-
Notifications
You must be signed in to change notification settings - Fork 63
/
blockchain_storage.cpp
2346 lines (2161 loc) · 95.1 KB
/
blockchain_storage.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) 2012-2013 The Cryptonote developers
// Copyright (c) 2012-2013 The Boolberry developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <algorithm>
#include <cstdio>
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include "include_base_utils.h"
#include "currency_basic_impl.h"
#include "blockchain_storage.h"
#include "currency_format_utils.h"
#include "currency_boost_serialization.h"
#include "blockchain_storage_boost_serialization.h"
#include "currency_config.h"
#include "miner.h"
#include "misc_language.h"
#include "profile_tools.h"
#include "file_io_utils.h"
#include "common/boost_serialization_helper.h"
#include "warnings.h"
#include "crypto/hash.h"
#include "miner_common.h"
using namespace std;
using namespace epee;
using namespace currency;
DISABLE_VS_WARNINGS(4267)
//------------------------------------------------------------------
blockchain_storage::blockchain_storage(tx_memory_pool& tx_pool):m_tx_pool(tx_pool),
m_current_block_cumul_sz_limit(0),
m_is_in_checkpoint_zone(false),
m_donations_account(AUTO_VAL_INIT(m_donations_account)),
m_royalty_account(AUTO_VAL_INIT(m_royalty_account)),
m_is_blockchain_storing(false),
m_current_pruned_rs_height(0)
{
bool r = get_donation_accounts(m_donations_account, m_royalty_account);
CHECK_AND_ASSERT_THROW_MES(r, "failed to load donation accounts");
}
//------------------------------------------------------------------
bool blockchain_storage::have_tx(const crypto::hash &id)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
return m_transactions.find(id) != m_transactions.end();
}
//------------------------------------------------------------------
bool blockchain_storage::have_tx_keyimg_as_spent(const crypto::key_image &key_im)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
return m_spent_keys.find(key_im) != m_spent_keys.end();
}
//------------------------------------------------------------------
transaction *blockchain_storage::get_tx(const crypto::hash &id)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
auto it = m_transactions.find(id);
if (it == m_transactions.end())
return NULL;
return &it->second.tx;
}
//------------------------------------------------------------------
uint64_t blockchain_storage::get_current_blockchain_height()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
return m_blocks.size();
}
//------------------------------------------------------------------
void blockchain_storage::fill_addr_to_alias_dict()
{
for (const auto& a : m_aliases)
{
if (a.second.size())
{
m_addr_to_alias[a.second.back().m_address] = a.first;
}
}
}
//------------------------------------------------------------------
bool blockchain_storage::init(const std::string& config_folder)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
m_config_folder = config_folder;
LOG_PRINT_L0("Loading blockchain...");
const std::string filename = m_config_folder + "/" CURRENCY_BLOCKCHAINDATA_FILENAME;
if(!tools::unserialize_obj_from_file(*this, filename))
{
LOG_PRINT_L0("Can't load blockchain storage from file, generating genesis block.");
block bl = boost::value_initialized<block>();
block_verification_context bvc = boost::value_initialized<block_verification_context>();
generate_genesis_block(bl);
add_new_block(bl, bvc);
CHECK_AND_ASSERT_MES(!bvc.m_verifivation_failed && bvc.m_added_to_main_chain, false, "Failed to add genesis block to blockchain");
}
if(!m_blocks.size())
{
LOG_PRINT_L0("Blockchain not loaded, generating genesis block.");
block bl = boost::value_initialized<block>();
block_verification_context bvc = boost::value_initialized<block_verification_context>();
generate_genesis_block(bl);
add_new_block(bl, bvc);
CHECK_AND_ASSERT_MES(!bvc.m_verifivation_failed, false, "Failed to add genesis block to blockchain");
}
uint64_t timestamp_diff = time(NULL) - m_blocks.back().bl.timestamp;
if(!m_blocks.back().bl.timestamp)
timestamp_diff = time(NULL) - 1341378000;
fill_addr_to_alias_dict();
LOG_PRINT_GREEN("Blockchain initialized. last block: " << m_blocks.size()-1 << ", " << misc_utils::get_time_interval_string(timestamp_diff) << " time ago, current difficulty: " << get_difficulty_for_next_block(), LOG_LEVEL_0);
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::store_blockchain()
{
m_is_blockchain_storing = true;
misc_utils::auto_scope_leave_caller scope_exit_handler = misc_utils::create_scope_leave_handler([&](){m_is_blockchain_storing=false;});
LOG_PRINT_L0("Storing blockchain...");
if (!tools::create_directories_if_necessary(m_config_folder))
{
LOG_PRINT_L0("Failed to create data directory: " << m_config_folder);
return false;
}
const std::string temp_filename = m_config_folder + "/" CURRENCY_BLOCKCHAINDATA_TEMP_FILENAME;
// There is a chance that temp_filename and filename are hardlinks to the same file
std::remove(temp_filename.c_str());
if(!tools::serialize_obj_to_file(*this, temp_filename))
{
//achtung!
