eth: rework tx fetcher to use O(1) ops + manage network requests

core/tx_pool.go

@@ -18,7 +18,6 @@ package core
 
 import (
 	"errors"
-	"fmt"
 	"math"
 	"math/big"
 	"sort"
@@ -53,6 +52,10 @@ const (
 )
 
 var (
+	// ErrAlreadyKnown is returned if the transactions is already contained
+	// within the pool.
+	ErrAlreadyKnown = errors.New("already known")
+
 	// ErrInvalidSender is returned if the transaction contains an invalid signature.
 	ErrInvalidSender = errors.New("invalid sender")
 
@@ -579,7 +582,7 @@ func (pool *TxPool) add(tx *types.Transaction, local bool) (replaced bool, err e
 	if pool.all.Get(hash) != nil {
 		log.Trace("Discarding already known transaction", "hash", hash)
 		knownTxMeter.Mark(1)
-		return false, fmt.Errorf("known transaction: %x", hash)
+		return false, ErrAlreadyKnown
 	}
 	// If the transaction fails basic validation, discard it
 	if err := pool.validateTx(tx, local); err != nil {
@@ -786,7 +789,7 @@ func (pool *TxPool) addTxs(txs []*types.Transaction, local, sync bool) []error {
 	for i, tx := range txs {
 		// If the transaction is known, pre-set the error slot
 		if pool.all.Get(tx.Hash()) != nil {
-			errs[i] = fmt.Errorf("known transaction: %x", tx.Hash())
+			errs[i] = ErrAlreadyKnown
 			knownTxMeter.Mark(1)
 			continue
 		}

eth/fetcher/block_fetcher.go

@@ -27,6 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/metrics"
 )
 
 const (
@@ -42,6 +43,26 @@ const (
 	blockLimit   = 64  // Maximum number of unique blocks a peer may have delivered
 )
 
+var (
+	blockAnnounceInMeter   = metrics.NewRegisteredMeter("eth/fetcher/block/announces/in", nil)
+	blockAnnounceOutTimer  = metrics.NewRegisteredTimer("eth/fetcher/block/announces/out", nil)
+	blockAnnounceDropMeter = metrics.NewRegisteredMeter("eth/fetcher/block/announces/drop", nil)
+	blockAnnounceDOSMeter  = metrics.NewRegisteredMeter("eth/fetcher/block/announces/dos", nil)
+
+	blockBroadcastInMeter   = metrics.NewRegisteredMeter("eth/fetcher/block/broadcasts/in", nil)
+	blockBroadcastOutTimer  = metrics.NewRegisteredTimer("eth/fetcher/block/broadcasts/out", nil)
+	blockBroadcastDropMeter = metrics.NewRegisteredMeter("eth/fetcher/block/broadcasts/drop", nil)
+	blockBroadcastDOSMeter  = metrics.NewRegisteredMeter("eth/fetcher/block/broadcasts/dos", nil)
+
+	headerFetchMeter = metrics.NewRegisteredMeter("eth/fetcher/block/headers", nil)
+	bodyFetchMeter   = metrics.NewRegisteredMeter("eth/fetcher/block/bodies", nil)
+
+	headerFilterInMeter  = metrics.NewRegisteredMeter("eth/fetcher/block/filter/headers/in", nil)
+	headerFilterOutMeter = metrics.NewRegisteredMeter("eth/fetcher/block/filter/headers/out", nil)
+	bodyFilterInMeter    = metrics.NewRegisteredMeter("eth/fetcher/block/filter/bodies/in", nil)
+	bodyFilterOutMeter   = metrics.NewRegisteredMeter("eth/fetcher/block/filter/bodies/out", nil)
+)
+
 var (
 	errTerminated = errors.New("terminated")
 )

eth/fetcher/metrics.go

-// Copyright 2015 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/>.
-
-// Contains the metrics collected by the fetcher.
-
-package fetcher
-
-import (
-	"github.com/ethereum/go-ethereum/metrics"
-)
-
-var (
-	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)
-
-	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)
-
-	headerFilterInMeter  = metrics.NewRegisteredMeter("eth/fetcher/filter/headers/in", nil)
-	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)
-)

eth/handler.go

@@ -51,7 +51,7 @@ const (
 	// The number is referenced from the size of tx pool.
 	txChanSize = 4096
 
-	// minimim number of peers to broadcast new blocks to
+	// minimim number of peers to broadcast entire blocks and transactions too.
 	minBroadcastPeers = 4
 )
 
@@ -192,7 +192,15 @@ func NewProtocolManager(config *params.ChainConfig, checkpoint *params.TrustedCh
 		return n, err
 	}
 	manager.blockFetcher = fetcher.NewBlockFetcher(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)
-	manager.txFetcher = fetcher.NewTxFetcher(txpool.Has, txpool.AddRemotes, manager.removePeer)
+
+	fetchTx := func(peer string, hashes []common.Hash) error {
+		p := manager.peers.Peer(peer)
+		if p == nil {
+			return errors.New("unknown peer")
+		}
+		return p.RequestTxs(hashes)
+	}
+	manager.txFetcher = fetcher.NewTxFetcher(txpool.Has, txpool.AddRemotes, fetchTx)
 
 	return manager, nil
 }
@@ -240,6 +248,8 @@ func (pm *ProtocolManager) removePeer(id string) {
 
 	// Unregister the peer from the downloader and Ethereum peer set
 	pm.downloader.UnregisterPeer(id)
+	pm.txFetcher.Drop(id)
+
 	if err := pm.peers.Unregister(id); err != nil {
 		log.Error("Peer removal failed", "peer", id, "err", err)
 	}
@@ -263,7 +273,7 @@ func (pm *ProtocolManager) Start(maxPeers int) {
 
 	// start sync handlers
 	go pm.syncer()
-	go pm.txsyncLoop()
+	go pm.txsyncLoop64() // TODO(karalabe): Legacy initial tx echange, drop with eth/64.
 }
 
 func (pm *ProtocolManager) Stop() {
@@ -292,7 +302,7 @@ func (pm *ProtocolManager) Stop() {
 }
 
 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)
+	return newPeer(pv, p, rw, getPooledTx)
 }
 
