end range)
* after processing a block and hence a filter set update is needed to
* take possible keypool top-ups into account.
*/
std::map<uint256, int32_t> m_last_range_ends;
GCSFilter::ElementSet m_filter_set;
void AddScriptPubKeys(const DescriptorScriptPubKeyMan* desc_spkm, int32_t last_range_end = 0)
{
for (const auto& script_pub_key : desc_spkm->GetScriptPubKeys(last_range_end)) {
m_filter_set.emplace(script_pub_key.begin(), script_pub_key.end());
}
}
};
} // namespace
std::shared_ptr<CWallet> LoadWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
auto result = WITH_LOCK(g_loading_wallet_mutex, return g_loading_wallet_set.insert(name));
if (!result.second) {
error = Untranslated("Wallet already loading.");
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
auto wallet = LoadWalletInternal(context, name, load_on_start, options, status, error, warnings);
WITH_LOCK(g_loading_wallet_mutex, g_loading_wallet_set.erase(result.first));
return wallet;
}
std::shared_ptr<CWallet> CreateWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
uint64_t wallet_creation_flags = options.create_flags;
const SecureString& passphrase = options.create_passphrase;
ArgsManager& args = *Assert(context.args);
if (wallet_creation_flags & WALLET_FLAG_DESCRIPTORS) options.require_format = DatabaseFormat::SQLITE;
else if (args.GetBoolArg("-swapbdbendian", false)) {
options.require_format = DatabaseFormat::BERKELEY_SWAP;
}
// Indicate that the wallet is actually supposed to be blank and not just blank to make it encrypted
bool create_blank = (wallet_creation_flags & WALLET_FLAG_BLANK_WALLET);
// Born encrypted wallets need to be created blank first.
if (!passphrase.empty()) {
wallet_creation_flags |= WALLET_FLAG_BLANK_WALLET;
}
// Private keys must be disabled for an external signer wallet
if ((wallet_creation_flags & WALLET_FLAG_EXTERNAL_SIGNER) && !(wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
error = Untranslated("Private keys must be disabled when using an external signer");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Descriptor support must be enabled for an external signer wallet
if ((wallet_creation_flags & WALLET_FLAG_EXTERNAL_SIGNER) && !(wallet_creation_flags & WALLET_FLAG_DESCRIPTORS)) {
error = Untranslated("Descriptor support must be enabled when using an external signer");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Do not allow a passphrase when private keys are disabled
if (!passphrase.empty() && (wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
error = Untranslated("Passphrase provided but private keys are disabled. A passphrase is only used to encrypt private keys, so cannot be used for wallets with private keys disabled.");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Wallet::Verify will check if we're trying to create a wallet with a duplicate name.
std::unique_ptr<WalletDatabase> database = MakeWalletDatabase(name, options, status, error);
if (!database) {
error = Untranslated("Wallet file verification failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_VERIFY;
return nullptr;
}
// Make the wallet
context.chain->initMessage(_("Loading wallet…").translated);
std::shared_ptr<CWallet> wallet = CWallet::Create(context, name, std::move(database), wallet_creation_flags, error, warnings);
if (!wallet) {
error = Untranslated("Wallet creation failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Encrypt the wallet
if (!passphrase.empty() && !(wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
