In this commit, we fix a bug that could at times cause a deadlock when a
peer is attempting to disconnect. The issue was that when a peer goes to
disconnect, it needs to stop any active msgStream instances. The Stop()
method of the msgStream would block until an atomic variable was set to
indicate that the stream had fully exited. However, in the case that we
disconnected lower in the msgConsumer loop, we would never set the
streamShutdown variable, meaning that msgStream.Stop() would never
unblock.
The fix for this is simple: set the streamShutdown variable within the
quit case of the second select statement in the msgConsumer goroutine.
This commit removes the mining of a block within the integration tests,
that would lead to a flake during runs. The reason was that the sweeoing
transaction was actually broadcast already at this point, and this block
was mined with the assumption that it wasn't. However, test would pass
more often than not because the UTXO nursery would be working on
graduating new heights, whcih is a bit slow, so in most cases the block
would be mined before it had broadcast the sweeping transaction.
By removing this block we ensure that the sweeping transaction will be
found for sure in the waitForTxInMempool call below.
In this commit, we modify the SignMessage+VerifyMessage slightly in
order to bind the message we're signing to our specific context. We do
this by pre-pending the ascii text "Lightning Signed Message:" to the
msg before we run it through dsha256. Adding this prefix binds the
message to our context in order to avoid accidentally signing a sighash
or the like.
This commit makes clients subscribing to channel events that are marked
"sync dispatch" _not_ being deleted from the list of clients when they
call Cancel(). Instead a go routine will be launched that will send an
error on every read of the ProcessACK channel.
This fixes a race in handing off the breach info while lnd was shutting
down. The breach arbiter could end up being shut down (and calling
Cancel()) before while the ChainWatcher was in the process of
dispatching a breach. Since the breach arbiter no longer was among the
registered clients at this point, the ChainWatcher would assume the
breach was handed off successfully, and mark the channel as pending
closed. When lnd now was restarted, the breach arbiter would not know
about the breach, and the ChainWatcher wouldn't attempt to re-dispatch,
as it was already marked as pending closed.
This commit modifies the integration tests to work with the recent
changes to the ChannelArbitrator, where it will only act on commitments
that has been confirmed. Main changes involving when to look for
transactions in the mempool and in blocks, and using the new RPC for
getting channels in the "waiting close" phase when they are waiting for
the commitment to confirm.
This commit adds a new method FetchWaitingCloseChannels to the database,
used for fetching OpenChannels that have a ChanStatus != Default. These
are channels that are borked, or have had a commitment broadcasted, and
is now waiting for it to confirm.
The fetchChannels method is rewritten to return channels exclusively
based on wheter they are pending or waitingClose.
This commit adds MVP unit tests for the following scenarios in the
ChannelArbitrator:
1) A cooperative close is confirmed.
2) A remote force close is confirmed.
3) A local force close is requested and confirmed.
4) A local force close is requested, but a remote force close gets
confirmed.
This commit changes the ChainWatcher to only send a chain event in case
the various spends are _confirmed_ on-chain, not only seen on the
network.
A consequence of this is that we now give the ChainWatcher the
responsibility of marking the channel closed when the closing tx is
confirmed, instead of the ChannelArbitrator.
