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server.go
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server.go
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package lnd
import (
"bytes"
"context"
"crypto/rand"
"encoding/hex"
"fmt"
"image/color"
"math/big"
prand "math/rand"
"net"
"regexp"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/brronsuite/brond/btcec"
"github.com/brronsuite/brond/chaincfg/chainhash"
"github.com/brronsuite/brond/connmgr"
"github.com/brronsuite/brond/txscript"
"github.com/brronsuite/brond/wire"
"github.com/brronsuite/lnd/autopilot"
"github.com/brronsuite/lnd/brontide"
"github.com/brronsuite/lnd/cert"
"github.com/brronsuite/lnd/chainreg"
"github.com/brronsuite/lnd/chanacceptor"
"github.com/brronsuite/lnd/chanbackup"
"github.com/brronsuite/lnd/chanfitness"
"github.com/brronsuite/lnd/channeldb"
"github.com/brronsuite/lnd/channelnotifier"
"github.com/brronsuite/lnd/clock"
"github.com/brronsuite/lnd/contractcourt"
"github.com/brronsuite/lnd/discovery"
"github.com/brronsuite/lnd/feature"
"github.com/brronsuite/lnd/funding"
"github.com/brronsuite/lnd/healthcheck"
"github.com/brronsuite/lnd/htlcswitch"
"github.com/brronsuite/lnd/htlcswitch/hop"
"github.com/brronsuite/lnd/input"
"github.com/brronsuite/lnd/invoices"
"github.com/brronsuite/lnd/keychain"
"github.com/brronsuite/lnd/kvdb"
"github.com/brronsuite/lnd/lncfg"
"github.com/brronsuite/lnd/lnpeer"
"github.com/brronsuite/lnd/lnrpc"
"github.com/brronsuite/lnd/lnrpc/routerrpc"
"github.com/brronsuite/lnd/lnwallet"
"github.com/brronsuite/lnd/lnwallet/chainfee"
"github.com/brronsuite/lnd/lnwallet/rpcwallet"
"github.com/brronsuite/lnd/lnwire"
"github.com/brronsuite/lnd/nat"
"github.com/brronsuite/lnd/netann"
"github.com/brronsuite/lnd/peer"
"github.com/brronsuite/lnd/peernotifier"
"github.com/brronsuite/lnd/pool"
"github.com/brronsuite/lnd/queue"
"github.com/brronsuite/lnd/routing"
"github.com/brronsuite/lnd/routing/localchans"
"github.com/brronsuite/lnd/routing/route"
"github.com/brronsuite/lnd/subscribe"
"github.com/brronsuite/lnd/sweep"
"github.com/brronsuite/lnd/ticker"
"github.com/brronsuite/lnd/tor"
"github.com/brronsuite/lnd/walletunlocker"
"github.com/brronsuite/lnd/watchtower/blob"
"github.com/brronsuite/lnd/watchtower/wtclient"
"github.com/brronsuite/lnd/watchtower/wtpolicy"
"github.com/brronsuite/lnd/watchtower/wtserver"
"github.com/btcsuite/btcutil"
"github.com/go-errors/errors"
sphinx "github.com/lightningnetwork/lightning-onion"
)
const (
// defaultMinPeers is the minimum number of peers nodes should always be
// connected to.
defaultMinPeers = 3
// defaultStableConnDuration is a floor under which all reconnection
// attempts will apply exponential randomized backoff. Connections
// durations exceeding this value will be eligible to have their
// backoffs reduced.
defaultStableConnDuration = 10 * time.Minute
// numInstantInitReconnect specifies how many persistent peers we should
// always attempt outbound connections to immediately. After this value
// is surpassed, the remaining peers will be randomly delayed using
// maxInitReconnectDelay.
numInstantInitReconnect = 10
// maxInitReconnectDelay specifies the maximum delay in seconds we will
// apply in attempting to reconnect to persistent peers on startup. The
// value used or a particular peer will be chosen between 0s and this
// value.
maxInitReconnectDelay = 30
// multiAddrConnectionStagger is the number of seconds to wait between
// attempting to a peer with each of its advertised addresses.
multiAddrConnectionStagger = 10 * time.Second
)
var (
// ErrPeerNotConnected signals that the server has no connection to the
// given peer.
ErrPeerNotConnected = errors.New("peer is not connected")
// ErrServerNotActive indicates that the server has started but hasn't
// fully finished the startup process.
ErrServerNotActive = errors.New("server is still in the process of " +
"starting")
// ErrServerShuttingDown indicates that the server is in the process of
// gracefully exiting.