if (!wallet->EncryptWallet(passphrase)) {
error = Untranslated("Error: Wallet created but failed to encrypt.");
status = DatabaseStatus::FAILED_ENCRYPT;
return nullptr;
}
if (!create_blank) {
// Unlock the wallet
if (!wallet->Unlock(passphrase)) {
error = Untranslated("Error: Wallet was encrypted but could not be unlocked");
status = DatabaseStatus::FAILED_ENCRYPT;
return nullptr;
}
// Set a seed for the wallet
{
LOCK(wallet->cs_wallet);
if (wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
wallet->SetupDescriptorScriptPubKeyMans();
} else {
for (auto spk_man : wallet->GetActiveScriptPubKeyMans()) {
if (!spk_man->SetupGeneration()) {
error = Untranslated("Unable to generate initial keys");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
}
}
}
// Relock the wallet
wallet->Lock();
}
}
NotifyWalletLoaded(context, wallet);
AddWallet(context, wallet);
wallet->postInitProcess();
// Write the wallet settings
UpdateWalletSetting(*context.chain, name, load_on_start, warnings);
// Legacy wallets are being deprecated, warn if a newly created wallet is legacy
if (!(wallet_creation_flags & WALLET_FLAG_DESCRIPTORS)) {
warnings.emplace_back(_("Wallet created successfully. The legacy wallet type is being deprecated and support for creating and opening legacy wallets will be removed in the future."));
}
status = DatabaseStatus::SUCCESS;
return wallet;
}
std::shared_ptr<CWallet> RestoreWallet(WalletContext& context, const fs::path& backup_file, const std::string& wallet_name, std::optional<bool> load_on_start, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
DatabaseOptions options;
ReadDatabaseArgs(*context.args, options);
options.require_existing = true;
const fs::path wallet_path = fsbridge::AbsPathJoin(GetWalletDir(), fs::u8path(wallet_name));
auto wallet_file = wallet_path / "wallet.dat";
std::shared_ptr<CWallet> wallet;
try {
if (!fs::exists(backup_file)) {
error = Untranslated("Backup file does not exist");
status = DatabaseStatus::FAILED_INVALID_BACKUP_FILE;
return nullptr;
}
if (fs::exists(wallet_path) || !TryCreateDirectories(wallet_path)) {
error = Untranslated(strprintf("Failed to create database path '%s'. Database already exists.", fs::PathToString(wallet_path)));
status = DatabaseStatus::FAILED_ALREADY_EXISTS;
return nullptr;
}
fs::copy_file(backup_file, wallet_file, fs::copy_options::none);
wallet = LoadWallet(context, wallet_name, load_on_start, options, status, error, warnings);
} catch (const std::exception& e) {
assert(!wallet);
if (!error.empty()) error += Untranslated("\n");
error += Untranslated(strprintf("Unexpected exception: %s", e.what()));
}
if (!wallet) {
fs::remove_all(wallet_path);
}
return wallet;
}
/** @defgroup mapWallet
*
* @{
*/
const CWalletTx* CWallet::GetWalletTx(const uint256& hash) const
{
AssertLockHeld(cs_wallet);
const auto it = mapWallet.find(hash);
if (it == mapWallet.end())
return nullptr;
return &(it->second);
}
void CWallet::UpgradeKeyMetadata()
{
if (IsLocked() || IsWalletFlagSet(WALLET_FLAG_KEY_ORIGIN_METADATA)) {
return;
}
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return;
}
spk_man->UpgradeKeyMetadata();
SetWalletFlag(WALLET_FLAG_KEY_ORIGIN_METADATA);
}
void CWallet::UpgradeDescriptorCache()
{
if (!IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS) || IsLocked() || IsWalletFlagSet(WALLET_FLAG_LAST_HARDENED_XPUB_CACHED)) {
return;
}
for (ScriptPubKeyMan* spkm : GetAllScriptPubKeyMans()) {
DescriptorScriptPubKeyMan* desc_spkm = dynamic_cast<DescriptorScriptPubKeyMan*>(spkm);
