291 lines
9.6 KiB
Go
291 lines
9.6 KiB
Go
// Copyright 2016 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 les implements the Light Ethereum Subprotocol.
|
|
package les
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/accounts"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/common/hexutil"
|
|
"github.com/ethereum/go-ethereum/common/mclock"
|
|
"github.com/ethereum/go-ethereum/consensus"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/core/bloombits"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/eth"
|
|
"github.com/ethereum/go-ethereum/eth/downloader"
|
|
"github.com/ethereum/go-ethereum/eth/filters"
|
|
"github.com/ethereum/go-ethereum/eth/gasprice"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/internal/ethapi"
|
|
"github.com/ethereum/go-ethereum/light"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/node"
|
|
"github.com/ethereum/go-ethereum/p2p"
|
|
"github.com/ethereum/go-ethereum/p2p/discv5"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
rpc "github.com/ethereum/go-ethereum/rpc"
|
|
)
|
|
|
|
type LightEthereum struct {
|
|
lesCommons
|
|
|
|
odr *LesOdr
|
|
relay *LesTxRelay
|
|
chainConfig *params.ChainConfig
|
|
// Channel for shutting down the service
|
|
shutdownChan chan bool
|
|
|
|
// Handlers
|
|
peers *peerSet
|
|
txPool *light.TxPool
|
|
blockchain *light.LightChain
|
|
serverPool *serverPool
|
|
reqDist *requestDistributor
|
|
retriever *retrieveManager
|
|
|
|
bloomRequests chan chan *bloombits.Retrieval // Channel receiving bloom data retrieval requests
|
|
bloomIndexer *core.ChainIndexer
|
|
|
|
ApiBackend *LesApiBackend
|
|
|
|
eventMux *event.TypeMux
|
|
engine consensus.Engine
|
|
accountManager *accounts.Manager
|
|
|
|
networkId uint64
|
|
netRPCService *ethapi.PublicNetAPI
|
|
|
|
wg sync.WaitGroup
|
|
}
|
|
|
|
func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
|
|
chainDb, err := ctx.OpenDatabase("lightchaindata", config.DatabaseCache, config.DatabaseHandles, "eth/db/chaindata/")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
chainConfig, genesisHash, genesisErr := core.SetupGenesisBlockWithOverride(chainDb, config.Genesis, config.ConstantinopleOverride)
|
|
if _, isCompat := genesisErr.(*params.ConfigCompatError); genesisErr != nil && !isCompat {
|
|
return nil, genesisErr
|
|
}
|
|
log.Info("Initialised chain configuration", "config", chainConfig)
|
|
|
|
peers := newPeerSet()
|
|
quitSync := make(chan struct{})
|
|
|
|
leth := &LightEthereum{
|
|
lesCommons: lesCommons{
|
|
chainDb: chainDb,
|
|
config: config,
|
|
iConfig: light.DefaultClientIndexerConfig,
|
|
},
|
|
chainConfig: chainConfig,
|
|
eventMux: ctx.EventMux,
|
|
peers: peers,
|
|
reqDist: newRequestDistributor(peers, quitSync, &mclock.System{}),
|
|
accountManager: ctx.AccountManager,
|
|
engine: eth.CreateConsensusEngine(ctx, chainConfig, &config.Ethash, nil, false, chainDb),
|
|
shutdownChan: make(chan bool),
|
|
networkId: config.NetworkId,
|
|
bloomRequests: make(chan chan *bloombits.Retrieval),
|
|
bloomIndexer: eth.NewBloomIndexer(chainDb, params.BloomBitsBlocksClient, params.HelperTrieConfirmations),
|
|
}
|
|
|
|
var trustedNodes []string
|
|
if leth.config.ULC != nil {
|
|
trustedNodes = leth.config.ULC.TrustedServers
|
|
}
|
|
leth.relay = NewLesTxRelay(peers, leth.reqDist)
|
|
leth.serverPool = newServerPool(chainDb, quitSync, &leth.wg, trustedNodes)
