/
consensus.go
1060 lines (957 loc) · 30.3 KB
/
consensus.go
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
package datong
import (
"bytes"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"github.com/FusionFoundation/efsn/v4/consensus/misc"
"math/big"
"sort"
"sync"
"time"
"github.com/FusionFoundation/efsn/v4/accounts"
"github.com/FusionFoundation/efsn/v4/common"
"github.com/FusionFoundation/efsn/v4/common/hexutil"
cmath "github.com/FusionFoundation/efsn/v4/common/math"
"github.com/FusionFoundation/efsn/v4/consensus"
"github.com/FusionFoundation/efsn/v4/core/rawdb"
"github.com/FusionFoundation/efsn/v4/core/state"
"github.com/FusionFoundation/efsn/v4/core/types"
"github.com/FusionFoundation/efsn/v4/crypto"
"github.com/FusionFoundation/efsn/v4/ethdb"
"github.com/FusionFoundation/efsn/v4/log"
"github.com/FusionFoundation/efsn/v4/params"
"github.com/FusionFoundation/efsn/v4/rlp"
"github.com/FusionFoundation/efsn/v4/rpc"
"github.com/FusionFoundation/efsn/v4/trie"
"golang.org/x/crypto/sha3"
)
const (
delayTimeModifier = 15 // adjust factor
adjustIntervalBlocks = 10 // adjust delay time by blocks
maxNumberOfDeletedTickets = 7 // maximum number of tickets to be deleted because not mining block in time
)
var (
errUnknownBlock = errors.New("unknown block")
errCoinbase = errors.New("error coinbase")
errMissingVanity = errors.New("extra-data 32 byte vanity prefix missing")
errMissingSignature = errors.New("extra-data 65 byte suffix signature missing")
errUnauthorized = errors.New("unauthorized")
ErrNoTicket = errors.New("Miner doesn't have ticket")
)
// SignerFn is a signer callback function to request a hash to be signed by a
// backing account.
type SignerFn func(accounts.Account, string, []byte) ([]byte, error)
var (
extraVanity = 32
extraSeal = 65
MinBlockTime uint64 = 7 // 7 seconds
maxBlockTime uint64 = 600 // 10 minutes
)
// DaTong wacom
type DaTong struct {
config *params.DaTongConfig
db ethdb.Database
stateCache state.Database
signer common.Address
signFn SignerFn
lock sync.RWMutex
}
// New wacom
func New(config *params.DaTongConfig, db ethdb.Database) *DaTong {
return &DaTong{
config: config,
db: db,
stateCache: nil,
}
}
// Authorize wacom
func (dt *DaTong) Authorize(signer common.Address, signFn SignerFn) {
dt.lock.Lock()
defer dt.lock.Unlock()
dt.signer = signer
dt.signFn = signFn
}
// Author retrieves the Ethereum address of the account that minted the given
// block, which may be different from the header's coinbase if a consensus
// engine is based on signatures.
func (dt *DaTong) Author(header *types.Header) (common.Address, error) {
return header.Coinbase, nil
}
func VerifySignature(header *types.Header) error {
signature := header.Extra[len(header.Extra)-extraSeal:]
pubkey, err := crypto.Ecrecover(sigHash(header), signature)
if err != nil {
return err
}
var signer common.Address
copy(signer[:], crypto.Keccak256(pubkey[1:])[12:])
if header.Coinbase != signer {
return errors.New("Coinbase is not the signer")
}
return nil
}
// VerifyHeader checks whether a header conforms to the consensus rules of the
// stock Ethereum ethash engine.
