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core, eth: implement eth/65 transaction fetcher

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rjl493456442 2019-10-28 19:59:07 +08:00 committed by Péter Szilágyi
parent dcffb7777f
commit 049e17116e
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GPG Key ID: E9AE538CEDF8293D
15 changed files with 1344 additions and 211 deletions
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6
core/tx_pool.go
View File

@ -864,6 +864,12 @@ func (pool *TxPool) Get(hash common.Hash) *types.Transaction {
return pool.all.Get(hash)
}
// Has returns an indicator whether txpool has a transaction cached with the
// given hash.
func (pool *TxPool) Has(hash common.Hash) bool {
return pool.all.Get(hash) != nil
}
// removeTx removes a single transaction from the queue, moving all subsequent
// transactions back to the future queue.
func (pool *TxPool) removeTx(hash common.Hash, outofbound bool) {

8
eth/downloader/peer.go
View File

@ -470,7 +470,7 @@ func (ps *peerSet) HeaderIdlePeers() ([]*peerConnection, int) {
defer p.lock.RUnlock()
return p.headerThroughput
}
return ps.idlePeers(62, 64, idle, throughput)
return ps.idlePeers(62, 65, idle, throughput)
}
// BodyIdlePeers retrieves a flat list of all the currently body-idle peers within
@ -484,7 +484,7 @@ func (ps *peerSet) BodyIdlePeers() ([]*peerConnection, int) {
defer p.lock.RUnlock()
return p.blockThroughput
}
return ps.idlePeers(62, 64, idle, throughput)
return ps.idlePeers(62, 65, idle, throughput)
}
// ReceiptIdlePeers retrieves a flat list of all the currently receipt-idle peers
@ -498,7 +498,7 @@ func (ps *peerSet) ReceiptIdlePeers() ([]*peerConnection, int) {
defer p.lock.RUnlock()
return p.receiptThroughput
}
return ps.idlePeers(63, 64, idle, throughput)
return ps.idlePeers(63, 65, idle, throughput)
}
// NodeDataIdlePeers retrieves a flat list of all the currently node-data-idle
@ -512,7 +512,7 @@ func (ps *peerSet) NodeDataIdlePeers() ([]*peerConnection, int) {
defer p.lock.RUnlock()
return p.stateThroughput
}
return ps.idlePeers(63, 64, idle, throughput)
return ps.idlePeers(63, 65, idle, throughput)
}
// idlePeers retrieves a flat list of all currently idle peers satisfying the

129
eth/fetcher/fetcher.go → eth/fetcher/block_fetcher.go
View File

@ -14,7 +14,7 @@
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package fetcher contains the block announcement based synchronisation.
// Package fetcher contains the announcement based blocks or transaction synchronisation.
package fetcher
import (
@ -30,13 +30,16 @@ import (
)
const (
arriveTimeout = 500 * time.Millisecond // Time allowance before an announced block is explicitly requested
arriveTimeout = 500 * time.Millisecond // Time allowance before an announced block/transaction is explicitly requested
gatherSlack = 100 * time.Millisecond // Interval used to collate almost-expired announces with fetches
fetchTimeout = 5 * time.Second // Maximum allotted time to return an explicitly requested block
maxUncleDist = 7 // Maximum allowed backward distance from the chain head
maxQueueDist = 32 // Maximum allowed distance from the chain head to queue
hashLimit = 256 // Maximum number of unique blocks a peer may have announced
blockLimit = 64 // Maximum number of unique blocks a peer may have delivered
fetchTimeout = 5 * time.Second // Maximum allotted time to return an explicitly requested block/transaction
)
const (
maxUncleDist = 7 // Maximum allowed backward distance from the chain head
maxQueueDist = 32 // Maximum allowed distance from the chain head to queue
hashLimit = 256 // Maximum number of unique blocks a peer may have announced
blockLimit = 64 // Maximum number of unique blocks a peer may have delivered
)
var (
@ -67,9 +70,9 @@ type chainInsertFn func(types.Blocks) (int, error)
// peerDropFn is a callback type for dropping a peer detected as malicious.
type peerDropFn func(id string)
// announce is the hash notification of the availability of a new block in the
// blockAnnounce is the hash notification of the availability of a new block in the
// network.
type announce struct {
type blockAnnounce struct {
hash common.Hash // Hash of the block being announced
number uint64 // Number of the block being announced (0 = unknown | old protocol)
header *types.Header // Header of the block partially reassembled (new protocol)
@ -97,18 +100,18 @@ type bodyFilterTask struct {
time time.Time // Arrival time of the blocks' contents
}
// inject represents a schedules import operation.
type inject struct {
// blockInject represents a schedules import operation.
type blockInject struct {
origin string
block *types.Block
}
// Fetcher is responsible for accumulating block announcements from various peers
// BlockFetcher is responsible for accumulating block announcements from various peers
// and scheduling them for retrieval.
type Fetcher struct {
type BlockFetcher struct {
// Various event channels
notify chan *announce
inject chan *inject
notify chan *blockAnnounce
inject chan *blockInject
headerFilter chan chan *headerFilterTask
bodyFilter chan chan *bodyFilterTask
@ -117,16 +120,16 @@ type Fetcher struct {
quit chan struct{}
// Announce states
announces map[string]int // Per peer announce counts to prevent memory exhaustion
announced map[common.Hash][]*announce // Announced blocks, scheduled for fetching
fetching map[common.Hash]*announce // Announced blocks, currently fetching
fetched map[common.Hash][]*announce // Blocks with headers fetched, scheduled for body retrieval
completing map[common.Hash]*announce // Blocks with headers, currently body-completing
announces map[string]int // Per peer blockAnnounce counts to prevent memory exhaustion
announced map[common.Hash][]*blockAnnounce // Announced blocks, scheduled for fetching
fetching map[common.Hash]*blockAnnounce // Announced blocks, currently fetching
fetched map[common.Hash][]*blockAnnounce // Blocks with headers fetched, scheduled for body retrieval
completing map[common.Hash]*blockAnnounce // Blocks with headers, currently body-completing
// Block cache
queue *prque.Prque // Queue containing the import operations (block number sorted)
queues map[string]int // Per peer block counts to prevent memory exhaustion
queued map[common.Hash]*inject // Set of already queued blocks (to dedupe imports)
queue *prque.Prque // Queue containing the import operations (block number sorted)
queues map[string]int // Per peer block counts to prevent memory exhaustion
queued map[common.Hash]*blockInject // Set of already queued blocks (to dedupe imports)
// Callbacks
getBlock blockRetrievalFn // Retrieves a block from the local chain
@ -137,30 +140,30 @@ type Fetcher struct {
dropPeer peerDropFn // Drops a peer for misbehaving
// Testing hooks
announceChangeHook func(common.Hash, bool) // Method to call upon adding or deleting a hash from the announce list
announceChangeHook func(common.Hash, bool) // Method to call upon adding or deleting a hash from the blockAnnounce list
queueChangeHook func(common.Hash, bool) // Method to call upon adding or deleting a block from the import queue
fetchingHook func([]common.Hash) // Method to call upon starting a block (eth/61) or header (eth/62) fetch
completingHook func([]common.Hash) // Method to call upon starting a block body fetch (eth/62)
importedHook func(*types.Block) // Method to call upon successful block import (both eth/61 and eth/62)
}
// New creates a block fetcher to retrieve blocks based on hash announcements.
func New(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
return &Fetcher{
notify: make(chan *announce),
inject: make(chan *inject),
// NewBlockFetcher creates a block fetcher to retrieve blocks based on hash announcements.
func NewBlockFetcher(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *BlockFetcher {
return &BlockFetcher{
notify: make(chan *blockAnnounce),
inject: make(chan *blockInject),
headerFilter: make(chan chan *headerFilterTask),
bodyFilter: make(chan chan *bodyFilterTask),
done: make(chan common.Hash),
quit: make(chan struct{}),
announces: make(map[string]int),
announced: make(map[common.Hash][]*announce),
fetching: make(map[common.Hash]*announce),
fetched: make(map[common.Hash][]*announce),
completing: make(map[common.Hash]*announce),
announced: make(map[common.Hash][]*blockAnnounce),
fetching: make(map[common.Hash]*blockAnnounce),
fetched: make(map[common.Hash][]*blockAnnounce),
completing: make(map[common.Hash]*blockAnnounce),
queue: prque.New(nil),
queues: make(map[string]int),
queued: make(map[common.Hash]*inject),
queued: make(map[common.Hash]*blockInject),
getBlock: getBlock,
verifyHeader: verifyHeader,
broadcastBlock: broadcastBlock,
@ -172,21 +175,21 @@ func New(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBloc
// Start boots up the announcement based synchroniser, accepting and processing
// hash notifications and block fetches until termination requested.
func (f *Fetcher) Start() {
func (f *BlockFetcher) Start() {
go f.loop()
}
// Stop terminates the announcement based synchroniser, canceling all pending
// operations.
func (f *Fetcher) Stop() {
func (f *BlockFetcher) Stop() {
close(f.quit)
}
// Notify announces the fetcher of the potential availability of a new block in
// the network.
func (f *Fetcher) Notify(peer string, hash common.Hash, number uint64, time time.Time,
func (f *BlockFetcher) Notify(peer string, hash common.Hash, number uint64, time time.Time,
headerFetcher headerRequesterFn, bodyFetcher bodyRequesterFn) error {
block := &announce{
block := &blockAnnounce{
hash: hash,
number: number,
time: time,
@ -203,8 +206,8 @@ func (f *Fetcher) Notify(peer string, hash common.Hash, number uint64, time time
}
// Enqueue tries to fill gaps the fetcher's future import queue.
func (f *Fetcher) Enqueue(peer string, block *types.Block) error {
op := &inject{
func (f *BlockFetcher) Enqueue(peer string, block *types.Block) error {
op := &blockInject{
origin: peer,
block: block,
}
@ -218,7 +221,7 @@ func (f *Fetcher) Enqueue(peer string, block *types.Block) error {
// FilterHeaders extracts all the headers that were explicitly requested by the fetcher,
// returning those that should be handled differently.
func (f *Fetcher) FilterHeaders(peer string, headers []*types.Header, time time.Time) []*types.Header {
func (f *BlockFetcher) FilterHeaders(peer string, headers []*types.Header, time time.Time) []*types.Header {
log.Trace("Filtering headers", "peer", peer, "headers", len(headers))
// Send the filter channel to the fetcher
@ -246,7 +249,7 @@ func (f *Fetcher) FilterHeaders(peer string, headers []*types.Header, time time.
// FilterBodies extracts all the block bodies that were explicitly requested by
// the fetcher, returning those that should be handled differently.
func (f *Fetcher) FilterBodies(peer string, transactions [][]*types.Transaction, uncles [][]*types.Header, time time.Time) ([][]*types.Transaction, [][]*types.Header) {
func (f *BlockFetcher) FilterBodies(peer string, transactions [][]*types.Transaction, uncles [][]*types.Header, time time.Time) ([][]*types.Transaction, [][]*types.Header) {
log.Trace("Filtering bodies", "peer", peer, "txs", len(transactions), "uncles", len(uncles))
// Send the filter channel to the fetcher
@ -274,7 +277,7 @@ func (f *Fetcher) FilterBodies(peer string, transactions [][]*types.Transaction,
// Loop is the main fetcher loop, checking and processing various notification
// events.
func (f *Fetcher) loop() {
func (f *BlockFetcher) loop() {
// Iterate the block fetching until a quit is requested
fetchTimer := time.NewTimer(0)
completeTimer := time.NewTimer(0)
@ -289,7 +292,7 @@ func (f *Fetcher) loop() {
// Import any queued blocks that could potentially fit
height := f.chainHeight()
for !f.queue.Empty() {
op := f.queue.PopItem().(*inject)
op := f.queue.PopItem().(*blockInject)
hash := op.block.Hash()
if f.queueChangeHook != nil {
f.queueChangeHook(hash, false)
@ -313,24 +316,24 @@ func (f *Fetcher) loop() {
// Wait for an outside event to occur
select {
case <-f.quit:
// Fetcher terminating, abort all operations
// BlockFetcher terminating, abort all operations
return
case notification := <-f.notify:
// A block was announced, make sure the peer isn't DOSing us
propAnnounceInMeter.Mark(1)
blockAnnounceInMeter.Mark(1)
count := f.announces[notification.origin] + 1
if count > hashLimit {
log.Debug("Peer exceeded outstanding announces", "peer", notification.origin, "limit", hashLimit)
propAnnounceDOSMeter.Mark(1)
blockAnnounceDOSMeter.Mark(1)
break
}
// If we have a valid block number, check that it's potentially useful
if notification.number > 0 {
if dist := int64(notification.number) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
log.Debug("Peer discarded announcement", "peer", notification.origin, "number", notification.number, "hash", notification.hash, "distance", dist)
propAnnounceDropMeter.Mark(1)
blockAnnounceDropMeter.Mark(1)
break
}
}
@ -352,7 +355,7 @@ func (f *Fetcher) loop() {
case op := <-f.inject:
// A direct block insertion was requested, try and fill any pending gaps
propBroadcastInMeter.Mark(1)
blockBroadcastInMeter.Mark(1)
f.enqueue(op.origin, op.block)
case hash := <-f.done:
@ -439,7 +442,7 @@ func (f *Fetcher) loop() {
// Split the batch of headers into unknown ones (to return to the caller),
// known incomplete ones (requiring body retrievals) and completed blocks.
unknown, incomplete, complete := []*types.Header{}, []*announce{}, []*types.Block{}
unknown, incomplete, complete := []*types.Header{}, []*blockAnnounce{}, []*types.Block{}
for _, header := range task.headers {
hash := header.Hash()
@ -475,7 +478,7 @@ func (f *Fetcher) loop() {
f.forgetHash(hash)
}
} else {
// Fetcher doesn't know about it, add to the return list
// BlockFetcher doesn't know about it, add to the return list
unknown = append(unknown, header)
}
}
@ -562,8 +565,8 @@ func (f *Fetcher) loop() {
}
}
// rescheduleFetch resets the specified fetch timer to the next announce timeout.
func (f *Fetcher) rescheduleFetch(fetch *time.Timer) {
// rescheduleFetch resets the specified fetch timer to the next blockAnnounce timeout.
func (f *BlockFetcher) rescheduleFetch(fetch *time.Timer) {
// Short circuit if no blocks are announced
if len(f.announced) == 0 {
return
@ -579,7 +582,7 @@ func (f *Fetcher) rescheduleFetch(fetch *time.Timer) {
}
// rescheduleComplete resets the specified completion timer to the next fetch timeout.
func (f *Fetcher) rescheduleComplete(complete *time.Timer) {
func (f *BlockFetcher) rescheduleComplete(complete *time.Timer) {
// Short circuit if no headers are fetched
if len(f.fetched) == 0 {
return
@ -596,27 +599,27 @@ func (f *Fetcher) rescheduleComplete(complete *time.Timer) {
// enqueue schedules a new future import operation, if the block to be imported
// has not yet been seen.
func (f *Fetcher) enqueue(peer string, block *types.Block) {
func (f *BlockFetcher) enqueue(peer string, block *types.Block) {
hash := block.Hash()
// Ensure the peer isn't DOSing us
count := f.queues[peer] + 1
if count > blockLimit {
log.Debug("Discarded propagated block, exceeded allowance", "peer", peer, "number", block.Number(), "hash", hash, "limit", blockLimit)
propBroadcastDOSMeter.Mark(1)
blockBroadcastDOSMeter.Mark(1)
f.forgetHash(hash)
return
}
// Discard any past or too distant blocks
if dist := int64(block.NumberU64()) - int64(f.chainHeight()); dist < -maxUncleDist || dist > maxQueueDist {
log.Debug("Discarded propagated block, too far away", "peer", peer, "number", block.Number(), "hash", hash, "distance", dist)
propBroadcastDropMeter.Mark(1)
blockBroadcastDropMeter.Mark(1)
f.forgetHash(hash)
return
}
// Schedule the block for future importing
if _, ok := f.queued[hash]; !ok {
op := &inject{
op := &blockInject{
origin: peer,
block: block,
}
@ -633,7 +636,7 @@ func (f *Fetcher) enqueue(peer string, block *types.Block) {
// insert spawns a new goroutine to run a block insertion into the chain. If the
// block's number is at the same height as the current import phase, it updates
// the phase states accordingly.
func (f *Fetcher) insert(peer string, block *types.Block) {
func (f *BlockFetcher) insert(peer string, block *types.Block) {
hash := block.Hash()
// Run the import on a new thread
@ -651,7 +654,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
switch err := f.verifyHeader(block.Header()); err {
case nil:
// All ok, quickly propagate to our peers
propBroadcastOutTimer.UpdateSince(block.ReceivedAt)
blockBroadcastOutTimer.UpdateSince(block.ReceivedAt)
go f.broadcastBlock(block, true)
case consensus.ErrFutureBlock:
@ -669,7 +672,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
return
}
// If import succeeded, broadcast the block
propAnnounceOutTimer.UpdateSince(block.ReceivedAt)
blockAnnounceOutTimer.UpdateSince(block.ReceivedAt)
go f.broadcastBlock(block, false)
// Invoke the testing hook if needed
@ -681,7 +684,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
// forgetHash removes all traces of a block announcement from the fetcher's
// internal state.
func (f *Fetcher) forgetHash(hash common.Hash) {
func (f *BlockFetcher) forgetHash(hash common.Hash) {
// Remove all pending announces and decrement DOS counters
for _, announce := range f.announced[hash] {
f.announces[announce.origin]--
@ -723,7 +726,7 @@ func (f *Fetcher) forgetHash(hash common.Hash) {
// forgetBlock removes all traces of a queued block from the fetcher's internal
// state.
func (f *Fetcher) forgetBlock(hash common.Hash) {
func (f *BlockFetcher) forgetBlock(hash common.Hash) {
if insert := f.queued[hash]; insert != nil {
f.queues[insert.origin]--
if f.queues[insert.origin] == 0 {

