/usr/share/gocode/src/github.com/tendermint/tendermint/mempool/reactor.go is in golang-github-tendermint-tendermint-dev 0.8.0+git20170113.0.764091d-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | package mempool
import (
"bytes"
"fmt"
"reflect"
"time"
"github.com/tendermint/go-clist"
. "github.com/tendermint/go-common"
cfg "github.com/tendermint/go-config"
"github.com/tendermint/go-p2p"
"github.com/tendermint/go-wire"
"github.com/tendermint/tendermint/types"
abci "github.com/tendermint/abci/types"
)
const (
MempoolChannel = byte(0x30)
maxMempoolMessageSize = 1048576 // 1MB TODO make it configurable
peerCatchupSleepIntervalMS = 100 // If peer is behind, sleep this amount
)
// MempoolReactor handles mempool tx broadcasting amongst peers.
type MempoolReactor struct {
p2p.BaseReactor
config cfg.Config
Mempool *Mempool
evsw types.EventSwitch
}
func NewMempoolReactor(config cfg.Config, mempool *Mempool) *MempoolReactor {
memR := &MempoolReactor{
config: config,
Mempool: mempool,
}
memR.BaseReactor = *p2p.NewBaseReactor(log, "MempoolReactor", memR)
return memR
}
// Implements Reactor
func (memR *MempoolReactor) GetChannels() []*p2p.ChannelDescriptor {
return []*p2p.ChannelDescriptor{
&p2p.ChannelDescriptor{
ID: MempoolChannel,
Priority: 5,
},
}
}
// Implements Reactor
func (memR *MempoolReactor) AddPeer(peer *p2p.Peer) {
go memR.broadcastTxRoutine(peer)
}
// Implements Reactor
func (memR *MempoolReactor) RemovePeer(peer *p2p.Peer, reason interface{}) {
// broadcast routine checks if peer is gone and returns
}
// Implements Reactor
func (memR *MempoolReactor) Receive(chID byte, src *p2p.Peer, msgBytes []byte) {
_, msg, err := DecodeMessage(msgBytes)
if err != nil {
log.Warn("Error decoding message", "error", err)
return
}
log.Debug("Receive", "src", src, "chId", chID, "msg", msg)
switch msg := msg.(type) {
case *TxMessage:
err := memR.Mempool.CheckTx(msg.Tx, nil)
if err != nil {
// Bad, seen, or conflicting tx.
log.Info("Could not add tx", "tx", msg.Tx)
return
} else {
log.Info("Added valid tx", "tx", msg.Tx)
}
// broadcasting happens from go routines per peer
default:
log.Warn(Fmt("Unknown message type %v", reflect.TypeOf(msg)))
}
}
// Just an alias for CheckTx since broadcasting happens in peer routines
func (memR *MempoolReactor) BroadcastTx(tx types.Tx, cb func(*abci.Response)) error {
return memR.Mempool.CheckTx(tx, cb)
}
type PeerState interface {
GetHeight() int
}
type Peer interface {
IsRunning() bool
Send(byte, interface{}) bool
Get(string) interface{}
}
// Send new mempool txs to peer.
// TODO: Handle mempool or reactor shutdown?
// As is this routine may block forever if no new txs come in.
func (memR *MempoolReactor) broadcastTxRoutine(peer Peer) {
if !memR.config.GetBool("mempool_broadcast") {
return
}
var next *clist.CElement
for {
if !memR.IsRunning() || !peer.IsRunning() {
return // Quit!
}
if next == nil {
// This happens because the CElement we were looking at got
// garbage collected (removed). That is, .NextWait() returned nil.
// Go ahead and start from the beginning.
next = memR.Mempool.TxsFrontWait() // Wait until a tx is available
}
memTx := next.Value.(*mempoolTx)
// make sure the peer is up to date
height := memTx.Height()
if peerState_i := peer.Get(types.PeerStateKey); peerState_i != nil {
peerState := peerState_i.(PeerState)
if peerState.GetHeight() < height-1 { // Allow for a lag of 1 block
time.Sleep(peerCatchupSleepIntervalMS * time.Millisecond)
continue
}
}
// send memTx
msg := &TxMessage{Tx: memTx.tx}
success := peer.Send(MempoolChannel, struct{ MempoolMessage }{msg})
if !success {
time.Sleep(peerCatchupSleepIntervalMS * time.Millisecond)
continue
}
next = next.NextWait()
continue
}
}
// implements events.Eventable
func (memR *MempoolReactor) SetEventSwitch(evsw types.EventSwitch) {
memR.evsw = evsw
}
//-----------------------------------------------------------------------------
// Messages
const (
msgTypeTx = byte(0x01)
)
type MempoolMessage interface{}
var _ = wire.RegisterInterface(
struct{ MempoolMessage }{},
wire.ConcreteType{&TxMessage{}, msgTypeTx},
)
func DecodeMessage(bz []byte) (msgType byte, msg MempoolMessage, err error) {
msgType = bz[0]
n := new(int)
r := bytes.NewReader(bz)
msg = wire.ReadBinary(struct{ MempoolMessage }{}, r, maxMempoolMessageSize, n, &err).(struct{ MempoolMessage }).MempoolMessage
return
}
//-------------------------------------
type TxMessage struct {
Tx types.Tx
}
func (m *TxMessage) String() string {
return fmt.Sprintf("[TxMessage %v]", m.Tx)
}
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