Official Go implementation of the Ethereum protocol
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go-ethereum/miner/miner.go

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5.4 KiB

// 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.
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package miner
import (
"fmt"
"math/big"
"sync"
"time"
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"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/params"
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)
// 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:"-"` // Deprecated
PendingFeeRecipient common.Address `toml:"-"` // Address for pending block rewards.
ExtraData hexutil.Bytes `toml:",omitempty"` // Block extra data set by the miner
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.
}
// DefaultConfig contains default settings for miner.
var DefaultConfig = Config{
GasCeil: 30_000_000,
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,
}
// Miner is the main object which takes care of submitting new work to consensus
// engine and gathering the sealing result.
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type Miner struct {
confMu sync.RWMutex // The lock used to protect the config fields: GasCeil, GasTip and Extradata
config *Config
chainConfig *params.ChainConfig
engine consensus.Engine
txpool *txpool.TxPool
chain *core.BlockChain
pending *pending
pendingMu sync.Mutex // Lock protects the pending block
}
// New creates a new miner with provided config.
func New(eth Backend, config Config, engine consensus.Engine) *Miner {
return &Miner{
config: &config,
chainConfig: eth.BlockChain().Config(),
engine: engine,
txpool: eth.TxPool(),
chain: eth.BlockChain(),
pending: &pending{},
}
}
// Pending returns the currently pending block and associated receipts, logs
// and statedb. The returned values can be nil in case the pending block is
// not initialized.
func (miner *Miner) Pending() (*types.Block, types.Receipts, *state.StateDB) {
pending := miner.getPending()
if pending == nil {
return nil, nil, nil
}
return pending.block, pending.receipts, pending.stateDB.Copy()
}
// SetExtra sets the content used to initialize the block extra field.
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.confMu.Lock()
miner.config.ExtraData = extra
miner.confMu.Unlock()
return nil
}
// 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.confMu.Lock()
miner.config.GasCeil = ceil
miner.confMu.Unlock()
}
// SetGasTip sets the minimum gas tip for inclusion.
func (miner *Miner) SetGasTip(tip *big.Int) error {
miner.confMu.Lock()
miner.config.GasPrice = tip
miner.confMu.Unlock()
return nil
}
// BuildPayload builds the payload according to the provided parameters.
func (miner *Miner) BuildPayload(args *BuildPayloadArgs) (*Payload, error) {
return miner.buildPayload(args)
}
// getPending retrieves the pending block based on the current head block.
// The result might be nil if pending generation is failed.
func (miner *Miner) getPending() *newPayloadResult {
header := miner.chain.CurrentHeader()
miner.pendingMu.Lock()
defer miner.pendingMu.Unlock()
if cached := miner.pending.resolve(header.Hash()); cached != nil {
return cached
}
var (
timestamp = uint64(time.Now().Unix())
withdrawal types.Withdrawals
)
if miner.chainConfig.IsShanghai(new(big.Int).Add(header.Number, big.NewInt(1)), timestamp) {
withdrawal = []*types.Withdrawal{}
}
ret := miner.generateWork(&generateParams{
timestamp: timestamp,
forceTime: false,
parentHash: header.Hash(),
coinbase: miner.config.PendingFeeRecipient,
random: common.Hash{},
withdrawals: withdrawal,
beaconRoot: nil,
noTxs: false,
})
if ret.err != nil {
return nil
}
miner.pending.update(header.Hash(), ret)
return ret
}