|
|
leth.retriever = newRetrieveManager(peers, leth.reqDist, leth.serverPool)
|
|
|
|
leth.odr = NewLesOdr(chainDb, light.DefaultClientIndexerConfig, leth.retriever)
|
|
leth.chtIndexer = light.NewChtIndexer(chainDb, leth.odr, params.CHTFrequencyClient, params.HelperTrieConfirmations)
|
|
leth.bloomTrieIndexer = light.NewBloomTrieIndexer(chainDb, leth.odr, params.BloomBitsBlocksClient, params.BloomTrieFrequency)
|
|
leth.odr.SetIndexers(leth.chtIndexer, leth.bloomTrieIndexer, leth.bloomIndexer)
|
|
|
|
// Note: NewLightChain adds the trusted checkpoint so it needs an ODR with
|
|
// indexers already set but not started yet
|
|
if leth.blockchain, err = light.NewLightChain(leth.odr, leth.chainConfig, leth.engine); err != nil {
|
|
return nil, err
|
|
}
|
|
// Note: AddChildIndexer starts the update process for the child
|
|
leth.bloomIndexer.AddChildIndexer(leth.bloomTrieIndexer)
|
|
leth.chtIndexer.Start(leth.blockchain)
|
|
leth.bloomIndexer.Start(leth.blockchain)
|
|
|
|
// Rewind the chain in case of an incompatible config upgrade.
|
|
if compat, ok := genesisErr.(*params.ConfigCompatError); ok {
|
|
log.Warn("Rewinding chain to upgrade configuration", "err", compat)
|
|
leth.blockchain.SetHead(compat.RewindTo)
|
|
rawdb.WriteChainConfig(chainDb, genesisHash, chainConfig)
|
|
}
|
|
|
|
leth.txPool = light.NewTxPool(leth.chainConfig, leth.blockchain, leth.relay)
|
|
|
|
if leth.protocolManager, err = NewProtocolManager(
|
|
leth.chainConfig,
|
|
light.DefaultClientIndexerConfig,
|
|
true,
|
|
config.NetworkId,
|
|
leth.eventMux,
|
|
leth.engine,
|
|
leth.peers,
|
|
leth.blockchain,
|
|
nil,
|
|
chainDb,
|
|
leth.odr,
|
|
leth.relay,
|
|
leth.serverPool,
|
|
quitSync,
|
|
&leth.wg,
|
|
config.ULC); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if leth.protocolManager.isULCEnabled() {
|
|
log.Warn("Ultra light client is enabled", "trustedNodes", len(leth.protocolManager.ulc.trustedKeys), "minTrustedFraction", leth.protocolManager.ulc.minTrustedFraction)
|
|
leth.blockchain.DisableCheckFreq()
|
|
}
|
|
leth.ApiBackend = &LesApiBackend{leth, nil}
|
|
|
|
gpoParams := config.GPO
|
|
if gpoParams.Default == nil {
|
|
gpoParams.Default = config.MinerGasPrice
|
|
}
|
|
leth.ApiBackend.gpo = gasprice.NewOracle(leth.ApiBackend, gpoParams)
|
|
return leth, nil
|
|
}
|
|
|
|
func lesTopic(genesisHash common.Hash, protocolVersion uint) discv5.Topic {
|
|
var name string
|
|
switch protocolVersion {
|
|
case lpv1:
|
|
name = "LES"
|
|
case lpv2:
|
|
name = "LES2"
|
|
default:
|
|
panic(nil)
|
|
}
|
|
return discv5.Topic(name + "@" + common.Bytes2Hex(genesisHash.Bytes()[0:8]))
|
|
}
|
|
|
|
type LightDummyAPI struct{}
|
|
|
|
// Etherbase is the address that mining rewards will be send to
|
|
func (s *LightDummyAPI) Etherbase() (common.Address, error) {
|
|
return common.Address{}, fmt.Errorf("mining is not supported in light mode")
|
|
}
|
|
|
|
// Coinbase is the address that mining rewards will be send to (alias for Etherbase)
|
|
func (s *LightDummyAPI) Coinbase() (common.Address, error) {
|
|
return common.Address{}, fmt.Errorf("mining is not supported in light mode")
|
|
}
|
|
|
|
// Hashrate returns the POW hashrate
|
|
func (s *LightDummyAPI) Hashrate() hexutil.Uint {
|
|
return 0
|
|
}
|
|
|
|
// Mining returns an indication if this node is currently mining.
