315 lines
10 KiB
Go
315 lines
10 KiB
Go
// Copyright 2016 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 les
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import (
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"crypto/ecdsa"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/les/flowcontrol"
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"github.com/ethereum/go-ethereum/light"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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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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const bufLimitRatio = 6000 // fixed bufLimit/MRR ratio
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type LesServer struct {
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lesCommons
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archiveMode bool // Flag whether the ethereum node runs in archive mode.
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fcManager *flowcontrol.ClientManager // nil if our node is client only
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costTracker *costTracker
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testCost uint64
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defParams flowcontrol.ServerParams
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lesTopics []discv5.Topic
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privateKey *ecdsa.PrivateKey
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quitSync chan struct{}
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onlyAnnounce bool
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thcNormal, thcBlockProcessing int // serving thread count for normal operation and block processing mode
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maxPeers int
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minCapacity, freeClientCap uint64
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freeClientPool *freeClientPool
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}
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func NewLesServer(e *eth.Ethereum, config *eth.Config) (*LesServer, error) {
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lesTopics := make([]discv5.Topic, len(AdvertiseProtocolVersions))
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for i, pv := range AdvertiseProtocolVersions {
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lesTopics[i] = lesTopic(e.BlockChain().Genesis().Hash(), pv)
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}
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quitSync := make(chan struct{})
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srv := &LesServer{
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lesCommons: lesCommons{
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config: config,
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iConfig: light.DefaultServerIndexerConfig,
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chainDb: e.ChainDb(),
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chtIndexer: light.NewChtIndexer(e.ChainDb(), nil, params.CHTFrequency, params.HelperTrieProcessConfirmations),
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bloomTrieIndexer: light.NewBloomTrieIndexer(e.ChainDb(), nil, params.BloomBitsBlocks, params.BloomTrieFrequency),
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},
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archiveMode: e.ArchiveMode(),
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quitSync: quitSync,
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lesTopics: lesTopics,
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onlyAnnounce: config.OnlyAnnounce,
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}
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srv.costTracker, srv.minCapacity = newCostTracker(e.ChainDb(), config)
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logger := log.New()
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srv.thcNormal = config.LightServ * 4 / 100
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if srv.thcNormal < 4 {
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srv.thcNormal = 4
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}
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srv.thcBlockProcessing = config.LightServ/100 + 1
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srv.fcManager = flowcontrol.NewClientManager(nil, &mclock.System{})
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checkpoint := srv.latestLocalCheckpoint()
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if !checkpoint.Empty() {
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logger.Info("Loaded latest checkpoint", "section", checkpoint.SectionIndex, "head", checkpoint.SectionHead,
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"chtroot", checkpoint.CHTRoot, "bloomroot", checkpoint.BloomRoot)
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}
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srv.chtIndexer.Start(e.BlockChain())
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oracle := config.CheckpointOracle
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if oracle == nil {
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oracle = params.CheckpointOracles[e.BlockChain().Genesis().Hash()]
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}
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registrar := newCheckpointOracle(oracle, srv.getLocalCheckpoint)
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// TODO(rjl493456442) Checkpoint is useless for les server, separate handler for client and server.
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pm, err := NewProtocolManager(e.BlockChain().Config(), nil, light.DefaultServerIndexerConfig, config.ULC, false, config.NetworkId, e.EventMux(), newPeerSet(), e.BlockChain(), e.TxPool(), e.ChainDb(), nil, nil, registrar, quitSync, new(sync.WaitGroup), e.Synced)
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if err != nil {
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return nil, err
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}
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srv.protocolManager = pm
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pm.servingQueue = newServingQueue(int64(time.Millisecond*10), float64(config.LightServ)/100)
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pm.server = srv
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return srv, nil
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}
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func (s *LesServer) APIs() []rpc.API {
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return []rpc.API{
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{
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Namespace: "les",
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Version: "1.0",
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Service: NewPrivateLightAPI(&s.lesCommons, s.protocolManager.reg),
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Public: false,
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},
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}
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}
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// startEventLoop starts an event handler loop that updates the recharge curve of
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// the client manager and adjusts the client pool's size according to the total
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// capacity updates coming from the client manager
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func (s *LesServer) startEventLoop() {
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s.protocolManager.wg.Add(1)
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var (
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processing, procLast bool
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procStarted time.Time
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)
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blockProcFeed := make(chan bool, 100)
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s.protocolManager.blockchain.(*core.BlockChain).SubscribeBlockProcessingEvent(blockProcFeed)
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totalRechargeCh := make(chan uint64, 100)
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totalRecharge := s.costTracker.subscribeTotalRecharge(totalRechargeCh)
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totalCapacityCh := make(chan uint64, 100)
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updateRecharge := func() {
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if processing {
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if !procLast {
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procStarted = time.Now()
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}
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s.protocolManager.servingQueue.setThreads(s.thcBlockProcessing)
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s.fcManager.SetRechargeCurve(flowcontrol.PieceWiseLinear{{0, 0}, {totalRecharge, totalRecharge}})
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} else {
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if procLast {
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blockProcessingTimer.UpdateSince(procStarted)
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}
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s.protocolManager.servingQueue.setThreads(s.thcNormal)
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s.fcManager.SetRechargeCurve(flowcontrol.PieceWiseLinear{{0, 0}, {totalRecharge / 16, totalRecharge / 2}, {totalRecharge / 2, totalRecharge / 2}, {totalRecharge, totalRecharge}})
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}
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procLast = processing
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}
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updateRecharge()
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totalCapacity := s.fcManager.SubscribeTotalCapacity(totalCapacityCh)
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s.freeClientPool.setLimits(s.maxPeers, totalCapacity)
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var maxFreePeers uint64
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go func() {
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for {
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select {
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case processing = <-blockProcFeed:
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updateRecharge()
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case totalRecharge = <-totalRechargeCh:
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updateRecharge()
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case totalCapacity = <-totalCapacityCh:
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totalCapacityGauge.Update(int64(totalCapacity))
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newFreePeers := totalCapacity / s.freeClientCap
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if newFreePeers < maxFreePeers && newFreePeers < uint64(s.maxPeers) {
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log.Warn("Reduced total capacity", "maxFreePeers", newFreePeers)
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}
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maxFreePeers = newFreePeers
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s.freeClientPool.setLimits(s.maxPeers, totalCapacity)
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case <-s.protocolManager.quitSync:
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s.protocolManager.wg.Done()
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return
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}
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}
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}()
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}
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func (s *LesServer) Protocols() []p2p.Protocol {
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return s.makeProtocols(ServerProtocolVersions)
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}
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// Start starts the LES server
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func (s *LesServer) Start(srvr *p2p.Server) {
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s.maxPeers = s.config.LightPeers
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totalRecharge := s.costTracker.totalRecharge()
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if s.maxPeers > 0 {
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s.freeClientCap = s.minCapacity //totalRecharge / uint64(s.maxPeers)
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if s.freeClientCap < s.minCapacity {
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s.freeClientCap = s.minCapacity
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}
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if s.freeClientCap > 0 {
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s.defParams = flowcontrol.ServerParams{
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BufLimit: s.freeClientCap * bufLimitRatio,
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MinRecharge: s.freeClientCap,
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}
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}
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}
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maxCapacity := s.freeClientCap * uint64(s.maxPeers)
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if totalRecharge > maxCapacity {
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maxCapacity = totalRecharge
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}
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s.fcManager.SetCapacityLimits(s.freeClientCap, maxCapacity, s.freeClientCap*2)
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s.freeClientPool = newFreeClientPool(s.chainDb, s.freeClientCap, 10000, mclock.System{}, func(id string) { go s.protocolManager.removePeer(id) })
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s.protocolManager.peers.notify(s.freeClientPool)
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s.startEventLoop()
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s.protocolManager.Start(s.config.LightPeers)
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if srvr.DiscV5 != nil {
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for _, topic := range s.lesTopics {
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topic := topic
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go func() {
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logger := log.New("topic", topic)
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logger.Info("Starting topic registration")
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defer logger.Info("Terminated topic registration")
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srvr.DiscV5.RegisterTopic(topic, s.quitSync)
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}()
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}
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}
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s.privateKey = srvr.PrivateKey
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s.protocolManager.blockLoop()
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}
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func (s *LesServer) SetBloomBitsIndexer(bloomIndexer *core.ChainIndexer) {
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bloomIndexer.AddChildIndexer(s.bloomTrieIndexer)
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}
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// SetClient sets the rpc client and starts running checkpoint contract if it is not yet watched.
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func (s *LesServer) SetContractBackend(backend bind.ContractBackend) {
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if s.protocolManager.reg != nil {
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s.protocolManager.reg.start(backend)
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}
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}
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// Stop stops the LES service
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func (s *LesServer) Stop() {
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s.fcManager.Stop()
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s.chtIndexer.Close()
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// bloom trie indexer is closed by parent bloombits indexer
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go func() {
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<-s.protocolManager.noMorePeers
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}()
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s.freeClientPool.stop()
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s.costTracker.stop()
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s.protocolManager.Stop()
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}
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// todo(rjl493456442) separate client and server implementation.
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func (pm *ProtocolManager) blockLoop() {
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pm.wg.Add(1)
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headCh := make(chan core.ChainHeadEvent, 10)
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headSub := pm.blockchain.SubscribeChainHeadEvent(headCh)
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go func() {
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var lastHead *types.Header
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lastBroadcastTd := common.Big0
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for {
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select {
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case ev := <-headCh:
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peers := pm.peers.AllPeers()
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if len(peers) > 0 {
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header := ev.Block.Header()
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hash := header.Hash()
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number := header.Number.Uint64()
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td := rawdb.ReadTd(pm.chainDb, hash, number)
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if td != nil && td.Cmp(lastBroadcastTd) > 0 {
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var reorg uint64
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if lastHead != nil {
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reorg = lastHead.Number.Uint64() - rawdb.FindCommonAncestor(pm.chainDb, header, lastHead).Number.Uint64()
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}
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lastHead = header
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lastBroadcastTd = td
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log.Debug("Announcing block to peers", "number", number, "hash", hash, "td", td, "reorg", reorg)
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announce := announceData{Hash: hash, Number: number, Td: td, ReorgDepth: reorg}
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var (
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signed bool
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signedAnnounce announceData
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)
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for _, p := range peers {
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p := p
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switch p.announceType {
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case announceTypeSimple:
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p.queueSend(func() { p.SendAnnounce(announce) })
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case announceTypeSigned:
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if !signed {
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signedAnnounce = announce
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signedAnnounce.sign(pm.server.privateKey)
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signed = true
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}
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p.queueSend(func() { p.SendAnnounce(signedAnnounce) })
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}
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}
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}
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}
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case <-pm.quitSync:
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headSub.Unsubscribe()
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pm.wg.Done()
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return
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}
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}
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}()
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}
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