LOG_ERROR("Failed to save blockchain data to file: " << temp_filename);
return false;
}
const std::string filename = m_config_folder + "/" CURRENCY_BLOCKCHAINDATA_FILENAME;
std::error_code ec = tools::replace_file(temp_filename, filename);
if (ec)
{
LOG_ERROR("Failed to rename blockchain data file " << temp_filename << " to " << filename << ": " << ec.message() << ':' << ec.value());
return false;
}
LOG_PRINT_L0("Blockchain stored OK.");
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::deinit()
{
return store_blockchain();
}
//------------------------------------------------------------------
bool blockchain_storage::pop_block_from_blockchain()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
CHECK_AND_ASSERT_MES(m_blocks.size() > 1, false, "pop_block_from_blockchain: can't pop from blockchain with size = " << m_blocks.size());
size_t h = m_blocks.size()-1;
block_extended_info& bei = m_blocks[h];
pop_block_scratchpad_data(bei.bl, m_scratchpad);
//crypto::hash id = get_block_hash(bei.bl);
bool r = purge_block_data_from_blockchain(bei.bl, bei.bl.tx_hashes.size());
CHECK_AND_ASSERT_MES(r, false, "Failed to purge_block_data_from_blockchain for block " << get_block_hash(bei.bl) << " on height " << h);
//remove from index
auto bl_ind = m_blocks_index.find(get_block_hash(bei.bl));
CHECK_AND_ASSERT_MES(bl_ind != m_blocks_index.end(), false, "pop_block_from_blockchain: blockchain id not found in index");
m_blocks_index.erase(bl_ind);
//pop block from core
m_blocks.pop_back();
m_tx_pool.on_blockchain_dec(m_blocks.size()-1, get_top_block_id());
return true;
}
//------------------------------------------------------------------
void blockchain_storage::set_checkpoints(checkpoints&& chk_pts)
{
m_checkpoints = chk_pts;
prune_ring_signatures_if_need();
}
//------------------------------------------------------------------
bool blockchain_storage::prune_ring_signatures(uint64_t height, uint64_t& transactions_pruned, uint64_t& signatures_pruned)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
CHECK_AND_ASSERT_MES(height < m_blocks.size(), false, "prune_ring_signatures called with wrong parametr " << height << ", m_blocks.size() " << m_blocks.size());
for(const auto& h: m_blocks[height].bl.tx_hashes)
{
auto it = m_transactions.find(h);
CHECK_AND_ASSERT_MES(it != m_transactions.end(), false, "failed to find transaction " << h << " in blockchain index, in block on height = " << height);
CHECK_AND_ASSERT_MES(it->second.m_keeper_block_height == height, false,
"failed to validate extra check, it->second.m_keeper_block_height = " << it->second.m_keeper_block_height <<
"is mot equal to height = " << height << " in blockchain index, for block on height = " << height);
signatures_pruned += it->second.tx.signatures.size();
it->second.tx.signatures.clear();
++transactions_pruned;
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::prune_ring_signatures_if_need()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(m_blocks.size() && m_checkpoints.get_top_checkpoint_height() && m_checkpoints.get_top_checkpoint_height() > m_current_pruned_rs_height)
{
LOG_PRINT_CYAN("Starting pruning ring signatues...", LOG_LEVEL_0);
uint64_t tx_count = 0, sig_count = 0;
for(uint64_t height = m_current_pruned_rs_height; height < m_blocks.size() && height <= m_checkpoints.get_top_checkpoint_height(); height++)
{
bool res = prune_ring_signatures(height, tx_count, sig_count);
CHECK_AND_ASSERT_MES(res, false, "filed to prune_ring_signatures for height = " << height);
}
m_current_pruned_rs_height = m_checkpoints.get_top_checkpoint_height();
LOG_PRINT_CYAN("Transaction pruning finished: " << sig_count << " signatures released in " << tx_count << " transactions.", LOG_LEVEL_0);
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::reset_and_set_genesis_block(const block& b)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
m_transactions.clear();
m_spent_keys.clear();
m_blocks.clear();
m_blocks_index.clear();
m_alternative_chains.clear();
m_outputs.clear();
m_scratchpad.clear();
block_verification_context bvc = boost::value_initialized<block_verification_context>();
add_new_block(b, bvc);
return bvc.m_added_to_main_chain && !bvc.m_verifivation_failed;
}
//------------------------------------------------------------------
//TODO: not the best way, add later update method instead of full copy
bool blockchain_storage::copy_scratchpad(std::vector<crypto::hash>& scr)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
scr = m_scratchpad;