func (dt *DaTong) verifyHeader(chain consensus.ChainReader, header *types.Header, seal bool, parents []*types.Header) error {
if header.Number == nil || header.Number.Sign() == 0 {
return errUnknownBlock
}
// Checkpoint blocks need to enforce zero beneficiary
if header.Coinbase == (common.Address{}) {
return errCoinbase
}
if len(header.Extra) < extraVanity {
return errMissingVanity
}
if len(header.Extra) < extraVanity+extraSeal {
return errMissingSignature
}
// Don't waste time checking blocks from the future
if header.Time > uint64(time.Now().Unix()) {
return consensus.ErrFutureBlock
}
// verify Ancestor
parent, err := getParent(chain, header, parents)
if err != nil {
return err
}
// Verify that the gas limit is <= 2^63-1
cap := uint64(0x7fffffffffffffff)
if header.GasLimit > cap {
return fmt.Errorf("invalid gasLimit: have %v, max %v", header.GasLimit, cap)
}
// Verify that the gasUsed is <= gasLimit
if header.GasUsed > header.GasLimit {
return fmt.Errorf("invalid gasUsed: have %d, gasLimit %d", header.GasUsed, header.GasLimit)
}
// Verify the block's gas usage and (if applicable) verify the base fee.
if !chain.Config().IsLondon(header.Number) {
// Verify BaseFee not present before EIP-1559 fork.
if header.BaseFee != nil {
return fmt.Errorf("invalid baseFee before fork: have %d, expected 'nil'", header.BaseFee)
}
if err := misc.VerifyGaslimit(parent.GasLimit, header.GasLimit); err != nil {
return err
}
} else if err := misc.VerifyEip1559Header(chain.Config(), parent, header); err != nil {
// Verify the header's EIP-1559 attributes.
return err
}
// Verify that the block number is parent's +1
if diff := new(big.Int).Sub(header.Number, parent.Number); diff.Cmp(big.NewInt(1)) != 0 {
return consensus.ErrInvalidNumber
}
// verify pos hash
if common.GetPoSHashVersion(header.Number) < common.PosV2 {
if header.UncleHash != types.EmptyUncleHash {
return fmt.Errorf("non empty uncle hash")
}
} else if header.UncleHash != posHash(parent) {
return fmt.Errorf("PoS hash mismatch: have %x, want %x", header.UncleHash, posHash(parent))
}
// verify header time
if header.Time-parent.Time < MinBlockTime {
return fmt.Errorf("block %v header.Time:%v < parent.Time:%v + %v Second",
header.Number, header.Time, parent.Time, MinBlockTime)
}
// verify signature
if err := VerifySignature(header); err != nil {
return err
}
// check block time
if err = dt.checkBlockTime(chain, header, parent); err != nil {
return err
}
if isInRange, err := CheckPoint(chain.Config().ChainID, header.Number.Uint64(), header.Hash()); isInRange {
if err == nil {
selected, retreat, err := dt.getSelectedAndRetreatedTickets(chain, header, parent)
if err != nil {
return err
}
// assign selected and retreated tickets (used in Finalize)
header.SetSelectedTicket(selected)
header.SetRetreatTickets(retreat)
}
return err
}
return dt.verifySeal(chain, header, parent)
}
// VerifyHeader checks whether a header conforms to the consensus rules of the
// stock Ethereum ethash engine.
func (dt *DaTong) VerifyHeader(chain consensus.ChainReader, header *types.Header, seal bool) error {
return dt.verifyHeader(chain, header, seal, glb_parents)
}
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
// concurrently. The method returns a quit channel to abort the operations and
// a results channel to retrieve the async verifications.
func (dt *DaTong) VerifyHeaders(chain consensus.ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) {
abort := make(chan struct{})
results := make(chan error, len(headers))
go func() {
for i, header := range headers {
err := dt.verifyHeader(chain, header, seals[i], headers[:i])
select {
case <-abort:
return
case results <- err:
}
}
}()
return abort, results
}
// VerifyUncles verifies that the given block's uncles conform to the consensus
// rules of the stock Ethereum ethash engine.
func (dt *DaTong) VerifyUncles(chain consensus.ChainReader, block *types.Block) error {
return nil
}
// VerifySeal implements consensus.Engine, checking whether the signature contained
// in the header satisfies the consensus protocol requirements.
