This commit fixes a potential race condition during
shutdown, that could allow the chain arb's
activeWatchers or activeChannels map to be modified
while ranging over their contents. We fix this by
copying the contents into new maps with the mutex
held, before releasing the mutex and shutting down
each watcher or channel arbitrator.
This commit modifies the default BatchTicker
implementation such that it will generate a
new ticker with each call to Start(). This
allows us to create a new ticker after
releasing an old one due to the batch
being empty.
In this commit, we prevent the htlcManager from
being woken up by the batchTicker when there is no
work to be done. Profiling has shown a significant
portion of CPU time idling, since the batch ticker
endlessly demands resources. We resolve this by only
selecting on the batch ticker when we have a
non-empty batch of downstream packets from the
switch.
Corrects an instance that holds a reference to a boltdb
byte slice after returning from the transaction. This
can cause panics under certain conditions, which is
avoided by creating a copy of the key.
This commit corrects our exit hop logic to return
FailFinalExpiryTooSoon if the following check is true:
pd.Timeout-expiryGraceDelta <= heightNow
Previously we returned FailFinalIncorrectCltvExpiry, which
should only be returned if the packet was misconstructed.
This commit replaces the debug Config struct with an empty
one, so that the command line flags are hidden in production
builds.
Production help before commit:
Tor:
--tor.active
--tor.socks=
--tor.dns=
--tor.streamisolation
--tor.control=
--tor.v2
--tor.v2privatekeypath=
--tor.v3
hodl:
--hodl.exit-settle
--hodl.add-incoming
--hodl.settle-incoming
--hodl.fail-incoming
--hodl.add-outgoing
--hodl.settle-outgoing
--hodl.fail-outgoing
--hodl.commit
--hodl.bogus-settle
Help Options:
-h, --help
Production help after commit:
Tor:
--tor.active
--tor.socks=
--tor.dns=
--tor.streamisolation
--tor.control=
--tor.v2
--tor.v2privatekeypath=
--tor.v3
Help Options:
-h, --help
This commit fixes a potential race condition within the
IncomingContestResolver, that could cause us to miss a
preimage that was delivered in time.
Currently we query the db for the preimage, and then
subscribe for notifications. This permits the following
ordering of events:
- query for preimage, returns nothing
- preimage is added and delivered to subscribers
- subscribe to preimages
- preimage never comes through!!
We fix this by reordering to subscribe for preimages and
then query just in case it already exists. The effect is
that the query will always return a valid read of the
preimages that are currently queued for delivery.
In this commit, we correct our size estimates for to-local scripts,
which are used on the commitment transaction and the htlc
success/timeout transactions. There have been observed cases of
transactions getting stuck because our estimates were too low, and cause
the transactions to not be relayed.
Our previous estimate for the commitment to-local script was derived
from an older version of the script. Though the estimate is greater than
the actual size, this has been updated with the current estimate of 79
bytes.
This estimates makes the assumption that CSV delays will be at most
4 bytes when serialized. Since this value is expressed in relative block
heights, this should be more than sufficient for our needs, even though
the maximum possible size for the little-endian int64 is 9 bytes (plus
an OP_DATA).
The other correction is to use the ToLocalScriptSize as our estimate for
htlc timeout/success scripts, as they are the same script. Previously,
our estimate was derived from the proper script, though we were 6 bytes
shy of the new to-local estimate, since we counted the csv_delay as 1
byte, and missed some other OP_DATAs.
All derived estimates have been updating depending on the new and
improved ToLocalScriptSize estimate, and fix some estimates that did not
include the witness length in the estimate.
Finally, we correct some weight miscalculations in:
- AcceptedHtlcTimeoutWitnessSize: missing data push lengths
- OfferedHtlcSuccessWitnessSize: extra 73 byte sig, missing data push lengths
- OfferedHtlcPenaltyWitnessSize: missing 33 byte pubkey
Conner Fromknecht