mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-23 12:07:17 +00:00
652 lines
22 KiB
Go
652 lines
22 KiB
Go
// Copyright 2015 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
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import (
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"fmt"
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"math"
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"math/big"
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"sync"
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"time"
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"github.com/ethereum/go-ethereum/common"
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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/eth/downloader"
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"github.com/ethereum/go-ethereum/eth/fetcher"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/pow"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// This is the target maximum size of returned blocks, headers or node data.
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const softResponseLimit = 2 * 1024 * 1024
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func errResp(code errCode, format string, v ...interface{}) error {
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return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
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}
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type hashFetcherFn func(common.Hash) error
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type blockFetcherFn func([]common.Hash) error
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// extProt is an interface which is passed around so we can expose GetHashes and GetBlock without exposing it to the rest of the protocol
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// extProt is passed around to peers which require to GetHashes and GetBlocks
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type extProt struct {
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getHashes hashFetcherFn
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getBlocks blockFetcherFn
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}
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func (ep extProt) GetHashes(hash common.Hash) error { return ep.getHashes(hash) }
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func (ep extProt) GetBlock(hashes []common.Hash) error { return ep.getBlocks(hashes) }
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type ProtocolManager struct {
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txpool txPool
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chainman *core.ChainManager
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chaindb common.Database
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downloader *downloader.Downloader
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fetcher *fetcher.Fetcher
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peers *peerSet
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SubProtocols []p2p.Protocol
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eventMux *event.TypeMux
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txSub event.Subscription
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minedBlockSub event.Subscription
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// channels for fetcher, syncer, txsyncLoop
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newPeerCh chan *peer
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txsyncCh chan *txsync
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quitSync chan struct{}
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// wait group is used for graceful shutdowns during downloading
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// and processing
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wg sync.WaitGroup
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quit bool
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}
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// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
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// with the ethereum network.
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func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, chainman *core.ChainManager, chaindb common.Database) *ProtocolManager {
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// Create the protocol manager with the base fields
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manager := &ProtocolManager{
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eventMux: mux,
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txpool: txpool,
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chainman: chainman,
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chaindb: chaindb,
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peers: newPeerSet(),
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newPeerCh: make(chan *peer, 1),
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txsyncCh: make(chan *txsync),
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quitSync: make(chan struct{}),
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}
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// Initiate a sub-protocol for every implemented version we can handle
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manager.SubProtocols = make([]p2p.Protocol, len(ProtocolVersions))
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for i := 0; i < len(manager.SubProtocols); i++ {
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version := ProtocolVersions[i]
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manager.SubProtocols[i] = p2p.Protocol{
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Name: "eth",
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Version: version,
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Length: ProtocolLengths[i],
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Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
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peer := manager.newPeer(int(version), networkId, p, rw)
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manager.newPeerCh <- peer
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return manager.handle(peer)
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},
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}
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}
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// Construct the different synchronisation mechanisms
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manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.CurrentBlock, manager.chainman.InsertChain, manager.removePeer)
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validator := func(block *types.Block, parent *types.Block) error {
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return core.ValidateHeader(pow, block.Header(), parent, true)
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}
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heighter := func() uint64 {
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return manager.chainman.CurrentBlock().NumberU64()
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}
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manager.fetcher = fetcher.New(manager.chainman.GetBlock, validator, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
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return manager
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}
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func (pm *ProtocolManager) removePeer(id string) {
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// Short circuit if the peer was already removed
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peer := pm.peers.Peer(id)
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if peer == nil {
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return
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}
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glog.V(logger.Debug).Infoln("Removing peer", id)
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// Unregister the peer from the downloader and Ethereum peer set
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pm.downloader.UnregisterPeer(id)
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if err := pm.peers.Unregister(id); err != nil {
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glog.V(logger.Error).Infoln("Removal failed:", err)
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}
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// Hard disconnect at the networking layer
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if peer != nil {
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peer.Peer.Disconnect(p2p.DiscUselessPeer)
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}
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}
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func (pm *ProtocolManager) Start() {
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// broadcast transactions
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pm.txSub = pm.eventMux.Subscribe(core.TxPreEvent{})
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go pm.txBroadcastLoop()
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// broadcast mined blocks
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pm.minedBlockSub = pm.eventMux.Subscribe(core.NewMinedBlockEvent{})
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go pm.minedBroadcastLoop()
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// start sync handlers
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go pm.syncer()
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go pm.txsyncLoop()
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}
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func (pm *ProtocolManager) Stop() {
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// Showing a log message. During download / process this could actually
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// take between 5 to 10 seconds and therefor feedback is required.
