-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
legacy_decoding.go
737 lines (610 loc) · 19.1 KB
/
legacy_decoding.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
package legacy
import (
"bytes"
"encoding/binary"
"errors"
"io"
lnwire "github.com/lightningnetwork/lnd/channeldb/migration/lnwire21"
"github.com/lightningnetwork/lnd/channeldb/migration21/common"
"github.com/lightningnetwork/lnd/kvdb"
)
func deserializeHtlcs(r io.Reader) ([]common.HTLC, error) {
var numHtlcs uint16
if err := ReadElement(r, &numHtlcs); err != nil {
return nil, err
}
var htlcs []common.HTLC
if numHtlcs == 0 {
return htlcs, nil
}
htlcs = make([]common.HTLC, numHtlcs)
for i := uint16(0); i < numHtlcs; i++ {
if err := ReadElements(r,
&htlcs[i].Signature, &htlcs[i].RHash, &htlcs[i].Amt,
&htlcs[i].RefundTimeout, &htlcs[i].OutputIndex,
&htlcs[i].Incoming, &htlcs[i].OnionBlob,
&htlcs[i].HtlcIndex, &htlcs[i].LogIndex,
); err != nil {
return htlcs, err
}
}
return htlcs, nil
}
func DeserializeLogUpdates(r io.Reader) ([]common.LogUpdate, error) {
var numUpdates uint16
if err := binary.Read(r, byteOrder, &numUpdates); err != nil {
return nil, err
}
logUpdates := make([]common.LogUpdate, numUpdates)
for i := 0; i < int(numUpdates); i++ {
err := ReadElements(r,
&logUpdates[i].LogIndex, &logUpdates[i].UpdateMsg,
)
if err != nil {
return nil, err
}
}
return logUpdates, nil
}
func deserializeChanCommit(r io.Reader) (common.ChannelCommitment, error) {
var c common.ChannelCommitment
err := ReadElements(r,
&c.CommitHeight, &c.LocalLogIndex, &c.LocalHtlcIndex, &c.RemoteLogIndex,
&c.RemoteHtlcIndex, &c.LocalBalance, &c.RemoteBalance,
&c.CommitFee, &c.FeePerKw, &c.CommitTx, &c.CommitSig,
)
if err != nil {
return c, err
}
c.Htlcs, err = deserializeHtlcs(r)
if err != nil {
return c, err
}
return c, nil
}
func DeserializeCommitDiff(r io.Reader) (*common.CommitDiff, error) {
var (
d common.CommitDiff
err error
)
d.Commitment, err = deserializeChanCommit(r)
if err != nil {
return nil, err
}
d.CommitSig = &lnwire.CommitSig{}
if err := d.CommitSig.Decode(r, 0); err != nil {
return nil, err
}
d.LogUpdates, err = DeserializeLogUpdates(r)
if err != nil {
return nil, err
}
var numOpenRefs uint16
if err := binary.Read(r, byteOrder, &numOpenRefs); err != nil {
return nil, err
}
d.OpenedCircuitKeys = make([]common.CircuitKey, numOpenRefs)
for i := 0; i < int(numOpenRefs); i++ {
err := ReadElements(r,
&d.OpenedCircuitKeys[i].ChanID,
&d.OpenedCircuitKeys[i].HtlcID)
if err != nil {
return nil, err
}
}
var numClosedRefs uint16
if err := binary.Read(r, byteOrder, &numClosedRefs); err != nil {
return nil, err
}
d.ClosedCircuitKeys = make([]common.CircuitKey, numClosedRefs)
for i := 0; i < int(numClosedRefs); i++ {
err := ReadElements(r,
&d.ClosedCircuitKeys[i].ChanID,
&d.ClosedCircuitKeys[i].HtlcID)
if err != nil {
return nil, err
}
}
return &d, nil
}
func serializeHtlcs(b io.Writer, htlcs ...common.HTLC) error {
numHtlcs := uint16(len(htlcs))
if err := WriteElement(b, numHtlcs); err != nil {
return err
}
for _, htlc := range htlcs {
if err := WriteElements(b,
htlc.Signature, htlc.RHash, htlc.Amt, htlc.RefundTimeout,
htlc.OutputIndex, htlc.Incoming, htlc.OnionBlob,
htlc.HtlcIndex, htlc.LogIndex,
); err != nil {
return err
}
}
return nil
}
func serializeChanCommit(w io.Writer, c *common.ChannelCommitment) error {
if err := WriteElements(w,
c.CommitHeight, c.LocalLogIndex, c.LocalHtlcIndex,
c.RemoteLogIndex, c.RemoteHtlcIndex, c.LocalBalance,
c.RemoteBalance, c.CommitFee, c.FeePerKw, c.CommitTx,
c.CommitSig,
); err != nil {
return err
}
return serializeHtlcs(w, c.Htlcs...)
