Commit Graph

841 Commits

Author SHA1 Message Date
Olaoluwa Osuntokun
6cd210041d
lnwallet: assert that no chan sync is needed before updates in TestChanSyncFullySynced 2017-11-16 20:00:05 -08:00
Olaoluwa Osuntokun
94ffb07b90
lnwallet: ensure created channels are stopped in ChanSync tests 2017-11-16 20:00:04 -08:00
Olaoluwa Osuntokun
a655396616
lnwallet: add optional data loss support to ChanSyncMsg()
In this commit we extend the set of fields populated within the
returned lnwire.ChannelReestablish to populate the optional data loss
fields. This entails included the commitment secret of the most
recently revoked remote commitment transaction and also our current
unrevoked commitment point.
2017-11-16 20:00:04 -08:00
Olaoluwa Osuntokun
d7cdf822e3
lnwallet: update commitmentKeyRing to account for distinct HTLC keys
In this commit, we update all the key derivation within the state
machine to account for the recent spec change which introduces a
distinct key for usages within all HTLC scripts. This change means that
the commitment payment and delay base points, are only required to be
online in the case that a party is forced to go to chain.

We introduce an additional local tweak to the keyring for the HTLC
tweak. Additionally, two new keys have been added: a local and a remote
HTLC key. Generation of sender/receiver HTLC scripts now use the local
and remote HTLC keys rather than the “payment” key for each party.
Finally, when creating/verifying signatures for second-level HTLC
transactions, we use these the distinct HTLC keys, rather than re-using
the payment keys.
2017-11-16 20:00:03 -08:00
Olaoluwa Osuntokun
a812974808
lnwallet: update sender/receiver HTLC scripts to use distinct HTLC keys
In this commit, we modify the naming and comments of the routines that
create the sender/receiver HTLC scripts to denote that a set of
distinct keys are used. The scripts materially haven’t changed, but the
set of keys expected has.
2017-11-16 20:00:02 -08:00
Olaoluwa Osuntokun
8b0de51003
lnwallet: populate our HtlcBasePoint when reserving a funding reservation 2017-11-16 20:00:01 -08:00
Conner Fromknecht
35e3201097
lnwallet/script_utils: adds public HtlcSpendSuccess witness func 2017-11-15 18:08:33 -08:00
Conner Fromknecht
305acb86d0
lnwallet/size: adds htlc success and timeout witness sizes 2017-11-15 18:04:44 -08:00
Conner Fromknecht
7888c6e040
lnwallet/witnessgen: add HtlcOfferedTimeLock witness type 2017-11-15 18:04:44 -08:00
Olaoluwa Osuntokun
e7e426a1cc
Merge pull request #398 from halseth/sighash-signdesc-hashtype
Use dynamic SigHash type when signing transactions.
2017-11-11 17:30:54 -08:00
Alex
9bc25df906 lnwallet: fix linter complaints re. capitalization in interface test 2017-11-11 17:24:48 -08:00
Alex
7b43c9a750 lnwallet: add timeout and more accurate check to reorg interface test 2017-11-11 17:24:48 -08:00
Olaoluwa Osuntokun
b6f64932c2
htlcswitch: face race condition in unit tests by returning invoice
In this commit we modify the primary InvoiceRegistry interface within
the package to instead return a direct value for LookupInvoice rather
than a pointer. This fixes an existing race condition wherein a caller
could modify or read the value of the returned invoice.
2017-11-11 16:09:29 -08:00
Olaoluwa Osuntokun
010815e280
lnwallet: no need to grab mutex in ProcessChanSyncMsg as is init method
In this method we fix an existing deadlock within the unit tests when
running with the race condition detector on. We don’t need to grab the
mutex within the ProcessChanSyncMsg method as this should be the very
first method called when initializing the channel if a channel state
sync is needed.
2017-11-11 15:50:33 -08:00
Olaoluwa Osuntokun
861412529d
lnwallet: add select on quit when waiting for job from sigPool
In this commit we ensure that the channel is always able to exit by
adding a select statement with a quit case when we’re waiting on the
result of a job that was previously sent into the sigPool.
2017-11-11 15:00:50 -08:00
Olaoluwa Osuntokun
03ba13fcf8
lnwallet: ensure sigPool goroutines can always exit 2017-11-11 14:59:56 -08:00
Olaoluwa Osuntokun
3f4b1592a3
lnwallet: add logging error message is unable to carry HTLC in state machine 2017-11-10 19:51:13 -08:00
Olaoluwa Osuntokun
1734f96544
lnwallet: add a set of unit tests to exercise the various ChanSync cases
In this commit, we’ve added a set of unit tests to cover all enumerated
channel sync scenarios, including the case where both nodes deem that
they’re unable to synchronize properly.
2017-11-10 19:51:01 -08:00
Olaoluwa Osuntokun
08c7fd9b4d
lnwallet: extend TestStateUpdatePersistence to assert proper htlc counters 2017-11-10 19:51:00 -08:00
Olaoluwa Osuntokun
32651e9311
lnwallet: revert commit 5240953de02d281be694b2c87d151d6c7dce2cb5
In this commit we revert a prior commit
(5240953de02d281be694b2c87d151d6c7dce2cb5) which was added as a stop
gap before we added the proper state needed to recover from cases where
the commitment transactions of both chains had diverged slightly due to
asymmetric dust limits.
2017-11-10 19:51:00 -08:00
Olaoluwa Osuntokun
e9d0e40a17
lnwallet: update existing channel unit tests to adhere to new channels API's 2017-11-10 19:51:00 -08:00
Olaoluwa Osuntokun
097e1c0f5c
lnwallet: update createTestChannels to adhere to new channeldb API's 2017-11-10 19:50:59 -08:00
Olaoluwa Osuntokun
7f667e2dbc
lnwallet: update funding flow to use new channeldb API's 2017-11-10 19:50:59 -08:00
Olaoluwa Osuntokun
367c6b10fc
lnwallet: add missing OP_CHECKSIG op in senderHTLCScript comment 2017-11-10 19:50:58 -08:00
Olaoluwa Osuntokun
c8479410d2
lnwallet: remove availableLocalBalance field, add new AvailableBalance method
In this commit we do away with the existing availableLocalBalance
attribute and instead add a new, more accurate AvailableBalance method.
The new method will compute the available balance within the channel ,
assuming a new state was created at the instance the method was called.
This new method will now properly account for HTLC fees.

AvailableBalance is now called within AddHTLC in order to ensure we
don’t add any HTLC’s that are unable to be paid for from the PoV of the
fees on the commitment transaction.
2017-11-10 19:50:58 -08:00
Olaoluwa Osuntokun
ded7c11bfe
lnwallet: update channelState interaction to respect new db commitment format 2017-11-10 19:50:57 -08:00
Olaoluwa Osuntokun
b50a94aeab
lnwallet: update ReceiveRevocation to use new DB API's
We no longer need to manually pass in the channel delta to
AppendToRevocationLog (now called AdvanceCommitChainTail) as the
pointers on-disk will be updated atomically.
2017-11-10 19:50:57 -08:00
Olaoluwa Osuntokun
4fa714afce
lnwallet: update RevokeCurrentCommitment to use new DB API's
In this commit we update the RevokeCurrentCommitment method to properly
use the new database UpdateCommitment method along with properly
converting the in-memory commitment to its corresponding on-disk
format.
2017-11-10 19:50:56 -08:00
Olaoluwa Osuntokun
563c07ffa2
lnwallet: re-write and rename LastCounters to ChanSyncMsg
The new version has additional comments, and is also a bit simpler that
the prior version.
2017-11-10 19:50:56 -08:00
Olaoluwa Osuntokun
b5476b2767
lnwallet: re-write and rename ReceiveReestablish to ProcessChanSyncMsg
In this commit we complete the partially completed ReceiveReestablish
method and rename it to ProcessChanSyncMsg. The new version now
properly implements retransmission as defined within BOLT#2.

