mirror of https://github.com/poanetwork/quorum.git
768 lines
26 KiB
Go
768 lines
26 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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"errors"
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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/ethdb"
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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/p2p/discover"
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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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const (
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softResponseLimit = 2 * 1024 * 1024 // Target maximum size of returned blocks, headers or node data.
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estHeaderRlpSize = 500 // Approximate size of an RLP encoded block header
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)
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// errIncompatibleConfig is returned if the requested protocols and configs are
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// not compatible (low protocol version restrictions and high requirements).
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var errIncompatibleConfig = errors.New("incompatible configuration")
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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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type ProtocolManager struct {
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networkId int
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fastSync bool
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txpool txPool
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blockchain *core.BlockChain
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chaindb ethdb.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(fastSync bool, networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, blockchain *core.BlockChain, chaindb ethdb.Database) (*ProtocolManager, error) {
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// Figure out whether to allow fast sync or not
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if fastSync && blockchain.CurrentBlock().NumberU64() > 0 {
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glog.V(logger.Info).Infof("blockchain not empty, fast sync disabled")
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fastSync = false
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}
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// Create the protocol manager with the base fields
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manager := &ProtocolManager{
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networkId: networkId,
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fastSync: fastSync,
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eventMux: mux,
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txpool: txpool,
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blockchain: blockchain,
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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, 0, len(ProtocolVersions))
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for i, version := range ProtocolVersions {
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// Skip protocol version if incompatible with the mode of operation
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if fastSync && version < eth63 {
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continue
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}
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// Compatible; initialise the sub-protocol
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version := version // Closure for the run
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manager.SubProtocols = append(manager.SubProtocols, p2p.Protocol{
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Name: ProtocolName,
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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), 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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NodeInfo: func() interface{} {
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return manager.NodeInfo()
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},
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PeerInfo: func(id discover.NodeID) interface{} {
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if p := manager.peers.Peer(fmt.Sprintf("%x", id[:8])); p != nil {
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return p.Info()
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}
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return nil
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},
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})
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}
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if len(manager.SubProtocols) == 0 {
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return nil, errIncompatibleConfig
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}
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// Construct the different synchronisation mechanisms
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manager.downloader = downloader.New(chaindb, manager.eventMux, blockchain.HasHeader, blockchain.HasBlockAndState, blockchain.GetHeader,
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blockchain.GetBlock, blockchain.CurrentHeader, blockchain.CurrentBlock, blockchain.CurrentFastBlock, blockchain.FastSyncCommitHead,
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blockchain.GetTd, blockchain.InsertHeaderChain, blockchain.InsertChain, blockchain.InsertReceiptChain, blockchain.Rollback,