}
func SerializeLogUpdates(w io.Writer, logUpdates []common.LogUpdate) error {
numUpdates := uint16(len(logUpdates))
if err := binary.Write(w, byteOrder, numUpdates); err != nil {
return err
}
for _, diff := range logUpdates {
err := WriteElements(w, diff.LogIndex, diff.UpdateMsg)
if err != nil {
return err
}
}
return nil
}
func SerializeCommitDiff(w io.Writer, diff *common.CommitDiff) error { // nolint: dupl
if err := serializeChanCommit(w, &diff.Commitment); err != nil {
return err
}
if err := diff.CommitSig.Encode(w, 0); err != nil {
return err
}
if err := SerializeLogUpdates(w, diff.LogUpdates); err != nil {
return err
}
numOpenRefs := uint16(len(diff.OpenedCircuitKeys))
if err := binary.Write(w, byteOrder, numOpenRefs); err != nil {
return err
}
for _, openRef := range diff.OpenedCircuitKeys {
err := WriteElements(w, openRef.ChanID, openRef.HtlcID)
if err != nil {
return err
}
}
numClosedRefs := uint16(len(diff.ClosedCircuitKeys))
if err := binary.Write(w, byteOrder, numClosedRefs); err != nil {
return err
}
for _, closedRef := range diff.ClosedCircuitKeys {
err := WriteElements(w, closedRef.ChanID, closedRef.HtlcID)
if err != nil {
return err
}
}
return nil
}
func DeserializeNetworkResult(r io.Reader) (*common.NetworkResult, error) {
var (
err error
)
n := &common.NetworkResult{}
n.Msg, err = lnwire.ReadMessage(r, 0)
if err != nil {
return nil, err
}
if err := ReadElements(r,
&n.Unencrypted, &n.IsResolution,
); err != nil {
return nil, err
}
return n, nil
}
func SerializeNetworkResult(w io.Writer, n *common.NetworkResult) error {
if _, err := lnwire.WriteMessage(w, n.Msg, 0); err != nil {
return err
}
return WriteElements(w, n.Unencrypted, n.IsResolution)
}
func readChanConfig(b io.Reader, c *common.ChannelConfig) error { // nolint: dupl
return ReadElements(b,
&c.DustLimit, &c.MaxPendingAmount, &c.ChanReserve,
&c.MinHTLC, &c.MaxAcceptedHtlcs, &c.CsvDelay,
&c.MultiSigKey, &c.RevocationBasePoint,
&c.PaymentBasePoint, &c.DelayBasePoint,
&c.HtlcBasePoint,
)
}
func DeserializeCloseChannelSummary(r io.Reader) (*common.ChannelCloseSummary, error) { // nolint: dupl
c := &common.ChannelCloseSummary{}
err := ReadElements(r,
&c.ChanPoint, &c.ShortChanID, &c.ChainHash, &c.ClosingTXID,
&c.CloseHeight, &c.RemotePub, &c.Capacity, &c.SettledBalance,
&c.TimeLockedBalance, &c.CloseType, &c.IsPending,
)
if err != nil {
return nil, err
}
// We'll now check to see if the channel close summary was encoded with
// any of the additional optional fields.
var hasNewFields bool
err = ReadElements(r, &hasNewFields)
if err != nil {
return nil, err
}
// If fields are not present, we can return.
if !hasNewFields {
return c, nil
}
// Otherwise read the new fields.
if err := ReadElements(r, &c.RemoteCurrentRevocation); err != nil {
return nil, err
}
if err := readChanConfig(r, &c.LocalChanConfig); err != nil {
return nil, err
}
// Finally, we'll attempt to read the next unrevoked commitment point
// for the remote party. If we closed the channel before receiving a
// funding locked message then this might not be present. A boolean
// indicating whether the field is present will come first.
var hasRemoteNextRevocation bool
err = ReadElements(r, &hasRemoteNextRevocation)
if err != nil {
return nil, err
}
// If this field was written, read it.
if hasRemoteNextRevocation {
err = ReadElements(r, &c.RemoteNextRevocation)
if err != nil {
return nil, err
}
}
// Check if we have a channel sync message to read.
var hasChanSyncMsg bool
err = ReadElements(r, &hasChanSyncMsg)
if err == io.EOF {
return c, nil
} else if err != nil {
return nil, err
}
// If a chan sync message is present, read it.
