09777952ee
This commit adds pluggable consensus engines to go-ethereum. In short, it introduces a generic consensus interface, and refactors the entire codebase to use this interface.
406 lines
13 KiB
Go
406 lines
13 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Package eth implements the Ethereum protocol.
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package eth
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import (
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"fmt"
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"math/big"
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"regexp"
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"sync"
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"github.com/ethereum/go-ethereum/accounts"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/downloader"
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"github.com/ethereum/go-ethereum/eth/filters"
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"github.com/ethereum/go-ethereum/eth/gasprice"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/internal/ethapi"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/miner"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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var (
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datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
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portInUseErrRE = regexp.MustCompile("address already in use")
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)
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type Config struct {
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// The genesis block, which is inserted if the database is empty.
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// If nil, the Ethereum main net block is used.
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Genesis *core.Genesis
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NetworkId int // Network ID to use for selecting peers to connect to
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FastSync bool // Enables the state download based fast synchronisation algorithm
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LightMode bool // Running in light client mode
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LightServ int // Maximum percentage of time allowed for serving LES requests
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LightPeers int // Maximum number of LES client peers
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MaxPeers int // Maximum number of global peers
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SkipBcVersionCheck bool // e.g. blockchain export
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DatabaseCache int
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DatabaseHandles int
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DocRoot string
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PowFake bool
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PowTest bool
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PowShared bool
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ExtraData []byte
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EthashCacheDir string
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EthashCachesInMem int
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EthashCachesOnDisk int
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EthashDatasetDir string
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EthashDatasetsInMem int
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EthashDatasetsOnDisk int
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Etherbase common.Address
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GasPrice *big.Int
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MinerThreads int
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SolcPath string
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GpoMinGasPrice *big.Int
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GpoMaxGasPrice *big.Int
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GpoFullBlockRatio int
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GpobaseStepDown int
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GpobaseStepUp int
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GpobaseCorrectionFactor int
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EnablePreimageRecording bool
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}
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type LesServer interface {
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Start(srvr *p2p.Server)
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Stop()
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Protocols() []p2p.Protocol
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}
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// Ethereum implements the Ethereum full node service.
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type Ethereum struct {
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chainConfig *params.ChainConfig
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// Channel for shutting down the service
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shutdownChan chan bool // Channel for shutting down the ethereum
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stopDbUpgrade func() // stop chain db sequential key upgrade
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// Handlers
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txPool *core.TxPool
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txMu sync.Mutex
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blockchain *core.BlockChain
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protocolManager *ProtocolManager
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lesServer LesServer
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// DB interfaces
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chainDb ethdb.Database // Block chain database
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eventMux *event.TypeMux
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engine consensus.Engine
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accountManager *accounts.Manager
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ApiBackend *EthApiBackend
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miner *miner.Miner
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Mining bool
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MinerThreads int
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etherbase common.Address
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solcPath string
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netVersionId int
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netRPCService *ethapi.PublicNetAPI
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}
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func (s *Ethereum) AddLesServer(ls LesServer) {
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s.lesServer = ls
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s.protocolManager.lesServer = ls
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}
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// New creates a new Ethereum object (including the
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// initialisation of the common Ethereum object)
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func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
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chainDb, err := CreateDB(ctx, config, "chaindata")
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if err != nil {
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return nil, err
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}
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stopDbUpgrade := upgradeSequentialKeys(chainDb)
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chainConfig, genesisHash, genesisErr := core.SetupGenesisBlock(chainDb, config.Genesis)
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if _, ok := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !ok {
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return nil, genesisErr
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}
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log.Info("Initialised chain configuration", "config", chainConfig)
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eth := &Ethereum{
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chainDb: chainDb,
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chainConfig: chainConfig,
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eventMux: ctx.EventMux,
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accountManager: ctx.AccountManager,
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engine: CreateConsensusEngine(ctx, config, chainConfig, chainDb),
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shutdownChan: make(chan bool),
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stopDbUpgrade: stopDbUpgrade,
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netVersionId: config.NetworkId,
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etherbase: config.Etherbase,
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MinerThreads: config.MinerThreads,
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solcPath: config.SolcPath,
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}
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if err := addMipmapBloomBins(chainDb); err != nil {
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return nil, err
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}
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log.Info("Initialising Ethereum protocol", "versions", ProtocolVersions, "network", config.NetworkId)
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if !config.SkipBcVersionCheck {
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bcVersion := core.GetBlockChainVersion(chainDb)
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if bcVersion != core.BlockChainVersion && bcVersion != 0 {
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return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, core.BlockChainVersion)
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}
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core.WriteBlockChainVersion(chainDb, core.BlockChainVersion)
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}
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vmConfig := vm.Config{EnablePreimageRecording: config.EnablePreimageRecording}
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eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.engine, eth.eventMux, vmConfig)
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if err != nil {
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return nil, err
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}
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// Rewind the chain in case of an incompatible config upgrade.