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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.Header(), true, false)
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}
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heighter := func() uint64 {
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return blockchain.CurrentBlock().NumberU64()
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}
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manager.fetcher = fetcher.New(blockchain.GetBlock, validator, manager.BroadcastBlock, heighter, blockchain.InsertChain, manager.removePeer)
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return manager, nil
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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 int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
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return newPeer(pv, 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.blockchain.Status()
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if err := p.Handshake(pm.networkId, 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(),
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p.RequestHashes, p.RequestHashesFromNumber, p.RequestBlocks, p.RequestHeadersByHash,
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p.RequestHeadersByNumber, p.RequestBodies, p.RequestReceipts, p.RequestNodeData); 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.blockchain.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.blockchain.GetBlockByNumber(request.Number + request.Amount - 1)
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if last == nil {
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last = pm.blockchain.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.blockchain.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.blockchain.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.FilterBlocks(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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hashMode := query.Origin.Hash != (common.Hash{})
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// Gather headers 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 header satisfying the query
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var origin *types.Header
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if hashMode {
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origin = pm.blockchain.GetHeader(query.Origin.Hash)
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} else {
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origin = pm.blockchain.GetHeaderByNumber(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)
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bytes += estHeaderRlpSize
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// Advance to the next header 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 header := pm.blockchain.GetHeader(query.Origin.Hash); header != nil {
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query.Origin.Hash = header.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 header := pm.blockchain.GetHeaderByNumber(origin.Number.Uint64() + query.Skip + 1); header != nil {
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if pm.blockchain.GetBlockHashesFromHash(header.Hash(), query.Skip+1)[query.Skip] == query.Origin.Hash {
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query.Origin.Hash = header.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 == BlockHeadersMsg:
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// A batch of headers arrived to one of our previous requests
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var headers []*types.Header
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if err := msg.Decode(&headers); err != nil {
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return errResp(ErrDecode, "msg %v: %v", msg, err)
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}
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// Filter out any explicitly requested headers, deliver the rest to the downloader
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filter := len(headers) == 1
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if filter {
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headers = pm.fetcher.FilterHeaders(headers, time.Now())
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}
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if len(headers) > 0 || !filter {
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err := pm.downloader.DeliverHeaders(p.id, headers)
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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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}
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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 int
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bodies []rlp.RawValue
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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 body, stopping if enough was found
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if data := pm.blockchain.GetBodyRLP(hash); len(data) != 0 {
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bodies = append(bodies, data)
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bytes += len(data)
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}
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}
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return p.SendBlockBodiesRLP(bodies)
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case p.version >= eth62 && msg.Code == BlockBodiesMsg:
|
|
// A batch of block bodies arrived to one of our previous requests
|
|
var request blockBodiesData
|
|
if err := msg.Decode(&request); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Deliver them all to the downloader for queuing