if hasChanSyncMsg {
// We must pass in reference to a lnwire.Message for the codec
// to support it.
msg, err := lnwire.ReadMessage(r, 0)
if err != nil {
return nil, err
}
chanSync, ok := msg.(*lnwire.ChannelReestablish)
if !ok {
return nil, errors.New("unable cast db Message to " +
"ChannelReestablish")
}
c.LastChanSyncMsg = chanSync
}
return c, nil
}
func writeChanConfig(b io.Writer, c *common.ChannelConfig) error { // nolint: dupl
return WriteElements(b,
c.DustLimit, c.MaxPendingAmount, c.ChanReserve, c.MinHTLC,
c.MaxAcceptedHtlcs, c.CsvDelay, c.MultiSigKey,
c.RevocationBasePoint, c.PaymentBasePoint, c.DelayBasePoint,
c.HtlcBasePoint,
)
}
func SerializeChannelCloseSummary(w io.Writer, cs *common.ChannelCloseSummary) error {
err := WriteElements(w,
cs.ChanPoint, cs.ShortChanID, cs.ChainHash, cs.ClosingTXID,
cs.CloseHeight, cs.RemotePub, cs.Capacity, cs.SettledBalance,
cs.TimeLockedBalance, cs.CloseType, cs.IsPending,
)
if err != nil {
return err
}
// If this is a close channel summary created before the addition of
// the new fields, then we can exit here.
if cs.RemoteCurrentRevocation == nil {
return WriteElements(w, false)
}
// If fields are present, write boolean to indicate this, and continue.
if err := WriteElements(w, true); err != nil {
return err
}
if err := WriteElements(w, cs.RemoteCurrentRevocation); err != nil {
return err
}
if err := writeChanConfig(w, &cs.LocalChanConfig); err != nil {
return err
}
// The RemoteNextRevocation field is optional, as it's possible for a
// channel to be closed before we learn of the next unrevoked
// revocation point for the remote party. Write a boolen indicating
// whether this field is present or not.
if err := WriteElements(w, cs.RemoteNextRevocation != nil); err != nil {
return err
}
// Write the field, if present.
if cs.RemoteNextRevocation != nil {
if err = WriteElements(w, cs.RemoteNextRevocation); err != nil {
return err
}
}
// Write whether the channel sync message is present.
if err := WriteElements(w, cs.LastChanSyncMsg != nil); err != nil {
return err
}
// Write the channel sync message, if present.
if cs.LastChanSyncMsg != nil {
_, err = lnwire.WriteMessage(w, cs.LastChanSyncMsg, 0)
if err != nil {
return err
}
}
return nil
}
// ErrCorruptedFwdPkg signals that the on-disk structure of the forwarding
// package has potentially been mangled.
var ErrCorruptedFwdPkg = errors.New("fwding package db has been corrupted")
var (
// fwdPackagesKey is the root-level bucket that all forwarding packages
// are written. This bucket is further subdivided based on the short
// channel ID of each channel.
fwdPackagesKey = []byte("fwd-packages")
// addBucketKey is the bucket to which all Add log updates are written.
addBucketKey = []byte("add-updates")
// failSettleBucketKey is the bucket to which all Settle/Fail log
// updates are written.
failSettleBucketKey = []byte("fail-settle-updates")
// fwdFilterKey is a key used to write the set of Adds that passed
// validation and are to be forwarded to the switch.
// NOTE: The presence of this key within a forwarding package indicates
// that the package has reached FwdStateProcessed.
fwdFilterKey = []byte("fwd-filter-key")
// ackFilterKey is a key used to access the PkgFilter indicating which
// Adds have received a Settle/Fail. This response may come from a
// number of sources, including: exitHop settle/fails, switch failures,
// chain arbiter interjections, as well as settle/fails from the
// next hop in the route.
ackFilterKey = []byte("ack-filter-key")
// settleFailFilterKey is a key used to access the PkgFilter indicating
// which Settles/Fails in have been received and processed by the link
// that originally received the Add.
settleFailFilterKey = []byte("settle-fail-filter-key")
)
func makeLogKey(updateNum uint64) [8]byte {
var key [8]byte
byteOrder.PutUint64(key[:], updateNum)
return key
}
// uint16Key writes the provided 16-bit unsigned integer to a 2-byte slice.
func uint16Key(i uint16) []byte {
key := make([]byte, 2)
byteOrder.PutUint16(key, i)
return key
}
// ChannelPackager is used by a channel to manage the lifecycle of its forwarding
// packages. The packager is tied to a particular source channel ID, allowing it
// to create and edit its own packages. Each packager also has the ability to
// remove fail/settle htlcs that correspond to an add contained in one of
// source's packages.