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::copy_scratchpad(std::string& dst)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
if (m_scratchpad.size())
{
dst.append(reinterpret_cast<const char*>(&m_scratchpad[0]), m_scratchpad.size() * 32);
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::purge_transaction_keyimages_from_blockchain(const transaction& tx, bool strict_check)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
struct purge_transaction_visitor: public boost::static_visitor<bool>
{
blockchain_storage& m_bcs;
key_images_container& m_spent_keys;
bool m_strict_check;
purge_transaction_visitor(blockchain_storage& bcs, key_images_container& spent_keys, bool strict_check):
m_bcs(bcs),
m_spent_keys(spent_keys),
m_strict_check(strict_check){}
bool operator()(const txin_to_key& inp) const
{
//const crypto::key_image& ki = inp.k_image;
auto r = m_spent_keys.find(inp.k_image);
if(r != m_spent_keys.end())
{
m_spent_keys.erase(r);
}else
{
CHECK_AND_ASSERT_MES(!m_strict_check, false, "purge_block_data_from_blockchain: key image in transaction not found");
}
if(inp.key_offsets.size() == 1)
{
//direct spend detected
if(!m_bcs.update_spent_tx_flags_for_input(inp.amount, inp.key_offsets[0], false))
{
//internal error
LOG_PRINT_L0("Failed to update_spent_tx_flags_for_input");
return false;
}
}
return true;
}
bool operator()(const txin_gen& inp) const
{
return true;
}
bool operator()(const txin_to_script& tx) const
{
return false;
}
bool operator()(const txin_to_scripthash& tx) const
{
return false;
}
};
BOOST_FOREACH(const txin_v& in, tx.vin)
{
bool r = boost::apply_visitor(purge_transaction_visitor(*this, m_spent_keys, strict_check), in);
CHECK_AND_ASSERT_MES(!strict_check || r, false, "failed to process purge_transaction_visitor");
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::purge_transaction_from_blockchain(const crypto::hash& tx_id)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
auto tx_index_it = m_transactions.find(tx_id);
CHECK_AND_ASSERT_MES(tx_index_it != m_transactions.end(), false, "purge_block_data_from_blockchain: transaction not found in blockchain index!!");
transaction& tx = tx_index_it->second.tx;
purge_transaction_keyimages_from_blockchain(tx, true);
bool r = unprocess_blockchain_tx_extra(tx);
CHECK_AND_ASSERT_MES(r, false, "failed to unprocess_blockchain_tx_extra");
if(!is_coinbase(tx))
{
currency::tx_verification_context tvc = AUTO_VAL_INIT(tvc);
bool r = m_tx_pool.add_tx(tx, tvc, true);
CHECK_AND_ASSERT_MES(r, false, "purge_block_data_from_blockchain: failed to add transaction to transaction pool");
}
bool res = pop_transaction_from_global_index(tx, tx_id);
m_transactions.erase(tx_index_it);
LOG_PRINT_L1("Removed transaction from blockchain history:" << tx_id << ENDL);
return res;
}
//------------------------------------------------------------------
bool blockchain_storage::purge_block_data_from_blockchain(const block& bl, size_t processed_tx_count)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
bool res = true;
CHECK_AND_ASSERT_MES(processed_tx_count <= bl.tx_hashes.size(), false, "wrong processed_tx_count in purge_block_data_from_blockchain");
for(size_t count = 0; count != processed_tx_count; count++)
{
res = purge_transaction_from_blockchain(bl.tx_hashes[(processed_tx_count -1)- count]) && res;
}
res = purge_transaction_from_blockchain(get_transaction_hash(bl.miner_tx)) && res;
return res;
}
//------------------------------------------------------------------
crypto::hash blockchain_storage::get_top_block_id(uint64_t& height)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
height = get_current_blockchain_height()-1;
return get_top_block_id();
}
//------------------------------------------------------------------
crypto::hash blockchain_storage::get_top_block_id()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
crypto::hash id = null_hash;
if(m_blocks.size())
{
get_block_hash(m_blocks.back().bl, id);
}
return id;
}
//------------------------------------------------------------------
bool blockchain_storage::get_top_block(block& b)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
CHECK_AND_ASSERT_MES(m_blocks.size(), false, "Wrong blockchain state, m_blocks.size()=0!");
b = m_blocks.back().bl;
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::get_short_chain_history(std::list<crypto::hash>& ids)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
size_t i = 0;
size_t current_multiplier = 1;
size_t sz = m_blocks.size();
if(!sz)
return true;
size_t current_back_offset = 1;
bool genesis_included = false;
while(current_back_offset < sz)
{