Additionally, we’ve added a new case which will optimistically try and
force a resynchronization of the commitment states if we detect we can
deliver a new commitment signature sooner than later after realizing
that we need to retransmit our last revocation message when we recevied
a new state transition.
2017-11-10 19:50:55 -08:00
Olaoluwa Osuntokun
769fe5cc13
lnwallet: when signing a new commitment state, store a CommitDiff 2017-11-10 19:50:55 -08:00
Olaoluwa Osuntokun
611412bab0
lnwallet: add new createCommitDiff method
This commit adds a new method: createCommitDiff. The method will, given
a newly constructed commitment, its signature, and HTLC signatures will
create a channeldb.CommitDiff. The CommitDiff created is to be stored
on disk, as it can be used in the case that the remote party didn’t
receive our CommitSig message and also forgot all the updates that we
queued with the update.
2017-11-10 19:50:55 -08:00
Olaoluwa Osuntokun
e50b3e6517
lnwallet: populate htlc indexes within constructed commitment states 2017-11-10 19:50:54 -08:00
Olaoluwa Osuntokun
9c015a5824
lnwallet: revamp restoring channel state from disk after a restart
In this commit we complexly revamp the process of restoring all channel
state back into memory after a restart. We’ll now properly do the
following: restore the pending “dangling” commit of the remote party
into the in-memory commitment chain, re-populate all active HTLC’s back
into their respective update logs with the proper indexes/counters, and
properly restore the current commitment of the remote party back in
memory.
2017-11-10 19:50:54 -08:00
Olaoluwa Osuntokun
4b71e87b77
lnwallet: add new restoreHtlc method to the updateLog
This commit adds a new method to the updateLog which will be used when
restoring the state of a channel from disk after a restart. This new
method will add an entry to the updateLog without incrementing either
of the counters as the HTLC already comes pre populated with its
historical index.
2017-11-10 19:50:53 -08:00
Olaoluwa Osuntokun
51618f2ae3
lnwallet: modify populateHtlcIndexes to use info in commitment
It wasn’t necessary to pass in the dust limit, or the commitment itself
as it is already contained within the commitment struct.
2017-11-10 19:50:53 -08:00
Olaoluwa Osuntokun
60b814b4aa
lnwallet: group commitmentKeyRing and deriveCommitmentKey in file 2017-11-10 19:50:52 -08:00
Olaoluwa Osuntokun
d790eeb375
lnwallet: add [our|their]HtlcIndex to the commitment struct
With these new fields, we’ll be able to properly reconstruct the log
state after a restart, as each commitment will now note both the
current HTLC and log index.
2017-11-10 19:50:52 -08:00
Olaoluwa Osuntokun
145cd0b2b6
lnwallet: export HtlcWeight and CommitWeight publicly 2017-11-10 19:50:51 -08:00
Andrey Samokhvalov
9247168c5d not finished index persistence 2017-11-09 16:38:58 -08:00
Andrey Samokhvalov
28dd6e5d84 channeldb+lnwallet: add remote pending commiment persistance 2017-11-09 16:38:58 -08:00
Andrey Samokhvalov
a10ed36e8f htlcswitch+lnwallet: add malformed payment descriptor 2017-11-09 16:38:58 -08:00
Andrey Samokhvalov
e29193d550 htlcswitch+channel: remove cancel reasons from channel link 2017-11-09 16:38:58 -08:00
Andrey Samokhvalov
1b4e723a5d htlcswicth+channel: switch to store onion blobs in payment descriptor
After addition of the retransmission logic in the channel link, we
should make the onion blobs persistant, the proper way to do this is
include the onion blobs in the payment descriptor rather than storing
them in the distinct struct in the channel link.
2017-11-09 16:38:57 -08:00
Andrey Samokhvalov
d70ffe93e4 htlcswitch+channel: add channel states synchronization
In this commit BOLT№2 retranmission logic for the channel link have
been added. Now if channel link have been initialised with the
'SyncState' field than it will send the lnwire.ChannelReestablish
message and will be waiting for receiving the same message from remote
side. Exchange of this message allow both sides understand which
updates they should exchange with each other in order sync their
states.
2017-11-09 16:38:57 -08:00
Johan T. Halseth
dd4996b4d5
lnwallet: use signDesc.HashType for sweepsig in script_utils
This commit changes the use of SigHash flags in the spend
transactions created in scrit_utils. Instead of always
using SigHashAll for the sweep signature, we instead use
the sighash flag specified by the passed sign descriptor.
2017-11-06 14:31:21 +01:00
Johan T. Halseth
f12dfe2c45
lnwallet/btcwallet: Use signDesc.HashType when signing
Tis commit makes the btcwallet signer implementation use
signDesc.HashType instead of SigHashAll when signing
transactions. This will allow the creator of the transaction
to specify the sighash policy when creating the accompanying
sign descriptior.
2017-11-06 14:31:03 +01:00
Jim Posen
a13ad0a339 multi: Fix various typos. 2017-10-25 13:20:54 -07:00
Jim Posen
2b58a39d30 lnwallet: Simplify updateLog struct by removing redundant pointers.
The updateLog struct contains pointers that refer to the state of the
commitment chains. Instead, query the commitments directly.
2017-10-25 13:11:46 -07:00
Olaoluwa Osuntokun
3b94e5df4d
lnwallet: introduce distinct HTLC counter+index on top of updateLog
In this commit, we fix an existing derivation from the commitment state
machine as defined within the specification. Before this commit, we
only kept a single counter which both HTLC adds and fails/settles would
share. This was valid in the prior pre-spec iteration of the state
machine. However in the current draft of the spec, only a distinct
counter for HTLCs are used throughout.

This would cause an incompatibility, as if we mixed adds and settles
during an exchange, then our counter values would differ with other
implementations. To remedy this, we now introduce a distinct HTLC
counter and index within the updateLog.

Each Add will increment both the log counter, and the HTLC counter.
Each Settle/Fail will only increment the log counter. Inbound
Settle/Fails will index into the HTLC index as to target the proper
HTLC. The PaymentDescriptor type has been extended with an additional
field (HltcIndex) which itself tracks the index of an incoming/outgoing
HTLC.
2017-10-22 18:36:57 -07:00
Jim Posen
7c1ae8bda3 lnwallet: Split tx generation code out of fetchCommitmentView.
This moves the commitment transaction generation code out of
fetchCommitmentView into createCommitmentTx. Aside from being a pretty
clean logical split, this allows the transaction generation code to be
unit tested more effectively.
2017-10-19 22:23:14 -07:00
Jim Posen
bd497438af lnwallet: Pass around key ring instead of individual keys.
The signatures of some functions/methods in lnwallet are simplified by
passing in a commitmentKeyRing argument instead of multiple keys.
2017-10-19 22:23:14 -07:00
Jim Posen
3151a3a596 lnwallet: Refactor commitment key generation code.
Create struct holding all commitment keys to clean up code and avoid
deriving keys multiple times.
2017-10-19 22:23:14 -07:00
Alex
0994852396 lnwallet: add reorg test 2017-10-19 21:26:31 -07:00
nsa
aa6395874d wallet: channel test fee fix for added HTLC
This commit fixes the TestChannelBalanceDustLimit unit test in
channel_test.go. The unit test does not account for the fees
required by adding an HTLC. As a result, Alice's balance according
to her local and remote commitment chains drops below 0 at certain
points. By using the correct fee, this is avoided.
2017-10-19 20:04:04 -07:00
Johan T. Halseth
e6cc46d84e lnwallet: export btcwallet.NetworkDir 2017-10-19 19:17:35 -07:00
Jim Posen
b29af869c7 lnwallet: Support funding tx fee estimation for more input types.
The fee estimation for funding transactions now properly accounts for
different types of UTXOs spent, whereas previously it assumed all
inputs were spending native P2WKH outputs.
2017-10-19 17:37:53 -07:00
Jim Posen
3232fd71c2 lnwallet: Add TxWeightEstimator support for nested pay-to-witness. 2017-10-19 17:37:53 -07:00
Jim Posen
c94130328a lnwallet: Extend Utxo struct with AddressType.
The Utxo struct now includes the address type and redeem/witness
scripts. This is necessary for accurate fee estimation.
2017-10-19 17:37:53 -07:00
Jim Posen
10a336db46 lnwallet: Use TxWeightEstimator in breacharbiter. 2017-10-19 17:37:53 -07:00
Jim Posen
ced530f98e lnwallet: Use TxWeightEstimator for funding transaction. 2017-10-19 17:37:53 -07:00
Jim Posen
fb32c3f73d lnwallet: Create type to estimate transaction weights.
The new TxWeightEstimator type can be used to replace the fee
estimation code for funding transactions and transactions in
breacharbiter.
2017-10-19 17:37:53 -07:00
Jim Posen
7807150e73 lnwallet: Implement BOLT-03 key derivation test vectors. 2017-10-05 16:54:38 -07:00
Laura Cressman
156772d04a channeldb: use binary.Read/Write with bools in channel.go
Use binary.Read/Write in functions to serialize and deserialize
channel close summary and HTLC boolean data, as well as in
methods to put and fetch channel funding info. Remove lnd
implementations of readBool and writeBool as they are no
longer needed. Also fix a few minor typos.
2017-10-02 23:13:47 -07:00
flaurida
e106cfdef1 lnwallet: replace sort.Sort with sort.Slice in channel.go
Use sort.Slice in SignNextCommitment function in lnwallet/channel.go,
as part of the move to use new language features. Remove
sortableSignBatch type wrapper for slice of signJobs since it is
no longer needed to sort jobs according to their output indices.
Also fix a few minor typos in channel.go and sigpool.go.
2017-10-02 23:13:47 -07:00
Jim Posen
40ce817235 lnwallet: Add missing opcode in senderHTLCScript.
As specified in BOLT 03.
2017-10-02 16:33:06 -07:00
Johan T. Halseth
6b3844ea66
lnwallet: add getter for channelState.RemoteNextCommitment 2017-10-02 13:29:32 +02:00
Olaoluwa Osuntokun
30d5b90626
lnwallet: properly derive key tweaks in newHtlcResolution
This commit fixes an existing bug where we attempted to re-use the same
commitTweak value when creating an HTLC resolution. Instead, we now
create the commit tweak value factoring the key that is to be used for
signing.
2017-09-29 20:27:19 -07:00
Braydon Fuller
53181f3ec3 cmd/lncli+lnwallet: specify need for witness outputs for funding channels
In this commit, we extend the help message for `newaddress` 
to indicate which address types can be used when directly 
funding channels. Additionally, we add some additional text 
to the insufficient funding error to detail that we don't have 
enough witness outputs.
2017-09-29 15:38:26 -07:00
Olaoluwa Osuntokun
d79c0ff95b
lnwallet: expand TestForceClose to ensure outgoing HTLC's can be swept
This commit expands the existing TestForceClose test case to add an
HTLC (outgoing) to Alice’s commitment transaction before force closing.
We then ensure that both the pre-signed timeout transaction _and_ the
sign descriptor to sweep the second-level output are fully valid.
2017-09-29 14:38:42 -07:00
Olaoluwa Osuntokun
dc764c992c
lnwallet: fix bug in extractHtlcResolutions, ensure slice is contiguous
This commit fixes an existing bug within extractHtlcResolutions. The
prior code would use an index to assign the returned
OutgoingHtlcResolutions into a single slice. However, this is invalid
as there are two cases where an HTLC might be skipped: if it’s an
incoming HTLC, or if the HLTC itself is dust from the PoV of the
commitment chain.