func (c *DaTong) VerifySeal(chain consensus.ChainReader, header *types.Header) error {
return c.verifySeal(chain, header, nil)
}
var glb_parents []*types.Header
func SetHeaders(parents []*types.Header) {
glb_parents = parents
}
func getParent(chain consensus.ChainReader, header *types.Header, parents []*types.Header) (*types.Header, error) {
number := header.Number.Uint64()
var parent *types.Header
if parents != nil && len(parents) > 0 {
parent = parents[len(parents)-1]
} else {
parent = chain.GetHeader(header.ParentHash, number-1)
}
if parent == nil || parent.Number.Uint64() != number-1 || parent.Hash() != header.ParentHash {
return nil, consensus.ErrUnknownAncestor
}
return parent, nil
}
// VerifySeal checks whether the crypto seal on a header is valid according to
// the consensus rules of the given engine.
func (dt *DaTong) verifySeal(chain consensus.ChainReader, header *types.Header, parent *types.Header) error {
// verify ticket
snap, err := NewSnapshotFromHeader(header)
if err != nil {
return err
}
// verify ticket: list squence, ID , ticket Info, difficulty
diff, tk, listSq, retreat, errv := dt.calcBlockDifficulty(chain, header, parent)
if errv != nil {
return errv
}
// verify ticket with signer
if tk.Owner != header.Coinbase {
return errors.New("Coinbase is not the voted ticket owner")
}
// check ticket ID
if tk.ID != snap.Selected {
return fmt.Errorf("verifySeal ticketID mismatch, have %v, want %v", snap.Selected.String(), tk.ID.String())
}
if common.IsHeaderSnapCheckingEnabled(header.Number) {
// check retreat tickets
if len(retreat) != len(snap.Retreat) {
return fmt.Errorf("verifySeal retreat tickets count mismatch")
}
for i := 0; i < len(retreat); i++ {
if retreat[i].ID != snap.Retreat[i] {
return fmt.Errorf("verifySeal retreat tickets mismatch")
}
}
}
// check ticket info
errt := dt.checkTicketInfo(header, tk)
if errt != nil {
return errt
}
// check ticket order
if header.Nonce != types.EncodeNonce(listSq) {
return fmt.Errorf("verifySeal ticket order mismatch, have %v, want %v", header.Nonce.Uint64(), listSq)
}
// check difficulty
if diff.Cmp(header.Difficulty) != 0 {
return fmt.Errorf("verifySeal difficulty mismatch, have %v, want %v", header.Difficulty, diff)
}
return nil
}
// Prepare initializes the consensus fields of a block header according to the
// rules of a particular engine. The changes are executed inline.
func (dt *DaTong) Prepare(chain consensus.ChainReader, header *types.Header) error {
number := header.Number.Uint64()
parent := chain.GetHeader(header.ParentHash, number-1)
if parent == nil {
return consensus.ErrUnknownAncestor
}
if len(header.Extra) < extraVanity {
header.Extra = append(header.Extra, bytes.Repeat([]byte{0x00}, extraVanity-len(header.Extra))...)
}
header.Extra = header.Extra[:extraVanity]
header.Extra = append(header.Extra, make([]byte, extraSeal)...)
if common.GetPoSHashVersion(header.Number) < common.PosV2 {
header.UncleHash = types.EmptyUncleHash
} else {
header.UncleHash = posHash(parent)
}
difficulty, _, order, _, err := dt.calcBlockDifficulty(chain, header, parent)
if err != nil {
return err
}
header.Nonce = types.EncodeNonce(order)
header.Difficulty = difficulty
// adjust block time if illegal
if order > 0 {
recvTime := header.Time - parent.Time
maxDelaySeconds := maxBlockTime + dt.config.Period
if recvTime < maxDelaySeconds {
expectTime := dt.config.Period + order*delayTimeModifier
if recvTime < expectTime {
if expectTime > maxDelaySeconds {
expectTime = maxDelaySeconds
}
header.Time = parent.Time + expectTime
}
}
}
return nil
}
type DisInfo struct {
tk *common.Ticket
res *big.Int
}
type DistanceSlice []*DisInfo
func (s DistanceSlice) Len() int {
return len(s)
}
func (s DistanceSlice) Less(i, j int) bool {
return s[i].res.Cmp(s[j].res) < 0
}
func (s DistanceSlice) Swap(i, j int) {
s[i], s[j] = s[j], s[i]
}
// Finalize runs any post-transaction state modifications (e.g. block rewards)
// and assembles the final block.