ids.push_back(get_block_hash(m_blocks[sz-current_back_offset].bl));
if(sz-current_back_offset == 0)
genesis_included = true;
if(i < 10)
{
++current_back_offset;
}else
{
current_back_offset += current_multiplier *= 2;
}
++i;
}
if(!genesis_included)
ids.push_back(get_block_hash(m_blocks[0].bl));
return true;
}
//------------------------------------------------------------------
crypto::hash blockchain_storage::get_block_id_by_height(uint64_t height)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(height >= m_blocks.size())
return null_hash;
return get_block_hash(m_blocks[height].bl);
}
//------------------------------------------------------------------
bool blockchain_storage::get_block_by_hash(const crypto::hash &h, block &blk) {
CRITICAL_REGION_LOCAL(m_blockchain_lock);
// try to find block in main chain
blocks_by_id_index::const_iterator it = m_blocks_index.find(h);
if (m_blocks_index.end() != it) {
blk = m_blocks[it->second].bl;
return true;
}
// try to find block in alternative chain
blocks_ext_by_hash::const_iterator it_alt = m_alternative_chains.find(h);
if (m_alternative_chains.end() != it_alt) {
blk = it_alt->second.bl;
return true;
}
return false;
}
//------------------------------------------------------------------
bool blockchain_storage::get_block_by_height(uint64_t h, block &blk)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(h >= m_blocks.size() )
return false;
blk = m_blocks[h].bl;
return true;
}
//------------------------------------------------------------------
void blockchain_storage::get_all_known_block_ids(std::list<crypto::hash> &main, std::list<crypto::hash> &alt, std::list<crypto::hash> &invalid) {
CRITICAL_REGION_LOCAL(m_blockchain_lock);
BOOST_FOREACH(blocks_by_id_index::value_type &v, m_blocks_index)
main.push_back(v.first);
BOOST_FOREACH(blocks_ext_by_hash::value_type &v, m_alternative_chains)
alt.push_back(v.first);
BOOST_FOREACH(blocks_ext_by_hash::value_type &v, m_invalid_blocks)
invalid.push_back(v.first);
}
//------------------------------------------------------------------
wide_difficulty_type blockchain_storage::get_difficulty_for_next_block()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
std::vector<uint64_t> timestamps;
std::vector<wide_difficulty_type> commulative_difficulties;
size_t offset = m_blocks.size() - std::min(m_blocks.size(), static_cast<size_t>(DIFFICULTY_BLOCKS_COUNT));
if(!offset)
++offset;//skip genesis block
for(; offset < m_blocks.size(); offset++)
{
timestamps.push_back(m_blocks[offset].bl.timestamp);
commulative_difficulties.push_back(m_blocks[offset].cumulative_difficulty);
}
return next_difficulty(timestamps, commulative_difficulties);
}
//------------------------------------------------------------------
bool blockchain_storage::rollback_blockchain_switching(std::list<block>& original_chain, size_t rollback_height)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
//remove failed subchain
for(size_t i = m_blocks.size()-1; i >=rollback_height; i--)
{
bool r = pop_block_from_blockchain();
CHECK_AND_ASSERT_MES(r, false, "PANIC!!! failed to remove block while chain switching during the rollback!");
}
//return back original chain
BOOST_FOREACH(auto& bl, original_chain)
{
block_verification_context bvc = boost::value_initialized<block_verification_context>();
bool r = handle_block_to_main_chain(bl, bvc);
CHECK_AND_ASSERT_MES(r && bvc.m_added_to_main_chain, false, "PANIC!!! failed to add (again) block while chain switching during the rollback!");
}
LOG_PRINT_L0("Rollback success.");
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::switch_to_alternative_blockchain(std::list<blocks_ext_by_hash::iterator>& alt_chain)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
CHECK_AND_ASSERT_MES(alt_chain.size(), false, "switch_to_alternative_blockchain: empty chain passed");
size_t split_height = alt_chain.front()->second.height;
CHECK_AND_ASSERT_MES(m_blocks.size() > split_height, false, "switch_to_alternative_blockchain: blockchain size is lower than split height");
//disconnecting old chain
std::list<block> disconnected_chain;
for(size_t i = m_blocks.size()-1; i >=split_height; i--)
{
block b = m_blocks[i].bl;
bool r = pop_block_from_blockchain();
CHECK_AND_ASSERT_MES(r, false, "failed to remove block on chain switching");
disconnected_chain.push_front(b);
}
//connecting new alternative chain
for(auto alt_ch_iter = alt_chain.begin(); alt_ch_iter != alt_chain.end(); alt_ch_iter++)
{
auto ch_ent = *alt_ch_iter;
block_verification_context bvc = boost::value_initialized<block_verification_context>();