To fix this, we now instead use append to add items to the slice. This
ensure that we don’t have any “empty” items in between fully populated
items.
2017-09-29 14:32:22 -07:00
Olaoluwa Osuntokun
2141b481ef
lnwallet: properly set the pkScript within an HTLC resolution 2017-09-29 14:28:19 -07:00
Olaoluwa Osuntokun
927fb2ea0a
lnwallet: split off new TestForceCloseDustOutput case from TestForceClose
This commit extracts the ending dust adherence test case from the
existing TestForceClose test case into a distinct test case. With this
modification, we now ensure that the two new tests are focused and test
a single scenario at at time.
2017-09-29 14:13:28 -07:00
Olaoluwa Osuntokun
0086e6e427
lnwallet: in extractHtlcResolutions use csvDelay gated on commitment ownership
This commit fixes a bug wherein we would use the incorrect csvDelay
when crafting HTLC resolutions after a unilateral channel closure.
Previously, we would always use the csvDelay of the local party, as in
the force close case that’s the correct value. However, a unilateral
channel closure instead requires the _remote_ delay.
2017-09-26 19:06:55 -07:00
Olaoluwa Osuntokun
21782374c9
lnwallet: properly use delayKey for htlc-timeout tx in newHtlcResolution
This commit fixes an existing bug when crafting the HTLC resolution in
the face of a commitment broadcast. Previously, we we’re using the
localKey which is incorrect, as directly below we properly use the
delayKey when crafting the secondLevelHtlcScript to sign.
2017-09-26 18:31:22 -07:00
Olaoluwa Osuntokun
8a682d9ec3
lnwallet: add a MaturityDelay field to UnilateralCloseSummary
This commit adds a new field: MaturityDelay, to the
UnilateralCloseSummary struct. This new field will be required, in an
upcoming update as it’s needed in order to properly sweep the
second-level HTLC outputs after MaturityDelay blocks has passed since
confirmation.
2017-09-26 18:00:24 -07:00
Olaoluwa Osuntokun
34604f6214
lnwallet: properly use the p2wkh script in SignDesc for retributions
This commit fixes a minor bug (that doesn’t affect anything atm) when
crafting the SignDesc for sweeping breached outputs. Previously, we
would take the p2wkh script and then p2wsh-ify that, placing that into
the SignDesc. This is incorrect as the p2wkh script is “injected” into
the sighash when signing, and thus doesn’t need another encoding layer.
2017-09-26 17:57:29 -07:00
Olaoluwa Osuntokun
1d487ea78b Merge pull request #341 from cfromknecht/breach-filter-commit-dust
Breach Arbiter Ignore Dust Commitment Outputs
2017-09-26 17:10:12 -07:00
Conner Fromknecht
223f77d135
lnwallet/channel: filter commitment outputs if dust 2017-09-25 18:57:03 -07:00
Olaoluwa Osuntokun
21d151d2ce
lnwallet: ensure the goroutines of all channels are stopped after test execution 2017-09-24 20:20:15 -07:00
Olaoluwa Osuntokun
9164cc218a
lnwallet: modify ReceiveFailHTLC to return value of HTLC failed 2017-09-24 20:17:53 -07:00
Olaoluwa Osuntokun
f576a74bf6
lnwallet: modify SettleHTLC to return value of HTLC settled
This commit adds an additional return value to SettleHTLC in order to
make way for an upcoming change to modify the way bandwidth status from
the link to the switch is reported.
2017-09-24 20:17:14 -07:00
Olaoluwa Osuntokun
2bf8d1b3fb
lnwallet: ensure all channel tests run in parallel 2017-09-24 20:14:30 -07:00
Olaoluwa Osuntokun
c85fcf2885
lnwallet: add test case for ErrInsufficientBalance error in channel state machine 2017-09-24 20:13:46 -07:00
Olaoluwa Osuntokun
815826caac
lnwallet: remove public LocalAvailableBalance method from channel
This commit removes the current active LocalAvailableBalance method
from the channel state machine itself. We still maintain the internal
availableLocalBalance method locally as this is used to ensure that we
don’t add an HTLC which puts our available balance below zero.
2017-09-24 20:13:04 -07:00
Conner Fromknecht
47356493f3
lnwallet/signdesc: increases max witness parsing length 2017-09-19 19:18:21 -07:00
Conner Fromknecht
de1063200a
lnwallet/script_utils: adds public receiver+sender htlc revoke w/key derivation 2017-09-19 19:18:21 -07:00
Conner Fromknecht
84abc962c4
lnwallet/witnessgen: adds htlc offered+accepted revoke witness type 2017-09-19 19:18:21 -07:00
Conner Fromknecht
faf1d40bd0
lnwallet/channel: adds directionality htlc retributions
This commit also adds an incoming flag to
        HtlcRetribution struct to allow the breach arbiter to
        generate the appropriate witness based on the htlc's
        directionality.

        It also ensures that the size of the htlc retribution
        slice is now determined by the size of the number of
        htlcs present in the revoked snapshot, which fixes a
        minor bug that could lead to nil pointer deferences.
2017-09-19 19:18:20 -07:00
Conner Fromknecht
b3a80f7628
lnwallet/size: updated with recent BOLT 5 constants 2017-09-19 19:18:19 -07:00
Conner Fromknecht
da250cd79b
lnwallet/witnessgen: remove use of pointer to Signer iface 2017-09-19 19:18:19 -07:00
Conner Fromknecht
8ef2263e46 lnwallet: move txout serialization out of lnwire 2017-09-14 13:56:25 +02:00
Olaoluwa Osuntokun
67aa519480
lnwallet: reverse order of signatures when spending the funding output
This commit is a follow up to the prior commit, as since we reversed
the order of the pubkeys in the multi-sig scripts, then we also need to
reverse the order of the signatures that we use when attempting to
spend the funding output directly.
2017-09-12 17:54:21 +02:00
Olaoluwa Osuntokun
eb2c8ba653
lnwallet: reverse the order of the pubkeys in the funding output
When creating the script for the funding output, we were reversing the
order of the public keys due to an incorrect assertion of the return
value of the bytes.Compare function. To fix this, we now flip the
order, allowing us to properly create channels as specified within the
specification.
2017-09-12 17:49:37 +02:00
Olaoluwa Osuntokun
5359476936
lnwallet: add new methods to ChannelReservation for dealing w/ chan constraints
This commit adds to methods to the ChannelReservation struct: one for
generating the channel constraints we require for the remote party, and
one for validating their desired constraints, and committing them to
our ChannelConfig.

With these two new methods, we can now begin to properly store and
adhere to the current set of channel flow control constraints.
2017-09-12 17:41:55 +02:00
Olaoluwa Osuntokun
5bb3efba4c
lnwallet: properly use the lsat 6-bytes of the sha hash for state hints
This commit fixes an existing w.r.t the way that we constructed all
commitment transactions. We were computing the hash that the obfsucator
was derived form correctly, but we were using the first 6-bytes, rather
than the last 6 bytes.
2017-09-12 17:38:31 +02:00
Olaoluwa Osuntokun
73421caecc
lnwallet: don't attach the rpcclient to the lnwallet logging instance
We no longer attach the RPC client to the lnwallet logging instance as
it can generate a ton of spam in trace mode as it’ll dump the entire
hex encoded blocks, transactions, etc.
2017-08-30 20:32:37 -07:00
Olaoluwa Osuntokun
a52d405998
lnwallet: ensure HTLC values are properly converted to SAT in commit tx
This commit fixes a bug within the HTLC construction and commitment
transaction construction that would result in HTLC _values_ within the
commitment transaction being off by a factor of 1000. This was due to
the fact that we failed to convert the amount of an HTLC, in mSAT, to
SAT before placing it as an output within the commitment transaction.
When attempt to locate the output index of a particular half, we use
the unconverted amount, meaning it was unnoticed.

This commit adds a new assertion within the TestSimpleAddSettleWorkflow
test to ensure that the HTLC is found within the commitment transaction
with the proper value in satoshi.
2017-08-30 15:34:18 -07:00
Conner Fromknecht
438c6b9621 lnwallet: move latest SignDescriptor + serialization 2017-08-25 17:56:50 -07:00
Philip Hayes
ce411f8e22 lint: fix linter complaints 2017-08-25 17:56:50 -07:00
Philip Hayes
d8c56433e3 lnwallet: extract SignDescriptor serialization and witness generator 2017-08-25 17:56:50 -07:00
Olaoluwa Osuntokun
7f575b688e
multi: txscript.WitnessScript -> txscript.WitnessSignature 2017-08-24 18:55:32 -07:00
Olaoluwa Osuntokun
9f0efddc20
multi: switch from btcrpcclient to rpcclient 2017-08-24 18:54:24 -07:00
Olaoluwa Osuntokun
ad00266451
lnwallet: update channel reservation flow to use milli-satoshis 2017-08-22 00:52:53 -07:00
Olaoluwa Osuntokun
6e54aba7ac
lnwallet: convert channel state machine accounting to milli-satoshi 2017-08-22 00:52:50 -07:00
Olaoluwa Osuntokun
063525c6e0
channeldb: update the OutgoingPayment struct to use lnwire.MilliSatoshi 2017-08-22 00:52:12 -07:00
Olaoluwa Osuntokun
6e17c34229
lnwallet: update commitScriptToSelf to match BOLT-0003
This commit updates the script we use to match the current
specification. The change is minor: we can say an extra byte by moving
the OP_CHECKSIG to the end of the script, and swapping the checks and
seqverify operations in the second clause. However, the witness remains
the same!
2017-08-22 00:52:09 -07:00
Olaoluwa Osuntokun
f458dc26ed
lnwallet: correct godoc comments on script util helper functions
The godoc comments for htlcSpendRevoke and htlcSpendSuccess were
incorrect.
2017-08-15 17:53:45 -07:00
Johan T. Halseth
b9516b7cdd
lnwallet: make CreateCloseProposal take absolute fee instead of fee rate 2017-08-11 12:09:39 +02:00
Olaoluwa Osuntokun
43b736225b
multi: add new method to generate fresh node announcments 2017-08-04 18:32:33 -07:00
Olaoluwa Osuntokun
812ebe6fe6
lnwallet: type htlcWeight and commitWeight as int64's 2017-07-31 21:02:30 -07:00
Olaoluwa Osuntokun
5240953de0
lnwallet: temporarily ensure TestStateUpdatePersistence doesn't make dust
Note that this commit is temporary, and should be reverted once #231 is
merged. The reason we need to do this for now, is that we don’t
properly track the exact state of the remote party’s commitment. In
this test case, the resulting HTLC’s added are dust to one party, but
non-dust to another. So upon restart, the states (balance wise) has
diverged.
2017-07-31 20:53:08 -07:00
Olaoluwa Osuntokun
8c6a83a67d
lnwallet: account for second-level HTLC fee in TestChannelBalanceDustLimit 2017-07-31 20:50:54 -07:00
Olaoluwa Osuntokun
4aacf2b51d
lnwallet: ensure TestHTLCDustLimit also asserts for bob's commit chain 2017-07-31 20:50:12 -07:00
Olaoluwa Osuntokun
350e6d5c9f
lnwallet: extend TestDustHTLCFees to ensure dust HTLC's go to miners 2017-07-31 20:49:13 -07:00
Olaoluwa Osuntokun
00ca97c789
lnwallet: in TestForceClose properly assign Bob's balance 2017-07-31 20:44:22 -07:00
Olaoluwa Osuntokun
1b61341410
lnwallet: when creating channels in tests, properly account for commitment fee 2017-07-31 20:43:38 -07:00
Olaoluwa Osuntokun
db793991ac
lnwallet: don't add trimmed HTLC value to initiator commitment fees
This commit fixes a lingering bug in the way the internal channel state
machine handled fee calculation. Previously, we would count the dust
HTLC’s that were trimmed towards the fee that the initiator paid. This
is invalid as otherwise, the initiator would always benefit from dust
HTLC’s. Instead, we now simply “donate” the dust HTLC’s to the miner in
the commitment transaction. This change puts us in compliance with
BOLT-0003.
2017-07-31 20:41:23 -07:00
Olaoluwa Osuntokun
5ece7fec2d
lnwallet: add a String() method to updateType 2017-07-31 20:37:51 -07:00
Olaoluwa Osuntokun
d4a5eaa6ad
lnwallet: modify CommitSpendNoDelay to directly craft witness
This commit modifies the CommitSpendNoDelay script witness generation
function. We must modify this function as all non-delayed outputs now
also require a key derivation. The current default
signer.ComputeInputScript implementation is unable to directly look up
the public key required as it attempt to target the pub key using the
pkScript.
2017-07-30 20:23:31 -07:00
Olaoluwa Osuntokun
747e0f57d1
multi: fix linter errors 2017-07-30 18:22:45 -07:00
Olaoluwa Osuntokun
07b0604458
lnwallet: add TweakPubKeyWithTweak helper function
This commit adds a new helper function which is identical to
TweakPubkey, but lets the caller specify their own hash tweak.
2017-07-30 17:52:22 -07:00
Olaoluwa Osuntokun
899fa1ea3e
lnwallet: properly populate the signDesc within UnilateralCloseSummary
This commit modifies the closeObserver code to populate the signDesc in
the case we have a non-trimmed balance. Additionally, we now also add a
*wire.OutPoint field to the struct in order to allow receivers of the
message to construct a witness that can spend the newly created output
to their wallet.
2017-07-30 17:52:18 -07:00
Olaoluwa Osuntokun
8a23de5303
lnwallet: consult current state instead of revocation log during unilateral closure 2017-07-30 17:52:14 -07:00
Olaoluwa Osuntokun
6ad9d218b0
lnwallet: update all channel unittests due to new commitment design 2017-07-30 17:51:09 -07:00
Olaoluwa Osuntokun
8121bc77ce
lnwallet: add delivery scripts as a param to CreateCloseProposal+ CompleteCooperativeClose
This commit modifies the methods that transition the state of the
channel into an active closing state. With the new commitment design,
the delivery scripts are no longer pre-committed to the initial funding
messages. Instead, the scripts are sent at the instant that either side
decides to shutdown within the Shutdown message.
2017-07-30 17:51:05 -07:00
Olaoluwa Osuntokun
40e9120c04
lnwallet: populate HTLC resolutions after observing a unilateral channel close 2017-07-30 17:51:02 -07:00
Olaoluwa Osuntokun
01aa4eb2ae
lnwallet: populate HTLC resolutions within the ForceCloseSummary 2017-07-30 17:50:59 -07:00
Olaoluwa Osuntokun
83e0116d7e
lnwallet: extend the UnilateralCloseSummary to include HTLC resolutions
This commit adds a new companion struct: OutgoingHtlcResolution to the
commitment state machine. The purpose of this struct is the provide the
caller with the information necessary to sweep all outgoing HTLC’s in
the case of a broadcast up-to-date commitment transaction.

