Commit Graph

280 Commits

Author SHA1 Message Date
Joost Jager
c1345a4117
multi: use separate cltv expiry field from invoice
Now that the Invoice struct contains the decoded final cltv delta value,
the decoding of payment requests can be removed from the invoice
registry.
2019-09-04 19:20:19 +02:00
Joost Jager
05e6b62cb2
cnct+htlcswitch+invoices: report circuit key to invoice registry
Currently the invoice registry cannot tell apart the htlcs that pay to
an invoice. Because htlcs may also be replayed on startup, it isn't
possible to determine the total amount paid to an invoice.

This commit is a first step towards fixing that. It reports the circuit
keys of htlcs to the invoice registry, which forms the basis for
accurate invoice accounting.
2019-09-04 19:20:13 +02:00
Joost Jager
5871d69bde
cnct: convert supplement functions to methods 2019-09-04 19:20:11 +02:00
Olaoluwa Osuntokun
23cc8389f2
multi: add TLV awareness to htlcswitch, pass extra EOB to the invoice registry
In this commit, we update the `HopIterator` to gain awareness of the new
TLV hop payload. The default `HopIterator` will now hide the details of
the TLV from the caller, and return the same `ForwardingInfo` struct in
a uniform manner. We also add a new method: `ExtraOnionBlob` to allow
the caller to obtain the raw EOB (the serialized TLV stream) to pass
around.

Within the link, we'll now pass the EOB information into the invoice
registry. This allows the registry to parse out any additional
information from the EOB that it needs to settle the payment, such as a
preimage shard in the AMP case.
2019-08-22 18:53:05 -07:00
Johan T. Halseth
ed8d635cf1
contractcourt/briefcase: avoid bucket modification in ForEach loop
Since the contents were deleted before the bucket was deleted, we just
delete the bucket immediately.
2019-06-14 21:09:02 +02:00
Olaoluwa Osuntokun
0343327994
Merge pull request #3026 from wpaulino/sweeper-fee-preference
sweep: add support for multiple fee preferences to UtxoSweeper
2019-05-27 16:02:37 -07:00
Olaoluwa Osuntokun
2011ccc571
contractcourt: write confirmed CommitSet to disk before MarkChannelClosed
In this commit, we make a series of changes to ensure that we'll be able
to properly survive restarts if we crash right after we call
MarkChannelClosed. In order to ensure we can survive restarts, we'll now
long the confirmed CommitSet to disk right before we close the channel.
Upon restart, we'll read these from disk so we can pick up where we left
over.

