Commit Graph

1263 Commits

Author SHA1 Message Date
carla
2a3d1cb6fa
lnwallet/test: add tests for process fee update and add and remove 2020-05-03 14:10:33 +02:00
carla
3743fc6cf4
lnwallet/test: add unit test for evaluateHtlcView 2020-05-03 14:10:01 +02:00
carla
54a06cb96a
lnwallet: extract fetchparent for individual testing 2020-05-03 14:09:58 +02:00
Andras Banki-Horvath
556e3525ea misc: fix error formatting in multiple files 2020-04-24 19:15:08 +02:00
Andras Banki-Horvath
e9d7ba635c lnwallet: remove redundant return 2020-04-24 19:15:08 +02:00
Conner Fromknecht
89bd58786e
lnwallet/channel: enforce absolute fee floor of 250 sat/kw
This enforces the _actualized_ fee rate of the  commitment transaction,
rather than the fee floor used for estimation. The new value of 250
sat/kw corresponds to 1 sat/byte, rather than 253 which is only rounded
up during estimation to account for the fact that BOLT 3 rounds down to
the nearest satoshi and that the vbyte fee estimation is lossy.

Previously we would incorrectly fail to sign the next commitment even
though the fee was technically high enough. Restarting with this commit
should solve the issue as long as the channel hasn't already gone to
chain.
2020-04-21 12:37:34 -07:00
Conner Fromknecht
3ab5899853
lnwallet/channel: fix log typo 2020-04-20 22:12:49 -07:00
Conner Fromknecht
f2b6e2af04
input: pass input.Signature to multisig spend
Modifies SpendMultiSig to accept input.Signature, so that we can
ultimately assert the size of multisig witnesses.
2020-04-10 14:27:35 -07:00
Conner Fromknecht
0f94b8dc62
multi: return input.Signature from SignOutputRaw 2020-04-10 14:27:35 -07:00
Conner Fromknecht
37dffb225a
input: introduce Signature iface
This commit introduces the Signature interface which will be used by our
witness construction methods instead of passing in raw byte slices. This
will be used later to inject various kinds of mock signatures, e.g.
73-byte signatures for simulating worst-case witness weight.
2020-04-09 12:49:11 -07:00
Conner Fromknecht
2b2c8b5a10
lnwallet/interface_test: wait for bitcoind startup
Flakes locally for me on darwin.
2020-04-09 12:49:07 -07:00
Olaoluwa Osuntokun
173f7d88e0
Merge pull request #4121 from cfromknecht/sort-htlc-sigs
lnwallet: apply BIP69+CLTV tie-break to HTLC signature order
2020-04-03 18:12:58 -07:00
Conner Fromknecht
3f4dc0decd
lnwallet/channel: increase htlc validation strictness
This commit adds an additional santity check that rejects zero-value
HTLCs, preventing them from being added to the channel state even if the
channel config's minhtlc value is zero.
2020-04-02 18:03:06 -07:00
Conner Fromknecht
b0c3072ff7
lnwallet/channel_test: assert commit sorting of commit diff htlcs
This commit adds a test to exercise that HTLC signatures are sent in the
correct order, i.e. they match the sorting of the HTLC outputs on the
commitment after applying BOLT 3's BIP69+CLTV sort.
2020-04-02 17:51:02 -07:00
Conner Fromknecht
3ea3b1d0b5
lnwallet/channel: tie-break HTLCs by cltv when locating
This commit fixes #4118 by properly sorting the HTLC signatures sent
over the wire to match the BOLT3 BIP69+CLTV sorting of the commitment
outputs.

To do so, we expose the slice of cltv deltas for HTLCs on the unsigned
commitment after applying the commitment sorting. This will be used to
locate the proper output index, as the CLTV serves as a tie breaker
between HTLCs that otherwise have the same payment hash and amount.

