Feature/shutdown restart

interface.go

@@ -18,6 +18,7 @@ type PeerManagerI interface {
 	RequestBlock(blockHash *chainhash.Hash) PeerI
 	AddPeer(peer PeerI) error
 	GetPeers() []PeerI
+	Shutdown()
 }
 
 type PeerI interface {
@@ -30,6 +31,8 @@ type PeerI interface {
 	RequestBlock(blockHash *chainhash.Hash)
 	Network() wire.BitcoinNet
 	IsHealthy() bool
+	Shutdown()
+	Restart()
 }
 
 type PeerHandlerI interface {

peer.go

@@ -35,6 +35,7 @@ const (
 	sentMsg     = "Sent"
 	receivedMsg = "Recv"
 
+	nrWriteHandlersDefault               = 10
 	retryReadWriteMessageIntervalDefault = 1 * time.Second
 	retryReadWriteMessageAttempts        = 5
 	reconnectInterval                    = 10 * time.Second
@@ -74,6 +75,7 @@ type Peer struct {
 	userAgentName                 *string
 	userAgentVersion              *string
 	retryReadWriteMessageInterval time.Duration
+	nrWriteHandlers               int
 
 	ctx context.Context
 
@@ -107,6 +109,7 @@ func NewPeer(logger *slog.Logger, address string, peerHandler PeerHandlerI, netw
 		peerHandler:                   peerHandler,
 		logger:                        peerLogger,
 		dial:                          net.Dial,
+		nrWriteHandlers:               nrWriteHandlersDefault,
 		maximumMessageSize:            defaultMaximumMessageSize,
 		batchDelay:                    defaultBatchDelayMilliseconds * time.Millisecond,
 		retryReadWriteMessageInterval: retryReadWriteMessageIntervalDefault,
@@ -125,6 +128,12 @@ func NewPeer(logger *slog.Logger, address string, peerHandler PeerHandlerI, netw
 		}
 	}
 
+	p.start()
+
+	return p, nil
+}
+
+func (p *Peer) start() {
 	ctx, cancelAll := context.WithCancel(context.Background())
 	p.cancelAll = cancelAll
 	p.ctx = ctx
@@ -140,20 +149,18 @@ func NewPeer(logger *slog.Logger, address string, peerHandler PeerHandlerI, netw
 
 	if p.incomingConn != nil {
 		go func() {
-			connectErr := p.connectAndStartReadWriteHandlers()
-			if connectErr != nil {
+			err := p.connectAndStartReadWriteHandlers()
+			if err != nil {
 				p.logger.Warn("Failed to connect to peer", slog.String(errKey, err.Error()))
 			}
 		}()
 		p.logger.Info("Incoming connection from peer")
-		return p, nil
+		return
 	}
 
 	// reconnect if disconnected, but only on outgoing connections
 	p.reconnectingWg.Add(1)
 	go p.reconnect()
-
-	return p, nil
 }
 
 func (p *Peer) disconnectLock() {
@@ -230,7 +237,7 @@ func (p *Peer) connectAndStartReadWriteHandlers() error {
 
 	writerCtx, cancelWriter := context.WithCancel(p.ctx)
 	p.cancelWriteHandler = cancelWriter
-	for i := 0; i < 10; i++ {
+	for i := 0; i < p.nrWriteHandlers; i++ {
 		// start 10 workers that will write to the peer
 		// locking is done in the net.write in the wire/message handler
 		// this reduces the wait on the writer when processing writes (for example HandleTransactionSent)
@@ -778,7 +785,7 @@ func (p *Peer) pingHandler() {
 		case <-pingTicker.C:
 			nonce, err := wire.RandomUint64()
 			if err != nil {
-				p.logger.Error("Not sending ping", slog.String(errKey, err.Error()))
+				p.logger.Error("Failed to create random nonce - not sending ping", slog.String(errKey, err.Error()))
 				continue
 			}
 			p.writeChan <- wire.NewMsgPing(nonce)
@@ -810,6 +817,7 @@ func (p *Peer) monitorConnectionHealth() {
 		case <-checkConnectionHealthTicker.C:
 			p.mu.Lock()
 			p.isHealthy = false
+			p.logger.Warn("peer unhealthy")
 			p.mu.Unlock()
 		case <-p.ctx.Done():
 			return
@@ -844,6 +852,12 @@ func (p *Peer) stopWriteHandler() {
 	p.writerWg.Wait()
 }
 
+func (p *Peer) Restart() {
+	p.Shutdown()
+
+	p.start()
+}
+
 func (p *Peer) Shutdown() {
 	p.cancelAll()
 

peer_manager.go

@@ -67,18 +67,28 @@ func (pm *PeerManager) GetPeers() []PeerI {
 	return peers
 }
 
+func (pm *PeerManager) Shutdown() {
+	for _, peer := range pm.peers {
+		peer.Shutdown()
+	}
+}
+
 // AnnounceTransaction will send an INV message to the provided peers or to selected peers if peers is nil
 // it will return the peers that the transaction was actually announced to
 func (pm *PeerManager) AnnounceTransaction(txHash *chainhash.Hash, peers []PeerI) []PeerI {
 	if len(peers) == 0 {
 		peers = pm.GetAnnouncedPeers()
 	}
 
