lnd.xprv/peer_test.go

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// +build !rpctest
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package lnd
import (
"testing"
"time"
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"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd/chainntnfs"
"github.com/lightningnetwork/lnd/htlcswitch"
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
"github.com/lightningnetwork/lnd/lnwire"
)
// TestPeerChannelClosureAcceptFeeResponder tests the shutdown responder's
// behavior if we can agree on the fee immediately.
func TestPeerChannelClosureAcceptFeeResponder(t *testing.T) {
t.Parallel()
notifier := &mockNotfier{
confChannel: make(chan *chainntnfs.TxConfirmation),
}
broadcastTxChan := make(chan *wire.MsgTx)
responder, responderChan, initiatorChan, cleanUp, err := createTestPeer(
notifier, broadcastTxChan)
if err != nil {
t.Fatalf("unable to create test channels: %v", err)
}
defer cleanUp()
chanID := lnwire.NewChanIDFromOutPoint(responderChan.ChannelPoint())
// We send a shutdown request to Alice. She will now be the responding
// node in this shutdown procedure. We first expect Alice to answer
// this shutdown request with a Shutdown message.
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: lnwire.NewShutdown(chanID, dummyDeliveryScript),
}
var msg lnwire.Message
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive shutdown message")
}
shutdownMsg, ok := msg.(*lnwire.Shutdown)
if !ok {
t.Fatalf("expected Shutdown message, got %T", msg)
}
respDeliveryScript := shutdownMsg.Address
// Alice will thereafter send a ClosingSigned message, indicating her
// proposed closing transaction fee.
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive ClosingSigned message")
}
responderClosingSigned, ok := msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// We accept the fee, and send a ClosingSigned with the same fee back,
// so she knows we agreed.
peerFee := responderClosingSigned.FeeSatoshis
initiatorSig, _, _, err := initiatorChan.CreateCloseProposal(
peerFee, dummyDeliveryScript, respDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err := lnwire.NewSigFromRawSignature(initiatorSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned := lnwire.NewClosingSigned(chanID, peerFee, parsedSig)
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// The responder will now see that we agreed on the fee, and broadcast
// the closing transaction.
select {
case <-broadcastTxChan:
case <-time.After(time.Second * 5):
t.Fatalf("closing tx not broadcast")
}
// And the initiator should be waiting for a confirmation notification.
notifier.confChannel <- &chainntnfs.TxConfirmation{}
}
// TestPeerChannelClosureAcceptFeeInitiator tests the shutdown initiator's
// behavior if we can agree on the fee immediately.
func TestPeerChannelClosureAcceptFeeInitiator(t *testing.T) {
t.Parallel()
notifier := &mockNotfier{
confChannel: make(chan *chainntnfs.TxConfirmation),
}
broadcastTxChan := make(chan *wire.MsgTx)
initiator, initiatorChan, responderChan, cleanUp, err := createTestPeer(
notifier, broadcastTxChan)
if err != nil {
t.Fatalf("unable to create test channels: %v", err)
}
defer cleanUp()
// We make the initiator send a shutdown request.
updateChan := make(chan interface{}, 1)
errChan := make(chan error, 1)
closeCommand := &htlcswitch.ChanClose{
CloseType: htlcswitch.CloseRegular,
ChanPoint: initiatorChan.ChannelPoint(),
Updates: updateChan,
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TargetFeePerKw: 12500,
Err: errChan,
}
initiator.localCloseChanReqs <- closeCommand
// We should now be getting the shutdown request.
var msg lnwire.Message
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive shutdown request")
}
shutdownMsg, ok := msg.(*lnwire.Shutdown)
if !ok {
t.Fatalf("expected Shutdown message, got %T", msg)
}
initiatorDeliveryScript := shutdownMsg.Address
// We'll answer the shutdown message with our own Shutdown, and then a
// ClosingSigned message.