Note that #3412 fixed the issue partially by ensuring the commitment was
constructed properly (and the second-level prev outpoint's txid was
correct), but failed to address that the HTLC signatures were still sent
out in the incorrect order. With this, we pass the test case introduce
in the next commit.
2020-04-02 17:51:02 -07:00
Conner Fromknecht
294e13eefc
lnwallet/commitment: split our/theirBalance comment 2020-04-02 17:51:02 -07:00
Conner Fromknecht
97761833d2
lnwallet/channel: populate htlc indexes from disk commit
We currently write each HTLCs OutputIndex to disk, but we don't use it
when restoring. The restoration is modified to use these directly, since
we will have lost access to the sorting of CLTVs after the initial
signing process.
2020-04-02 17:50:59 -07:00
Conner Fromknecht
9385b8cdc6
channeldb+lnwallet: move ActiveHtlcs calc to OpenChannel 2020-04-02 17:39:10 -07:00
Conner Fromknecht
422928b8a3
lnwallet/channel: remove unused RemoteCommitHeight method 2020-04-02 17:38:54 -07:00
Oliver Gugger
5a52420ab6
lnwallet+fundingmgr: interrupt funding flow for PSBT
In case the funding manager detects that a funding flow is requested
to be executed with the help of a PsbtIntent, the normal channel
negotiation with the remote peer is interrupted, as soon as the
accept_channel message was received. With the remote peer's funding
multisig key and our local key, we can derive the funding output
script and its address. This is enough to start the PSBT funding
and signing process which the user will do externally to the daemon.
2020-03-31 09:17:24 +02:00
Oliver Gugger
126f79dbb1
chanfunding: add PSBT assembler and intent
We add a new funding assembler and intent type that handle channel
funding through the use of a PSBT. The PsbtIntent is in itself a
simple state machine that can be stepped through the process of
assembling the required information for the funding output, verifying
a user supplied PSBT for correctness, accepting a fully signed PSBT
and then assembling the funding wire message.
2020-03-31 09:17:23 +02:00
Olaoluwa Osuntokun
1c398d5f26
Merge pull request #4078 from yyforyongyu/bitcoind-estimatemode
multi: support config bitcoind fee estimate mode
2020-03-26 16:21:17 -07:00
yyforyongyu
97da7b3444 multi: support config bitcoind fee estimate mode 2020-03-25 14:59:23 +08:00
Oliver Gugger
95a6796778
lnwallet/btcwallet: use fast scrypt options in itest 2020-03-24 09:52:40 +01:00
Olaoluwa Osuntokun
c85f6bb364
lnwallet: mark channel as frozen based on ShimIntent
In this commit, we make the internal channel funding flow aware of
frozen channels. We also update the testSingleFunderReservationWorkflow
method to ensure that the created channels have the proper type bit set.
2020-03-23 16:57:00 -07:00
Olaoluwa Osuntokun
8bce48d3cc
lnwallet/chanfunding: add new ThawHeight() method to ShimIntent+CannedAssembler
As frozen channels can only be created via the non-default channel
assembler, we extend both the ShimIntent and CannedAssembler to also
accept and expose this new channel status along with the thaw height.
2020-03-23 16:56:57 -07:00
Johan T. Halseth
c1d00a0c9b
Merge pull request #4101 from ErikEk/typo_fixes_trivial
trivial: typo fixes
2020-03-19 21:36:38 +01:00
ErikEk
4e47181b99 trivial: typo fix 2020-03-19 05:43:49 +01:00
Olaoluwa Osuntokun
98170e00ef
lnwallet: convert to use new kvdb abstraction 2020-03-18 19:35:13 -07:00
Johan T. Halseth
dc6c4637b6
lnwallet+channeldb: add anchor resolutions
Co-authored-by: Joost Jager <joost.jager@gmail.com>
2020-03-17 14:19:35 +01:00
Joost Jager
30fc03d84d
lnwallet/test: pass in test channel type 2020-03-17 14:19:33 +01:00
Olaoluwa Osuntokun
de2fefe52a
lnwallet+lncfg: fix typos 2020-03-16 17:07:21 -07:00
Olaoluwa Osuntokun
3dda93e30d
Merge pull request #3821 from halseth/pluggable-anchors-lnwallet
[anchor] pluggable anchor commitments
2020-03-09 19:49:05 -07:00
Johan T. Halseth
b7885dbbae
lnwallet+size: select HTLC fees based on channel type 2020-03-09 12:59:35 +01:00
Johan T. Halseth
ea2a58e80f
fundingmanager+lnwallet: enable anchor commitments
If both nodes are signalling the feature, make all opened channels using
this type.
2020-03-09 12:59:35 +01:00
Johan T. Halseth
f95a82bf5f
lnwallet+funding: create CommitmentType enum 2020-03-09 12:59:34 +01:00
Johan T. Halseth
8741b93723
lnwallet/reservation: add non-initiator balance check
If we are the initiator, we check that our starting balance after
subtracting fees are not less than two times the default dust limit.

This commit adds a similar check for the non-initiator case, checking
that the remote party has a starting balance of reasonable size.
2020-03-09 12:59:34 +01:00
Johan T. Halseth
ad8e9f30c6
lnwallet+breacharbiter: record local csv delay 2020-03-09 12:59:34 +01:00
Johan T. Halseth
92af2342da
lnwallet+nursery+input: set sequence=1 for direct HTLC spends 2020-03-09 12:59:33 +01:00
Johan T. Halseth
c5d58b4762
lnwallet: set 2nd level sequence according to channel type 2020-03-09 12:59:33 +01:00
Johan T. Halseth
bddd3e128c
lnwallet: make second level sigs using sighash single|anyonecanpay 2020-03-09 12:59:33 +01:00
Johan T. Halseth
6810912c86
lnwallet: choose HTLC scripts based on channel type 2020-03-09 12:59:33 +01:00
Johan T. Halseth
21c5a957bc
lnwallet/channel: add feerate sanity check 2020-03-09 12:59:22 +01:00
Johan T. Halseth
ea94dbbe34
input+lnwallet: use individual commit weight calculations for channel type
Based on the channel type, the commitment weight will be calculated.
2020-03-09 12:10:59 +01:00
Johan T. Halseth
af68ff1640
lnwallet: add anchor commitmenttype
With this commitment type, we'll add extra anchor outputs to the
commitment transaction if the anchor channel type is active.
2020-03-09 12:10:59 +01:00
Johan T. Halseth
8c0deb81c2
input+lnwallet: Add scripts for CSV delayed HTLC outputs
We also increase the witness size for these types to account for the 3
extra bytes. The size won't be correct in all cases, but it is just an
upper bound in any case.
2020-03-09 12:10:58 +01:00
Johan T. Halseth
6ecb379088
lnwallet: thread chanType down into genHtlcScript, gen[..]SigJobs,
create[..]Tx