4
eth/fetcher/fetcher_test.go → eth/fetcher/block_fetcher_test.go
View File

@ -76,7 +76,7 @@ func makeChain(n int, seed byte, parent *types.Block) ([]common.Hash, map[common
// fetcherTester is a test simulator for mocking out local block chain.
type fetcherTester struct {
fetcher *Fetcher
fetcher *BlockFetcher
hashes []common.Hash // Hash chain belonging to the tester
blocks map[common.Hash]*types.Block // Blocks belonging to the tester
@ -92,7 +92,7 @@ func newTester() *fetcherTester {
blocks: map[common.Hash]*types.Block{genesis.Hash(): genesis},
drops: make(map[string]bool),
}
tester.fetcher = New(tester.getBlock, tester.verifyHeader, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher = NewBlockFetcher(tester.getBlock, tester.verifyHeader, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher.Start()
return tester

27
eth/fetcher/metrics.go
View File

@ -23,15 +23,15 @@ import (
)
var (
propAnnounceInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/announces/in", nil)
propAnnounceOutTimer = metrics.NewRegisteredTimer("eth/fetcher/prop/announces/out", nil)
propAnnounceDropMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/announces/drop", nil)
propAnnounceDOSMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/announces/dos", nil)
blockAnnounceInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/announces/in", nil)
blockAnnounceOutTimer = metrics.NewRegisteredTimer("eth/fetcher/prop/block/announces/out", nil)
blockAnnounceDropMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/announces/drop", nil)
blockAnnounceDOSMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/announces/dos", nil)
propBroadcastInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/broadcasts/in", nil)
propBroadcastOutTimer = metrics.NewRegisteredTimer("eth/fetcher/prop/broadcasts/out", nil)
propBroadcastDropMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/broadcasts/drop", nil)
propBroadcastDOSMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/broadcasts/dos", nil)
blockBroadcastInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/broadcasts/in", nil)
blockBroadcastOutTimer = metrics.NewRegisteredTimer("eth/fetcher/prop/block/broadcasts/out", nil)
blockBroadcastDropMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/broadcasts/drop", nil)
blockBroadcastDOSMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/block/broadcasts/dos", nil)
headerFetchMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/headers", nil)
bodyFetchMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/bodies", nil)
@ -40,4 +40,15 @@ var (
headerFilterOutMeter = metrics.NewRegisteredMeter("eth/fetcher/filter/headers/out", nil)
bodyFilterInMeter = metrics.NewRegisteredMeter("eth/fetcher/filter/bodies/in", nil)
bodyFilterOutMeter = metrics.NewRegisteredMeter("eth/fetcher/filter/bodies/out", nil)
txAnnounceInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/transaction/announces/in", nil)
txAnnounceDOSMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/transaction/announces/dos", nil)
txAnnounceSkipMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/transaction/announces/skip", nil)
txAnnounceUnderpriceMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/transaction/announces/underprice", nil)
txBroadcastInMeter = metrics.NewRegisteredMeter("eth/fetcher/prop/transaction/broadcasts/in", nil)
txFetchOutMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/transaction/out", nil)
txFetchSuccessMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/transaction/success", nil)
txFetchTimeoutMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/transaction/timeout", nil)
txFetchInvalidMeter = metrics.NewRegisteredMeter("eth/fetcher/fetch/transaction/invalid", nil)
txFetchDurationTimer = metrics.NewRegisteredTimer("eth/fetcher/fetch/transaction/duration", nil)
)