bool r = handle_block_to_main_chain(ch_ent->second.bl, bvc);
if(!r || !bvc.m_added_to_main_chain)
{
LOG_PRINT_L0("Failed to switch to alternative blockchain");
rollback_blockchain_switching(disconnected_chain, split_height);
add_block_as_invalid(ch_ent->second, get_block_hash(ch_ent->second.bl));
LOG_PRINT_L0("The block was inserted as invalid while connecting new alternative chain, block_id: " << get_block_hash(ch_ent->second.bl));
m_alternative_chains.erase(ch_ent);
for(auto alt_ch_to_orph_iter = ++alt_ch_iter; alt_ch_to_orph_iter != alt_chain.end(); alt_ch_to_orph_iter++)
{
//block_verification_context bvc = boost::value_initialized<block_verification_context>();
add_block_as_invalid((*alt_ch_iter)->second, (*alt_ch_iter)->first);
m_alternative_chains.erase(*alt_ch_to_orph_iter);
}
return false;
}
}
//pushing old chain as alternative chain
BOOST_FOREACH(auto& old_ch_ent, disconnected_chain)
{
block_verification_context bvc = boost::value_initialized<block_verification_context>();
bool r = handle_alternative_block(old_ch_ent, get_block_hash(old_ch_ent), bvc);
if(!r)
{
LOG_ERROR("Failed to push ex-main chain blocks to alternative chain ");
rollback_blockchain_switching(disconnected_chain, split_height);
return false;
}
}
//removing all_chain entries from alternative chain
BOOST_FOREACH(auto ch_ent, alt_chain)
{
m_alternative_chains.erase(ch_ent);
}
LOG_PRINT_GREEN("REORGANIZE SUCCESS! on height: " << split_height << ", new blockchain size: " << m_blocks.size(), LOG_LEVEL_0);
return true;
}
//------------------------------------------------------------------
wide_difficulty_type blockchain_storage::get_next_difficulty_for_alternative_chain(const std::list<blocks_ext_by_hash::iterator>& alt_chain, block_extended_info& bei)
{
std::vector<uint64_t> timestamps;
std::vector<wide_difficulty_type> commulative_difficulties;
if(alt_chain.size()< DIFFICULTY_BLOCKS_COUNT)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
size_t main_chain_stop_offset = alt_chain.size() ? alt_chain.front()->second.height : bei.height;
size_t main_chain_count = DIFFICULTY_BLOCKS_COUNT - std::min(static_cast<size_t>(DIFFICULTY_BLOCKS_COUNT), alt_chain.size());
main_chain_count = std::min(main_chain_count, main_chain_stop_offset);
size_t main_chain_start_offset = main_chain_stop_offset - main_chain_count;
if(!main_chain_start_offset)
++main_chain_start_offset; //skip genesis block
for(; main_chain_start_offset < main_chain_stop_offset; ++main_chain_start_offset)
{
timestamps.push_back(m_blocks[main_chain_start_offset].bl.timestamp);
commulative_difficulties.push_back(m_blocks[main_chain_start_offset].cumulative_difficulty);
}
CHECK_AND_ASSERT_MES((alt_chain.size() + timestamps.size()) <= DIFFICULTY_BLOCKS_COUNT, false, "Internal error, alt_chain.size()["<< alt_chain.size()
<< "] + vtimestampsec.size()[" << timestamps.size() << "] NOT <= DIFFICULTY_WINDOW[]" << DIFFICULTY_BLOCKS_COUNT );
BOOST_FOREACH(auto it, alt_chain)
{
timestamps.push_back(it->second.bl.timestamp);
commulative_difficulties.push_back(it->second.cumulative_difficulty);
}
}else
{
timestamps.resize(std::min(alt_chain.size(), static_cast<size_t>(DIFFICULTY_BLOCKS_COUNT)));
commulative_difficulties.resize(std::min(alt_chain.size(), static_cast<size_t>(DIFFICULTY_BLOCKS_COUNT)));
size_t count = 0;
size_t max_i = timestamps.size()-1;
BOOST_REVERSE_FOREACH(auto it, alt_chain)
{
timestamps[max_i - count] = it->second.bl.timestamp;
commulative_difficulties[max_i - count] = it->second.cumulative_difficulty;
count++;
if(count >= DIFFICULTY_BLOCKS_COUNT)
break;
}
}
return next_difficulty(timestamps, commulative_difficulties);
}
//------------------------------------------------------------------
bool blockchain_storage::prevalidate_miner_transaction(const block& b, uint64_t height)
{
CHECK_AND_ASSERT_MES(b.miner_tx.vin.size() == 1, false, "coinbase transaction in the block has no inputs");
CHECK_AND_ASSERT_MES(b.miner_tx.vin[0].type() == typeid(txin_gen), false, "coinbase transaction in the block has the wrong type");
if(boost::get<txin_gen>(b.miner_tx.vin[0]).height != height)
{
LOG_PRINT_RED_L0("The miner transaction in block has invalid height: " << boost::get<txin_gen>(b.miner_tx.vin[0]).height << ", expected: " << height);
return false;
}
CHECK_AND_ASSERT_MES(b.miner_tx.unlock_time == height + CURRENCY_MINED_MONEY_UNLOCK_WINDOW,
false,
"coinbase transaction transaction have wrong unlock time=" << b.miner_tx.unlock_time << ", expected " << height + CURRENCY_MINED_MONEY_UNLOCK_WINDOW);
//check outs overflow
if(!check_outs_overflow(b.miner_tx))