// Note: The block header and state database might be updated to reflect any
// consensus rules that happen at finalization (e.g. block rewards).
func (dt *DaTong) Finalize(chain consensus.ChainReader, header *types.Header, statedb *state.StateDB, txs []*types.Transaction,
uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error) {
parent, err := getParent(chain, header, glb_parents)
if err != nil {
return nil, err
}
selected := header.GetSelectedTicket()
retreat := header.GetRetreatTickets()
if selected == nil {
log.Warn("Finalize shouldn't calc difficulty, as it's done in VerifyHeader or Prepare")
common.DebugCall(func() {
panic("Finalize shouldn't calc difficulty, as it's done in VerifyHeader or Prepare")
})
_, selected, _, retreat, err = dt.calcBlockDifficulty(chain, header, parent)
if err != nil {
return nil, err
}
}
snap := newSnapshot()
isInMining := header.MixDigest == (common.Hash{})
//update tickets
headerState := statedb
tickets, err := headerState.AllTickets()
if err != nil {
return nil, err
}
numTickets := tickets.NumberOfTickets()
if numTickets <= 1 {
log.Warn("Next block doesn't have ticket, wait buy ticket")
return nil, errors.New("Next block doesn't have ticket, wait buy ticket")
}
returnTicket := func(ticket *common.Ticket) {
if ticket.ExpireTime <= header.Time {
return
}
value := common.NewTimeLock(&common.TimeLockItem{
StartTime: ticket.StartTime,
EndTime: ticket.ExpireTime,
Value: ticket.Value(),
})
headerState.AddTimeLockBalance(ticket.Owner, common.SystemAssetID, value, header.Number, header.Time)
}
deleteTicket := func(ticket *common.Ticket, logType ticketLogType, returnBack bool) {
id := ticket.ID
headerState.RemoveTicket(id)
snap.AddLog(&ticketLog{
TicketID: id,
Type: logType,
})
if returnBack {
returnTicket(ticket)
}
}
deleteTicket(selected, ticketSelect, !selected.IsInGenesis())
//delete tickets before coinbase if selected miner did not Seal
for i, t := range retreat {
if !isInMining && i == 0 {
common.DebugInfo("retreat ticket", "nonce", header.Nonce.Uint64(), "id", retreat[0].ID.String(), "owner", retreat[0].Owner, "blockHeight", header.Number, "ticketHeight", retreat[0].Height)
}
deleteTicket(t, ticketRetreat, !(t.IsInGenesis() || i == 0))
}
if common.IsVote1ForkBlock(header.Number) {
ApplyVote1HardFork(headerState, header.Number, parent.Time)
}
hash, err := headerState.UpdateTickets(header.Number, parent.Time)
if err != nil {
return nil, errors.New("UpdateTickets failed: " + err.Error())
}
snap.SetTicketNumber(int(headerState.TotalNumberOfTickets()))
snapBytes := snap.Bytes()
if isInMining {
header.MixDigest = hash
header.Extra = header.Extra[:extraVanity]
header.Extra = append(header.Extra, snapBytes...)
header.Extra = append(header.Extra, make([]byte, extraSeal)...)
} else {
if header.MixDigest != hash {
return nil, fmt.Errorf("MixDigest mismatch, have:%v, want:%v, header:%v", header.MixDigest.String(), hash.String(), header.Number)
}
if common.IsHeaderSnapCheckingEnabled(header.Number) {
if !bytes.Equal(getSnapData(header.Extra), snapBytes) {
return nil, fmt.Errorf("snapBytes in Extra mismatch")
}
}
}
headerState.AddBalance(header.Coinbase, common.SystemAssetID, CalcRewards(header.Number))
header.Root = headerState.IntermediateRoot(chain.Config().IsEIP158(header.Number))
return types.NewBlock(header, txs, nil, receipts, trie.NewStackTrie(nil)), nil
}
// Seal generates a new sealing request for the given input block and pushes
// the result into the given channel.
