lnd.xprv/htlcswitch/test_utils.go
2018-03-10 19:09:18 -08:00

1082 lines
30 KiB
Go

package htlcswitch
import (
"bytes"
"crypto/rand"
"crypto/sha256"
"encoding/binary"
"fmt"
"io/ioutil"
"math/big"
"net"
"os"
"sync/atomic"
"testing"
"time"
"github.com/btcsuite/fastsha256"
"github.com/coreos/bbolt"
"github.com/go-errors/errors"
"github.com/lightningnetwork/lightning-onion"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/contractcourt"
"github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/lightningnetwork/lnd/shachain"
"github.com/roasbeef/btcd/btcec"
"github.com/roasbeef/btcd/chaincfg/chainhash"
"github.com/roasbeef/btcd/wire"
"github.com/roasbeef/btcutil"
)
var (
alicePrivKey = []byte("alice priv key")
bobPrivKey = []byte("bob priv key")
carolPrivKey = []byte("carol priv key")
testPrivKey = []byte{
0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
}
_, testPubKey = btcec.PrivKeyFromBytes(btcec.S256(), testPrivKey)
testSig = &btcec.Signature{
R: new(big.Int),
S: new(big.Int),
}
wireSig, _ = lnwire.NewSigFromSignature(testSig)
_, _ = testSig.R.SetString("6372440660162918006277497454296753625158993"+
"5445068131219452686511677818569431", 10)
_, _ = testSig.S.SetString("1880105606924982582529128710493133386286603"+
"3135609736119018462340006816851118", 10)
)
var idSeqNum uint64
func genIDs() (lnwire.ChannelID, lnwire.ChannelID, lnwire.ShortChannelID,
lnwire.ShortChannelID) {
id := atomic.AddUint64(&idSeqNum, 2)
var scratch [8]byte
binary.BigEndian.PutUint64(scratch[:], id)
hash1, _ := chainhash.NewHash(bytes.Repeat(scratch[:], 4))
binary.BigEndian.PutUint64(scratch[:], id+1)
hash2, _ := chainhash.NewHash(bytes.Repeat(scratch[:], 4))
chanPoint1 := wire.NewOutPoint(hash1, uint32(id))
chanPoint2 := wire.NewOutPoint(hash2, uint32(id+1))
chanID1 := lnwire.NewChanIDFromOutPoint(chanPoint1)
chanID2 := lnwire.NewChanIDFromOutPoint(chanPoint2)
aliceChanID := lnwire.NewShortChanIDFromInt(id)
bobChanID := lnwire.NewShortChanIDFromInt(id + 1)
return chanID1, chanID2, aliceChanID, bobChanID
}
// mockGetChanUpdateMessage helper function which returns topology update
// of the channel
func mockGetChanUpdateMessage() (*lnwire.ChannelUpdate, error) {
return &lnwire.ChannelUpdate{
Signature: wireSig,
}, nil
}
// generateRandomBytes returns securely generated random bytes.
// It will return an error if the system's secure random
// number generator fails to function correctly, in which
// case the caller should not continue.
func generateRandomBytes(n int) ([]byte, error) {
b := make([]byte, n)
// TODO(roasbeef): should use counter in tests (atomic) rather than
// this
_, err := rand.Read(b[:])
// Note that Err == nil only if we read len(b) bytes.
if err != nil {
return nil, err
}
return b, nil
}
// createTestChannel creates the channel and returns our and remote channels
// representations.
