mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 12:57:17 +00:00
433 lines
13 KiB
Go
433 lines
13 KiB
Go
package eth
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/pow"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/eth/downloader"
|
|
"github.com/ethereum/go-ethereum/eth/fetcher"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/logger/glog"
|
|
"github.com/ethereum/go-ethereum/p2p"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
)
|
|
|
|
// This is the target maximum size of returned blocks for the
|
|
// getBlocks message. The reply message may exceed it
|
|
// if a single block is larger than the limit.
|
|
const maxBlockRespSize = 2 * 1024 * 1024
|
|
|
|
func errResp(code errCode, format string, v ...interface{}) error {
|
|
return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
|
|
}
|
|
|
|
type hashFetcherFn func(common.Hash) error
|
|
type blockFetcherFn func([]common.Hash) error
|
|
|
|
// extProt is an interface which is passed around so we can expose GetHashes and GetBlock without exposing it to the rest of the protocol
|
|
// extProt is passed around to peers which require to GetHashes and GetBlocks
|
|
type extProt struct {
|
|
getHashes hashFetcherFn
|
|
getBlocks blockFetcherFn
|
|
}
|
|
|
|
func (ep extProt) GetHashes(hash common.Hash) error { return ep.getHashes(hash) }
|
|
func (ep extProt) GetBlock(hashes []common.Hash) error { return ep.getBlocks(hashes) }
|
|
|
|
type ProtocolManager struct {
|
|
protVer, netId int
|
|
txpool txPool
|
|
chainman *core.ChainManager
|
|
downloader *downloader.Downloader
|
|
fetcher *fetcher.Fetcher
|
|
peers *peerSet
|
|
|
|
SubProtocol p2p.Protocol
|
|
|
|
eventMux *event.TypeMux
|
|
txSub event.Subscription
|
|
minedBlockSub event.Subscription
|
|
|
|
// channels for fetcher, syncer, txsyncLoop
|
|
newPeerCh chan *peer
|
|
txsyncCh chan *txsync
|
|
quitSync chan struct{}
|
|
|
|
// wait group is used for graceful shutdowns during downloading
|
|
// and processing
|
|
wg sync.WaitGroup
|
|
quit bool
|
|
}
|
|
|
|
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
|
|
// with the ethereum network.
|
|
func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, chainman *core.ChainManager) *ProtocolManager {
|
|
// Create the protocol manager and initialize peer handlers
|
|
manager := &ProtocolManager{
|
|
eventMux: mux,
|
|
txpool: txpool,
|
|
chainman: chainman,
|
|
peers: newPeerSet(),
|
|
newPeerCh: make(chan *peer, 1),
|
|
txsyncCh: make(chan *txsync),
|
|
quitSync: make(chan struct{}),
|
|
}
|
|
manager.SubProtocol = p2p.Protocol{
|
|
Name: "eth",
|
|
Version: uint(protocolVersion),
|
|
Length: ProtocolLength,
|
|
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
|
|
peer := manager.newPeer(protocolVersion, networkId, p, rw)
|
|
manager.newPeerCh <- peer
|
|
return manager.handle(peer)
|
|
},
|
|
}
|
|
// Construct the different synchronisation mechanisms
|
|
manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.InsertChain, manager.removePeer)
|
|
|
|
validator := func(block *types.Block, parent *types.Block) error {
|
|
return core.ValidateHeader(pow, block.Header(), parent.Header(), true)
|
|
}
|
|
heighter := func() uint64 {
|
|
return manager.chainman.CurrentBlock().NumberU64()
|
|
}
|
|
manager.fetcher = fetcher.New(manager.chainman.GetBlock, validator, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
|
|
|
|
return manager
|
|
}
|
|
|
|
func (pm *ProtocolManager) removePeer(id string) {
|
|
// Short circuit if the peer was already removed
|
|
peer := pm.peers.Peer(id)
|
|
if peer == nil {
|
|
return
|
|
}
|
|
glog.V(logger.Debug).Infoln("Removing peer", id)
|
|
|
|
// Unregister the peer from the downloader and Ethereum peer set
|
|
pm.downloader.UnregisterPeer(id)
|
|
if err := pm.peers.Unregister(id); err != nil {
|
|
glog.V(logger.Error).Infoln("Removal failed:", err)
|
|
}
|
|
// Hard disconnect at the networking layer
|
|
if peer != nil {
|
|
peer.Peer.Disconnect(p2p.DiscUselessPeer)
|
|
}
|
|
}
|
|
|
|
func (pm *ProtocolManager) Start() {
|
|
// broadcast transactions
|
|
pm.txSub = pm.eventMux.Subscribe(core.TxPreEvent{})
|
|
go pm.txBroadcastLoop()
|
|
// broadcast mined blocks
|
|
pm.minedBlockSub = pm.eventMux.Subscribe(core.NewMinedBlockEvent{})
|
|
go pm.minedBroadcastLoop()
|
|
|
|
// start sync handlers
|
|
go pm.syncer()
|
|
go pm.txsyncLoop()
|
|
}
|
|
|
|
func (pm *ProtocolManager) Stop() {
|
|
// Showing a log message. During download / process this could actually
|
|
// take between 5 to 10 seconds and therefor feedback is required.