ErrServerShuttingDown = errors.New("server is shutting down")
// validColorRegexp is a regexp that lets you check if a particular
// color string matches the standard hex color format #RRGGBB.
validColorRegexp = regexp.MustCompile("^#[A-Fa-f0-9]{6}$")
// MaxFundingAmount is a soft-limit of the maximum channel size
// currently accepted within the Lightning Protocol. This is
// defined in BOLT-0002, and serves as an initial precautionary limit
// while implementations are battle tested in the real world.
//
// At the moment, this value depends on which chain is active. It is set
// to the value under the Bitcoin chain as default.
//
// TODO(roasbeef): add command line param to modify
MaxFundingAmount = funding.MaxBtcFundingAmount
)
// errPeerAlreadyConnected is an error returned by the server when we're
// commanded to connect to a peer, but they're already connected.
type errPeerAlreadyConnected struct {
peer *peer.Brontide
}
// Error returns the human readable version of this error type.
//
// NOTE: Part of the error interface.
func (e *errPeerAlreadyConnected) Error() string {
return fmt.Sprintf("already connected to peer: %v", e.peer)
}
// server is the main server of the Lightning Network Daemon. The server houses
// global state pertaining to the wallet, database, and the rpcserver.
// Additionally, the server is also used as a central messaging bus to interact
// with any of its companion objects.
type server struct {
active int32 // atomic
stopping int32 // atomic
start sync.Once
stop sync.Once
cfg *Config
// identityECDH is an ECDH capable wrapper for the private key used
// to authenticate any incoming connections.
identityECDH keychain.SingleKeyECDH
// identityKeyLoc is the key locator for the above wrapped identity key.
identityKeyLoc keychain.KeyLocator
// nodeSigner is an implementation of the MessageSigner implementation
// that's backed by the identity private key of the running lnd node.
nodeSigner *netann.NodeSigner
chanStatusMgr *netann.ChanStatusManager
// listenAddrs is the list of addresses the server is currently
// listening on.
listenAddrs []net.Addr
// torController is a client that will communicate with a locally
// running Tor server. This client will handle initiating and
// authenticating the connection to the Tor server, automatically
// creating and setting up onion services, etc.
torController *tor.Controller
// natTraversal is the specific NAT traversal technique used to
// automatically set up port forwarding rules in order to advertise to
// the network that the node is accepting inbound connections.
natTraversal nat.Traversal
// lastDetectedIP is the last IP detected by the NAT traversal technique
// above. This IP will be watched periodically in a goroutine in order
// to handle dynamic IP changes.
lastDetectedIP net.IP
mu sync.RWMutex
peersByPub map[string]*peer.Brontide
inboundPeers map[string]*peer.Brontide
outboundPeers map[string]*peer.Brontide
peerConnectedListeners map[string][]chan<- lnpeer.Peer
peerDisconnectedListeners map[string][]chan<- struct{}
// TODO(yy): the Brontide.Start doesn't know this value, which means it
// will continue to send messages even if there are no active channels
// and the value below is false. Once it's pruned, all its connections
// will be closed, thus the Brontide.Start will return an error.
persistentPeers map[string]bool
persistentPeersBackoff map[string]time.Duration
persistentPeerAddrs map[string][]*lnwire.NetAddress
persistentConnReqs map[string][]*connmgr.ConnReq
persistentRetryCancels map[string]chan struct{}
// peerErrors keeps a set of peer error buffers for peers that have
// disconnected from us. This allows us to track historic peer errors
// over connections. The string of the peer's compressed pubkey is used
// as a key for this map.
peerErrors map[string]*queue.CircularBuffer
// ignorePeerTermination tracks peers for which the server has initiated
// a disconnect. Adding a peer to this map causes the peer termination
// watcher to short circuit in the event that peers are purposefully
// disconnected.
ignorePeerTermination map[*peer.Brontide]struct{}
// scheduledPeerConnection maps a pubkey string to a callback that
// should be executed in the peerTerminationWatcher the prior peer with
// the same pubkey exits. This allows the server to wait until the
// prior peer has cleaned up successfully, before adding the new peer
// intended to replace it.
scheduledPeerConnection map[string]func()
// pongBuf is a shared pong reply buffer we'll use across all active
// peer goroutines. We know the max size of a pong message
// (lnwire.MaxPongBytes), so we can allocate this ahead of time, and
// avoid allocations each time we need to send a pong message.