//
// TODO(roasbeef): need to factor out, similar func re-used in many parts of codebase
func createTestChannel(alicePrivKey, bobPrivKey []byte,
aliceAmount, bobAmount, aliceReserve, bobReserve btcutil.Amount,
chanID lnwire.ShortChannelID) (*lnwallet.LightningChannel, *lnwallet.LightningChannel, func(),
func() (*lnwallet.LightningChannel, *lnwallet.LightningChannel,
error), error) {
aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(btcec.S256(), alicePrivKey)
bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(btcec.S256(), bobPrivKey)
channelCapacity := aliceAmount + bobAmount
csvTimeoutAlice := uint32(5)
csvTimeoutBob := uint32(4)
aliceConstraints := &channeldb.ChannelConstraints{
DustLimit: btcutil.Amount(200),
MaxPendingAmount: lnwire.NewMSatFromSatoshis(
channelCapacity),
ChanReserve: aliceReserve,
MinHTLC: 0,
MaxAcceptedHtlcs: lnwallet.MaxHTLCNumber / 2,
}
bobConstraints := &channeldb.ChannelConstraints{
DustLimit: btcutil.Amount(800),
MaxPendingAmount: lnwire.NewMSatFromSatoshis(
channelCapacity),
ChanReserve: bobReserve,
MinHTLC: 0,
MaxAcceptedHtlcs: lnwallet.MaxHTLCNumber / 2,
}
var hash [sha256.Size]byte
randomSeed, err := generateRandomBytes(sha256.Size)
if err != nil {
return nil, nil, nil, nil, err
}
copy(hash[:], randomSeed)
prevOut := &wire.OutPoint{
Hash: chainhash.Hash(hash),
Index: 0,
}
fundingTxIn := wire.NewTxIn(prevOut, nil, nil)
aliceCfg := channeldb.ChannelConfig{
ChannelConstraints: *aliceConstraints,
CsvDelay: uint16(csvTimeoutAlice),
MultiSigKey: keychain.KeyDescriptor{
PubKey: aliceKeyPub,
},
RevocationBasePoint: keychain.KeyDescriptor{
PubKey: aliceKeyPub,
},
PaymentBasePoint: keychain.KeyDescriptor{
PubKey: aliceKeyPub,
},
DelayBasePoint: keychain.KeyDescriptor{
PubKey: aliceKeyPub,
},
HtlcBasePoint: keychain.KeyDescriptor{
PubKey: aliceKeyPub,
},
}
bobCfg := channeldb.ChannelConfig{
ChannelConstraints: *bobConstraints,
CsvDelay: uint16(csvTimeoutBob),
MultiSigKey: keychain.KeyDescriptor{
PubKey: bobKeyPub,
},
RevocationBasePoint: keychain.KeyDescriptor{
PubKey: bobKeyPub,
},
PaymentBasePoint: keychain.KeyDescriptor{
PubKey: bobKeyPub,
},
DelayBasePoint: keychain.KeyDescriptor{
PubKey: bobKeyPub,
},
HtlcBasePoint: keychain.KeyDescriptor{
PubKey: bobKeyPub,
},
}
bobRoot, err := chainhash.NewHash(bobKeyPriv.Serialize())
if err != nil {
return nil, nil, nil, nil, err
}
bobPreimageProducer := shachain.NewRevocationProducer(*bobRoot)
bobFirstRevoke, err := bobPreimageProducer.AtIndex(0)
if err != nil {
return nil, nil, nil, nil, err
}
bobCommitPoint := lnwallet.ComputeCommitmentPoint(bobFirstRevoke[:])
aliceRoot, err := chainhash.NewHash(aliceKeyPriv.Serialize())
if err != nil {
return nil, nil, nil, nil, err
}
alicePreimageProducer := shachain.NewRevocationProducer(*aliceRoot)
aliceFirstRevoke, err := alicePreimageProducer.AtIndex(0)
if err != nil {
return nil, nil, nil, nil, err
}
aliceCommitPoint := lnwallet.ComputeCommitmentPoint(aliceFirstRevoke[:])
aliceCommitTx, bobCommitTx, err := lnwallet.CreateCommitmentTxns(aliceAmount,
bobAmount, &aliceCfg, &bobCfg, aliceCommitPoint, bobCommitPoint,
*fundingTxIn)
if err != nil {
return nil, nil, nil, nil, err
}
alicePath, err := ioutil.TempDir("", "alicedb")
