-
Notifications
You must be signed in to change notification settings - Fork 103
/
protocol.go
448 lines (383 loc) · 11.9 KB
/
protocol.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
/**
* @file
* @copyright defined in go-seele/LICENSE
*/
package light
import (
"errors"
"fmt"
"math/big"
rand2 "math/rand"
"sync"
"time"
"github.com/seeleteam/go-seele/common"
"github.com/seeleteam/go-seele/core"
"github.com/seeleteam/go-seele/core/state"
"github.com/seeleteam/go-seele/core/store"
"github.com/seeleteam/go-seele/core/types"
"github.com/seeleteam/go-seele/event"
"github.com/seeleteam/go-seele/log"
"github.com/seeleteam/go-seele/p2p"
)
const (
statusDataMsgCode uint16 = 0
announceRequestCode uint16 = 1
announceCode uint16 = 2
syncHashRequestCode uint16 = 3
syncHashResponseCode uint16 = 4
downloadHeadersRequestCode uint16 = 5
downloadHeadersResponseCode uint16 = 6
msgWaitTimeout = time.Second * 60
)
var (
errReadChain = errors.New("load message from chain err")
)
// BlockChain define some interfaces related to underlying blockchain
type BlockChain interface {
GetCurrentState() (*state.Statedb, error)
GetState(root common.Hash) (*state.Statedb, error)
GetStateByRootAndBlockHash(root, blockHash common.Hash) (*state.Statedb, error)
GetStore() store.BlockchainStore
GetHeadRollbackEventManager() *event.EventManager
CurrentHeader() *types.BlockHeader
WriteHeader(*types.BlockHeader) error
PutCurrentHeader(*types.BlockHeader)
PutTd(*big.Int)
}
// TransactionPool define some interfaces related to add and get txs
type TransactionPool interface {
AddTransaction(tx *types.Transaction) error
GetTransaction(txHash common.Hash) *types.Transaction
}
func codeToStr(code uint16) string {
switch code {
case statusDataMsgCode:
return "statusDataMsgCode"
case announceRequestCode:
return "announceRequestCode"
case announceCode:
return "announceCode"
case syncHashRequestCode:
return "syncHashRequestCode"
case syncHashResponseCode:
return "syncHashResponseCode"
case downloadHeadersRequestCode:
return "downloadHeadersRequestCode"
case downloadHeadersResponseCode:
return "downloadHeadersResponseCode"
case blockRequestCode:
return "blockRequestCode"
case blockResponseCode:
return "blockResponseCode"
case addTxRequestCode:
return "addTxRequestCode"
case addTxResponseCode:
return "addTxResponseCode"
case trieRequestCode:
return "trieRequestCode"
case trieResponseCode:
return "trieResponseCode"
case receiptRequestCode:
return "receiptRequestCode"
case receiptResponseCode:
return "receiptResponseCode"
case txByHashRequestCode:
return "txByHashRequestCode"
case txByHashResponseCode:
return "txByHashResponseCode"
case protocolMsgCodeLength:
return "protocolMsgCodeLength"
}
return "unknown"
}
// LightProtocol service implementation of seele
type LightProtocol struct {
p2p.Protocol
bServerMode bool
networkID string
txPool TransactionPool
debtPool *core.DebtPool
chain BlockChain
peerSet *peerSet
odrBackend *odrBackend
downloader *Downloader
wg sync.WaitGroup
quitCh chan struct{}
syncCh chan struct{}
chainHeaderChangeCh chan common.Hash
log *log.SeeleLog
shard uint
}
// NewLightProtocol create LightProtocol
func NewLightProtocol(networkID string, txPool TransactionPool, debtPool *core.DebtPool, chain BlockChain, serverMode bool, odrBackend *odrBackend,
log *log.SeeleLog, shard uint) (s *LightProtocol, err error) {
s = &LightProtocol{
Protocol: p2p.Protocol{
Name: fmt.Sprintf("%s_%d", LightProtoName, shard),
Version: LightSeeleVersion,
Length: protocolMsgCodeLength,
},
bServerMode: serverMode,
networkID: networkID,
txPool: txPool,
debtPool: debtPool,
chain: chain,
log: log,
odrBackend: odrBackend,
quitCh: make(chan struct{}),
syncCh: make(chan struct{}),
peerSet: newPeerSet(),
shard: shard,
}
if !serverMode {
s.downloader = newDownloader(chain)
}
s.Protocol.AddPeer = s.handleAddPeer
s.Protocol.DeletePeer = s.handleDelPeer
s.Protocol.GetPeer = s.handleGetPeer
rand2.Seed(time.Now().UnixNano())
return s, nil
}
// Start starts data syncer
func (lp *LightProtocol) Start() {
lp.log.Debug("LightProtocol.Start called!")
