lnd.xprv/discovery/gossiper_test.go

840 lines
21 KiB
Go

package discovery
import (
"encoding/hex"
"fmt"
"net"
"sync"
prand "math/rand"
"testing"
"math/big"
"time"
"io/ioutil"
"os"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/routing"
"github.com/roasbeef/btcd/btcec"
"github.com/roasbeef/btcd/chaincfg/chainhash"
"github.com/roasbeef/btcd/wire"
)
var (
testAddr = &net.TCPAddr{IP: (net.IP)([]byte{0xA, 0x0, 0x0, 0x1}),
Port: 9000}
testAddrs = []net.Addr{testAddr}
testFeatures = lnwire.NewRawFeatureVector()
testSig = &btcec.Signature{
R: new(big.Int),
S: new(big.Int),
}
_, _ = testSig.R.SetString("63724406601629180062774974542967536251589935445068131219452686511677818569431", 10)
_, _ = testSig.S.SetString("18801056069249825825291287104931333862866033135609736119018462340006816851118", 10)
inputStr = "147caa76786596590baa4e98f5d9f48b86c7765e489f7a6ff3360fe5c674360b"
sha, _ = chainhash.NewHashFromStr(inputStr)
outpoint = wire.NewOutPoint(sha, 0)
bitcoinKeyPriv1, _ = btcec.NewPrivateKey(btcec.S256())
bitcoinKeyPub1 = bitcoinKeyPriv1.PubKey()
nodeKeyPriv1, _ = btcec.NewPrivateKey(btcec.S256())
nodeKeyPub1 = nodeKeyPriv1.PubKey()
bitcoinKeyPriv2, _ = btcec.NewPrivateKey(btcec.S256())
bitcoinKeyPub2 = bitcoinKeyPriv2.PubKey()
nodeKeyPriv2, _ = btcec.NewPrivateKey(btcec.S256())
nodeKeyPub2 = nodeKeyPriv2.PubKey()
trickleDelay = time.Millisecond * 100
retransmitDelay = time.Hour * 1
proofMatureDelta uint32
)
// makeTestDB creates a new instance of the ChannelDB for testing purposes. A
// callback which cleans up the created temporary directories is also returned
// and intended to be executed after the test completes.
func makeTestDB() (*channeldb.DB, func(), error) {
// First, create a temporary directory to be used for the duration of
// this test.
tempDirName, err := ioutil.TempDir("", "channeldb")
if err != nil {
return nil, nil, err
}
// Next, create channeldb for the first time.
cdb, err := channeldb.Open(tempDirName)
if err != nil {
return nil, nil, err
}
cleanUp := func() {
cdb.Close()
os.RemoveAll(tempDirName)
}
return cdb, cleanUp, nil
}
type mockSigner struct {
privKey *btcec.PrivateKey
}
func (n *mockSigner) SignMessage(pubKey *btcec.PublicKey,
msg []byte) (*btcec.Signature, error) {
if !pubKey.IsEqual(n.privKey.PubKey()) {
return nil, fmt.Errorf("unknown public key")
}
digest := chainhash.DoubleHashB(msg)
sign, err := n.privKey.Sign(digest)
if err != nil {
return nil, fmt.Errorf("can't sign the message: %v", err)
}
return sign, nil
}
type mockGraphSource struct {
nodes []*channeldb.LightningNode
infos map[uint64]*channeldb.ChannelEdgeInfo
edges map[uint64][]*channeldb.ChannelEdgePolicy
bestHeight uint32
}
func newMockRouter(height uint32) *mockGraphSource {
return &mockGraphSource{
bestHeight: height,
infos: make(map[uint64]*channeldb.ChannelEdgeInfo),
edges: make(map[uint64][]*channeldb.ChannelEdgePolicy),
}
}
var _ routing.ChannelGraphSource = (*mockGraphSource)(nil)
func (r *mockGraphSource) AddNode(node *channeldb.LightningNode) error {
r.nodes = append(r.nodes, node)
return nil
}
func (r *mockGraphSource) AddEdge(info *channeldb.ChannelEdgeInfo) error {
if _, ok := r.infos[info.ChannelID]; ok {
return errors.New("info already exist")
}
r.infos[info.ChannelID] = info
return nil
}