Additionally, we also will now consult the legacy chain actions if it
turns out that the channel has been closed, but we don't have a
confCommitSet written to disk. This will only be the case for nodes that
had pending close channels before this commitment.
2019-05-27 15:26:46 -07:00
Olaoluwa Osuntokun
364c0dd9f1
contractcourt: add storage for the confirmed CommitSet
In this commit, we add storage to the Briefcase for reading/writing a
confirmed CommitSet. This will be used in follow up commits to ensure
that we're able to survive restarts after we mark a channel as pending
closed. Along the way, we also re-add the FetchChainActions struct as
legacy nodes will need this storage.
2019-05-27 15:26:44 -07:00
Olaoluwa Osuntokun
086f4eb8b3
contractcourt: add new TestChannelArbitratorDanglingCommitForceClose test 2019-05-27 15:26:43 -07:00
Olaoluwa Osuntokun
b4a116fd07
contractcourt: update TestChannelArbitratorLocalForceClosePendingHtlc to assert resolution msg delivery 2019-05-27 15:26:42 -07:00
Olaoluwa Osuntokun
ea7bae8492
contractcourt: remove the now unused chain actions methods
We still keep the `actionsBucketKey` variable around so current
contracts will clean up the existing state once they've been fully
resolved.
2019-05-27 15:26:41 -07:00
Olaoluwa Osuntokun
087e22d817
contractcourt: obtain supplementary HTLC info from the htlcSets
Since we no longer have up to date chain actions on disk, we'll use the
HTLC sets in memory which contain the necessary information we need to
in order to obtain the HTLC amounts.
2019-05-27 15:26:40 -07:00
Olaoluwa Osuntokun
8a34b1ae88
contractcourt: only send resolution messages if we have any to send 2019-05-27 15:26:39 -07:00
Olaoluwa Osuntokun
877b8c55d3
contractcourt: stop writing chain actions to disk
We don't need them as we'll just reconstruct the chain actions once a
commitment has actually confirmed.
2019-05-27 15:26:38 -07:00
Olaoluwa Osuntokun
fb91f0be70
contractcourt: reconstruct chain actions at time of commitment confirmation
In this commit, we change the behavior of the channel arb to no longer
write chain actions to disk. Instead, using the new CommitSet struct,
we'll replay our set of prior actions based on what actually got into
the chain. As a result, we no longer need to write the chain actions at
all, instead they're reconstructed at run time to determine decisions,
and before any commitments are broadcast in order to determine if we
need to go to chain at all.
2019-05-27 15:26:37 -07:00
Olaoluwa Osuntokun
fc617cd041
contractcourt: add new checkLocalChainActions method use in main state step
In this commit, we add a new `checkLocalChainActions` method. This
method differs from the existing `checkChainActions` method in that it's
only concerned with actions we should take on chain for our local state
based on the local _and_ remote state. This change ensures that we'll
now to go to chain order to cancel an HTLC that was on the remote
party's commitment transaction, but not our own.
2019-05-27 15:26:36 -07:00
Olaoluwa Osuntokun
5f0fad85be multi: address lingering TODO by no longer wiping out local HTLCs on remote close
In this commit, we fix a lingering TOOD statement in the channel arb.
Before this commitment, we would simply wipe our our local HTLC set of
the HTLC set that was on the remote commitment transaction on force
close. This was incorrect as if our commitment transaction had an HTLC
that the remote commitment didn't, then we would fail to cancel that
back, and cause both channels to time out on chain.

In order to remedy this, we introduce a new `HtlcSetKey` struct to track
all 3 possible in-flight set of HTLCs: ours, theirs, and their pending.

We also we start to tack on additional data to all the unilateral close
messages we send to subscribers. This new data is the CommitSet, or the
set of valid commitments at channel closure time. This new information
will be used by the channel arb in an upcoming commit to ensure it will
cancel back HTLCs in the case of split commitment state.

Finally, we start to thread through an optional *CommitSet to the
advanceState method. This additional information will give the channel
arb addition information it needs to ensure it properly cancels back
HTLCs that are about to time out or may time out depending on which
commitment is played.

Within the htlcswitch pakage, we modify the `SignNextCommitment` method
to return the new set of pending HTLCs for the remote party's commitment
transaction and `ReceiveRevocation` to return the latest set of
commitment transactions on the remote party's commitment as well. This
is a preparatory change which is part of a larger change to address a
lingering TODO in the cnct.

Additionally, rather than just send of the set of HTLCs after the we
revoke, we'll also send of the set of HTLCs after the remote party
revokes, and we create a pending commitment state for it.
2019-05-27 14:34:13 -07:00
Wilmer Paulino
5172a5e255
multi: support arbitrary client fee preferences to UtxoSweeper
In this commit, we introduce support for arbitrary client fee
preferences when accepting input sweep requests. This is possible with
the addition of fee rate buckets. Fee rate buckets are buckets that
contain inputs with similar fee rates within a specific range, e.g.,
1-10 sat/vbyte, 11-20 sat/vbyte, etc. Having these buckets allows us to
batch and sweep inputs from different clients with similar fee rates
within a single transaction, allowing us to save on chain fees.