pongBuf []byte
cc *chainreg.ChainControl
fundingMgr *funding.Manager
graphDB *channeldb.ChannelGraph
chanStateDB *channeldb.ChannelStateDB
addrSource chanbackup.AddressSource
// miscDB is the DB that contains all "other" databases within the main
// channel DB that haven't been separated out yet.
miscDB *channeldb.DB
htlcSwitch *htlcswitch.Switch
interceptableSwitch *htlcswitch.InterceptableSwitch
invoices *invoices.InvoiceRegistry
channelNotifier *channelnotifier.ChannelNotifier
peerNotifier *peernotifier.PeerNotifier
htlcNotifier *htlcswitch.HtlcNotifier
witnessBeacon contractcourt.WitnessBeacon
breachArbiter *contractcourt.BreachArbiter
missionControl *routing.MissionControl
chanRouter *routing.ChannelRouter
controlTower routing.ControlTower
authGossiper *discovery.AuthenticatedGossiper
localChanMgr *localchans.Manager
utxoNursery *contractcourt.UtxoNursery
sweeper *sweep.UtxoSweeper
chainArb *contractcourt.ChainArbitrator
sphinx *hop.OnionProcessor
towerClient wtclient.Client
anchorTowerClient wtclient.Client
connMgr *connmgr.ConnManager
sigPool *lnwallet.SigPool
writePool *pool.Write
readPool *pool.Read
// featureMgr dispatches feature vectors for various contexts within the
// daemon.
featureMgr *feature.Manager
// currentNodeAnn is the node announcement that has been broadcast to
// the network upon startup, if the attributes of the node (us) has
// changed since last start.
currentNodeAnn *lnwire.NodeAnnouncement
// chansToRestore is the set of channels that upon starting, the server
// should attempt to restore/recover.
chansToRestore walletunlocker.ChannelsToRecover
// chanSubSwapper is a sub-system that will ensure our on-disk channel
// backups are consistent at all times. It interacts with the
// channelNotifier to be notified of newly opened and closed channels.
chanSubSwapper *chanbackup.SubSwapper
// chanEventStore tracks the behaviour of channels and their remote peers to
// provide insights into their health and performance.
chanEventStore *chanfitness.ChannelEventStore
hostAnn *netann.HostAnnouncer
// livelinessMonitor monitors that lnd has access to critical resources.
livelinessMonitor *healthcheck.Monitor
customMessageServer *subscribe.Server
quit chan struct{}
wg sync.WaitGroup
}
// updatePersistentPeerAddrs subscribes to topology changes and stores
// advertised addresses for any NodeAnnouncements from our persisted peers.
func (s *server) updatePersistentPeerAddrs() error {
graphSub, err := s.chanRouter.SubscribeTopology()
if err != nil {
return err
}
s.wg.Add(1)
go func() {
defer func() {
graphSub.Cancel()
s.wg.Done()
}()
for {
select {
case <-s.quit:
return
case topChange, ok := <-graphSub.TopologyChanges:
// If the router is shutting down, then we will
// as well.
if !ok {
return
}
for _, update := range topChange.NodeUpdates {
pubKeyStr := string(
update.IdentityKey.
SerializeCompressed(),
)
// We only care about updates from
// our persistentPeers.
s.mu.RLock()
_, ok := s.persistentPeers[pubKeyStr]
s.mu.RUnlock()
if !ok {
continue
}
addrs := make([]*lnwire.NetAddress, 0,
len(update.Addresses))
for _, addr := range update.Addresses {
addrs = append(addrs,
&lnwire.NetAddress{
IdentityKey: update.IdentityKey,
Address: addr,
ChainNet: s.cfg.ActiveNetParams.Net,
},
)
}
s.mu.Lock()
// Update the stored addresses for this
// to peer to reflect the new set.
s.persistentPeerAddrs[pubKeyStr] = addrs
// If there are no outstanding
// connection requests for this peer
// then our work is done since we are
// not currently trying to connect to
// them.
if len(s.persistentConnReqs[pubKeyStr]) == 0 {
s.mu.Unlock()
continue
}
s.mu.Unlock()
s.connectToPersistentPeer(pubKeyStr)
}
}
}
}()
return nil
}
// CustomMessage is a custom message that is received from a peer.
type CustomMessage struct {
// Peer is the peer pubkey
Peer [33]byte
// Msg is the custom wire message.
