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lnwallet/channel: make ErrCommitSyncLocalDataLoss type

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This commit converts the ErrCommitSyncLocalDataLoss error into a struct,
that also holds the received last unrevoked commit point from the remote
party.
This commit is contained in:
Johan T. Halseth
2019-09-06 13:14:39 +02:00
parent d75feeb953
commit f40f4620f7
3 changed files with 37 additions and 14 deletions
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40
lnwallet/channel.go
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@@ -81,16 +81,6 @@ var (
ErrInvalidLocalUnrevokedCommitPoint = fmt.Errorf("unrevoked commit " +
"point is invalid")
// ErrCommitSyncLocalDataLoss is returned in the case that we receive a
// valid commit secret within the ChannelReestablish message from the
// remote node AND they advertise a RemoteCommitTailHeight higher than
// our current known height. This means we have lost some critical
// data, and must fail the channel and MUST NOT force close it. Instead
// we should wait for the remote to force close it, such that we can
// attempt to sweep our funds.
ErrCommitSyncLocalDataLoss = fmt.Errorf("possible local commitment " +
"state data loss")
// ErrCommitSyncRemoteDataLoss is returned in the case that we receive
// a ChannelReestablish message from the remote that advertises a
// NextLocalCommitHeight that is lower than what they have already
@@ -101,6 +91,30 @@ var (
"state data loss")
)
// ErrCommitSyncLocalDataLoss is returned in the case that we receive a valid
// commit secret within the ChannelReestablish message from the remote node AND
// they advertise a RemoteCommitTailHeight higher than our current known
// height. This means we have lost some critical data, and must fail the
// channel and MUST NOT force close it. Instead we should wait for the remote
// to force close it, such that we can attempt to sweep our funds. The
// commitment point needed to sweep the remote's force close is encapsuled.
type ErrCommitSyncLocalDataLoss struct {
// ChannelPoint is the identifier for the channel that experienced data
// loss.
ChannelPoint wire.OutPoint
// CommitPoint is the last unrevoked commit point, sent to us by the
// remote when we determined we had lost state.
CommitPoint *btcec.PublicKey
}
// Error returns a string representation of the local data loss error.
func (e *ErrCommitSyncLocalDataLoss) Error() string {
return fmt.Sprintf("ChannelPoint(%v) with CommitPoint(%x) had "+
"possible local commitment state data loss", e.ChannelPoint,
e.CommitPoint.SerializeCompressed())
}
// channelState is an enum like type which represents the current state of a
// particular channel.
// TODO(roasbeef): actually update state
@@ -3313,7 +3327,11 @@ func (lc *LightningChannel) ProcessChanSyncMsg(
if err != nil {
return nil, nil, nil, err
}
return nil, nil, nil, ErrCommitSyncLocalDataLoss
return nil, nil, nil, &ErrCommitSyncLocalDataLoss{
ChannelPoint: lc.channelState.FundingOutpoint,
CommitPoint: msg.LocalUnrevokedCommitPoint,
}
// If the height of our commitment chain reported by the remote party
// is behind our view of the chain, then they probably lost some state,