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
|
// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.
package simulation
import (
"fmt"
"sort"
"time"
"github.com/dexon-foundation/dexon-consensus-core/blockdb"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
"github.com/dexon-foundation/dexon-consensus-core/crypto"
"github.com/dexon-foundation/dexon-consensus-core/simulation/config"
)
// Validator represents a validator in DexCon.
type Validator struct {
network Network
app *simApp
gov *simGovernance
db blockdb.BlockDatabase
config config.Validator
msgChannel <-chan interface{}
isFinished chan struct{}
ID types.ValidatorID
chainID uint64
prvKey crypto.PrivateKey
sigToPub core.SigToPubFn
consensus *core.Consensus
compactionChain *core.BlockChain
}
// NewValidator returns a new empty validator.
func NewValidator(
prvKey crypto.PrivateKey,
sigToPub core.SigToPubFn,
config config.Validator,
network Network) *Validator {
id := types.NewValidatorID(prvKey.PublicKey())
db, err := blockdb.NewMemBackedBlockDB(
id.String() + ".blockdb")
if err != nil {
panic(err)
}
gov := newSimGovernance(config.Num, config.Consensus)
return &Validator{
ID: id,
prvKey: prvKey,
sigToPub: sigToPub,
config: config,
network: network,
app: newSimApp(id, network),
gov: gov,
db: db,
isFinished: make(chan struct{}),
}
}
// GetID returns the ID of validator.
func (v *Validator) GetID() types.ValidatorID {
return v.ID
}
// Run starts the validator.
func (v *Validator) Run(legacy bool) {
v.network.Join(v)
v.msgChannel = v.network.ReceiveChan()
hashes := make(common.Hashes, 0, v.network.NumPeers())
for _, vID := range v.network.Endpoints() {
v.gov.addValidator(vID)
hashes = append(hashes, vID.Hash)
}
sort.Sort(hashes)
for i, hash := range hashes {
if hash == v.ID.Hash {
v.chainID = uint64(i)
break
}
}
if legacy {
v.consensus = core.NewConsensus(
v.app, v.gov, v.db, v.network,
time.NewTicker(
time.Duration(v.config.Legacy.ProposeIntervalMean)*time.Millisecond),
v.prvKey, v.sigToPub)
go v.consensus.RunLegacy()
} else {
v.consensus = core.NewConsensus(
v.app, v.gov, v.db, v.network,
time.NewTicker(
time.Duration(v.config.Lambda)*time.Millisecond),
v.prvKey, v.sigToPub)
go v.consensus.Run()
}
isShutdown := make(chan struct{})
go v.CheckServerInfo(isShutdown)
// Blocks forever.
<-isShutdown
v.consensus.Stop()
if err := v.db.Close(); err != nil {
fmt.Println(err)
}
v.network.NotifyServer(Message{
Type: shutdownAck,
})
v.isFinished <- struct{}{}
}
// Wait for the validator to stop (if peerServer told it to).
func (v *Validator) Wait() {
<-v.isFinished
}
// CheckServerInfo will check the info from the peerServer and update
// validator's status if needed.
func (v *Validator) CheckServerInfo(isShutdown chan struct{}) {
for {
infoMsg := v.network.GetServerInfo()
if infoMsg.Status == statusShutdown {
isShutdown <- struct{}{}
break
}
time.Sleep(250 * time.Millisecond)
}
}
|