NO FUNCTIONAL CHANGES
This is a commit just supplying the channel types to various methods.
2020-03-09 12:10:58 +01:00
Johan T. Halseth
865776c776
lnwallet/channel: use genHtlcScript to create scripts
It takes into account the necessary variables and will prepare us for
doing commitment type dependent script generation later.
2020-03-09 12:10:57 +01:00
Conner Fromknecht
4c2bc7bc79
lnwallet+input: move size_test.go to input pkg 2020-03-04 08:01:37 -08:00
Conner Fromknecht
4c402ab9d4
lnwallet/size_test: refactor and expand unit tests 2020-03-04 08:00:48 -08:00
Conner Fromknecht
be74d94c48
lnwallet/size_test: add test exercising nested input count bug
This commit modifies the NP2WKH and NP2WSH input tests to ensure the
input count is properly incremented and accounted for in the size
estimate. 253 is chosen because it is the lowest value that, when
serialized, occupies more than one byte on the wire.
2020-03-04 08:00:09 -08:00
carla
d3cb6ad869
channeldb: store close initiator status
This commit adds two new channel statuses which indicate the party that
initatited closing the channel. These statuses are set in conjunction
with the existing commit broadcast status so that we do not need to
migrate existing logic to handle multiple types of closes. This status
is set for locally initiated force closes in this commit because they
follow a similar pattern to cooparative closes, marking the commitment
broadcast then proceeding with tx broadcast. Remote force closes are
added in the following commit, as they are handled differently.
2020-02-21 13:33:49 +02:00
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
Olaoluwa Osuntokun
9926259da0
lnwallet: add new RegisterFundingIntent method
In this commit, we add a new method `RegisterFundingIntent` that allows
a caller to "inject" a pre-populated chanfunding.Intent into a funding
workflow. As an example, if we've already agreed upon the "shape" of the
funding output _outside_ the protocol, then we can use this to pass down
the details of the output, then leverage the normal wire protocol to
carry out the remainder of the funding flow.
2019-12-02 17:11:51 -06:00
Olaoluwa Osuntokun
6e9cbc19f9
lnwallet+funding: pass the pending channel ID into the reservation context
In this commit, we start to thread the pending channel ID from wire
protocol all the way down into the reservation context. This change will
allow negotiation to take place _outside_ the protocol that may result
in a particular chanfunding.Assembler being dispatched.
2019-12-02 17:11:46 -06:00
Olaoluwa Osuntokun
c3157ae2c4
lnwallet: add awareness of chanfunding.ShimIntents
In this commit, we make the wallet aware of the second type of funding
intent: the ShimIntent. If we have one of these, then we don't need to
construct the funding transaction, and can instead just obtain the
outpoint directly from it.
2019-12-02 17:11:41 -06:00
Olaoluwa Osuntokun
7a64a7d3a4
lnwallet: delegate all channel funding logic to the new chanfunding package
In this commit, we begin to integrate the new channel funding package
into the existing codebase. With this set of changes, we'll no longer
construct and sign the funding transaction within this package, instead
delegating it to the new chanfunding package. We use the new
chanfunding.WalletAssembler to carry out all channel funding, providing
it with an implementation of all its interfaces backed by the wallet.
2019-12-02 17:11:36 -06:00
Olaoluwa Osuntokun
d422ebbc66
lnwallet/chanfunding: introduce new channel funding abstractions
In this commit, we introduce a series of new abstractions for channel
funding. The end goal is to enable uses cases that construct the funding
transaction externally, eventually handing the funding outpoint to lnd.
An example of such a use case includes channel factories and external
channel funding using a hardware wallet.