chanID := shutdownMsg.ChannelID
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: lnwire.NewShutdown(chanID,
dummyDeliveryScript),
}
estimator := chainfee.NewStaticEstimator(12500, 0)
feePerKw, err := estimator.EstimateFeePerKW(1)
if err != nil {
t.Fatalf("unable to query fee estimator: %v", err)
}
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fee := responderChan.CalcFee(feePerKw)
closeSig, _, _, err := responderChan.CreateCloseProposal(fee,
dummyDeliveryScript, initiatorDeliveryScript)
if err != nil {
t.Fatalf("unable to create close proposal: %v", err)
}
parsedSig, err := lnwire.NewSigFromRawSignature(closeSig)
if err != nil {
t.Fatalf("unable to parse signature: %v", err)
}
closingSigned := lnwire.NewClosingSigned(shutdownMsg.ChannelID,
fee, parsedSig)
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// And we expect the initiator to accept the fee, and broadcast the
// closing transaction.
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed message")
}
closingSignedMsg, ok := msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
if closingSignedMsg.FeeSatoshis != fee {
t.Fatalf("expected ClosingSigned fee to be %v, instead got %v",
fee, closingSignedMsg.FeeSatoshis)
}
// The initiator will now see that we agreed on the fee, and broadcast
// the closing transaction.
select {
case <-broadcastTxChan:
case <-time.After(time.Second * 5):
t.Fatalf("closing tx not broadcast")
}
// And the initiator should be waiting for a confirmation notification.
notifier.confChannel <- &chainntnfs.TxConfirmation{}
}
// TestPeerChannelClosureFeeNegotiationsResponder tests the shutdown
// responder's behavior in the case where we must do several rounds of fee
// negotiation before we agree on a fee.
func TestPeerChannelClosureFeeNegotiationsResponder(t *testing.T) {
t.Parallel()
notifier := &mockNotfier{
confChannel: make(chan *chainntnfs.TxConfirmation),
}
broadcastTxChan := make(chan *wire.MsgTx)
responder, responderChan, initiatorChan, cleanUp, err := createTestPeer(
notifier, broadcastTxChan,
)
if err != nil {
t.Fatalf("unable to create test channels: %v", err)
}
defer cleanUp()
chanID := lnwire.NewChanIDFromOutPoint(responderChan.ChannelPoint())
// We send a shutdown request to Alice. She will now be the responding
// node in this shutdown procedure. We first expect Alice to answer
// this shutdown request with a Shutdown message.
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: lnwire.NewShutdown(chanID,
dummyDeliveryScript),
}
var msg lnwire.Message
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive shutdown message")
}
shutdownMsg, ok := msg.(*lnwire.Shutdown)
if !ok {
t.Fatalf("expected Shutdown message, got %T", msg)
}
respDeliveryScript := shutdownMsg.Address
// Alice will thereafter send a ClosingSigned message, indicating her
// proposed closing transaction fee.
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed message")
}
responderClosingSigned, ok := msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// We don't agree with the fee, and will send back one that's 2.5x.
preferredRespFee := responderClosingSigned.FeeSatoshis
increasedFee := btcutil.Amount(float64(preferredRespFee) * 2.5)
initiatorSig, _, _, err := initiatorChan.CreateCloseProposal(
increasedFee, dummyDeliveryScript, respDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err := lnwire.NewSigFromRawSignature(initiatorSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned := lnwire.NewClosingSigned(chanID, increasedFee, parsedSig)
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// The responder will see the new fee we propose, but with current
// settings it won't accept it immediately as it differs too much by
// its ideal fee. We should get a new proposal back, which should have
// the average fee rate proposed.
