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
|
// 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 dex
import (
"fmt"
"path/filepath"
"time"
dexCore "github.com/dexon-foundation/dexon-consensus-core/core"
"github.com/dexon-foundation/dexon-consensus-core/core/blockdb"
coreEcdsa "github.com/dexon-foundation/dexon-consensus-core/core/crypto/ecdsa"
"github.com/dexon-foundation/dexon/accounts"
"github.com/dexon-foundation/dexon/consensus"
"github.com/dexon-foundation/dexon/consensus/dexcon"
"github.com/dexon-foundation/dexon/core"
"github.com/dexon-foundation/dexon/core/bloombits"
"github.com/dexon-foundation/dexon/core/rawdb"
"github.com/dexon-foundation/dexon/core/vm"
"github.com/dexon-foundation/dexon/dex/gasprice"
"github.com/dexon-foundation/dexon/eth/downloader"
"github.com/dexon-foundation/dexon/ethdb"
"github.com/dexon-foundation/dexon/event"
"github.com/dexon-foundation/dexon/internal/ethapi"
"github.com/dexon-foundation/dexon/log"
"github.com/dexon-foundation/dexon/node"
"github.com/dexon-foundation/dexon/p2p"
"github.com/dexon-foundation/dexon/params"
"github.com/dexon-foundation/dexon/rpc"
)
// Dexon implementes the DEXON fullnode service.
type Dexon struct {
config *Config
chainConfig *params.ChainConfig
// Channel for shutting down the service
shutdownChan chan bool // Channel for shutting down the Ethereum
// Handlers
txPool *core.TxPool
blockchain *core.BlockChain
protocolManager *ProtocolManager
// DB interfaces
chainDb ethdb.Database // Block chain database
eventMux *event.TypeMux
engine consensus.Engine
accountManager *accounts.Manager
bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
bloomIndexer *core.ChainIndexer // Bloom indexer operating during block imports
APIBackend *DexAPIBackend
// Dexon consensus.
app *DexconApp
governance *DexconGovernance
network *DexconNetwork
blockdb blockdb.BlockDatabase
consensus *dexCore.Consensus
networkID uint64
netRPCService *ethapi.PublicNetAPI
}
func New(ctx *node.ServiceContext, config *Config) (*Dexon, error) {
// Consensus.
blockDBPath := filepath.Join(ctx.Config.DataDir, "dexcon", "blockdb")
db, err := blockdb.NewLevelDBBackedBlockDB(blockDBPath)
if err != nil {
panic(err)
}
chainDb, err := CreateDB(ctx, config, "chaindata")
if err != nil {
return nil, err
}
chainConfig, genesisHash, genesisErr := core.SetupGenesisBlock(chainDb,
config.Genesis)
if _, ok := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !ok {
return nil, genesisErr
}
log.Info("Initialised chain configuration", "config", chainConfig)
if !config.SkipBcVersionCheck {
bcVersion := rawdb.ReadDatabaseVersion(chainDb)
if bcVersion != nil && *bcVersion != core.BlockChainVersion {
return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d).\n",
bcVersion, core.BlockChainVersion)
}
rawdb.WriteDatabaseVersion(chainDb, core.BlockChainVersion)
}
dex := &Dexon{
config: config,
chainDb: chainDb,
chainConfig: chainConfig,
eventMux: ctx.EventMux,
accountManager: ctx.AccountManager,
shutdownChan: make(chan bool),
networkID: config.NetworkId,
bloomRequests: make(chan chan *bloombits.Retrieval),
bloomIndexer: NewBloomIndexer(chainDb, params.BloomBitsBlocks, params.BloomConfirms),
blockdb: db,
engine: dexcon.New(¶ms.DexconConfig{}),
}
var (
vmConfig = vm.Config{
EnablePreimageRecording: config.EnablePreimageRecording,
EWASMInterpreter: config.EWASMInterpreter,
EVMInterpreter: config.EVMInterpreter,
}
cacheConfig = &core.CacheConfig{Disabled: config.NoPruning, TrieCleanLimit: config.TrieCleanCache, TrieDirtyLimit: config.TrieDirtyCache, TrieTimeLimit: config.TrieTimeout}
)
dex.blockchain, err = core.NewBlockChain(chainDb, cacheConfig, dex.chainConfig, dex.engine, vmConfig, nil)
// Rewind the chain in case of an incompatible config upgrade.