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if compat, ok := genesisErr.(*params.ConfigCompatError); ok {
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log.Warn("Rewinding chain to upgrade configuration", "err", compat)
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eth.blockchain.SetHead(compat.RewindTo)
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core.WriteChainConfig(chainDb, genesisHash, chainConfig)
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}
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newPool := core.NewTxPool(eth.chainConfig, eth.EventMux(), eth.blockchain.State, eth.blockchain.GasLimit)
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eth.txPool = newPool
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maxPeers := config.MaxPeers
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if config.LightServ > 0 {
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// if we are running a light server, limit the number of ETH peers so that we reserve some space for incoming LES connections
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// temporary solution until the new peer connectivity API is finished
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halfPeers := maxPeers / 2
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maxPeers -= config.LightPeers
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if maxPeers < halfPeers {
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maxPeers = halfPeers
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}
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}
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if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.engine, eth.blockchain, chainDb); err != nil {
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return nil, err
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}
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eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.engine)
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eth.miner.SetGasPrice(config.GasPrice)
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eth.miner.SetExtra(config.ExtraData)
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gpoParams := &gasprice.GpoParams{
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GpoMinGasPrice: config.GpoMinGasPrice,
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GpoMaxGasPrice: config.GpoMaxGasPrice,
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GpoFullBlockRatio: config.GpoFullBlockRatio,
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GpobaseStepDown: config.GpobaseStepDown,
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GpobaseStepUp: config.GpobaseStepUp,
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GpobaseCorrectionFactor: config.GpobaseCorrectionFactor,
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}
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gpo := gasprice.NewGasPriceOracle(eth.blockchain, chainDb, eth.eventMux, gpoParams)
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eth.ApiBackend = &EthApiBackend{eth, gpo}
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return eth, nil
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}
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// CreateDB creates the chain database.
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func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Database, error) {
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db, err := ctx.OpenDatabase(name, config.DatabaseCache, config.DatabaseHandles)
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if db, ok := db.(*ethdb.LDBDatabase); ok {
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db.Meter("eth/db/chaindata/")
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}
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return db, err
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}
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// CreateConsensusEngine creates the required type of consensus engine instance for an Ethereum service
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func CreateConsensusEngine(ctx *node.ServiceContext, config *Config, chainConfig *params.ChainConfig, db ethdb.Database) consensus.Engine {
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switch {
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case config.PowFake:
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log.Warn("Ethash used in fake mode")
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return ethash.NewFaker()
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case config.PowTest:
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log.Warn("Ethash used in test mode")
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return ethash.NewTester()
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case config.PowShared:
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log.Warn("Ethash used in shared mode")
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return ethash.NewShared()
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default:
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return ethash.New(ctx.ResolvePath(config.EthashCacheDir), config.EthashCachesInMem, config.EthashCachesOnDisk,
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config.EthashDatasetDir, config.EthashDatasetsInMem, config.EthashDatasetsOnDisk)
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}
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}
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// APIs returns the collection of RPC services the ethereum package offers.
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// NOTE, some of these services probably need to be moved to somewhere else.
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func (s *Ethereum) APIs() []rpc.API {
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apis := ethapi.GetAPIs(s.ApiBackend, s.solcPath)
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// Append any APIs exposed explicitly by the consensus engine
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apis = append(apis, s.engine.APIs(s.BlockChain())...)