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glog.V(logger.Info).Infoln("Stopping ethereum protocol handler...")
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pm.quit = true
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pm.txSub.Unsubscribe() // quits txBroadcastLoop
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pm.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
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close(pm.quitSync) // quits syncer, fetcher, txsyncLoop
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// Wait for any process action
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pm.wg.Wait()
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glog.V(logger.Info).Infoln("Ethereum protocol handler stopped")
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}
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func (pm *ProtocolManager) newPeer(pv, nv int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
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return newPeer(pv, nv, p, newMeteredMsgWriter(rw))
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}
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// handle is the callback invoked to manage the life cycle of an eth peer. When
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// this function terminates, the peer is disconnected.
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func (pm *ProtocolManager) handle(p *peer) error {
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glog.V(logger.Debug).Infof("%v: peer connected [%s]", p, p.Name())
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// Execute the Ethereum handshake
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td, head, genesis := pm.chainman.Status()
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if err := p.Handshake(td, head, genesis); err != nil {
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glog.V(logger.Debug).Infof("%v: handshake failed: %v", p, err)
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return err
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}
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if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
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rw.Init(p.version)
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}
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// Register the peer locally
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glog.V(logger.Detail).Infof("%v: adding peer", p)
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if err := pm.peers.Register(p); err != nil {
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glog.V(logger.Error).Infof("%v: addition failed: %v", p, err)
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return err
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}
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defer pm.removePeer(p.id)
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// Register the peer in the downloader. If the downloader considers it banned, we disconnect
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if err := pm.downloader.RegisterPeer(p.id, p.version, p.Head(), p.RequestHashes, p.RequestHashesFromNumber, p.RequestBlocks); err != nil {
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return err
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}
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// Propagate existing transactions. new transactions appearing
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// after this will be sent via broadcasts.
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pm.syncTransactions(p)
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// main loop. handle incoming messages.
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for {
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if err := pm.handleMsg(p); err != nil {
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glog.V(logger.Debug).Infof("%v: message handling failed: %v", p, err)
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return err
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}
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}
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return nil
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}
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// handleMsg is invoked whenever an inbound message is received from a remote
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// peer. The remote connection is torn down upon returning any error.