dbAlice, err := channeldb.Open(alicePath)
if err != nil {
return nil, nil, nil, nil, err
}
bobPath, err := ioutil.TempDir("", "bobdb")
dbBob, err := channeldb.Open(bobPath)
if err != nil {
return nil, nil, nil, nil, err
}
estimator := &lnwallet.StaticFeeEstimator{
FeeRate: 24,
}
feePerVSize, err := estimator.EstimateFeePerVSize(1)
if err != nil {
return nil, nil, nil, nil, err
}
feePerKw := feePerVSize.FeePerKWeight()
commitFee := feePerKw.FeeForWeight(724)
const broadcastHeight = 1
bobAddr := &net.TCPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: 18555,
}
aliceAddr := &net.TCPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: 18556,
}
aliceCommit := channeldb.ChannelCommitment{
CommitHeight: 0,
LocalBalance: lnwire.NewMSatFromSatoshis(aliceAmount - commitFee),
RemoteBalance: lnwire.NewMSatFromSatoshis(bobAmount),
CommitFee: commitFee,
FeePerKw: btcutil.Amount(feePerKw),
CommitTx: aliceCommitTx,
CommitSig: bytes.Repeat([]byte{1}, 71),
}
bobCommit := channeldb.ChannelCommitment{
CommitHeight: 0,
LocalBalance: lnwire.NewMSatFromSatoshis(bobAmount),
RemoteBalance: lnwire.NewMSatFromSatoshis(aliceAmount - commitFee),
CommitFee: commitFee,
FeePerKw: btcutil.Amount(feePerKw),
CommitTx: bobCommitTx,
CommitSig: bytes.Repeat([]byte{1}, 71),
}
aliceChannelState := &channeldb.OpenChannel{
LocalChanCfg: aliceCfg,
RemoteChanCfg: bobCfg,
IdentityPub: aliceKeyPub,
FundingOutpoint: *prevOut,
ChanType: channeldb.SingleFunder,
IsInitiator: true,
Capacity: channelCapacity,
RemoteCurrentRevocation: bobCommitPoint,
RevocationProducer: alicePreimageProducer,
RevocationStore: shachain.NewRevocationStore(),
LocalCommitment: aliceCommit,
RemoteCommitment: aliceCommit,
ShortChanID: chanID,
Db: dbAlice,
Packager: channeldb.NewChannelPackager(chanID),
}
bobChannelState := &channeldb.OpenChannel{
LocalChanCfg: bobCfg,
RemoteChanCfg: aliceCfg,
IdentityPub: bobKeyPub,
FundingOutpoint: *prevOut,
ChanType: channeldb.SingleFunder,
IsInitiator: false,
Capacity: channelCapacity,
RemoteCurrentRevocation: aliceCommitPoint,
RevocationProducer: bobPreimageProducer,
RevocationStore: shachain.NewRevocationStore(),
LocalCommitment: bobCommit,
RemoteCommitment: bobCommit,
ShortChanID: chanID,
Db: dbBob,
Packager: channeldb.NewChannelPackager(chanID),
}
if err := aliceChannelState.SyncPending(bobAddr, broadcastHeight); err != nil {
return nil, nil, nil, nil, err
}
if err := bobChannelState.SyncPending(aliceAddr, broadcastHeight); err != nil {
return nil, nil, nil, nil, err
}
cleanUpFunc := func() {
dbAlice.Close()
dbBob.Close()
os.RemoveAll(bobPath)
os.RemoveAll(alicePath)
}
aliceSigner := &mockSigner{aliceKeyPriv}
bobSigner := &mockSigner{bobKeyPriv}
pCache := &mockPreimageCache{
// hash -> preimage
preimageMap: make(map[[32]byte][]byte),
}
channelAlice, err := lnwallet.NewLightningChannel(
aliceSigner, pCache, aliceChannelState,
)
if err != nil {
return nil, nil, nil, nil, err
}
channelBob, err := lnwallet.NewLightningChannel(
bobSigner, pCache, bobChannelState,
)
if err != nil {
return nil, nil, nil, nil, err
}
// Now that the channel are open, simulate the start of a session by
// having Alice and Bob extend their revocation windows to each other.