if !lp.bServerMode {
go lp.syncer()
}
}
// Stop stops protocol, called when seeleService quits.
func (lp *LightProtocol) Stop() {
close(lp.quitCh)
close(lp.syncCh)
lp.wg.Wait()
}
// syncer try to synchronise with remote peer
func (lp *LightProtocol) syncer() {
defer lp.downloader.Terminate()
defer lp.wg.Done()
lp.wg.Add(1)
forceSync := time.NewTicker(forceSyncInterval * 5)
for {
select {
case <-lp.syncCh:
go lp.synchronise(lp.peerSet.bestPeers())
case <-forceSync.C:
go lp.synchronise(lp.peerSet.bestPeers())
case <-lp.quitCh:
return
}
}
}
func (lp *LightProtocol) synchronise(peers []*peer) {
hash, err := lp.chain.GetStore().GetHeadBlockHash()
if err != nil {
lp.log.Error("lp.synchronise GetHeadBlockHash err.[%s]", err)
return
}
localTD, err := lp.chain.GetStore().GetBlockTotalDifficulty(hash)
if err != nil {
lp.log.Error("lp.synchronise GetBlockTotalDifficulty err.[%s]", err)
return
}
// print the light chain info
localCurHeader, err := lp.chain.GetStore().GetBlockHeader(hash)
if err != nil {
lp.log.Error("lp.synchronise GetHeadBlockHeader err.[%s]", err)
return
}
if len(peers) == 0 {
lp.log.Info("lightchain, shard: %d, local height: %d, no peer connected", lp.shard, localCurHeader.Height)
return
}
bestPeer := peers[0]
lp.log.Info("lightchain, shard: %d, local height: %d, best peer: %v, peer height: %d", lp.shard, localCurHeader.Height, bestPeer.peerID, bestPeer.headBlockNum)
for _, p := range peers {
_, pTd := p.Head()
// if total difficulty is not smaller than remote peer td, then do not need synchronise.
if localTD.Cmp(pTd) >= 0 {
continue
}
err = lp.downloader.synchronise(p)
if err != nil {
if err == ErrIsSynchronising {
lp.log.Debug("exit synchronise as it is already running.")
} else {
lp.log.Debug("synchronise err. %s", err)
}
continue
}
}
}
func (lp *LightProtocol) handleAddPeer(p2pPeer *p2p.Peer, rw p2p.MsgReadWriter) bool {
if lp.peerSet.Find(p2pPeer.Node.ID) != nil {
lp.log.Error("handleAddPeer called, but peer of this public-key has already existed, so need quit!")
return false
}
newPeer := newPeer(LightSeeleVersion, p2pPeer, rw, lp.log, lp)
store := lp.chain.GetStore()
hash, err := store.GetHeadBlockHash()
if err != nil {
lp.log.Error("lp.handleAddPeer GetHeadBlockHash err.[%s]", err)
return false
}
header, err := store.GetBlockHeader(hash)
if err != nil {
lp.log.Error("lp.handleAddPeer GetBlockHeader err.[%s]", err)
return false
}
localTD, err := store.GetBlockTotalDifficulty(hash)
if err != nil {
return false
}
genesisBlock, err := store.GetBlockByHeight(0)
if err != nil {
return false
}
if err := newPeer.handShake(lp.networkID, localTD, hash, header.Height, genesisBlock.HeaderHash); err != nil {
if err == errModeNotMatch {
lp.log.Debug("handleAddPeer message. %s", err)
} else {
lp.log.Debug("handleAddPeer err. %s", err)
}
return false
}
if lp.bServerMode {
magic := rand2.Uint32()
lp.log.Debug("handle new Peer sendAnnounce,peer:%s", newPeer.peerStrID)
if err := newPeer.sendAnnounce(magic, 0, 0); err != nil {
lp.log.Debug("sendAnnounce err. %s", err)
newPeer.Disconnect(DiscAnnounceErr)
return false
}
}
lp.log.Info("add peer %s -> %s to LightProtocol.", p2pPeer.LocalAddr(), p2pPeer.RemoteAddr())
lp.peerSet.Add(newPeer)
go lp.handleMsg(newPeer)
return true
}
func (lp *LightProtocol) handleGetPeer(address common.Address) interface{} {
if p := lp.peerSet.Find(address); p != nil {
return p.Info()
}
return nil
}
func (lp *LightProtocol) handleDelPeer(peer *p2p.Peer) {
lp.log.Debug("delete peer from peer set. %s", peer.Node)
if p := lp.peerSet.Find(peer.Node.ID); p != nil {
p.close()
}
lp.peerSet.Remove(peer.Node.ID)
}
func (lp *LightProtocol) handleMsg(peer *peer) {
handler:
for {
msg, err := peer.rw.ReadMsg()
if err != nil {