We also add a new chanfunding.Assembler meant to allow external channel
funding in contexts similar to how channel factories
can be constructed. With this channel funder, we'll only obtain the
channel point and funding output from it, as this alone is enough to
carry out a funding flow as normal.
2019-12-02 17:11:32 -06:00
Olaoluwa Osuntokun
4e955dfac6
lnwallet: remove unused openChanDetails struct
We also remove some related and also unused attributes as well along the
way.
2019-12-02 17:11:29 -06:00
Olaoluwa Osuntokun
9eefdef262
chanfunding+lnwallet: move coin selection code into new chanfunding package
In this commit, we make an incremental change to move the existing coin
selection code into a new chanfunding package. In later commits, this
package will grow to serve all the lower level channel funding needs in
the daemon.
2019-12-02 17:11:25 -06:00
Wilmer Paulino
9587a2259f
lnwallet: fix test inconsistencies to support bitcoind 0.19.0
bitcoind's sendrawtransaction API in v0.19.0 now enforces a maximum fee
rate of 0.1 BTC/kb and valid output scripts.
2019-11-12 20:34:37 -08:00
Olaoluwa Osuntokun
86bed393f9
Merge pull request #2927 from joostjager/hodl-drop-fix-better
htlcswitch: fix empty commit sig and no commit sig
2019-11-08 17:16:48 -08:00
Joost Jager
c7fad2d7cf
lnwallet: fix loop binding bug 2019-11-07 11:45:06 +01:00
Joost Jager
03b32d046a
htlcswitch+lnwallet: replace updateNeeded by check on channel itself
Instead of tracking local updates in a separate link variable, query
this state from the channel itself.

This commit also fixes the issue where the commit tx was not updated
anymore after a failed first attempt because the revocation window was
closed. Also those pending updates will be taken into account when the
remote party revokes.
2019-11-06 09:21:25 +01:00
Joost Jager
f59b4d62bf
htlcswitch: check for signature owed in link
Previously the channel method FullySynced was used to decide whether to
send a new commit sig message. However, it could happen that FullySynced
was false, but that we didn't owe a commitment signature. Instead we
were waiting on the other party to send us a signature. If that
happened, we'd send out an empty commit sig. This commit modifies the
condition that triggers a new commit sig and fixes this deviation from
the spec.
2019-11-06 09:21:23 +01:00
Joost Jager
517ad4e4f5
lnwallet: log empty commit sig event
To facilitate the logging, this commit adds a new OweCommitment method.
For the logging, we only need to consider the remote perspective. In a
later commit, we'll also start using the local perspective to support
the decision to send another signature.
2019-11-06 09:21:19 +01:00
Olaoluwa Osuntokun
4592f87033
Merge pull request #3653 from Roasbeef/external-funding-chainfees
chainfees: create new chainfees package extracting fees from lnwallet
2019-10-31 17:44:00 -07:00
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
Olaoluwa Osuntokun
a73ee28e46
multi: convert the existing channeldb.ChannelType uint8 into a bit field
In this commit, we convert the existing `channeldb.ChannelType` type
into a _bit field_. This doesn't require us to change the current
serialization or interpretation or the type as it is, since all the
current defined values us a distinct bit. This PR lays the ground work
for any future changes that may introduce new channel types (like anchor
outputs), and also any changes that may modify the existing invariants
around channels (if we're the initiator, we always have the funding
transaction).
2019-10-31 16:34:37 -07:00
Conner Fromknecht
dbc0e88584
Merge pull request #3564 from joostjager/htlcswitch-logging
build+htlcswitch+lnwallet: add prefix logger
2019-10-16 13:00:36 +02:00
Olaoluwa Osuntokun
5ef1f85998
Merge pull request #3578 from wpaulino/no-freelist-sync-option
config: add sync freelist cli flag
2019-10-04 15:16:30 -07:00
Olaoluwa Osuntokun
c03fb8aca0
Merge pull request #3561 from Roasbeef/chan-validation-cleanup
chanvalidate: create new channel validation package
2019-10-04 12:32:07 -07:00
Wilmer Paulino
194a9dea81
multi: support sync freelist option within btcwallet 2019-10-04 12:19:40 -04:00
Johan T. Halseth
6765b8668a
Merge pull request #3574 from wpaulino/max-fee-allocation-fee-floor
htlcswitch: enforce fee floor on max fee allocation
2019-10-04 14:12:02 +02:00
Wilmer Paulino
fa96d707c5
lnwallet: enforce fee floor on max fee allocation
Without this, it was possible for a combination of our balance and max
fee allocation to result in a fee rate below the fee floor causing the
remote party to reject the update and close the channel.
2019-10-03 20:13:26 -04:00
Olaoluwa Osuntokun
0e13c5ac3f
lnwallet+funding: expose new ValidateChannel method for 1st party validation
In this commit, we use the recently added `chanvalidate` package to
verify channels once they have been confirmed in the funding manager. We
expose a new method on the `LightningWallet` struct: `ValidateChannels`
which calls the new shared 1st party verification code.