 // handle is the callback invoked to manage the life cycle of an eth peer. When
@@ -316,9 +326,6 @@ func (pm *ProtocolManager) handle(p *peer) error {
 		p.Log().Debug("Ethereum handshake failed", "err", err)
 		return err
 	}
-	if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
-		rw.Init(p.version)
-	}
 	// Register the peer locally
 	if err := pm.peers.Register(p); err != nil {
 		p.Log().Error("Ethereum peer registration failed", "err", err)
@@ -740,20 +747,10 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			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)
+		pm.txFetcher.Notify(p.id, hashes)
 
 	case msg.Code == GetPooledTransactionsMsg && p.version >= eth65:
 		// Decode the retrieval message
@@ -763,9 +760,10 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		}
 		// Gather transactions until the fetch or network limits is reached
 		var (
-			hash  common.Hash
-			bytes int
-			txs   []rlp.RawValue
+			hash   common.Hash
+			bytes  int
+			hashes []common.Hash
+			txs    []rlp.RawValue
 		)
 		for bytes < softResponseLimit {
 			// Retrieve the hash of the next block
@@ -783,13 +781,14 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			if encoded, err := rlp.EncodeToBytes(tx); err != nil {
 				log.Error("Failed to encode transaction", "err", err)
 			} else {
+				hashes = append(hashes, hash)
 				txs = append(txs, encoded)
 				bytes += len(encoded)
 			}
 		}
-		return p.SendTransactionRLP(txs)
+		return p.SendPooledTransactionsRLP(hashes, txs)
 
-	case msg.Code == TxMsg:
+	case msg.Code == TransactionMsg || (msg.Code == PooledTransactionsMsg && p.version >= eth65):
 		// Transactions arrived, make sure we have a valid and fresh chain to handle them
 		if atomic.LoadUint32(&pm.acceptTxs) == 0 {
 			break
@@ -806,7 +805,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 			}
 			p.MarkTransaction(tx.Hash())
 		}
-		pm.txFetcher.EnqueueTxs(p.id, txs)
+		pm.txFetcher.Enqueue(p.id, txs, msg.Code == PooledTransactionsMsg)
 
 	default:
 		return errResp(ErrInvalidMsgCode, "%v", msg.Code)
@@ -854,9 +853,9 @@ func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
 	}
 }
 
-// BroadcastTxs will propagate a batch of transactions to all peers which are not known to
+// BroadcastTransactions 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, propagate bool) {
+func (pm *ProtocolManager) BroadcastTransactions(txs types.Transactions, propagate bool) {
 	var (
 		txset = make(map[*peer][]common.Hash)
 		annos = make(map[*peer][]common.Hash)
@@ -894,7 +893,7 @@ func (pm *ProtocolManager) BroadcastTxs(txs types.Transactions, propagate bool)
 	}
 	for peer, hashes := range annos {
 		if peer.version >= eth65 {
-			peer.AsyncSendTransactionHashes(hashes)
+			peer.AsyncSendPooledTransactionHashes(hashes)
 		} else {
 			peer.AsyncSendTransactions(hashes)
 		}
@@ -918,11 +917,11 @@ func (pm *ProtocolManager) txBroadcastLoop() {
 		case event := <-pm.txsCh:
 			// For testing purpose only, disable propagation
 			if pm.broadcastTxAnnouncesOnly {
-				pm.BroadcastTxs(event.Txs, false)
+				pm.BroadcastTransactions(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
+			pm.BroadcastTransactions(event.Txs, true)  // First propagate transactions to peers
+			pm.BroadcastTransactions(event.Txs, false) // Only then announce to the rest
 
 		// Err() channel will be closed when unsubscribing.
 		case <-pm.txsSub.Err():