{
LOG_PRINT_RED_L0("miner transaction have money overflow in block " << get_block_hash(b));
return false;
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::lookfor_donation(const transaction& tx, uint64_t& donation, uint64_t& royalty)
{
crypto::public_key coin_base_tx_pub_key = null_pkey;
bool r = parse_and_validate_tx_extra(tx, coin_base_tx_pub_key);
CHECK_AND_ASSERT_MES(r, false, "Failed to validate coinbase extra");
if(tx.vout.size() >= 2)
{
//check donations value
size_t i = tx.vout.size()-2;
CHECK_AND_ASSERT_MES(tx.vout[i].target.type() == typeid(txout_to_key), false, "wrong type id in transaction out" );
if(is_out_to_acc(m_donations_account, boost::get<txout_to_key>(tx.vout[i].target), coin_base_tx_pub_key, i) )
{
donation = tx.vout[i].amount;
}
}
if(tx.vout.size() >= 1)
{
size_t i = tx.vout.size()-1;
CHECK_AND_ASSERT_MES(tx.vout[i].target.type() == typeid(txout_to_key), false, "wrong type id in transaction out" );
if(donation)
{
//donations already found, check royalty
if(is_out_to_acc(m_royalty_account, boost::get<txout_to_key>(tx.vout[i].target), coin_base_tx_pub_key, i) )
{
royalty = tx.vout[i].amount;
}
}else
{
//only donations, without royalty
if(is_out_to_acc(m_donations_account, boost::get<txout_to_key>(tx.vout[i].target), coin_base_tx_pub_key, i) )
{
donation = tx.vout[i].amount;
}
}
}
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::get_required_donations_value_for_next_block(uint64_t& don_am)
{
TRY_ENTRY();
CRITICAL_REGION_LOCAL(m_blockchain_lock);
uint64_t sz = get_current_blockchain_height();
if(sz < CURRENCY_DONATIONS_INTERVAL || sz%CURRENCY_DONATIONS_INTERVAL)
{
LOG_ERROR("internal error: validate_donations_value at wrong height: " << get_current_blockchain_height());
return false;
}
std::vector<bool> donation_votes;
for(size_t i = m_blocks.size() - CURRENCY_DONATIONS_INTERVAL; i!= m_blocks.size(); i++)
donation_votes.push_back(!(m_blocks[i].bl.flags&BLOCK_FLAGS_SUPPRESS_DONATION));
don_am = get_donations_anount_for_day(m_blocks.back().already_donated_coins, donation_votes);
return true;
CATCH_ENTRY_L0("blockchain_storage::validate_donations_value", false);
}
//------------------------------------------------------------------
bool blockchain_storage::validate_donations_value(uint64_t donation, uint64_t royalty)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
uint64_t expected_don_total = 0;
if(!get_required_donations_value_for_next_block(expected_don_total))
return false;
CHECK_AND_ASSERT_MES(donation + royalty == expected_don_total, false, "Wrong donations amount: " << donation + royalty << ", expected " << expected_don_total);
uint64_t expected_donation = 0;
uint64_t expected_royalty = 0;
get_donation_parts(expected_don_total, expected_royalty, expected_donation);
CHECK_AND_ASSERT_MES(expected_royalty == royalty && expected_donation == donation,
false,
"wrong donation parts: " << donation << "/" << royalty << ", expected: " << expected_donation << "/" << expected_royalty);
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::validate_miner_transaction(const block& b, size_t cumulative_block_size, uint64_t fee, uint64_t& base_reward, uint64_t already_generated_coins, uint64_t already_donated_coins, uint64_t& donation_total)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
//validate reward
uint64_t money_in_use = 0;
uint64_t royalty = 0;
uint64_t donation = 0;
//donations should be last one
//size_t outs_total = b.miner_tx.vout.size();
BOOST_FOREACH(auto& o, b.miner_tx.vout)
{
money_in_use += o.amount;
}
uint64_t h = get_block_height(b);
//once a day, without
if(h && !(h%CURRENCY_DONATIONS_INTERVAL) /*&& h > 21600*/)
{
bool r = lookfor_donation(b.miner_tx, donation, royalty);
CHECK_AND_ASSERT_MES(r, false, "Failed to lookfor_donation");
r = validate_donations_value(donation, royalty);
CHECK_AND_ASSERT_MES(r, false, "Failed to validate donations value");
money_in_use -= donation + royalty;
}
std::vector<size_t> last_blocks_sizes;
get_last_n_blocks_sizes(last_blocks_sizes, CURRENCY_REWARD_BLOCKS_WINDOW);
uint64_t max_donation = 0;
if(!get_block_reward(misc_utils::median(last_blocks_sizes), cumulative_block_size, already_generated_coins, already_donated_coins, base_reward, max_donation))
{
LOG_PRINT_L0("block size " << cumulative_block_size << " is bigger than allowed for this blockchain");
return false;
}
if(base_reward + fee < money_in_use)
{
LOG_ERROR("coinbase transaction spend too much money (" << print_money(money_in_use) << "). Block reward is " << print_money(base_reward + fee) << "(" << print_money(base_reward) << "+" << print_money(fee) << ")");