//
// Note, the method returns immediately and will send the result async. More
// than one result may also be returned depending on the consensus algorothm.
func (dt *DaTong) Seal(chain consensus.ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error {
header := block.Header()
number := header.Number.Uint64()
if number == 0 {
return errUnknownBlock
}
dt.lock.RLock()
signer, signFn := dt.signer, dt.signFn
dt.lock.RUnlock()
if signer != header.Coinbase {
return errors.New("Mismatched Signer and Coinbase")
}
// delay time decide block time
delay, errc := dt.calcDelayTime(chain, header)
if errc != nil {
return errc
}
sighash, err := signFn(accounts.Account{Address: header.Coinbase}, "", sigRlp(header))
if err != nil {
return err
}
copy(header.Extra[len(header.Extra)-extraSeal:], sighash)
go func() {
select {
case <-stop:
return
case <-time.After(delay):
}
select {
case results <- block.WithSeal(header):
default:
log.Warn("Sealing result is not read by miner", "sealhash", dt.SealHash(header))
}
}()
return nil
}
// SealHash returns the hash of a block prior to it being sealed.
func (dt *DaTong) SealHash(header *types.Header) (hash common.Hash) {
hasher := sha3.NewLegacyKeccak256()
enc := []interface{}{
header.ParentHash,
header.UncleHash,
header.Coinbase,
header.Root,
header.TxHash,
header.ReceiptHash,
header.Bloom,
header.Difficulty,
header.Number,
header.GasLimit,
header.GasUsed,
header.Extra[:extraVanity],
header.MixDigest,
header.Nonce,
}
if header.BaseFee != nil {
enc = append(enc, header.BaseFee)
}
rlp.Encode(hasher, enc)
hasher.Sum(hash[:0])
return hash
}
// CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty
// that a new block should have.
func (dt *DaTong) CalcDifficulty(chain consensus.ChainReader, time uint64, parent *types.Header) *big.Int {
return nil
}
// APIs returns the RPC APIs this consensus engine provides.
func (dt *DaTong) APIs(chain consensus.ChainReader) []rpc.API {
return []rpc.API{{
Namespace: "fsn",
Version: "1.0",
Service: &API{chain: chain},
Public: false,
}}
}
// Close terminates any background threads maintained by the consensus engine.
func (dt *DaTong) Close() error {
return nil
}
func (dt *DaTong) getAllTickets(chain consensus.ChainReader, header *types.Header) (common.TicketsDataSlice, error) {
if ts := state.GetCachedTickets(header.MixDigest); ts != nil {
return ts, nil
}
statedb, err := state.New(header.Root, header.MixDigest, dt.stateCache)
if err == nil {
return statedb.AllTickets()
} else if header.Number.Uint64() == 0 {
return nil, err
}
// get tickets from past state
var tickets common.TicketsDataSlice
parent := header
parents := []*types.Header{parent}
for {
if parent = chain.GetHeader(parent.ParentHash, parent.Number.Uint64()-1); parent == nil {
return nil, fmt.Errorf("Can not find parent, number=%v, hash=%v", parent.Number.Uint64()-1, parent.ParentHash.String())
}
statedb, err = state.New(parent.Root, parent.MixDigest, dt.stateCache)
if err == nil {
if tickets, err = statedb.AllTickets(); err != nil {
return nil, err
}
break
} else if parent.Number.Uint64() == 0 {
return nil, err
}
parents = append(parents, parent)
}
log.Info("getAllTickets find tickets from past state", "current", header.Number, "past", parent.Number)
defer func(bstart time.Time) {