eth/metrics.go

-// Copyright 2015 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 eth
-
-import (
-	"github.com/ethereum/go-ethereum/metrics"
-	"github.com/ethereum/go-ethereum/p2p"
-)
-
-var (
-	propTxnInPacketsMeter     = metrics.NewRegisteredMeter("eth/prop/txns/in/packets", nil)
-	propTxnInTrafficMeter     = metrics.NewRegisteredMeter("eth/prop/txns/in/traffic", nil)
-	propTxnOutPacketsMeter    = metrics.NewRegisteredMeter("eth/prop/txns/out/packets", nil)
-	propTxnOutTrafficMeter    = metrics.NewRegisteredMeter("eth/prop/txns/out/traffic", nil)
-	propHashInPacketsMeter    = metrics.NewRegisteredMeter("eth/prop/hashes/in/packets", nil)
-	propHashInTrafficMeter    = metrics.NewRegisteredMeter("eth/prop/hashes/in/traffic", nil)
-	propHashOutPacketsMeter   = metrics.NewRegisteredMeter("eth/prop/hashes/out/packets", nil)
-	propHashOutTrafficMeter   = metrics.NewRegisteredMeter("eth/prop/hashes/out/traffic", nil)
-	propBlockInPacketsMeter   = metrics.NewRegisteredMeter("eth/prop/blocks/in/packets", nil)
-	propBlockInTrafficMeter   = metrics.NewRegisteredMeter("eth/prop/blocks/in/traffic", nil)
-	propBlockOutPacketsMeter  = metrics.NewRegisteredMeter("eth/prop/blocks/out/packets", nil)
-	propBlockOutTrafficMeter  = metrics.NewRegisteredMeter("eth/prop/blocks/out/traffic", nil)
-	reqHeaderInPacketsMeter   = metrics.NewRegisteredMeter("eth/req/headers/in/packets", nil)
-	reqHeaderInTrafficMeter   = metrics.NewRegisteredMeter("eth/req/headers/in/traffic", nil)
-	reqHeaderOutPacketsMeter  = metrics.NewRegisteredMeter("eth/req/headers/out/packets", nil)
-	reqHeaderOutTrafficMeter  = metrics.NewRegisteredMeter("eth/req/headers/out/traffic", nil)
-	reqBodyInPacketsMeter     = metrics.NewRegisteredMeter("eth/req/bodies/in/packets", nil)
-	reqBodyInTrafficMeter     = metrics.NewRegisteredMeter("eth/req/bodies/in/traffic", nil)
-	reqBodyOutPacketsMeter    = metrics.NewRegisteredMeter("eth/req/bodies/out/packets", nil)
-	reqBodyOutTrafficMeter    = metrics.NewRegisteredMeter("eth/req/bodies/out/traffic", nil)
-	reqStateInPacketsMeter    = metrics.NewRegisteredMeter("eth/req/states/in/packets", nil)
-	reqStateInTrafficMeter    = metrics.NewRegisteredMeter("eth/req/states/in/traffic", nil)
-	reqStateOutPacketsMeter   = metrics.NewRegisteredMeter("eth/req/states/out/packets", nil)
-	reqStateOutTrafficMeter   = metrics.NewRegisteredMeter("eth/req/states/out/traffic", nil)
-	reqReceiptInPacketsMeter  = metrics.NewRegisteredMeter("eth/req/receipts/in/packets", nil)
-	reqReceiptInTrafficMeter  = metrics.NewRegisteredMeter("eth/req/receipts/in/traffic", nil)
-	reqReceiptOutPacketsMeter = metrics.NewRegisteredMeter("eth/req/receipts/out/packets", nil)
-	reqReceiptOutTrafficMeter = metrics.NewRegisteredMeter("eth/req/receipts/out/traffic", nil)
-	miscInPacketsMeter        = metrics.NewRegisteredMeter("eth/misc/in/packets", nil)
-	miscInTrafficMeter        = metrics.NewRegisteredMeter("eth/misc/in/traffic", nil)
-	miscOutPacketsMeter       = metrics.NewRegisteredMeter("eth/misc/out/packets", nil)
-	miscOutTrafficMeter       = metrics.NewRegisteredMeter("eth/misc/out/traffic", nil)
-)
-
-// meteredMsgReadWriter is a wrapper around a p2p.MsgReadWriter, capable of
-// accumulating the above defined metrics based on the data stream contents.
-type meteredMsgReadWriter struct {
-	p2p.MsgReadWriter     // Wrapped message stream to meter
-	version           int // Protocol version to select correct meters
-}
-
-// newMeteredMsgWriter wraps a p2p MsgReadWriter with metering support. If the
-// metrics system is disabled, this function returns the original object.
-func newMeteredMsgWriter(rw p2p.MsgReadWriter) p2p.MsgReadWriter {
-	if !metrics.Enabled {
-		return rw
-	}
-	return &meteredMsgReadWriter{MsgReadWriter: rw}
-}
-
-// Init sets the protocol version used by the stream to know which meters to
-// increment in case of overlapping message ids between protocol versions.
-func (rw *meteredMsgReadWriter) Init(version int) {
-	rw.version = version
-}
-
-func (rw *meteredMsgReadWriter) ReadMsg() (p2p.Msg, error) {
-	// Read the message and short circuit in case of an error
-	msg, err := rw.MsgReadWriter.ReadMsg()
-	if err != nil {
-		return msg, err
-	}
-	// Account for the data traffic
-	packets, traffic := miscInPacketsMeter, miscInTrafficMeter
-	switch {
-	case msg.Code == BlockHeadersMsg:
-		packets, traffic = reqHeaderInPacketsMeter, reqHeaderInTrafficMeter
-	case msg.Code == BlockBodiesMsg:
-		packets, traffic = reqBodyInPacketsMeter, reqBodyInTrafficMeter
-
-	case rw.version >= eth63 && msg.Code == NodeDataMsg:
-		packets, traffic = reqStateInPacketsMeter, reqStateInTrafficMeter
-	case rw.version >= eth63 && msg.Code == ReceiptsMsg:
-		packets, traffic = reqReceiptInPacketsMeter, reqReceiptInTrafficMeter
-
-	case msg.Code == NewBlockHashesMsg:
-		packets, traffic = propHashInPacketsMeter, propHashInTrafficMeter
-	case msg.Code == NewBlockMsg:
-		packets, traffic = propBlockInPacketsMeter, propBlockInTrafficMeter
-	case msg.Code == TxMsg:
-		packets, traffic = propTxnInPacketsMeter, propTxnInTrafficMeter
-	}
-	packets.Mark(1)
-	traffic.Mark(int64(msg.Size))
-
-	return msg, err
-}
-
-func (rw *meteredMsgReadWriter) WriteMsg(msg p2p.Msg) error {
-	// Account for the data traffic
-	packets, traffic := miscOutPacketsMeter, miscOutTrafficMeter
-	switch {
-	case msg.Code == BlockHeadersMsg:
-		packets, traffic = reqHeaderOutPacketsMeter, reqHeaderOutTrafficMeter
-	case msg.Code == BlockBodiesMsg:
-		packets, traffic = reqBodyOutPacketsMeter, reqBodyOutTrafficMeter
-
-	case rw.version >= eth63 && msg.Code == NodeDataMsg:
-		packets, traffic = reqStateOutPacketsMeter, reqStateOutTrafficMeter
-	case rw.version >= eth63 && msg.Code == ReceiptsMsg:
-		packets, traffic = reqReceiptOutPacketsMeter, reqReceiptOutTrafficMeter
-
-	case msg.Code == NewBlockHashesMsg:
-		packets, traffic = propHashOutPacketsMeter, propHashOutTrafficMeter
-	case msg.Code == NewBlockMsg:
-		packets, traffic = propBlockOutPacketsMeter, propBlockOutTrafficMeter
-	case msg.Code == TxMsg:
-		packets, traffic = propTxnOutPacketsMeter, propTxnOutTrafficMeter
-	}
-	packets.Mark(1)
-	traffic.Mark(int64(msg.Size))
-
-	// Send the packet to the p2p layer
-	return rw.MsgReadWriter.WriteMsg(msg)
-}

eth/peer.go

@@ -27,7 +27,6 @@ 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"
 )
@@ -43,17 +42,13 @@ const (
 	maxKnownBlocks = 1024  // Maximum block hashes to keep in the known list (prevent DOS)
 
 	// maxQueuedTxs is the maximum number of transactions to queue up before dropping
-	// broadcasts.
+	// older broadcasts.
 	maxQueuedTxs = 4096
 
 	// maxQueuedTxAnns is the maximum number of transaction announcements to queue up
-	// before dropping broadcasts.
+	// before dropping older announcements.
 	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.
@@ -102,15 +97,16 @@ 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
-	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
+	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
+
+	knownTxs    mapset.Set                           // Set of transaction hashes known to be known by this peer
+	txBroadcast chan []common.Hash                   // Channel used to queue transaction propagation requests
+	txAnnounce  chan []common.Hash                   // Channel used to queue transaction announcement 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, getPooledTx func(hash common.Hash) *types.Transaction) *peer {
@@ -123,17 +119,16 @@ func newPeer(version int, p *p2p.Peer, rw p2p.MsgReadWriter, getPooledTx func(ha
 		knownBlocks:     mapset.NewSet(),
 		queuedBlocks:    make(chan *propEvent, maxQueuedBlocks),
 		queuedBlockAnns: make(chan *types.Block, maxQueuedBlockAnns),
-		txPropagation:   make(chan []common.Hash),
+		txBroadcast:     make(chan []common.Hash),
 		txAnnounce:      make(chan []common.Hash),
-		txRetrieval:     make(chan []common.Hash),
 		getPooledTx:     getPooledTx,
 		term:            make(chan struct{}),
 	}
 }
 
-// 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.
+// broadcastBlocks is a write loop that multiplexes blocks and block accouncements
+// to the remote peer. The goal is to have an async writer that does not lock up
+// node internals and at the same time rate limits queued data.
 func (p *peer) broadcastBlocks() {
 	for {
 		select {
@@ -155,71 +150,101 @@ func (p *peer) broadcastBlocks() {
 	}
 }
 
