plugeth/miner/miner.go
rjl493456442 d4961881d7
miner: suspend miner if node is syncing (#27218)
Drop the notions of uncles, and disables activities while syncing

-  Disable activities (e.g. generate pending state) while node is syncing,
-  Disable empty block submission (but empty block is still kept for payload building),
-  Drop uncle notion since (ethash is already deprecated)
2023-05-31 03:09:49 -04:00

247 lines
7.4 KiB
Go

// 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"
"sync"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/txpool"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
)
// Backend wraps all methods required for mining. Only full node is capable
// to offer all the functions here.
type Backend interface {
BlockChain() *core.BlockChain
TxPool() *txpool.TxPool
}
// Config is the configuration parameters of mining.
type Config struct {
Etherbase common.Address `toml:",omitempty"` // Public address for block mining rewards
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.
NewPayloadTimeout time.Duration // The maximum time allowance for creating a new payload
}
// DefaultConfig contains default settings for miner.
var DefaultConfig = Config{
GasCeil: 30000000,
GasPrice: big.NewInt(params.GWei),
// The default recommit time is chosen as two seconds since
// consensus-layer usually will wait a half slot of time(6s)
// for payload generation. It should be enough for Geth to
// run 3 rounds.
Recommit: 2 * time.Second,
NewPayloadTimeout: 2 * time.Second,
}
// Miner creates blocks and searches for proof-of-work values.
type Miner struct {
mux *event.TypeMux
eth Backend
engine consensus.Engine
exitCh chan struct{}
startCh chan struct{}
stopCh chan struct{}
worker *worker
wg sync.WaitGroup
}
func New(eth Backend, config *Config, chainConfig *params.ChainConfig, mux *event.TypeMux, engine consensus.Engine, isLocalBlock func(header *types.Header) bool) *Miner {
miner := &Miner{
mux: mux,
eth: eth,
engine: engine,
exitCh: make(chan struct{}),
startCh: make(chan struct{}),
stopCh: make(chan struct{}),
worker: newWorker(config, chainConfig, engine, eth, mux, isLocalBlock, true),
}
miner.wg.Add(1)
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() {
defer miner.wg.Done()
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")
}
miner.worker.syncing.Store(true)
case downloader.FailedEvent:
canStart = true
if shouldStart {
miner.worker.start()
}
miner.worker.syncing.Store(false)
case downloader.DoneEvent:
canStart = true
if shouldStart {
miner.worker.start()
}
miner.worker.syncing.Store(false)
// Stop reacting to downloader events
events.Unsubscribe()
}
case <-miner.startCh:
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() {
miner.startCh <- struct{}{}
}
func (miner *Miner) Stop() {
miner.stopCh <- struct{}{}
}
func (miner *Miner) Close() {
close(miner.exitCh)
miner.wg.Wait()
}
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. The returned
// values can be nil in case the pending block is not initialized
func (miner *Miner) Pending() (*types.Block, *state.StateDB) {
return miner.worker.pending()
}
// PendingBlock returns the currently pending block. The returned block can be
// nil in case the pending block is not initialized.
//
// 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.
// The returned values can be nil in case the pending block is not initialized.
func (miner *Miner) PendingBlockAndReceipts() (*types.Block, types.Receipts) {
return miner.worker.pendingBlockAndReceipts()
}
func (miner *Miner) SetEtherbase(addr common.Address) {
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)
}
// 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)
}
// BuildPayload builds the payload according to the provided parameters.
func (miner *Miner) BuildPayload(args *BuildPayloadArgs) (*Payload, error) {
return miner.worker.buildPayload(args)
}