mirror of
https://github.com/lightningnetwork/lnd.git
synced 2024-11-19 09:53:54 +01:00
e8e87322dd
This commit adds the fee negotiation procedure performed on channel shutdown. The current algorithm picks an ideal a fee based on the FeeEstimator and commit weigth, then accepts the remote's fee if it is at most 50%-200% away from the ideal. The fee negotiation procedure is similar both as sender and receiver of the initial shutdown message, and this commit also make both sides use the same code path for handling these messages.
522 lines
16 KiB
Go
522 lines
16 KiB
Go
package main
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import (
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"testing"
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"time"
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"github.com/btcsuite/btclog"
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"github.com/lightningnetwork/lnd/chainntnfs"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/htlcswitch"
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"github.com/lightningnetwork/lnd/lnrpc"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/txscript"
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"github.com/roasbeef/btcd/wire"
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)
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func disablePeerLogger(t *testing.T) {
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peerLog = btclog.Disabled
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srvrLog = btclog.Disabled
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lnwallet.UseLogger(btclog.Disabled)
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htlcswitch.UseLogger(btclog.Disabled)
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channeldb.UseLogger(btclog.Disabled)
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}
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// TestPeerChannelClosureAcceptFeeResponder tests the shutdown responder's
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// behavior if we can agree on the fee immediately.
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func TestPeerChannelClosureAcceptFeeResponder(t *testing.T) {
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disablePeerLogger(t)
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t.Parallel()
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notifier := &mockNotfier{
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confChannel: make(chan *chainntnfs.TxConfirmation),
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}
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broadcastTxChan := make(chan *wire.MsgTx)
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responder, responderChan, initiatorChan, cleanUp, err := createTestPeer(
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notifier, broadcastTxChan)
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if err != nil {
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t.Fatalf("unable to create test channels: %v", err)
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}
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defer cleanUp()
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chanID := lnwire.NewChanIDFromOutPoint(responderChan.ChannelPoint())
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// We send a shutdown request to Alice. She will now be the responding
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// node in this shutdown procedure. We first expect Alice to answer this
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// shutdown request with a Shutdown message.
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responder.shutdownChanReqs <- lnwire.NewShutdown(chanID, dummyDeliveryScript)
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var msg lnwire.Message
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive shutdown message")
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}
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shutdownMsg, ok := msg.(*lnwire.Shutdown)
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if !ok {
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t.Fatalf("expected Shutdown message, got %T", msg)
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}
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respDeliveryScript := shutdownMsg.Address
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// Alice will thereafter send a ClosingSigned message, indicating her
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// proposed closing transaction fee.
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive ClosingSigned message")
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}
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responderClosingSigned, ok := msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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// We accept the fee, and send a ClosingSigned with the same fee back,
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// so she knows we agreed.
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peerFee := responderClosingSigned.FeeSatoshis
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initiatorSig, proposedFee, err := initiatorChan.CreateCloseProposal(
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peerFee, dummyDeliveryScript, respDeliveryScript)
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if err != nil {
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t.Fatalf("error creating close proposal: %v", err)
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}
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initSig := append(initiatorSig, byte(txscript.SigHashAll))
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parsedSig, err := btcec.ParseSignature(initSig, btcec.S256())
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if err != nil {
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t.Fatalf("error parsing signature: %v", err)
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}
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closingSigned := lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
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responder.closingSignedChanReqs <- closingSigned
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// The responder will now see that we agreed on the fee, and broadcast
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// the closing transaction.
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select {
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case <-broadcastTxChan:
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case <-time.After(time.Second * 5):
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t.Fatalf("closing tx not broadcast")
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}
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// And the initiator should be waiting for a confirmation notification.
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notifier.confChannel <- &chainntnfs.TxConfirmation{}
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}
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// TestPeerChannelClosureAcceptFeeInitiator tests the shutdown initiator's
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// behavior if we can agree on the fee immediately.
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func TestPeerChannelClosureAcceptFeeInitiator(t *testing.T) {
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disablePeerLogger(t)
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t.Parallel()
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notifier := &mockNotfier{
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confChannel: make(chan *chainntnfs.TxConfirmation),
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}
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broadcastTxChan := make(chan *wire.MsgTx)
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initiator, initiatorChan, responderChan, cleanUp, err := createTestPeer(
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notifier, broadcastTxChan)
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if err != nil {
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t.Fatalf("unable to create test channels: %v", err)
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}
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defer cleanUp()
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// We make the initiator send a shutdown request.