The HTLC resolutions allow a caller to sweep an outgoing HTLC into
their wallet after the absolute timeout of the HTLc has passed. This is
a two step process, with the first portion consisting of broadcasting
the HTLC timeout transaction itself, and the second portion consisting
of claiming the HTLC itself after a CSV delay.
2017-07-30 17:50:55 -07:00
Olaoluwa Osuntokun
a4c07d061e
lnwallet: the BreachRetribution struct is now aware of HTLC outputs
This commit adds awareness of active HTLC outputs to the
BreachRetribution struct. Previously, in the case of a breach, the
struct was only populated with enough information to sweep the two
commitment outputs. With this commit, the struct now has enough
information to sweep _all_ outputs within the commitment transaction.
2017-07-30 17:50:51 -07:00
Olaoluwa Osuntokun
5a78f80ffe
lnwallet: update restoreStateLogs to be aware of new commitment scheme 2017-07-30 17:50:47 -07:00
Olaoluwa Osuntokun
b9da43a2b8
lnwallet: update fetchCommitmentView due to new commitment design
This commit updates the central fetchCommitmentView method to manage
and derive the necessary easy required to create new commitments due to
the new state machine design within the specification. Each state now
requires us to derive a number of keys for each commitment state:
localDelay, remoteDelay, localKey, remoteKey, the commitment point, and
finally the revocation key itself.
2017-07-30 17:50:43 -07:00
Olaoluwa Osuntokun
3a052d2874
lnwallet: when creating new states, dispatch HTLC signing to sigPool 2017-07-30 17:50:40 -07:00
Olaoluwa Osuntokun
f569b80a80
lnwallet: when verifying new states, dispatch HTLC sig validation to sigPool 2017-07-30 17:50:37 -07:00
Olaoluwa Osuntokun
cd8672f824
lnwallet: update CreateCommitTx due to new key derivation 2017-07-30 17:50:34 -07:00
Olaoluwa Osuntokun
e314b83559
lnwallet: update HTLC script generation to account for new covenant HTLC's
This commit updates the set of functions tasked with generating HTLC’s
scripts for new commitments to now adhere to the new commitment
transaction design. With this change, the process of claiming an HTLC
now requires a second-level HTLC transaction, which solves a prior
issues due to the tight coupling of the timeout and delay clauses when
claiming an HTLC.
2017-07-30 17:50:31 -07:00
Olaoluwa Osuntokun
8b9a58cb15
lnwallet: add a sigPool instances to the state machine struct 2017-07-30 17:50:27 -07:00
Olaoluwa Osuntokun
4c9bd9dc54
lnwallet: when handling possible channel breach, only log if contract breach 2017-07-30 17:50:24 -07:00
Olaoluwa Osuntokun
e56258917e
lnwallet: introduce populateHtlcIndexes for tracking HTLC indexes in commitments
This commit adds a new method to the commitment struct:
populateHtlcIndexes.  populateHtlcIndexes modifies the set of HTLC's
locked-into the target view to have full indexing information
populated. This information is required as we need to keep track of the
indexes of each HTLC in order to properly write the current state to
disk, and also to locate the PaymentDescriptor corresponding to HTLC
outputs in the commitment transaction.

We also modify toChannelDelta to take not of these new changes, and
access the appropriate index directly.
2017-07-30 17:50:21 -07:00
Olaoluwa Osuntokun
549688d793
lnwallet: remove isDustLocal and isDustRemote, replace w/ htlcIsDust
This commit modifies the way we account for dust HTLC’s within the
commitment state machine when creating and validating new states.
Previously, an HTLC was dust if the amount of the HTLC was below the
dustLimit of the commitment chain. Now, with the HTLC covenant
transaction, the value of the HTLC also needs to cover the required fee
of the HTLC covenant transaction at the specified fee rate of the
commitment chain.

As a result, we now determine if an HTLC is dust or not, only at the
commitment site, using the new htlcIsDust function.
2017-07-30 17:50:16 -07:00
Olaoluwa Osuntokun
91165d98bb
lnwallet: eliminate the InitialRevocationWindow within the state machine
This commit modifies the current core channel state machine in order to
may a step towards BOLT-0002 and BOLT-0003 compliance. In this change,
we abandon the prior revocation window, in favor of a fixed revocation
window of size two. The revocation window will be filled at the start
of the lifetime of the channel, and never extended from there until the
channel has been fully closed.

We now maintain two variables, the current un-revoked commitment point,
and the next commitment point to use when creating a new state. The
next commitment point must initially be inserted into the channel state
with the InitNextRevocation method.

A major difference between the prior revocation key handling is that
the remote party now instead sends us the _commitment point_ in
isolation, which we then use locally (with our revocation base point)
to create the next full revocation key for _their_ commitment
transaction.
2017-07-30 17:50:13 -07:00
Olaoluwa Osuntokun
c7df82ab68
lnwallet: update the LightningChannel API usage for recent channels changes
This commit updates much of the state interaction within the
LightningChannel structure to account for the recent changes within the
chanenldb involving the OpenChannel struct, namely the introduction of
ChannelConfig and ChannelConstraints.
2017-07-30 17:50:10 -07:00
Olaoluwa Osuntokun
b5044e9217
lnwallet: introduce the sigPool struct to optimize state creation+verification
This commit introduce a new struct which acts as a companion struct to
the channel state machine struct. With the new commitment state
machine, we require a signature to be signed and validated for each
outstanding non-trimmed HTLC within the commitment state. As it’s
possible to have hundreds of HTLC’s on a given commitment transaction,
rather than perform all ECDSA operations in serial, we instead aim to
parallelize the computation with a worker pool of sign+verify workers.

The two primary methods of the sigPool are SubmitVerifyBatch and
SubmitSignBatch which allow a caller to trigger an asynchronous job
execution when creating or validating a new commitment state.
2017-07-30 17:50:06 -07:00
Olaoluwa Osuntokun
30b1cbc1fd
lnwallet: update interface-level wallet tests for new funding flow
This commit updates the prior set of interface-level wallet tests to
exercise the new funding workflow, and also to switch to utilizing two
wallet instances throughout the tests. This allows us to abandon the
dependency on the bobNode struct.
2017-07-30 17:50:03 -07:00
Olaoluwa Osuntokun
5dc0b407f3
lnwallet: update the btcwallet Signer interface due to new key derivation 2017-07-30 17:50:00 -07:00
Olaoluwa Osuntokun
c872d94606
lnwallet: convert interface-level tests to spin up two wallet instances
This commit modifies the interface-level wallet integration tests to
spin up two distinct wallet instances, wiping them after each
successful test. This change paves the way for an upcoming change which
uses two live wallet instances, rather than mocking out most of the
other interaction.
2017-07-30 17:49:57 -07:00
Olaoluwa Osuntokun
4f02a2af80
lnwallet: remove bobNode as sadly he's no longer needed
This commit removes bobNode from the wallet’s funding interaction
tests. bobNode was originally created at a very early point in lnd’s
life time before any sort of back end chain access was hooked in. At
that time the integration tests were unable to run, but bobNode allowed
us to test a portion of the funding workflow given idealized inputs.

The tests will be modified in a later commit to eschew bobNode in favor
of just having two LightningWallet instances communicate with one
another.
2017-07-30 17:49:54 -07:00
Olaoluwa Osuntokun
eca8dd1076
lnwallet: update testSignOutputUsingTweaks to exercise new key derivation 2017-07-30 17:49:50 -07:00
Olaoluwa Osuntokun
9edc335049
lnwallet: update internal funding workflow to account for BOLT-0002
This commit updates the engine that drives the reservation workflow to
utilize the new ChannelConfig and ChannelConstraint structs added in
prior commits.  With this change, the internal reservation engine has
been modified to retain the prior dual funder workflow, but also be
able to properly manage and execute the new single funder workflow
defined in BOLT-0002.
2017-07-30 17:49:47 -07:00
Olaoluwa Osuntokun
441e5b2d7c
lnwallet: add new helper function to generate both comitment pairs 2017-07-30 17:49:44 -07:00
Olaoluwa Osuntokun
62110b33e7
lnwallet: flesh out the Config struct, wallet constructor now takes 2017-07-30 17:49:41 -07:00
Olaoluwa Osuntokun
c63c7cd22f
lnwallet: update Channel[Reservation+Contribution] for new funding flow
This commit updates the channel reservation workflow in order to
properly implement the new funding workflow defined in BOLT-0002.