aliceNextRevoke, err := channelAlice.NextRevocationKey()
if err != nil {
return nil, nil, nil, nil, err
}
if err := channelBob.InitNextRevocation(aliceNextRevoke); err != nil {
return nil, nil, nil, nil, err
}
bobNextRevoke, err := channelBob.NextRevocationKey()
if err != nil {
return nil, nil, nil, nil, err
}
if err := channelAlice.InitNextRevocation(bobNextRevoke); err != nil {
return nil, nil, nil, nil, err
}
restore := func() (*lnwallet.LightningChannel, *lnwallet.LightningChannel,
error) {
aliceStoredChannels, err := dbAlice.FetchOpenChannels(aliceKeyPub)
switch err {
case nil:
case bolt.ErrDatabaseNotOpen:
dbAlice, err = channeldb.Open(dbAlice.Path())
if err != nil {
return nil, nil, errors.Errorf("unable to reopen alice "+
"db: %v", err)
}
aliceStoredChannels, err = dbAlice.FetchOpenChannels(aliceKeyPub)
if err != nil {
return nil, nil, errors.Errorf("unable to fetch alice "+
"channel: %v", err)
}
default:
return nil, nil, errors.Errorf("unable to fetch alice channel: "+
"%v", err)
}
var aliceStoredChannel *channeldb.OpenChannel
for _, channel := range aliceStoredChannels {
if channel.FundingOutpoint.String() == prevOut.String() {
aliceStoredChannel = channel
break
}
}
if aliceStoredChannel == nil {
return nil, nil, errors.New("unable to find stored alice channel")
}
newAliceChannel, err := lnwallet.NewLightningChannel(aliceSigner,
nil, aliceStoredChannel)
if err != nil {
return nil, nil, errors.Errorf("unable to create new channel: %v",
err)
}
bobStoredChannels, err := dbBob.FetchOpenChannels(bobKeyPub)
switch err {
case nil:
case bolt.ErrDatabaseNotOpen:
dbBob, err = channeldb.Open(dbBob.Path())
if err != nil {
return nil, nil, errors.Errorf("unable to reopen bob "+
"db: %v", err)
}
bobStoredChannels, err = dbBob.FetchOpenChannels(bobKeyPub)
if err != nil {
return nil, nil, errors.Errorf("unable to fetch bob "+
"channel: %v", err)
}
default:
return nil, nil, errors.Errorf("unable to fetch bob channel: "+
"%v", err)
}
var bobStoredChannel *channeldb.OpenChannel
for _, channel := range bobStoredChannels {
if channel.FundingOutpoint.String() == prevOut.String() {
bobStoredChannel = channel
break
}
}
if bobStoredChannel == nil {
return nil, nil, errors.New("unable to find stored bob channel")
}
newBobChannel, err := lnwallet.NewLightningChannel(bobSigner,
nil, bobStoredChannel)
if err != nil {
return nil, nil, errors.Errorf("unable to create new channel: %v",
err)
}
return newAliceChannel, newBobChannel, nil
}
return channelAlice, channelBob, cleanUpFunc, restore, nil
}
// getChanID retrieves the channel point from nwire message.
func getChanID(msg lnwire.Message) (lnwire.ChannelID, error) {
var chanID lnwire.ChannelID
switch msg := msg.(type) {
case *lnwire.UpdateAddHTLC:
chanID = msg.ChanID
case *lnwire.UpdateFulfillHTLC:
chanID = msg.ChanID
case *lnwire.UpdateFailHTLC:
chanID = msg.ChanID
case *lnwire.RevokeAndAck:
chanID = msg.ChanID
case *lnwire.CommitSig:
chanID = msg.ChanID
case *lnwire.ChannelReestablish:
chanID = msg.ChanID
case *lnwire.FundingLocked:
chanID = msg.ChanID
case *lnwire.UpdateFee:
chanID = msg.ChanID
default:
return chanID, fmt.Errorf("unknown type: %T", msg)
}
return chanID, nil
}
// generatePayment generates the htlc add request by given path blob and
// invoice which should be added by destination peer.
func generatePayment(invoiceAmt, htlcAmt lnwire.MilliSatoshi, timelock uint32,
blob [lnwire.OnionPacketSize]byte) (*channeldb.Invoice, *lnwire.UpdateAddHTLC, error) {
var preimage [sha256.Size]byte
r, err := generateRandomBytes(sha256.Size)
if err != nil {
return nil, nil, err
}
copy(preimage[:], r)
rhash := fastsha256.Sum256(preimage[:])
invoice := &channeldb.Invoice{
CreationDate: time.Now(),
Terms: channeldb.ContractTerm{
Value: invoiceAmt,
PaymentPreimage: preimage,
},
}
htlc := &lnwire.UpdateAddHTLC{
PaymentHash: rhash,
Amount: htlcAmt,
Expiry: timelock,
OnionBlob: blob,
}
return invoice, htlc, nil
}
// generateRoute generates the path blob by given array of peers.
func generateRoute(hops ...ForwardingInfo) ([lnwire.OnionPacketSize]byte, error) {
var blob [lnwire.OnionPacketSize]byte
if len(hops) == 0 {
return blob, errors.New("empty path")
}
iterator := newMockHopIterator(hops...)
w := bytes.NewBuffer(blob[0:0])
if err := iterator.EncodeNextHop(w); err != nil {
return blob, err
}
return blob, nil
}
// threeHopNetwork is used for managing the created cluster of 3 hops.