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updateChan := make(chan *lnrpc.CloseStatusUpdate, 1)
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errChan := make(chan error, 1)
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closeCommand := &htlcswitch.ChanClose{
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CloseType: htlcswitch.CloseRegular,
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ChanPoint: initiatorChan.ChannelPoint(),
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Updates: updateChan,
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Err: errChan,
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}
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initiator.localCloseChanReqs <- closeCommand
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// We should now be getting the shutdown request.
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var msg lnwire.Message
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select {
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case outMsg := <-initiator.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive shutdown request")
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}
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shutdownMsg, ok := msg.(*lnwire.Shutdown)
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if !ok {
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t.Fatalf("expected Shutdown message, got %T", msg)
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}
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initiatorDeliveryScript := shutdownMsg.Address
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// We'll answer the shutdown message with our own Shutdown, and then a
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// ClosingSigned message.
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chanID := shutdownMsg.ChannelID
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initiator.shutdownChanReqs <- lnwire.NewShutdown(chanID,
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dummyDeliveryScript)
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estimator := lnwallet.StaticFeeEstimator{FeeRate: 50}
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feeRate := estimator.EstimateFeePerWeight(1) * 1000
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fee := responderChan.CalcFee(feeRate)
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closeSig, proposedFee, err := responderChan.CreateCloseProposal(fee,
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dummyDeliveryScript, initiatorDeliveryScript)
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if err != nil {
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t.Fatalf("unable to create close proposal: %v", err)
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}
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parsedSig, err := btcec.ParseSignature(closeSig, btcec.S256())
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if err != nil {
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t.Fatalf("unable to parse signature: %v", err)
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}
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closingSigned := lnwire.NewClosingSigned(shutdownMsg.ChannelID,
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proposedFee, parsedSig)
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initiator.closingSignedChanReqs <- closingSigned
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// And we expect the initiator to accept the fee, and broadcast the
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// closing transaction.
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select {
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case outMsg := <-initiator.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive closing signed message")
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}
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closingSignedMsg, ok := msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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if closingSignedMsg.FeeSatoshis != proposedFee {
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t.Fatalf("expected ClosingSigned fee to be %v, instead got %v",
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proposedFee, closingSignedMsg.FeeSatoshis)
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}
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// The initiator will now see that we agreed on the fee, and broadcast
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// the closing transaction.
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select {
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case <-broadcastTxChan:
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case <-time.After(time.Second * 5):
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t.Fatalf("closing tx not broadcast")
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}
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// And the initiator should be waiting for a confirmation notification.
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notifier.confChannel <- &chainntnfs.TxConfirmation{}
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}
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// TestPeerChannelClosureFeeNegotiationsResponder tests the shutdown responder's
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// behavior in the case where we must do several rounds of fee negotiation
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// before we agree on a fee.
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func TestPeerChannelClosureFeeNegotiationsResponder(t *testing.T) {
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disablePeerLogger(t)
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t.Parallel()
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notifier := &mockNotfier{
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confChannel: make(chan *chainntnfs.TxConfirmation),
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}
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broadcastTxChan := make(chan *wire.MsgTx)
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responder, responderChan, initiatorChan, cleanUp, err := createTestPeer(
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notifier, broadcastTxChan)
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if err != nil {
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t.Fatalf("unable to create test channels: %v", err)
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}
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defer cleanUp()
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chanID := lnwire.NewChanIDFromOutPoint(responderChan.ChannelPoint())
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// We send a shutdown request to Alice. She will now be the responding
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// node in this shutdown procedure. We first expect Alice to answer this
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// shutdown request with a Shutdown message.
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responder.shutdownChanReqs <- lnwire.NewShutdown(chanID,
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dummyDeliveryScript)
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var msg lnwire.Message
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive shutdown message")
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}
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shutdownMsg, ok := msg.(*lnwire.Shutdown)
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if !ok {
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t.Fatalf("expected Shutdown message, got %T", msg)
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}
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respDeliveryScript := shutdownMsg.Address
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// Alice will thereafter send a ClosingSigned message, indicating her
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// proposed closing transaction fee.
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive closing signed message")
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}
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responderClosingSigned, ok := msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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// We don't agree with the fee, and will send back one that's 2.5x.