The workflow itself hasn’t changed significantly, but the contents of
the contributions of both sides have. The bulk of the fields within the
contribution of both sides has been boiled down into a pointer to the
ChannelConfig which houses all the data required to handle all states
of the channel, and commitment state machine.

For the two portions which are dictated by the other party, we now add
builder-like modifiers to allow specifying the constraints after the
initial portion of the workflow.
2017-07-30 17:49:37 -07:00
Olaoluwa Osuntokun
e930af4b43
lnwallet: convert interface-level tests to be run as sub-tests 2017-07-30 17:49:34 -07:00
Olaoluwa Osuntokun
9c0261206d
lnwallet: modify the Signer interface to reflect new key derivation scheme
This commit modifies the Signer interface to reflect the new key
derivation defined within BOLT-0003. This entails removing the prior
PrivateTweak field all together in favor of two new fields: SingleTweak
and DoubleTweak.

These two fields are mutually exclusive. The SingleTweak field is now
required in order to sign all regular non-delay, and also must be used
to generate signatures for the localKey, or delayKey. The DoubleTweak
field is used to generate the private key that corresponds to the
revoked revocation key.
2017-07-30 17:49:31 -07:00
Olaoluwa Osuntokun
7b002175f4
lnwallet: update state hint derivation to match BOLT-0003 2017-07-30 17:49:28 -07:00
Olaoluwa Osuntokun
ca45ae7524
lnwallet: update TestCommitmentSpendValidation due to new commitment scripts 2017-07-30 17:49:25 -07:00
Olaoluwa Osuntokun
016f56e8e3
lnwallet: update TestRevocationKeyDerivation to use new derivation 2017-07-30 17:49:22 -07:00
Olaoluwa Osuntokun
44ffcf2156
lnwallet: add new test case to exercise singly tweaked key derivation 2017-07-30 17:49:19 -07:00
Olaoluwa Osuntokun
5b6cc5e92d
lnwallet: TestHTLCSenderSpendValidation for new HTLC scripts 2017-07-30 17:49:16 -07:00
Olaoluwa Osuntokun
7c035a4729
lnwallet: update TestHTLCSenderSpendValidation for new scripts 2017-07-30 17:49:13 -07:00
Olaoluwa Osuntokun
c4866723d1
lnwallet: add redemption+spend tests for the second-level HTLC txns 2017-07-30 17:49:09 -07:00
Olaoluwa Osuntokun
1a9ada4897
lnwallet: move stateHintTests global var into TestCommitTxStateHint 2017-07-30 17:49:06 -07:00
Olaoluwa Osuntokun
4e4375513d
lnwallet: update MaxHTLCNumber to precisely match the spec 2017-07-30 17:49:03 -07:00
Olaoluwa Osuntokun
71e47283cf
lnwallet: update size.go to add the weight of the success+timeout txns
This commit updates the constants in size.go to include the weight of
the HTLC success and timeout transactions. These values are required in
order to properly compute the fee required for a particular HTLC
transaction. The fee will change depending on if the HTLC is incoming
or outgoing.
2017-07-30 17:49:00 -07:00
Olaoluwa Osuntokun
360876944e
lnwallet: add new functions to generate + claim second-level HTLC txns
This commit adds a series of new functions that can be used to generate
the second level HTLC transactions, and also to claim the output
created by the transaction after a delay. The details of the scripts
and transaction format can be found in BOLT #3.
2017-07-30 17:48:56 -07:00
Olaoluwa Osuntokun
f70697bf71
lnwallet: update all witness gen funcs for receiver's HTLC scripts 2017-07-30 17:48:53 -07:00
Olaoluwa Osuntokun
4b1a7091e6
lnwallet: update public key scripts for the HTLC receiver's outputs
This commit updates all the pkScripts used within the commitment
transaction of the party that is on the reign side of an HTLC.

The major difference in these scripts as the prior generation’s is that
the claim action is now spared into a distinct transition. This clause
is guarded by a 2-of-2 multi-sig op code, which effecting creates an
off-chain covenant forcing the party claiming the transaction to incur
a delay before the funds can be swept.
2017-07-30 17:48:50 -07:00
Olaoluwa Osuntokun
d697c6ca9a
lnwallet: update the witness generation funcs for sender's HTLC output
This commit updates all the spendHtlcSpend* functions which are used to
spend each of the possible clauses within the HTLC contract placed on
the sender’s commitment transaction.
2017-07-30 17:48:47 -07:00
Olaoluwa Osuntokun
8f5129e08f
lnwallet: update public key scripts for the HTLC sender's commitment tx 2017-07-30 17:48:44 -07:00
Olaoluwa Osuntokun
0b9c117bbd
lnwallet: update key derivation for the commitment txn scheme
This commit updates the key derivation to match the derivation required
in order to construct and validate the commitment scheme that is used
within the draft specification of the Lightning Network. The new scheme
is very similar to the prior scheme aside from the following major
differences:
  * Each key (not just the revocation key) now changes with each state.
  * A commitment point (a component of the revocation key) is used to
randomize each key, and also generate new tweaked versions of the key.
   * Base points are used along with the commitment point to generate
the keys for the commitment transaction.
   * Before the remote party would send over the fully valid revocation
key. Now the remote party sends us a commitment point, which we then
use our local revocation base point to generate their revocation key.
2017-07-30 17:48:41 -07:00
Olaoluwa Osuntokun
13404243cf
lnwallet: revocation root generation is now based on a block hash + node key
This commit modifies the prior revocation root generation to a newer
version which is intended to allow for easy recovery of revocation
state. Rather than using the node’s keys (which we can’t count on NOT
to change), we instead now use the block hash as a salt. With this,
given the block hash prior to the one that funded the channel, and the
node’s identity key, we can reconstruct our revocation state.
2017-07-30 17:48:38 -07:00
Olaoluwa Osuntokun
14832d8c09
lnwallet+lnwire: minor grammatical fixes after UpdateFee merge 2017-07-14 17:10:42 -07:00
Johan T. Halseth
ebe05f6568 lnwallet: add update_fee message support.
This commit adds the possibility for the initiator of a
channel to send the update_fee message, as specified
in BOLT#2. After the message is sent and both parties
have committed to the updated fee, all new commitment
messages in the channel will use the specified fee.
2017-07-14 16:39:15 -07:00
bryanvu
7fbb1e5a37 lnwallet: refactor dust limit tests
Split up and simplified dust limit tests.
2017-07-06 18:05:43 -07:00
bryanvu
73767f8c78 lnwallet: factor createHTLC out of unit tests 2017-07-06 18:05:43 -07:00
bryanvu
5068541044 lnwallet: apply dust HTLC amounts to fees
If an HTLC’s value is below a node’s dust limit, the amount for that
HTLC should be applied to to the fee used for the channel’s commitment
transaction.
2017-07-06 18:05:43 -07:00
Andrey Samokhvalov
8fa2b95c12 lnd: remove seelog logger
The btclog package has been changed to defining its own logging
interface (rather than seelog's) and provides a default implementation
for callers to use.

There are two primary advantages to the new logger implementation.

First, all log messages are created before the call returns.  Compared
to seelog, this prevents data races when mutable variables are logged.

Second, the new logger does not implement any kind of artifical rate
limiting (what seelog refers to as "adaptive logging").  Log messages
are outputted as soon as possible and the application will appear to
perform much better when watching standard output.

Because log rotation is not a feature of the btclog logging
implementation, it is handled by the main package by importing a file
rotation package that provides an io.Reader interface for creating
output to a rotating file output.  The rotator has been configured
with the same defaults that btcd previously used in the seelog config
(10MB file limits with maximum of 3 rolls) but now compresses newly
created roll files.  Due to the high compressibility of log text, the
compressed files typically reduce to around 15-30% of the original
10MB file.
2017-06-25 14:19:56 +01:00
Olaoluwa Osuntokun
5dd7b157a0
lnwallet: fix race condition when forwarding by creating new pubkey
This commit fixes a race condition that would at times occur in the
htlcswitch.TestChannelLinkBidirectionalOneHopPayments test case. A race
condition would occur in the goroutine running ReceiveNewCommitment
compared with the grouting that would obtain the snapshot in order to
make a forwarding decision.

We fix this by creating a new public key for each new commitment
transaction such that we complete avoid the read/write race condition.
2017-06-19 17:43:57 +02:00
Olaoluwa Osuntokun
1be4d67ce4
multi: run all test instances in parallel 2017-06-17 01:00:07 +02:00
Olaoluwa Osuntokun
6937a42f2d
lnwallet: add new ShortChanID method to LightningChannel 2017-06-16 23:25:13 +02:00
Olaoluwa Osuntokun
2e05051176
lnwallet: clarify comment within commitment state sanity function 2017-06-08 22:25:06 -07:00
Olaoluwa Osuntokun
9676d476c9
lnwallet: fix race condition in channel state machine, use single mutex
This commit fixes a race condition that was discovered as a result of
the new htlcswitch package. The StateSnapshot method and all of the
other methods which mutate the state of the channel state machine were
using distinct mutexes. The fix is trivial: all methods accessing the
internal channel state variable now use the same mutex.
2017-06-08 22:24:20 -07:00
Olaoluwa Osuntokun
5e2381a64c
lnwallet: properly set FeeEstimator within integration tests 2017-06-07 17:22:46 -07:00
Olaoluwa Osuntokun
dc40662770
lnwallet/btcwallet: properly pass in FeeEstimator to btcwallet
This commit fixes a bug wherein the wallet would use the default relay
fee to craft transactions. On testnet, this might be insufficient or be
rejected all together in a mainnet setting. Therefore, we now pass in
the FeeEstimator interface and ensure that it’s consulted in order to
set the relay fee the wallet will use to craft transactions.