+	announcedPeers := make([]PeerI, 0, len(peers))
 	for _, peer := range peers {
-		peer.AnnounceTransaction(txHash)
+		if peer.Connected() && peer.IsHealthy() {
+			peer.AnnounceTransaction(txHash)
+			announcedPeers = append(announcedPeers, peer)
+		}
 	}
 
-	return peers
+	return announcedPeers
 }
 
 func (pm *PeerManager) RequestTransaction(txHash *chainhash.Hash) PeerI {

peer_mock.go

@@ -121,12 +121,8 @@ func (p *PeerMock) message(msg wire.Message) {
 	p.messages = append(p.messages, msg)
 }
 
-// func (p *PeerMock) getMessages() []wire.Message {
-// 	p.mu.Lock()
-// 	defer p.mu.Unlock()
-
-// 	return p.messages
-// }
+func (p *PeerMock) Shutdown() {}
+func (p *PeerMock) Restart()  {}
 
 func (p *PeerMock) WriteMsg(msg wire.Message) error {
 	p.writeChan <- msg

peer_options.go

@@ -54,3 +54,10 @@ func WithRetryReadWriteMessageInterval(d time.Duration) PeerOptions {
 		return nil
 	}
 }
+
+func WithNrOfWriteHandlers(NrWriteHandlers int) PeerOptions {
+	return func(p *Peer) error {
+		p.nrWriteHandlers = NrWriteHandlers
+		return nil
+	}
+}

peer_test.go

@@ -136,7 +136,7 @@ func TestShutdown(t *testing.T) {
 						break connectLoop
 					}
 				case <-time.NewTimer(1 * time.Second).C:
-					t.Fatal("peer did not disconnect")
+					t.Fatal("peer did not connect")
 				}
 			}
 
@@ -152,6 +152,120 @@ func TestShutdown(t *testing.T) {
 	}
 }
 
+func TestRestart(t *testing.T) {
+	tt := []struct {
+		name string
+	}{
+		{
+			name: "Restart",
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.name, func(t *testing.T) {
+			peerConn, myConn := connutil.AsyncPipe()
+
+			peerHandler := NewMockPeerHandler()
+			logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: slog.LevelDebug}))
+			p, err := NewPeer(
+				logger,
+				"MockPeerHandler:0000",
+				peerHandler,
+				wire.MainNet,
+				WithDialer(func(network, address string) (net.Conn, error) {
+					return peerConn, nil
+				}),
+				WithRetryReadWriteMessageInterval(200*time.Millisecond),
+			)
+			require.NoError(t, err)
+
+			t.Log("handshake 1")
+			handshakeFinished := make(chan struct{})
+			go func() {
+				doHandshake(t, p, myConn)
+				handshakeFinished <- struct{}{}
+			}()
+
+			select {
+			case <-handshakeFinished:
+				t.Log("handshake 1 finished")
+			case <-time.After(5 * time.Second):
+				t.Fatal("handshake 1 timeout")
+			}
+			// wait for the peer to be connected
+		connectLoop:
+			for {
+				select {
+				case <-time.NewTicker(10 * time.Millisecond).C:
+					if p.Connected() {
+						break connectLoop
+					}
+				case <-time.NewTimer(1 * time.Second).C:
+					t.Fatal("peer did not connect")
+				}
+			}
+
+			invMsg := wire.NewMsgInv()
+			hash, err := chainhash.NewHashFromStr(tx1)
+			require.NoError(t, err)
+			err = invMsg.AddInvVect(wire.NewInvVect(wire.InvTypeTx, hash))
+			require.NoError(t, err)
+
+			t.Log("restart")
+			p.Restart()
+
+			// wait for the peer to be disconnected
+		disconnectLoop:
+			for {
+				select {
+				case <-time.NewTicker(10 * time.Millisecond).C:
+					if !p.Connected() {
+						break disconnectLoop
+					}
+				case <-time.NewTimer(5 * time.Second).C:
+					t.Fatal("peer did not disconnect")
+				}
+			}
+
+			//time.Sleep(15 * time.Second)
+			// recreate connection
+			p.mu.Lock()
+			peerConn, myConn = connutil.AsyncPipe()
+			p.mu.Unlock()
+			t.Log("new connection created")
+
+			time.Sleep(5 * time.Second)
+			t.Log("handshake 2")
+
+			go func() {
+				doHandshake(t, p, myConn)
+				handshakeFinished <- struct{}{}
+			}()
+
+			select {
+			case <-handshakeFinished:
+				t.Log("handshake 2 finished")
+			case <-time.After(5 * time.Second):
+				t.Fatal("handshake 2 timeout")
+			}
+
+			t.Log("reconnect")
+			// wait for the peer to be reconnected
+		reconnectLoop:
+			for {
+				select {
+				case <-time.NewTicker(10 * time.Millisecond).C:
+					if p.Connected() {
+						break reconnectLoop
+					}
+				case <-time.NewTimer(1 * time.Second).C:
+					t.Fatal("peer did not reconnect")
+				}
+			}
+		})
+	}
+}
+
 func TestReconnect(t *testing.T) {
 	tt := []struct {
 		name       string