type threeHopNetwork struct {
aliceServer *mockServer
aliceChannelLink *channelLink
aliceBlockEpoch chan *chainntnfs.BlockEpoch
aliceTicker *time.Ticker
firstBobChannelLink *channelLink
bobFirstBlockEpoch chan *chainntnfs.BlockEpoch
firstBobTicker *time.Ticker
bobServer *mockServer
secondBobChannelLink *channelLink
bobSecondBlockEpoch chan *chainntnfs.BlockEpoch
secondBobTicker *time.Ticker
carolChannelLink *channelLink
carolServer *mockServer
carolBlockEpoch chan *chainntnfs.BlockEpoch
carolTicker *time.Ticker
feeEstimator *mockFeeEstimator
globalPolicy ForwardingPolicy
}
// generateHops creates the per hop payload, the total amount to be sent, and
// also the time lock value needed to route a HTLC with the target amount over
// the specified path.
func generateHops(payAmt lnwire.MilliSatoshi, startingHeight uint32,
path ...*channelLink) (lnwire.MilliSatoshi, uint32, []ForwardingInfo) {
lastHop := path[len(path)-1]
totalTimelock := startingHeight
runningAmt := payAmt
hops := make([]ForwardingInfo, len(path))
for i := len(path) - 1; i >= 0; i-- {
// If this is the last hop, then the next hop is the special
// "exit node". Otherwise, we look to the "prior" hop.
nextHop := exitHop
if i != len(path)-1 {
nextHop = path[i+1].channel.ShortChanID()
}
// If this is the last, hop, then the time lock will be their
// specified delta policy plus our starting height.
totalTimelock += lastHop.cfg.FwrdingPolicy.TimeLockDelta
timeLock := totalTimelock
// Otherwise, the outgoing time lock should be the incoming
// timelock minus their specified delta.
if i != len(path)-1 {
delta := path[i].cfg.FwrdingPolicy.TimeLockDelta
timeLock = totalTimelock - delta
}
// Finally, we'll need to calculate the amount to forward. For
// the last hop, it's just the payment amount.
amount := payAmt
if i != len(path)-1 {
prevHop := hops[i+1]
prevAmount := prevHop.AmountToForward
fee := ExpectedFee(path[i].cfg.FwrdingPolicy, prevAmount)
runningAmt += fee
// Otherwise, for a node to forward an HTLC, then
// following inequality most hold true:
// * amt_in - fee >= amt_to_forward
amount = runningAmt - fee
}
hops[i] = ForwardingInfo{
Network: BitcoinHop,
NextHop: nextHop,
AmountToForward: amount,
OutgoingCTLV: timeLock,
}
}
return runningAmt, totalTimelock, hops
}
type paymentResponse struct {
rhash chainhash.Hash
err chan error
}
func (r *paymentResponse) Wait(d time.Duration) (chainhash.Hash, error) {
select {
case err := <-r.err:
close(r.err)
return r.rhash, err
case <-time.After(d):
return r.rhash, errors.New("htlc was no settled in time")
}
}
// makePayment takes the destination node and amount as input, sends the
// payment and returns the error channel to wait for error to be received and
// invoice in order to check its status after the payment finished.
//
// With this function you can send payments:
// * from Alice to Bob
// * from Alice to Carol through the Bob
// * from Alice to some another peer through the Bob
func (n *threeHopNetwork) makePayment(sendingPeer, receivingPeer Peer,
firstHopPub [33]byte, hops []ForwardingInfo,
invoiceAmt, htlcAmt lnwire.MilliSatoshi,
timelock uint32) *paymentResponse {
paymentErr := make(chan error, 1)
var rhash chainhash.Hash
sender := sendingPeer.(*mockServer)
receiver := receivingPeer.(*mockServer)
// Generate route convert it to blob, and return next destination for
// htlc add request.
blob, err := generateRoute(hops...)
if err != nil {
paymentErr <- err
return &paymentResponse{
rhash: rhash,
err: paymentErr,
}
}
// Generate payment: invoice and htlc.
invoice, htlc, err := generatePayment(invoiceAmt, htlcAmt, timelock, blob)
if err != nil {
paymentErr <- err
return &paymentResponse{
rhash: rhash,
err: paymentErr,
}
}
rhash = fastsha256.Sum256(invoice.Terms.PaymentPreimage[:])
// Check who is last in the route and add invoice to server registry.
if err := receiver.registry.AddInvoice(*invoice); err != nil {
paymentErr <- err
return &paymentResponse{
rhash: rhash,
err: paymentErr,
}
}
// Send payment and expose err channel.