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func (pm *ProtocolManager) handleMsg(p *peer) error {
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// Read the next message from the remote peer, and ensure it's fully consumed
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msg, err := p.rw.ReadMsg()
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if err != nil {
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return err
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}
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if msg.Size > ProtocolMaxMsgSize {
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return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
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}
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defer msg.Discard()
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// Handle the message depending on its contents
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switch {
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case msg.Code == StatusMsg:
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// Status messages should never arrive after the handshake
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return errResp(ErrExtraStatusMsg, "uncontrolled status message")
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case p.version < eth62 && msg.Code == GetBlockHashesMsg:
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// Retrieve the number of hashes to return and from which origin hash
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var request getBlockHashesData
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if err := msg.Decode(&request); err != nil {
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return errResp(ErrDecode, "%v: %v", msg, err)
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}
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if request.Amount > uint64(downloader.MaxHashFetch) {
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request.Amount = uint64(downloader.MaxHashFetch)
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}
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// Retrieve the hashes from the block chain and return them
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hashes := pm.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
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if len(hashes) == 0 {
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glog.V(logger.Debug).Infof("invalid block hash %x", request.Hash.Bytes()[:4])
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}
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return p.SendBlockHashes(hashes)
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case p.version < eth62 && msg.Code == GetBlockHashesFromNumberMsg:
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// Retrieve and decode the number of hashes to return and from which origin number
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var request getBlockHashesFromNumberData
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if err := msg.Decode(&request); err != nil {
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return errResp(ErrDecode, "%v: %v", msg, err)
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}
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if request.Amount > uint64(downloader.MaxHashFetch) {
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request.Amount = uint64(downloader.MaxHashFetch)
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}
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// Calculate the last block that should be retrieved, and short circuit if unavailable
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last := pm.chainman.GetBlockByNumber(request.Number + request.Amount - 1)
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if last == nil {
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last = pm.chainman.CurrentBlock()
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request.Amount = last.NumberU64() - request.Number + 1
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}
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if last.NumberU64() < request.Number {
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return p.SendBlockHashes(nil)
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}
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// Retrieve the hashes from the last block backwards, reverse and return
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hashes := []common.Hash{last.Hash()}
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hashes = append(hashes, pm.chainman.GetBlockHashesFromHash(last.Hash(), request.Amount-1)...)
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for i := 0; i < len(hashes)/2; i++ {
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hashes[i], hashes[len(hashes)-1-i] = hashes[len(hashes)-1-i], hashes[i]
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}
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return p.SendBlockHashes(hashes)
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case p.version < eth62 && msg.Code == BlockHashesMsg:
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// A batch of hashes arrived to one of our previous requests
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var hashes []common.Hash
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if err := msg.Decode(&hashes); err != nil {
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break
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}
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// Deliver them all to the downloader for queuing
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err := pm.downloader.DeliverHashes(p.id, hashes)
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if err != nil {
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glog.V(logger.Debug).Infoln(err)
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}
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case p.version < eth62 && msg.Code == GetBlocksMsg:
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// Decode the retrieval message
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msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
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if _, err := msgStream.List(); err != nil {
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return err
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}
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// Gather blocks until the fetch or network limits is reached
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var (
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hash common.Hash
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bytes common.StorageSize
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blocks []*types.Block
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)
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for len(blocks) < downloader.MaxBlockFetch && bytes < softResponseLimit {
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//Retrieve the hash of the next block
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err := msgStream.Decode(&hash)
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if err == rlp.EOL {
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break
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} else if err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Retrieve the requested block, stopping if enough was found
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if block := pm.chainman.GetBlock(hash); block != nil {
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blocks = append(blocks, block)
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bytes += block.Size()
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}