func (r *mockGraphSource) UpdateEdge(edge *channeldb.ChannelEdgePolicy) error {
r.edges[edge.ChannelID] = append(
r.edges[edge.ChannelID],
edge,
)
return nil
}
func (r *mockGraphSource) SelfEdges() ([]*channeldb.ChannelEdgePolicy, error) {
return nil, nil
}
func (r *mockGraphSource) CurrentBlockHeight() (uint32, error) {
return r.bestHeight, nil
}
func (r *mockGraphSource) AddProof(chanID lnwire.ShortChannelID,
proof *channeldb.ChannelAuthProof) error {
return nil
}
func (r *mockGraphSource) ForEachNode(func(node *channeldb.LightningNode) error) error {
return nil
}
func (r *mockGraphSource) ForAllOutgoingChannels(cb func(i *channeldb.ChannelEdgeInfo,
c *channeldb.ChannelEdgePolicy) error) error {
return nil
}
func (r *mockGraphSource) ForEachChannel(func(chanInfo *channeldb.ChannelEdgeInfo,
e1, e2 *channeldb.ChannelEdgePolicy) error) error {
return nil
}
func (r *mockGraphSource) GetChannelByID(chanID lnwire.ShortChannelID) (
*channeldb.ChannelEdgeInfo,
*channeldb.ChannelEdgePolicy,
*channeldb.ChannelEdgePolicy, error) {
chanInfo, ok := r.infos[chanID.ToUint64()]
if !ok {
return nil, nil, nil, errors.New("can't find channel info")
}
edges := r.edges[chanID.ToUint64()]
if len(edges) == 0 {
return chanInfo, nil, nil, nil
}
if len(edges) == 1 {
return chanInfo, edges[0], nil, nil
}
return chanInfo, edges[0], edges[1], nil
}
type mockNotifier struct {
clientCounter uint32
epochClients map[uint32]chan *chainntnfs.BlockEpoch
sync.RWMutex
}
func newMockNotifier() *mockNotifier {
return &mockNotifier{
epochClients: make(map[uint32]chan *chainntnfs.BlockEpoch),
}
}
func (m *mockNotifier) RegisterConfirmationsNtfn(txid *chainhash.Hash,
numConfs, _ uint32) (*chainntnfs.ConfirmationEvent, error) {
return nil, nil
}
func (m *mockNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint, _ uint32) (*chainntnfs.SpendEvent, error) {
return nil, nil
}
func (m *mockNotifier) notifyBlock(hash chainhash.Hash, height uint32) {
m.RLock()
defer m.RUnlock()
for _, client := range m.epochClients {
client <- &chainntnfs.BlockEpoch{
Height: int32(height),
Hash: &hash,
}
}
}
func (m *mockNotifier) RegisterBlockEpochNtfn() (*chainntnfs.BlockEpochEvent, error) {
m.RLock()
defer m.RUnlock()
epochChan := make(chan *chainntnfs.BlockEpoch)
clientID := m.clientCounter
m.clientCounter++
m.epochClients[clientID] = epochChan
return &chainntnfs.BlockEpochEvent{
Epochs: epochChan,
Cancel: func() {},
}, nil
}
func (m *mockNotifier) Start() error {
return nil
}
func (m *mockNotifier) Stop() error {
return nil
}
type annBatch struct {
nodeAnn1 *lnwire.NodeAnnouncement
nodeAnn2 *lnwire.NodeAnnouncement
localChanAnn *lnwire.ChannelAnnouncement
remoteChanAnn *lnwire.ChannelAnnouncement
chanUpdAnn *lnwire.ChannelUpdate
localProofAnn *lnwire.AnnounceSignatures
remoteProofAnn *lnwire.AnnounceSignatures
}
func createAnnouncements(blockHeight uint32) (*annBatch, error) {
var err error
var batch annBatch
batch.nodeAnn1, err = createNodeAnnouncement(nodeKeyPriv1)
if err != nil {
return nil, err
}
batch.nodeAnn2, err = createNodeAnnouncement(nodeKeyPriv2)
if err != nil {
return nil, err
}
batch.remoteChanAnn, err = createRemoteChannelAnnouncement(blockHeight)
if err != nil {
return nil, err
}
batch.localProofAnn = &lnwire.AnnounceSignatures{