Note that this is a hold over until we have true dynamic fee
calculation within lnd which can then be extended to the internal
wallets.
2017-06-07 17:01:27 -07:00
Olaoluwa Osuntokun
9fd70958f4
multi: fix linter errors 2017-06-05 19:45:01 -07:00
Olaoluwa Osuntokun
91d4e6a377
lnwallet/btcwallet: fix duplicate imports 2017-06-05 19:41:12 -07:00
Olaoluwa Osuntokun
cbf7cd48f5
multi: update to latest neutrino API changes 2017-06-05 19:41:07 -07:00
Olaoluwa Osuntokun
467ccfde41
lnwallet: update interface test initiation for latest API change 2017-06-05 19:21:44 -07:00
Olaoluwa Osuntokun
3c5d856248
lnwallet: use current height as FundingBrodcastHeight during funding flow 2017-06-05 19:18:34 -07:00
Olaoluwa Osuntokun
54f849a62e
lnwallet: use the FundingBroadcastHeight as height hint for spend ntfns 2017-06-05 19:17:13 -07:00
Olaoluwa Osuntokun
7d62293d4a
lnwallet: remove GetTransaction method from BlockChainIO 2017-06-05 19:12:42 -07:00
Olaoluwa Osuntokun
0e8af209bd
lnwallet/btcwallet: update BlockChainIO implementation to be backend aware 2017-06-05 19:12:00 -07:00
Olaoluwa Osuntokun
aca729abfe
lnwallet/btcwallet: update btcwallet config to be aware of new chain interface 2017-06-05 19:10:08 -07:00
Alex
5746e764cb lnwallet: replace empty byte arrays with nils 2017-06-05 18:54:00 -07:00
Alex
b65f92abe2 lnwallet: ensure minimal OP_IF used everywhere. 2017-06-05 18:41:56 -07:00
Andrey Samokhvalov
79feebea80 channeldb: remove redudant test
After addition of the bidirectional payment test in htlcswitch packet,
which is more abstract, we may remove redudant test.
2017-05-31 11:06:08 -07:00
Andrey Samokhvalov
dbcce82d52 lnwallet: make DeriveRevocationRoot public
In order to be able to use the DeriveRevocationRoot in the createChannel
function inside the htlcswicth package we need to make it public.

NOTE: The original lnwallet.CreateChannel function haven't been
sufficient as far it not takes the private keys as input.
2017-05-31 11:06:08 -07:00
Andrey Samokhvalov
f774e3d9bf lnwallet: add missed addition of RHash
add rhash to the payment descriptor when receiving the settle htlc in
order to be able to pass it during settle htlc packet generation and
later find the user pending payment by rhash without additional hashing.
2017-05-31 11:06:08 -07:00
Andrey Samokhvalov
0e51b1d22d channeldb: add available balance function
In this commit we made state machine to be responsible for returning
proper available balance - amount of satoshi which we able to use at
current moment. This will help us in constrction channel link
abstraction.
2017-05-31 11:06:08 -07:00
Andrey Samokhvalov
fde27716d1 channeldb: add restriction to to use only half of the capacity locally
In this commit severe bug have been fixed which allows the state of the
nodes to be desychnorinesed in the moments of high htlc flow. We limit
the number of the htlc which we can add to commitment transaction
to half of the available capcity. This change fixes the bug when
commimtment transaction on the verge of being full, in this case race
condition might occures and remote htlc will be rejected, but at the
same time they will be added on remote side, the same situiation will
happen with htlc we have added, which cause the commitment transactions
to be different.
2017-05-31 11:06:08 -07:00
bryanvu
408be356fb lnwallet: update channel close to use fee estimation interface
This commit switches the channel close workflow to use the lnwallet fee
estimation interface rather than the hardcoded proposedFee.
2017-05-23 14:31:20 -07:00
bryanvu
514760f529 peer: handling for channel shutdown messages
This commit changes the cooperative channel close workflow to comply
with the latest spec. This adds steps to handle and send shutdown
messages as well as moving responsibility for sending the channel close
message from the initiator to the responder.
2017-05-23 14:31:20 -07:00
Olaoluwa Osuntokun
e689ef61dd
lnwallet: when calc'ing fee for commitment tx, use current fee-per-kw
This commit modifies the fee calculation logic when creating or
accepting a new commitment transaction to use the set FeePerKw within
the channel rather then re-query the estimator each time. The prior
behavior was benign as we currently use a static fee estimator, but the
dynamic setting this could’ve caused a state divergence.
2017-05-16 19:05:18 -07:00
Olaoluwa Osuntokun
82f591dbab
lnwallet: add TODO to properly roll dust outputs into initiator's paid fee 2017-05-16 19:02:52 -07:00
Olaoluwa Osuntokun
4ba01bb558
lnwallet: correct scaling for fee-per-byte to fee-per-weight, divide by 4
This commit corrects an error in the scaling as currently implemented
in the default static fee estimator. The spec draft has an error and
erroneously recommends multiplying by 4 to arrive at the fee-per-weight
from the fee-per-byte. This is incorrect as with the segwit block-size
increase, the ratio is 1/4 rather than 4.
2017-05-16 19:02:02 -07:00
Olaoluwa Osuntokun
c324b11b95
lnwallet: use distinct fee rate for funding transaction coin selection
This commit modifies the coin selection logic around selecting inputs
for a funding transaction to query the fee estimator directly (and use
fee-per-byte), rather than use the fee estimate which was passed into
the context.

We also use the value passed into the InitChannelReservation method
directly rather than make a call to the fee estimator. With this
change, the responder to a funding workflow will now properly adopt the
fee-per-kw suggested by the funder of the channel.
2017-05-16 19:00:27 -07:00
Olaoluwa Osuntokun
222385bf73
lnwallet: calcStaticFee now directly uses feePerKw 2017-05-16 18:56:46 -07:00
Olaoluwa Osuntokun
52942e4f13
lnwallet: NewChannelReservation now accepts target feePerKw for commitment 2017-05-16 18:55:33 -07:00
Olaoluwa Osuntokun
48850d31d6
lnwallet: simplify remote balance computation for single funder
The remote balance in the case of a single funder workflow is simply
what ever the pushSat amount is. The capacity - fundingAmt in this
scenario would always be zero, so we simply just set it directly to
pushSat.
2017-05-16 18:52:39 -07:00
Olaoluwa Osuntokun
392f6b5d8a
lnwallet: convert all references to transaction/block cost to weight 2017-05-16 18:50:55 -07:00
bryanvu
4ac7cc719f lnwallet: replace hard-coded fees and adjust tests accordingly
This commit replaces the hard-coded 5000 satoshi fees with calls to the
FeeEstimator interface. This should provide a way to cleanly plug in
additional fee calculation algorithms in the future. This change
affected quite a few tests. When possible, the tests were changed to
assert amounts sent rather than balances so that fees wouldn't need to
be taken into account. There were several tests for which this wasn't
possible, so calls to the static fee calculator were made.
2017-05-15 20:26:11 -07:00
bryanvu
abe2e502d5 lnwallet: add FeeEstimator interface, StaticFeeEstimator implementation
This commit adds the FeeEstimator interface, which can be used for
future fee calculation implementations. Currently, there is only the
StaticFeeEstimator implementation, which returns the same fee rate for
any transaction.
2017-05-15 20:26:11 -07:00
bryanvu
320bed7e6b lnwallet: add CommitFee field to OpenChannel
In order to cleanly handle shutdowns and restarts during state machine operation, the fee for the current
commitment transaction must be persisted. This allows the fee to be
reapplied when the current state is reloaded.
2017-05-15 20:26:11 -07:00
bryanvu
18f453a3e6 lnwallet: add dust limit to contribution
In order to make the node's dust limit available to the wallet during
the initial stages of the funding process, add and set a
DustLimit field in the Contribution.
2017-05-15 20:26:11 -07:00
bryanvu
74854963bf lnwallet: remove OP_CHECKSEQUENCEVERIFY variable
Primarily to avoid linting errors, the lnwallet.OP_CHECKSEQUENCEVERIFY
variable was removed and references to it replaced with
txscript.OP_CHECKSEQUENCEVERIFY.
2017-05-15 20:26:11 -07:00
bryanvu
c1769f959b lnwallet: fix failure messages, spacing in tests
This commit changes t.Fatal to t.Fatalf in TestCheckDustLimit so as to
provide more information. This commit also makes some column width
adjustments and minor spelling/formatting changes.
2017-05-15 20:26:11 -07:00
Olaoluwa Osuntokun
80598dff11
lnwallet: in closeObserver if commitment is is ours, exit early 2017-05-15 18:21:02 -07:00
Olaoluwa Osuntokun
d2585ae6e5
lnwallet: add new struct UnilateralCloseSummary to provide complete channel close details 2017-05-15 18:20:59 -07:00
Olaoluwa Osuntokun
34959e4648
peer+lnwallet: update API usage to recent channeldb changes 2017-05-14 19:23:57 -07:00
Olaoluwa Osuntokun
2486097554
discovery+lnwallet: fix tests by making mock notifiers compliant to new interface 2017-05-11 15:58:41 -07:00
Olaoluwa Osuntokun
1b4862d815
lnwallet: use new ChainNotifier API, typo fixes 2017-05-11 15:21:05 -07:00
Olaoluwa Osuntokun
a18d9b8449
lnwallet+routing: modify BlockChainIO.GetUtxo to be light client friendly
This commit modifies the GetUtxo method of the BlockChainIO interface
to be more light client friendly by introducing a height hint which
gives light clients that don’t have UTXO set commitments a way in which
they can restrict their search space. Light clients will now be able to
have a concrete cut off point in the chain as they scan backwards for
spentness of an output.
2017-05-11 15:20:29 -07:00
Olaoluwa Osuntokun
521c76d65a
lnwallet: add distinct channel to send close details over
This commit modifies the actions of the closeObserver goroutine to
utilize a _new_ channel to send channel close details over. The
original close signal channel is still used to notify observers that a
channel _has_ been closed, but this new channel will provide a single
observer with details w.r.t _how_ a channel was closed.
2017-05-04 17:39:24 -07:00
Olaoluwa Osuntokun
5e48cf1273
lnwallet: upon force close detection populate close summary 2017-05-04 17:39:22 -07:00
Olaoluwa Osuntokun
be583306ab
lnwallet: include the origin chanPoint in the ForceCloseSummary
This commit adds an additional field to the ForceCloseSummary that
allows observers of the channel that sends this struct to track _which_
channel the force close came from.
2017-05-04 17:39:20 -07:00
Olaoluwa Osuntokun
77ae9f560e
lnwallet: update DeleteState method to latest DB API change 2017-05-04 17:39:17 -07:00
bryanvu
0779ce59fe lnwallet: fix error propagation for funding messages
Previously, if an error was returned during handleSingleFunderSigs or
handleFundingCounterPartySigs, the wallet would hang waiting for
the completeChan channel to be populated. This commit adds nil returns for
the completeChan when errors are propagated.
2017-04-26 21:40:38 -07:00
Olaoluwa Osuntokun
c41d673c7b
lnwallet/btcwallet: update WalletController imp to latest btcwallet API 2017-04-23 19:19:22 -07:00
Olaoluwa Osuntokun
844cdba513
lnwallet/btcwallet: unlock wallet during startup, not creation
This commit modifies the way we go about unlocking the wallet. With the
latest changes to the API of btcwallet, we can on longer directly
access the waddrmgr struct. As a result, we’re now forced to go
_directly_ via the wallet to unlock the waddrmgr. The root
LightingWallet has been modified to not request the root key until we
finish starting the underlying wallet, so we can unlock the wallet in
the Start() method.
2017-04-23 19:17:59 -07:00
Olaoluwa Osuntokun
85b306bb48
lnwallet: fetch the root key during startup rather than on creation
This commit modifies the initialization logic of the LightningWallet to
fetch the root key during startup rather than during creation. We make
this change in order to give enough time for the underlying
WalletController to properly boot up before we ask it to do any work.
2017-04-23 19:15:30 -07:00
Olaoluwa Osuntokun
c4ea5e1e2c
lnwallet: save netParams within struct in constructor 2017-04-23 19:12:19 -07:00
Olaoluwa Osuntokun
c06894a2e6
lnwire: replace ChannelPoint with ChannelID, use new PendingChanID 2017-04-16 15:22:27 -07:00
Olaoluwa Osuntokun
4e988b228e
lnwallet/btcwallet: remove FundingSigner, implement MessageSigner
This commit removes the now deprecated FundingSigner struct as part of
the btcwallet package, and instead replaces it within an implementation
of the MessageSigner interface.
2017-04-14 11:08:24 -07:00
Olaoluwa Osuntokun
98c58ddb67
lnwallet: remove old deprecated MessageSigner struct 2017-04-14 11:00:06 -07:00
Olaoluwa Osuntokun
b226edf96e
lnwallet: introduce the MessageSigner interface
This commit introduces the MessageSigner interface which is an abstract
object capable of signing arbitrary messages with a target public key.
This interface will be used within the daemon for: signing channel
authentication proofs, signing node/channel announcements, and also to
possibly sign arbitrary messages in the future.
2017-04-14 10:59:19 -07:00
Olaoluwa Osuntokun
17d6835861
lnwallet: removed unused sync.RWMutex in PaymentDescriptor 2017-04-11 22:08:25 -07:00
Olaoluwa Osuntokun
31acace692
lnwallet: convert PendingUpdates to FullySynced
This commit improves the channel state machine by converting the
objective PendingUpdates method to a subjective FullySynced method
which is to be used in place of PendingUpdates. The new FullySynced
method is fully encompassing and replaces any upper state required by
the state machine which wraps this one.