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}
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return p.SendBlocks(blocks)
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case p.version < eth62 && msg.Code == BlocksMsg:
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// Decode the arrived block message
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var blocks []*types.Block
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if err := msg.Decode(&blocks); err != nil {
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glog.V(logger.Detail).Infoln("Decode error", err)
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blocks = nil
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}
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// Update the receive timestamp of each block
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for _, block := range blocks {
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block.ReceivedAt = msg.ReceivedAt
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}
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// Filter out any explicitly requested blocks, deliver the rest to the downloader
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if blocks := pm.fetcher.Filter(blocks); len(blocks) > 0 {
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pm.downloader.DeliverBlocks(p.id, blocks)
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}
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// Block header query, collect the requested headers and reply
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case p.version >= eth62 && msg.Code == GetBlockHeadersMsg:
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// Decode the complex header query
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var query getBlockHeadersData
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if err := msg.Decode(&query); err != nil {
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return errResp(ErrDecode, "%v: %v", msg, err)
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}
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// Gather blocks until the fetch or network limits is reached
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var (
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bytes common.StorageSize
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headers []*types.Header
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unknown bool
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)
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for !unknown && len(headers) < int(query.Amount) && bytes < softResponseLimit && len(headers) < downloader.MaxHeaderFetch {
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// Retrieve the next block satisfying the query
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var origin *types.Block
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if query.Origin.Hash != (common.Hash{}) {
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origin = pm.chainman.GetBlock(query.Origin.Hash)
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} else {
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origin = pm.chainman.GetBlockByNumber(query.Origin.Number)
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}
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if origin == nil {
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break
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}
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headers = append(headers, origin.Header())
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bytes += origin.Size()
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// Advance to the next block of the query
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switch {
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case query.Origin.Hash != (common.Hash{}) && query.Reverse:
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// Hash based traversal towards the genesis block
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for i := 0; i < int(query.Skip)+1; i++ {
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if block := pm.chainman.GetBlock(query.Origin.Hash); block != nil {
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query.Origin.Hash = block.ParentHash()
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} else {
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unknown = true
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break
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}
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}
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case query.Origin.Hash != (common.Hash{}) && !query.Reverse:
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// Hash based traversal towards the leaf block
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if block := pm.chainman.GetBlockByNumber(origin.NumberU64() + query.Skip + 1); block != nil {
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if pm.chainman.GetBlockHashesFromHash(block.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
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query.Origin.Hash = block.Hash()
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} else {
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unknown = true
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}
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} else {
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unknown = true
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}
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case query.Reverse:
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// Number based traversal towards the genesis block
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if query.Origin.Number >= query.Skip+1 {
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query.Origin.Number -= (query.Skip + 1)
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} else {
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unknown = true
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}
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case !query.Reverse:
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// Number based traversal towards the leaf block
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query.Origin.Number += (query.Skip + 1)
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}
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}
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return p.SendBlockHeaders(headers)
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case p.version >= eth62 && msg.Code == GetBlockBodiesMsg:
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// Decode the retrieval message
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msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
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if _, err := msgStream.List(); err != nil {
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return err
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}
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// Gather blocks until the fetch or network limits is reached
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var (
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hash common.Hash
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bytes common.StorageSize
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bodies []*blockBody
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)
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for bytes < softResponseLimit && len(bodies) < downloader.MaxBlockFetch {
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//Retrieve the hash of the next block
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if err := msgStream.Decode(&hash); err == rlp.EOL {