common.DebugInfo("getAllTickets from past state spend time", "duration", common.PrettyDuration(time.Since(bstart)))
}(time.Now())
// deduct the current tickets
getFuncType := func(l *types.Log) uint8 {
switch l.Address {
case common.FSNCallAddress:
if len(l.Topics) > 0 {
topic := l.Topics[0]
return topic[common.HashLength-1]
}
}
return 0xff
}
processBuyTicketLog := func(l *types.Log) error {
maps := make(map[string]interface{})
err := json.Unmarshal(l.Data, &maps)
if err != nil {
return err
}
if _, hasError := maps["Error"]; hasError {
return nil
}
idstr, idok := maps["TicketID"].(string)
ownerstr, ownerok := maps["TicketOwner"].(string)
datastr, dataok := maps["Base"].(string)
if !idok || !ownerok || !dataok {
return errors.New("buy ticket log has wrong data")
}
data, err := base64.StdEncoding.DecodeString(datastr)
if err != nil {
return err
}
buyTicketParam := common.BuyTicketParam{}
rlp.DecodeBytes(data, &buyTicketParam)
ticket := &common.Ticket{
Owner: common.HexToAddress(ownerstr),
TicketBody: common.TicketBody{
ID: common.HexToHash(idstr),
Height: l.BlockNumber,
StartTime: buyTicketParam.Start,
ExpireTime: buyTicketParam.End,
},
}
tickets, err = tickets.AddTicket(ticket)
return err
}
processReportLog := func(l *types.Log) error {
maps := make(map[string]interface{})
err := json.Unmarshal(l.Data, &maps)
if err != nil {
return err
}
if _, hasError := maps["Error"]; hasError {
return nil
}
ids, idsok := maps["DeleteTickets"].(string)
if !idsok {
return fmt.Errorf("report log has wrong data")
}
bs, err := hexutil.Decode(ids)
if err != nil {
return fmt.Errorf("decode hex data error: %v", err)
}
delTickets := []common.Hash{}
if err := rlp.DecodeBytes(bs, &delTickets); err != nil {
return fmt.Errorf("decode report log error: %v", err)
}
for _, id := range delTickets {
tickets, err = tickets.RemoveTicket(id)
if err != nil {
return err
}
}
return nil
}
processLog := func(l *types.Log) error {
funcType := getFuncType(l)
switch funcType {
case common.BuyTicketFunc:
if err := processBuyTicketLog(l); err != nil {
return err
}
case common.ReportIllegalFunc:
if err := processReportLog(l); err != nil {
return err
}
}
return nil
}
processSnap := func(h *types.Header) error {
snap, err := NewSnapshotFromHeader(h)
if err != nil {
return err
}
tickets, err = tickets.RemoveTicket(snap.Selected)
if err != nil {
return err
}
for _, id := range snap.Retreat {
tickets, err = tickets.RemoveTicket(id)
if err != nil {
return err
}
}
return nil
}
for i := len(parents) - 1; i >= 0; i-- {
hash := parents[i].Hash()
if number := rawdb.ReadHeaderNumber(dt.db, hash); number != nil {
receipts := rawdb.ReadReceipts(dt.db, hash, *number, chain.Config())
for _, receipt := range receipts {
for _, log := range receipt.Logs {
if err := processLog(log); err != nil {
return nil, err
}
}
}
}
if err := processSnap(parents[i]); err != nil {
return nil, err
}
}
tickets, err = tickets.ClearExpiredTickets(header.Time)
if err != nil {
return nil, err
}
if err := state.AddCachedTickets(header.MixDigest, tickets); err != nil {
return nil, err
}
return tickets, nil
}
func sigRlp(header *types.Header) (result []byte) {
result, _ = rlp.EncodeToBytes([]interface{}{
header.ParentHash,
header.UncleHash,
header.Coinbase,
header.Root,
header.TxHash,
header.ReceiptHash,
header.Bloom,