The new FullySynced method is identical to PendingUpdates aside from
the fact that: it now also factors in the log message index of the
remote commitment chain, and also introduces a concept of an “owed
commitment”. A commitment chain owes a commitment if the height of the
local commitment chain is higher than that of the remote chain.
2017-04-11 22:02:33 -07:00
Olaoluwa Osuntokun
4cd277c8da
lnwallet: eliminate usage of LightningChannel.theirPrevPkScript
This commit removes the theirPrevPkScript field from the
LightningChannel struct all together. It’s no longer needed as the more
fundamental mutation bug has been fixed within the channel state
machine.
2017-04-11 22:02:30 -07:00
Olaoluwa Osuntokun
a3fd738491
lnwallet: fix HTLC mutation bug in commitment chain
This commit fixes a class of bug that can arise in the channel state
machine when a very high throughput workflow is attempted. Since the
PaymentDescriptor’s within a commitment pointed directly into the log,
any changes to a payment descriptor would also be reflected in all
other ones. Due to this mutation possibility, at times, the
locateOutputIndex method would fail since the HTLC’s pkScript was
modified, causing the channel to fail.

We fix this class of bug by simply ensure that once an HTLC has been
associated with a particular commitment, then it becomes immutable.
2017-04-11 22:02:26 -07:00
Olaoluwa Osuntokun
eca3a10064
lnwallet: reorder PaymentDescriptor attributes to reduce padding 2017-04-11 22:02:23 -07:00
Olaoluwa Osuntokun
0858d8a17d
lnwallet: fix constant overflow build issue on 32-bit systems
This commit fixes a build issue that appears when attempting to
cross-compile binaries to a 32-bit system from a 64-bit system. The
issue was that the defined max-state hint overflows a 32-bit integer. To
fix this issue, we now proeprly specify a type of a uint64 for the typed
constant.
2017-04-07 18:05:04 +02:00
Olaoluwa Osuntokun
a668aab478
lnwallet: couple websockets and wtxmgr logging into package logging
This commit bolsters the logging available within the lnwallet package
by include the logging from both web sockets connections, and the
wtxmgr as part of the exposed package level logging. With this, users
will gain additional avenues for obtaining debug logs from various
parts of the system.
2017-04-01 20:14:13 +02:00
Olaoluwa Osuntokun
ca053e5273
multi: minor coding style and comment clean ups post-discovery merge
This commit implements some minor coding style, commenting and naming
clean up after the recent major discovery service was merged into the
codebase.

Highlights of the naming changes:
* fundingManager.SendToDiscovery -> SendAnnouncement
* discovery.Discovery -> discovery.AuthenticatedGossiper

The rest of the changes consist primary of grammar fixes and proper
column wrapping.
2017-04-01 20:14:05 +02:00
Andrey Samokhvalov
a23715a9c7 lnwallet: add message signer
Added the signer which will be needed in the funding manager to sign
the lnwaire announcement message before sending them to discovery
package. Also in the future the message signer will be used to sign
the users data.
2017-03-29 19:49:05 -07:00
Olaoluwa Osuntokun
6b3a258e86
multi: fix formatting issues in packge README's 2017-03-27 16:25:25 -07:00
Olaoluwa Osuntokun
d6c863e2d1
lnwallet: initialize the height of both commitment chains independently
This commit fixes a slight oversight in the current state machine which
assumes that both commitment chains are always at the same height. In a
future where we move back to allowing nodes to pipeline commitment
updates, this will not always be the case.
2017-03-24 16:26:03 -07:00
Olaoluwa Osuntokun
a8671c485f
lnwallet: properly observe dust limits during cooperative chan closure
This commit fixes a lingering TODO within the wallet portion of the
codebase by properly adhering to the set dust limits when closing a
channel. With this new commit if a party’s current settled balance is
below their current dust-limit, then it will be omitted from the
commitment transaction.

The prior test that asserted negative outputs are rejected has been
removed as they’ll now be avoided by ensuring we omit dust outputs from
the commitment transaction.
2017-03-24 16:20:12 -07:00
Olaoluwa Osuntokun
2dd1c0de3d
lnwallet: adhere to project code-style in restoreStateLogs
This commit does some minor shuffling around and also adds some
additional comments to the restoreStateLogs method within the channel
state machine. After the latest merge in this area, the code has
diverged slightly from what’s considered typical within the rest of the
codebase.
2017-03-24 16:15:19 -07:00
Olaoluwa Osuntokun
c241892104
lnwallet: use full struct initialization for outputs in CreateCommitmentTx 2017-03-24 16:13:36 -07:00
Christopher Jämthagen
d958ea005f lnwallet: check for correct value in HTLC outputs in commitment transaction
It is possible that that there are multiple HTLCs with different values,
but the same public key script. As such, a check against the value should
be performed when looking for HTLC outputs in a commitment transaction.
2017-03-21 21:21:46 -07:00
Christopher Jämthagen
17d29ba62e lnwallet: properly restore public key scripts for HTLCs
Create a new helper method called genHtlcScript which will
generate the public key scripts for a supplied HTLC. This functionality
from addHTLC is removed, and addHTLC will instead call this new
method.

In restoreStateLogs we will regenerate the public key scripts for the
HTLCs with genHtlcScript and restore the proper values.
2017-03-21 21:21:46 -07:00
Christopher Jämthagen
e524b7ac81 test: change HTLC amount in persistent test to account for dust 2017-03-21 21:21:46 -07:00
Christopher Jämthagen
78e102f08d lnwallet: fix settled/cancelled HTLCs remote pkScripts + cleanup
When an HTLC is either cancelled or settled we must properly set the
pkScript for the HTLC on the remote commitment, such that we can
generate a valid ChannelDelta.
2017-03-21 21:21:46 -07:00
Christopher Jämthagen
2222df21f3 lnwallet: fix dust limit checks and toChannelDelta() handling of dust 2017-03-21 21:21:46 -07:00
Christopher Jämthagen
05a90df67a lnwallet: return error from toChannelDelta() if htlc output is not found 2017-03-21 21:21:46 -07:00
Christopher Jämthagen
9083007ece lnwallet: fix bug that retrieves incorrect pkScript in toChannelDelta()
Description of bug:
When calling ReceiveNewCommitment() we will progress through methods
fetchCommitmentView and addHTLC which will add HTLC outputs to the
commitment transaction in the local commitment chain and save the
pkScript to the relevant PaymentDescriptor which resides in the
corresponding updateLog. Finally the local commitment will be added
to the local commitment chain.

When the same user next calls SignNextCommitment we will again
progress through fetchCommitmentView and addHTLC. In addHTLC we will
now overwrite the pkScripts in the PaymentDescriptors with the
pkScript from the context of the remote commitment. When we later
call RevokeCurrentCommitment and proceed into toChannelDelta, we
will not be able to find the correct pkScript in the PaymentDescriptor
to match it against the outputs in the commitment transaction.
This will lead to the nested function locateOutputIndex returning
incorrect values.

Fixing the bug:
We introduce three new fields in PaymentDescriptor:
* ourPkScript
* theirPkScript
* theirPrevPkScript

ourPkScript will include the pkScript for the HTLC from the context
of the local commitment.

theirPkScript will take the value of the latest pkScript for the HTLC
from the context of the remote commitment.

theirPrevPkScript will take the second-latest pkScript for the HTLC
from the context of the remote commitment. This is the value we use
in toChannelDelta when we save a revoked commitment from our peer.

The appropriate value of these fields are set in the addHTLC method.