Msg *lnwire.Custom
}
// parseAddr parses an address from its string format to a net.Addr.
func parseAddr(address string, netCfg tor.Net) (net.Addr, error) {
var (
host string
port int
)
// Split the address into its host and port components.
h, p, err := net.SplitHostPort(address)
if err != nil {
// If a port wasn't specified, we'll assume the address only
// contains the host so we'll use the default port.
host = address
port = defaultPeerPort
} else {
// Otherwise, we'll note both the host and ports.
host = h
portNum, err := strconv.Atoi(p)
if err != nil {
return nil, err
}
port = portNum
}
if tor.IsOnionHost(host) {
return &tor.OnionAddr{OnionService: host, Port: port}, nil
}
// If the host is part of a TCP address, we'll use the network
// specific ResolveTCPAddr function in order to resolve these
// addresses over Tor in order to prevent leaking your real IP
// address.
hostPort := net.JoinHostPort(host, strconv.Itoa(port))
return netCfg.ResolveTCPAddr("tcp", hostPort)
}
// noiseDial is a factory function which creates a connmgr compliant dialing
// function by returning a closure which includes the server's identity key.
func noiseDial(idKey keychain.SingleKeyECDH,
netCfg tor.Net, timeout time.Duration) func(net.Addr) (net.Conn, error) {
return func(a net.Addr) (net.Conn, error) {
lnAddr := a.(*lnwire.NetAddress)
return brontide.Dial(idKey, lnAddr, timeout, netCfg.Dial)
}
}
// newServer creates a new instance of the server which is to listen using the
// passed listener address.
func newServer(cfg *Config, listenAddrs []net.Addr,
dbs *DatabaseInstances, cc *chainreg.ChainControl,
nodeKeyDesc *keychain.KeyDescriptor,
chansToRestore walletunlocker.ChannelsToRecover,
chanPredicate chanacceptor.ChannelAcceptor,
torController *tor.Controller) (*server, error) {
var (
err error
nodeKeyECDH = keychain.NewPubKeyECDH(*nodeKeyDesc, cc.KeyRing)
// We just derived the full descriptor, so we know the public
// key is set on it.
nodeKeySigner = keychain.NewPubKeyMessageSigner(
nodeKeyDesc.PubKey, nodeKeyDesc.KeyLocator, cc.KeyRing,
)
)
listeners := make([]net.Listener, len(listenAddrs))
for i, listenAddr := range listenAddrs {
// Note: though brontide.NewListener uses ResolveTCPAddr, it
// doesn't need to call the general lndResolveTCP function
// since we are resolving a local address.
listeners[i], err = brontide.NewListener(
nodeKeyECDH, listenAddr.String(),
)
if err != nil {
return nil, err
}
}
var serializedPubKey [33]byte
copy(serializedPubKey[:], nodeKeyDesc.PubKey.SerializeCompressed())
// Initialize the sphinx router.
replayLog := htlcswitch.NewDecayedLog(
dbs.DecayedLogDB, cc.ChainNotifier,
)
sphinxRouter := sphinx.NewRouter(
nodeKeyECDH, cfg.ActiveNetParams.Params, replayLog,
)
writeBufferPool := pool.NewWriteBuffer(
pool.DefaultWriteBufferGCInterval,
pool.DefaultWriteBufferExpiryInterval,
)
writePool := pool.NewWrite(
writeBufferPool, cfg.Workers.Write, pool.DefaultWorkerTimeout,
)
readBufferPool := pool.NewReadBuffer(
pool.DefaultReadBufferGCInterval,
pool.DefaultReadBufferExpiryInterval,
)
readPool := pool.NewRead(
readBufferPool, cfg.Workers.Read, pool.DefaultWorkerTimeout,
)
featureMgr, err := feature.NewManager(feature.Config{
NoTLVOnion: cfg.ProtocolOptions.LegacyOnion(),
NoStaticRemoteKey: cfg.ProtocolOptions.NoStaticRemoteKey(),
NoAnchors: cfg.ProtocolOptions.NoAnchorCommitments(),
NoWumbo: !cfg.ProtocolOptions.Wumbo(),
NoScriptEnforcementLease: cfg.ProtocolOptions.NoScriptEnforcementLease(),
})
if err != nil {