With this addition, we can now get rid of the UtxoSweeper's default fee
preference. As of this commit, any clients using the it to sweep inputs
specify the same fee preference to not change their behavior. Each of
these can be fine-tuned later on given their use cases.
2019-05-24 15:30:38 -07:00
Joost Jager
3d17c2bcfe
cnct/test: add incoming contest resolver test 2019-05-15 14:42:18 +02:00
Joost Jager
16ff4e3ffa
cnct/test: extend mockWitnessBeacon 2019-05-15 14:42:15 +02:00
Joost Jager
064e8492de
cnct+htlcswitch+invoices: move invoice parameter check out of link
This commit is the final step in making the link unaware of invoices. It
now purely offers the htlc to the invoice registry and follows
instructions from the invoice registry about how and when to respond to
the htlc.

The change also fixes a bug where upon restart, hodl htlcs were
subjected to the invoice minimum cltv delta requirement again. If the
block height has increased in the mean while, the htlc would be canceled
back.

Furthermore the invoice registry interaction is aligned between link and
contract resolvers.
2019-05-15 14:42:12 +02:00
Joost Jager
d8dac49112
cnct: add invoice registry interface
Create an interface type to be able to mock the registry in unit tests.
2019-05-15 14:42:01 +02:00
Joost Jager
1a80a1e540
witness_beacon: do not look up invoice preimages
This commit isolates preimages of forwarded htlcs from invoice
preimages. The reason to do this is to prevent the incoming contest
resolver from settling exit hop htlcs for which the invoice isn't marked
as settled.
2019-05-15 14:41:58 +02:00
Joost Jager
99e42ddde6
cnct: be stricter about matching preimages
The former tryApplyPreimage function silently ignored invalid preimages.
This could mask potential bugs. This commit makes the logic stricter and
generates an error in case an unexpected mismatch occurs.
2019-05-15 14:41:55 +02:00
Joost Jager
ec6a35d6e8
cnct: do not depend on ChainIO in incoming contest resolver
New behaviour of the chain notifier to always send the current block
immediately after registration takes away the need to make a separate
GetBestBlock call on ChainIO.
2019-05-15 14:41:52 +02:00
Joost Jager
d55a8b7b29
channel+cnct: remove preimage from channel and resolution
Now that the success resolver preimage field is always populated by the
incoming contest resolver, preimage lookups earlier in the
process (channel and channel arbitrator) can mostly be removed.
2019-05-15 14:41:49 +02:00
Joost Jager
6886a0117f
cnct: always create incoming contest resolver
One of the first things the incoming contest resolver does is checking
if the preimage is available and if it is, convert itself into a success
resolver.

This behaviour makes it unnecessary to already determine earlier in the
process whether an incoming contest or a success resolver is needed.

By having all incoming htlcs go through the incoming contest resolver,
the number of execution paths is reduced and it becomes easier to
ascertain that the implemented logic is correct.

The only functional change in this commit is that a forwarded htlc for
which is the preimage is known, is no longer settled when the htlc is
already expired. Previously a success resolver would be instantiated
directly, skipping the expiry height check.

This created a risk that the success resolver would never finish,
because an expired htlc could already have been swept by the remote
party and there is no detection of this remote spend in the success
resolver currently.

With the new change, the general direction that an expired htlc
shouldn't be settled and instead given up on is implemented more
consistently.

This commit prepares for fixing edges cases related to hodl
invoice on-chain resolution.
2019-05-15 14:41:47 +02:00
Johan T. Halseth
10070ecab7
lnwallet: make BlockChainIO.GetUTXO take cancel chan
Use quit channels as cancel chan for call to GetUTXO.
2019-05-09 14:44:47 +02:00
Johan T. Halseth
beb5d14ed9
lnwallet/btcwallet: add compile time check for BlockChainIO interface 2019-05-09 14:44:41 +02:00
Johan T. Halseth
c4415f0400
Merge pull request #3044 from cfromknecht/spelling-fixes
multi: fix spelling mistakes
2019-05-07 08:50:36 +02:00
Conner Fromknecht
17b2140cb5
multi: fix spelling mistakes 2019-05-04 15:35:37 -07:00
Olaoluwa Osuntokun
bdf1194835
contractcourt: detect local force closes based on commitment outputs
In this commit, we modify the way we detect local force closes. Before
this commit, we would directly check the broadcast commitment's txid
against what we know to be our best local commitment. In the case of DLP
recovery from an SCB, it's possible that the user force closed, _then_
attempted to recover their channels. As a result, we need to check the
outputs directly in order to also handle this rare, but
possible recovery scenario.