319
eth/fetcher/tx_fetcher.go Normal file
View File

@ -0,0 +1,319 @@
// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package fetcher
import (
"math/rand"
"time"
mapset "github.com/deckarep/golang-set"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/log"
)
var (
// txAnnounceLimit is the maximum number of unique transaction a peer
// can announce in a short time.
txAnnounceLimit = 4096
// txFetchTimeout is the maximum allotted time to return an explicitly
// requested transaction.
txFetchTimeout = 5 * time.Second
// MaxTransactionFetch is the maximum transaction number can be fetched
// in one request. The rationale to pick this value is:
// In eth protocol, the softResponseLimit is 2MB. Nowdays according to
// Etherscan the average transaction size is around 200B, so in theory
// we can include lots of transaction in a single protocol packet. However
// the maximum size of a single transaction is raised to 128KB, so pick
// a middle value here to ensure we can maximize the efficiency of the
// retrieval and response size overflow won't happen in most cases.
MaxTransactionFetch = 256
// underpriceSetSize is the size of underprice set which used for maintaining
// the set of underprice transactions.
underpriceSetSize = 4096
)
// txAnnounce is the notification of the availability of a single
// new transaction in the network.
type txAnnounce struct {
origin string // Identifier of the peer originating the notification
time time.Time // Timestamp of the announcement
fetchTxs func([]common.Hash) // Callback for retrieving transaction from specified peer
}
// txsAnnounce is the notification of the availability of a batch
// of new transactions in the network.
type txsAnnounce struct {
hashes []common.Hash // Batch of transaction hashes being announced
origin string // Identifier of the peer originating the notification
time time.Time // Timestamp of the announcement
fetchTxs func([]common.Hash) // Callback for retrieving transaction from specified peer
}
// TxFetcher is responsible for retrieving new transaction based
// on the announcement.
type TxFetcher struct {
notify chan *txsAnnounce
cleanup chan []common.Hash
quit chan struct{}
// Announce states
announces map[string]int // Per peer transaction announce counts to prevent memory exhaustion
announced map[common.Hash][]*txAnnounce // Announced transactions, scheduled for fetching
fetching map[common.Hash]*txAnnounce // Announced transactions, currently fetching
underpriced mapset.Set // Transaction set whose price is too low for accepting
// Callbacks
hasTx func(common.Hash) bool // Retrieves a tx from the local txpool
addTxs func([]*types.Transaction) []error // Insert a batch of transactions into local txpool
dropPeer func(string) // Drop the specified peer
// Hooks
announceHook func([]common.Hash) // Hook which is called when a batch transactions are announced
importTxsHook func([]*types.Transaction) // Hook which is called when a batch of transactions are imported.
dropHook func(string) // Hook which is called when a peer is dropped
cleanupHook func([]common.Hash) // Hook which is called when internal status is cleaned
rejectUnderprice func(common.Hash) // Hook which is called when underprice transaction is rejected
}
// NewTxFetcher creates a transaction fetcher to retrieve transaction
// based on hash announcements.
func NewTxFetcher(hasTx func(common.Hash) bool, addTxs func([]*types.Transaction) []error, dropPeer func(string)) *TxFetcher {
return &TxFetcher{
notify: make(chan *txsAnnounce),
cleanup: make(chan []common.Hash),
quit: make(chan struct{}),
announces: make(map[string]int),
announced: make(map[common.Hash][]*txAnnounce),
fetching: make(map[common.Hash]*txAnnounce),
underpriced: mapset.NewSet(),
hasTx: hasTx,
addTxs: addTxs,
dropPeer: dropPeer,
}
}
// Notify announces the fetcher of the potential availability of a
// new transaction in the network.
func (f *TxFetcher) Notify(peer string, hashes []common.Hash, time time.Time, fetchTxs func([]common.Hash)) error {
announce := &txsAnnounce{
hashes: hashes,
time: time,
origin: peer,
fetchTxs: fetchTxs,
}
select {
case f.notify <- announce:
return nil
case <-f.quit:
return errTerminated
}
}
// EnqueueTxs imports a batch of received transaction into fetcher.
func (f *TxFetcher) EnqueueTxs(peer string, txs []*types.Transaction) error {
var (
drop bool
hashes []common.Hash
)
errs := f.addTxs(txs)
for i, err := range errs {
if err != nil {
// Drop peer if the received transaction isn't signed properly.
drop = (drop || err == core.ErrInvalidSender)
txFetchInvalidMeter.Mark(1)
// Track the transaction hash if the price is too low for us.
// Avoid re-request this transaction when we receive another
// announcement.
if err == core.ErrUnderpriced {
for f.underpriced.Cardinality() >= underpriceSetSize {
f.underpriced.Pop()
}
f.underpriced.Add(txs[i].Hash())
}
}
hashes = append(hashes, txs[i].Hash())
}
if f.importTxsHook != nil {
f.importTxsHook(txs)
}
// Drop the peer if some transaction failed signature verification.
// We can regard this peer is trying to DOS us by feeding lots of
// random hashes.
if drop {
f.dropPeer(peer)
if f.dropHook != nil {
f.dropHook(peer)
}
}
select {
case f.cleanup <- hashes:
return nil
case <-f.quit:
return errTerminated
}
}
// Start boots up the announcement based synchroniser, accepting and processing
// hash notifications and block fetches until termination requested.
func (f *TxFetcher) Start() {
go f.loop()
}
// Stop terminates the announcement based synchroniser, canceling all pending
// operations.
func (f *TxFetcher) Stop() {
close(f.quit)
}
func (f *TxFetcher) loop() {
fetchTimer := time.NewTimer(0)
for {
// Clean up any expired transaction fetches.
// There are many cases can lead to it:
// * We send the request to busy peer which can reply immediately
// * We send the request to malicious peer which doesn't reply deliberately
// * We send the request to normal peer for a batch of transaction, but some
// transactions have been included into blocks. According to EIP these txs
// won't be included.
// But it's fine to delete the fetching record and reschedule fetching iff we
// receive the annoucement again.
for hash, announce := range f.fetching {
if time.Since(announce.time) > txFetchTimeout {
delete(f.fetching, hash)
txFetchTimeoutMeter.Mark(1)
}
}
select {
case anno := <-f.notify:
txAnnounceInMeter.Mark(int64(len(anno.hashes)))
// Drop the new announce if there are too many accumulated.
count := f.announces[anno.origin] + len(anno.hashes)
if count > txAnnounceLimit {
txAnnounceDOSMeter.Mark(int64(count - txAnnounceLimit))
break
}
f.announces[anno.origin] = count
// All is well, schedule the announce if transaction is not yet downloading
empty := len(f.announced) == 0
for _, hash := range anno.hashes {
if _, ok := f.fetching[hash]; ok {
continue
}
if f.underpriced.Contains(hash) {
txAnnounceUnderpriceMeter.Mark(1)
if f.rejectUnderprice != nil {
f.rejectUnderprice(hash)
}
continue
}
f.announced[hash] = append(f.announced[hash], &txAnnounce{
origin: anno.origin,
time: anno.time,
fetchTxs: anno.fetchTxs,
})
}
if empty && len(f.announced) > 0 {
f.reschedule(fetchTimer)
}
if f.announceHook != nil {
f.announceHook(anno.hashes)
}
case <-fetchTimer.C:
// At least one tx's timer ran out, check for needing retrieval
request := make(map[string][]common.Hash)
for hash, announces := range f.announced {
if time.Since(announces[0].time) > arriveTimeout-gatherSlack {
// Pick a random peer to retrieve from, reset all others
announce := announces[rand.Intn(len(announces))]
f.forgetHash(hash)
// Skip fetching if we already receive the transaction.
if f.hasTx(hash) {
txAnnounceSkipMeter.Mark(1)
continue
}
// If the transaction still didn't arrive, queue for fetching
request[announce.origin] = append(request[announce.origin], hash)
f.fetching[hash] = announce
}
}
// Send out all block header requests
for peer, hashes := range request {
log.Trace("Fetching scheduled transactions", "peer", peer, "txs", hashes)
fetchTxs := f.fetching[hashes[0]].fetchTxs
fetchTxs(hashes)
txFetchOutMeter.Mark(int64(len(hashes)))
}
// Schedule the next fetch if blocks are still pending
f.reschedule(fetchTimer)
case hashes := <-f.cleanup:
for _, hash := range hashes {
f.forgetHash(hash)
anno, exist := f.fetching[hash]
if !exist {
txBroadcastInMeter.Mark(1) // Directly transaction propagation
continue
}
txFetchDurationTimer.UpdateSince(anno.time)
txFetchSuccessMeter.Mark(1)
delete(f.fetching, hash)
}
if f.cleanupHook != nil {
f.cleanupHook(hashes)
}
case <-f.quit:
return
}
}
}
// rescheduleFetch resets the specified fetch timer to the next blockAnnounce timeout.
func (f *TxFetcher) reschedule(fetch *time.Timer) {
// Short circuit if no transactions are announced
if len(f.announced) == 0 {
return
}
// Otherwise find the earliest expiring announcement
earliest := time.Now()
for _, announces := range f.announced {
if earliest.After(announces[0].time) {
earliest = announces[0].time
}
}
fetch.Reset(arriveTimeout - time.Since(earliest))
}
func (f *TxFetcher) forgetHash(hash common.Hash) {
// Remove all pending announces and decrement DOS counters
for _, announce := range f.announced[hash] {
f.announces[announce.origin]--
if f.announces[announce.origin] <= 0 {
delete(f.announces, announce.origin)
}
}
delete(f.announced, hash)
}