type ChannelPackager struct {
source lnwire.ShortChannelID
}
// NewChannelPackager creates a new packager for a single channel.
func NewChannelPackager(source lnwire.ShortChannelID) *ChannelPackager {
return &ChannelPackager{
source: source,
}
}
// AddFwdPkg writes a newly locked in forwarding package to disk.
func (*ChannelPackager) AddFwdPkg(tx kvdb.RwTx, fwdPkg *common.FwdPkg) error { // nolint: dupl
fwdPkgBkt, err := tx.CreateTopLevelBucket(fwdPackagesKey)
if err != nil {
return err
}
source := makeLogKey(fwdPkg.Source.ToUint64())
sourceBkt, err := fwdPkgBkt.CreateBucketIfNotExists(source[:])
if err != nil {
return err
}
heightKey := makeLogKey(fwdPkg.Height)
heightBkt, err := sourceBkt.CreateBucketIfNotExists(heightKey[:])
if err != nil {
return err
}
// Write ADD updates we received at this commit height.
addBkt, err := heightBkt.CreateBucketIfNotExists(addBucketKey)
if err != nil {
return err
}
// Write SETTLE/FAIL updates we received at this commit height.
failSettleBkt, err := heightBkt.CreateBucketIfNotExists(failSettleBucketKey)
if err != nil {
return err
}
for i := range fwdPkg.Adds {
err = putLogUpdate(addBkt, uint16(i), &fwdPkg.Adds[i])
if err != nil {
return err
}
}
// Persist the initialized pkg filter, which will be used to determine
// when we can remove this forwarding package from disk.
var ackFilterBuf bytes.Buffer
if err := fwdPkg.AckFilter.Encode(&ackFilterBuf); err != nil {
return err
}
if err := heightBkt.Put(ackFilterKey, ackFilterBuf.Bytes()); err != nil {
return err
}
for i := range fwdPkg.SettleFails {
err = putLogUpdate(failSettleBkt, uint16(i), &fwdPkg.SettleFails[i])
if err != nil {
return err
}
}
var settleFailFilterBuf bytes.Buffer
err = fwdPkg.SettleFailFilter.Encode(&settleFailFilterBuf)
if err != nil {
return err
}
return heightBkt.Put(settleFailFilterKey, settleFailFilterBuf.Bytes())
}
// putLogUpdate writes an htlc to the provided `bkt`, using `index` as the key.
func putLogUpdate(bkt kvdb.RwBucket, idx uint16, htlc *common.LogUpdate) error {
var b bytes.Buffer
if err := serializeLogUpdate(&b, htlc); err != nil {
return err
}
return bkt.Put(uint16Key(idx), b.Bytes())
}
// LoadFwdPkgs scans the forwarding log for any packages that haven't been
// processed, and returns their deserialized log updates in a map indexed by the
// remote commitment height at which the updates were locked in.
func (p *ChannelPackager) LoadFwdPkgs(tx kvdb.RTx) ([]*common.FwdPkg, error) {
return loadChannelFwdPkgs(tx, p.source)
}
// loadChannelFwdPkgs loads all forwarding packages owned by `source`.
func loadChannelFwdPkgs(tx kvdb.RTx, source lnwire.ShortChannelID) ([]*common.FwdPkg, error) { // nolint: dupl
fwdPkgBkt := tx.ReadBucket(fwdPackagesKey)
if fwdPkgBkt == nil {
return nil, nil
}
sourceKey := makeLogKey(source.ToUint64())
sourceBkt := fwdPkgBkt.NestedReadBucket(sourceKey[:])
if sourceBkt == nil {
return nil, nil
}
var heights []uint64
if err := sourceBkt.ForEach(func(k, _ []byte) error {
if len(k) != 8 {
return ErrCorruptedFwdPkg
}
heights = append(heights, byteOrder.Uint64(k))
return nil
}); err != nil {
return nil, err
}
// Load the forwarding package for each retrieved height.
fwdPkgs := make([]*common.FwdPkg, 0, len(heights))
for _, height := range heights {
fwdPkg, err := loadFwdPkg(fwdPkgBkt, source, height)
if err != nil {
return nil, err
}
fwdPkgs = append(fwdPkgs, fwdPkg)
}
return fwdPkgs, nil
}
// loadFwdPkg reads the packager's fwd pkg at a given height, and determines the
// appropriate FwdState.
