Commit Graph

73 Commits

Author SHA1 Message Date
Olaoluwa Osuntokun
320101d054
contractcourt: convert to use new kvdb abstraction 2020-03-18 19:34:52 -07:00
Joost Jager
d2b6472843
cnct: pre-confirmation anchor sweep
Start anchor sweep attempts immediately after the commitment transaction
has been published. This makes the anchor known to the sweeper and
allows the user to bump the fee on it to get their commitment
transaction confirmed in case the fee committed too is insufficient for
timely confirmation.
2020-03-18 12:26:55 +01:00
Joost Jager
7f3d4e7d49
cnct: create channel interface for arbitrator
Allows unit testing of the channel arbitrator with fewer dependencies.
This is a preparation for the addition of anchor sweeping.
2020-03-17 16:25:31 +01:00
carla
4eb3036f67
contractcourt: record force and breach close initiator 2020-02-21 13:53:43 +02:00
Roei Erez
0407b37fce contractcourt+switch: keep channels with timed-out initiated htlcs.
This commit enables the user to specify he is not interested in
automatically close channels with pending payments that their
corresponding htlcs have timed-out.
By requiring a configurable grace period uptime of our node
before closing such channels, we give a chance to the other node to
properly cancel the htlc and avoid unnecessary on-chain transaction.
In mobile it is very important for the user experience as otherwise
channels will be force closed more frequently.
2020-02-16 09:08:03 +02:00
Conner Fromknecht
b3c28c9cba
contractcourt: generalize rebroadcast for force and coop 2019-12-04 14:25:28 -08:00
Olaoluwa Osuntokun
faa5f340fd
contractcourt: export ResolveContract, update to stop channel arb
In this commit, we export the `ResolveContract` method as it's useful as
a way to manually remove active contracts from the chain and channel
arbitrator. Along the way, we also update the method to also attempt to
stop the channel arb if it exists. This allows an external party to
remove all state with a single call. Before this commit, it was assumed
that this method was only called by the channel arb itself, when it was
already on the way to exiting after all contracts were fully resolved.

We also add a set of unit tests to exercise the intended behavior as
this method is now public.
2019-11-20 17:42:52 -08:00
Joost Jager
08c9db9725
cnct: create sweeper interface 2019-11-14 13:38:04 +01:00
Joost Jager
919ab60540
utxonursery: remove unused commit sweep code
Now that the commit sweep resolver is no longer relying on the nursery,
all code associated with commit sweeping can be removed.
2019-11-14 13:38:03 +01:00
Joost Jager
0d7119a8ca
cnct: parse onion for resolvers
With the introduction of additional payload fields for mpp, it becomes
a necessity to have their values available in the on-chain resolution
flow. The incoming contest resolver notifies the invoice registry of the
arrival of a payment and needs to supply all parameters for the registry
to validate the htlc.
2019-11-12 15:01:39 +01:00
Olaoluwa Osuntokun
777ed104a3
chainfee: create new chainfee package extracting fees from lnwallet
In this commit, we create a new chainfee package, that houses all fee
related functionality used within the codebase. The creation of this new
package furthers our long-term goal of extracting functionality from the
bloated `lnwallet` package into new distinct packages. Additionally,
this new packages resolves a class of import cycle that could arise if a
new package that was imported by something in `lnwallet` wanted to use
the existing fee related functions in the prior `lnwallet` package.
2019-10-31 16:41:57 -07:00
Joost Jager
b58dbb2d70
multi: fix canceled spelling 2019-10-03 17:27:36 +02:00
Johan T. Halseth
425afd28ea
contractcourt/chain_arbitrator: republish closeTx for open channels 2019-09-25 14:04:43 +02:00
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
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
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
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
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
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
aa1cd04dbf
Merge pull request #2022 from joostjager/holdinvoice
htlcswitch: hodl invoice
2019-03-15 13:26:53 -07:00
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
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
Valentine Wallace
10090a978d contractcourt/chain_arbitrator: notify the ChannelNotifier on newly closed channels. 2019-02-05 18:17:54 -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
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
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
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
Johan T. Halseth
3a67fe2552
contractcourt+server: make IncubateOutputs take broadcastHeight 2018-09-20 12:54:48 +02:00
Conner Fromknecht
0c74575c44
contractcourt/chain_arbitrator: parallel chain watcher start
This commit restructures the initialization procedure
for chain watchers such that they can proceed in parallel.
This is primarily to help nodes running with the neutrino
backend, which otherwise forces a serial rescan for each
active channel to check for spentness.

Doing so allows the rescans to take advantage of batch
scheduling in registering for the spend notifications,
ensuring that only one or two passes are made, as opposed
to one for each channel.

Lastly, this commit ensures that the chain arb is properly
shutdown if any of it's chain watchers or channel arbs
fails to start, so as to cancel their goroutines before
exiting.
2018-09-11 16:10:29 -07:00
Johan T. Halseth
1758ad829f
contractcourt/[chain|channel]_arbitrator: define IsPendingClose 2018-08-23 00:03:22 +02:00
Johan T. Halseth
3549f2bc17
contractcourt/[channel|chain]_arbitrator: define MarkChannelClosed 2018-08-22 23:51:04 +02:00
Valentine Wallace
1ffc3bb82e
multi: update to latest RegisterBlockEpochNtfn interface 2018-08-10 01:08:57 -07:00
Conner Fromknecht
8758671552
contractcourt/chain_arbitrator: fix potential shutdown race
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.
2018-08-03 16:46:41 -07:00
Olaoluwa Osuntokun
ac9f9bd061
contractcourt: remove now obsolete code from the chain arbitrator
We no longer need this code fragment as the chain watcher is now able to
handle confirmed cooperative channel closures itself.
2018-07-31 21:29:00 -07:00
Olaoluwa Osuntokun
c707577e99
contractcourt: update conf ntfn registartions to use pkScript not txid 2018-07-31 21:28:49 -07:00
Olaoluwa Osuntokun
e0baa49690
Merge pull request #1387 from wpaulino/send-disable-chan-update
multi: send a channel update with disabled flag set on channel close
2018-07-23 17:46:37 -07:00
Johan T. Halseth
57e829f47e
multi: remove mempool bool from RegisterSpendNtfn 2018-07-22 23:09:08 +02:00
Johan T. Halseth
a16bb662a4
contractcourt/chain_arbitrator: make watchForChannelClose use confirmed spend 2018-07-22 23:09:07 +02:00
Wilmer Paulino
d26050f711
contractcourt: use MarkChannelResolved for coop channel closures
In this commit, we alter cooperative channel closures to also use
MarkChannelResolved in order to unify the logic for the different types
of channel closures.
2018-07-17 17:35:28 -07:00
Olaoluwa Osuntokun
6f60f139f4 multi: switch over import paths from roasbeef/* to btcsuite/* 2018-07-13 17:05:39 -07:00
Wilmer Paulino
873cccc7a6
multi: send channel update with disabled active on force and coop chan closes 2018-07-11 17:07:03 -07:00
Johan T. Halseth
1c43a0cb36
contractcourt/chain_arbitrator: delete watcher from activeWatchers 2018-06-21 11:13:46 +01:00
maurycy
3be08e69cf multi: 64bit aligment of atomic vars on arm/x86-32 2018-06-04 20:02:34 -07:00
Johan T. Halseth
8afc7bf66e
contractcourt/chain_arbitrator: add TODO for removing watchForChannelClose 2018-05-24 10:24:31 +02:00