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
|
package eth
import (
"net"
"sync"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/event"
ethlogger "github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/pow/ezp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/ethereum/go-ethereum/whisper"
)
const (
seedNodeAddress = "poc-7.ethdev.com:30300"
)
var logger = ethlogger.NewLogger("SERV")
type Ethereum struct {
// Channel for shutting down the ethereum
shutdownChan chan bool
quit chan bool
// DB interface
db ethutil.Database
blacklist p2p.Blacklist
//*** SERVICES ***
// State manager for processing new blocks and managing the over all states
blockManager *core.BlockManager
txPool *core.TxPool
chainManager *core.ChainManager
blockPool *BlockPool
whisper *whisper.Whisper
server *p2p.Server
eventMux *event.TypeMux
txSub event.Subscription
blockSub event.Subscription
RpcServer *rpc.JsonRpcServer
keyManager *crypto.KeyManager
clientIdentity p2p.ClientIdentity
synclock sync.Mutex
syncGroup sync.WaitGroup
Mining bool
}
func New(db ethutil.Database, identity p2p.ClientIdentity, keyManager *crypto.KeyManager, nat p2p.NAT, port string, maxPeers int) (*Ethereum, error) {
saveProtocolVersion(db)
ethutil.Config.Db = db
eth := &Ethereum{
shutdownChan: make(chan bool),
quit: make(chan bool),
db: db,
keyManager: keyManager,
clientIdentity: identity,
blacklist: p2p.NewBlacklist(),
eventMux: &event.TypeMux{},
}
eth.txPool = core.NewTxPool(eth)
eth.chainManager = core.NewChainManager(eth.EventMux())
eth.blockManager = core.NewBlockManager(eth)
eth.chainManager.SetProcessor(eth.blockManager)
eth.whisper = whisper.New()
hasBlock := eth.chainManager.HasBlock
insertChain := eth.chainManager.InsertChain
eth.blockPool = NewBlockPool(hasBlock, insertChain, ezp.Verify)
// Start services
eth.txPool.Start()
ethProto := EthProtocol(eth.txPool, eth.chainManager, eth.blockPool)
protocols := []p2p.Protocol{ethProto, eth.whisper.Protocol()}
server := &p2p.Server{
Identity: identity,
MaxPeers: maxPeers,
Protocols: protocols,
ListenAddr: ":" + port,
Blacklist: eth.blacklist,
NAT: nat,
}
eth.server = server
return eth, nil
}
func (s *Ethereum) KeyManager() *crypto.KeyManager {
return s.keyManager
}
func (s *Ethereum) ClientIdentity() p2p.ClientIdentity {
return s.clientIdentity
}
func (s *Ethereum) ChainManager() *core.ChainManager {
return s.chainManager
}
func (s *Ethereum) BlockManager() *core.BlockManager {
return s.blockManager
}
func (s *Ethereum) TxPool() *core.TxPool {
return s.txPool
}
func (s *Ethereum) BlockPool() *BlockPool {
return s.blockPool
}
func (s *Ethereum) EventMux() *event.TypeMux {
return s.eventMux
}
func (self *Ethereum) Db() ethutil.Database {
return self.db
}
func (s *Ethereum) IsMining() bool {
return s.Mining
}
func (s *Ethereum) IsListening() bool {
// XXX TODO
return false
}
func (s *Ethereum) PeerCount() int {
return s.server.PeerCount()
}
func (s *Ethereum) Peers() []*p2p.Peer {
return s.server.Peers()
}
// Start the ethereum
func (s *Ethereum) Start(seed bool) error {
err := s.server.Start()
if err != nil {
return err
}
s.blockPool.Start()
s.whisper.Start()
// broadcast transactions
s.txSub = s.eventMux.Subscribe(core.TxPreEvent{})
go s.txBroadcastLoop()
// broadcast mined blocks
s.blockSub = s.eventMux.Subscribe(core.NewMinedBlockEvent{})
go s.blockBroadcastLoop()
// TODO: read peers here
if seed {
logger.Infof("Connect to seed node %v", seedNodeAddress)
if err := s.SuggestPeer(seedNodeAddress); err != nil {
return err
}
}
logger.Infoln("Server started")
return nil
}
func (self *Ethereum) SuggestPeer(addr string) error {
netaddr, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
logger.Errorf("couldn't resolve %s:", addr, err)
return err
}
self.server.SuggestPeer(netaddr.IP, netaddr.Port, nil)
return nil
}
func (s *Ethereum) Stop() {
// Close the database
defer s.db.Close()
close(s.quit)
s.txSub.Unsubscribe() // quits txBroadcastLoop
s.blockSub.Unsubscribe() // quits blockBroadcastLoop
if s.RpcServer != nil {
s.RpcServer.Stop()
}
s.txPool.Stop()
s.eventMux.Stop()
s.blockPool.Stop()
s.whisper.Stop()
logger.Infoln("Server stopped")
close(s.shutdownChan)
}
// This function will wait for a shutdown and resumes main thread execution
func (s *Ethereum) WaitForShutdown() {
<-s.shutdownChan
}
// now tx broadcasting is taken out of txPool
// handled here via subscription, efficiency?
func (self *Ethereum) txBroadcastLoop() {
// automatically stops if unsubscribe
for obj := range self.txSub.Chan() {
event := obj.(core.TxPreEvent)
self.server.Broadcast("eth", TxMsg, []interface{}{event.Tx.RlpData()})
}
}
func (self *Ethereum) blockBroadcastLoop() {
// automatically stops if unsubscribe
for obj := range self.txSub.Chan() {
event := obj.(core.NewMinedBlockEvent)
self.server.Broadcast("eth", NewBlockMsg, event.Block.Value().Val)
}
}
func saveProtocolVersion(db ethutil.Database) {
d, _ := db.Get([]byte("ProtocolVersion"))
protocolVersion := ethutil.NewValue(d).Uint()
if protocolVersion == 0 {
db.Put([]byte("ProtocolVersion"), ethutil.NewValue(ProtocolVersion).Bytes())
}
}
|
