Commit Graph

1061 Commits

Author SHA1 Message Date
Johan T. Halseth
3e5f2e437d
lnwallet/channel: add TODO 2020-02-19 12:27:42 +01:00
Johan T. Halseth
e398544b8b
lnwallet/channel: take remote commitment view into availableBalance calculation
Since our HTLC must also be added to the remote commitment, we do the
balance caluclation also from the remote chain perspective and report
our minimum balance from the two commit views as our available balance.
2020-02-19 12:27:42 +01:00
Johan T. Halseth
f94464d987
lnwallet: take remote initiator's balance into account
When we send non-dust HTLCs as the non-initiator, the remote party will
have to pay the extra commitment fee. To account for this we figure out
if they can afford paying this fee, if not we report that we only have
balance available for dust HTLCs, since these HTLCs won't increase the
commitment fee.
2020-02-19 12:27:42 +01:00
Johan T. Halseth
9ff79ae595
lnwallet/channel: account for HTLC fee when reporting available balance 2020-02-19 12:27:42 +01:00
Johan T. Halseth
5e89d5b6c2
link+lnwallet: move bandwidth channel reserve validation into channel
Since we want to handle the edge case where paying the HTLC fee would
take the initiator below the reserve, we move the subtraction of the
reserve into availableBalance where this calculation will be performed.
2020-02-19 12:27:42 +01:00
Johan T. Halseth
58dec10680
lnwallet/channel: break up availableBalance 2020-02-19 12:27:41 +01:00
Johan T. Halseth
0d9a1b8656
lnwallet: check local commitment sanity when adding HTLC
This commit adds an extra validation step when adding HTLCs. Previously
we would only validate the remote commitment resulting from adding an
HTLC, which in most cases is enough. However, there are situations where
the dustlimits are different, which could lead to the resulting remote
commitment from adding the HTLC being valid, but not the local
commitment.

Now we also validate the local commitment. A test to trigger the case is
added.
2020-02-19 12:27:41 +01:00
Johan T. Halseth
4ea822efeb
lnwallet tests: add test for dipping remote below chan reserve
This commit adds a test that was previously not performed, namely that
adding a HTLC would dip the remote initiator below its channel reserve.
2020-02-19 12:27:41 +01:00
Johan T. Halseth
05fb272deb
lnwallet/channel: make validateCommitmentSanity take our/their predict
add

To ba able to validate the commitment sanity both for remote and local
commitments, and at the same time predict both our and their add, we let
validateCommitmentSanity take an extra payment descriptor to make this
possible.
2020-02-19 12:27:41 +01:00
Olaoluwa Osuntokun
92b79f6b6a
Merge pull request #3910 from Crypt-iQ/htlc_add_0113
lnwallet: limit received htlc's to MaxAcceptedHTLCs
2020-02-18 17:35:42 -08:00
nsa
5a5e095684
lnwallet: adding TestMaxAsynchronousHtlcs unit test
Adds a new test which asserts that the new ReceiveHTLC logic can
handle proper commitment overflow calculation in the face of
asynchronous updates.
2020-02-15 09:59:50 -05:00
nsa
4af00c6b25
lnwallet: fixing unit tests to properly handle new receive validation
This commit fixes the TestMaxAcceptedHTLCs, TestMaxPendingAmount,
TestMinHTLC, & TestChanReserve unit tests to pass with the new
ReceiveHTLC logic. Instead of asserting specific failures upon
receiving a new commitment signature, the various assertions were
moved to assert on the error returned from ReceiveHTLC.
2020-02-15 09:59:50 -05:00
nsa
56c07a52d8
lnwallet: call valdiateCommitmentSanity in ReceiveHTLC
This commit checks the commitment sanity when receiving an HTLC so
that if a commitment transaction will overflow from an ADD, it is
caught earlier rather than in ReceiveNewCommitment.
2020-02-15 09:59:49 -05:00
Johan T. Halseth
5943e5d8b1
lnwallet: state transition from correct node during test, remove panic
The unit test TestNewBreachRetributionSkipsDustHtlcs triggered a state
transition from Bob, even though it was Alice that had added the HTLCs.
This is wrong since it will lead to Bob still owing Alice a commitment,
which is not accounted for in the unit tests.

We add a sanity check that the add heights has been set for all entries
found in the logs, and return an error otherwise. This won't happen
during normal operation, but it does reveal the mistake in the unit
test, which is fixed by making Alice trigger the transition.

In addition we resolve a long standing TODO by removing a (purposeful)
panic in the channel state machine. Old version of lnd had a bug that
could lead to the parent entries being lost during channel restore. A
panic was added to get to the bottom of if.