func loadFwdPkg(fwdPkgBkt kvdb.RBucket, source lnwire.ShortChannelID,
height uint64) (*common.FwdPkg, error) {
sourceKey := makeLogKey(source.ToUint64())
sourceBkt := fwdPkgBkt.NestedReadBucket(sourceKey[:])
if sourceBkt == nil {
return nil, ErrCorruptedFwdPkg
}
heightKey := makeLogKey(height)
heightBkt := sourceBkt.NestedReadBucket(heightKey[:])
if heightBkt == nil {
return nil, ErrCorruptedFwdPkg
}
// Load ADDs from disk.
addBkt := heightBkt.NestedReadBucket(addBucketKey)
if addBkt == nil {
return nil, ErrCorruptedFwdPkg
}
adds, err := loadHtlcs(addBkt)
if err != nil {
return nil, err
}
// Load ack filter from disk.
ackFilterBytes := heightBkt.Get(ackFilterKey)
if ackFilterBytes == nil {
return nil, ErrCorruptedFwdPkg
}
ackFilterReader := bytes.NewReader(ackFilterBytes)
ackFilter := &common.PkgFilter{}
if err := ackFilter.Decode(ackFilterReader); err != nil {
return nil, err
}
// Load SETTLE/FAILs from disk.
failSettleBkt := heightBkt.NestedReadBucket(failSettleBucketKey)
if failSettleBkt == nil {
return nil, ErrCorruptedFwdPkg
}
failSettles, err := loadHtlcs(failSettleBkt)
if err != nil {
return nil, err
}
// Load settle fail filter from disk.
settleFailFilterBytes := heightBkt.Get(settleFailFilterKey)
if settleFailFilterBytes == nil {
return nil, ErrCorruptedFwdPkg
}
settleFailFilterReader := bytes.NewReader(settleFailFilterBytes)
settleFailFilter := &common.PkgFilter{}
if err := settleFailFilter.Decode(settleFailFilterReader); err != nil {
return nil, err
}
// Initialize the fwding package, which always starts in the
// FwdStateLockedIn. We can determine what state the package was left in
// by examining constraints on the information loaded from disk.
fwdPkg := &common.FwdPkg{
Source: source,
State: common.FwdStateLockedIn,
Height: height,
Adds: adds,
AckFilter: ackFilter,
SettleFails: failSettles,
SettleFailFilter: settleFailFilter,
}
// Check to see if we have written the set exported filter adds to
// disk. If we haven't, processing of this package was never started, or
// failed during the last attempt.
fwdFilterBytes := heightBkt.Get(fwdFilterKey)
if fwdFilterBytes == nil {
nAdds := uint16(len(adds))
fwdPkg.FwdFilter = common.NewPkgFilter(nAdds)
return fwdPkg, nil
}
fwdFilterReader := bytes.NewReader(fwdFilterBytes)
fwdPkg.FwdFilter = &common.PkgFilter{}
if err := fwdPkg.FwdFilter.Decode(fwdFilterReader); err != nil {
return nil, err
}
// Otherwise, a complete round of processing was completed, and we
// advance the package to FwdStateProcessed.
fwdPkg.State = common.FwdStateProcessed
// If every add, settle, and fail has been fully acknowledged, we can
// safely set the package's state to FwdStateCompleted, signalling that
// it can be garbage collected.
if fwdPkg.AckFilter.IsFull() && fwdPkg.SettleFailFilter.IsFull() {
fwdPkg.State = common.FwdStateCompleted
}
return fwdPkg, nil
}
// loadHtlcs retrieves all serialized htlcs in a bucket, returning
// them in order of the indexes they were written under.
func loadHtlcs(bkt kvdb.RBucket) ([]common.LogUpdate, error) {
var htlcs []common.LogUpdate
if err := bkt.ForEach(func(_, v []byte) error {
htlc, err := deserializeLogUpdate(bytes.NewReader(v))
if err != nil {
return err
}
htlcs = append(htlcs, *htlc)
return nil
}); err != nil {
return nil, err
}
return htlcs, nil
}
// serializeLogUpdate writes a log update to the provided io.Writer.
func serializeLogUpdate(w io.Writer, l *common.LogUpdate) error {
return WriteElements(w, l.LogIndex, l.UpdateMsg)
}
// deserializeLogUpdate reads a log update from the provided io.Reader.
func deserializeLogUpdate(r io.Reader) (*common.LogUpdate, error) {
l := &common.LogUpdate{}
if err := ReadElements(r, &l.LogIndex, &l.UpdateMsg); err != nil {
return nil, err
}
return l, nil
}