318
eth/fetcher/tx_fetcher_test.go Normal file
View File

@ -0,0 +1,318 @@
// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package fetcher
import (
"crypto/ecdsa"
"math/big"
"math/rand"
"sync"
"sync/atomic"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
)
func init() {
rand.Seed(int64(time.Now().Nanosecond()))
txAnnounceLimit = 64
MaxTransactionFetch = 16
}
func makeTransactions(key *ecdsa.PrivateKey, target int) []*types.Transaction {
var txs []*types.Transaction
for i := 0; i < target; i++ {
random := rand.Uint32()
tx := types.NewTransaction(uint64(random), common.Address{0x1, 0x2, 0x3}, big.NewInt(int64(random)), 100, big.NewInt(int64(random)), nil)
tx, _ = types.SignTx(tx, types.NewEIP155Signer(big.NewInt(1)), key)
txs = append(txs, tx)
}
return txs
}
func makeUnsignedTransactions(key *ecdsa.PrivateKey, target int) []*types.Transaction {
var txs []*types.Transaction
for i := 0; i < target; i++ {
random := rand.Uint32()
tx := types.NewTransaction(uint64(random), common.Address{0x1, 0x2, 0x3}, big.NewInt(int64(random)), 100, big.NewInt(int64(random)), nil)
txs = append(txs, tx)
}
return txs
}
type txfetcherTester struct {
fetcher *TxFetcher
priceLimit *big.Int
sender *ecdsa.PrivateKey
senderAddr common.Address
signer types.Signer
txs map[common.Hash]*types.Transaction
dropped map[string]struct{}
lock sync.RWMutex
}
func newTxFetcherTester() *txfetcherTester {
key, _ := crypto.GenerateKey()
addr := crypto.PubkeyToAddress(key.PublicKey)
t := &txfetcherTester{
sender: key,
senderAddr: addr,
signer: types.NewEIP155Signer(big.NewInt(1)),
txs: make(map[common.Hash]*types.Transaction),
dropped: make(map[string]struct{}),
}
t.fetcher = NewTxFetcher(t.hasTx, t.addTxs, t.dropPeer)
t.fetcher.Start()
return t
}
func (t *txfetcherTester) hasTx(hash common.Hash) bool {
t.lock.RLock()
defer t.lock.RUnlock()
return t.txs[hash] != nil
}
func (t *txfetcherTester) addTxs(txs []*types.Transaction) []error {
t.lock.Lock()
defer t.lock.Unlock()
var errors []error
for _, tx := range txs {
// Make sure the transaction is signed properly
_, err := types.Sender(t.signer, tx)
if err != nil {
errors = append(errors, core.ErrInvalidSender)
continue
}
// Make sure the price is high enough to accpet
if t.priceLimit != nil && tx.GasPrice().Cmp(t.priceLimit) < 0 {
errors = append(errors, core.ErrUnderpriced)
continue
}
t.txs[tx.Hash()] = tx
errors = append(errors, nil)
}
return errors
}
func (t *txfetcherTester) dropPeer(id string) {
t.lock.Lock()
defer t.lock.Unlock()
t.dropped[id] = struct{}{}
}
// makeTxFetcher retrieves a batch of transaction associated with a simulated peer.
func (t *txfetcherTester) makeTxFetcher(peer string, txs []*types.Transaction) func(hashes []common.Hash) {
closure := make(map[common.Hash]*types.Transaction)
for _, tx := range txs {
closure[tx.Hash()] = tx
}
return func(hashes []common.Hash) {
var txs []*types.Transaction
for _, hash := range hashes {
tx := closure[hash]
if tx == nil {
continue
}
txs = append(txs, tx)
}
// Return on a new thread
go t.fetcher.EnqueueTxs(peer, txs)
}
}
func TestSequentialTxAnnouncements(t *testing.T) {
tester := newTxFetcherTester()
txs := makeTransactions(tester.sender, txAnnounceLimit)
retrieveTxs := tester.makeTxFetcher("peer", txs)
newTxsCh := make(chan struct{})
tester.fetcher.importTxsHook = func(transactions []*types.Transaction) {
newTxsCh <- struct{}{}
}
for _, tx := range txs {
tester.fetcher.Notify("peer", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout), retrieveTxs)
select {
case <-newTxsCh:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
if len(tester.txs) != len(txs) {
t.Fatalf("Imported transaction number mismatch, want %d, got %d", len(txs), len(tester.txs))
}
}
func TestConcurrentAnnouncements(t *testing.T) {
tester := newTxFetcherTester()
txs := makeTransactions(tester.sender, txAnnounceLimit)
txFetcherFn1 := tester.makeTxFetcher("peer1", txs)
txFetcherFn2 := tester.makeTxFetcher("peer2", txs)
var (
count uint32
done = make(chan struct{})
)
tester.fetcher.importTxsHook = func(transactions []*types.Transaction) {
atomic.AddUint32(&count, uint32(len(transactions)))
if atomic.LoadUint32(&count) >= uint32(txAnnounceLimit) {
done <- struct{}{}
}
}
for _, tx := range txs {
tester.fetcher.Notify("peer1", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout), txFetcherFn1)
tester.fetcher.Notify("peer2", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout+time.Millisecond), txFetcherFn2)
tester.fetcher.Notify("peer2", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout-time.Millisecond), txFetcherFn2)
}
select {
case <-done:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
func TestBatchAnnouncements(t *testing.T) {
tester := newTxFetcherTester()
txs := makeTransactions(tester.sender, txAnnounceLimit)
retrieveTxs := tester.makeTxFetcher("peer", txs)
var count uint32
var done = make(chan struct{})
tester.fetcher.importTxsHook = func(txs []*types.Transaction) {
atomic.AddUint32(&count, uint32(len(txs)))
if atomic.LoadUint32(&count) >= uint32(txAnnounceLimit) {
done <- struct{}{}
}
}
// Send all announces which exceeds the limit.
var hashes []common.Hash
for _, tx := range txs {
hashes = append(hashes, tx.Hash())
}
tester.fetcher.Notify("peer", hashes, time.Now(), retrieveTxs)
select {
case <-done:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
func TestPropagationAfterAnnounce(t *testing.T) {
tester := newTxFetcherTester()
txs := makeTransactions(tester.sender, txAnnounceLimit)
var cleaned = make(chan struct{})
tester.fetcher.cleanupHook = func(hashes []common.Hash) {
cleaned <- struct{}{}
}
retrieveTxs := tester.makeTxFetcher("peer", txs)
for _, tx := range txs {
tester.fetcher.Notify("peer", []common.Hash{tx.Hash()}, time.Now(), retrieveTxs)
tester.fetcher.EnqueueTxs("peer", []*types.Transaction{tx})
// It's ok to read the map directly since no write
// will happen in the same time.
<-cleaned
if len(tester.fetcher.announced) != 0 {
t.Fatalf("Announcement should be cleaned, got %d", len(tester.fetcher.announced))
}
}
}
func TestEnqueueTransactions(t *testing.T) {
tester := newTxFetcherTester()
txs := makeTransactions(tester.sender, txAnnounceLimit)
done := make(chan struct{})
tester.fetcher.importTxsHook = func(transactions []*types.Transaction) {
if len(transactions) == txAnnounceLimit {
done <- struct{}{}
}
}
go tester.fetcher.EnqueueTxs("peer", txs)
select {
case <-done:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
func TestInvalidTxAnnounces(t *testing.T) {
tester := newTxFetcherTester()
var txs []*types.Transaction
txs = append(txs, makeUnsignedTransactions(tester.sender, 1)...)
txs = append(txs, makeTransactions(tester.sender, 1)...)
txFetcherFn := tester.makeTxFetcher("peer", txs)
dropped := make(chan string, 1)
tester.fetcher.dropHook = func(s string) { dropped <- s }
for _, tx := range txs {
tester.fetcher.Notify("peer", []common.Hash{tx.Hash()}, time.Now(), txFetcherFn)
}
select {
case s := <-dropped:
if s != "peer" {
t.Fatalf("invalid dropped peer")
}
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}
func TestRejectUnderpriced(t *testing.T) {
tester := newTxFetcherTester()
tester.priceLimit = big.NewInt(10000)
done := make(chan struct{})
tester.fetcher.importTxsHook = func([]*types.Transaction) { done <- struct{}{} }
reject := make(chan struct{})
tester.fetcher.rejectUnderprice = func(common.Hash) { reject <- struct{}{} }
tx := types.NewTransaction(0, common.Address{0x1, 0x2, 0x3}, big.NewInt(int64(100)), 100, big.NewInt(int64(100)), nil)
tx, _ = types.SignTx(tx, types.NewEIP155Signer(big.NewInt(1)), tester.sender)
txFetcherFn := tester.makeTxFetcher("peer", []*types.Transaction{tx})
// Send the announcement first time
tester.fetcher.Notify("peer", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout), txFetcherFn)
<-done
// Resend the announcement, shouldn't schedule fetching this time
tester.fetcher.Notify("peer", []common.Hash{tx.Hash()}, time.Now().Add(-arriveTimeout), txFetcherFn)
select {
case <-reject:
case <-time.NewTimer(time.Second).C:
t.Fatalf("timeout")
}
}