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// Append all the local APIs and return
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return append(apis, []rpc.API{
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{
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Namespace: "eth",
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Version: "1.0",
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Service: NewPublicEthereumAPI(s),
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Public: true,
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}, {
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Namespace: "eth",
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Version: "1.0",
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Service: NewPublicMinerAPI(s),
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Public: true,
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}, {
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Namespace: "eth",
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Version: "1.0",
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Service: downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
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Public: true,
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}, {
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Namespace: "miner",
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Version: "1.0",
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Service: NewPrivateMinerAPI(s),
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Public: false,
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}, {
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Namespace: "eth",
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Version: "1.0",
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Service: filters.NewPublicFilterAPI(s.ApiBackend, false),
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Public: true,
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}, {
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Namespace: "admin",
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Version: "1.0",
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Service: NewPrivateAdminAPI(s),
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}, {
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Namespace: "debug",
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Version: "1.0",
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Service: NewPublicDebugAPI(s),
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Public: true,
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}, {
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Namespace: "debug",
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Version: "1.0",
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Service: NewPrivateDebugAPI(s.chainConfig, s),
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}, {
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Namespace: "net",
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Version: "1.0",
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Service: s.netRPCService,
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Public: true,
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},
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}...)
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}
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func (s *Ethereum) ResetWithGenesisBlock(gb *types.Block) {
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s.blockchain.ResetWithGenesisBlock(gb)
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}
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func (s *Ethereum) Etherbase() (eb common.Address, err error) {
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if s.etherbase != (common.Address{}) {
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return s.etherbase, nil
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}
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if wallets := s.AccountManager().Wallets(); len(wallets) > 0 {
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if accounts := wallets[0].Accounts(); len(accounts) > 0 {
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return accounts[0].Address, nil
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}
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}
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return common.Address{}, fmt.Errorf("etherbase address must be explicitly specified")
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}
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// set in js console via admin interface or wrapper from cli flags
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func (self *Ethereum) SetEtherbase(etherbase common.Address) {
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self.etherbase = etherbase
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self.miner.SetEtherbase(etherbase)
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}
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func (s *Ethereum) StartMining() error {
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eb, err := s.Etherbase()
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if err != nil {
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log.Error("Cannot start mining without etherbase", "err", err)
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return fmt.Errorf("etherbase missing: %v", err)
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}
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go s.miner.Start(eb)
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return nil
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}
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func (s *Ethereum) StopMining() { s.miner.Stop() }
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func (s *Ethereum) IsMining() bool { return s.miner.Mining() }
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func (s *Ethereum) Miner() *miner.Miner { return s.miner }
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func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManager }
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func (s *Ethereum) BlockChain() *core.BlockChain { return s.blockchain }
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func (s *Ethereum) TxPool() *core.TxPool { return s.txPool }
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func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux }
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func (s *Ethereum) Engine() consensus.Engine { return s.engine }
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func (s *Ethereum) ChainDb() ethdb.Database { return s.chainDb }
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func (s *Ethereum) IsListening() bool { return true } // Always listening
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func (s *Ethereum) EthVersion() int { return int(s.protocolManager.SubProtocols[0].Version) }
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func (s *Ethereum) NetVersion() int { return s.netVersionId }
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func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
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// Protocols implements node.Service, returning all the currently configured
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// network protocols to start.
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func (s *Ethereum) Protocols() []p2p.Protocol {
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if s.lesServer == nil {
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return s.protocolManager.SubProtocols
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} else {
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return append(s.protocolManager.SubProtocols, s.lesServer.Protocols()...)
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}
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}
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// Start implements node.Service, starting all internal goroutines needed by the
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// Ethereum protocol implementation.
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func (s *Ethereum) Start(srvr *p2p.Server) error {
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s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.NetVersion())
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s.protocolManager.Start()
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if s.lesServer != nil {
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s.lesServer.Start(srvr)
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}
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return nil
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}
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// Stop implements node.Service, terminating all internal goroutines used by the
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// Ethereum protocol.
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func (s *Ethereum) Stop() error {
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if s.stopDbUpgrade != nil {
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s.stopDbUpgrade()
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}
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s.blockchain.Stop()
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s.protocolManager.Stop()
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if s.lesServer != nil {
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s.lesServer.Stop()
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}
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s.txPool.Stop()
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s.miner.Stop()
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s.eventMux.Stop()
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s.chainDb.Close()
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close(s.shutdownChan)
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return nil
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}
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// This function will wait for a shutdown and resumes main thread execution
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func (s *Ethereum) WaitForShutdown() {
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<-s.shutdownChan
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}
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