-// 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() {
+// broadcastTransactions is a write loop that schedules transaction broadcasts
+// to the remote peer. The goal is to have an async writer that does not lock up
+// node internals and at the same time rate limits queued data.
+func (p *peer) broadcastTransactions() {
 	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
+		queue []common.Hash      // Queue of hashes to broadcast as full transactions
+		done  chan struct{}      // Non-nil if background broadcaster is running
+		fail  = 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 {
+	for {
+		// If there's no in-flight broadcast running, check if a new one is needed
+		if done == nil && len(queue) > 0 {
+			// Pile transaction until we reach our allowed network limit
 			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 {
+			for i := 0; i < len(queue) && size < txsyncPackSize; i++ {
+				if tx := p.getPooledTx(queue[i]); tx != nil {
 					txs = append(txs, tx)
 					size += tx.Size()
 				}
-				hashes = append(hashes, txProps[i])
+				hashes = append(hashes, queue[i])
 			}
-			txProps = txProps[:copy(txProps, txProps[len(hashes):])]
+			queue = queue[:copy(queue, queue[len(hashes):])]
+
+			// If there's anything available to transfer, fire up an async writer
 			if len(txs) > 0 {
 				done = make(chan struct{})
 				go func() {
-					if err := p.SendNewTransactions(txs); err != nil {
-						errch <- err
+					if err := p.sendTransactions(txs); err != nil {
+						fail <- 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 {
+		// Transfer goroutine may or may not have been started, listen for events
+		select {
+		case hashes := <-p.txBroadcast:
+			// New batch of transactions to be broadcast, queue them (with cap)
+			queue = append(queue, hashes...)
+			if len(queue) > maxQueuedTxs {
+				// Fancy copy and resize to ensure buffer doesn't grow indefinitely
+				queue = queue[:copy(queue, queue[len(queue)-maxQueuedTxs:])]
+			}
+
+		case <-done:
+			done = nil
+
+		case <-fail:
+			return
+
+		case <-p.term:
+			return
+		}
+	}
+}
+
+// announceTransactions is a write loop that schedules transaction broadcasts
+// to the remote peer. The goal is to have an async writer that does not lock up
+// node internals and at the same time rate limits queued data.
+func (p *peer) announceTransactions() {
+	var (
+		queue []common.Hash      // Queue of hashes to announce as transaction stubs
+		done  chan struct{}      // Non-nil if background announcer is running
+		fail  = make(chan error) // Channel used to receive network error
+	)
+	for {
+		// If there's no in-flight announce running, check if a new one is needed
+		if done == nil && len(queue) > 0 {
+			// Pile transaction hashes until we reach our allowed network limit
 			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])
+			for i := 0; i < len(queue) && size < txsyncPackSize; i++ {
+				if p.getPooledTx(queue[i]) != nil {
+					pending = append(pending, queue[i])
 					size += common.HashLength
 				}
-				hashes = append(hashes, txAnnos[i])
+				hashes = append(hashes, queue[i])
 			}
-			txAnnos = txAnnos[:copy(txAnnos, txAnnos[len(hashes):])]
+			queue = queue[:copy(queue, queue[len(hashes):])]
+
+			// If there's anything available to transfer, fire up an async writer
 			if len(pending) > 0 {
 				done = make(chan struct{})
 				go func() {
-					if err := p.SendNewTransactionHashes(pending); err != nil {
-						errch <- err
+					if err := p.sendPooledTransactionHashes(pending); err != nil {
+						fail <- err
 						return
 					}
 					close(done)
@@ -227,95 +252,20 @@ func (p *peer) broadcastTxs() {
 				}()
 			}
 		}
-	}
-
-	for {
-		scheduleTask()
+		// Transfer goroutine may or may not have been started, listen for events
 		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)
+			// New batch of transactions to be broadcast, queue them (with cap)
+			queue = append(queue, hashes...)
+			if len(queue) > maxQueuedTxAnns {
+				// Fancy copy and resize to ensure buffer doesn't grow indefinitely
+				queue = queue[:copy(queue, queue[len(queue)-maxQueuedTxs:])]
 			}
 
 		case <-done:
 			done = nil
-			if pending := pick(); len(pending) > 0 {
-				done = make(chan struct{})
-				go send(pending, done)
-			}
 
-		case <- errch:
+		case <-fail:
 			return
 
 		case <-p.term:
@@ -379,22 +329,22 @@ func (p *peer) MarkTransaction(hash common.Hash) {
 	p.knownTxs.Add(hash)
 }
 
-// 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)
+// SendTransactions64 sends transactions to the peer and includes the hashes
+// in its transaction hash set for future reference.
+//
+// This method is legacy support for initial transaction exchange in eth/64 and
+// prior. For eth/65 and higher use SendPooledTransactionHashes.
+func (p *peer) SendTransactions64(txs types.Transactions) error {
+	return p.sendTransactions(txs)
 }
 
-// SendNewTransactions sends transactions to the peer and includes the hashes
+// sendTransactions 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 {
+//
+// This method is a helper used by the async transaction sender. Don't call it
+// directly as the queueing (memory) and transmission (bandwidth) costs should
+// not be managed directly.
+func (p *peer) sendTransactions(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()
@@ -402,18 +352,15 @@ func (p *peer) SendNewTransactions(txs types.Transactions) error {
 	for _, tx := range txs {
 		p.knownTxs.Add(tx.Hash())
 	}
-	return p2p.Send(p.rw, TxMsg, txs)
-}
-
-func (p *peer) SendTransactionRLP(txs []rlp.RawValue) error {
-	return p2p.Send(p.rw, TxMsg, txs)
+	return p2p.Send(p.rw, TransactionMsg, txs)
 }
 
-// AsyncSendTransactions queues list of transactions propagation to a remote
-// peer. If the peer's broadcast queue is full, the event is silently dropped.
+// AsyncSendTransactions queues a list of transactions (by hash) to eventually
+// propagate to a remote peer. The number of pending sends are capped (new ones
+// will force old sends to be dropped)
 func (p *peer) AsyncSendTransactions(hashes []common.Hash) {
 	select {
-	case p.txPropagation <- hashes:
+	case p.txBroadcast <- 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()
@@ -426,9 +373,27 @@ func (p *peer) AsyncSendTransactions(hashes []common.Hash) {
 	}
 }
 