141
eth/handler.go
View File

@ -77,9 +77,10 @@ type ProtocolManager struct {
blockchain *core.BlockChain
maxPeers int
downloader *downloader.Downloader
fetcher *fetcher.Fetcher
peers *peerSet
downloader *downloader.Downloader
blockFetcher *fetcher.BlockFetcher
txFetcher *fetcher.TxFetcher
peers *peerSet
eventMux *event.TypeMux
txsCh chan core.NewTxsEvent
@ -97,6 +98,9 @@ type ProtocolManager struct {
// wait group is used for graceful shutdowns during downloading
// and processing
wg sync.WaitGroup
// Test fields or hooks
broadcastTxAnnouncesOnly bool // Testing field, disable transaction propagation
}
// NewProtocolManager returns a new Ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
@ -187,7 +191,8 @@ func NewProtocolManager(config *params.ChainConfig, checkpoint *params.TrustedCh
}
return n, err
}
manager.fetcher = fetcher.New(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)
manager.blockFetcher = fetcher.NewBlockFetcher(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)
manager.txFetcher = fetcher.NewTxFetcher(txpool.Has, txpool.AddRemotes, manager.removePeer)
return manager, nil
}
@ -203,7 +208,7 @@ func (pm *ProtocolManager) makeProtocol(version uint) p2p.Protocol {
Version: version,
Length: length,
Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
peer := pm.newPeer(int(version), p, rw)
peer := pm.newPeer(int(version), p, rw, pm.txpool.Get)
select {
case pm.newPeerCh <- peer:
pm.wg.Add(1)
@ -286,8 +291,8 @@ func (pm *ProtocolManager) Stop() {
log.Info("Ethereum protocol stopped")
}
func (pm *ProtocolManager) newPeer(pv int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
return newPeer(pv, p, newMeteredMsgWriter(rw))
func (pm *ProtocolManager) newPeer(pv int, p *p2p.Peer, rw p2p.MsgReadWriter, getPooledTx func(hash common.Hash) *types.Transaction) *peer {
return newPeer(pv, p, newMeteredMsgWriter(rw), getPooledTx)
}
// handle is the callback invoked to manage the life cycle of an eth peer. When
@ -514,7 +519,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
p.Log().Debug("Whitelist block verified", "number", headers[0].Number.Uint64(), "hash", want)
}
// Irrelevant of the fork checks, send the header to the fetcher just in case
headers = pm.fetcher.FilterHeaders(p.id, headers, time.Now())
headers = pm.blockFetcher.FilterHeaders(p.id, headers, time.Now())
}
if len(headers) > 0 || !filter {
err := pm.downloader.DeliverHeaders(p.id, headers)
@ -567,7 +572,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
// Filter out any explicitly requested bodies, deliver the rest to the downloader
filter := len(transactions) > 0 || len(uncles) > 0
if filter {
transactions, uncles = pm.fetcher.FilterBodies(p.id, transactions, uncles, time.Now())
transactions, uncles = pm.blockFetcher.FilterBodies(p.id, transactions, uncles, time.Now())
}
if len(transactions) > 0 || len(uncles) > 0 || !filter {
err := pm.downloader.DeliverBodies(p.id, transactions, uncles)
@ -678,7 +683,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
}
}
for _, block := range unknown {
pm.fetcher.Notify(p.id, block.Hash, block.Number, time.Now(), p.RequestOneHeader, p.RequestBodies)
pm.blockFetcher.Notify(p.id, block.Hash, block.Number, time.Now(), p.RequestOneHeader, p.RequestBodies)
}
case msg.Code == NewBlockMsg:
@ -703,7 +708,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
// Mark the peer as owning the block and schedule it for import
p.MarkBlock(request.Block.Hash())
pm.fetcher.Enqueue(p.id, request.Block)
pm.blockFetcher.Enqueue(p.id, request.Block)
// Assuming the block is importable by the peer, but possibly not yet done so,
// calculate the head hash and TD that the peer truly must have.
@ -724,6 +729,66 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
}
}
case msg.Code == NewPooledTransactionHashesMsg && p.version >= eth65:
// New transaction announcement arrived, make sure we have
// a valid and fresh chain to handle them
if atomic.LoadUint32(&pm.acceptTxs) == 0 {
break
}
var hashes []common.Hash
if err := msg.Decode(&hashes); err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
// Schedule all the unknown hashes for retrieval
var unknown []common.Hash
for _, hash := range hashes {
// Mark the hashes as present at the remote node
p.MarkTransaction(hash)
// Filter duplicated transaction announcement.
// Notably we only dedupliate announcement in txpool, check the rationale
// behind in EIP https://github.com/ethereum/EIPs/pull/2464.
if pm.txpool.Has(hash) {
continue
}
unknown = append(unknown, hash)
}
pm.txFetcher.Notify(p.id, unknown, time.Now(), p.AsyncRequestTxs)
case msg.Code == GetPooledTransactionsMsg && p.version >= eth65:
// Decode the retrieval message
msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
if _, err := msgStream.List(); err != nil {
return err
}
// Gather transactions until the fetch or network limits is reached
var (
hash common.Hash
bytes int
txs []rlp.RawValue
)
for bytes < softResponseLimit {
// 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 transaction, skipping if unknown to us
tx := pm.txpool.Get(hash)
if tx == nil {
continue
}
// If known, encode and queue for response packet
if encoded, err := rlp.EncodeToBytes(tx); err != nil {
log.Error("Failed to encode transaction", "err", err)
} else {
txs = append(txs, encoded)
bytes += len(encoded)
}
}
return p.SendTransactionRLP(txs)
case msg.Code == TxMsg:
// Transactions arrived, make sure we have a valid and fresh chain to handle them
if atomic.LoadUint32(&pm.acceptTxs) == 0 {
@ -741,7 +806,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
}
p.MarkTransaction(tx.Hash())
}
pm.txpool.AddRemotes(txs)
pm.txFetcher.EnqueueTxs(p.id, txs)
default:
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
@ -791,20 +856,48 @@ func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
// BroadcastTxs will propagate a batch of transactions to all peers which are not known to
// already have the given transaction.
func (pm *ProtocolManager) BroadcastTxs(txs types.Transactions) {
var txset = make(map[*peer]types.Transactions)
func (pm *ProtocolManager) BroadcastTxs(txs types.Transactions, propagate bool) {
var (
txset = make(map[*peer][]common.Hash)
annos = make(map[*peer][]common.Hash)
)
// Broadcast transactions to a batch of peers not knowing about it
if propagate {
for _, tx := range txs {
peers := pm.peers.PeersWithoutTx(tx.Hash())
// Send the block to a subset of our peers
transferLen := int(math.Sqrt(float64(len(peers))))
if transferLen < minBroadcastPeers {
transferLen = minBroadcastPeers
}
if transferLen > len(peers) {
transferLen = len(peers)
}
transfer := peers[:transferLen]
for _, peer := range transfer {
txset[peer] = append(txset[peer], tx.Hash())
}
log.Trace("Broadcast transaction", "hash", tx.Hash(), "recipients", len(peers))
}
for peer, hashes := range txset {
peer.AsyncSendTransactions(hashes)
}
return
}
// Otherwise only broadcast the announcement to peers
for _, tx := range txs {
peers := pm.peers.PeersWithoutTx(tx.Hash())
for _, peer := range peers {
txset[peer] = append(txset[peer], tx)
annos[peer] = append(annos[peer], tx.Hash())
}
log.Trace("Broadcast transaction", "hash", tx.Hash(), "recipients", len(peers))
}
// FIXME include this again: peers = peers[:int(math.Sqrt(float64(len(peers))))]
for peer, txs := range txset {
peer.AsyncSendTransactions(txs)
for peer, hashes := range annos {
if peer.version >= eth65 {
peer.AsyncSendTransactionHashes(hashes)
} else {
peer.AsyncSendTransactions(hashes)
}
}
}
@ -823,7 +916,13 @@ func (pm *ProtocolManager) txBroadcastLoop() {
for {
select {
case event := <-pm.txsCh:
pm.BroadcastTxs(event.Txs)
// For testing purpose only, disable propagation
if pm.broadcastTxAnnouncesOnly {
pm.BroadcastTxs(event.Txs, false)
continue
}
pm.BroadcastTxs(event.Txs, true) // First propagate transactions to peers
pm.BroadcastTxs(event.Txs, false) // Only then announce to the rest
// Err() channel will be closed when unsubscribing.
case <-pm.txsSub.Err():

4
eth/handler_test.go
View File

@ -495,7 +495,7 @@ func testCheckpointChallenge(t *testing.T, syncmode downloader.SyncMode, checkpo
if err != nil {
t.Fatalf("failed to create new blockchain: %v", err)
}
pm, err := NewProtocolManager(config, cht, syncmode, DefaultConfig.NetworkId, new(event.TypeMux), new(testTxPool), ethash.NewFaker(), blockchain, db, 1, nil)
pm, err := NewProtocolManager(config, cht, syncmode, DefaultConfig.NetworkId, new(event.TypeMux), &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, ethash.NewFaker(), blockchain, db, 1, nil)
if err != nil {
t.Fatalf("failed to start test protocol manager: %v", err)
}
@ -582,7 +582,7 @@ func testBroadcastBlock(t *testing.T, totalPeers, broadcastExpected int) {
if err != nil {
t.Fatalf("failed to create new blockchain: %v", err)
}
pm, err := NewProtocolManager(config, nil, downloader.FullSync, DefaultConfig.NetworkId, evmux, new(testTxPool), pow, blockchain, db, 1, nil)
pm, err := NewProtocolManager(config, nil, downloader.FullSync, DefaultConfig.NetworkId, evmux, &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, pow, blockchain, db, 1, nil)
if err != nil {
t.Fatalf("failed to start test protocol manager: %v", err)
}

33
eth/helper_test.go
View File

@ -68,7 +68,7 @@ func newTestProtocolManager(mode downloader.SyncMode, blocks int, generator func
if _, err := blockchain.InsertChain(chain); err != nil {
panic(err)
}
pm, err := NewProtocolManager(gspec.Config, nil, mode, DefaultConfig.NetworkId, evmux, &testTxPool{added: newtx}, engine, blockchain, db, 1, nil)
pm, err := NewProtocolManager(gspec.Config, nil, mode, DefaultConfig.NetworkId, evmux, &testTxPool{added: newtx, pool: make(map[common.Hash]*types.Transaction)}, engine, blockchain, db, 1, nil)
if err != nil {
return nil, nil, err
}
@ -91,22 +91,43 @@ func newTestProtocolManagerMust(t *testing.T, mode downloader.SyncMode, blocks i
// testTxPool is a fake, helper transaction pool for testing purposes
type testTxPool struct {
txFeed event.Feed
pool []*types.Transaction // Collection of all transactions
added chan<- []*types.Transaction // Notification channel for new transactions
pool map[common.Hash]*types.Transaction // Hash map of collected transactions
added chan<- []*types.Transaction // Notification channel for new transactions
lock sync.RWMutex // Protects the transaction pool
}
// Has returns an indicator whether txpool has a transaction
// cached with the given hash.
func (p *testTxPool) Has(hash common.Hash) bool {
p.lock.Lock()
defer p.lock.Unlock()
return p.pool[hash] != nil
}
// Get retrieves the transaction from local txpool with given
// tx hash.
func (p *testTxPool) Get(hash common.Hash) *types.Transaction {
p.lock.Lock()
defer p.lock.Unlock()
return p.pool[hash]
}
// AddRemotes appends a batch of transactions to the pool, and notifies any
// listeners if the addition channel is non nil
func (p *testTxPool) AddRemotes(txs []*types.Transaction) []error {
p.lock.Lock()
defer p.lock.Unlock()
p.pool = append(p.pool, txs...)
for _, tx := range txs {
p.pool[tx.Hash()] = tx
}
if p.added != nil {
p.added <- txs
}
p.txFeed.Send(core.NewTxsEvent{Txs: txs})
return make([]error, len(txs))
}
@ -153,7 +174,7 @@ func newTestPeer(name string, version int, pm *ProtocolManager, shake bool) (*te
var id enode.ID
rand.Read(id[:])
peer := pm.newPeer(version, p2p.NewPeer(id, name, nil), net)
peer := pm.newPeer(version, p2p.NewPeer(id, name, nil), net, pm.txpool.Get)
// Start the peer on a new thread
errc := make(chan error, 1)
@ -191,7 +212,7 @@ func (p *testPeer) handshake(t *testing.T, td *big.Int, head common.Hash, genesi
CurrentBlock: head,
GenesisBlock: genesis,
}
case p.version == eth64:
case p.version >= eth64:
msg = &statusData{
ProtocolVersion: uint32(p.version),
NetworkID: DefaultConfig.NetworkId,