After the channel is fully confirmed in the funding manager, we'll now
use this newly exposed method to handle all validation. As a result, we
can remove the existing validation code in the funding manager, and rely
on the new code in isolation.
2019-10-03 16:23:23 -07:00
Olaoluwa Osuntokun
c199ad30ac
lnwallet/chanvalidate: create new channel validation package
In this commit, we create a new `chanvalidate` package which it to house
all logic required for 1st and 3rd party channel verification. 1st party
verification occurs when we find a channel in the chain that is
allegedly ours, while 3rd party verification will occur when a peer
sends us a channel proof of a new channel.

In the scope of the recent CVE, we actually fully verified 3rd party
channels, but failed to also include those checks in our 1st party
verification code. In order to unify this logic, and prevent future
issues, in this PR we move to concentrate all validation logic into a
single function. Both 1st and 3rd party validation will then use this
function. Additionally, having all the logic in a single place makes it
easier to audit, and also write tests against.
2019-10-03 16:23:14 -07:00
Olaoluwa Osuntokun
1e67040145
lnwallet: copy commitment transaction in getSignedCommitTx
In this commit, we move to make a full deep copy of the commitment
transaction in `getSignedCommitTx` to ensure that we don't mutate the
commitment on disk, possibly resulting in a "hot commitment".
2019-10-03 16:23:10 -07:00
Joost Jager
b58dbb2d70
multi: fix canceled spelling 2019-10-03 17:27:36 +02:00
Joost Jager
57562d6c4d
lnwallet: create channel specific log methods 2019-10-03 10:22:01 +02:00
Olaoluwa Osuntokun
6d97bcbacd
lnwallet+contractcourt: publicly export DeriveCommitmentKeys use in chain watcher
In this commit, we consolidate the number of areas where we derive our
commitment keys. Before this commit, the `isOurCommitment` function in
the chain watcher used a custom routine to derive the expected
scripts/keys for our commitment at that height. With the recent changes,
we now have additional logic in `DeriveCommitmentKeys` that wasn't
copied over to this area. As a result, the prior logic would erroneously
detect if it was our commitment that had hit the chain or not.

In this commit, we remove the old custom code, and use
`DeriveCommitmentKeys` wihtin the chain watcher as well. This ensures
that we only need to maintain the key derivation code in a single place,
preventing future bugs of this nature.
2019-09-25 18:26:13 -07:00
Olaoluwa Osuntokun
a58cfa65ff
lnwallet+breacharbiter: update breach logic to be aware of new commitment format
In this commit, we update the brar logic in the channel state machine,
and also the brar itself to be aware of the new commitment format.
Similar to the unilateral close summary, we'll now blank out the
SingleTweak field in `NewBreachRetribution` if it's a tweakless
commitment. The brar will then use this to properly identify the
commitment type, to ensure we use the proper witness generation function
when we're handling our own breach.
2019-09-25 18:25:58 -07:00
Olaoluwa Osuntokun
0b62126067
multi: update funding workflow to be aware of new tweakless commits
In this commit, we update the funding workflow to be aware of the new
channel type that doesn't tweak the remote party's output within the
non-delay script on their commitment transaction. To do this, we now
allow the caller of `InnitChannelReservation` to signal if they want the
old or new (tweakless) commitment style.

The funding tests are also updated to test both funding variants, as
we'll still need to understand the legacy format for older nodes.
2019-09-25 18:25:46 -07:00
Olaoluwa Osuntokun
b399203e71
lnwallet: update channel state machine to be aware of tweakless commits
In this commit, we update the channel state machine to be aware of
tweakless commits. In several areas, we'll now check the channel's type
to see if it's `SingleFunderTweakless`. If so, then we'll opt to use the
remote party's non-delay based point directly in the script, skipping
any additional cryptographic operations. Along the way we move the
`validateCommitmentSanity` method to be defined _before_ it's used as is
cutomary within the codebase.

Notably, within the `NewUnilateralCloseSummary` method, we'll now _blank
out_ the `SingleTweak` value if the commitment is tweakless. This
indicates to callers the witness type they should map to, as the value
isn't needed at all any longer when sweeping a non-delay output.

We also update the signing+verification tests to also test that we're
able to properly generate a valid witness for the new tweakless
commitment format.
2019-09-25 18:25:43 -07:00
Johan T. Halseth
2a6ad6e634
channeldb+lnwallet: don't pass isRestoredChan to ChanSyncMsg
Since we have access to the internal state of the channel, we can
instead get it directly instead of passing it in as a parameter.
2019-09-25 14:04:44 +02:00
Johan T. Halseth
6e361d04cf
lnwallet+link: move marking channel states to link
Instead of marking the database state when processing the channel
reestablishment message, we wait for the result of this processing to
arrive in the link, and mark it accordingly in the database here.