go func() {
_, err := sender.htlcSwitch.SendHTLC(firstHopPub, htlc,
newMockDeobfuscator())
paymentErr <- err
}()
return &paymentResponse{
rhash: rhash,
err: paymentErr,
}
}
// start starts the three hop network alice,bob,carol servers.
func (n *threeHopNetwork) start() error {
if err := n.aliceServer.Start(); err != nil {
return err
}
if err := n.bobServer.Start(); err != nil {
return err
}
if err := n.carolServer.Start(); err != nil {
return err
}
return nil
}
// stop stops nodes and cleanup its databases.
func (n *threeHopNetwork) stop() {
done := make(chan struct{})
go func() {
n.aliceServer.Stop()
done <- struct{}{}
}()
go func() {
n.bobServer.Stop()
done <- struct{}{}
}()
go func() {
n.carolServer.Stop()
done <- struct{}{}
}()
n.aliceTicker.Stop()
n.firstBobTicker.Stop()
n.secondBobTicker.Stop()
n.carolTicker.Stop()
for i := 0; i < 3; i++ {
<-done
}
}
type clusterChannels struct {
aliceToBob *lnwallet.LightningChannel
bobToAlice *lnwallet.LightningChannel
bobToCarol *lnwallet.LightningChannel
carolToBob *lnwallet.LightningChannel
}
// createClusterChannels creates lightning channels which are needed for
// network cluster to be initialized.
func createClusterChannels(aliceToBob, bobToCarol btcutil.Amount) (
*clusterChannels, func(), func() (*clusterChannels, error), error) {
_, _, firstChanID, secondChanID := genIDs()
// Create lightning channels between Alice<->Bob and Bob<->Carol
aliceChannel, firstBobChannel, cleanAliceBob, restoreAliceBob, err :=
createTestChannel(alicePrivKey, bobPrivKey, aliceToBob,
aliceToBob, 0, 0, firstChanID)
if err != nil {
return nil, nil, nil, errors.Errorf("unable to create "+
"alice<->bob channel: %v", err)
}
secondBobChannel, carolChannel, cleanBobCarol, restoreBobCarol, err :=
createTestChannel(bobPrivKey, carolPrivKey, bobToCarol,
bobToCarol, 0, 0, secondChanID)
if err != nil {
cleanAliceBob()
return nil, nil, nil, errors.Errorf("unable to create "+
"bob<->carol channel: %v", err)
}
cleanUp := func() {
cleanAliceBob()
cleanBobCarol()
}
restoreFromDb := func() (*clusterChannels, error) {
a2b, b2a, err := restoreAliceBob()
if err != nil {
return nil, err
}
b2c, c2b, err := restoreBobCarol()
if err != nil {
return nil, err
}
return &clusterChannels{
aliceToBob: a2b,
bobToAlice: b2a,
bobToCarol: b2c,
carolToBob: c2b,
}, nil
}
return &clusterChannels{
aliceToBob: aliceChannel,
bobToAlice: firstBobChannel,
bobToCarol: secondBobChannel,
carolToBob: carolChannel,
}, cleanUp, restoreFromDb, nil
}
// newThreeHopNetwork function creates the following topology and returns the
// control object to manage this cluster:
//
// alice bob carol
// server - <-connection-> - server - - <-connection-> - - - server
// | | |
// alice htlc bob htlc carol htlc
// switch switch \ switch
// | | \ |
// | | \ |
// alice first bob second bob carol
// channel link channel link channel link channel link
//
func newThreeHopNetwork(t testing.TB, aliceChannel, firstBobChannel,
secondBobChannel, carolChannel *lnwallet.LightningChannel,
startingHeight uint32) *threeHopNetwork {
aliceDb := aliceChannel.State().Db
bobDb := firstBobChannel.State().Db
carolDb := carolChannel.State().Db
// Create three peers/servers.
aliceServer, err := newMockServer(t, "alice", aliceDb)
if err != nil {
t.Fatalf("unable to create alice server: %v", err)
}
bobServer, err := newMockServer(t, "bob", bobDb)
if err != nil {
t.Fatalf("unable to create bob server: %v", err)
}
carolServer, err := newMockServer(t, "carol", carolDb)
if err != nil {
t.Fatalf("unable to create carol server: %v", err)
}
// Create mock decoder instead of sphinx one in order to mock the route
// which htlc should follow.
