gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

core, consensus: pluggable consensus engines (#3817)

Browse Source 
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.
This commit is contained in:
Péter Szilágyi
2017-04-05 01:16:29 +03:00
committed by Felix Lange
parent e50a5b7771
commit 09777952ee
61 changed files with 1681 additions and 1426 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
eth/backend.go
View File

@ -22,10 +22,11 @@ import (
"math/big"
"regexp"
"sync"
"time"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/consensus"
"github.com/ethereum/go-ethereum/consensus/ethash"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -40,18 +41,9 @@ import (
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/rpc"
)
const (
epochLength = 30000
ethashRevision = 23
autoDAGcheckInterval = 10 * time.Hour
autoDAGepochHeight = epochLength / 2
)
var (
datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
portInUseErrRE = regexp.MustCompile("address already in use")
@ -124,7 +116,7 @@ type Ethereum struct {
chainDb ethdb.Database // Block chain database
eventMux *event.TypeMux
pow pow.PoW
engine consensus.Engine
accountManager *accounts.Manager
ApiBackend *EthApiBackend
@ -163,7 +155,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
chainConfig: chainConfig,
eventMux: ctx.EventMux,
accountManager: ctx.AccountManager,
pow: CreatePoW(ctx, config),
engine: CreateConsensusEngine(ctx, config, chainConfig, chainDb),
shutdownChan: make(chan bool),
stopDbUpgrade: stopDbUpgrade,
netVersionId: config.NetworkId,
@ -186,7 +178,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
}
vmConfig := vm.Config{EnablePreimageRecording: config.EnablePreimageRecording}
eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.pow, eth.eventMux, vmConfig)
eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.engine, eth.eventMux, vmConfig)
if err != nil {
return nil, err
}
@ -211,10 +203,11 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
}
}
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb); err != nil {
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, maxPeers, eth.eventMux, eth.txPool, eth.engine, eth.blockchain, chainDb); err != nil {
return nil, err
}
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.pow)
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.engine)
eth.miner.SetGasPrice(config.GasPrice)
eth.miner.SetExtra(config.ExtraData)
@ -241,20 +234,20 @@ func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Data
return db, err
}
// CreatePoW creates the required type of PoW instance for an Ethereum service
func CreatePoW(ctx *node.ServiceContext, config *Config) pow.PoW {
// CreateConsensusEngine creates the required type of consensus engine instance for an Ethereum service
func CreateConsensusEngine(ctx *node.ServiceContext, config *Config, chainConfig *params.ChainConfig, db ethdb.Database) consensus.Engine {
switch {
case config.PowFake:
log.Warn("Ethash used in fake mode")
return pow.FakePow{}
return ethash.NewFaker()
case config.PowTest:
log.Warn("Ethash used in test mode")
return pow.NewTestEthash()
return ethash.NewTester()
case config.PowShared:
log.Warn("Ethash used in shared mode")
return pow.NewSharedEthash()
return ethash.NewShared()
default:
return pow.NewFullEthash(ctx.ResolvePath(config.EthashCacheDir), config.EthashCachesInMem, config.EthashCachesOnDisk,
return ethash.New(ctx.ResolvePath(config.EthashCacheDir), config.EthashCachesInMem, config.EthashCachesOnDisk,
config.EthashDatasetDir, config.EthashDatasetsInMem, config.EthashDatasetsOnDisk)
}
}
@ -262,7 +255,13 @@ func CreatePoW(ctx *node.ServiceContext, config *Config) pow.PoW {
// APIs returns the collection of RPC services the ethereum package offers.
// NOTE, some of these services probably need to be moved to somewhere else.
func (s *Ethereum) APIs() []rpc.API {
return append(ethapi.GetAPIs(s.ApiBackend, s.solcPath), []rpc.API{
apis := ethapi.GetAPIs(s.ApiBackend, s.solcPath)
// Append any APIs exposed explicitly by the consensus engine
apis = append(apis, s.engine.APIs(s.BlockChain())...)
// Append all the local APIs and return
return append(apis, []rpc.API{
{
Namespace: "eth",
Version: "1.0",
@ -332,13 +331,13 @@ func (self *Ethereum) SetEtherbase(etherbase common.Address) {
self.miner.SetEtherbase(etherbase)
}
func (s *Ethereum) StartMining(threads int) error {
func (s *Ethereum) StartMining() error {
eb, err := s.Etherbase()
if err != nil {
log.Error("Cannot start mining without etherbase", "err", err)
return fmt.Errorf("etherbase missing: %v", err)
}
go s.miner.Start(eb, threads)
go s.miner.Start(eb)
return nil
}
@ -350,7 +349,7 @@ func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManager
func (s *Ethereum) BlockChain() *core.BlockChain { return s.blockchain }
func (s *Ethereum) TxPool() *core.TxPool { return s.txPool }
func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux }
func (s *Ethereum) Pow() pow.PoW { return s.pow }
func (s *Ethereum) Engine() consensus.Engine { return s.engine }
func (s *Ethereum) ChainDb() ethdb.Database { return s.chainDb }
func (s *Ethereum) IsListening() bool { return true } // Always listening
func (s *Ethereum) EthVersion() int { return int(s.protocolManager.SubProtocols[0].Version) }