We do this move the logic determining whether we should force close the
channel or not, and what state to mark it in the DB, to the same place,
as these need to be consistent.
2019-09-25 14:04:43 +02:00
Johan T. Halseth
f40f4620f7
lnwallet/channel: make ErrCommitSyncLocalDataLoss type
This commit converts the ErrCommitSyncLocalDataLoss error into a struct,
that also holds the received last unrevoked commit point from the remote
party.
2019-09-25 14:04:43 +02:00
Johan T. Halseth
07a42971bf
lnwallet/test_utils: make CreateTestChannel return random funding op
Previously it would always be the same, resulting in multiple calls to
the method not being usabel to create more than one set of channels.
2019-09-25 14:04:43 +02:00
Johan T. Halseth
02b2787e44
multi: make MarkCommitmentBroadcasted take closeTx 2019-09-25 14:04:43 +02:00
Johan T. Halseth
eb1b84c0b4
channeldb+lnwallet: make ChanSyncMsg method on OpenChannel 2019-09-25 14:04:42 +02:00
Johan T. Halseth
0122dda88a
channeldb/channel: remove unused FullSync method
The exported FullSync method is only used by test code, so we remove it
and instead use SyncPending.
2019-09-25 14:04:42 +02:00
Johan T. Halseth
2e9452916e
lnwallet/interface_test: add RBF test cases to testPublishTransaction
Checks that we get ErrDoubleSpend as expected when publishing a
conflicting mempool transaction with the same fee as the existing one,
and that we can publish a replacement with a higher fee successfully.
2019-09-25 08:04:04 +02:00
Johan T. Halseth
61e1b48f57
lnwallet/btcwallet: check publication error types, handle replacement
error

Since btcwallet will return typed errors now, we can simplify the
matching logic in order to return ErrDoubleSpend.

In case a transaction cannot be published since it did not satisfy the
requirements for a valid replacement, return ErrDoubleSpend to indicate
it was not propagated.
2019-09-25 08:04:04 +02:00
Johan T. Halseth
7897b96e6a
lnwallet/interface_test: extract local utility functions
In preparation for extending the testPublishTransaction test, shorten it
by moving utility methods out of the local scope.
2019-09-25 08:01:42 +02:00
Conner Fromknecht
934b11fdac
Merge pull request #3509 from alrs/fix-lnwallet-test-goroutine
lnwallet: fix goroutines in tests
2019-09-19 14:01:45 -07:00
Lars Lehtonen
a600d1eefe lnwallet: fix in-goroutine tests 2019-09-19 19:49:45 +00:00
Johan T. Halseth
c308042ae0
lnwallet/channel: add missing chanpoint to log 2019-09-19 10:40:32 +02:00
Johan T. Halseth
1a4ba97562
Merge pull request #3274 from esneider/fix-typo-in-doc
Fix typo in doc
2019-09-18 08:37:06 +02:00
Olaoluwa Osuntokun
7b1166bbb7
Merge pull request #3458 from Roasbeef/go1.13
build: update travis and Makefile to build using Go 1.13
2019-09-14 11:18:51 +03:00
Lars Lehtonen
3b29ecb921 routing: Fix dropped errors in tests.
lnd: Fix dropped errors in tests.

contractcourt: Fix dropped errors in tests.

htlcswitch: Fix dropped errors in tests.

invoices: Fix dropped error in tests.

lnwallet: Fix dropped errors in tests.

macaroons: Fix dropped error in tests.
2019-09-13 06:28:05 +00:00
Olaoluwa Osuntokun
5ecde6d552
lnwallet+chainntnfs: update to use latest neutrino APIs 2019-09-11 05:57:06 -07:00
Joost Jager
3d7de2ad39
multi: remove dead code 2019-09-10 17:21:59 +02:00
Wilmer Paulino
59d19e0ca9
lnwallet: add MaxFeeRate method to LightningChannel 2019-09-03 16:49:54 -07:00
Wilmer Paulino
9e8a1707cc
lnwallet: modify FetchInputInfo to return additional information for utxos 2019-08-22 13:49:41 -07:00
Wilmer Paulino
c7bdfe149a
lnwallet/btcwallet: remove internal utxoCache
The cache wasn't really serving a purpose as FetchInputInfo isn't known
to be a hot path. Also, with a planned addition of returning the
confirmation status of an output within FetchInputInfo in a later
commit, caching won't be useful as we'll have to go to disk anyway to
determine the confirmation status.
2019-08-22 13:49:39 -07:00
Wilmer Paulino
a9efb61767
lnwallet: remove irrelevant fields in Utxo struct
These fields are only relevant for spent transaction outputs.
2019-08-22 13:49:38 -07:00
Olaoluwa Osuntokun
cc4daa04ad
lnwallet: when signing create account if not found
In this commit, we address an edge case that can happen a user rescans
w/ their seed, while retaining their existing `channel.db`. Once they
rescan, if they go to sign for a channel sweep for example, the
commitment key family (actually an account) may not yet have been
created, causing the signing attempt to fail.

We remedy this always creating the account if we go to sign, and the
account isn't found. The change has been structured to make this the
exception, so we'll avoid always needing to do 2 DB hits (check if
account exists, sign), each time we sign.