|
|
func (s *LightDummyAPI) Mining() bool {
|
|
return false
|
|
}
|
|
|
|
// 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 *LightEthereum) APIs() []rpc.API {
|
|
return append(ethapi.GetAPIs(s.ApiBackend), []rpc.API{
|
|
{
|
|
Namespace: "eth",
|
|
Version: "1.0",
|
|
Service: &LightDummyAPI{},
|
|
Public: true,
|
|
}, {
|
|
Namespace: "eth",
|
|
Version: "1.0",
|
|
Service: downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
|
|
Public: true,
|
|
}, {
|
|
Namespace: "eth",
|
|
Version: "1.0",
|
|
Service: filters.NewPublicFilterAPI(s.ApiBackend, true),
|
|
Public: true,
|
|
}, {
|
|
Namespace: "net",
|
|
Version: "1.0",
|
|
Service: s.netRPCService,
|
|
Public: true,
|
|
},
|
|
}...)
|
|
}
|
|
|
|
func (s *LightEthereum) ResetWithGenesisBlock(gb *types.Block) {
|
|
s.blockchain.ResetWithGenesisBlock(gb)
|
|
}
|
|
|
|
func (s *LightEthereum) BlockChain() *light.LightChain { return s.blockchain }
|
|
func (s *LightEthereum) TxPool() *light.TxPool { return s.txPool }
|
|
func (s *LightEthereum) Engine() consensus.Engine { return s.engine }
|
|
func (s *LightEthereum) LesVersion() int { return int(ClientProtocolVersions[0]) }
|
|
func (s *LightEthereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
|
|
func (s *LightEthereum) EventMux() *event.TypeMux { return s.eventMux }
|
|
|
|
// Protocols implements node.Service, returning all the currently configured
|
|
// network protocols to start.
|
|
func (s *LightEthereum) Protocols() []p2p.Protocol {
|
|
return s.makeProtocols(ClientProtocolVersions)
|
|
}
|
|
|
|
// Start implements node.Service, starting all internal goroutines needed by the
|
|
// Ethereum protocol implementation.
|
|
func (s *LightEthereum) Start(srvr *p2p.Server) error {
|
|
log.Warn("Light client mode is an experimental feature")
|
|
s.startBloomHandlers(params.BloomBitsBlocksClient)
|
|
s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.networkId)
|
|
// clients are searching for the first advertised protocol in the list
|
|
protocolVersion := AdvertiseProtocolVersions[0]
|
|
s.serverPool.start(srvr, lesTopic(s.blockchain.Genesis().Hash(), protocolVersion))
|
|
s.protocolManager.Start(s.config.LightPeers)
|
|
return nil
|
|
}
|
|
|
|
// Stop implements node.Service, terminating all internal goroutines used by the
|
|
// Ethereum protocol.
|
|
func (s *LightEthereum) Stop() error {
|
|
s.odr.Stop()
|
|
s.bloomIndexer.Close()
|
|
s.chtIndexer.Close()
|
|
s.blockchain.Stop()
|
|
s.protocolManager.Stop()
|
|
s.txPool.Stop()
|
|
s.engine.Close()
|
|
|
|
s.eventMux.Stop()
|
|
|
|
time.Sleep(time.Millisecond * 200)
|
|
s.chainDb.Close()
|
|
close(s.shutdownChan)
|
|
|
|
return nil
|
|
}
|