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break
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} else if err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Retrieve the requested block, stopping if enough was found
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if block := pm.chainman.GetBlock(hash); block != nil {
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bodies = append(bodies, &blockBody{Transactions: block.Transactions(), Uncles: block.Uncles()})
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bytes += block.Size()
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}
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}
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return p.SendBlockBodies(bodies)
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case p.version >= eth63 && msg.Code == GetNodeDataMsg:
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// Decode the retrieval message
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msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
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if _, err := msgStream.List(); err != nil {
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return err
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}
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// Gather state data until the fetch or network limits is reached
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var (
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hash common.Hash
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bytes int
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data [][]byte
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)
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for bytes < softResponseLimit && len(data) < downloader.MaxStateFetch {
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// Retrieve the hash of the next state entry
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if err := msgStream.Decode(&hash); err == rlp.EOL {
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break
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} else if err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Retrieve the requested state entry, stopping if enough was found
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if entry, err := pm.chaindb.Get(hash.Bytes()); err == nil {
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data = append(data, entry)
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bytes += len(entry)
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}
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}
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return p.SendNodeData(data)
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case p.version >= eth63 && msg.Code == GetReceiptsMsg:
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// Decode the retrieval message
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msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
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if _, err := msgStream.List(); err != nil {
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return err
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}
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// Gather state data until the fetch or network limits is reached
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var (
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hash common.Hash
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bytes int
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receipts []*types.Receipt
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)
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for bytes < softResponseLimit && len(receipts) < downloader.MaxReceiptsFetch {
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// Retrieve the hash of the next transaction receipt
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if err := msgStream.Decode(&hash); err == rlp.EOL {
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break
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} else if err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Retrieve the requested receipt, stopping if enough was found
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if receipt := core.GetReceipt(pm.chaindb, hash); receipt != nil {
|
|
receipts = append(receipts, receipt)
|
|
bytes += len(receipt.RlpEncode())
|
|
}
|
|
}
|
|
return p.SendReceipts(receipts)
|
|
|
|
case msg.Code == NewBlockHashesMsg:
|
|
// Retrieve and deseralize the remote new block hashes notification
|
|
type announce struct {
|
|
Hash common.Hash
|
|
Number uint64
|
|
}
|
|
var announces = []announce{}
|
|
|
|
if p.version < eth62 {
|
|
// We're running the old protocol, make block number unknown (0)
|
|
var hashes []common.Hash
|
|
if err := msg.Decode(&hashes); err != nil {
|
|
return errResp(ErrDecode, "%v: %v", msg, err)
|
|
}
|
|
for _, hash := range hashes {
|
|
announces = append(announces, announce{hash, 0})
|
|
}
|
|
} else {
|
|
// Otherwise extract both block hash and number
|
|
var request newBlockHashesData
|
|
if err := msg.Decode(&request); err != nil {
|
|
return errResp(ErrDecode, "%v: %v", msg, err)
|
|
}
|
|
for _, block := range request {
|
|
announces = append(announces, announce{block.Hash, block.Number})
|
|
}
|
|
}
|
|
// Mark the hashes as present at the remote node
|
|
for _, block := range announces {
|
|
p.MarkBlock(block.Hash)
|
|
p.SetHead(block.Hash)
|
|
}
|
|
// Schedule all the unknown hashes for retrieval
|
|
unknown := make([]announce, 0, len(announces))
|
|
for _, block := range announces {
|
|
if !pm.chainman.HasBlock(block.Hash) {
|
|
unknown = append(unknown, block)
|
|
}
|
|
}
|
|
for _, block := range unknown {
|
|
pm.fetcher.Notify(p.id, block.Hash, block.Number, time.Now(), p.RequestBlocks)
|
|
}
|
|
|
|
case msg.Code == NewBlockMsg:
|
|
// Retrieve and decode the propagated block
|
|
var request newBlockData
|
|
if err := msg.Decode(&request); err != nil {
|
|
return errResp(ErrDecode, "%v: %v", msg, err)
|
|
}
|
|
if err := request.Block.ValidateFields(); err != nil {
|
|
return errResp(ErrDecode, "block validation %v: %v", msg, err)
|
|
}
|
|
request.Block.ReceivedAt = msg.ReceivedAt
|
|
|
|
// Mark the block's arrival for whatever reason
|
|
_, chainHead, _ := pm.chainman.Status()
|
|
jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
|
|
BlockHash: request.Block.Hash().Hex(),
|
|
BlockNumber: request.Block.Number(),
|
|
ChainHeadHash: chainHead.Hex(),
|
|
BlockPrevHash: request.Block.ParentHash().Hex(),
|
|
RemoteId: p.ID().String(),
|
|
})
|
|
// Mark the peer as owning the block and schedule it for import
|
|
p.MarkBlock(request.Block.Hash())
|
|
p.SetHead(request.Block.Hash())
|
|
|
|
pm.fetcher.Enqueue(p.id, request.Block)
|
|
|
|
// Update the peers total difficulty if needed, schedule a download if gapped
|
|
if request.TD.Cmp(p.Td()) > 0 {
|
|
p.SetTd(request.TD)
|
|
if request.TD.Cmp(new(big.Int).Add(pm.chainman.Td(), request.Block.Difficulty())) > 0 {
|
|
go pm.synchronise(p)
|
|
}
|
|
}
|
|
|
|
case msg.Code == TxMsg:
|
|
// Transactions arrived, parse all of them and deliver to the pool
|
|
var txs []*types.Transaction
|
|
if err := msg.Decode(&txs); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
for i, tx := range txs {
|
|
// Validate and mark the remote transaction
|
|
if tx == nil {
|
|
return errResp(ErrDecode, "transaction %d is nil", i)
|
|
}
|
|
p.MarkTransaction(tx.Hash())
|
|
|
|
// Log it's arrival for later analysis
|
|
jsonlogger.LogJson(&logger.EthTxReceived{
|
|
TxHash: tx.Hash().Hex(),
|
|
RemoteId: p.ID().String(),
|
|
})
|
|
}
|
|
pm.txpool.AddTransactions(txs)
|
|
|
|
default:
|
|
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// BroadcastBlock will either propagate a block to a subset of it's peers, or
|
|
// will only announce it's availability (depending what's requested).