This is now fixed, so new nodes shouldn't encounter it. However, to be
on the safe side, instead of panicking we return an error back to
gracefully exit the channel state machine.
2020-02-12 11:10:19 +01:00
Johan T. Halseth
e114f58b5e
lnwallet: unify remote and local update log fetch 2020-02-12 11:10:18 +01:00
Joost Jager
88eae6eafe
lnwallet: fix invalid value use in restoreUpdate
Updates were always restored with the same log index. This could cause a
crash when the logs were compacted and possibly other problems
elsewhere.

Extended unit test to cover the crash scenario.
2020-02-10 13:56:33 +01:00
Joost Jager
1413995ab7
Merge pull request #3872 from joostjager/invalid-sig-fix
htlcswitch+lnwallet+channeldb: invalid sig fix
2020-01-23 21:08:07 +01:00
Joost Jager
82579400b3
lnwallet: restore unsigned acked remote updates
This commit updates the channel state machine to
persistently store remote updates that we have received a
signature for, but that we haven't yet included in a commit
signature of our own.

Previously those updates were only stored in memory and
dropped across restarts. This lead to the production of
an invalid signature and channel force closure. The remote
party expects us to include those updates.
2020-01-15 13:09:35 +01:00
Joost Jager
ed8fa35ed4
lnwallet: extract pending local updates restore method
Extract method in preparation for restoring dangling remote updates. We
need to get rid of the early return.
2020-01-15 12:37:26 +01:00
Joost Jager
6a866890a8
lnwallet/test: test remote update after restart
This test asserts that remote updates that are locked-in on the local
commitment, but haven't been signed for on the remote commitment, are
properly restored after a restart.
2020-01-15 12:37:20 +01:00
Joost Jager
41c207e247
lnwallet/test: describe existing bug after restart with dangling remote updates 2020-01-06 15:30:23 +01:00
Joost Jager
b3bd470962
lnwallet: restore missing field in local log update
When restoring an htlc fulfill update from disk, the payment hash wasn't
restored previously.
2020-01-06 15:13:21 +01:00
Johan T. Halseth
9c3218c51e
lnwallet/channel: reuse derived SingleTweak on local force close
When creating the keyring, the tweak is already calculated in the remote
commitment case. We add the calculation also for our own commitment, so
we can use it in all cases without deriving the tweak.
2020-01-06 12:08:29 +01:00
Johan T. Halseth
3711597fef
input: remove duplicate commit weight constant 2020-01-06 12:08:25 +01:00
Johan T. Halseth
a56ed72bd7
lnwallet: use channel type to derive remote script
Based on the current channel type, we derive the script used for the
to_remote output. Currently only the unencumbered p2wkh type is used,
but that will change with upcoming channel types.
2020-01-06 12:08:19 +01:00
Johan T. Halseth
f92c7a3af0
lnwallet: nil single tweak when creating keyring
To make the channel state machine less concerned about the type of
commitment, we nil the local tweak when creating the keyring, depending
on the commitment type.
2020-01-06 12:08:09 +01:00
Johan T. Halseth
5e3718a1b5
lnwallet: use channel type to derive keys
We abstract away how keys are generated for the different channel types
types (currently tweak(less)).

Intention is that more of the logic that is unique for each commitment
type lives in commitment.go, making the channel state machine oblivious
to the keys and outputs being created on the commitment tx for a given
channel state.
2020-01-06 12:08:05 +01:00
Johan T. Halseth
4fde31229c
lnwallet: rename DelayKey->ToLocalKey, NoDelayKey->ToRemoteKey
Since both parties are going to have their ouputs delayed, we move way
from the DelayKey naming, and instead use ToLocalKey and ToRemoteKey.
2020-01-06 12:08:01 +01:00
Johan T. Halseth
7b9c54996b
lnwallet/commitment: clarify keyring key ownership 2020-01-06 12:07:56 +01:00
Johan T. Halseth
76ce51301e
lnwallet: return instead evaluated commitment instead of mutating
createCommitmentTx would earlier mutate the passed commitment struct
after evaluating the htlc view and calculating the final balances, which
was confusing since the balances are supposed to only be *after*
subtracting fees.

Instead we take the needed parameters as arguments, and return the final
balances, tx and fee to populate the commitment struct in a proper way.
2020-01-06 12:07:49 +01:00
Johan T. Halseth
613d771daf
lnwallet: create CommitmentBuilder
We define a new struct CommitmentBuilder that will be used to craft the
final commitment transaction based on the current active channel type.
2020-01-06 11:42:03 +01:00
Johan T. Halseth
13a108e578
lnwallet: make fundingTxIn not depend on LightningWallet 2020-01-06 11:42:03 +01:00
Johan T. Halseth
83e0d47ba3
lnwallet: move methods to commitment.go
PURE CODE MOVE:
Moving createCommitmentTx, CreateCommitTx, createStateHintObfuscator,
CommitmentKeyRing, DeriveCommitmentKeys, addHTLC, genHtlcScripts

We move the methods and structs to a new file commitment.go in
preparation for defining all the logic that is dependent on the channel
type in this new file.
2020-01-06 11:42:03 +01:00
Johan T. Halseth
fff9dbe6f3
lnwallet: pass chan cfgs to CreateCommitTx
Instead of passing delays and dustlimits separately, we pass the correct
channel config to CreateCommitTx from the POV of the local party that
owns the commit tx.

