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145 lines
3.0 KiB
145 lines
3.0 KiB
package mempool
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import (
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"bytes"
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"fmt"
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"sync/atomic"
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"github.com/tendermint/tendermint/binary"
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"github.com/tendermint/tendermint/p2p"
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"github.com/tendermint/tendermint/types"
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)
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var (
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MempoolChannel = byte(0x30)
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)
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// MempoolReactor handles mempool tx broadcasting amongst peers.
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type MempoolReactor struct {
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sw *p2p.Switch
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quit chan struct{}
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started uint32
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stopped uint32
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Mempool *Mempool
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}
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func NewMempoolReactor(mempool *Mempool) *MempoolReactor {
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memR := &MempoolReactor{
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quit: make(chan struct{}),
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Mempool: mempool,
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}
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return memR
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}
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// Implements Reactor
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func (memR *MempoolReactor) Start(sw *p2p.Switch) {
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if atomic.CompareAndSwapUint32(&memR.started, 0, 1) {
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memR.sw = sw
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log.Info("Starting MempoolReactor")
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}
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}
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// Implements Reactor
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func (memR *MempoolReactor) Stop() {
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if atomic.CompareAndSwapUint32(&memR.stopped, 0, 1) {
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log.Info("Stopping MempoolReactor")
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close(memR.quit)
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}
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}
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// Implements Reactor
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func (memR *MempoolReactor) GetChannels() []*p2p.ChannelDescriptor {
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return []*p2p.ChannelDescriptor{
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&p2p.ChannelDescriptor{
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Id: MempoolChannel,
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Priority: 5,
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},
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}
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}
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// Implements Reactor
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func (pexR *MempoolReactor) AddPeer(peer *p2p.Peer) {
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}
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// Implements Reactor
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func (pexR *MempoolReactor) RemovePeer(peer *p2p.Peer, reason interface{}) {
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}
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// Implements Reactor
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func (memR *MempoolReactor) Receive(chId byte, src *p2p.Peer, msgBytes []byte) {
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_, msg_, err := DecodeMessage(msgBytes)
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if err != nil {
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log.Warn("Error decoding message", "error", err)
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return
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}
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log.Info("MempoolReactor received message", "msg", msg_)
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switch msg := msg_.(type) {
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case *TxMessage:
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err := memR.Mempool.AddTx(msg.Tx)
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if err != nil {
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// Bad, seen, or conflicting tx.
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log.Debug("Could not add tx", "tx", msg.Tx)
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return
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} else {
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log.Debug("Added valid tx", "tx", msg.Tx)
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}
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// Share tx.
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// We use a simple shotgun approach for now.
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// TODO: improve efficiency
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for _, peer := range memR.sw.Peers().List() {
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if peer.Key == src.Key {
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continue
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}
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peer.TrySend(MempoolChannel, msg)
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}
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default:
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// Ignore unknown message
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}
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}
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func (memR *MempoolReactor) BroadcastTx(tx types.Tx) error {
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err := memR.Mempool.AddTx(tx)
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if err != nil {
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return err
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}
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msg := &TxMessage{Tx: tx}
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memR.sw.Broadcast(MempoolChannel, msg)
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return nil
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}
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//-----------------------------------------------------------------------------
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// Messages
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const (
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msgTypeUnknown = byte(0x00)
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msgTypeTx = byte(0x10)
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)
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// TODO: check for unnecessary extra bytes at the end.
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func DecodeMessage(bz []byte) (msgType byte, msg interface{}, err error) {
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n := new(int64)
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msgType = bz[0]
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r := bytes.NewReader(bz)
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switch msgType {
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case msgTypeTx:
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msg = binary.ReadBinary(&TxMessage{}, r, n, &err)
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default:
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msg = nil
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}
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return
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}
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//-------------------------------------
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type TxMessage struct {
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Tx types.Tx
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}
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func (m *TxMessage) TypeByte() byte { return msgTypeTx }
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func (m *TxMessage) String() string {
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return fmt.Sprintf("[TxMessage %v]", m.Tx)
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}
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