-// 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) {
+// sendPooledTransactionHashes sends transaction hashes to the peer and includes
+// them in its transaction hash set for future reference.
+//
+// This method is a helper used by the async transaction announcer. Don't call it
+// directly as the queueing (memory) and transmission (bandwidth) costs should
+// not be managed directly.
+func (p *peer) sendPooledTransactionHashes(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)
+}
+
+// AsyncSendPooledTransactionHashes queues a list of transactions hashes to eventually
+// announce to a remote peer.  The number of pending sends are capped (new ones
+// will force old sends to be dropped)
+func (p *peer) AsyncSendPooledTransactionHashes(hashes []common.Hash) {
 	select {
 	case p.txAnnounce <- hashes:
 		// Mark all the transactions as known, but ensure we don't overflow our limits
@@ -443,6 +408,22 @@ func (p *peer) AsyncSendTransactionHashes(hashes []common.Hash) {
 	}
 }
 
+// SendPooledTransactionsRLP sends requested transactions to the peer and adds the
+// hashes in its transaction hash set for future reference.
+//
+// Note, the method assumes the hashes are correct and correspond to the list of
+// transactions being sent.
+func (p *peer) SendPooledTransactionsRLP(hashes []common.Hash, txs []rlp.RawValue) 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, PooledTransactionsMsg, txs)
+}
+
 // SendNewBlockHashes announces the availability of a number of blocks through
 // a hash notification.
 func (p *peer) SendNewBlockHashes(hashes []common.Hash, numbers []uint64) error {
@@ -577,16 +558,6 @@ func (p *peer) RequestTxs(hashes []common.Hash) error {
 	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 {
@@ -746,9 +717,10 @@ func (ps *peerSet) Register(p *peer) error {
 		return errAlreadyRegistered
 	}
 	ps.peers[p.id] = p
+
 	go p.broadcastBlocks()
-	go p.broadcastTxs()
-	go p.retrievalTxs()
+	go p.broadcastTransactions()
+	go p.announceTransactions()
 
 	return nil
 }

eth/protocol.go

@@ -51,7 +51,7 @@ const protocolMaxMsgSize = 10 * 1024 * 1024 // Maximum cap on the size of a prot
 const (
 	StatusMsg          = 0x00
 	NewBlockHashesMsg  = 0x01
-	TxMsg              = 0x02
+	TransactionMsg     = 0x02
 	GetBlockHeadersMsg = 0x03
 	BlockHeadersMsg    = 0x04
 	GetBlockBodiesMsg  = 0x05
@@ -64,10 +64,11 @@ const (
 
 	// 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.
+	// Previously these message ids were used by some legacy and unsupported
+	// eth protocols, reown them here.
 	NewPooledTransactionHashesMsg = 0x08
 	GetPooledTransactionsMsg      = 0x09
+	PooledTransactionsMsg         = 0x0a
 )
 
 type errCode int

eth/protocol_test.go

@@ -62,7 +62,7 @@ func TestStatusMsgErrors63(t *testing.T) {
 		wantError error
 	}{
 		{
-			code: TxMsg, data: []interface{}{},
+			code: TransactionMsg, data: []interface{}{},
 			wantError: errResp(ErrNoStatusMsg, "first msg has code 2 (!= 0)"),
 		},
 		{
@@ -114,7 +114,7 @@ func TestStatusMsgErrors64(t *testing.T) {
 		wantError error
 	}{
 		{
-			code: TxMsg, data: []interface{}{},
+			code: TransactionMsg, data: []interface{}{},
 			wantError: errResp(ErrNoStatusMsg, "first msg has code 2 (!= 0)"),
 		},
 		{
@@ -258,7 +258,7 @@ func testRecvTransactions(t *testing.T, protocol int) {
 	defer p.close()
 
 	tx := newTestTransaction(testAccount, 0, 0)
-	if err := p2p.Send(p.app, TxMsg, []interface{}{tx}); err != nil {
+	if err := p2p.Send(p.app, TransactionMsg, []interface{}{tx}); err != nil {
 		t.Fatalf("send error: %v", err)
 	}
 	select {
@@ -282,13 +282,16 @@ func testSendTransactions(t *testing.T, protocol int) {
 	pm, _ := newTestProtocolManagerMust(t, downloader.FullSync, 0, nil, nil)
 	defer pm.Stop()
 
-	// Fill the pool with big transactions.
+	// Fill the pool with big transactions (use a subscription to wait until all
+	// the transactions are announced to avoid spurious events causing extra
+	// broadcasts).
 	const txsize = txsyncPackSize / 10
 	alltxs := make([]*types.Transaction, 100)
 	for nonce := range alltxs {
 		alltxs[nonce] = newTestTransaction(testAccount, uint64(nonce), txsize)
 	}
 	pm.txpool.AddRemotes(alltxs)
+	time.Sleep(100 * time.Millisecond) // Wait until new tx even gets out of the system (lame)
 
 	// Connect several peers. They should all receive the pending transactions.
 	var wg sync.WaitGroup
@@ -300,8 +303,6 @@ func testSendTransactions(t *testing.T, protocol int) {
 			seen[tx.Hash()] = false
 		}
 		for n := 0; n < len(alltxs) && !t.Failed(); {
-			var txs []*types.Transaction
-			var hashes []common.Hash
 			var forAllHashes func(callback func(hash common.Hash))
 			switch protocol {
 			case 63:
@@ -310,11 +311,15 @@ func testSendTransactions(t *testing.T, protocol int) {
 				msg, err := p.app.ReadMsg()
 				if err != nil {
 					t.Errorf("%v: read error: %v", p.Peer, err)
-				} else if msg.Code != TxMsg {
+					continue
+				} else if msg.Code != TransactionMsg {
 					t.Errorf("%v: got code %d, want TxMsg", p.Peer, msg.Code)
+					continue
 				}
+				var txs []*types.Transaction
 				if err := msg.Decode(&txs); err != nil {
 					t.Errorf("%v: %v", p.Peer, err)
+					continue
 				}
 				forAllHashes = func(callback func(hash common.Hash)) {
 					for _, tx := range txs {
@@ -325,11 +330,15 @@ func testSendTransactions(t *testing.T, protocol int) {
 				msg, err := p.app.ReadMsg()
 				if err != nil {
 					t.Errorf("%v: read error: %v", p.Peer, err)
+					continue
 				} else if msg.Code != NewPooledTransactionHashesMsg {
-					t.Errorf("%v: got code %d, want TxMsg", p.Peer, msg.Code)
+					t.Errorf("%v: got code %d, want NewPooledTransactionHashesMsg", p.Peer, msg.Code)
+					continue
 				}
+				var hashes []common.Hash
 				if err := msg.Decode(&hashes); err != nil {
 					t.Errorf("%v: %v", p.Peer, err)
+					continue
 				}
 				forAllHashes = func(callback func(hash common.Hash)) {
 					for _, h := range hashes {

eth/sync.go

@@ -38,13 +38,18 @@ const (
 )
 
 type txsync struct {
-	p      *peer
-	hashes []common.Hash
-	txs    []*types.Transaction
+	p   *peer
+	txs []*types.Transaction
 }
 