A new test has been added to exercise this behavior. If the diff from
the `signer.go` file is removed, then the test will fail.
2019-08-20 19:08:03 -07:00
Johan T. Halseth
b9816259cb
fundingmanager+server: define subtractFees
Let one initiate a funding request with the remaining funds in the
wallet.
2019-07-18 00:58:12 +02:00
Johan T. Halseth
f15d81426c
lnwallet/wallet: define SubtractFees for InitFundingReserveMsg
This commit adds a SubtractFees option to the funding request, letting
the caller specify that the fees should be deducted from the funding
amount. This paves the way for letting the funding manager spend up to a
given amount when creating a channel, like the rest of the funds in the
wallet.
2019-07-18 00:33:15 +02:00
Johan T. Halseth
4239f7d600
lnwallet/wallet: add coinSelectSubtractFees 2019-07-18 00:33:15 +02:00
Johan T. Halseth
1b2297c2b5
lnwallet/wallet: extract contribution setup into initOurContribution
This lets us easily call unlock() in case contribution setup fails.
2019-07-18 00:33:15 +02:00
Johan T. Halseth
44384a1b5b
lnwallet: move coin selection before ChannelReservation
Now that coin selection is independent of creating the channel
reservation, we can move it first, in preparation for doing custom coin
selection.
2019-07-18 00:33:14 +02:00
Johan T. Halseth
98a3d04ba3
lnwallet: make selectCoinsAndChange return selected coins
This makes the method independent of the ChannelContribution struct.

We also add a function closure to the return of selectCoinsAndChange,
that let is unlock the selected output in case of error.
2019-07-18 00:33:14 +02:00
Johan T. Halseth
fcf74debe6
lnwallet+funding: rename Capacity and FundingAmt
Instead use LocalFundingAmt and RemoteFundingAmt to make it clear who is
contributing funds.
2019-07-18 00:33:14 +02:00
Johan T. Halseth
2f5c1a69fb
lnwallet test: add TestCoinSelect 2019-07-18 00:33:14 +02:00
Yaacov Akiba Slama
fe2a565bec Add test for unmined transaction DestAddresses
Co-authored-by: Christopher Coverdale <chris.coverdale24@gmail.com>
2019-07-10 09:39:46 +03:00
Yaacov Akiba Slama
f33df0928d Fill DestAddresses in unmined transactions 2019-07-10 09:38:27 +03:00
Olaoluwa Osuntokun
19ff8f2c1b
Merge pull request #3280 from Roasbeef/derive-first-empty-key-loc
lnwallet: fix key derivation for very first key in family
2019-07-08 21:53:40 -07:00
Conner Fromknecht
933e723ec7
Merge pull request #3178 from federicobond/once-refactor
multi: replace manual CAS with sync.Once in several more modules
2019-07-08 20:33:44 -07:00
Olaoluwa Osuntokun
bd46491d07 lnwallet: fix key derivation for very first key in family
In this commit, we fix an existing bug that would cause us to be unable
to derive the very first key in a key family if the wallet hadn't
already derived it in the past. This can happen if a user keeps their
same `channel.db`, but restores their wallet resulting in fresh
`wallet.db` state.

This is an existing issue due to the fact that we don't properly
distinguish between an empty key locator, and the very first key in a
`KeyFamily`: `(0, 0)`. Atm, `KeyLoactor{0, 0}.IsEmpty() == True`,
causing us to be unable to retrieve this key in certain cases since we
fall through and attempt address based derivation.

In order to remedy this, we add a new special case (until we upgrade
`KeyLoactor` formats, but needed for legacy reasons) to _try_ a regular
`KeyLoactor` based derivation if we fail to derive via address, and this
is an "empty" key loc. This has been tested in the field and shown to
work, with the one downside that in this "hot swap restoration" case,
we'll hit the database twice to derive the key.
2019-07-08 17:08:39 -07:00
esneider
66b5574f4c Fix typo in doc 2019-07-05 19:40:04 -03:00
Olaoluwa Osuntokun
2012b5dc1a
lnwallet: fix logic in testCreateSimpleTx test case
In this commit, we fix a logic flaw in the testCreateSimpleTx test case
which emerged once we the bug fix for dust outputs landed. Before this
commit, we would erroneously fail during valid test execution.
2019-06-18 19:55:24 -07:00
Olaoluwa Osuntokun
eaa043f585 lnwallet/btcwallet: use relay fee not tx fee rate for dust check
In this commit we fix a hidden bug in the transaction creating logic
that was only manifested recently due to higher fees on Bitcoin's
mainnet. Before this commit, we would use the target fee rate to
determine if an output was dust or not. However, this is incorrect, as
instead the relay fee should be used as this matches the policy checks
widely deployed in Bitcoin full node today.

