251 lines
6.9 KiB
Go
251 lines
6.9 KiB
Go
package main
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import (
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"context"
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"fmt"
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"github.com/libp2p/go-libp2p-core/peer"
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"github.com/multiformats/go-multiaddr"
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"strings"
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"time"
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"github.com/libp2p/go-libp2p"
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connmgr "github.com/libp2p/go-libp2p-connmgr"
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"github.com/libp2p/go-libp2p-core/crypto"
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"github.com/libp2p/go-libp2p-core/host"
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"github.com/libp2p/go-libp2p-core/protocol"
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"github.com/libp2p/go-libp2p-core/routing"
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dht "github.com/libp2p/go-libp2p-kad-dht"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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libp2pquic "github.com/libp2p/go-libp2p-quic-transport"
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libp2ptls "github.com/libp2p/go-libp2p-tls"
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"go.uber.org/zap"
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"google.golang.org/protobuf/proto"
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"github.com/certusone/wormhole/bridge/pkg/devnet"
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gossipv1 "github.com/certusone/wormhole/bridge/pkg/proto/gossip/v1"
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"github.com/certusone/wormhole/bridge/pkg/supervisor"
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)
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func p2p(obsvC chan *gossipv1.LockupObservation, sendC chan []byte) func(ctx context.Context) error {
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return func(ctx context.Context) (re error) {
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logger := supervisor.Logger(ctx)
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var priv crypto.PrivKey
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var err error
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if *unsafeDevMode {
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idx, err2 := devnet.GetDevnetIndex()
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if err2 != nil {
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logger.Fatal("Failed to parse hostname - are we running in devnet?")
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}
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priv = devnet.DeterministicP2PPrivKeyByIndex(int64(idx))
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} else {
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priv, err = getOrCreateNodeKey(logger, *nodeKeyPath)
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if err != nil {
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return fmt.Errorf("failed to load node key: %w", err)
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}
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}
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var idht *dht.IpfsDHT
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h, err := libp2p.New(ctx,
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// Use the keypair we generated
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libp2p.Identity(priv),
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// Multiple listen addresses
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libp2p.ListenAddrStrings(
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// Listen on QUIC only.
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// TODO(leo): is this more or less stable than using both TCP and QUIC transports?
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// https://github.com/libp2p/go-libp2p/issues/688
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fmt.Sprintf("/ip4/0.0.0.0/udp/%d/quic", *p2pPort),
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fmt.Sprintf("/ip6/::/udp/%d/quic", *p2pPort),
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),
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// Enable TLS security as the only security protocol.
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libp2p.Security(libp2ptls.ID, libp2ptls.New),
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// Enable QUIC transport as the only transport.
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libp2p.Transport(libp2pquic.NewTransport),
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// Let's prevent our peer from having too many
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// connections by attaching a connection manager.
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libp2p.ConnectionManager(connmgr.NewConnManager(
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100, // Lowwater
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400, // HighWater,
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time.Minute, // GracePeriod
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)),
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// Let this host use the DHT to find other hosts
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libp2p.Routing(func(h host.Host) (routing.PeerRouting, error) {
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// TODO(leo): Persistent data store (i.e. address book)
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idht, err = dht.New(ctx, h, dht.Mode(dht.ModeServer),
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// TODO(leo): This intentionally makes us incompatible with the global IPFS DHT
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dht.ProtocolPrefix(protocol.ID("/"+*p2pNetworkID)),
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)
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return idht, err
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}),
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)
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if err != nil {
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panic(err)
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}
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defer func() {
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// TODO: libp2p cannot be cleanly restarted (https://github.com/libp2p/go-libp2p/issues/992)
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logger.Error("p2p routine has exited, cancelling root context...", zap.Error(re))
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rootCtxCancel()
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}()
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logger.Info("Connecting to bootstrap peers", zap.String("bootstrap_peers", *p2pBootstrap))
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topic := fmt.Sprintf("%s/%s", *p2pNetworkID, "broadcast")
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logger.Info("Subscribing pubsub topic", zap.String("topic", topic))
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ps, err := pubsub.NewGossipSub(ctx, h)
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if err != nil {
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panic(err)
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}
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th, err := ps.Join(topic)
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if err != nil {
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return fmt.Errorf("failed to join topic: %w", err)
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}
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sub, err := th.Subscribe()
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if err != nil {
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return fmt.Errorf("failed to subscribe topic: %w", err)
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}
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// Add our own bootstrap nodes
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// Count number of successful connection attempts. If we fail to connect to every bootstrap peer, kill
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// the service and have supervisor retry it.