return false;
}
if(base_reward + fee != money_in_use)
{
LOG_ERROR("coinbase transaction doesn't use full amount of block reward: spent: "
<< print_money(money_in_use) << ", block reward " << print_money(base_reward + fee) << "(" << print_money(base_reward) << "+" << print_money(fee) << ")");
return false;
}
donation_total = royalty + donation;
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::get_backward_blocks_sizes(size_t from_height, std::vector<size_t>& sz, size_t count)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
CHECK_AND_ASSERT_MES(from_height < m_blocks.size(), false, "Internal error: get_backward_blocks_sizes called with from_height=" << from_height << ", blockchain height = " << m_blocks.size());
size_t start_offset = (from_height+1) - std::min((from_height+1), count);
for(size_t i = start_offset; i != from_height+1; i++)
sz.push_back(m_blocks[i].block_cumulative_size);
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::get_last_n_blocks_sizes(std::vector<size_t>& sz, size_t count)
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
if(!m_blocks.size())
return true;
return get_backward_blocks_sizes(m_blocks.size() -1, sz, count);
}
//------------------------------------------------------------------
uint64_t blockchain_storage::get_current_comulative_blocksize_limit()
{
return m_current_block_cumul_sz_limit;
}
//------------------------------------------------------------------
bool blockchain_storage::create_block_template(block& b, const account_public_address& miner_address, wide_difficulty_type& diffic, uint64_t& height, const blobdata& ex_nonce, bool vote_for_donation, const alias_info& ai)
{
size_t median_size;
uint64_t already_generated_coins;
uint64_t already_donated_coins;
uint64_t donation_amount_for_this_block = 0;
CRITICAL_REGION_BEGIN(m_blockchain_lock);
b.major_version = CURRENT_BLOCK_MAJOR_VERSION;
b.minor_version = CURRENT_BLOCK_MINOR_VERSION;
b.prev_id = get_top_block_id();
b.timestamp = time(NULL);
b.flags = 0;
if(!vote_for_donation)
b.flags = BLOCK_FLAGS_SUPPRESS_DONATION;
height = m_blocks.size();
diffic = get_difficulty_for_next_block();
if(!(height%CURRENCY_DONATIONS_INTERVAL))
get_required_donations_value_for_next_block(donation_amount_for_this_block);
CHECK_AND_ASSERT_MES(diffic, false, "difficulty owverhead.");
median_size = m_current_block_cumul_sz_limit / 2;
already_generated_coins = m_blocks.back().already_generated_coins;
already_donated_coins = m_blocks.back().already_donated_coins;
CRITICAL_REGION_END();
size_t txs_size;
uint64_t fee;
if (!m_tx_pool.fill_block_template(b, median_size, already_generated_coins, already_donated_coins, txs_size, fee)) {
return false;
}
/*
two-phase miner transaction generation: we don't know exact block size until we prepare block, but we don't know reward until we know
block size, so first miner transaction generated with fake amount of money, and with phase we know think we know expected block size
*/
//make blocks coin-base tx looks close to real coinbase tx to get truthful blob size
bool r = construct_miner_tx(height, median_size, already_generated_coins, already_donated_coins,
txs_size,
fee,
miner_address,
m_donations_account.m_account_address,
m_royalty_account.m_account_address,
b.miner_tx, ex_nonce,
11, donation_amount_for_this_block, ai);
CHECK_AND_ASSERT_MES(r, false, "Failed to construc miner tx, first chance");
#ifdef _DEBUG
std::list<size_t> try_val;
try_val.push_back(get_object_blobsize(b.miner_tx));
#endif
size_t cumulative_size = txs_size + get_object_blobsize(b.miner_tx);
for (size_t try_count = 0; try_count != 10; ++try_count) {
r = construct_miner_tx(height, median_size, already_generated_coins, already_donated_coins,
cumulative_size,
fee,
miner_address,
m_donations_account.m_account_address,
m_royalty_account.m_account_address,
b.miner_tx, ex_nonce,
11,
donation_amount_for_this_block, ai);
#ifdef _DEBUG
try_val.push_back(get_object_blobsize(b.miner_tx));
#endif
CHECK_AND_ASSERT_MES(r, false, "Failed to construc miner tx, second chance");
size_t coinbase_blob_size = get_object_blobsize(b.miner_tx);
if (coinbase_blob_size > cumulative_size - txs_size) {
cumulative_size = txs_size + coinbase_blob_size;
continue;
}
if (coinbase_blob_size < cumulative_size - txs_size) {
size_t delta = cumulative_size - txs_size - coinbase_blob_size;
b.miner_tx.extra.insert(b.miner_tx.extra.end(), delta, 0);
//here could be 1 byte difference, because of extra field counter is varint, and it can become from 1-byte len to 2-bytes len.