return nil, err
}
registryConfig := invoices.RegistryConfig{
FinalCltvRejectDelta: lncfg.DefaultFinalCltvRejectDelta,
HtlcHoldDuration: invoices.DefaultHtlcHoldDuration,
Clock: clock.NewDefaultClock(),
AcceptKeySend: cfg.AcceptKeySend,
AcceptAMP: cfg.AcceptAMP,
GcCanceledInvoicesOnStartup: cfg.GcCanceledInvoicesOnStartup,
GcCanceledInvoicesOnTheFly: cfg.GcCanceledInvoicesOnTheFly,
KeysendHoldTime: cfg.KeysendHoldTime,
}
s := &server{
cfg: cfg,
graphDB: dbs.GraphDB.ChannelGraph(),
chanStateDB: dbs.ChanStateDB.ChannelStateDB(),
addrSource: dbs.ChanStateDB,
miscDB: dbs.ChanStateDB,
cc: cc,
sigPool: lnwallet.NewSigPool(cfg.Workers.Sig, cc.Signer),
writePool: writePool,
readPool: readPool,
chansToRestore: chansToRestore,
channelNotifier: channelnotifier.New(
dbs.ChanStateDB.ChannelStateDB(),
),
identityECDH: nodeKeyECDH,
identityKeyLoc: nodeKeyDesc.KeyLocator,
nodeSigner: netann.NewNodeSigner(nodeKeySigner),
listenAddrs: listenAddrs,
// TODO(roasbeef): derive proper onion key based on rotation
// schedule
sphinx: hop.NewOnionProcessor(sphinxRouter),
torController: torController,
persistentPeers: make(map[string]bool),
persistentPeersBackoff: make(map[string]time.Duration),
persistentConnReqs: make(map[string][]*connmgr.ConnReq),
persistentPeerAddrs: make(map[string][]*lnwire.NetAddress),
persistentRetryCancels: make(map[string]chan struct{}),
peerErrors: make(map[string]*queue.CircularBuffer),
ignorePeerTermination: make(map[*peer.Brontide]struct{}),
scheduledPeerConnection: make(map[string]func()),
pongBuf: make([]byte, lnwire.MaxPongBytes),
peersByPub: make(map[string]*peer.Brontide),
inboundPeers: make(map[string]*peer.Brontide),
outboundPeers: make(map[string]*peer.Brontide),
peerConnectedListeners: make(map[string][]chan<- lnpeer.Peer),
peerDisconnectedListeners: make(map[string][]chan<- struct{}),
customMessageServer: subscribe.NewServer(),
featureMgr: featureMgr,
quit: make(chan struct{}),
}
s.witnessBeacon = &preimageBeacon{
wCache: dbs.ChanStateDB.NewWitnessCache(),
subscribers: make(map[uint64]*preimageSubscriber),
}
currentHash, currentHeight, err := s.cc.ChainIO.GetBestBlock()
if err != nil {
return nil, err
}
expiryWatcher := invoices.NewInvoiceExpiryWatcher(
clock.NewDefaultClock(), cfg.Invoices.HoldExpiryDelta,
uint32(currentHeight), currentHash, cc.ChainNotifier,
)
s.invoices = invoices.NewRegistry(
dbs.ChanStateDB, expiryWatcher, ®istryConfig,
)
s.htlcNotifier = htlcswitch.NewHtlcNotifier(time.Now)
thresholdSats := btcutil.Amount(cfg.DustThreshold)
thresholdMSats := lnwire.NewMSatFromSatoshis(thresholdSats)
s.htlcSwitch, err = htlcswitch.New(htlcswitch.Config{
DB: dbs.ChanStateDB,
FetchAllOpenChannels: s.chanStateDB.FetchAllOpenChannels,
FetchClosedChannels: s.chanStateDB.FetchClosedChannels,
LocalChannelClose: func(pubKey []byte,
request *htlcswitch.ChanClose) {
peer, err := s.FindPeerByPubStr(string(pubKey))
if err != nil {
srvrLog.Errorf("unable to close channel, peer"+
" with %v id can't be found: %v",
pubKey, err,
)
return
}
peer.HandleLocalCloseChanReqs(request)
},
FwdingLog: dbs.ChanStateDB.ForwardingLog(),
SwitchPackager: channeldb.NewSwitchPackager(),
ExtractErrorEncrypter: s.sphinx.ExtractErrorEncrypter,
FetchLastChannelUpdate: s.fetchLastChanUpdate(),
Notifier: s.cc.ChainNotifier,
HtlcNotifier: s.htlcNotifier,
FwdEventTicker: ticker.New(htlcswitch.DefaultFwdEventInterval),
LogEventTicker: ticker.New(htlcswitch.DefaultLogInterval),
AckEventTicker: ticker.New(htlcswitch.DefaultAckInterval),