|
|
trasactions := make([][]*types.Transaction, len(request))
|
|
uncles := make([][]*types.Header, len(request))
|
|
|
|
for i, body := range request {
|
|
trasactions[i] = body.Transactions
|
|
uncles[i] = body.Uncles
|
|
}
|
|
// Filter out any explicitly requested bodies, deliver the rest to the downloader
|
|
if trasactions, uncles := pm.fetcher.FilterBodies(trasactions, uncles, time.Now()); len(trasactions) > 0 || len(uncles) > 0 {
|
|
err := pm.downloader.DeliverBodies(p.id, trasactions, uncles)
|
|
if err != nil {
|
|
glog.V(logger.Debug).Infoln(err)
|
|
}
|
|
}
|
|
|
|
case p.version >= eth63 && msg.Code == GetNodeDataMsg:
|
|
// Decode the retrieval message
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
if _, err := msgStream.List(); err != nil {
|
|
return err
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
hash common.Hash
|
|
bytes int
|
|
data [][]byte
|
|
)
|
|
for bytes < softResponseLimit && len(data) < downloader.MaxStateFetch {
|
|
// Retrieve the hash of the next state entry
|
|
if err := msgStream.Decode(&hash); err == rlp.EOL {
|
|
break
|
|
} else if err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Retrieve the requested state entry, stopping if enough was found
|
|
if entry, err := pm.chaindb.Get(hash.Bytes()); err == nil {
|
|
data = append(data, entry)
|
|
bytes += len(entry)
|
|
}
|
|
}
|
|
return p.SendNodeData(data)
|
|
|
|
case p.version >= eth63 && msg.Code == NodeDataMsg:
|
|
// A batch of node state data arrived to one of our previous requests
|
|
var data [][]byte
|
|
if err := msg.Decode(&data); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Deliver all to the downloader
|
|
if err := pm.downloader.DeliverNodeData(p.id, data); err != nil {
|
|
glog.V(logger.Debug).Infof("failed to deliver node state data: %v", err)
|
|
}
|
|
|
|
case p.version >= eth63 && msg.Code == GetReceiptsMsg:
|
|
// Decode the retrieval message
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
if _, err := msgStream.List(); err != nil {
|
|
return err
|
|
}
|
|
// Gather state data until the fetch or network limits is reached
|
|
var (
|
|
hash common.Hash
|
|
bytes int
|
|
receipts []rlp.RawValue
|
|
)
|
|
for bytes < softResponseLimit && len(receipts) < downloader.MaxReceiptFetch {
|
|
// Retrieve the hash of the next block
|
|
if err := msgStream.Decode(&hash); err == rlp.EOL {
|
|
break
|
|
} else if err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Retrieve the requested block's receipts, skipping if unknown to us
|
|
results := core.GetBlockReceipts(pm.chaindb, hash)
|
|
if results == nil {
|
|
if header := pm.blockchain.GetHeader(hash); header == nil || header.ReceiptHash != types.EmptyRootHash {
|
|
continue
|
|
}
|
|
}
|
|
// If known, encode and queue for response packet
|
|
if encoded, err := rlp.EncodeToBytes(results); err != nil {
|
|
glog.V(logger.Error).Infof("failed to encode receipt: %v", err)
|
|
} else {
|
|
receipts = append(receipts, encoded)
|
|
bytes += len(encoded)
|
|
}
|
|
}
|
|
return p.SendReceiptsRLP(receipts)
|
|
|
|
case p.version >= eth63 && msg.Code == ReceiptsMsg:
|
|
// A batch of receipts arrived to one of our previous requests
|
|
var receipts [][]*types.Receipt
|
|
if err := msg.Decode(&receipts); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
// Deliver all to the downloader
|
|
if err := pm.downloader.DeliverReceipts(p.id, receipts); err != nil {
|
|
glog.V(logger.Debug).Infof("failed to deliver receipts: %v", err)
|
|
}
|
|
|
|
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.blockchain.HasBlock(block.Hash) {
|
|
unknown = append(unknown, block)
|
|
}
|
|
}
|
|
for _, block := range unknown {
|
|
if p.version < eth62 {
|
|
pm.fetcher.Notify(p.id, block.Hash, block.Number, time.Now(), p.RequestBlocks, nil, nil)
|
|
} else {
|
|
pm.fetcher.Notify(p.id, block.Hash, block.Number, time.Now(), nil, p.RequestOneHeader, p.RequestBodies)
|
|
}
|
|
}
|
|
|
|
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 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)
|
|
td := pm.blockchain.GetTd(pm.blockchain.CurrentBlock().Hash())
|
|
if request.TD.Cmp(new(big.Int).Add(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())
|
|
}
|
|
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.blockchain.GetBlock(block.ParentHash()); parent != nil {
|
|
td = new(big.Int).Add(block.Difficulty(), pm.blockchain.GetTd(block.ParentHash()))
|
|
} 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.blockchain.HasBlock(hash) {
|
|
for _, peer := range peers {
|
|
if peer.version < eth62 {
|
|
peer.SendNewBlockHashes61([]common.Hash{hash})
|
|
} else {
|
|
peer.SendNewBlockHashes([]common.Hash{hash}, []uint64{block.NumberU64()})
|
|
}
|
|
}
|
|
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.Data.(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.Data.(core.TxPreEvent)
|
|
self.BroadcastTx(event.Tx.Hash(), event.Tx)
|
|
}
|
|
}
|
|
|
|
// EthNodeInfo represents a short summary of the Ethereum sub-protocol metadata known
|
|
// about the host peer.
|
|
type EthNodeInfo struct {
|
|
Network int `json:"network"` // Ethereum network ID (0=Olympic, 1=Frontier, 2=Morden)
|
|
Difficulty *big.Int `json:"difficulty"` // Total difficulty of the host's blockchain
|
|
Genesis string `json:"genesis"` // SHA3 hash of the host's genesis block
|
|
Head string `json:"head"` // SHA3 hash of the host's best owned block
|
|
}
|
|
|
|
// NodeInfo retrieves some protocol metadata about the running host node.
|
|
func (self *ProtocolManager) NodeInfo() *EthNodeInfo {
|
|
return &EthNodeInfo{
|
|
Network: self.networkId,
|
|
Difficulty: self.blockchain.GetTd(self.blockchain.CurrentBlock().Hash()),
|
|
Genesis: fmt.Sprintf("%x", self.blockchain.Genesis().Hash()),
|
|
Head: fmt.Sprintf("%x", self.blockchain.CurrentBlock().Hash()),
|
|
}
|
|
}
|