The new detection method uses the outputs to detect if it's a local
commitment or not. Based on the state number, we'll re-derive the
expected scripts, and check to see if they're on the commitment. If not,
then we know it's a remote force close. A new test has been added to
exercise this new behavior, ensuring we catch local closes where we have
and don't have a direct output.
2019-04-26 15:13:01 -07:00
Olaoluwa Osuntokun
279a17b3bf
contractcourt: speed up TestChainWatcherDataLossProtect by ditching quickcheck
In this commit, we speed up the `TestChainWatcherDataLossProtect`
_considerably_ by enumerating relevant tests using table driven tests
rather than generating random tests via the `testing/quick` package.
Each of these test cases are also run in parallel bringing down the
execution time of this test from a few minutes, to a few seconds.
2019-04-25 16:03:28 -07:00
Joost Jager
86eb0a3383
cnct: log go to chain reason
This commit adds logging of the reason to go to chain for a channel.
This can help users to find out the reason why a channels forced closed.

To get all go to chain reasons, an optimization to break early is
removed. This optimization was not significant, because the normal flow
already examined all htlcs. In the exceptional case where we need to go
to chain, it does not weigh up against logging all go to chain reasons.
2019-04-08 10:34:41 +02:00
Joost Jager
ab4da0f53d
cnct: define separate broadcast delta for outgoing htlcs
This commits exposes the various parameters around going to chain and
accepting htlcs in a clear way.

In addition to this, it reverts those parameters to what they were
before the merge of commit d1076271456bdab1625ea6b52b93ca3e1bd9aed9.
2019-04-05 11:36:07 +02:00
Olaoluwa Osuntokun
893cff60c4
Merge pull request #2839 from joostjager/htlc-expiry-check
link: increase expiry grace delta for exit hop and forwarded htlcs
2019-04-01 18:15:56 -07:00
Olaoluwa Osuntokun
26f6fd7db2
contractcourt: ignore all other dispatch cases in closeObserver when recovered chan
In this commit, we modify the `closeObserver` to fast path the DLP
dispatch case if we detect that the channel has been restored. We do
this as otherwise, we may inadvertently enter one of the other cases
erroneously, causing us to now properly look up their dlp commitment
point.
2019-03-28 17:54:00 -07:00
Olaoluwa Osuntokun
c722f2c064
contractcourt: only look for local force close for non-recovered channel
In this commit, we modify the main `closeObserver` dispatch loop to only
look for the local force close if we didn't recover the channel. We do
this, as for a recovered channel, it isn't possible for us to force
close from a recovered channel.
2019-03-28 17:53:59 -07:00
Olaoluwa Osuntokun
b491488c6f
contractcourt: update to new ChanSyncMsg API, reflow comments where needed 2019-03-28 17:53:57 -07:00
Jim Posen
d107627145
contractcourt: remove broadcastRedeemMultiplier
The multiplier doesn't make sense because funds may be equally at risk
by failing to broadcast to chain regardless of whether the HTLC is a
redeem or a timeout.
2019-03-26 14:31:51 +01:00
Olaoluwa Osuntokun
c7ca387a9d
Merge pull request #2744 from cfromknecht/disable-before-close
cnct+chancloser: disable channel before closing
2019-03-21 21:08:23 -07:00
Olaoluwa Osuntokun
db411c244e
contractcourt: add new set of tests in htlcTimeoutResolver to exercise refactorings 2019-03-19 16:50:28 -07:00
Olaoluwa Osuntokun
6b24b6dabd
contractcourt: simplify htlcTimeoutResolver, unify with HTLC contest logic
In this commit, we simplify the existing `htlcTImeoutResolver` with some
newly refactored out methods from the `htlcTimeoutContestResolver`. The
resulting logic is easier to follow as it's more linear, and only deals
with spend notifications rather than both spend _and_ confirmation
notifications.
2019-03-19 16:50:27 -07:00
Olaoluwa Osuntokun
e1a07b68e8
contractcourt: extract which timeout HTLC output to watch into new method 2019-03-19 16:50:09 -07:00
Olaoluwa Osuntokun
b078cea83f contractcourt: move claimCleanUp from contest resolver to timeout 2019-03-19 16:49:56 -07:00
Olaoluwa Osuntokun
aa1cd04dbf
Merge pull request #2022 from joostjager/holdinvoice
htlcswitch: hodl invoice
2019-03-15 13:26:53 -07:00
Olaoluwa Osuntokun
5ef95a51dc
Merge pull request #2766 from Roasbeef/chain-watcher-fix-off-by-one
contractcourt: fix off-by-one error in closeObserver
2019-03-15 13:26:08 -07:00
Joost Jager
32f2b047e8
htlcswitch: hodl invoice
This commit modifies the invoice registry to handle invoices for which
the preimage is not known yet (hodl invoices). In that case, the
resolution channel passed in from links and resolvers is stored until we
either learn the preimage or want to cancel the htlc.
2019-03-15 10:09:17 +01:00
Joost Jager
1f41a2abce
htlcswitch: abtract invoice from link
This commit detaches signaling the invoice registry that an htlc was
locked in from the actually settling of the htlc.