AllowCircularRoute: cfg.AllowCircularRoute,
RejectHTLC: cfg.RejectHTLC,
Clock: clock.NewDefaultClock(),
HTLCExpiry: htlcswitch.DefaultHTLCExpiry,
DustThreshold: thresholdMSats,
}, uint32(currentHeight))
if err != nil {
return nil, err
}
s.interceptableSwitch = htlcswitch.NewInterceptableSwitch(s.htlcSwitch)
chanStatusMgrCfg := &netann.ChanStatusConfig{
ChanStatusSampleInterval: cfg.ChanStatusSampleInterval,
ChanEnableTimeout: cfg.ChanEnableTimeout,
ChanDisableTimeout: cfg.ChanDisableTimeout,
OurPubKey: nodeKeyDesc.PubKey,
OurKeyLoc: nodeKeyDesc.KeyLocator,
MessageSigner: s.nodeSigner,
IsChannelActive: s.htlcSwitch.HasActiveLink,
ApplyChannelUpdate: s.applyChannelUpdate,
DB: s.chanStateDB,
Graph: dbs.GraphDB.ChannelGraph(),
}
chanStatusMgr, err := netann.NewChanStatusManager(chanStatusMgrCfg)
if err != nil {
return nil, err
}
s.chanStatusMgr = chanStatusMgr
// If enabled, use either UPnP or NAT-PMP to automatically configure
// port forwarding for users behind a NAT.
if cfg.NAT {
srvrLog.Info("Scanning local network for a UPnP enabled device")
discoveryTimeout := time.Duration(10 * time.Second)
ctx, cancel := context.WithTimeout(
context.Background(), discoveryTimeout,
)
defer cancel()
upnp, err := nat.DiscoverUPnP(ctx)
if err == nil {
s.natTraversal = upnp
} else {
// If we were not able to discover a UPnP enabled device
// on the local network, we'll fall back to attempting
// to discover a NAT-PMP enabled device.
srvrLog.Errorf("Unable to discover a UPnP enabled "+
"device on the local network: %v", err)
srvrLog.Info("Scanning local network for a NAT-PMP " +
"enabled device")
pmp, err := nat.DiscoverPMP(discoveryTimeout)
if err != nil {
err := fmt.Errorf("unable to discover a "+
"NAT-PMP enabled device on the local "+
"network: %v", err)
srvrLog.Error(err)
return nil, err
}
s.natTraversal = pmp
}
}
// If we were requested to automatically configure port forwarding,
// we'll use the ports that the server will be listening on.
externalIPStrings := make([]string, len(cfg.ExternalIPs))
for idx, ip := range cfg.ExternalIPs {
externalIPStrings[idx] = ip.String()
}
if s.natTraversal != nil {
listenPorts := make([]uint16, 0, len(listenAddrs))
for _, listenAddr := range listenAddrs {
// At this point, the listen addresses should have
// already been normalized, so it's safe to ignore the
// errors.
_, portStr, _ := net.SplitHostPort(listenAddr.String())
port, _ := strconv.Atoi(portStr)
listenPorts = append(listenPorts, uint16(port))
}
ips, err := s.configurePortForwarding(listenPorts...)
if err != nil {
srvrLog.Errorf("Unable to automatically set up port "+
"forwarding using %s: %v",
s.natTraversal.Name(), err)
} else {
srvrLog.Infof("Automatically set up port forwarding "+
"using %s to advertise external IP",
s.natTraversal.Name())
externalIPStrings = append(externalIPStrings, ips...)
}
}
// If external IP addresses have been specified, add those to the list
// of this server's addresses.
externalIPs, err := lncfg.NormalizeAddresses(
externalIPStrings, strconv.Itoa(defaultPeerPort),
cfg.net.ResolveTCPAddr,
)
if err != nil {
return nil, err
}
selfAddrs := make([]net.Addr, 0, len(externalIPs))
selfAddrs = append(selfAddrs, externalIPs...)
// As the graph can be obtained at anytime from the network, we won't
// replicate it, and instead it'll only be stored locally.
chanGraph := dbs.GraphDB.ChannelGraph()
// We'll now reconstruct a node announcement based on our current
// configuration so we can send it out as a sort of heart beat within
// the network.