NodeSignature: batch.remoteChanAnn.NodeSig1,
BitcoinSignature: batch.remoteChanAnn.BitcoinSig1,
}
batch.remoteProofAnn = &lnwire.AnnounceSignatures{
NodeSignature: batch.remoteChanAnn.NodeSig2,
BitcoinSignature: batch.remoteChanAnn.BitcoinSig2,
}
batch.localChanAnn, err = createRemoteChannelAnnouncement(blockHeight)
if err != nil {
return nil, err
}
batch.localChanAnn.BitcoinSig1 = nil
batch.localChanAnn.BitcoinSig2 = nil
batch.localChanAnn.NodeSig1 = nil
batch.localChanAnn.NodeSig2 = nil
batch.chanUpdAnn, err = createUpdateAnnouncement(blockHeight)
if err != nil {
return nil, err
}
batch.localChanAnn.BitcoinSig1 = nil
batch.localChanAnn.BitcoinSig2 = nil
batch.localChanAnn.NodeSig1 = nil
batch.localChanAnn.NodeSig2 = nil
return &batch, nil
}
func createNodeAnnouncement(priv *btcec.PrivateKey) (*lnwire.NodeAnnouncement,
error) {
var err error
k := hex.EncodeToString(priv.Serialize())
alias, err := lnwire.NewNodeAlias("kek" + k[:10])
if err != nil {
return nil, err
}
a := &lnwire.NodeAnnouncement{
Timestamp: uint32(prand.Int31()),
Addresses: testAddrs,
NodeID: priv.PubKey(),
Alias: alias,
Features: testFeatures,
}
signer := mockSigner{priv}
if a.Signature, err = SignAnnouncement(&signer, priv.PubKey(), a); err != nil {
return nil, err
}
return a, nil
}
func createUpdateAnnouncement(blockHeight uint32) (*lnwire.ChannelUpdate, error) {
var err error
a := &lnwire.ChannelUpdate{
ShortChannelID: lnwire.ShortChannelID{
BlockHeight: blockHeight,
},
Timestamp: uint32(prand.Int31()),
TimeLockDelta: uint16(prand.Int63()),
HtlcMinimumMsat: lnwire.MilliSatoshi(prand.Int63()),
FeeRate: uint32(prand.Int31()),
BaseFee: uint32(prand.Int31()),
}
pub := nodeKeyPriv1.PubKey()
signer := mockSigner{nodeKeyPriv1}
if a.Signature, err = SignAnnouncement(&signer, pub, a); err != nil {
return nil, err
}
return a, nil
}
func createRemoteChannelAnnouncement(blockHeight uint32) (*lnwire.ChannelAnnouncement,
error) {
var err error
a := &lnwire.ChannelAnnouncement{
ShortChannelID: lnwire.ShortChannelID{
BlockHeight: blockHeight,
TxIndex: 0,
TxPosition: 0,
},
NodeID1: nodeKeyPub1,
NodeID2: nodeKeyPub2,
BitcoinKey1: bitcoinKeyPub1,
BitcoinKey2: bitcoinKeyPub2,
Features: testFeatures,
}
pub := nodeKeyPriv1.PubKey()
signer := mockSigner{nodeKeyPriv1}
if a.NodeSig1, err = SignAnnouncement(&signer, pub, a); err != nil {
return nil, err
}
pub = nodeKeyPriv2.PubKey()
signer = mockSigner{nodeKeyPriv2}
if a.NodeSig2, err = SignAnnouncement(&signer, pub, a); err != nil {
return nil, err
}
pub = bitcoinKeyPriv1.PubKey()
signer = mockSigner{bitcoinKeyPriv1}
if a.BitcoinSig1, err = SignAnnouncement(&signer, pub, a); err != nil {
return nil, err
}
pub = bitcoinKeyPriv2.PubKey()
signer = mockSigner{bitcoinKeyPriv2}
if a.BitcoinSig2, err = SignAnnouncement(&signer, pub, a); err != nil {
return nil, err
}
return a, nil
}
type testCtx struct {
gossiper *AuthenticatedGossiper
router *mockGraphSource
notifier *mockNotifier
broadcastedMessage chan lnwire.Message
}
func createTestCtx(startHeight uint32) (*testCtx, func(), error) {
// Next we'll initialize an instance of the channel router with mock
// versions of the chain and channel notifier. As we don't need to test
// any p2p functionality, the peer send and switch send,
// broadcast functions won't be populated.
