forked from dominant-strategies/go-quai
-
Notifications
You must be signed in to change notification settings - Fork 0
/
miner.go
251 lines (224 loc) · 8.2 KB
/
miner.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
// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package miner implements Ethereum block creation and mining.
package miner
import (
"fmt"
"math/big"
"time"
"github.com/spruce-solutions/go-quai/common"
"github.com/spruce-solutions/go-quai/common/hexutil"
"github.com/spruce-solutions/go-quai/consensus"
"github.com/spruce-solutions/go-quai/core"
"github.com/spruce-solutions/go-quai/core/state"
"github.com/spruce-solutions/go-quai/core/types"
"github.com/spruce-solutions/go-quai/eth/downloader"
"github.com/spruce-solutions/go-quai/event"
"github.com/spruce-solutions/go-quai/log"
"github.com/spruce-solutions/go-quai/params"
)
// Backend wraps all methods required for mining.
type Backend interface {
BlockChain() *core.BlockChain
TxPool() *core.TxPool
StateAtBlock(block *types.Block, reexec uint64, base *state.StateDB, checkLive bool, preferDisk bool) (statedb *state.StateDB, err error)
}
// Config is the configuration parameters of mining.
type Config struct {
Etherbase common.Address `toml:",omitempty"` // Public address for block mining rewards (default = first account)
Notify []string `toml:",omitempty"` // HTTP URL list to be notified of new work packages (only useful in ethash).
NotifyFull bool `toml:",omitempty"` // Notify with pending block headers instead of work packages
ExtraData hexutil.Bytes `toml:",omitempty"` // Block extra data set by the miner
GasFloor uint64 // Target gas floor for mined blocks.
GasCeil uint64 // Target gas ceiling for mined blocks.
GasPrice *big.Int // Minimum gas price for mining a transaction
Recommit time.Duration // The time interval for miner to re-create mining work.
Noverify bool // Disable remote mining solution verification(only useful in ethash).
}
// Miner creates blocks and searches for proof-of-work values.
type Miner struct {
mux *event.TypeMux
worker *worker
coinbase common.Address
eth Backend
engine consensus.Engine
exitCh chan struct{}
startCh chan common.Address
stopCh chan struct{}
}
func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *event.TypeMux, engine consensus.Engine, isLocalBlock func(block *types.Header) bool) *Miner {
miner := &Miner{
eth: eth,
mux: mux,
engine: engine,
exitCh: make(chan struct{}),
startCh: make(chan common.Address),
stopCh: make(chan struct{}),
worker: newWorker(config, chainConfig, engine, eth, mux, isLocalBlock, true),
}
go miner.update()
return miner
}
// update keeps track of the downloader events. Please be aware that this is a one shot type of update loop.
// It's entered once and as soon as `Done` or `Failed` has been broadcasted the events are unregistered and
// the loop is exited. This to prevent a major security vuln where external parties can DOS you with blocks
// and halt your mining operation for as long as the DOS continues.