It is a preparation for hodl invoices.
2019-03-15 10:09:15 +01:00
Joost Jager
449c3d533e
contractcourt: add access to full invoice registry from resolvers
Previously a function pointer was passed to chain arbitrator to avoid a
circular dependency. Now that the routetypes package exists, we can pass
the full invoice registry to chain arbitrator.

This is a preparation to be able to use other invoice registry methods
in contract resolvers.
2019-03-15 10:08:35 +01:00
Wilmer Paulino
7946d0a256
multi: remove ErrDoubleSpend check for PublishTransaction
In this commit, we address a lingering issue within some subsystems that
are responsible for broadcasting transactions. Previously,
ErrDoubleSpend indicated that a transaction was already included in the
mempool/chain. This error was then modified to actually be returned for
conflicting transactions, but its callers were not modified accordingly.
This would lead to conflicting transactions to be interpreted as valid,
when they shouldn't be.
2019-03-13 17:57:19 -07:00
Olaoluwa Osuntokun
6983a9e146
contractcourt: fix off-by-one error in closeObserver case
In this commit, we fix an off-by-one error when handling force closes
from the remote party. Before this commit, if the remote party
broadcasts state 2, and we were on state 1, then we wouldn't act at all.
This is due to an extraneous +1 in the comparison, causing us to only
detect this DLP case if the remote party's state is two beyond what we
know atm. Before this commit, the test added in the prior commit failed.
2019-03-13 17:31:23 -07:00
Olaoluwa Osuntokun
795c9f1550
contractcourt: add new TestChainWatcherDataLossProtect test case
In this commit, we add a new test case to exercise the way we handle the
DLP detection and dispatch within the chain watcher. Briefly, we use
the `testing/quick` package to ensure that the following invariant is
always held: "if we do N state updates, then state M is broadcast, iff M
> N, we'll execute the DLP protocol". We limit the number of iterations
to 10 for now, as the tests can take a bit of time to execute, since it
actually does proper state transitions.
2019-03-13 17:31:21 -07:00
Olaoluwa Osuntokun
48532dc9f6
contractcourt: abstract call to GetStateNumHint within the closeObserver
In this commit, we abstract the call to `GetStateNumHint` within the
`closeObserver` method to a function closure in the primary config. This
allows us to feed in an arbitrary broadcast state number within unit
tests.
2019-03-13 17:31:20 -07:00
Conner Fromknecht
325d77c431
chancloser+cnct: disable channel before closing 2019-03-12 17:34:28 -07:00
Olaoluwa Osuntokun
bc72691806
contractcourt: mark channel as borked before removing the link
In this commit, we ensure that we mark the channel as borked before we
remove the link during the force close process. This ensures that if the
peer reconnects right after we remove the link, then it won't be loaded
into memory in `loadActiveChannels`. We'll now:

  * mark the channel as borked
  * remove the link
  * read the channel state from disk
  * force close

This ensures that the link (if it's active) is able to commit any
pending changes to disk before we read out the channel to force close.
2019-03-08 19:15:08 -08:00
Joost Jager
f23fdf95e7
cnct: fix error returning bug
The wrong error variable was returned, causing a resolution failure to
be interpreted by the channel arbitrator as a success.
2019-02-26 12:56:21 -03:00
Conner Fromknecht
29f07a58cb
cnct+lnwl+hswc: use lntypes.Preimage for witness beacon 2019-02-19 17:06:00 -08:00
Conner Fromknecht
30f61b7630
multi: make AddPreimage variadic, optimistically compute key
In this commit, we modify the WitnessCache's
AddPreimage method to accept a variadic number
of preimages. This enables callers to batch
preimage writes in performance critical areas
of the codebase, e.g. the htlcswitch.

Additionally, we lift the computation of the
witnesses' keys outside of the db transaction.
This saves us from having to do hashing inside
and blocking other callers, and limits extraneous
blocking at the call site.
2019-02-19 17:05:04 -08:00
Valentine Wallace
10090a978d contractcourt/chain_arbitrator: notify the ChannelNotifier on newly closed channels. 2019-02-05 18:17:54 -08:00
Olaoluwa Osuntokun
8aecccf266
Merge pull request #2407 from joostjager/commit-resolver-sweeper
cnct: use sweeper in commit resolver
2019-02-01 17:34:51 -08:00
Olaoluwa Osuntokun
4af857f0c6
Merge pull request #2356 from joostjager/invoices-subserver
invoices: add subscribesingleinvoice
2019-02-01 17:19:58 -08:00
Joost Jager
bacd92418a
invoices: use lntypes.Hash and lntypes.Preimage
Previously chainhash.Hash was used, which converts to/from string in
reversed format. Payment hashes and preimages are supposed to be
non-reversed.
2019-02-01 09:42:29 +01:00
Joost Jager
55aee9c703
cnct: expose non-incubating htlcs after channel force close
In this commit we fix a reporting gap that previously existed for htlcs
that were still contested.
2019-02-01 09:36:47 +01:00
Joost Jager
e486340106
cnct: use sweeper in commit resolver
Now that the sweeper is available, it isn't necessary anymore for the
commit resolver to craft its own sweep tx. Instead it can offer its
input to the sweeper and wait for the outcome.
2019-02-01 09:20:45 +01:00
Joost Jager
9abe06f3c8
cnct: finish channel arbitrator in StateFullyResolved
Previously the arbitrator wasn't advanced to the final stage after
the last contract resolved.

Also channel arbitrator now does not ignore a log error anymore
unresolved contracts cannot be retrieved.
2019-02-01 09:10:04 +01:00
Joost Jager
9e012ecc93
multi: move Input interface and related code
This commit is a step to split the lnwallet package. It puts the Input
interface and implementations in a separate package along with all their
dependencies from lnwallet.
2019-01-31 13:25:33 +01:00
Olaoluwa Osuntokun
4fd1f832d7
contractcourt+rpc: use new FetchChannel method instead of scanning
In this commit, we modify areas where we need to force close a channel
to use the new FetchChannel method instead of manually scanning. This
dramatically reduces the CPU usage when doing things like closing a
large number of channels within lnd.
2019-01-28 20:24:45 -08:00
Wilmer Paulino
41f638c7cf
contractcourt+server: settle invoice for on-chain HTLC sweep
In this commit, we extend the htlcSuccessResolver to settle the invoice,
if any, of the corresponding on-chain HTLC sweep. This ensures that the
invoice state is consistent as when claiming the HTLC "off-chain".
2019-01-22 20:46:14 -08:00
Wilmer Paulino
974e0f2df5
cnct: make original htlc amt available for contract resolvers
Previously, contract resolvers that needed to publish a second level tx,
did not have access to the original htlc amount.

