lnwallet: modify ForceClose to disallow closing if local data loss
In this commit, we ensure that if a channel is detected to have local data loss, then we don't allow a force close attempt, as this may not be possible, or cause us to play an invalid state.
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@ -5640,14 +5640,24 @@ func (lc *LightningChannel) ForceClose() (*LocalForceCloseSummary, error) {
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lc.Lock()
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defer lc.Unlock()
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// If we've detected local data loss for this channel, then we won't
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// allow a force close, as it may be the case that we have a dated
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// version of the commitment, or this is actually a channel shell.
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if lc.channelState.HasChanStatus(channeldb.ChanStatusLocalDataLoss) {
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return nil, fmt.Errorf("cannot force close channel with "+
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"state: %v", lc.channelState.ChanStatus())
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}
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commitTx, err := lc.getSignedCommitTx()
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if err != nil {
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return nil, err
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}
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localCommitment := lc.channelState.LocalCommitment
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summary, err := NewLocalForceCloseSummary(lc.channelState,
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lc.Signer, lc.pCache, commitTx, localCommitment)
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summary, err := NewLocalForceCloseSummary(
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lc.channelState, lc.Signer, lc.pCache, commitTx,
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localCommitment,
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)
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if err != nil {
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return nil, err
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}
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@ -17,6 +17,7 @@ import (
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"github.com/btcsuite/btcutil"
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"github.com/davecgh/go-spew/spew"
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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/lnwire"
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)
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@ -6274,3 +6275,33 @@ func TestChannelRestoreCommitHeight(t *testing.T) {
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bobChannel = restoreAndAssertCommitHeights(t, bobChannel, true, 0, 2, 1)
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bobChannel = restoreAndAssertCommitHeights(t, bobChannel, true, 1, 2, 2)
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}
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// TestForceCloseFailLocalDataLoss tests that we don't allow a force close of a
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// channel that's in a non-default state.
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func TestForceCloseFailLocalDataLoss(t *testing.T) {
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t.Parallel()
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aliceChannel, _, cleanUp, err := CreateTestChannels()
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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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// Now that we have our set of channels, we'll modify the channel state
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// to have a non-default channel flag.
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err = aliceChannel.channelState.ApplyChanStatus(
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channeldb.ChanStatusLocalDataLoss,
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)
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if err != nil {
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t.Fatalf("unable to apply channel state: %v", err)
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}
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// Due to the change above, if we attempt to force close this
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// channel, we should fail as it isn't safe to force close a
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// channel that isn't in the pure default state.
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_, err = aliceChannel.ForceClose()
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if err == nil {
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t.Fatalf("expected force close to fail due to non-default " +
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"chan state")
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}
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}
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