desc_spkm->UpgradeDescriptorCache();
}
SetWalletFlag(WALLET_FLAG_LAST_HARDENED_XPUB_CACHED);
}
bool CWallet::Unlock(const SecureString& strWalletPassphrase)
{
CCrypter crypter;
CKeyingMaterial _vMasterKey;
{
LOCK(cs_wallet);
for (const MasterKeyMap::value_type& pMasterKey : mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, _vMasterKey))
continue; // try another master key
if (Unlock(_vMasterKey)) {
// Now that we've unlocked, upgrade the key metadata
UpgradeKeyMetadata();
// Now that we've unlocked, upgrade the descriptor cache
UpgradeDescriptorCache();
return true;
}
}
}
return false;
}
bool CWallet::ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase)
{
bool fWasLocked = IsLocked();
{
LOCK2(m_relock_mutex, cs_wallet);
Lock();
CCrypter crypter;
CKeyingMaterial _vMasterKey;
for (MasterKeyMap::value_type& pMasterKey : mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, _vMasterKey))
return false;
if (Unlock(_vMasterKey))
{
constexpr MillisecondsDouble target{100};
auto start{SteadyClock::now()};
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * target / (SteadyClock::now() - start));
start = SteadyClock::now();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * target / (SteadyClock::now() - start))) / 2;
if (pMasterKey.second.nDeriveIterations < 25000)
pMasterKey.second.nDeriveIterations = 25000;
WalletLogPrintf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Encrypt(_vMasterKey, pMasterKey.second.vchCryptedKey))
return false;
WalletBatch(GetDatabase()).WriteMasterKey(pMasterKey.first, pMasterKey.second);
if (fWasLocked)
Lock();
return true;
}
}
}
return false;
}
void CWallet::chainStateFlushed(ChainstateRole role, const CBlockLocator& loc)
{
// Don't update the best block until the chain is attached so that in case of a shutdown,
// the rescan will be restarted at next startup.
if (m_attaching_chain || role == ChainstateRole::BACKGROUND) {
return;
}
WalletBatch batch(GetDatabase());
batch.WriteBestBlock(loc);
}
void CWallet::SetMinVersion(enum WalletFeature nVersion, WalletBatch* batch_in)
{
LOCK(cs_wallet);
if (nWalletVersion >= nVersion)
return;
WalletLogPrintf("Setting minversion to %d\n", nVersion);
nWalletVersion = nVersion;
{
WalletBatch* batch = batch_in ? batch_in : new WalletBatch(GetDatabase());
if (nWalletVersion > 40000)
batch->WriteMinVersion(nWalletVersion);
if (!batch_in)
delete batch;
}
}
std::set<uint256> CWallet::GetConflicts(const uint256& txid) const
{
std::set<uint256> result;
AssertLockHeld(cs_wallet);
const auto it = mapWallet.find(txid);
if (it == mapWallet.end())
return result;
const CWalletTx& wtx = it->second;
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
for (const CTxIn& txin : wtx.tx->vin)
{
if (mapTxSpends.count(txin.prevout) <= 1)
continue; // No conflict if zero or one spends
range = mapTxSpends.equal_range(txin.prevout);
for (TxSpends::const_iterator _it = range.first; _it != range.second; ++_it)
result.insert(_it->second);
}
return result;
}
bool CWallet::HasWalletSpend(const CTransactionRef& tx) const
{
AssertLockHeld(cs_wallet);
const Txid& txid = tx->GetHash();
for (unsigned int i = 0; i < tx->vout.size(); ++i) {
if (IsSpent(COutPoint(txid, i))) {
return true;
}
}
return false;
}
void CWallet::Flush()
{
GetDatabase().Flush();
}
void CWallet::Close()
{
GetDatabase().Close();
}
void CWallet::SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator> range)
{
// We want all the wallet transactions in range to have the same metadata as
// the oldest (smallest nOrderPos).
