You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
172 lines
4.2 KiB
172 lines
4.2 KiB
package mempool
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"reflect"
|
|
"time"
|
|
|
|
"github.com/tendermint/go-clist"
|
|
. "github.com/tendermint/go-common"
|
|
"github.com/tendermint/go-p2p"
|
|
"github.com/tendermint/go-wire"
|
|
"github.com/tendermint/go-events"
|
|
"github.com/tendermint/tendermint/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
|
|
Mempool *Mempool // TODO: un-expose
|
|
evsw *events.EventSwitch
|
|
}
|
|
|
|
func NewMempoolReactor(mempool *Mempool) *MempoolReactor {
|
|
memR := &MempoolReactor{
|
|
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.Info("Receive", "src", src, "chId", chID, "msg", msg)
|
|
|
|
switch msg := msg.(type) {
|
|
case *TxMessage:
|
|
err := memR.Mempool.CheckTx(msg.Tx)
|
|
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) error {
|
|
return memR.Mempool.CheckTx(tx)
|
|
}
|
|
|
|
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) {
|
|
var next *clist.CElement
|
|
for {
|
|
if !memR.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 *events.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)
|
|
}
|