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed message")
}
responderClosingSigned, ok = msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// The fee sent by the responder should be less than the fee we just
// sent as it should attempt to compromise.
peerFee := responderClosingSigned.FeeSatoshis
if peerFee > increasedFee {
t.Fatalf("new fee should be less than our fee: new=%v, "+
"prior=%v", peerFee, increasedFee)
}
lastFeeResponder := peerFee
// We try negotiating a 2.1x fee, which should also be rejected.
increasedFee = btcutil.Amount(float64(preferredRespFee) * 2.1)
initiatorSig, _, _, err = initiatorChan.CreateCloseProposal(
increasedFee, dummyDeliveryScript, respDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err = lnwire.NewSigFromRawSignature(initiatorSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned = lnwire.NewClosingSigned(chanID, increasedFee, parsedSig)
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// It still won't be accepted, and we should get a new proposal, the
// average of what we proposed, and what they proposed last time.
select {
case outMsg := <-responder.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed message")
}
responderClosingSigned, ok = msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// The peer should inch towards our fee, in order to compromise.
// Additionally, this fee should be less than the fee we sent prior.
peerFee = responderClosingSigned.FeeSatoshis
if peerFee < lastFeeResponder {
t.Fatalf("new fee should be greater than prior: new=%v, "+
"prior=%v", peerFee, lastFeeResponder)
}
if peerFee > increasedFee {
t.Fatalf("new fee should be less than our fee: new=%v, "+
"prior=%v", peerFee, increasedFee)
}
// Finally, we'll accept the fee by echoing back the same fee that they
// sent to us.
initiatorSig, _, _, err = initiatorChan.CreateCloseProposal(
peerFee, dummyDeliveryScript, respDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err = lnwire.NewSigFromRawSignature(initiatorSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned = lnwire.NewClosingSigned(chanID, peerFee, parsedSig)
responder.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// The responder will now see that we agreed on the fee, and broadcast
// the closing transaction.
select {
case <-broadcastTxChan:
case <-time.After(time.Second * 5):
t.Fatalf("closing tx not broadcast")
}
// And the responder should be waiting for a confirmation notification.
notifier.confChannel <- &chainntnfs.TxConfirmation{}
}
// TestPeerChannelClosureFeeNegotiationsInitiator tests the shutdown
// initiator's behavior in the case where we must do several rounds of fee
// negotiation before we agree on a fee.
func TestPeerChannelClosureFeeNegotiationsInitiator(t *testing.T) {
t.Parallel()
notifier := &mockNotfier{
confChannel: make(chan *chainntnfs.TxConfirmation),
}
broadcastTxChan := make(chan *wire.MsgTx)
initiator, initiatorChan, responderChan, cleanUp, err := createTestPeer(
notifier, broadcastTxChan)
if err != nil {
t.Fatalf("unable to create test channels: %v", err)
}
defer cleanUp()
// We make the initiator send a shutdown request.
updateChan := make(chan interface{}, 1)
errChan := make(chan error, 1)
closeCommand := &htlcswitch.ChanClose{
CloseType: htlcswitch.CloseRegular,
ChanPoint: initiatorChan.ChannelPoint(),
Updates: updateChan,
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TargetFeePerKw: 12500,
Err: errChan,
}
initiator.localCloseChanReqs <- closeCommand
// We should now be getting the shutdown request.
var msg lnwire.Message
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive shutdown request")
}
shutdownMsg, ok := msg.(*lnwire.Shutdown)
if !ok {
t.Fatalf("expected Shutdown message, got %T", msg)
}
initiatorDeliveryScript := shutdownMsg.Address
// We'll answer the shutdown message with our own Shutdown, and then a
// ClosingSigned message.