To fix this issue we now properly use the relay fee when computing dust.
This fixes the issue for the `EstimateFee` call, but the `SendOutputs`
call also has a similar issue. However, this must be fixed within
`btcwallet` itself, so it has been left out of this commit

Fixes #3217.
2019-06-18 19:55:16 -07:00
Johan T. Halseth
7df7449c47
Merge pull request #3187 from yaslama/UnknownAsDefaultAddressType
Use UnknownAddressType value as default in lnwallet.AddressType
2019-06-17 12:18:55 +02:00
Johan T. Halseth
f63c5d0170
Merge pull request #3182 from yaslama/addressTypeInitialization
Initialize addressType to UnknownAddressType
2019-06-14 10:32:01 +02:00
Olaoluwa Osuntokun
e50339d44b
lnwallet/btcwallet: also include raw tx hex for unconf txns
In this commit, we patch a small bug in the newly added raw tx hex field
for ListTransactions. We now ensure that we also set the raw tx hex
field for unconfirmed transactions.
2019-06-13 13:54:33 -07:00
Federico Bond
0a9141763e multi: replace manual CAS with sync.Once in several more modules 2019-06-12 09:37:26 -03:00
Yaacov Akiba Slama
a6d1d2435b Use UnknownAddressType value as default in lnwallet.AddressType 2019-06-11 10:16:43 +03:00
Yaacov Akiba Slama
bbaf37b7d2 Initialize addressType to UnknownAddressType 2019-06-10 15:22:17 +03:00
Olaoluwa Osuntokun
eaf86cc4f9
lnwallet: add raw tx hex attribute to ListTransactionDetails 2019-06-07 07:36:32 -07:00
Conner Fromknecht
b26b88a1e2
lnwallet/channel: use proper commitment output sorting 2019-06-05 08:35:06 +02:00
Conner Fromknecht
a627c65d65
lnwallet/commit_sort: add commit sorting with htlc tie breaker 2019-06-05 08:34:45 +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
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
138d9b68f0
lnwallet+sweep: add String method to FeePreference 2019-05-24 15:30:36 -07:00
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
Conner Fromknecht
f79a9d97a9
Merge pull request #3068 from AdamISZ/commentfixes1
Typo corrections in various comments
2019-05-14 17:02:44 -07:00
AdamISZ
6e054886d8 Typo corrections in various comments 2019-05-10 17:15:54 +02:00
Johan T. Halseth
f589c86963
lnwallet/wallet: add missing error handling 2019-05-09 14:44:53 +02:00
Johan T. Halseth
6110182371
lnwallet/btcwallet: provide cancel chan as neutrino QuitChan option
This will make sure a long-running rescan can be canceled in case
Neutrino is the backend.
2019-05-09 14:44:52 +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
Unknown
16aad1a9ee lnwallet+chainregistry: remove unused FeeEstimator from wallet cfg 2019-04-16 14:16:56 -07:00
Olaoluwa Osuntokun
c6b653457b lnwallet: add new WebApiFeeEstimator for API fee estimation.
Co-authored-by: Valentine Wallace <vwallace@protonmail.com>
2019-04-16 14:16:53 -07:00
Valentine Wallace
4944eb3e54 lnwallet: add implementation of WebApiFeeSource for external APIs
This enables users to specify an external API for fee estimation.
The API is expected to return fees in the JSON format:
`{
	fee_by_block_target: {
	   a: x,
	   b: y,
	   ...
	   c: z
        }
 }`
 where a, b, c are block targets and x, y, z are fees in sat/kb.
 Note that a, b, c need not be contiguous.
2019-04-16 13:50:40 -07:00
Olaoluwa Osuntokun
9b8549011c lnwallet: add new WebApiFeeSource interface
In this commit, we add a new interface which will allow callers to drop
in an arbitrary Web API for fee estimation with an arbitrary
request/response schema.

Co-authored-by: Valentine Wallace <vwallace@protonmail.com>
2019-04-16 13:50:40 -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
4ff4e1b0de
lnwallet: account for case where remote party has 2 unrevoked commits in DLP 2019-03-28 17:53:55 -07:00
Olaoluwa Osuntokun
fc8337b146
lnwallet: send invalid commitment secret if restored chan in ChanSyncMsg
In this commit, we modify the `ChanSyncMsg` to send an invalid
commitment secret in `ChanSyncMsg`. We do this in order to force the
remote party to force close off-chain, if we're restoring a channel from
scratch and we never had any state updates within the channel. We need
to do this, as otherwise the remote party will think we can resume as
they're able to verify their own commit secret for state zero.
2019-03-28 17:53:54 -07:00
Olaoluwa Osuntokun
3e866c6cc5
lnwallet: add additional comment for case in ProcessChanSyncMsg 2019-03-28 17:53:53 -07:00
Olaoluwa Osuntokun
90d8a46ec6
lnwallet: allow DLP trigger transition in ProcessChanSyncMsg if chan restored
In this commit, we modify an existing case in `ProcessChanSyncMsg` to enter the DLP workflow if we detect that this is a restored channel.
2019-03-28 17:53:51 -07:00