This commit reconstructs this amount from data that is already persisted
in arbitrator log.

Co-authored-by: Joost Jager <joost.jager@gmail.com>
2019-01-22 20:47:17 -08:00
Wilmer Paulino
93754f8d37
lnwallet: add HtlcPoint() resolution helper methods
Co-authored-by: Joost Jager <joost.jager@gmail.com>
2019-01-22 20:47:13 -08:00
Wilmer Paulino
865f7568d6
cnct: extract relaunching of resolvers to method
Co-authored-by: Joost Jager <joost.jager@gmail.com>
2019-01-22 20:46:14 -08:00
Joost Jager
4ec3fc3b1a
cnct: split resolvers in separate files 2019-01-16 20:03:59 +01:00
Olaoluwa Osuntokun
509bed614c
Merge pull request #2198 from Roasbeef/sendall-rpc
multi: add ability to sweep all coins in the the wallet to an addr to sendcoins
2019-01-15 14:49:17 -08:00
Olaoluwa Osuntokun
400a1d3282
Merge pull request #2431 from cfromknecht/keyring-remote-delay-retribution
lnwallet: Add keyring and remote CSV delay to BreachRetribution
2019-01-11 15:33:16 -08:00
Conner Fromknecht
eb2f5cecf6
multi: remove breach tx arg from NewBreachRetribution args
This commit removes the breach transaction from the
arguments passed to NewBreachRetribution. We already
keep all prior remote commitments on disk in the
commitment log, and load that transaction from disk
inside the method. In practice, the one loaded from
disk will be the same one that is passed in by the
caller, so there should be no change in behavior
as we've already derived the appropriate state number.

This changes makes integration with the watchtower
client simpler, since we no longer need to acquire
the breaching commitment transaction to be able to
construct the BreachRetribution. This simplifies
not only the logic surrounding transient backsups,
but also on startup (and later, retroactively
backing up historic updates).
2019-01-10 13:13:38 -08:00
Olaoluwa Osuntokun
73c9c2ee15
sweep+cnct+nursery+rpc: extract DetermineFeePerKw to func, add FeePreference
In this commit, we extract the existing determineFeePerKw method on the
RPC server into a new file in the sweep package. Along the way, we
consolidate code by introducing a new FeePreference struct, which allows
the caller to express their fee preference either in blocks to
confirmation, or a direct fee rate. This move takes a small step to
father decoupling calls in the main RPC server.
2019-01-09 15:55:17 -08:00
Conner Fromknecht
088fb33718
contractcourt: nil keyring curves on breach info 2019-01-07 17:15:45 -08:00
Joost Jager
687d4e7725
cnct: add todo comment for sweeper 2018-12-18 10:50:22 +01:00
Joost Jager
e43e89514f
sweep+utxonursery+cnct+breacharbiter: add height hint to input
This commit is a preparation for the implementation of remote spend
detection. Remote spends may happen before we broadcast our own sweep
tx. This calls for accurate height hints.
2018-12-18 10:50:11 +01:00
Olaoluwa Osuntokun
febe6cd47f
Merge pull request #2131 from wpaulino/force-close-same-channel
contractcourt/chain_arbitrator: prevent force closing same channel twice
2018-12-17 21:23:57 -08:00
Olaoluwa Osuntokun
fa160f559c
multi: replace per channel sigPool with global daemon level sigPool
In this commit, we remove the per channel `sigPool` within the
`lnwallet.LightningChannel` struct. With this change, we ensure that as
the number of channels grows, the number of gouroutines idling in the
sigPool stays constant. It's the case that currently on the daemon, most
channels are likely inactive, with only a hand full actually
consistently carrying out channel updates. As a result, this change
should reduce the amount of idle CPU usage, as we have less active
goroutines in select loops.