To make it more clear which commitment we are actually creating, we
rename variables to denote local and remote, to prepare for the case
when both outputs might be delayed.
2020-01-06 11:42:03 +01:00
Johan T. Halseth
1a4f81ed90
lnwallet: remove duplicate chanCfg fields, use channelState 2020-01-06 11:42:02 +01:00
Johan T. Halseth
e2b050aca3
lnwallet: make addHtlc non-LightningChannel method
It has no dependency on LightningChannel
2020-01-06 11:42:02 +01:00
Johan T. Halseth
f0019006a7
lnwallet: remove unused initiator param to CreateCooperativeCloseTx 2020-01-06 11:42:02 +01:00
Johan T. Halseth
2c46640dd0
channeldb+lnwallet: note that balance is after subtracting commit fee
It was incorrectly stated that the commitment balance was before
subctracting the commit fee, which led to some confusion.
2020-01-06 11:42:02 +01:00
Olaoluwa Osuntokun
7eacc40419
Merge pull request #3722 from Roasbeef/external-funding-rpc
lnrpc+lnwallet+funding: implement new RPCs to enable external channel funding
2019-12-23 14:41:46 -06:00
Matheus Degiovani
5dffa7da1c lnwallet: Re-enable tests
Tests were erroneously disabled in commit b1940d67.
2019-12-23 10:32:03 -03:00
Matheus Degiovani
02d616d9b7 lnwallet: Fix external funding test 2019-12-23 10:31:03 -03:00
Olaoluwa Osuntokun
bc176b5aa3
rpc+lnwallet: implement new FundingStateStep RPC method
In this commit, we implement the currently defined transition methods
for the new `FundingStateStep` method. At this point, we're now able to
serve the "responder" of the externally initiated channel funding flow
by being able to register and cancel a funding flow according to its
expected pending channel ID.
2019-12-20 19:09:44 -08:00
Conner Fromknecht
f3398c0c0e
Merge pull request #3789 from cfromknecht/coop-close-rpc-status
republish force and coop closes on startup
2019-12-05 10:35:53 -08:00
Conner Fromknecht
d9cf0396b3
peer+chancloser: mark coop broadcasted 2019-12-04 14:25:28 -08:00
carla
9b35c349de
multi: Set upfront shutdown from open and accept chanel messages
This commit gets upfront shutdown scripts from openchannel and
acceptchannel wire messages sent from our peer and sets upfront
shutdown scripts in our open and accept channel messages when
the remote peer supports option upfront shutdown and we have
the feature enabled.
2019-12-03 11:38:29 +02:00
carla
77222d8b69
channeldb: Add upfront shutdown script to OpenChannel
This commit adds fields for upfront shutdown scripts set
by the local and remote peer to the OpenChannel struct.
These values are optional, so they are added with their
own keys in the chanBucket in the DB.
2019-12-03 11:38:29 +02:00
carla
f86d63144c
multi: Set and check upfront shutdown address on close
This commit sets our close addresss to the address
specified by option upfront shutdown, if specified,
and disconnects from peers that fail to provide
their upfront shutdown address for coopertaive closes
of channels that were opened with the option set.
2019-12-03 11:38:29 +02:00
Olaoluwa Osuntokun
b1940d6779
lnwallet: fix bug in verifyFundingInputs skip dual funder tests for neutrino
In this commit, we fix a long standing bug within the newly created
`verifyFundingInputs` method. Before this commit, the method would
attempt to derive the pkScript by looking at the last items on the
witness stack, and making a p2wsh output script from that. This is
incorrect as typically non of these scripts will actually be p2wsh, and
instead will be p2wkh. We fix this by using the newly available
`txscript.ComputePkScript` method to derive the proper pkScript.

This resolves an issue w.r.t passing incorrect arguments for all
backends, but an issue still stands for the neutrino backend. As is, we
pass a height hint of zero into the `GetUtxo` method call. With the way
the current utxo scanner is set up for neutrino, this'll cause it to
never find the UTXO, as it takes the height hint as a UTXO birth height,
rather than a lower bound of the birth of the UTXO.
2019-12-02 17:12:05 -06:00
Olaoluwa Osuntokun
6b729ec9f5
lnwallet: break early in TestLightningWallet when a sub-test fails 2019-12-02 17:11:58 -06:00
Olaoluwa Osuntokun
c3a7da5ce7
lnwallet: add new test to exercise external channel funding 2019-12-02 17:11:54 -06:00