// So: find smallest nOrderPos:
int nMinOrderPos = std::numeric_limits<int>::max();
const CWalletTx* copyFrom = nullptr;
for (TxSpends::iterator it = range.first; it != range.second; ++it) {
const CWalletTx* wtx = &mapWallet.at(it->second);
if (wtx->nOrderPos < nMinOrderPos) {
nMinOrderPos = wtx->nOrderPos;
copyFrom = wtx;
}
}
if (!copyFrom) {
return;
}
// Now copy data from copyFrom to rest:
for (TxSpends::iterator it = range.first; it != range.second; ++it)
{
const uint256& hash = it->second;
CWalletTx* copyTo = &mapWallet.at(hash);
if (copyFrom == copyTo) continue;
assert(copyFrom && "Oldest wallet transaction in range assumed to have been found.");
if (!copyFrom->IsEquivalentTo(*copyTo)) continue;
copyTo->mapValue = copyFrom->mapValue;
copyTo->vOrderForm = copyFrom->vOrderForm;
// fTimeReceivedIsTxTime not copied on purpose
// nTimeReceived not copied on purpose
copyTo->nTimeSmart = copyFrom->nTimeSmart;
copyTo->fFromMe = copyFrom->fFromMe;
// nOrderPos not copied on purpose
// cached members not copied on purpose
}
}
/**
* Outpoint is spent if any non-conflicted transaction
* spends it:
*/
bool CWallet::IsSpent(const COutPoint& outpoint) const
{
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
range = mapTxSpends.equal_range(outpoint);
for (TxSpends::const_iterator it = range.first; it != range.second; ++it) {
const uint256& wtxid = it->second;
const auto mit = mapWallet.find(wtxid);
if (mit != mapWallet.end()) {
const auto& wtx = mit->second;
if (!wtx.isAbandoned() && !wtx.isBlockConflicted() && !wtx.isMempoolConflicted())
return true; // Spent
}
}
return false;
}
void CWallet::AddToSpends(const COutPoint& outpoint, const uint256& wtxid, WalletBatch* batch)
{
mapTxSpends.insert(std::make_pair(outpoint, wtxid));
if (batch) {
UnlockCoin(outpoint, batch);
} else {
WalletBatch temp_batch(GetDatabase());
UnlockCoin(outpoint, &temp_batch);
}
std::pair<TxSpends::iterator, TxSpends::iterator> range;
range = mapTxSpends.equal_range(outpoint);
SyncMetaData(range);
}
void CWallet::AddToSpends(const CWalletTx& wtx, WalletBatch* batch)
{
if (wtx.IsCoinBase()) // Coinbases don't spend anything!
return;
for (const CTxIn& txin : wtx.tx->vin)
AddToSpends(txin.prevout, wtx.GetHash(), batch);
}
bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
{
if (IsCrypted())
return false;
CKeyingMaterial _vMasterKey;
_vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
GetStrongRandBytes(_vMasterKey);
CMasterKey kMasterKey;
kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
GetStrongRandBytes(kMasterKey.vchSalt);
CCrypter crypter;
constexpr MillisecondsDouble target{100};
auto start{SteadyClock::now()};
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = static_cast<unsigned int>(25000 * target / (SteadyClock::now() - start));
start = SteadyClock::now();
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + static_cast<unsigned int>(kMasterKey.nDeriveIterations * target / (SteadyClock::now() - start))) / 2;
if (kMasterKey.nDeriveIterations < 25000)
kMasterKey.nDeriveIterations = 25000;
WalletLogPrintf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
return false;
if (!crypter.Encrypt(_vMasterKey, kMasterKey.vchCryptedKey))
return false;
{
LOCK2(m_relock_mutex, cs_wallet);
mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
WalletBatch* encrypted_batch = new WalletBatch(GetDatabase());
if (!encrypted_batch->TxnBegin()) {
delete encrypted_batch;
encrypted_batch = nullptr;
return false;
}
encrypted_batch->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
for (const auto& spk_man_pair : m_spk_managers) {
auto spk_man = spk_man_pair.second.get();
if (!spk_man->Encrypt(_vMasterKey, encrypted_batch)) {
encrypted_batch->TxnAbort();
delete encrypted_batch;
encrypted_batch = nullptr;
// We now probably have half of our keys encrypted in memory, and half not...
// die and let the user reload the unencrypted wallet.
assert(false);
}
}
// Encryption was introduced in version 0.4.0
SetMinVersion(FEATURE_WALLETCRYPT, encrypted_batch);
if (!encrypted_batch->TxnCommit()) {
delete encrypted_batch;
encrypted_batch = nullptr;
// We now have keys encrypted in memory, but not on disk...