 // syncTransactions starts sending all currently pending transactions to the given peer.
 func (pm *ProtocolManager) syncTransactions(p *peer) {
+	// Assemble the set of transaction to broadcast or announce to the remote
+	// peer. Fun fact, this is quite an expensive operation as it needs to sort
+	// the transactions if the sorting is not cached yet. However, with a random
+	// order, insertions could overflow the non-executable queues and get dropped.
+	//
+	// TODO(karalabe): Figure out if we could get away with random order somehow
 	var txs types.Transactions
 	pending, _ := pm.txpool.Pending()
 	for _, batch := range pending {
@@ -53,17 +58,29 @@ func (pm *ProtocolManager) syncTransactions(p *peer) {
 	if len(txs) == 0 {
 		return
 	}
+	// The eth/65 protocol introduces proper transaction announcements, so instead
+	// of dripping transactions across multiple peers, just send the entire list as
+	// an announcement and let the remote side decide what they need (likely nothing).
+	if p.version >= eth65 {
+		hashes := make([]common.Hash, len(txs))
+		for i, tx := range txs {
+			hashes[i] = tx.Hash()
+		}
+		p.AsyncSendPooledTransactionHashes(hashes)
+		return
+	}
+	// Out of luck, peer is running legacy protocols, drop the txs over
 	select {
 	case pm.txsyncCh <- &txsync{p: p, txs: txs}:
 	case <-pm.quitSync:
 	}
 }
 
-// txsyncLoop takes care of the initial transaction sync for each new
+// txsyncLoop64 takes care of the initial transaction sync for each new
 // connection. When a new peer appears, we relay all currently pending
 // transactions. In order to minimise egress bandwidth usage, we send
 // the transactions in small packs to one peer at a time.
-func (pm *ProtocolManager) txsyncLoop() {
+func (pm *ProtocolManager) txsyncLoop64() {
 	var (
 		pending = make(map[enode.ID]*txsync)
 		sending = false               // whether a send is active
@@ -72,44 +89,26 @@ func (pm *ProtocolManager) txsyncLoop() {
 	)
 	// send starts a sending a pack of transactions from the sync.
 	send := func(s *txsync) {
+		if s.p.version >= eth65 {
+			panic("initial transaction syncer running on eth/65+")
+		}
 		// 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]
-		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) }()
+		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.SendTransactions64(pack.txs) }()
 	}
 
 	// pick chooses the next pending sync.

fuzzbuzz.yaml

@@ -26,6 +26,14 @@ targets:
       function: Fuzz
       package: github.com/ethereum/go-ethereum/tests/fuzzers/trie
       checkout: github.com/ethereum/go-ethereum/
+  - name: txfetcher
+    language: go
+    version: "1.13"
+    corpus: ./fuzzers/txfetcher/corpus
+    harness:
+      function: Fuzz
+      package: github.com/ethereum/go-ethereum/tests/fuzzers/txfetcher
+      checkout: github.com/ethereum/go-ethereum/
   - name: whisperv6
     language: go
     version: "1.13"

tests/fuzzers/txfetcher/corpus/0151ee1d0db4c74d3bcdfa4f7396a4c8538748c9-2

+ 
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/021d1144e359233c496e22c3250609b11b213e9f-4

+ TESTING KEY-----
+MIICXgIBAAKBgQDuLnQAI3mDgey3VBzWnB2L39JUU4txjeVE6myuDqkM/uGlfjb9
+SjY1bIw4iAJm2gsvvZhIrCHS3l6afab4pZB
+l2+XsDlrKBxKKtDrGxlG4LjncdabFn9gvLZad2bSysqz/qTAUStTtqJQIDAQAB
+AoGAGRzwwir7XvBOAy5tuV6ef6anZzus1s1Y1Clb6HbnWWF/wbZGOpet
+3m4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKZTXtdZrh+k7hx0nTP8Jcb
+uqFk541awmMogY/EfbWd6IOkp+4xqjlFBEDytgbIECQQDvH/6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz84SHEg1Ak/7KCxmD/sfgS5TeuNi8DoUBEmiSJwm7FX
+ftxuvL7XvjwjN5B30pNEbc6Iuyt7y4MQJBAIt21su43sjXNueLKH8+ph2UfQuU9txblTu14q3N7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xl
/DoCzjA0CQQDU
+y2pGsuSmgUtWj3NM9xuwYPm+Z/F84K6+ARYiZ6PYj013sovGKUFfYAqVXVlxtIoX
+qUn3Xh9ps8ZfjLZO7BAkEAlT4R5Yl6cGhaJQYZHOde3JMhNRcVFMO8dDaFo
+f9Oeos0UotgiDktdQHxdNEwLjQlJBz+OtwwA=---E RATTIEY-
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/0d28327b1fb52c1ba02a6eb96675c31633921bb2-2

+&^oȗ-----BEGIN RSA TESTING KEY-----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+-----END RSA TESTING KEY-----Q_
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/0fcd827b57ded58e91f7ba2ac2b7ea4d25ebedca-7

+ap
�

￿���V�#�&��
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/1adfa6b9ddf5766220c8ff7ede2926ca241bb947-3

+TAKBgDuLnQA3gey3VBznB39JUtxjeE6myuDkM/uGlfjb
+S1w4iA5sBzzh8uxEbi4nW91IJm2gsvvZhICHS3l6ab4pZB
+l2DulrKBxKKtD1rGxlG4LncabFn9vLZad2bSysqz/qTAUSTvqJQIDAQAB
+AoGAGRzwwir7XvBOAy5tM/uV6e+Zf6anZzus1s1Y1ClbjbE6HXbnWWF/wbZGOpet
+3Z4vMXc7jpTLryzTQIvVdfQbRc6+MUVeLKZatTXtdZrhu+Jk7hx0nTPy8Jcb
+uJqFk54MogxEcfbWd6IOkp+4xqFLBEDtgbIECnk+hgN4H
+qzzxxr397vWrjrIgbJpQvBv8QeeuNi8DoUBEmiSJwa7FXY
+FUtxuvL7XvjwjN5B30pEbc6Iuyt7y4MQJBAIt21su4b3sjphy2tuUE9xblTu14qgHZ6+AiZovGKU--FfYAqVXVlxtIX
+qyU3X9ps8ZfjLZ45l6cGhaJQYZHOde3JEMhNRcVFMO8dJDaFeo
+f9Oeos0UUothgiDktdQHxdNEwLjQf7lJJBzV+5OtwswCWA==
+-----END RSA T
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/1e14c7ea1faef92890988061b5abe96db7190f98-7