//
// We'll start by parsing the node color from configuration.
color, err := parseHexColor(cfg.Color)
if err != nil {
srvrLog.Errorf("unable to parse color: %v\n", err)
return nil, err
}
// If no alias is provided, default to first 10 characters of public
// key.
alias := cfg.Alias
if alias == "" {
alias = hex.EncodeToString(serializedPubKey[:10])
}
nodeAlias, err := lnwire.NewNodeAlias(alias)
if err != nil {
return nil, err
}
selfNode := &channeldb.LightningNode{
HaveNodeAnnouncement: true,
LastUpdate: time.Now(),
Addresses: selfAddrs,
Alias: nodeAlias.String(),
Features: s.featureMgr.Get(feature.SetNodeAnn),
Color: color,
}
copy(selfNode.PubKeyBytes[:], nodeKeyDesc.PubKey.SerializeCompressed())
// Based on the disk representation of the node announcement generated
// above, we'll generate a node announcement that can go out on the
// network so we can properly sign it.
nodeAnn, err := selfNode.NodeAnnouncement(false)
if err != nil {
return nil, fmt.Errorf("unable to gen self node ann: %v", err)
}
// With the announcement generated, we'll sign it to properly
// authenticate the message on the network.
authSig, err := netann.SignAnnouncement(
s.nodeSigner, nodeKeyDesc.KeyLocator, nodeAnn,
)
if err != nil {
return nil, fmt.Errorf("unable to generate signature for "+
"self node announcement: %v", err)
}
selfNode.AuthSigBytes = authSig.Serialize()
nodeAnn.Signature, err = lnwire.NewSigFromRawSignature(
selfNode.AuthSigBytes,
)
if err != nil {
return nil, err
}
// Finally, we'll update the representation on disk, and update our
// cached in-memory version as well.
if err := chanGraph.SetSourceNode(selfNode); err != nil {
return nil, fmt.Errorf("can't set self node: %v", err)
}
s.currentNodeAnn = nodeAnn
// The router will get access to the payment ID sequencer, such that it
// can generate unique payment IDs.
sequencer, err := htlcswitch.NewPersistentSequencer(dbs.ChanStateDB)
if err != nil {
return nil, err
}
// Instantiate mission control with config from the sub server.
//
// TODO(joostjager): When we are further in the process of moving to sub
// servers, the mission control instance itself can be moved there too.
routingConfig := routerrpc.GetRoutingConfig(cfg.SubRPCServers.RouterRPC)
estimatorCfg := routing.ProbabilityEstimatorCfg{
AprioriHopProbability: routingConfig.AprioriHopProbability,
PenaltyHalfLife: routingConfig.PenaltyHalfLife,
AprioriWeight: routingConfig.AprioriWeight,
}
s.missionControl, err = routing.NewMissionControl(
dbs.ChanStateDB, selfNode.PubKeyBytes,
&routing.MissionControlConfig{
ProbabilityEstimatorCfg: estimatorCfg,
MaxMcHistory: routingConfig.MaxMcHistory,
McFlushInterval: routingConfig.McFlushInterval,
MinFailureRelaxInterval: routing.DefaultMinFailureRelaxInterval,
},
)
if err != nil {
return nil, fmt.Errorf("can't create mission control: %v", err)
}
srvrLog.Debugf("Instantiating payment session source with config: "+
"AttemptCost=%v + %v%%, MinRouteProbability=%v",
int64(routingConfig.AttemptCost),
float64(routingConfig.AttemptCostPPM)/10000,
routingConfig.MinRouteProbability)
pathFindingConfig := routing.PathFindingConfig{
AttemptCost: lnwire.NewMSatFromSatoshis(
routingConfig.AttemptCost,
),
AttemptCostPPM: routingConfig.AttemptCostPPM,
MinProbability: routingConfig.MinRouteProbability,
}
sourceNode, err := chanGraph.SourceNode()
if err != nil {
return nil, fmt.Errorf("error getting source node: %v", err)
}
paymentSessionSource := &routing.SessionSource{
Graph: chanGraph,
SourceNode: sourceNode,
MissionControl: s.missionControl,
GetLink: s.htlcSwitch.GetLinkByShortID,
PathFindingConfig: pathFindingConfig,
}