notifier := newMockNotifier()
router := newMockRouter(startHeight)
db, cleanUpDb, err := makeTestDB()
if err != nil {
return nil, nil, err
}
broadcastedMessage := make(chan lnwire.Message, 10)
gossiper, err := New(Config{
Notifier: notifier,
Broadcast: func(_ *btcec.PublicKey, msgs ...lnwire.Message) error {
for _, msg := range msgs {
broadcastedMessage <- msg
}
return nil
},
SendToPeer: func(target *btcec.PublicKey, msg ...lnwire.Message) error {
return nil
},
Router: router,
TrickleDelay: trickleDelay,
RetransmitDelay: retransmitDelay,
ProofMatureDelta: proofMatureDelta,
DB: db,
}, nodeKeyPub1)
if err != nil {
cleanUpDb()
return nil, nil, fmt.Errorf("unable to create router %v", err)
}
if err := gossiper.Start(); err != nil {
cleanUpDb()
return nil, nil, fmt.Errorf("unable to start router: %v", err)
}
cleanUp := func() {
gossiper.Stop()
cleanUpDb()
}
return &testCtx{
router: router,
notifier: notifier,
gossiper: gossiper,
broadcastedMessage: broadcastedMessage,
}, cleanUp, nil
}
// TestProcessAnnouncement checks that mature announcements are propagated to
// the router subsystem.
func TestProcessAnnouncement(t *testing.T) {
t.Parallel()
ctx, cleanup, err := createTestCtx(0)
if err != nil {
t.Fatalf("can't create context: %v", err)
}
defer cleanup()
// Create node valid, signed announcement, process it with with
// gossiper service, check that valid announcement have been
// propagated farther into the lightning network, and check that we
// added new node into router.
na, err := createNodeAnnouncement(nodeKeyPriv1)
if err != nil {
t.Fatalf("can't create node announcement: %v", err)
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(na, na.NodeID)
if err != nil {
t.Fatalf("can't process remote announcement: %v", err)
}
select {
case <-ctx.broadcastedMessage:
case <-time.After(2 * trickleDelay):
t.Fatal("announcememt wasn't proceeded")
}
if len(ctx.router.nodes) != 1 {
t.Fatalf("node wasn't added to router: %v", err)
}
// Pretending that we receive the valid channel announcement from
// remote side, and check that we broadcasted it to the our network,
// and added channel info in the router.
ca, err := createRemoteChannelAnnouncement(0)
if err != nil {
t.Fatalf("can't create channel announcement: %v", err)
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(ca, na.NodeID)
if err != nil {
t.Fatalf("can't process remote announcement: %v", err)
}
select {
case <-ctx.broadcastedMessage:
case <-time.After(2 * trickleDelay):
t.Fatal("announcememt wasn't proceeded")
}
if len(ctx.router.infos) != 1 {
t.Fatalf("edge wasn't added to router: %v", err)
}
// Pretending that we received valid channel policy update from remote
// side, and check that we broadcasted it to the other network, and
// added updates to the router.