+0000000000000000000000000000000000000000000000000000000000000000000000000
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/1fd84ee194e791783a7f18f0a6deab8efe05fc04-2

+&
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/21e76b9fca21d94d97f860c1c82f40697a83471b-8

+DtQvfQ+MULKZTXk78c
+/fWkpxlQQ/+hgNzVtx9vWgJsafG7b0dA4AFjwVbFLmQcj2PprIMmPNQrooX
+L
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/23ddcd66aa92fe3d78b7f5b6e7cddb1b55c5f5df-3

+4txjeVE6myuDqkM/uGlfjb9
+SjY1bIw4iA5sBBZzHi3z0h1YV8QPuxEbi4nW91IJm2gsvvZeIrCHS3l6afab4pZB
+l2+XsDlrKBxKKtD1rGxlG4jncdabFn9gvLZad2bSysqz/qTAUSTvqJQIDAQAB
+AoGAGRzwwXvBOAy5tM/uV6e+Zf6aZzus1s1Y1ClbjbE6HXbnWWF/wbZGOpet
+3Z4vD6Mc7pLryzTQIVdfQbRc6+MUVeLKZaTXtdZru+Jk70PJJqFk541aEw+mMogY/xEcfbWd6IOkp+4xqjlFLBEDytgbIECQQDvH/E6nk+gN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQ2PprIMPcQroo8vpjSHg1Ev14KxmQeDydfsgeuN8UBESJwm7F
+UtuL7Xvjw50pNEbc6Iuyty4QJA21su4sjXNueLQphy2U
+fQtuUE9txblTu14qN7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xlp/DoCzjA0CQQDU
+y2ptGsuSmgUtWj3NM9xuwYPm+Z/F84K6ARYiZPYj1oGUFfYAVVxtI
+qyBnu3X9pfLZOAkEAlT4R5Yl6cJQYZHOde3JEhNRcVFMO8dJFo
+f9Oeos0UUhgiDkQxdEwLjQf7lJJz5OtwC=
+-NRSA TESINGKEY-Q_
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/30494b85bb60ad7f099fa49d427007a761620d8f-5

+jXbnWWF/wbZGOpet
+3Zm4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKwZatTXtdZrhu+Jk7hx0nTPy8Jcb
+uJqFk541aEw+mMogY/xEcfbWd6IOkp+4xqjlFLBEDytgbIECQQDvH/E6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz8vp
+jy4SHEg1AkEA/v13/5M47K9vCxb8QeD/asydfsgS5TeuNi8DoUBEmiSJwma7FXY
+fFUtxuvL7XvjwjN5B30pNEbc6Iuyt7y4MQJBAIt21su4b3sjXNueLKH85Q+phy2U
+fQtuUE9txblTu14q3N7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xl
/DoCzjA0CQQDU
+y2ptGsuSmgUtWj3NM9xuwYPm+Z/F84K6+ARYiZ6Yj013sovGKUFfYAqVXVlxtIX
+qyUBnu3Xh9ps8ZfjLZO7BAkEAlT4R5Yl6cGhaJQYZHOde3JEMhNRcVFMO8dDaFeo
+f9Oeos0UotgiDktdQHxdNEwLjQfl
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/316024ca3aaf09c1de5258733ff5fe3d799648d3-4

+^oȗ----BEGIN RA TTING KEY-----
+IIXgIBAAKBQDuLnQI3mDgey3VBzWnB2L39JUU4txjeVE6myuDqkM/uGlfjb9
+SjY1bIw4iA5sBBZzHi3z0h1YV8QPuxEbi4nW91IJmgsvvZhrCHSl6afab4pZB
+l2+XsDulrKBxKKtD1rGxlG4LjcdabF9gvLZad2bSysqz/qTAUStTvqJQDAQAB
+AoGAGRzwwir7XvBOAy5tM/uV6e+Zf6anZzus1s1Y1ClbjbE6HXbnWWF/wbZGOpet
+3Z4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKwZatTXtdZrhu+Jk7hx0nTPy8Jcb
+uJqFk541aEw+mMogY/xEcfbWd6IOkp+4xqjlFLBEDytgbIECQQDvH/E6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz8vp
+jy4SHEg1AkEA/v13/5M47K9vCxmb8QeD/asydfsgS5TeuNi8DoUBEmiSJwma7FXY
+fFUtxuvL7XvjwjN5B30pNEbc6Iuyt7y4MQJBAIt21su4b3sjXNueLKH85Q+phy2U
+fQtuUE9txblTu14q3N7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xlp/DoCzjA0CQQDU
+y2ptGsuSmgUtWj3NM9xuwYPm+Z/F84K6+ARYiZ6PYj043sovGKUFfYAqVXVlxtIX
+qyUBnu3X9ps8ZfjLZO7BAkEAlT4R5Yl6cGhaJQYZHOde3JEMhNRcVFMO8dJDaFeo
+f9Oeos0UUothgiDktdQHxdNEwLjQf7lJJBzV+5OtwswCWA==
+-----END RSA TESTING KEY-----Q_
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/33ec1dc0bfeb93d16edee3c07125fec6ac1aa17d-2

+
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/3a010483a4ad8d7215447ce27e0fac3791235c99-4

+
+lGAGRzwwir7XvBOAy5tM/uV6e+Zf6anZzus1s1Y1ClbjbE6HXbnWWF/wbZGOpet
+3Zm4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKwZatTXtdZrhu+Jk7hx0nTPy8Jcb
+uJqFk541aEw+mMogY/xEcfbWd6IOkp+4xqjlFLBEDytgbIECQQDvH/E6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz8vp
+jy4SHEg1AkEA/v13/5M47K9vCxmb8QeD/asydfsgS5TeuNi8DoUBEmiSJwma7FXY
+fFUtxuvL7XvjwjN5
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/3c37f6d58b8029971935f127f53e6aaeba558445-6

+w�€
�

�
�
�
�
�
�
�
�	
�
+
�
�
�

�
�
�

�
�
�
�
�
�
�
�
�
�
�
�
�
�
� 
�!
�"
�#
�$
�%
�&
�'
�(
�)
�*
�+
�,
�-
�.
�/
0
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/3c73b63bafa9f535c882ec17189adaf02b58f432-6

+LvhaJQHOe3EhRcdaFofeoogkjQfJB
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/3f99c546a3962256176d566c19e3fffb62072078-1

+&^o
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/436154e5bb6487673f6642e6d2a582c01b083c08-8

+apfffffffffffffffffffffffffffffffebadce6f48a0_3bbfd2364
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/4a0a12f5b033c8c160cc3b5133692ea1e92c6cdf-7