header.Difficulty,
header.Number,
header.GasLimit,
header.GasUsed,
header.Time,
header.Extra[:len(header.Extra)-extraSeal],
header.MixDigest,
header.Nonce,
})
return
}
func sigHash(header *types.Header) (result []byte) {
return crypto.Keccak256(sigRlp(header))
}
func getSnapDataByHeader(header *types.Header) []byte {
return getSnapData(header.Extra)
}
func getSnapData(data []byte) []byte {
extraSuffix := len(data) - extraSeal
if extraSuffix < extraVanity {
return []byte{}
}
return data[extraVanity:extraSuffix]
}
func CalcRewards(height *big.Int) *big.Int {
var i int64
div2 := big.NewInt(2)
// initial reward 2.5
var reward = new(big.Int).Mul(big.NewInt(25), big.NewInt(100000000000000000))
// every 4915200 blocks divide reward by 2
segment := new(big.Int).Div(height, new(big.Int).SetUint64(4915200))
for i = 0; i < segment.Int64(); i++ {
reward = new(big.Int).Div(reward, div2)
}
return reward
}
// get rid of header.Extra[0:extraVanity] of user custom data
func posHash(header *types.Header) (hash common.Hash) {
hasher := sha3.NewLegacyKeccak256()
switch common.GetPoSHashVersion(header.Number) {
case common.PosV1:
rlp.Encode(hasher, []interface{}{
header.ParentHash,
header.UncleHash,
header.Coinbase,
header.Root,
header.TxHash,
header.ReceiptHash,
header.Bloom,
header.Difficulty,
header.Number,
header.GasLimit,
header.GasUsed,
header.Time,
header.Extra[extraVanity : len(header.Extra)-extraSeal],
header.MixDigest,
header.Nonce,
})
case common.PosV2:
rlp.Encode(hasher, []interface{}{
header.UncleHash,
header.Coinbase,
header.Difficulty,
header.Number,
(header.Time >> 5) << 5,
header.Extra[extraVanity : len(header.Extra)-extraSeal],
header.MixDigest,
header.Nonce,
})
case common.PosV3:
rlp.Encode(hasher, []interface{}{
header.UncleHash,
header.Coinbase,
header.Difficulty,
header.Number,
(header.Time >> 5) << 5,
header.Extra[extraVanity : len(header.Extra)-extraSeal],
header.Nonce,
})
}
hasher.Sum(hash[:0])
return hash
}
type DisInfoWithIndex struct {
index int
info *DisInfo
}
func calcDisInfo(ind int, tickets common.TicketsData, parent *types.Header, ch chan *DisInfoWithIndex) {
posHash := posHash(parent)
owner := tickets.Owner
var minTicket common.TicketBody
var minDist *big.Int
for _, t := range tickets.Tickets {
w := new(big.Int).SetUint64(parent.Number.Uint64() - t.Height + 1)
w2 := new(big.Int).Mul(w, w)
id := new(big.Int).SetBytes(crypto.Keccak256(posHash[:], t.ID[:], []byte(owner.Hex())))
id2 := new(big.Int).Mul(id, id)
s := new(big.Int).Add(w2, id2)
if minDist == nil || s.Cmp(minDist) < 0 {
minTicket = t
minDist = s
}
}
ticket := &common.Ticket{
Owner: owner,
TicketBody: minTicket,
}
result := &DisInfoWithIndex{index: ind, info: &DisInfo{tk: ticket, res: minDist}}
ch <- result
}
func (dt *DaTong) calcBlockDifficulty(chain consensus.ChainReader, header *types.Header, parent *types.Header) (*big.Int, *common.Ticket, uint64, common.TicketPtrSlice, error) {
if header.GetSelectedTicket() != nil {
return header.Difficulty, header.GetSelectedTicket(), header.Nonce.Uint64(), header.GetRetreatTickets(), nil
}
parentTickets, err := dt.getAllTickets(chain, parent)
if err != nil {
return nil, nil, 0, nil, err
}
haveTicket := false
for _, v := range parentTickets {
if v.Owner == header.Coinbase {
haveTicket = true
break