ua, err := createUpdateAnnouncement(0)
if err != nil {
t.Fatalf("can't create update announcement: %v", err)
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(ua, na.NodeID)
if err != nil {
t.Fatalf("can't process remote announcement: %v", err)
}
select {
case <-ctx.broadcastedMessage:
case <-time.After(2 * trickleDelay):
t.Fatal("announcememt wasn't proceeded")
}
if len(ctx.router.edges) != 1 {
t.Fatalf("edge update wasn't added to router: %v", err)
}
}
// TestPrematureAnnouncement checks that premature announcements are
// not propagated to the router subsystem until block with according
// block height received.
func TestPrematureAnnouncement(t *testing.T) {
t.Parallel()
ctx, cleanup, err := createTestCtx(0)
if err != nil {
t.Fatalf("can't create context: %v", err)
}
defer cleanup()
na, err := createNodeAnnouncement(nodeKeyPriv1)
if err != nil {
t.Fatalf("can't create node announcement: %v", err)
}
// Pretending that we receive the valid channel announcement from
// remote side, but block height of this announcement is greater than
// highest know to us, for that reason it should be added to the
// repeat/premature batch.
ca, err := createRemoteChannelAnnouncement(1)
if err != nil {
t.Fatalf("can't create channel announcement: %v", err)
}
select {
case <-ctx.gossiper.ProcessRemoteAnnouncement(ca, na.NodeID):
t.Fatal("announcement was proceeded")
case <-time.After(100 * time.Millisecond):
}
if len(ctx.router.infos) != 0 {
t.Fatal("edge was added to router")
}
// Pretending that we receive the valid channel update announcement from
// remote side, but block height of this announcement is greater than
// highest know to us, for that reason it should be added to the
// repeat/premature batch.
ua, err := createUpdateAnnouncement(1)
if err != nil {
t.Fatalf("can't create update announcement: %v", err)
}
select {
case <-ctx.gossiper.ProcessRemoteAnnouncement(ua, na.NodeID):
t.Fatal("announcement was proceeded")
case <-time.After(100 * time.Millisecond):
}
if len(ctx.router.edges) != 0 {
t.Fatal("edge update was added to router")
}
// Generate new block and waiting the previously added announcements
// to be proceeded.
newBlock := &wire.MsgBlock{}
ctx.notifier.notifyBlock(newBlock.Header.BlockHash(), 1)
select {
case <-ctx.broadcastedMessage:
case <-time.After(2 * trickleDelay):
t.Fatal("announcememt wasn't broadcasted")
}
if len(ctx.router.infos) != 1 {
t.Fatalf("edge was't added to router: %v", err)
}
select {
case <-ctx.broadcastedMessage:
case <-time.After(2 * trickleDelay):
t.Fatal("announcememt wasn't broadcasted")
}
if len(ctx.router.edges) != 1 {
t.Fatalf("edge update wasn't added to router: %v", err)
}
}
// TestSignatureAnnouncementLocalFirst ensures that the AuthenticatedGossiper properly
// processes partial and fully announcement signatures message.
func TestSignatureAnnouncementLocalFirst(t *testing.T) {
t.Parallel()
ctx, cleanup, err := createTestCtx(uint32(proofMatureDelta))
if err != nil {
t.Fatalf("can't create context: %v", err)
}
defer cleanup()
batch, err := createAnnouncements(0)
if err != nil {
t.Fatalf("can't generate announcements: %v", err)
}
localKey := batch.nodeAnn1.NodeID
remoteKey := batch.nodeAnn2.NodeID
// Recreate lightning network topology. Initialize router with channel
// between two nodes.
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.localChanAnn, localKey)
if err != nil {
t.Fatalf("unable to process :%v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.chanUpdAnn, localKey)
if err != nil {
t.Fatalf("unable to process :%v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel update announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(batch.chanUpdAnn, remoteKey)
if err != nil {
t.Fatalf("unable to process :%v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel update announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
// Pretending that we receive local channel announcement from funding
// manager, thereby kick off the announcement exchange process.