363
eth/peer.go
View File

@ -27,6 +27,7 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/forkid"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/eth/fetcher"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
)
@ -41,24 +42,39 @@ const (
maxKnownTxs = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
maxKnownBlocks = 1024 // Maximum block hashes to keep in the known list (prevent DOS)
// maxQueuedTxs is the maximum number of transaction lists to queue up before
// dropping broadcasts. This is a sensitive number as a transaction list might
// contain a single transaction, or thousands.
maxQueuedTxs = 128
// maxQueuedTxs is the maximum number of transactions to queue up before dropping
// broadcasts.
maxQueuedTxs = 4096
// maxQueuedProps is the maximum number of block propagations to queue up before
// maxQueuedTxAnns is the maximum number of transaction announcements to queue up
// before dropping broadcasts.
maxQueuedTxAnns = 4096
// maxQueuedTxRetrieval is the maximum number of tx retrieval requests to queue up
// before dropping requests.
maxQueuedTxRetrieval = 4096
// maxQueuedBlocks is the maximum number of block propagations to queue up before
// dropping broadcasts. There's not much point in queueing stale blocks, so a few
// that might cover uncles should be enough.
maxQueuedProps = 4
maxQueuedBlocks = 4
// maxQueuedAnns is the maximum number of block announcements to queue up before
// maxQueuedBlockAnns is the maximum number of block announcements to queue up before
// dropping broadcasts. Similarly to block propagations, there's no point to queue
// above some healthy uncle limit, so use that.
maxQueuedAnns = 4
maxQueuedBlockAnns = 4
handshakeTimeout = 5 * time.Second
)
// max is a helper function which returns the larger of the two given integers.
func max(a, b int) int {
if a > b {
return a
}
return b
}
// PeerInfo represents a short summary of the Ethereum sub-protocol metadata known
// about a connected peer.
type PeerInfo struct {
@ -86,48 +102,48 @@ type peer struct {
td *big.Int
lock sync.RWMutex
knownTxs mapset.Set // Set of transaction hashes known to be known by this peer
knownBlocks mapset.Set // Set of block hashes known to be known by this peer
queuedTxs chan []*types.Transaction // Queue of transactions to broadcast to the peer
queuedProps chan *propEvent // Queue of blocks to broadcast to the peer
queuedAnns chan *types.Block // Queue of blocks to announce to the peer
term chan struct{} // Termination channel to stop the broadcaster
knownTxs mapset.Set // Set of transaction hashes known to be known by this peer
knownBlocks mapset.Set // Set of block hashes known to be known by this peer
queuedBlocks chan *propEvent // Queue of blocks to broadcast to the peer
queuedBlockAnns chan *types.Block // Queue of blocks to announce to the peer
txPropagation chan []common.Hash // Channel used to queue transaction propagation requests
txAnnounce chan []common.Hash // Channel used to queue transaction announcement requests
txRetrieval chan []common.Hash // Channel used to queue transaction retrieval requests
getPooledTx func(common.Hash) *types.Transaction // Callback used to retrieve transaction from txpool
term chan struct{} // Termination channel to stop the broadcaster
}
func newPeer(version int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
func newPeer(version int, p *p2p.Peer, rw p2p.MsgReadWriter, getPooledTx func(hash common.Hash) *types.Transaction) *peer {
return &peer{
Peer: p,
rw: rw,
version: version,
id: fmt.Sprintf("%x", p.ID().Bytes()[:8]),
knownTxs: mapset.NewSet(),
knownBlocks: mapset.NewSet(),
queuedTxs: make(chan []*types.Transaction, maxQueuedTxs),
queuedProps: make(chan *propEvent, maxQueuedProps),
queuedAnns: make(chan *types.Block, maxQueuedAnns),
term: make(chan struct{}),
Peer: p,
rw: rw,
version: version,
id: fmt.Sprintf("%x", p.ID().Bytes()[:8]),
knownTxs: mapset.NewSet(),
knownBlocks: mapset.NewSet(),
queuedBlocks: make(chan *propEvent, maxQueuedBlocks),
queuedBlockAnns: make(chan *types.Block, maxQueuedBlockAnns),
txPropagation: make(chan []common.Hash),
txAnnounce: make(chan []common.Hash),
txRetrieval: make(chan []common.Hash),
getPooledTx: getPooledTx,
term: make(chan struct{}),
}
}
// broadcast is a write loop that multiplexes block propagations, announcements
// and transaction broadcasts into the remote peer. The goal is to have an async
// writer that does not lock up node internals.
func (p *peer) broadcast() {
// broadcastBlocks is a write loop that multiplexes block propagations,
// announcements into the remote peer. The goal is to have an async writer
// that does not lock up node internals.
func (p *peer) broadcastBlocks() {
for {
select {
case txs := <-p.queuedTxs:
if err := p.SendTransactions(txs); err != nil {
return
}
p.Log().Trace("Broadcast transactions", "count", len(txs))
case prop := <-p.queuedProps:
case prop := <-p.queuedBlocks:
if err := p.SendNewBlock(prop.block, prop.td); err != nil {
return
}
p.Log().Trace("Propagated block", "number", prop.block.Number(), "hash", prop.block.Hash(), "td", prop.td)
case block := <-p.queuedAnns:
case block := <-p.queuedBlockAnns:
if err := p.SendNewBlockHashes([]common.Hash{block.Hash()}, []uint64{block.NumberU64()}); err != nil {
return
}
@ -139,6 +155,175 @@ func (p *peer) broadcast() {
}
}
// broadcastTxs is a write loop that multiplexes transaction propagations,
// announcements into the remote peer. The goal is to have an async writer
// that does not lock up node internals.
func (p *peer) broadcastTxs() {
var (
txProps []common.Hash // Queue of transaction propagations to the peer
txAnnos []common.Hash // Queue of transaction announcements to the peer
done chan struct{} // Non-nil if background network sender routine is active.
errch = make(chan error) // Channel used to receive network error
)
scheduleTask := func() {
// Short circuit if there already has a inflight task.
if done != nil {
return
}
// Spin up transaction propagation task if there is any
// queued hashes.
if len(txProps) > 0 {
var (
hashes []common.Hash
txs []*types.Transaction
size common.StorageSize
)
for i := 0; i < len(txProps) && size < txsyncPackSize; i++ {
if tx := p.getPooledTx(txProps[i]); tx != nil {
txs = append(txs, tx)
size += tx.Size()
}
hashes = append(hashes, txProps[i])
}
txProps = txProps[:copy(txProps, txProps[len(hashes):])]
if len(txs) > 0 {
done = make(chan struct{})
go func() {
if err := p.SendNewTransactions(txs); err != nil {
errch <- err
return
}
close(done)
p.Log().Trace("Sent transactions", "count", len(txs))
}()
return
}
}
// Spin up transaction announcement task if there is any
// queued hashes.
if len(txAnnos) > 0 {
var (
hashes []common.Hash
pending []common.Hash
size common.StorageSize
)
for i := 0; i < len(txAnnos) && size < txsyncPackSize; i++ {
if tx := p.getPooledTx(txAnnos[i]); tx != nil {
pending = append(pending, txAnnos[i])
size += common.HashLength
}
hashes = append(hashes, txAnnos[i])
}
txAnnos = txAnnos[:copy(txAnnos, txAnnos[len(hashes):])]
if len(pending) > 0 {
done = make(chan struct{})
go func() {
if err := p.SendNewTransactionHashes(pending); err != nil {
errch <- err
return
}
close(done)
p.Log().Trace("Sent transaction announcements", "count", len(pending))
}()
}
}
}
for {
scheduleTask()
select {
case hashes := <-p.txPropagation:
if len(txProps) == maxQueuedTxs {
continue
}
if len(txProps)+len(hashes) > maxQueuedTxs {
hashes = hashes[:maxQueuedTxs-len(txProps)]
}
txProps = append(txProps, hashes...)
case hashes := <-p.txAnnounce:
if len(txAnnos) == maxQueuedTxAnns {
continue
}
if len(txAnnos)+len(hashes) > maxQueuedTxAnns {
hashes = hashes[:maxQueuedTxAnns-len(txAnnos)]
}
txAnnos = append(txAnnos, hashes...)
case <-done:
done = nil
case <-errch:
return
case <-p.term:
return
}
}
}
// retrievalTxs is a write loop which is responsible for retrieving transaction
// from the remote peer. The goal is to have an async writer that does not lock
// up node internals. If there are too many requests queued, then new arrival
// requests will be dropped silently so that we can ensure the memory assumption
// is fixed for each peer.
func (p *peer) retrievalTxs() {
var (
requests []common.Hash // Queue of transaction requests to the peer
done chan struct{} // Non-nil if background network sender routine is active.
errch = make(chan error) // Channel used to receive network error
)
// pick chooses a reasonble number of transaction hashes for retrieval.
pick := func() []common.Hash {
var ret []common.Hash
if len(requests) > fetcher.MaxTransactionFetch {
ret = requests[:fetcher.MaxTransactionFetch]
} else {
ret = requests[:]
}
requests = requests[:copy(requests, requests[len(ret):])]
return ret
}
// send sends transactions retrieval request.
send := func(hashes []common.Hash, done chan struct{}) {
if err := p.RequestTxs(hashes); err != nil {
errch <- err
return
}
close(done)
p.Log().Trace("Sent transaction retrieval request", "count", len(hashes))
}
for {
select {
case hashes := <-p.txRetrieval:
if len(requests) == maxQueuedTxRetrieval {
continue
}
if len(requests)+len(hashes) > maxQueuedTxRetrieval {
hashes = hashes[:maxQueuedTxRetrieval-len(requests)]
}
requests = append(requests, hashes...)
if done == nil {
done = make(chan struct{})
go send(pick(), done)
}
case <-done:
done = nil
if pending := pick(); len(pending) > 0 {
done = make(chan struct{})
go send(pending, done)
}
case <- errch:
return
case <-p.term:
return
}
}
}
// close signals the broadcast goroutine to terminate.
func (p *peer) close() {
close(p.term)
@ -194,33 +379,67 @@ func (p *peer) MarkTransaction(hash common.Hash) {
p.knownTxs.Add(hash)
}
// SendTransactions sends transactions to the peer and includes the hashes
// in its transaction hash set for future reference.
func (p *peer) SendTransactions(txs types.Transactions) error {
// SendNewTransactionHashes sends a batch of transaction hashes to the peer and
// includes the hashes in its transaction hash set for future reference.
func (p *peer) SendNewTransactionHashes(hashes []common.Hash) error {
// Mark all the transactions as known, but ensure we don't overflow our limits
for p.knownTxs.Cardinality() > max(0, maxKnownTxs-len(hashes)) {
p.knownTxs.Pop()
}
for _, hash := range hashes {
p.knownTxs.Add(hash)
}
return p2p.Send(p.rw, NewPooledTransactionHashesMsg, hashes)
}
// SendNewTransactions sends transactions to the peer and includes the hashes
// in its transaction hash set for future reference.
func (p *peer) SendNewTransactions(txs types.Transactions) error {
// Mark all the transactions as known, but ensure we don't overflow our limits
for p.knownTxs.Cardinality() > max(0, maxKnownTxs-len(txs)) {
p.knownTxs.Pop()
}
for _, tx := range txs {
p.knownTxs.Add(tx.Hash())
}
for p.knownTxs.Cardinality() >= maxKnownTxs {
p.knownTxs.Pop()
}
return p2p.Send(p.rw, TxMsg, txs)
}
func (p *peer) SendTransactionRLP(txs []rlp.RawValue) error {
return p2p.Send(p.rw, TxMsg, txs)
}
// AsyncSendTransactions queues list of transactions propagation to a remote
// peer. If the peer's broadcast queue is full, the event is silently dropped.
func (p *peer) AsyncSendTransactions(txs []*types.Transaction) {
func (p *peer) AsyncSendTransactions(hashes []common.Hash) {
select {
case p.queuedTxs <- txs:
case p.txPropagation <- hashes:
// Mark all the transactions as known, but ensure we don't overflow our limits
for _, tx := range txs {
p.knownTxs.Add(tx.Hash())
}
for p.knownTxs.Cardinality() >= maxKnownTxs {
for p.knownTxs.Cardinality() > max(0, maxKnownTxs-len(hashes)) {
p.knownTxs.Pop()
}
default:
p.Log().Debug("Dropping transaction propagation", "count", len(txs))
for _, hash := range hashes {
p.knownTxs.Add(hash)
}
case <-p.term:
p.Log().Debug("Dropping transaction propagation", "count", len(hashes))
}
}
// AsyncSendTransactions queues list of transactions propagation to a remote
// peer. If the peer's broadcast queue is full, the event is silently dropped.
func (p *peer) AsyncSendTransactionHashes(hashes []common.Hash) {
select {
case p.txAnnounce <- hashes:
// Mark all the transactions as known, but ensure we don't overflow our limits
for p.knownTxs.Cardinality() > max(0, maxKnownTxs-len(hashes)) {
p.knownTxs.Pop()
}
for _, hash := range hashes {
p.knownTxs.Add(hash)
}
case <-p.term:
p.Log().Debug("Dropping transaction announcement", "count", len(hashes))
}
}
@ -228,12 +447,12 @@ func (p *peer) AsyncSendTransactions(txs []*types.Transaction) {
// a hash notification.
func (p *peer) SendNewBlockHashes(hashes []common.Hash, numbers []uint64) error {
// Mark all the block hashes as known, but ensure we don't overflow our limits
for p.knownBlocks.Cardinality() > max(0, maxKnownBlocks-len(hashes)) {
p.knownBlocks.Pop()
}
for _, hash := range hashes {
p.knownBlocks.Add(hash)
}
for p.knownBlocks.Cardinality() >= maxKnownBlocks {
p.knownBlocks.Pop()
}
request := make(newBlockHashesData, len(hashes))
for i := 0; i < len(hashes); i++ {
request[i].Hash = hashes[i]
@ -247,12 +466,12 @@ func (p *peer) SendNewBlockHashes(hashes []common.Hash, numbers []uint64) error
// dropped.
func (p *peer) AsyncSendNewBlockHash(block *types.Block) {
select {
case p.queuedAnns <- block:
case p.queuedBlockAnns <- block:
// Mark all the block hash as known, but ensure we don't overflow our limits
p.knownBlocks.Add(block.Hash())
for p.knownBlocks.Cardinality() >= maxKnownBlocks {
p.knownBlocks.Pop()
}
p.knownBlocks.Add(block.Hash())
default:
p.Log().Debug("Dropping block announcement", "number", block.NumberU64(), "hash", block.Hash())
}
@ -261,10 +480,10 @@ func (p *peer) AsyncSendNewBlockHash(block *types.Block) {
// SendNewBlock propagates an entire block to a remote peer.
func (p *peer) SendNewBlock(block *types.Block, td *big.Int) error {
// Mark all the block hash as known, but ensure we don't overflow our limits
p.knownBlocks.Add(block.Hash())
for p.knownBlocks.Cardinality() >= maxKnownBlocks {
p.knownBlocks.Pop()
}
p.knownBlocks.Add(block.Hash())
return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, td})
}
@ -272,12 +491,12 @@ func (p *peer) SendNewBlock(block *types.Block, td *big.Int) error {
// the peer's broadcast queue is full, the event is silently dropped.
func (p *peer) AsyncSendNewBlock(block *types.Block, td *big.Int) {
select {
case p.queuedProps <- &propEvent{block: block, td: td}:
case p.queuedBlocks <- &propEvent{block: block, td: td}:
// Mark all the block hash as known, but ensure we don't overflow our limits
p.knownBlocks.Add(block.Hash())
for p.knownBlocks.Cardinality() >= maxKnownBlocks {
p.knownBlocks.Pop()
}
p.knownBlocks.Add(block.Hash())
default:
p.Log().Debug("Dropping block propagation", "number", block.NumberU64(), "hash", block.Hash())
}
@ -352,6 +571,22 @@ func (p *peer) RequestReceipts(hashes []common.Hash) error {
return p2p.Send(p.rw, GetReceiptsMsg, hashes)
}
// RequestTxs fetches a batch of transactions from a remote node.
func (p *peer) RequestTxs(hashes []common.Hash) error {
p.Log().Debug("Fetching batch of transactions", "count", len(hashes))
return p2p.Send(p.rw, GetPooledTransactionsMsg, hashes)
}
// AsyncRequestTxs queues a tx retrieval request to a remote peer. If
// the peer's retrieval queue is full, the event is silently dropped.
func (p *peer) AsyncRequestTxs(hashes []common.Hash) {
select {
case p.txRetrieval <- hashes:
case <-p.term:
p.Log().Debug("Dropping transaction retrieval request", "count", len(hashes))
}
}
// Handshake executes the eth protocol handshake, negotiating version number,
// network IDs, difficulties, head and genesis blocks.
func (p *peer) Handshake(network uint64, td *big.Int, head common.Hash, genesis common.Hash, forkID forkid.ID, forkFilter forkid.Filter) error {
@ -372,7 +607,7 @@ func (p *peer) Handshake(network uint64, td *big.Int, head common.Hash, genesis
CurrentBlock: head,
GenesisBlock: genesis,
})
case p.version == eth64:
case p.version >= eth64:
errc <- p2p.Send(p.rw, StatusMsg, &statusData{
ProtocolVersion: uint32(p.version),
NetworkID: network,
@ -389,7 +624,7 @@ func (p *peer) Handshake(network uint64, td *big.Int, head common.Hash, genesis
switch {
case p.version == eth63:
errc <- p.readStatusLegacy(network, &status63, genesis)
case p.version == eth64:
case p.version >= eth64:
errc <- p.readStatus(network, &status, genesis, forkFilter)
default:
panic(fmt.Sprintf("unsupported eth protocol version: %d", p.version))
@ -410,7 +645,7 @@ func (p *peer) Handshake(network uint64, td *big.Int, head common.Hash, genesis
switch {
case p.version == eth63:
p.td, p.head = status63.TD, status63.CurrentBlock
case p.version == eth64:
case p.version >= eth64:
p.td, p.head = status.TD, status.Head
default:
panic(fmt.Sprintf("unsupported eth protocol version: %d", p.version))
@ -511,7 +746,9 @@ func (ps *peerSet) Register(p *peer) error {
return errAlreadyRegistered
}
ps.peers[p.id] = p
go p.broadcast()
go p.broadcastBlocks()
go p.broadcastTxs()
go p.retrievalTxs()
return nil
}