func (miner *Miner) update() {
events := miner.mux.Subscribe(downloader.StartEvent{}, downloader.DoneEvent{}, downloader.FailedEvent{})
defer func() {
if !events.Closed() {
events.Unsubscribe()
}
}()
shouldStart := false
canStart := true
dlEventCh := events.Chan()
for {
select {
case ev := <-dlEventCh:
if ev == nil {
// Unsubscription done, stop listening
dlEventCh = nil
continue
}
switch ev.Data.(type) {
case downloader.StartEvent:
wasMining := miner.Mining()
miner.worker.stop()
canStart = false
if wasMining {
// Resume mining after sync was finished
shouldStart = true
log.Info("Mining aborted due to sync")
}
case downloader.FailedEvent:
canStart = true
if shouldStart {
miner.SetEtherbase(miner.coinbase)
miner.worker.start()
}
case downloader.DoneEvent:
canStart = true
if shouldStart {
miner.SetEtherbase(miner.coinbase)
miner.worker.start()
}
// Stop reacting to downloader events
events.Unsubscribe()
}
case addr := <-miner.startCh:
miner.SetEtherbase(addr)
if canStart {
miner.worker.start()
}
shouldStart = true
case <-miner.stopCh:
shouldStart = false
miner.worker.stop()
case <-miner.exitCh:
miner.worker.close()
return
}
}
}
func (miner *Miner) Start(coinbase common.Address) {
miner.startCh <- coinbase
}
func (miner *Miner) Stop() {
miner.stopCh <- struct{}{}
}
func (miner *Miner) Close() {
close(miner.exitCh)
}
func (miner *Miner) Mining() bool {
return miner.worker.isRunning()
}
func (miner *Miner) Hashrate() uint64 {
if pow, ok := miner.engine.(consensus.PoW); ok {
return uint64(pow.Hashrate())
}
return 0
}
func (miner *Miner) SetExtra(extra []byte) error {
if uint64(len(extra)) > params.MaximumExtraDataSize {
return fmt.Errorf("extra exceeds max length. %d > %v", len(extra), params.MaximumExtraDataSize)
}
miner.worker.setExtra(extra)
return nil
}
// SetRecommitInterval sets the interval for sealing work resubmitting.
func (miner *Miner) SetRecommitInterval(interval time.Duration) {
miner.worker.setRecommitInterval(interval)
}
// Pending returns the currently pending block and associated state.
func (miner *Miner) Pending() (*types.Block, *state.StateDB) {
return miner.worker.pending()
}
// PendingBlock returns the currently pending block.
//
// Note, to access both the pending block and the pending state
// simultaneously, please use Pending(), as the pending state can
// change between multiple method calls
func (miner *Miner) PendingBlock() *types.Block {
return miner.worker.pendingBlock()
}
// PendingBlockAndReceipts returns the currently pending block and corresponding receipts.
func (miner *Miner) PendingBlockAndReceipts() (*types.Block, types.Receipts) {
return miner.worker.pendingBlockAndReceipts()
}
func (miner *Miner) SetEtherbase(addr common.Address) {
miner.coinbase = addr
miner.worker.setEtherbase(addr)
}
// SetGasCeil sets the gaslimit to strive for when mining blocks post 1559.
// For pre-1559 blocks, it sets the ceiling.
func (miner *Miner) SetGasCeil(ceil uint64) {
miner.worker.setGasCeil(ceil)
}
// EnablePreseal turns on the preseal mining feature. It's enabled by default.
// Note this function shouldn't be exposed to API, it's unnecessary for users
// (miners) to actually know the underlying detail. It's only for outside project
// which uses this library.
func (miner *Miner) EnablePreseal() {
miner.worker.enablePreseal()
}
// DisablePreseal turns off the preseal mining feature. It's necessary for some
// fake consensus engine which can seal blocks instantaneously.
// Note this function shouldn't be exposed to API, it's unnecessary for users
// (miners) to actually know the underlying detail. It's only for outside project
// which uses this library.
func (miner *Miner) DisablePreseal() {
miner.worker.disablePreseal()
}
// SubscribePendingLogs starts delivering logs from pending transactions
// to the given channel.
func (miner *Miner) SubscribePendingLogs(ch chan<- []*types.Log) event.Subscription {
return miner.worker.pendingLogsFeed.Subscribe(ch)
}
// SubscribePendingBlock starts delivering the pending block to the given channel.
func (miner *Miner) SubscribePendingBlock(ch chan<- *types.Header) event.Subscription {
return miner.worker.pendingBlockFeed.Subscribe(ch)
}
// Method to retrieve uncles from the worker in case not found in normal DB.
func (miner *Miner) GetUncle(hash common.Hash) *types.Block {
if uncle, exist := miner.worker.localUncles[hash]; exist {
return uncle
}
if uncle, exist := miner.worker.remoteUncles[hash]; exist {
return uncle
}
return nil
}