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lnwallet: include r-hash of canceled htlc in log entry for cancel

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This commit modifies the logic around adding cancel entries to the
update log for the commitment state machine slightly by also including
the r-hash of the HTLC that’s been cancelled in the entry for the
cancellation. With this change, we can accurately track which HTLC is
being cancelled within outer sub-systems.
This commit is contained in:
Olaoluwa Osuntokun 2017-01-07 19:58:54 -08:00
parent 81767eb8fd
commit c9dbaa1403
No known key found for this signature in database
GPG Key ID: 9CC5B105D03521A2
2 changed files with 11 additions and 2 deletions
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5
lnwallet/channel.go
View File

@ -1736,11 +1736,11 @@ func (lc *LightningChannel) CancelHTLC(rHash [32]byte) (uint32, error) {
if addEntry == nil {
return 0, fmt.Errorf("unable to find HTLC to cancel")
}
pd := &PaymentDescriptor{
Amount: addEntry.Amount,
Index: lc.ourLogCounter,
RHash: addEntry.RHash,
ParentIndex: addEntry.Index,
Index: lc.ourLogCounter,
EntryType: Cancel,
}
@ -1766,6 +1766,7 @@ func (lc *LightningChannel) ReceiveCancelHTLC(logIndex uint32) error {
htlc := addEntry.Value.(*PaymentDescriptor)
pd := &PaymentDescriptor{
Amount: htlc.Amount,
RHash: htlc.RHash,
ParentIndex: htlc.Index,
Index: lc.theirLogCounter,
EntryType: Cancel,

8
lnwallet/channel_test.go
View File

@ -1222,10 +1222,18 @@ func TestCancelHTLC(t *testing.T) {
len(aliceChannel.remoteCommitChain.tip().outgoingHTLCs) != 0 {
t.Fatalf("htlc's still active from alice's POV")
}
if len(aliceChannel.localCommitChain.tip().incomingHTLCs) != 0 ||
len(aliceChannel.remoteCommitChain.tip().incomingHTLCs) != 0 {
t.Fatalf("htlc's still active from alice's POV")
}
if len(bobChannel.localCommitChain.tip().outgoingHTLCs) != 0 ||
len(bobChannel.remoteCommitChain.tip().outgoingHTLCs) != 0 {
t.Fatalf("htlc's still active from bob's POV")
}
if len(bobChannel.localCommitChain.tip().incomingHTLCs) != 0 ||
len(bobChannel.remoteCommitChain.tip().incomingHTLCs) != 0 {
t.Fatalf("htlc's still active from bob's POV")
}
expectedBalance := btcutil.Amount(btcutil.SatoshiPerBitcoin * 5)
if aliceChannel.channelState.OurBalance != expectedBalance {