aliceDecoder := newMockIteratorDecoder()
bobDecoder := newMockIteratorDecoder()
carolDecoder := newMockIteratorDecoder()
feeEstimator := &mockFeeEstimator{
byteFeeIn: make(chan lnwallet.SatPerVByte),
quit: make(chan struct{}),
}
pCache := &mockPreimageCache{
// hash -> preimage
preimageMap: make(map[[32]byte][]byte),
}
globalPolicy := ForwardingPolicy{
MinHTLC: lnwire.NewMSatFromSatoshis(5),
BaseFee: lnwire.NewMSatFromSatoshis(1),
TimeLockDelta: 6,
}
obfuscator := NewMockObfuscator()
aliceEpochChan := make(chan *chainntnfs.BlockEpoch)
aliceEpoch := &chainntnfs.BlockEpochEvent{
Epochs: aliceEpochChan,
Cancel: func() {
},
}
aliceTicker := time.NewTicker(50 * time.Millisecond)
aliceChannelLink := NewChannelLink(
ChannelLinkConfig{
FwrdingPolicy: globalPolicy,
Peer: bobServer,
Circuits: aliceServer.htlcSwitch.CircuitModifier(),
ForwardPackets: aliceServer.htlcSwitch.ForwardPackets,
DecodeHopIterator: aliceDecoder.DecodeHopIterator,
DecodeHopIterators: aliceDecoder.DecodeHopIterators,
DecodeOnionObfuscator: func(*sphinx.OnionPacket) (
ErrorEncrypter, lnwire.FailCode) {
return obfuscator, lnwire.CodeNone
},
GetLastChannelUpdate: mockGetChanUpdateMessage,
Registry: aliceServer.registry,
BlockEpochs: aliceEpoch,
FeeEstimator: feeEstimator,
PreimageCache: pCache,
UpdateContractSignals: func(*contractcourt.ContractSignals) error {
return nil
},
ChainEvents: &contractcourt.ChainEventSubscription{},
SyncStates: true,
BatchTicker: &mockTicker{aliceTicker.C},
FwdPkgGCTicker: &mockTicker{time.NewTicker(5 * time.Second).C},
BatchSize: 10,
},
aliceChannel,
startingHeight,
)
if err := aliceServer.htlcSwitch.addLink(aliceChannelLink); err != nil {
t.Fatalf("unable to add alice channel link: %v", err)
}
go func() {
for {
select {
case <-aliceChannelLink.(*channelLink).htlcUpdates:
case <-aliceChannelLink.(*channelLink).quit:
return
}
}
}()
bobFirstEpochChan := make(chan *chainntnfs.BlockEpoch)
bobFirstEpoch := &chainntnfs.BlockEpochEvent{
Epochs: bobFirstEpochChan,
Cancel: func() {
},
}
firstBobTicker := time.NewTicker(50 * time.Millisecond)
firstBobChannelLink := NewChannelLink(
ChannelLinkConfig{
FwrdingPolicy: globalPolicy,
Peer: aliceServer,
Circuits: bobServer.htlcSwitch.CircuitModifier(),
ForwardPackets: bobServer.htlcSwitch.ForwardPackets,
DecodeHopIterator: bobDecoder.DecodeHopIterator,
DecodeHopIterators: bobDecoder.DecodeHopIterators,
DecodeOnionObfuscator: func(*sphinx.OnionPacket) (
ErrorEncrypter, lnwire.FailCode) {
return obfuscator, lnwire.CodeNone
},
GetLastChannelUpdate: mockGetChanUpdateMessage,
Registry: bobServer.registry,
BlockEpochs: bobFirstEpoch,
FeeEstimator: feeEstimator,
PreimageCache: pCache,
UpdateContractSignals: func(*contractcourt.ContractSignals) error {
return nil
},
ChainEvents: &contractcourt.ChainEventSubscription{},
SyncStates: true,
BatchTicker: &mockTicker{firstBobTicker.C},
FwdPkgGCTicker: &mockTicker{time.NewTicker(5 * time.Second).C},
BatchSize: 10,
},
firstBobChannel,
startingHeight,
)
if err := bobServer.htlcSwitch.addLink(firstBobChannelLink); err != nil {
t.Fatalf("unable to add first bob channel link: %v", err)
}
go func() {
for {
select {
case <-firstBobChannelLink.(*channelLink).htlcUpdates:
case <-firstBobChannelLink.(*channelLink).quit:
return
}
}
}()
bobSecondEpochChan := make(chan *chainntnfs.BlockEpoch)
bobSecondEpoch := &chainntnfs.BlockEpochEvent{