|
|
glog.V(logger.Info).Infoln("Stopping ethereum protocol handler...")
|
|
|
|
pm.quit = true
|
|
pm.txSub.Unsubscribe() // quits txBroadcastLoop
|
|
pm.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
|
|
close(pm.quitSync) // quits syncer, fetcher, txsyncLoop
|
|
|
|
// Wait for any process action
|
|
pm.wg.Wait()
|
|
|
|
glog.V(logger.Info).Infoln("Ethereum protocol handler stopped")
|
|
}
|
|
|
|
func (pm *ProtocolManager) newPeer(pv, nv int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
|
|
td, current, genesis := pm.chainman.Status()
|
|
|
|
return newPeer(pv, nv, genesis, current, td, p, rw)
|
|
}
|
|
|
|
func (pm *ProtocolManager) handle(p *peer) error {
|
|
// Execute the Ethereum handshake.
|
|
if err := p.handleStatus(); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Register the peer locally.
|
|
glog.V(logger.Detail).Infoln("Adding peer", p.id)
|
|
if err := pm.peers.Register(p); err != nil {
|
|
glog.V(logger.Error).Infoln("Addition failed:", err)
|
|
return err
|
|
}
|
|
defer pm.removePeer(p.id)
|
|
|
|
// Register the peer in the downloader. If the downloader
|
|
// considers it banned, we disconnect.
|
|
if err := pm.downloader.RegisterPeer(p.id, p.Head(), p.requestHashes, p.requestBlocks); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Propagate existing transactions. new transactions appearing
|
|
// after this will be sent via broadcasts.
|
|
pm.syncTransactions(p)
|
|
|
|
// main loop. handle incoming messages.
|
|
for {
|
|
if err := pm.handleMsg(p); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (pm *ProtocolManager) handleMsg(p *peer) error {
|
|
msg, err := p.rw.ReadMsg()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if msg.Size > ProtocolMaxMsgSize {
|
|
return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, ProtocolMaxMsgSize)
|
|
}
|
|
// make sure that the payload has been fully consumed
|
|
defer msg.Discard()
|
|
|
|
switch msg.Code {
|
|
case StatusMsg:
|
|
return errResp(ErrExtraStatusMsg, "uncontrolled status message")
|
|
|
|
case TxMsg:
|
|
// TODO: rework using lazy RLP stream
|
|
var txs []*types.Transaction
|
|
if err := msg.Decode(&txs); err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
for i, tx := range txs {
|
|
if tx == nil {
|
|
return errResp(ErrDecode, "transaction %d is nil", i)
|
|
}
|
|
jsonlogger.LogJson(&logger.EthTxReceived{
|
|
TxHash: tx.Hash().Hex(),
|
|
RemoteId: p.ID().String(),
|
|
})
|
|
}
|
|
pm.txpool.AddTransactions(txs)
|
|
|
|
case GetBlockHashesMsg:
|
|
var request getBlockHashesMsgData
|
|
if err := msg.Decode(&request); err != nil {
|
|
return errResp(ErrDecode, "->msg %v: %v", msg, err)
|
|
}
|
|
|
|
if request.Amount > uint64(downloader.MaxHashFetch) {
|
|
request.Amount = uint64(downloader.MaxHashFetch)
|
|
}
|
|
|
|
hashes := pm.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
|
|
|
|
if glog.V(logger.Debug) {
|
|
if len(hashes) == 0 {
|
|
glog.Infof("invalid block hash %x", request.Hash.Bytes()[:4])
|
|
}
|
|
}
|
|
|
|
// returns either requested hashes or nothing (i.e. not found)
|
|
return p.sendBlockHashes(hashes)
|
|
|
|
case BlockHashesMsg:
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
|
|
var hashes []common.Hash
|
|
if err := msgStream.Decode(&hashes); err != nil {
|
|
break
|
|
}
|
|
err := pm.downloader.DeliverHashes(p.id, hashes)
|
|
if err != nil {
|
|
glog.V(logger.Debug).Infoln(err)
|
|
}
|
|
|
|
case GetBlocksMsg:
|
|
// Decode the retrieval message
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
if _, err := msgStream.List(); err != nil {
