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lnwallet: fix dust limit checks and toChannelDelta() handling of dust

This commit is contained in:
Christopher Jämthagen 2017-01-20 14:39:15 +01:00 committed by Olaoluwa Osuntokun
parent 05a90df67a
commit 2222df21f3
1 changed files with 47 additions and 13 deletions
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60
lnwallet/channel.go
View File

@ -92,7 +92,9 @@ const (
// payments requested by the wallet/daemon.
type PaymentHash [32]byte
// updateType is the exact type of an entry within the shared HTLC log.
const maxUint16 uint16 = ^uint16(0)
// UpdateType is the exact type of an entry within the shared HTLC log.
type updateType uint8
const (
@ -185,6 +187,11 @@ type PaymentDescriptor struct {
ourPkScript []byte
theirPkScript []byte
theirPrevPkScript []byte
// isDust[Local|Remote] denotes if this HTLC is below the dust limit in
// locally or remotely.
isDustLocal bool
isDustRemote bool
}
// commitment represents a commitment to a new state within an active channel.
@ -286,7 +293,16 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
return idx, nil
}
var index uint16
var err error
for _, htlc := range c.outgoingHTLCs {
if (ourCommit && htlc.isDustLocal) ||
(!ourCommit && htlc.isDustRemote) {
index = maxUint16
} else if index, err = locateOutputIndex(htlc); err != nil {
return nil, err
}
h := &channeldb.HTLC{
Incoming: false,
Amt: htlc.Amount,
@ -298,6 +314,13 @@ func (c *commitment) toChannelDelta(ourCommit bool) (*channeldb.ChannelDelta, er
delta.Htlcs = append(delta.Htlcs, h)
}
for _, htlc := range c.incomingHTLCs {
if (ourCommit && htlc.isDustLocal) ||
(!ourCommit && htlc.isDustRemote) {
index = maxUint16
} else if index, err = locateOutputIndex(htlc); err != nil {
return nil, err
}
h := &channeldb.HTLC{
Incoming: true,
Amt: htlc.Amount,
@ -1014,6 +1037,8 @@ func (lc *LightningChannel) restoreStateLogs() error {
EntryType: Add,
addCommitHeightRemote: pastHeight,
addCommitHeightLocal: pastHeight,
isDustLocal: htlc.Amt < lc.channelState.OurDustLimit,
isDustRemote: htlc.Amt < lc.channelState.TheirDustLimit,
}
if !htlc.Incoming {
@ -1144,8 +1169,12 @@ func (lc *LightningChannel) fetchCommitmentView(remoteChain bool,
if err != nil {
return nil, err
}
//var isDust bool
//if ourCommitTx {
//isDust =
for _, htlc := range filteredHTLCView.ourUpdates {
if htlc.Amount < dustLimit {
if (ourCommitTx && htlc.isDustLocal) ||
(!ourCommitTx && htlc.isDustRemote) {
continue
}
@ -1156,7 +1185,8 @@ func (lc *LightningChannel) fetchCommitmentView(remoteChain bool,
}
}
for _, htlc := range filteredHTLCView.theirUpdates {
if htlc.Amount < dustLimit {
if (ourCommitTx && htlc.isDustLocal) ||
(!ourCommitTx && htlc.isDustRemote) {
continue
}
@ -1874,11 +1904,13 @@ func (lc *LightningChannel) AddHTLC(htlc *lnwire.UpdateAddHTLC) (uint64, error)
}
pd := &PaymentDescriptor{
EntryType: Add,
RHash: PaymentHash(htlc.PaymentHash),
Timeout: htlc.Expiry,
Amount: htlc.Amount,
Index: lc.localUpdateLog.logIndex,
EntryType: Add,
RHash: PaymentHash(htlc.PaymentHash),
Timeout: htlc.Expiry,
Amount: htlc.Amount,
Index: lc.localUpdateLog.logIndex,
isDustLocal: htlc.Amount < lc.channelState.OurDustLimit,
isDustRemote: htlc.Amount < lc.channelState.TheirDustLimit,
}
lc.localUpdateLog.appendUpdate(pd)
@ -1899,11 +1931,13 @@ func (lc *LightningChannel) ReceiveHTLC(htlc *lnwire.UpdateAddHTLC) (uint64, err
}
pd := &PaymentDescriptor{
EntryType: Add,
RHash: PaymentHash(htlc.PaymentHash),
Timeout: htlc.Expiry,
Amount: htlc.Amount,
Index: lc.remoteUpdateLog.logIndex,
EntryType: Add,
RHash: PaymentHash(htlc.PaymentHash),
Timeout: htlc.Expiry,
Amount: htlc.Amount,
Index: lc.remoteUpdateLog.logIndex,
isDustLocal: htlc.Amount < lc.channelState.OurDustLimit,
isDustRemote: htlc.Amount < lc.channelState.TheirDustLimit,
}
lc.remoteUpdateLog.appendUpdate(pd)