Epochs: bobSecondEpochChan,
Cancel: func() {
},
}
secondBobTicker := time.NewTicker(50 * time.Millisecond)
secondBobChannelLink := NewChannelLink(
ChannelLinkConfig{
FwrdingPolicy: globalPolicy,
Peer: carolServer,
Circuits: bobServer.htlcSwitch.CircuitModifier(),
ForwardPackets: bobServer.htlcSwitch.ForwardPackets,
DecodeHopIterator: bobDecoder.DecodeHopIterator,
DecodeHopIterators: bobDecoder.DecodeHopIterators,
DecodeOnionObfuscator: func(*sphinx.OnionPacket) (
ErrorEncrypter, lnwire.FailCode) {
return obfuscator, lnwire.CodeNone
},
GetLastChannelUpdate: mockGetChanUpdateMessage,
Registry: bobServer.registry,
BlockEpochs: bobSecondEpoch,
FeeEstimator: feeEstimator,
PreimageCache: pCache,
UpdateContractSignals: func(*contractcourt.ContractSignals) error {
return nil
},
ChainEvents: &contractcourt.ChainEventSubscription{},
SyncStates: true,
BatchTicker: &mockTicker{secondBobTicker.C},
FwdPkgGCTicker: &mockTicker{time.NewTicker(5 * time.Second).C},
BatchSize: 10,
},
secondBobChannel,
startingHeight,
)
if err := bobServer.htlcSwitch.addLink(secondBobChannelLink); err != nil {
t.Fatalf("unable to add second bob channel link: %v", err)
}
go func() {
for {
select {
case <-secondBobChannelLink.(*channelLink).htlcUpdates:
case <-secondBobChannelLink.(*channelLink).quit:
return
}
}
}()
carolBlockEpoch := make(chan *chainntnfs.BlockEpoch)
carolEpoch := &chainntnfs.BlockEpochEvent{
Epochs: bobSecondEpochChan,
Cancel: func() {
},
}
carolTicker := time.NewTicker(50 * time.Millisecond)
carolChannelLink := NewChannelLink(
ChannelLinkConfig{
FwrdingPolicy: globalPolicy,
Peer: bobServer,
Circuits: carolServer.htlcSwitch.CircuitModifier(),
ForwardPackets: carolServer.htlcSwitch.ForwardPackets,
DecodeHopIterator: carolDecoder.DecodeHopIterator,
DecodeHopIterators: carolDecoder.DecodeHopIterators,
DecodeOnionObfuscator: func(*sphinx.OnionPacket) (
ErrorEncrypter, lnwire.FailCode) {
return obfuscator, lnwire.CodeNone
},
GetLastChannelUpdate: mockGetChanUpdateMessage,
Registry: carolServer.registry,
BlockEpochs: carolEpoch,
FeeEstimator: feeEstimator,
PreimageCache: pCache,
UpdateContractSignals: func(*contractcourt.ContractSignals) error {
return nil
},
ChainEvents: &contractcourt.ChainEventSubscription{},
SyncStates: true,
BatchTicker: &mockTicker{carolTicker.C},
FwdPkgGCTicker: &mockTicker{time.NewTicker(5 * time.Second).C},
BatchSize: 10,
},
carolChannel,
startingHeight,
)
if err := carolServer.htlcSwitch.addLink(carolChannelLink); err != nil {
t.Fatalf("unable to add carol channel link: %v", err)
}
go func() {
for {
select {
case <-carolChannelLink.(*channelLink).htlcUpdates:
case <-carolChannelLink.(*channelLink).quit:
return
}
}
}()
return &threeHopNetwork{
aliceServer: aliceServer,
aliceChannelLink: aliceChannelLink.(*channelLink),
aliceBlockEpoch: aliceEpochChan,
aliceTicker: aliceTicker,
firstBobChannelLink: firstBobChannelLink.(*channelLink),
bobFirstBlockEpoch: bobFirstEpochChan,
firstBobTicker: firstBobTicker,
bobServer: bobServer,
secondBobChannelLink: secondBobChannelLink.(*channelLink),
bobSecondBlockEpoch: bobSecondEpochChan,
secondBobTicker: secondBobTicker,
carolChannelLink: carolChannelLink.(*channelLink),
carolServer: carolServer,
carolBlockEpoch: carolBlockEpoch,
carolTicker: carolTicker,
feeEstimator: feeEstimator,
globalPolicy: globalPolicy,
}
}