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preferredRespFee := responderClosingSigned.FeeSatoshis
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increasedFee := uint64(float64(preferredRespFee) * 2.5)
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initiatorSig, proposedFee, err := initiatorChan.CreateCloseProposal(
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increasedFee, dummyDeliveryScript, respDeliveryScript,
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)
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if err != nil {
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t.Fatalf("error creating close proposal: %v", err)
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}
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parsedSig, err := btcec.ParseSignature(initiatorSig, btcec.S256())
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if err != nil {
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t.Fatalf("error parsing signature: %v", err)
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}
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closingSigned := lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
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responder.closingSignedChanReqs <- closingSigned
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// The responder will see the new fee we propose, but with current
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// settings wont't accept anything over 2*FeeRate. We should get a new
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// proposal back, which should have the average fee rate proposed.
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive closing signed message")
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}
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responderClosingSigned, ok = msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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avgFee := (preferredRespFee + increasedFee) / 2
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peerFee := responderClosingSigned.FeeSatoshis
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if peerFee != avgFee {
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t.Fatalf("expected ClosingSigned with fee %v, got %v",
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proposedFee, responderClosingSigned.FeeSatoshis)
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}
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// We try negotiating a 2.1x fee, which should also be rejected.
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increasedFee = uint64(float64(preferredRespFee) * 2.1)
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initiatorSig, proposedFee, err = initiatorChan.CreateCloseProposal(
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increasedFee, dummyDeliveryScript, respDeliveryScript,
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)
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if err != nil {
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t.Fatalf("error creating close proposal: %v", err)
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}
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parsedSig, err = btcec.ParseSignature(initiatorSig, btcec.S256())
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if err != nil {
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t.Fatalf("error parsing signature: %v", err)
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}
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closingSigned = lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
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responder.closingSignedChanReqs <- closingSigned
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// It still won't be accepted, and we should get a new proposal, the
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// average of what we proposed, and what they proposed last time.
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select {
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case outMsg := <-responder.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive closing signed message")
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}
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responderClosingSigned, ok = msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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avgFee = (peerFee + increasedFee) / 2
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peerFee = responderClosingSigned.FeeSatoshis
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if peerFee != avgFee {
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t.Fatalf("expected ClosingSigned with fee %v, got %v",
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proposedFee, responderClosingSigned.FeeSatoshis)
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}
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// Accept fee.
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initiatorSig, proposedFee, err = initiatorChan.CreateCloseProposal(
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peerFee, dummyDeliveryScript, respDeliveryScript,
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)
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if err != nil {
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t.Fatalf("error creating close proposal: %v", err)
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}
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initSig := append(initiatorSig, byte(txscript.SigHashAll))
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parsedSig, err = btcec.ParseSignature(initSig, btcec.S256())
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if err != nil {
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t.Fatalf("error parsing signature: %v", err)
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}
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closingSigned = lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
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responder.closingSignedChanReqs <- closingSigned
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// The responder will now see that we agreed on the fee, and broadcast
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// the closing transaction.
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select {
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case <-broadcastTxChan:
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case <-time.After(time.Second * 5):
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t.Fatalf("closing tx not broadcast")
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}
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// And the responder should be waiting for a confirmation notification.
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notifier.confChannel <- &chainntnfs.TxConfirmation{}
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}
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// TestPeerChannelClosureFeeNegotiationsInitiator tests the shutdown initiator's
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// behavior in the case where we must do several rounds of fee negotiation
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// before we agree on a fee.
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func TestPeerChannelClosureFeeNegotiationsInitiator(t *testing.T) {
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disablePeerLogger(t)
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t.Parallel()
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notifier := &mockNotfier{
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confChannel: make(chan *chainntnfs.TxConfirmation),
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}
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broadcastTxChan := make(chan *wire.MsgTx)
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initiator, initiatorChan, responderChan, cleanUp, err := createTestPeer(
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notifier, broadcastTxChan)
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if err != nil {
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t.Fatalf("unable to create test channels: %v", err)
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}
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defer cleanUp()
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// We make the initiator send a shutdown request.
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updateChan := make(chan *lnrpc.CloseStatusUpdate, 1)
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errChan := make(chan error, 1)
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closeCommand := &htlcswitch.ChanClose{
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CloseType: htlcswitch.CloseRegular,
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ChanPoint: initiatorChan.ChannelPoint(),
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Updates: updateChan,
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Err: errChan,
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}
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initiator.localCloseChanReqs <- closeCommand
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// We should now be getting the shutdown request.