|
|
return err
|
|
}
|
|
// Gather blocks until the fetch or network limits is reached
|
|
var (
|
|
hash common.Hash
|
|
bytes common.StorageSize
|
|
hashes []common.Hash
|
|
blocks []*types.Block
|
|
)
|
|
for {
|
|
err := msgStream.Decode(&hash)
|
|
if err == rlp.EOL {
|
|
break
|
|
} else if err != nil {
|
|
return errResp(ErrDecode, "msg %v: %v", msg, err)
|
|
}
|
|
hashes = append(hashes, hash)
|
|
|
|
// Retrieve the requested block, stopping if enough was found
|
|
if block := pm.chainman.GetBlock(hash); block != nil {
|
|
blocks = append(blocks, block)
|
|
bytes += block.Size()
|
|
if len(blocks) >= downloader.MaxBlockFetch || bytes > maxBlockRespSize {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if glog.V(logger.Detail) && len(blocks) == 0 && len(hashes) > 0 {
|
|
list := "["
|
|
for _, hash := range hashes {
|
|
list += fmt.Sprintf("%x, ", hash[:4])
|
|
}
|
|
list = list[:len(list)-2] + "]"
|
|
|
|
glog.Infof("Peer %s: no blocks found for requested hashes %s", p.id, list)
|
|
}
|
|
return p.sendBlocks(blocks)
|
|
|
|
case BlocksMsg:
|
|
// Decode the arrived block message
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
|
|
var blocks []*types.Block
|
|
if err := msgStream.Decode(&blocks); err != nil {
|
|
glog.V(logger.Detail).Infoln("Decode error", err)
|
|
blocks = nil
|
|
}
|
|
// Update the receive timestamp of each block
|
|
for i:=0; i<len(blocks); i++ {
|
|
blocks[i].ReceivedAt = msg.ReceivedAt
|
|
}
|
|
// Filter out any explicitly requested blocks, deliver the rest to the downloader
|
|
if blocks := pm.fetcher.Filter(blocks); len(blocks) > 0 {
|
|
pm.downloader.DeliverBlocks(p.id, blocks)
|
|
}
|
|
|
|
case NewBlockHashesMsg:
|
|
// Retrieve and deseralize the remote new block hashes notification
|
|
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
|
|
|
|
var hashes []common.Hash
|
|
if err := msgStream.Decode(&hashes); err != nil {
|
|
break
|
|
}
|
|
// Mark the hashes as present at the remote node
|
|
for _, hash := range hashes {
|
|
p.blockHashes.Add(hash)
|
|
p.SetHead(hash)
|
|
}
|
|
// Schedule all the unknown hashes for retrieval
|
|
unknown := make([]common.Hash, 0, len(hashes))
|
|
for _, hash := range hashes {
|
|
if !pm.chainman.HasBlock(hash) {
|
|
unknown = append(unknown, hash)
|
|
}
|
|
}
|
|
for _, hash := range unknown {
|
|
pm.fetcher.Notify(p.id, hash, time.Now(), p.requestBlocks)
|
|
}
|
|
|
|
case NewBlockMsg:
|
|
// Retrieve and decode the propagated block
|
|
var request newBlockMsgData
|
|
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.blockHashes.Add(request.Block.Hash())
|
|
p.SetHead(request.Block.Hash())
|
|
|
|
pm.fetcher.Enqueue(p.id, request.Block)
|
|
|
|
// TODO: Schedule a sync to cover potential gaps (this needs proto update)
|
|
p.SetTd(request.TD)
|
|
go pm.synchronise(p)
|
|
|
|
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 {
|
|
transfer := peers[:int(math.Sqrt(float64(len(peers))))]
|
|
for _, peer := range transfer {
|
|
peer.sendNewBlock(block)
|
|
}
|
|
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 the block to its connected peers. It will sort
|
|
// out which peers do not contain the block in their block set and will do a
|
|
// sqrt(peers) to determine the amount of peers we broadcast to.
|
|
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.sendTransaction(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, false)
|
|
self.BroadcastBlock(ev.Block, true)
|
|
}
|
|
}
|
|
}
|
|
|
|
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)
|
|
}
|
|
}
|