if (cumulative_size != txs_size + get_object_blobsize(b.miner_tx)) {
CHECK_AND_ASSERT_MES(cumulative_size + 1 == txs_size + get_object_blobsize(b.miner_tx), false, "unexpected case: cumulative_size=" << cumulative_size << " + 1 is not equal txs_cumulative_size=" << txs_size << " + get_object_blobsize(b.miner_tx)=" << get_object_blobsize(b.miner_tx));
b.miner_tx.extra.resize(b.miner_tx.extra.size() - 1);
if (cumulative_size != txs_size + get_object_blobsize(b.miner_tx)) {
//fuck, not lucky, -1 makes varint-counter size smaller, in that case we continue to grow with cumulative_size
LOG_PRINT_RED("Miner tx creation have no luck with delta_extra size = " << delta << " and " << delta - 1 , LOG_LEVEL_2);
cumulative_size += delta - 1;
continue;
}
LOG_PRINT_GREEN("Setting extra for block: " << b.miner_tx.extra.size() << ", try_count=" << try_count, LOG_LEVEL_1);
}
}
CHECK_AND_ASSERT_MES(cumulative_size == txs_size + get_object_blobsize(b.miner_tx), false, "unexpected case: cumulative_size=" << cumulative_size << " is not equal txs_cumulative_size=" << txs_size << " + get_object_blobsize(b.miner_tx)=" << get_object_blobsize(b.miner_tx));
return true;
}
LOG_ERROR("Failed to create_block_template with " << 10 << " tries");
return false;
}
//------------------------------------------------------------------
bool blockchain_storage::print_transactions_statistics()
{
CRITICAL_REGION_LOCAL(m_blockchain_lock);
LOG_PRINT_L0("Started to collect transaction statistics, pleas wait...");
size_t total_count = 0;
size_t coinbase_count = 0;
size_t total_full_blob = 0;
size_t total_cropped_blob = 0;
for(auto tx_entry: m_transactions)
{
++total_count;
if(is_coinbase(tx_entry.second.tx))
++coinbase_count;
else
{
total_full_blob += get_object_blobsize<transaction>(tx_entry.second.tx);
transaction tx = tx_entry.second.tx;
tx.signatures.clear();
total_cropped_blob += get_object_blobsize<transaction>(tx);
}
}
LOG_PRINT_L0("Done" << ENDL
<< "total transactions: " << total_count << ENDL
<< "coinbase transactions: " << coinbase_count << ENDL
<< "avarage size of transaction: " << total_full_blob/(total_count-coinbase_count) << ENDL
<< "avarage size of transaction without ring signatures: " << total_cropped_blob/(total_count-coinbase_count) << ENDL
);
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::complete_timestamps_vector(uint64_t start_top_height, std::vector<uint64_t>& timestamps)
{
if(timestamps.size() >= BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW)
return true;
CRITICAL_REGION_LOCAL(m_blockchain_lock);
size_t need_elements = BLOCKCHAIN_TIMESTAMP_CHECK_WINDOW - timestamps.size();
CHECK_AND_ASSERT_MES(start_top_height < m_blocks.size(), false, "internal error: passed start_height = " << start_top_height << " not less then m_blocks.size()=" << m_blocks.size());
size_t stop_offset = start_top_height > need_elements ? start_top_height - need_elements:0;
do
{
timestamps.push_back(m_blocks[start_top_height].bl.timestamp);
if(start_top_height == 0)
break;
--start_top_height;
}while(start_top_height != stop_offset);
return true;
}
//------------------------------------------------------------------
bool blockchain_storage::handle_alternative_block(const block& b, const crypto::hash& id, block_verification_context& bvc)
{
if(m_checkpoints.is_height_passed_zone(get_block_height(b), get_current_blockchain_height()-1))
{
LOG_PRINT_RED_L0("Block with id: " << id << ENDL << " for alternative chain, is under checkpoint zone, declined");
bvc.m_verifivation_failed = true;
return false;
}
TRY_ENTRY();
CRITICAL_REGION_LOCAL(m_blockchain_lock);
//block is not related with head of main chain
//first of all - look in alternative chains container
auto it_main_prev = m_blocks_index.find(b.prev_id);
auto it_prev = m_alternative_chains.find(b.prev_id);
if(it_prev != m_alternative_chains.end() || it_main_prev != m_blocks_index.end())
{
//we have new block in alternative chain
//build alternative subchain, front -> mainchain, back -> alternative head
blocks_ext_by_hash::iterator alt_it = it_prev; //m_alternative_chains.find()
std::list<blocks_ext_by_hash::iterator> alt_chain;
std::vector<crypto::hash> alt_scratchppad;
std::map<uint64_t, crypto::hash> alt_scratchppad_patch;
std::vector<uint64_t> timestamps;
while(alt_it != m_alternative_chains.end())
{
alt_chain.push_front(alt_it);
timestamps.push_back(alt_it->second.bl.timestamp);
alt_it = m_alternative_chains.find(alt_it->second.bl.prev_id);
}
if(alt_chain.size())
{
//make sure that it has right connection to main chain
CHECK_AND_ASSERT_MES(m_blocks.size() > alt_chain.front()->second.height, false, "main blockchain wrong height");
crypto::hash h = null_hash;
get_block_hash(m_blocks[alt_chain.front()->second.height - 1].bl, h);
CHECK_AND_ASSERT_MES(h == alt_chain.front()->second.bl.prev_id, false, "alternative chain have wrong connection to main chain");
complete_timestamps_vector(alt_chain.front()->second.height - 1, timestamps);
//build alternative scratchpad
for(auto& ach: alt_chain)
{
if(!push_block_scratchpad_data(ach->second.scratch_offset, ach->second.bl, alt_scratchppad, alt_scratchppad_patch))
{
LOG_PRINT_RED_L0("Block with id: " << id
<< ENDL << " for alternative chain, have invalid data");
bvc.m_verifivation_failed = true;
return false;
}
}
}else
{
CHECK_AND_ASSERT_MES(it_main_prev != m_blocks_index.end(), false, "internal error: broken imperative condition it_main_prev != m_blocks_index.end()");
complete_timestamps_vector(it_main_prev->second, timestamps);
}
//check timestamp correct
if(!check_block_timestamp(timestamps, b))
{
LOG_PRINT_RED_L0("Block with id: " << id
<< ENDL << " for alternative chain, have invalid timestamp: " << b.timestamp);
//add_block_as_invalid(b, id);//do not add blocks to invalid storage before proof of work check was passed
bvc.m_verifivation_failed = true;
return false;
}
block_extended_info bei = boost::value_initialized<block_extended_info>();