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successes := 0
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// Are we a bootstrap node? If so, it's okay to not have any peers.
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bootstrap_node := false
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for _, addr := range strings.Split(*p2pBootstrap, ",") {
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if addr == "" {
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continue
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}
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ma, err := multiaddr.NewMultiaddr(addr)
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if err != nil {
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logger.Error("Invalid bootstrap address", zap.String("peer", addr), zap.Error(err))
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continue
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}
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pi, err := peer.AddrInfoFromP2pAddr(ma)
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if err != nil {
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logger.Error("Invalid bootstrap address", zap.String("peer", addr), zap.Error(err))
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continue
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}
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if pi.ID == h.ID() {
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logger.Info("We're a bootstrap node")
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bootstrap_node = true
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continue
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}
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if err = h.Connect(ctx, *pi); err != nil {
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logger.Error("Failed to connect to bootstrap peer", zap.String("peer", addr), zap.Error(err))
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} else {
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successes += 1
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}
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}
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// TODO: continually reconnect to bootstrap nodes?
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if successes == 0 && !bootstrap_node {
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return fmt.Errorf("Failed to connect to any bootstrap peer")
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} else {
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logger.Info("Connected to bootstrap peers", zap.Int("num", successes))
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}
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logger.Info("Node has been started", zap.String("peer_id", h.ID().String()),
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zap.String("addrs", fmt.Sprintf("%v", h.Addrs())))
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go func() {
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ctr := int64(0)
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tick := time.NewTicker(15 * time.Second)
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defer tick.Stop()
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for {
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select {
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case <-ctx.Done():
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return
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case <-tick.C:
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msg := gossipv1.GossipMessage{Message: &gossipv1.GossipMessage_Heartbeat{
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Heartbeat: &gossipv1.Heartbeat{
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NodeName: *nodeName,
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Counter: ctr,
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Timestamp: time.Now().UnixNano(),
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}}}
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b, err := proto.Marshal(&msg)
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if err != nil {
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panic(err)
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}
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err = th.Publish(ctx, b)
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if err != nil {
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logger.Warn("failed to publish heartbeat message", zap.Error(err))
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}
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}
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}
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}()
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go func() {
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for {
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select {
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case <-ctx.Done():
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return
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case msg := <-sendC:
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err := th.Publish(ctx, msg)
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if err != nil {
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logger.Error("failed to publish message from queue", zap.Error(err))
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}
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}
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}
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}()
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for {
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envl, err := sub.Next(ctx)
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if err != nil {
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return fmt.Errorf("failed to receive pubsub message: %w", err)
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}
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var msg gossipv1.GossipMessage
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err = proto.Unmarshal(envl.Data, &msg)
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if err != nil {
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logger.Info("received invalid message",
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zap.String("data", string(envl.Data)),
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zap.String("from", envl.GetFrom().String()))
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continue
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}
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if envl.GetFrom() == h.ID() {
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logger.Debug("received message from ourselves, ignoring",
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zap.Any("payload", msg.Message))
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continue
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}
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logger.Debug("received message",
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zap.Any("payload", msg.Message),
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zap.Binary("raw", envl.Data),
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zap.String("from", envl.GetFrom().String()))
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switch m := msg.Message.(type) {
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case *gossipv1.GossipMessage_Heartbeat:
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logger.Info("heartbeat received",
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zap.Any("value", m.Heartbeat),
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zap.String("from", envl.GetFrom().String()))
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case *gossipv1.GossipMessage_LockupObservation:
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obsvC <- m.LockupObservation
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default:
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logger.Warn("received unknown message type (running outdated software?)",
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zap.Any("payload", msg.Message),
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zap.Binary("raw", envl.Data),
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zap.String("from", envl.GetFrom().String()))
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}
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}
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}
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}
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