if compat, ok := genesisErr.(*params.ConfigCompatError); ok {
log.Warn("Rewinding chain to upgrade configuration", "err", compat)
dex.blockchain.SetHead(compat.RewindTo)
rawdb.WriteChainConfig(chainDb, genesisHash, chainConfig)
}
dex.bloomIndexer.Start(dex.blockchain)
if config.TxPool.Journal != "" {
config.TxPool.Journal = ctx.ResolvePath(config.TxPool.Journal)
}
dex.txPool = core.NewTxPool(config.TxPool, dex.chainConfig, dex.blockchain)
dex.APIBackend = &DexAPIBackend{dex, nil}
gpoParams := config.GPO
if gpoParams.Default == nil {
gpoParams.Default = config.DefaultGasPrice
}
dex.APIBackend.gpo = gasprice.NewOracle(dex.APIBackend, gpoParams)
dex.governance = NewDexconGovernance(dex.APIBackend, dex.chainConfig, config.PrivateKey)
dex.app = NewDexconApp(dex.txPool, dex.blockchain, dex.governance, chainDb, config, vmConfig)
pm, err := NewProtocolManager(dex.chainConfig, config.SyncMode,
config.NetworkId, dex.eventMux, dex.txPool, dex.engine, dex.blockchain,
chainDb, dex.governance)
if err != nil {
return nil, err
}
dex.protocolManager = pm
dex.network = NewDexconNetwork(pm)
privKey := coreEcdsa.NewPrivateKeyFromECDSA(config.PrivateKey)
dex.consensus = dexCore.NewConsensus(time.Now().Add(10*time.Second),
dex.app, dex.governance, db, dex.network, privKey)
return dex, nil
}
func (s *Dexon) Protocols() []p2p.Protocol {
return nil
}
func (s *Dexon) APIs() []rpc.API {
return nil
}
func (s *Dexon) Start(srvr *p2p.Server) error {
// Start the bloom bits servicing goroutines
s.startBloomHandlers(params.BloomBitsBlocks)
// Start the RPC service
s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.NetVersion())
// Figure out a max peers count based on the server limits
maxPeers := srvr.MaxPeers
if s.config.LightServ > 0 {
if s.config.LightPeers >= srvr.MaxPeers {
return fmt.Errorf("invalid peer config: light peer count (%d) >= total peer count (%d)", s.config.LightPeers, srvr.MaxPeers)
}
maxPeers -= s.config.LightPeers
}
// Start the networking layer and the light server if requested
s.protocolManager.Start(srvr, maxPeers)
s.protocolManager.addSelfMeta()
return nil
}
func (s *Dexon) Stop() error {
return nil
}
// CreateDB creates the chain database.
func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Database, error) {
db, err := ctx.OpenDatabase(name, config.DatabaseCache, config.DatabaseHandles)
if err != nil {
return nil, err
}
if db, ok := db.(*ethdb.LDBDatabase); ok {
db.Meter("eth/db/chaindata/")
}
return db, nil
}
func (d *Dexon) AccountManager() *accounts.Manager { return d.accountManager }
func (d *Dexon) BlockChain() *core.BlockChain { return d.blockchain }
func (d *Dexon) TxPool() *core.TxPool { return d.txPool }
func (d *Dexon) DexVersion() int { return int(d.protocolManager.SubProtocols[0].Version) }
func (d *Dexon) EventMux() *event.TypeMux { return d.eventMux }
func (d *Dexon) Engine() consensus.Engine { return d.engine }
func (d *Dexon) ChainDb() ethdb.Database { return d.chainDb }
func (d *Dexon) Downloader() *downloader.Downloader { return d.protocolManager.downloader }
func (d *Dexon) NetVersion() uint64 { return d.networkID }
|