}
}
if !haveTicket {
return nil, nil, 0, nil, ErrNoTicket
}
ticketsTotalAmount, numberOfticketOwners := parentTickets.NumberOfTicketsAndOwners()
// calc balance before selected ticket from stored tickets list
var (
selected *common.Ticket
retreat common.TicketPtrSlice
)
// make consensus by tickets sequence(selectedTime) with: parentHash, weigth, ticketID, coinbase
ch := make(chan *DisInfoWithIndex, numberOfticketOwners)
list := make(DistanceSlice, numberOfticketOwners)
for k, v := range parentTickets {
go calcDisInfo(k, v, parent, ch)
}
for i := 0; i < int(numberOfticketOwners); i++ {
v := <-ch
list[v.index] = v.info
}
close(ch)
sort.Sort(list)
selectedTime := uint64(0)
for i, t := range list {
owner := t.tk.Owner
if owner == header.Coinbase {
selected = t.tk
break
} else {
selectedTime++
if i < maxNumberOfDeletedTickets {
retreat = append(retreat, t.tk) // one miner one selected ticket
}
}
}
if selected == nil {
return nil, nil, 0, nil, errors.New("myself tickets not selected in maxBlockTime")
}
// cacl difficulty
difficulty := new(big.Int).SetUint64(ticketsTotalAmount - selectedTime)
if selectedTime > 0 {
// base10 = base * 10 (base > 1)
base10 := int64(16)
// exponent = max(selectedTime, 50)
exponent := int64(selectedTime)
if exponent > 50 {
exponent = 50
}
// difficulty = ticketsTotal * pow(10, exponent) / pow(base10, exponent)
difficulty = new(big.Int).Div(
new(big.Int).Mul(difficulty, cmath.BigPow(10, exponent)),
cmath.BigPow(base10, exponent))
if difficulty.Cmp(common.Big1) < 0 {
difficulty = common.Big1
}
}
adjust := new(big.Int).SetUint64(numberOfticketOwners - selectedTime)
difficulty = new(big.Int).Add(difficulty, adjust)
header.SetSelectedTicket(selected)
header.SetRetreatTickets(retreat)
return difficulty, selected, selectedTime, retreat, nil
}
// PreProcess update state if needed from various block info
// used with some PoS Systems
func (c *DaTong) PreProcess(chain consensus.ChainReader, header *types.Header, statedb *state.StateDB) error {
return nil
}
func (dt *DaTong) calcDelayTime(chain consensus.ChainReader, header *types.Header) (time.Duration, error) {
list := header.Nonce.Uint64()
if list > 0 {
return time.Unix(int64(header.Time), 0).Sub(time.Now()), nil
}
// delayTime = ParentTime + (15 - 2) - time.Now
parent := chain.GetHeaderByNumber(header.Number.Uint64() - 1)
endTime := header.Time + list*delayTimeModifier + dt.config.Period - 2
delayTime := time.Unix(int64(endTime), 0).Sub(time.Now())
// delay maximum
if endTime-header.Time > maxBlockTime {
endTime = header.Time + maxBlockTime + dt.config.Period - 2 + list
delayTime = time.Unix(int64(endTime), 0).Sub(time.Now())
}
if header.Number.Uint64() > (adjustIntervalBlocks + 1) {
// adjust = ( ( parent - gparent ) / 2 - (dt.config.Period) ) / dt.config.Period
gparent := chain.GetHeaderByNumber(header.Number.Uint64() - 1 - adjustIntervalBlocks)
adjust := ((time.Unix(int64(parent.Time), 0).Sub(time.Unix(int64(gparent.Time), 0)) / adjustIntervalBlocks) -
time.Duration(int64(dt.config.Period))*time.Second) /
time.Duration(int64(adjustIntervalBlocks))
stampSecond := time.Duration(2) * time.Second
if adjust > stampSecond {
adjust = stampSecond
} else if adjust < -stampSecond {
adjust = -stampSecond
}
delayTime -= adjust
}
return delayTime, nil
}