+DtQvfQ+MULKZTXk78c
+/fWkpxlyEQQ/+hgNzVtx9vWgJsafG7b0dA4AFjwVbFLmQcj2PprIMmPNQg1Ak/7KCxmDgS5TDEmSJwFX
+txLjbt4xTgeXVlXsjLZ
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/5570ef82893a9b9b9158572d43a7de7537121d2d-1

+
�ٯ0,1,2,3,4,5,6,7,-3420794409,(2,a)
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/61e89c3fbdf9eff74bd250ea73cc2e61f8ca0d97-5

+88242871'392752200424491531672177074144720616417147514758635765020556616
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/6782da8f1a432a77306d60d2ac2470c35b98004f-3

+21888242871'392752200424452601091531672177074144720616417147514758635765020556616 
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/6a5059bc86872526241d21ab5dae9f0afd3b9ae1-3

+¿½
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/717928e0e2d478c680c6409b173552ca98469ba5-6

+LvhaJcdaFofenogkjQfJB
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/7312a0f31ae5d773ed4fd74abc7521eb14754683-8

+DtQvfQ+MULKZTXk78c
+/fWkpxlyEQQ/+hgNzVtx9vWgJsafG7b0dA4AFjwVbFLmQcj2PprIMmPNQg1AkS5TDEmSJwFVlXsjLZ
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/78480977d5c07386b06e9b37f5c82f5ed86c2f09-3

+ TESTING KEY-----
+MIICXgIBAAKBgQDuLnQAI3mDgey3VBzWnB2L39JUU4txjeVE6myuDqkM/uGlfjb9
+SjY1bIw4iAJm2gsvvZhIrCHS3l6afab4pZB
+l2+XsDulrKBxKKtD1rGxlG4LjncdabFn9gvLZad2bSysqz/qTAUStTvqJQIDAQAB
+AoGAGRzwwir7XvBOAy5tM/uV6e+Zf6anZzus1s1Y1ClbjbE6HXbnWWF/wbZGOpet
+3Zm4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKwZatTXtdZrhu+Jk7hx0nTPy8Jcb
+uJqFk541aEw+mMogY/xEcfbWd6IOkp+4xqjlFLBEDytgbIECQQDvH/E6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz8vp
+jy4SHEg1AkEA/v13/5M47K9vCxmb8QeD/asydfsgS5TeuNi8DoUBEmiSJwma7FXY
+fFUtxuvL7XvjwjN5B30pNEbc6Iuyt7y4MQJBAIt21su4b3sjXNueLKH85Q+phy2U
+fQtuUE9txblTu14q3N7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xl
/DoCzjA0CQQDU
+y2ptGsuSmgUtWj3NM9xuwYPm+Z/F84K6+ARYiZ6PYj013sovGKUFfYAqVXVlxtIX
+qyUBnu3Xh9ps8ZfjLZO7BAkEAlT4R5Yl6cGhaJQYZHOde3JEMhNRcVFMO8dDaFeo
+f9Oeos0UotgiDktdQHxdNEwLjQflJJBzV+5OtwswCA=----EN RATESTI EY-----Q
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/7a113cd3c178934cdb64353af86d51462d7080a4-5

+l6afab4pZB
+l2+XsDlrKBxKKtDrGxlG4LjncdabFn9gvLZad2bSysqz/qTAUStTtqJQIDAQAB
+AoGAGRzwwir7XvBOAy5tuV6ef6anZzus1s1Y1Clb6HbnWWF/wbZGOpet
+3m4vD6MXc7jpTLryzTQIvVdfQbRc6+MUVeLKZTXtdZrh+k7hx0nTP8Jcb
+uqFk541awmMogY/EfbWd6IOkp+4xqjlFBEDytgbIECQQDvH/6nk+hgN4H
+qzzVtxxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLmQcj2PprIMmPcQrooz84SHEg1Ak/7KCxmD/sfgS5TeuNi8DoUBEmiSJwm7FX
+ftxuvL7XvjwjN5B30pNEbc6Iuyt7y4MQJBAIt21su43sjXNueLKH8+ph2UfQuU9txblTu14q3N7gHRZB4ZMhFYyDy8CKrN2cPg/Fvyt0Xl
/DoCzjA0CQQDU
+y2pGsuSmgUtWj3NM9xuwYPm+Z/F84K6+ARYiZ6PYj13sovGKUFfYAqVXVlxtIoX
+qUn3X9ps8ZfjLZO7BAkEAlT4R5Yl6cGhaJQYZHOde3JMhNRcVFMO8dDaFo
+f9Oeos0UotgiDktdQHxdNEwLjQlJBz+OtwwA=---E ATTIEY-
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/7ea9f71020f3eb783f743f744eba8d8ca4b2582f-3

+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tests/fuzzers/txfetcher/corpus/84f8c275f3ffbaf8c32c21782af13de10e7de28b-3

+KKtDlbjVeLKwZatTXtdZrhu+Jk7hx0xxr397vWrjrIgPbJpQvBsafG7b0dA4AFjwVbFLQcmPcQETT YQ
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/9034aaf45143996a2b14465c352ab0c6fa26b221-2

+½
\ No newline at end of file

tests/fuzzers/txfetcher/corpus/92cefdc6251d04896349a464b29be03d6bb04c3d-2

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tests/fuzzers/txfetcher/corpus/9ebcbbfdaf0e98c87652e57226a4d8a35170c67d-4

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tests/fuzzers/txfetcher/corpus/9ff520eb8b8319a5fdafbe4d1cbb02a75058d93b-7

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tests/fuzzers/txfetcher/corpus/a8f7c254eb64a40fd2a77b79979c7bbdac6a760c-4

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tests/fuzzers/txfetcher/corpus/aa7444d8e326158046862590a0db993c07aef372-7

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tests/fuzzers/txfetcher/corpus/ae4593626d8796e079a358c2395a4f6c9ddd6a44-6

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tests/fuzzers/txfetcher/corpus/b631ef3291fa405cd6517d11f4d1b9b6d02912d4-2

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tests/fuzzers/txfetcher/corpus/b858cb282617fb0956d960215c8e84d1ccf909c6-2

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tests/fuzzers/txfetcher/corpus/bc9d570aacf3acd39600feda8e72a293a4667da4-1

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tests/fuzzers/txfetcher/corpus/be7eed35b245b5d5d2adcdb4c67f07794eb86b24-3

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tests/fuzzers/txfetcher/corpus/c010b0cd70c7edbc5bd332fc9e2e91c6a1cbcdc4-5

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tests/fuzzers/txfetcher/corpus/c1690698607eb0f4c4244e9f9629968be4beb6bc-8

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\ No newline at end of file