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var msg lnwire.Message
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select {
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case outMsg := <-initiator.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive shutdown request")
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}
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shutdownMsg, ok := msg.(*lnwire.Shutdown)
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if !ok {
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t.Fatalf("expected Shutdown message, got %T", msg)
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}
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initiatorDeliveryScript := shutdownMsg.Address
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// We'll answer the shutdown message with our own Shutdown, and then a
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// ClosingSigned message.
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chanID := lnwire.NewChanIDFromOutPoint(initiatorChan.ChannelPoint())
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respShutdown := lnwire.NewShutdown(chanID, dummyDeliveryScript)
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initiator.shutdownChanReqs <- respShutdown
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estimator := lnwallet.StaticFeeEstimator{FeeRate: 50}
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initiatorIdealFeeRate := estimator.EstimateFeePerWeight(1) * 1000
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initiatorIdealFee := responderChan.CalcFee(initiatorIdealFeeRate)
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increasedFee := uint64(float64(initiatorIdealFee) * 2.5)
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closeSig, proposedFee, err := responderChan.CreateCloseProposal(
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increasedFee, dummyDeliveryScript, initiatorDeliveryScript,
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)
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if err != nil {
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t.Fatalf("unable to create close proposal: %v", err)
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}
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parsedSig, err := btcec.ParseSignature(closeSig, btcec.S256())
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if err != nil {
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t.Fatalf("unable to parse signature: %v", err)
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}
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closingSigned := lnwire.NewClosingSigned(shutdownMsg.ChannelID,
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proposedFee, parsedSig)
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initiator.closingSignedChanReqs <- closingSigned
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// And we expect the initiator to reject the fee, and suggest a lower
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// one.
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select {
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case outMsg := <-initiator.outgoingQueue:
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msg = outMsg.msg
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case <-time.After(time.Second * 5):
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t.Fatalf("did not receive closing signed")
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}
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closingSignedMsg, ok := msg.(*lnwire.ClosingSigned)
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if !ok {
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t.Fatalf("expected ClosingSigned message, got %T", msg)
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}
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avgFee := (initiatorIdealFee + increasedFee) / 2
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peerFee := closingSignedMsg.FeeSatoshis
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if peerFee != avgFee {
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t.Fatalf("expected ClosingSigned fee to be %v, instead got %v",
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avgFee, peerFee)
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}
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// We try negotiating a 2.1x fee, which should also be rejected.
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increasedFee = uint64(float64(initiatorIdealFee) * 2.1)
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responderSig, proposedFee, err := responderChan.CreateCloseProposal(
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increasedFee, dummyDeliveryScript, initiatorDeliveryScript,
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)
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if err != nil {
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t.Fatalf("error creating close proposal: %v", err)
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}
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parsedSig, err = btcec.ParseSignature(responderSig, btcec.S256())
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if err != nil {
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t.Fatalf("error parsing signature: %v", err)
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}
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closingSigned = lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
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initiator.closingSignedChanReqs <- closingSigned
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// It still won't be accepted, and we should get a new proposal, the
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// average of what we proposed, and what they proposed last time.
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select {
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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)
|
|
}
|
|
|
|
avgFee = (peerFee + increasedFee) / 2
|
|
peerFee = initiatorClosingSigned.FeeSatoshis
|
|
if peerFee != avgFee {
|
|
t.Fatalf("expected ClosingSigned with fee %v, got %v",
|
|
proposedFee, initiatorClosingSigned.FeeSatoshis)
|
|
}
|
|
|
|
// Accept fee.
|
|
responderSig, proposedFee, err = responderChan.CreateCloseProposal(
|
|
peerFee, dummyDeliveryScript, initiatorDeliveryScript,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("error creating close proposal: %v", err)
|
|
}
|
|
|
|
respSig := append(responderSig, byte(txscript.SigHashAll))
|
|
parsedSig, err = btcec.ParseSignature(respSig, btcec.S256())
|
|
if err != nil {
|
|
t.Fatalf("error parsing signature: %v", err)
|
|
}
|
|
closingSigned = lnwire.NewClosingSigned(chanID, proposedFee, parsedSig)
|
|
initiator.closingSignedChanReqs <- closingSigned
|
|
|
|
// Wait for closing tx to be broadcasted.
|
|
select {
|
|
case <-broadcastTxChan:
|
|
case <-time.After(time.Second * 5):
|
|
t.Fatalf("closing tx not broadcast")
|
|
}
|
|
}
|