// die to avoid confusion and let the user reload the unencrypted wallet.
assert(false);
}
delete encrypted_batch;
encrypted_batch = nullptr;
Lock();
Unlock(strWalletPassphrase);
// If we are using descriptors, make new descriptors with a new seed
if (IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS) && !IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET)) {
SetupDescriptorScriptPubKeyMans();
} else if (auto spk_man = GetLegacyScriptPubKeyMan()) {
// if we are using HD, replace the HD seed with a new one
if (spk_man->IsHDEnabled()) {
if (!spk_man->SetupGeneration(true)) {
return false;
}
}
}
Lock();
// Need to completely rewrite the wallet file; if we don't, bdb might keep
// bits of the unencrypted private key in slack space in the database file.
GetDatabase().Rewrite();
// BDB seems to have a bad habit of writing old data into
// slack space in .dat files; that is bad if the old data is
// unencrypted private keys. So:
GetDatabase().ReloadDbEnv();
}
NotifyStatusChanged(this);
return true;
}
DBErrors CWallet::ReorderTransactions()
{
LOCK(cs_wallet);
WalletBatch batch(GetDatabase());
// Old wallets didn't have any defined order for transactions
// Probably a bad idea to change the output of this
// First: get all CWalletTx into a sorted-by-time multimap.
typedef std::multimap<int64_t, CWalletTx*> TxItems;
TxItems txByTime;
for (auto& entry : mapWallet)
{
CWalletTx* wtx = &entry.second;
txByTime.insert(std::make_pair(wtx->nTimeReceived, wtx));
}
nOrderPosNext = 0;
std::vector<int64_t> nOrderPosOffsets;
for (TxItems::iterator it = txByTime.begin(); it != txByTime.end(); ++it)
{
CWalletTx *const pwtx = (*it).second;
int64_t& nOrderPos = pwtx->nOrderPos;
if (nOrderPos == -1)
{
nOrderPos = nOrderPosNext++;
nOrderPosOffsets.push_back(nOrderPos);
if (!batch.WriteTx(*pwtx))
return DBErrors::LOAD_FAIL;
}
else
{
int64_t nOrderPosOff = 0;
for (const int64_t& nOffsetStart : nOrderPosOffsets)
{
if (nOrderPos >= nOffsetStart)
++nOrderPosOff;
}
nOrderPos += nOrderPosOff;
nOrderPosNext = std::max(nOrderPosNext, nOrderPos + 1);
if (!nOrderPosOff)
continue;
// Since we're changing the order, write it back
if (!batch.WriteTx(*pwtx))
return DBErrors::LOAD_FAIL;
}
}
batch.WriteOrderPosNext(nOrderPosNext);
return DBErrors::LOAD_OK;
}
int64_t CWallet::IncOrderPosNext(WalletBatch* batch)
{
AssertLockHeld(cs_wallet);
int64_t nRet = nOrderPosNext++;
if (batch) {
batch->WriteOrderPosNext(nOrderPosNext);
} else {
WalletBatch(GetDatabase()).WriteOrderPosNext(nOrderPosNext);
}
return nRet;
}
void CWallet::MarkDirty()
{
{
LOCK(cs_wallet);
for (std::pair<const uint256, CWalletTx>& item : mapWallet)
item.second.MarkDirty();
}
}
bool CWallet::MarkReplaced(const uint256& originalHash, const uint256& newHash)
{
LOCK(cs_wallet);
auto mi = mapWallet.find(originalHash);
// There is a bug if MarkReplaced is not called on an existing wallet transaction.
assert(mi != mapWallet.end());
CWalletTx& wtx = (*mi).second;
// Ensure for now that we're not overwriting data
assert(wtx.mapValue.count("replaced_by_txid") == 0);
wtx.mapValue["replaced_by_txid"] = newHash.ToString();