|
|
func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
|
|
hash := block.Hash()
|
|
peers := pm.peers.PeersWithoutBlock(hash)
|
|
|
|
// If propagation is requested, send to a subset of the peer
|
|
if propagate {
|
|
// Calculate the TD of the block (it's not imported yet, so block.Td is not valid)
|
|
var td *big.Int
|
|
if parent := pm.chainman.GetBlock(block.ParentHash()); parent != nil {
|
|
td = new(big.Int).Add(parent.Td, block.Difficulty())
|
|
} else {
|
|
glog.V(logger.Error).Infof("propagating dangling block #%d [%x]", block.NumberU64(), hash[:4])
|
|
return
|
|
}
|
|
// Send the block to a subset of our peers
|
|
transfer := peers[:int(math.Sqrt(float64(len(peers))))]
|
|
for _, peer := range transfer {
|
|
peer.SendNewBlock(block, td)
|
|
}
|
|
glog.V(logger.Detail).Infof("propagated block %x to %d peers in %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
|
|
}
|
|
// Otherwise if the block is indeed in out own chain, announce it
|
|
if pm.chainman.HasBlock(hash) {
|
|
for _, peer := range peers {
|
|
peer.SendNewBlockHashes([]common.Hash{hash})
|
|
}
|
|
glog.V(logger.Detail).Infof("announced block %x to %d peers in %v", hash[:4], len(peers), time.Since(block.ReceivedAt))
|
|
}
|
|
}
|
|
|
|
// BroadcastTx will propagate a transaction to all peers which are not known to
|
|
// already have the given transaction.
|
|
func (pm *ProtocolManager) BroadcastTx(hash common.Hash, tx *types.Transaction) {
|
|
// Broadcast transaction to a batch of peers not knowing about it
|
|
peers := pm.peers.PeersWithoutTx(hash)
|
|
//FIXME include this again: peers = peers[:int(math.Sqrt(float64(len(peers))))]
|
|
for _, peer := range peers {
|
|
peer.SendTransactions(types.Transactions{tx})
|
|
}
|
|
glog.V(logger.Detail).Infoln("broadcast tx to", len(peers), "peers")
|
|
}
|
|
|
|
// Mined broadcast loop
|
|
func (self *ProtocolManager) minedBroadcastLoop() {
|
|
// automatically stops if unsubscribe
|
|
for obj := range self.minedBlockSub.Chan() {
|
|
switch ev := obj.(type) {
|
|
case core.NewMinedBlockEvent:
|
|
self.BroadcastBlock(ev.Block, true) // First propagate block to peers
|
|
self.BroadcastBlock(ev.Block, false) // Only then announce to the rest
|
|
}
|
|
}
|
|
}
|
|
|
|
func (self *ProtocolManager) txBroadcastLoop() {
|
|
// automatically stops if unsubscribe
|
|
for obj := range self.txSub.Chan() {
|
|
event := obj.(core.TxPreEvent)
|
|
self.BroadcastTx(event.Tx.Hash(), event.Tx)
|
|
}
|
|
}
|