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.localProofAnn, localKey)
if err != nil {
t.Fatalf("unable to process :%v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("announcements were broadcast")
case <-time.After(2 * trickleDelay):
}
number := 0
if err := ctx.gossiper.waitingProofs.ForAll(
func(*channeldb.WaitingProof) error {
number++
return nil
},
); err != nil {
t.Fatalf("unable to retrieve objects from store: %v", err)
}
if number != 1 {
t.Fatal("wrong number of objects in storage")
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(batch.remoteProofAnn, remoteKey)
if err != nil {
t.Fatalf("unable to process :%v", err)
}
for i := 0; i < 3; i++ {
select {
case <-ctx.broadcastedMessage:
case <-time.After(time.Second):
t.Fatal("announcement wasn't broadcast")
}
}
number = 0
if err := ctx.gossiper.waitingProofs.ForAll(
func(*channeldb.WaitingProof) error {
number++
return nil
},
); err != nil && err != channeldb.ErrWaitingProofNotFound {
t.Fatalf("unable to retrieve objects from store: %v", err)
}
if number != 0 {
t.Fatal("waiting proof should be removed from storage")
}
}
// TestOrphanSignatureAnnouncement ensures that the gossiper properly
// processes announcement with unknown channel ids.
func TestOrphanSignatureAnnouncement(t *testing.T) {
t.Parallel()
ctx, cleanup, err := createTestCtx(uint32(proofMatureDelta))
if err != nil {
t.Fatalf("can't create context: %v", err)
}
defer cleanup()
batch, err := createAnnouncements(0)
if err != nil {
t.Fatalf("can't generate announcements: %v", err)
}
localKey := batch.nodeAnn1.NodeID
remoteKey := batch.nodeAnn2.NodeID
// Pretending that we receive local channel announcement from funding
// manager, thereby kick off the announcement exchange process, in
// this case the announcement should be added in the orphan batch
// because we haven't announce the channel yet.
err = <-ctx.gossiper.ProcessRemoteAnnouncement(batch.remoteProofAnn, remoteKey)
if err != nil {
t.Fatalf("unable to proceed announcement: %v", err)
}
number := 0
if err := ctx.gossiper.waitingProofs.ForAll(
func(*channeldb.WaitingProof) error {
number++
return nil
},
); err != nil {
t.Fatalf("unable to retrieve objects from store: %v", err)
}
if number != 1 {
t.Fatal("wrong number of objects in storage")
}
// Recreate lightning network topology. Initialize router with channel
// between two nodes.
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.localChanAnn, localKey)
if err != nil {
t.Fatalf("unable to process: %v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.chanUpdAnn, localKey)
if err != nil {
t.Fatalf("unable to process: %v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel update announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
err = <-ctx.gossiper.ProcessRemoteAnnouncement(batch.chanUpdAnn, remoteKey)
if err != nil {
t.Fatalf("unable to process: %v", err)
}
select {
case <-ctx.broadcastedMessage:
t.Fatal("channel update announcement was broadcast")
case <-time.After(2 * trickleDelay):
}
// After that we process local announcement, and waiting to receive
// the channel announcement.
err = <-ctx.gossiper.ProcessLocalAnnouncement(batch.localProofAnn, localKey)
if err != nil {
t.Fatalf("unable to process: %v", err)
}
for i := 0; i < 3; i++ {
select {
case <-ctx.broadcastedMessage:
case <-time.After(time.Second):
t.Fatal("announcement wasn't broadcast")
}
}
number = 0
if err := ctx.gossiper.waitingProofs.ForAll(
func(*channeldb.WaitingProof) error {
number++
return nil
},
); err != nil {
t.Fatalf("unable to retrieve objects from store: %v", err)
}
if number != 0 {
t.Fatal("wrong number of objects in storage")
}
}