20
eth/protocol.go
View File

@ -33,16 +33,17 @@ import (
const (
eth63 = 63
eth64 = 64
eth65 = 65
)
// protocolName is the official short name of the protocol used during capability negotiation.
const protocolName = "eth"
// ProtocolVersions are the supported versions of the eth protocol (first is primary).
var ProtocolVersions = []uint{eth64, eth63}
var ProtocolVersions = []uint{eth65, eth64, eth63}
// protocolLengths are the number of implemented message corresponding to different protocol versions.
var protocolLengths = map[uint]uint64{eth64: 17, eth63: 17}
var protocolLengths = map[uint]uint64{eth65: 17, eth64: 17, eth63: 17}
const protocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a protocol message
@ -60,6 +61,13 @@ const (
NodeDataMsg = 0x0e
GetReceiptsMsg = 0x0f
ReceiptsMsg = 0x10
// New protocol message codes introduced in eth65
//
// Previously these message ids(0x08, 0x09) were used by some
// legacy and unsupported eth protocols, reown them here.
NewPooledTransactionHashesMsg = 0x08
GetPooledTransactionsMsg = 0x09
)
type errCode int
@ -94,6 +102,14 @@ var errorToString = map[int]string{
}
type txPool interface {
// Has returns an indicator whether txpool has a transaction
// cached with the given hash.
Has(hash common.Hash) bool
// Get retrieves the transaction from local txpool with given
// tx hash.
Get(hash common.Hash) *types.Transaction
// AddRemotes should add the given transactions to the pool.
AddRemotes([]*types.Transaction) []error