chanID := lnwire.NewChanIDFromOutPoint(initiatorChan.ChannelPoint())
respShutdown := lnwire.NewShutdown(chanID, dummyDeliveryScript)
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: respShutdown,
}
estimator := chainfee.NewStaticEstimator(12500, 0)
initiatorIdealFeeRate, err := estimator.EstimateFeePerKW(1)
if err != nil {
t.Fatalf("unable to query fee estimator: %v", err)
}
initiatorIdealFee := responderChan.CalcFee(initiatorIdealFeeRate)
increasedFee := btcutil.Amount(float64(initiatorIdealFee) * 2.5)
closeSig, _, _, err := responderChan.CreateCloseProposal(
increasedFee, dummyDeliveryScript, initiatorDeliveryScript,
)
if err != nil {
t.Fatalf("unable to create close proposal: %v", err)
}
parsedSig, err := lnwire.NewSigFromRawSignature(closeSig)
if err != nil {
t.Fatalf("unable to parse signature: %v", err)
}
closingSigned := lnwire.NewClosingSigned(
shutdownMsg.ChannelID, increasedFee, parsedSig,
)
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// We should get two closing signed messages, the first will be the
// ideal fee sent by the initiator in response to our shutdown request.
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed")
}
closingSignedMsg, ok := msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
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if closingSignedMsg.FeeSatoshis != initiatorIdealFee {
t.Fatalf("expected ClosingSigned fee to be %v, instead got %v",
initiatorIdealFee, closingSignedMsg.FeeSatoshis)
}
lastFeeSent := closingSignedMsg.FeeSatoshis
// The second message should be the compromise fee sent in response to
// them receiving our fee proposal.
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed")
}
closingSignedMsg, ok = msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// The peer should inch towards our fee, in order to compromise.
// Additionally, this fee should be less than the fee we sent prior.
peerFee := closingSignedMsg.FeeSatoshis
if peerFee < lastFeeSent {
t.Fatalf("new fee should be greater than prior: new=%v, "+
"prior=%v", peerFee, lastFeeSent)
}
if peerFee > increasedFee {
t.Fatalf("new fee should be less than our fee: new=%v, "+
"prior=%v", peerFee, increasedFee)
}
lastFeeSent = closingSignedMsg.FeeSatoshis
// We try negotiating a 2.1x fee, which should also be rejected.
increasedFee = btcutil.Amount(float64(initiatorIdealFee) * 2.1)
responderSig, _, _, err := responderChan.CreateCloseProposal(
increasedFee, dummyDeliveryScript, initiatorDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err = lnwire.NewSigFromRawSignature(responderSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned = lnwire.NewClosingSigned(chanID, increasedFee, parsedSig)
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// It still won't be accepted, and we should get a new proposal, the
// average of what we proposed, and what they proposed last time.
select {
case outMsg := <-initiator.outgoingQueue:
msg = outMsg.msg
case <-time.After(time.Second * 5):
t.Fatalf("did not receive closing signed")
}
initiatorClosingSigned, ok := msg.(*lnwire.ClosingSigned)
if !ok {
t.Fatalf("expected ClosingSigned message, got %T", msg)
}
// Once again, the fee sent by the initiator should be greater than the
// last fee they sent, but less than the last fee we sent.
peerFee = initiatorClosingSigned.FeeSatoshis
if peerFee < lastFeeSent {
t.Fatalf("new fee should be greater than prior: new=%v, "+
"prior=%v", peerFee, lastFeeSent)
}
if peerFee > increasedFee {
t.Fatalf("new fee should be less than our fee: new=%v, "+
"prior=%v", peerFee, increasedFee)
}
// At this point, we'll accept their fee by sending back a CloseSigned
// message with an identical fee.
responderSig, _, _, err = responderChan.CreateCloseProposal(
peerFee, dummyDeliveryScript, initiatorDeliveryScript,
)
if err != nil {
t.Fatalf("error creating close proposal: %v", err)
}
parsedSig, err = lnwire.NewSigFromRawSignature(responderSig)
if err != nil {
t.Fatalf("error parsing signature: %v", err)
}
closingSigned = lnwire.NewClosingSigned(chanID, peerFee, parsedSig)
initiator.chanCloseMsgs <- &closeMsg{
cid: chanID,
msg: closingSigned,
}
// Wait for closing tx to be broadcasted.
select {
case <-broadcastTxChan:
case <-time.After(time.Second * 5):
t.Fatalf("closing tx not broadcast")
}
}