In order to make this change, the `SigPool` itself has been publicly
exported such that outside callers can make a `SigPool` and pass it into
newly created channels. Since the sig pool now lives outside the
channel, we were also able to do away with the Stop() method on the
channel all together.

Finally, the server is the sub-system that is currently responsible for
managing the `SigPool` within lnd.
2018-12-16 15:40:14 -08:00
Wilmer Paulino
60036aca1d
contractcourt/channel_arbitrator: prevent force closing same channel twice
In this commit, we prevent the ChainArbitrator from sending a force
close request for a channel if it has previously already sent one. We do
this to prevent blocking the caller of ForceCloseContract.
2018-12-10 20:37:58 -08:00
Olaoluwa Osuntokun
1fd3aac925
multi: switch from bolt packge to bbolt package for all imports 2018-11-29 20:33:49 -08:00
Johan T. Halseth
9e81b1fe53
chain_watcher: poll for commit point in case of failure
We pool the database for the channel commit point with an exponential
backoff. This is meant to handle the case where we are in process of
handling a channel sync, and the case where we detect a channel close
and must wait for the peer to come online to start channel sync before
we can proceed.
2018-11-21 10:28:57 +01:00
Johan T. Halseth
a9f93b2988
contractcourt/chain_watcher: add channel sync message to CloseChannelSummary 2018-11-21 10:28:56 +01:00
Joost Jager
839752857f
cnct: add comment on expiry calculation 2018-11-07 15:29:57 +01:00
Joost Jager
c3560932b6
cnct: fix log line 2018-11-07 15:29:56 +01:00
Conner Fromknecht
f9cec4a67b
cnct/contract_resolvers: propagate checkpoint failures 2018-10-24 13:57:10 -07:00
Conner Fromknecht
f957b78c0b
cnct/contract_resolvers: ignore duplicate publication error 2018-10-24 13:57:10 -07:00
Conner Fromknecht
682c4c96c7
cnct/contract_resolvers: reliably publish htlc success sweep 2018-10-24 13:57:10 -07:00
Conner Fromknecht
b7aebd92cf
cnct/contract_resolvers: reliably publish commit sweep 2018-10-24 13:57:10 -07:00
Olaoluwa Osuntokun
fc21bf091a
multi: modify sweeper.CreateSweepTx to accept conf target, style changes
In this commit, we modify the newly introduced UtxoSweeper.CreateSweepTx
to accept the confirmation target as a param of the method rather than a
struct level variable. We do this as this allows each caller to decide
at sweep time, what the fee rate should be, rather than using a global
value that is meant to work in all scenarios. For example, anytime
we're sweeping an output with a CLTV lock that's has a dependant
transaction we need to sweep/cancel, we may require a higher fee rate
than a regular force close with a CSV output.
2018-10-18 18:08:27 -07:00
Joost Jager
6977d59e35
cnct: reuse sweep tx logic for success resolver 2018-10-17 12:44:34 +02:00
Joost Jager
c1d845aa0d
cnct: reuse sweep tx logic for commit resolver
Removes duplicate sweep tx code from commit resolver
and delegates generation to UtxoSweeper in the sweep
package.
2018-10-17 12:44:34 +02:00
Conner Fromknecht
59b459674d
multi: init subsystem loggers via build pkg 2018-10-05 13:04:45 +09:00
Olaoluwa Osuntokun
6afee3d099
Merge pull request #1856 from maurycy/typos
multi: fix various typos in comments
2018-09-27 20:38:10 -07:00
Olaoluwa Osuntokun
16ec80e163
contractcourt: update tests to use new IncubateOutputs API 2018-09-25 21:49:10 -07:00
Olaoluwa Osuntokun
1494c9e67f
Merge pull request #1952 from joostjager/chanarb-test
cnct: add channel_arbitor htlcOutgoingContestResolver test
2018-09-25 21:05:43 -07:00
Joost Jager
f34ffab9ba
cnct: add channel_arbitor test that exercises the htlcOutgoingContestResolver 2018-09-20 18:17:23 -07:00