114
eth/protocol_test.go
View File

@ -20,6 +20,7 @@ import (
"fmt"
"math/big"
"sync"
"sync/atomic"
"testing"
"time"
@ -180,16 +181,16 @@ func TestForkIDSplit(t *testing.T) {
blocksNoFork, _ = core.GenerateChain(configNoFork, genesisNoFork, engine, dbNoFork, 2, nil)
blocksProFork, _ = core.GenerateChain(configProFork, genesisProFork, engine, dbProFork, 2, nil)
ethNoFork, _ = NewProtocolManager(configNoFork, nil, downloader.FullSync, 1, new(event.TypeMux), new(testTxPool), engine, chainNoFork, dbNoFork, 1, nil)
ethProFork, _ = NewProtocolManager(configProFork, nil, downloader.FullSync, 1, new(event.TypeMux), new(testTxPool), engine, chainProFork, dbProFork, 1, nil)
ethNoFork, _ = NewProtocolManager(configNoFork, nil, downloader.FullSync, 1, new(event.TypeMux), &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, engine, chainNoFork, dbNoFork, 1, nil)
ethProFork, _ = NewProtocolManager(configProFork, nil, downloader.FullSync, 1, new(event.TypeMux), &testTxPool{pool: make(map[common.Hash]*types.Transaction)}, engine, chainProFork, dbProFork, 1, nil)
)
ethNoFork.Start(1000)
ethProFork.Start(1000)
// Both nodes should allow the other to connect (same genesis, next fork is the same)
p2pNoFork, p2pProFork := p2p.MsgPipe()
peerNoFork := newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork)
peerProFork := newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork)
peerNoFork := newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork, nil)
peerProFork := newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork, nil)
errc := make(chan error, 2)
go func() { errc <- ethNoFork.handle(peerProFork) }()
@ -207,8 +208,8 @@ func TestForkIDSplit(t *testing.T) {
chainProFork.InsertChain(blocksProFork[:1])
p2pNoFork, p2pProFork = p2p.MsgPipe()
peerNoFork = newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork)
peerProFork = newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork)
peerNoFork = newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork, nil)
peerProFork = newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork, nil)
errc = make(chan error, 2)
go func() { errc <- ethNoFork.handle(peerProFork) }()
@ -226,8 +227,8 @@ func TestForkIDSplit(t *testing.T) {
chainProFork.InsertChain(blocksProFork[1:2])
p2pNoFork, p2pProFork = p2p.MsgPipe()
peerNoFork = newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork)
peerProFork = newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork)
peerNoFork = newPeer(64, p2p.NewPeer(enode.ID{1}, "", nil), p2pNoFork, nil)
peerProFork = newPeer(64, p2p.NewPeer(enode.ID{2}, "", nil), p2pProFork, nil)
errc = make(chan error, 2)
go func() { errc <- ethNoFork.handle(peerProFork) }()
@ -246,6 +247,7 @@ func TestForkIDSplit(t *testing.T) {
// This test checks that received transactions are added to the local pool.
func TestRecvTransactions63(t *testing.T) { testRecvTransactions(t, 63) }
func TestRecvTransactions64(t *testing.T) { testRecvTransactions(t, 64) }
func TestRecvTransactions65(t *testing.T) { testRecvTransactions(t, 65) }
func testRecvTransactions(t *testing.T, protocol int) {
txAdded := make(chan []*types.Transaction)
@ -274,6 +276,7 @@ func testRecvTransactions(t *testing.T, protocol int) {
// This test checks that pending transactions are sent.
func TestSendTransactions63(t *testing.T) { testSendTransactions(t, 63) }
func TestSendTransactions64(t *testing.T) { testSendTransactions(t, 64) }
func TestSendTransactions65(t *testing.T) { testSendTransactions(t, 65) }
func testSendTransactions(t *testing.T, protocol int) {
pm, _ := newTestProtocolManagerMust(t, downloader.FullSync, 0, nil, nil)
@ -298,17 +301,43 @@ func testSendTransactions(t *testing.T, protocol int) {
}
for n := 0; n < len(alltxs) && !t.Failed(); {
var txs []*types.Transaction
msg, err := p.app.ReadMsg()
if err != nil {
t.Errorf("%v: read error: %v", p.Peer, err)
} else if msg.Code != TxMsg {
t.Errorf("%v: got code %d, want TxMsg", p.Peer, msg.Code)
var hashes []common.Hash
var forAllHashes func(callback func(hash common.Hash))
switch protocol {
case 63:
fallthrough
case 64:
msg, err := p.app.ReadMsg()
if err != nil {
t.Errorf("%v: read error: %v", p.Peer, err)
} else if msg.Code != TxMsg {
t.Errorf("%v: got code %d, want TxMsg", p.Peer, msg.Code)
}
if err := msg.Decode(&txs); err != nil {
t.Errorf("%v: %v", p.Peer, err)
}
forAllHashes = func(callback func(hash common.Hash)) {
for _, tx := range txs {
callback(tx.Hash())
}
}
case 65:
msg, err := p.app.ReadMsg()
if err != nil {
t.Errorf("%v: read error: %v", p.Peer, err)
} else if msg.Code != NewPooledTransactionHashesMsg {
t.Errorf("%v: got code %d, want TxMsg", p.Peer, msg.Code)
}
if err := msg.Decode(&hashes); err != nil {
t.Errorf("%v: %v", p.Peer, err)
}
forAllHashes = func(callback func(hash common.Hash)) {
for _, h := range hashes {
callback(h)
}
}
}
if err := msg.Decode(&txs); err != nil {
t.Errorf("%v: %v", p.Peer, err)
}
for _, tx := range txs {
hash := tx.Hash()
forAllHashes(func(hash common.Hash) {
seentx, want := seen[hash]
if seentx {
t.Errorf("%v: got tx more than once: %x", p.Peer, hash)
@ -318,7 +347,7 @@ func testSendTransactions(t *testing.T, protocol int) {
}
seen[hash] = true
n++
}
})
}
}
for i := 0; i < 3; i++ {
@ -329,6 +358,53 @@ func testSendTransactions(t *testing.T, protocol int) {
wg.Wait()
}
func TestTransactionPropagation(t *testing.T) { testSyncTransaction(t, true) }
func TestTransactionAnnouncement(t *testing.T) { testSyncTransaction(t, false) }
func testSyncTransaction(t *testing.T, propagtion bool) {
// Create a protocol manager for transaction fetcher and sender
pmFetcher, _ := newTestProtocolManagerMust(t, downloader.FastSync, 0, nil, nil)
defer pmFetcher.Stop()
pmSender, _ := newTestProtocolManagerMust(t, downloader.FastSync, 1024, nil, nil)
pmSender.broadcastTxAnnouncesOnly = !propagtion
defer pmSender.Stop()
// Sync up the two peers
io1, io2 := p2p.MsgPipe()
go pmSender.handle(pmSender.newPeer(65, p2p.NewPeer(enode.ID{}, "sender", nil), io2, pmSender.txpool.Get))
go pmFetcher.handle(pmFetcher.newPeer(65, p2p.NewPeer(enode.ID{}, "fetcher", nil), io1, pmFetcher.txpool.Get))
time.Sleep(250 * time.Millisecond)
pmFetcher.synchronise(pmFetcher.peers.BestPeer())
atomic.StoreUint32(&pmFetcher.acceptTxs, 1)
newTxs := make(chan core.NewTxsEvent, 1024)
sub := pmFetcher.txpool.SubscribeNewTxsEvent(newTxs)
defer sub.Unsubscribe()
// Fill the pool with new transactions
alltxs := make([]*types.Transaction, 1024)
for nonce := range alltxs {
alltxs[nonce] = newTestTransaction(testAccount, uint64(nonce), 0)
}
pmSender.txpool.AddRemotes(alltxs)
var got int
loop:
for {
select {
case ev := <-newTxs:
got += len(ev.Txs)
if got == 1024 {
break loop
}
case <-time.NewTimer(time.Second).C:
t.Fatal("Failed to retrieve all transaction")
}
}
}
// Tests that the custom union field encoder and decoder works correctly.
func TestGetBlockHeadersDataEncodeDecode(t *testing.T) {
// Create a "random" hash for testing

59
eth/sync.go
View File

@ -38,8 +38,9 @@ const (
)
type txsync struct {
p *peer
txs []*types.Transaction
p *peer
hashes []common.Hash
txs []*types.Transaction
}
// syncTransactions starts sending all currently pending transactions to the given peer.
@ -53,7 +54,7 @@ func (pm *ProtocolManager) syncTransactions(p *peer) {
return
}
select {
case pm.txsyncCh <- &txsync{p, txs}:
case pm.txsyncCh <- &txsync{p: p, txs: txs}:
case <-pm.quitSync:
}
}
@ -69,26 +70,46 @@ func (pm *ProtocolManager) txsyncLoop() {
pack = new(txsync) // the pack that is being sent
done = make(chan error, 1) // result of the send
)
// send starts a sending a pack of transactions from the sync.
send := func(s *txsync) {
// Fill pack with transactions up to the target size.
size := common.StorageSize(0)
pack.p = s.p
pack.hashes = pack.hashes[:0]
pack.txs = pack.txs[:0]
for i := 0; i < len(s.txs) && size < txsyncPackSize; i++ {
pack.txs = append(pack.txs, s.txs[i])
size += s.txs[i].Size()
if s.p.version >= eth65 {
// Eth65 introduces transaction announcement https://github.com/ethereum/EIPs/pull/2464,
// only txhashes are transferred here.
for i := 0; i < len(s.txs) && size < txsyncPackSize; i++ {
pack.hashes = append(pack.hashes, s.txs[i].Hash())
size += common.HashLength
}
// Remove the transactions that will be sent.
s.txs = s.txs[:copy(s.txs, s.txs[len(pack.hashes):])]
if len(s.txs) == 0 {
delete(pending, s.p.ID())
}
// Send the pack in the background.
s.p.Log().Trace("Sending batch of transaction announcements", "count", len(pack.hashes), "bytes", size)
sending = true
go func() { done <- pack.p.SendNewTransactionHashes(pack.hashes) }()
} else {
// Legacy eth protocol doesn't have transaction announcement protocol
// message, transfer the whole pending transaction slice.
for i := 0; i < len(s.txs) && size < txsyncPackSize; i++ {
pack.txs = append(pack.txs, s.txs[i])
size += s.txs[i].Size()
}
// Remove the transactions that will be sent.
s.txs = s.txs[:copy(s.txs, s.txs[len(pack.txs):])]
if len(s.txs) == 0 {
delete(pending, s.p.ID())
}
// Send the pack in the background.
s.p.Log().Trace("Sending batch of transactions", "count", len(pack.txs), "bytes", size)
sending = true
go func() { done <- pack.p.SendNewTransactions(pack.txs) }()
}
// Remove the transactions that will be sent.
s.txs = s.txs[:copy(s.txs, s.txs[len(pack.txs):])]
if len(s.txs) == 0 {
delete(pending, s.p.ID())
}
// Send the pack in the background.
s.p.Log().Trace("Sending batch of transactions", "count", len(pack.txs), "bytes", size)
sending = true
go func() { done <- pack.p.SendTransactions(pack.txs) }()
}
// pick chooses the next pending sync.
@ -133,8 +154,10 @@ func (pm *ProtocolManager) txsyncLoop() {
// downloading hashes and blocks as well as handling the announcement handler.
func (pm *ProtocolManager) syncer() {
// Start and ensure cleanup of sync mechanisms
pm.fetcher.Start()
defer pm.fetcher.Stop()
pm.blockFetcher.Start()
pm.txFetcher.Start()
defer pm.blockFetcher.Stop()
defer pm.txFetcher.Stop()
defer pm.downloader.Terminate()
// Wait for different events to fire synchronisation operations

10
eth/sync_test.go
View File

@ -26,9 +26,13 @@ import (
"github.com/ethereum/go-ethereum/p2p/enode"
)
func TestFastSyncDisabling63(t *testing.T) { testFastSyncDisabling(t, 63) }
func TestFastSyncDisabling64(t *testing.T) { testFastSyncDisabling(t, 64) }
func TestFastSyncDisabling65(t *testing.T) { testFastSyncDisabling(t, 65) }
// Tests that fast sync gets disabled as soon as a real block is successfully
// imported into the blockchain.
func TestFastSyncDisabling(t *testing.T) {
func testFastSyncDisabling(t *testing.T, protocol int) {
// Create a pristine protocol manager, check that fast sync is left enabled
pmEmpty, _ := newTestProtocolManagerMust(t, downloader.FastSync, 0, nil, nil)
if atomic.LoadUint32(&pmEmpty.fastSync) == 0 {
@ -42,8 +46,8 @@ func TestFastSyncDisabling(t *testing.T) {
// Sync up the two peers
io1, io2 := p2p.MsgPipe()
go pmFull.handle(pmFull.newPeer(63, p2p.NewPeer(enode.ID{}, "empty", nil), io2))
go pmEmpty.handle(pmEmpty.newPeer(63, p2p.NewPeer(enode.ID{}, "full", nil), io1))
go pmFull.handle(pmFull.newPeer(protocol, p2p.NewPeer(enode.ID{}, "empty", nil), io2, pmFull.txpool.Get))
go pmEmpty.handle(pmEmpty.newPeer(protocol, p2p.NewPeer(enode.ID{}, "full", nil), io1, pmEmpty.txpool.Get))
time.Sleep(250 * time.Millisecond)
pmEmpty.synchronise(pmEmpty.peers.BestPeer())