lp.log.Debug("get error when read msg from %s, %s", peer.peerStrID, err)
break
}
bNeedDeliverOdr := false
switch msg.Code {
case announceRequestCode:
lp.log.Debug("get announceRequestCode msg from %s,", peer.peerStrID)
var query AnnounceQuery
err := common.Deserialize(msg.Payload, &query)
if err != nil {
lp.log.Error("failed to deserialize AnnounceQuery, quit! %s", err)
break handler
}
lp.log.Debug("handleMsg announceRequestCode sendAnnounce,peer:%s", peer.peerStrID)
if err := peer.sendAnnounce(query.Magic, query.Begin, query.End); err != nil {
lp.log.Error("failed to sendAnnounce, quit! %s", err)
break handler
}
case announceCode:
var query AnnounceBody
if time.Now().Unix()-peer.lastAnnounceCodeTime < 60 {
lp.log.Warn("peer lastAnnounceCode less than 60s, peer:%s", peer.peerStrID)
break handler
}
err := common.Deserialize(msg.Payload, &query)
if err != nil {
lp.log.Error("failed to deserialize Announce, quit! %s", err)
break handler
}
lp.log.Debug("handle msg announce code, peer:%s", peer.peerStrID)
if err := peer.handleAnnounce(&query); err != nil {
lp.log.Error("failed to handleAnnounce, quit! %s", err)
break handler
}
case syncHashRequestCode:
var query HeaderHashSyncQuery
err := common.Deserialize(msg.Payload, &query)
if err != nil {
lp.log.Error("failed to deserialize HeaderHashSyncQuery, quit! %s", err)
break handler
}
if err := peer.handleSyncHashRequest(&query); err != nil {
lp.log.Error("failed to handleSyncHashRequest, quit! %s", err)
break handler
}
case syncHashResponseCode:
var query HeaderHashSync
err := common.Deserialize(msg.Payload, &query)
if err != nil {
lp.log.Error("failed to deserialize syncHashResponseCode, quit! %s", err)
break handler
}
if err := peer.handleSyncHash(&query); err != nil {
lp.log.Error("failed to syncHashResponseCode, quit! %s", err)
break handler
}
case downloadHeadersRequestCode:
var query DownloadHeaderQuery
err := common.Deserialize(msg.Payload, &query)
if err != nil {
lp.log.Error("failed to deserialize DownloadHeaderQuery, quit! %s", err)
break handler
}
if err := peer.handleDownloadHeadersRequest(&query); err != nil {
lp.log.Error("failed to DownloadHeaderQuery, quit! %s", err)
break handler
}
case downloadHeadersResponseCode:
lp.downloader.deliverMsg(peer, msg)
default:
if odrResponseFactories[msg.Code] != nil {
bNeedDeliverOdr = true
} else if err := lp.handleOdrRequest(peer, msg); err != nil {
lp.log.Error("Failed to handle ODR message, code = %s, error = %s", codeToStr(msg.Code), err)
break handler
}
}
if bNeedDeliverOdr {
lp.odrBackend.msgCh <- msg
}
}
lp.handleDelPeer(peer.Peer)
lp.log.Debug("light.protocol.handlemsg run out!peer= %s!", peer.peerStrID)
peer.Disconnect(fmt.Sprintf("called from light.protocol.handlemsg. id=%s", peer.peerStrID))
}
func (lp *LightProtocol) handleOdrRequest(peer *peer, msg *p2p.Message) error {
factory, ok := odrRequestFactories[msg.Code]
if !ok {
return nil
}
request := factory()
if err := common.Deserialize(msg.Payload, request); err != nil {
return fmt.Errorf("deserialize request failed with %s", err)
}
lp.log.Debug("begin to handle ODR request, code = %v, payloadLen = %v", codeToStr(msg.Code), len(msg.Payload))
respCode, response := request.handle(lp)
buff := common.SerializePanic(response)
lp.log.Debug("peer send response, code = %v, payloadSizeBytes = %v, peerID = %v", codeToStr(respCode), len(buff), peer.peerStrID)
return p2p.SendMessage(peer.rw, respCode, buff)
}
// GetProtocolVersion gets protocol version
func (lp *LightProtocol) GetProtocolVersion() (uint, error) {
return lp.Protocol.Version, nil
}
// SendDifferentShardTx send tx to another shard
func (lp *LightProtocol) SendDifferentShardTx(tx *types.Transaction, shard uint) {
//@todo
}