paymentControl := channeldb.NewPaymentControl(dbs.ChanStateDB)
s.controlTower = routing.NewControlTower(paymentControl)
strictPruning := (cfg.Bitcoin.Node == "neutrino" ||
cfg.Routing.StrictZombiePruning)
s.chanRouter, err = routing.New(routing.Config{
Graph: chanGraph,
Chain: cc.ChainIO,
ChainView: cc.ChainView,
Notifier: cc.ChainNotifier,
Payer: s.htlcSwitch,
Control: s.controlTower,
MissionControl: s.missionControl,
SessionSource: paymentSessionSource,
ChannelPruneExpiry: routing.DefaultChannelPruneExpiry,
GraphPruneInterval: time.Hour,
FirstTimePruneDelay: routing.DefaultFirstTimePruneDelay,
GetLink: s.htlcSwitch.GetLinkByShortID,
AssumeChannelValid: cfg.Routing.AssumeChannelValid,
NextPaymentID: sequencer.NextID,
PathFindingConfig: pathFindingConfig,
Clock: clock.NewDefaultClock(),
StrictZombiePruning: strictPruning,
})
if err != nil {
return nil, fmt.Errorf("can't create router: %v", err)
}
chanSeries := discovery.NewChanSeries(s.graphDB)
gossipMessageStore, err := discovery.NewMessageStore(dbs.ChanStateDB)
if err != nil {
return nil, err
}
waitingProofStore, err := channeldb.NewWaitingProofStore(dbs.ChanStateDB)
if err != nil {
return nil, err
}
s.authGossiper = discovery.New(discovery.Config{
Router: s.chanRouter,
Notifier: s.cc.ChainNotifier,
ChainHash: *s.cfg.ActiveNetParams.GenesisHash,
Broadcast: s.BroadcastMessage,
ChanSeries: chanSeries,
NotifyWhenOnline: s.NotifyWhenOnline,
NotifyWhenOffline: s.NotifyWhenOffline,
SelfNodeAnnouncement: func(refresh bool) (lnwire.NodeAnnouncement, error) {
return s.genNodeAnnouncement(refresh)
},
ProofMatureDelta: 0,
TrickleDelay: time.Millisecond * time.Duration(cfg.TrickleDelay),
RetransmitTicker: ticker.New(time.Minute * 30),
RebroadcastInterval: time.Hour * 24,
WaitingProofStore: waitingProofStore,
MessageStore: gossipMessageStore,
AnnSigner: s.nodeSigner,
RotateTicker: ticker.New(discovery.DefaultSyncerRotationInterval),
HistoricalSyncTicker: ticker.New(cfg.HistoricalSyncInterval),
NumActiveSyncers: cfg.NumGraphSyncPeers,
MinimumBatchSize: 10,
SubBatchDelay: time.Second * 5,
IgnoreHistoricalFilters: cfg.IgnoreHistoricalGossipFilters,
PinnedSyncers: cfg.Gossip.PinnedSyncers,
MaxChannelUpdateBurst: cfg.Gossip.MaxChannelUpdateBurst,
ChannelUpdateInterval: cfg.Gossip.ChannelUpdateInterval,
}, nodeKeyDesc)
s.localChanMgr = &localchans.Manager{
ForAllOutgoingChannels: s.chanRouter.ForAllOutgoingChannels,
PropagateChanPolicyUpdate: s.authGossiper.PropagateChanPolicyUpdate,
UpdateForwardingPolicies: s.htlcSwitch.UpdateForwardingPolicies,
FetchChannel: s.chanStateDB.FetchChannel,
}
utxnStore, err := contractcourt.NewNurseryStore(
s.cfg.ActiveNetParams.GenesisHash, dbs.ChanStateDB,
)
if err != nil {
srvrLog.Errorf("unable to create nursery store: %v", err)
return nil, err
}
srvrLog.Tracef("Sweeper batch window duration: %v",
sweep.DefaultBatchWindowDuration)
sweeperStore, err := sweep.NewSweeperStore(
dbs.ChanStateDB, s.cfg.ActiveNetParams.GenesisHash,
)
if err != nil {
srvrLog.Errorf("unable to create sweeper store: %v", err)
return nil, err
}
s.sweeper = sweep.New(&sweep.UtxoSweeperConfig{
FeeEstimator: cc.FeeEstimator,
GenSweepScript: newSweepPkScriptGen(cc.Wallet),
Signer: cc.Wallet.Cfg.Signer,
Wallet: cc.Wallet,
NewBatchTimer: func() <-chan time.Time {
return time.NewTimer(sweep.DefaultBatchWindowDuration).C
},
Notifier: cc.ChainNotifier,
Store: sweeperStore,
MaxInputsPerTx: sweep.DefaultMaxInputsPerTx,
MaxSweepAttempts: sweep.DefaultMaxSweepAttempts,
NextAttemptDeltaFunc: sweep.DefaultNextAttemptDeltaFunc,
MaxFeeRate: sweep.DefaultMaxFeeRate,
FeeRateBucketSize: sweep.DefaultFeeRateBucketSize,
})