Additionally we pass a boolean value to toChannelDelta so we know
whether we are operating on a local or remote commitment and grab
the correct pkScript in locateUpdateIndex.
2017-03-21 21:21:46 -07:00
Christopher Jämthagen
4d03f60e40 lnwallet: handle duplicate payment hashes in toChannelDelta() 2017-03-21 21:21:46 -07:00
Olaoluwa Osuntokun
ec52c49b6c
lnd+lnwallet+glide: replace last lingering instances of fastsha256 2017-03-16 19:40:29 -07:00
Thomas Preindl
a1bb36730a lnd: fix typos in comments 2017-03-16 12:39:40 -07:00
Olaoluwa Osuntokun
f217093c00
multi: replace usage of fastsha256 with crypto/sha256
This commit removes all instances of the fastsha256 library and
replaces it with the sha256 library in the standard library. This
change should see a number of performance improvements as the standard
library has highly optimized assembly instructions with use vectorized
instructions as the platform supports.
2017-03-15 18:56:41 -07:00
Andrey Samokhvalov
ee2379775c lnd: fix golint warning which requires to add additional comments 2017-03-13 16:30:23 -07:00
Andrey Samokhvalov
7fcccff22a lnwallet: add TODO which asks to justifying strange import 2017-03-13 16:30:23 -07:00
Andrey Samokhvalov
fd97a4bd19 lnd: partially fix golint warnings 2017-03-13 16:30:23 -07:00
Andrey Samokhvalov
f2843dd4c9 lnd: fix gofmt warnings 2017-03-13 16:30:23 -07:00
Andrey Samokhvalov
8fb54782e2 lnd: fix gosimple warnings 2017-03-13 16:30:23 -07:00
Christopher Jämthagen
242c656fd6 lnwallet: use DefaultDustLimit() instead of hard-coded values 2017-03-09 15:32:31 -08:00
Christopher Jämthagen
810d8c286e test: add TestForceClose for lnwallet package 2017-03-09 15:32:31 -08:00
Christopher Jämthagen
a6a503bf28 lnwallet: ForceCloseSummary should check if to-local output exists
If the value of the to-local output is below the dust limit, the
ForceCloseSummary should not include a sign descriptor for this output.

We also find the proper to-self output by looking for the expected public
key script and not assume that no HTLC outputs exist.
2017-03-09 15:32:31 -08:00
Christopher Jämthagen
52b56b8cf2 lnwallet+test: no dust outputs in commitment transaction + tests
Currently non-HTLC outputs will be accepted in the commitment
transaction as long as it is non-zero. We change this by not allowing
outputs with a value lower than the dust limit. The value of such
an output will go towards transaction fees.
2017-03-09 15:32:31 -08:00
Olaoluwa Osuntokun
fc54c5d8d8
lnwallet: perform sanity check on cooperative closure transacitons
This commit fixes a class of bug that currently exists within the
cooperative closure methods for the channel state machine. As an
example, due to the current hard coded fees, if one of the outputs
generated within the generated closure transaction has a negative
output, then the initiating node would gladly forward this to the
remote node. The remote node would then reject the closure as the
transaction is invalid. However, the act of completing the closure
would cause the remote node’s state machine to shift into a “closed”
state. As a result, any further closure attempts by the first node
(force or regular) would go unnoticed by the remote node.

We fix this issue by ensuring the transaction is “sane” before
initiating of completing a cooperative channel closure.

At test case has been added exercising the particular erroneous case
reported by “moli” on IRC.
2017-02-27 21:00:25 -06:00
Olaoluwa Osuntokun
8283ff2da6
lnwallet: during cooperative closure don't shift status until end
This commit avoids a class of bug wherein the state of the channel
would be marked as closing enough though an error occurred somewhere in
the function. The bug was due to the fact that the channel `status` was
shifted before any actual logic within the function(s) were executed.

We fix this bug by _only_ shifting the channel status once the function
has completed without any error.
2017-02-27 20:52:30 -06:00
Olaoluwa Osuntokun
f0c13c5a15
lnwallet: expose a NextRevocationKey method in channel state machine
This commit adds a new method to the channel’s state machine:
NextRevocationKey. This method is being added in preparation for the
upcoming change to switch to the commitment transaction format outlined
in the spec. When this comes to pass, the ExtendRevocationWindow method
will be removed, as it will no longer be needed.

The NextRevocationKey method will be needed as to conform to the spec,
we’ll need to send the next revocation key within the `fundingLocked`
message.
2017-02-24 16:31:48 -08:00
Olaoluwa Osuntokun
9adc5f6484
lnwallet+channeldb: update callers to shachain API changes 2017-02-24 16:31:45 -08:00
bryanvu
d911107ec6 fundingmanager: Update tests for funding manager persistence
This commit adds the FundingManagerPersistence test to ensure that the
funding process completes as expected when nodes shutdown after the the
funding transaction has been broadcast. Note that the final parts of
several wallet tests have been removed, as functionality has been moved
to the Funding Manager and should now be tested there.
2017-02-24 11:37:33 -08:00
bryanvu
e549a3f0ed fundingmanager: move final funding steps from wallet to funding manager.
Once a channel funding process has advanced to the point of broadcasting
the funding transaction, the state of the channel should be persisted
so that the nodes can disconnect or go down without having to wait for the
funding transaction to be confirmed on the blockchain.

Previously, the finalization of the funding process was handled by a
combination of the funding manager, the peer and the wallet, but if
the remote peer is no longer online or no longer connected, this flow
will no longer work. This commit moves all funding steps following
the transaction broadcast into the funding manager, which is available
as long as the daemon is running.
2017-02-24 11:37:33 -08:00
bryanvu
59763ebc7e channeldb: persist numConfsRequired in OpenChannel.
When a pending channel is persisted and then reloaded upon system startup
it's necessary to also persist the number of confirmations that will be required
before the pending channel can be opened.
2017-02-24 11:37:33 -08:00
bryanvu
3e02ea11ef channeldb: added isPending flag and queries
In order to facilitate persistence during the funding process, added
the isPending flag to channels so that when the daemon restarts, we can
properly re-initialize the chain notifier and update the state of
channels that were going through the funding process.
2017-02-24 11:37:33 -08:00
Andrey Samokhvalov
f86557c3e4 channeldb+lnwallet: replace elkrem with shachain
In this commit the initial implementation of revocation hash
generation 'elkrem' was replaced with 'shachain' Rusty Russel
implementation which currently enshrined in the spec. This alghoritm has
the same asymptotic characteristics but has more complex scheme
to determine wish hash we can drop and what needs to be stored
in order to be able to achive full compression.
2017-02-22 16:49:29 -08:00
Christopher Jämthagen
cf306098c5 lnwallet: extend test to check for valid locktime and sequence 2017-02-22 15:46:59 -08:00
Christopher Jämthagen
bdb38cafcc lnwallet: fix bug that makes commitment transaction unspendable
Introduce TimelockShift which is used to make sure the commitment
transaction is spendable by setting the locktime with it so that
it is larger than 500,000,000, thus interpreting it as Unix epoch
timestamp and not a block height. It is also smaller than the current
timestamp which has bit (1 << 30) set, so there is no risk of having
the commitment transaction be rejected. This way we can safely use
the lower 24 bits of the locktime field for part of the obscured
commitment transaction number.
2017-02-22 15:46:59 -08:00
Christopher Jämthagen
0410ea7374 test: Add table driven tests for script_utils
Add table-driven tests for testing GetStateHint and SetStateHint in package lnwallet.
2017-02-22 15:46:59 -08:00
Christopher Jämthagen
42b3b54e3c lnwallet: allow maximum state size to be used + tests
Add tests to assert maximum state can be used. Also test
that more than one input in the commitment transaction
will fail and that having state number larger than
maxStateHint will fail.
2017-02-22 15:46:59 -08:00
Christopher Jämthagen
873211c02f Use 48-bit commitment transaction numbers
Fix SetStateNumHint and GetStateNumHint to properly
set and get the stateNumHints using the lower 24 bits
of the locktime of the commitment transaction as the
lower 24 bits of the obfuscated state number and the
lower 24 bits of the sequence field as the higher 24
bits.
2017-02-22 15:46:59 -08:00
Olaoluwa Osuntokun
bd775b9bb3
lnwallet: ensure reservation state is cleaned up in case of Cancel
This commit fixes a bug in the wallet’s internal reservation manager
that prevented it from cleaning up the resources used by a reservation
after it was finished running through the workflow.

We fix this issue by ensuring the reservations context is deleted from
the funding limbo.

It is the callers responsibility to properly .Cancel() a reservation in
the case of an error during the funding workflow.
2017-02-22 14:51:41 -08:00
Olaoluwa Osuntokun
d759e05a1c
lnwallet: fix failure to exit early in openChannelAfterConfirmations 2017-02-22 14:51:35 -08:00
Olaoluwa Osuntokun
75787b3e4d
lnwallet: use spew when logging logging retribution 2017-02-21 01:43:39 -08:00
Olaoluwa Osuntokun
f2e077c10c
lnwallet: account for de-sync'd channels within closeObserver
This commit adds an additional case of the closeObserver that will
properly handle the case of a channel being closed by a de-sync’d
commitment transaction from the PoV of the local node. In the case of a
minor 1-state divergence, the commitment transaction broadcast by the
remote node will be 1 state ahead of the commitment transaction we have
locally. This should be seen as a regular unilateral close as they
remote peer didn’t violate the channel contract in any way.

We address this case by changing the `==` to a `>=`.
2017-02-21 01:43:27 -08:00
Olaoluwa Osuntokun
caa464f33b
lnwallet: update channel state machine tests to latest changes
This commit updates the set of channel state machine tests to properly
compile and execute with the latest set of changes to the state
machine.

Most of the changes within this commit are just renaming and field
changes as a result of the new wire messages.

The more substantial change is due to the change in semantics of the
new state machine w.r.t what has and has not been ACK’d when a new
state transition is implemented. In the case of a concurrent update
(both sides add to the log before a state transition), both sides need
to trigger  a state update in order to ensure their updates have been
included.
2017-02-21 01:43:18 -08:00
Olaoluwa Osuntokun
0e0e207802
lnwallet: update state machine to the version within the spec
This commit updates the internal channel state machine to the one as
described within the spec and currently implemented within the rest of
the other Lightning implementations.

At a high level the following modifications have been made:
    * When signing we no loner include the index of the remote party’s
log
      that our signature covers. Instead we include ALL of our current
      updates, but only the updates of the remote party that we’ve
ACK’d.
    * A pending change is considered ACK’d once a revocation message
      has been received, locking in the changes in the remote party’s
      commitment transaction.
   * When sending a new commitment, we remember the index of our
     log at that point so we can mark that portion of the log as ACK’d
     once we receive a revocation message from the remote party.
   * When receiving a new commitment signature, we include ALL of
     the remote party’s changes that we’ve received but only our set
     of changes that’ve been ACK’d by the remote party.
   * Implicitly a revocation message now also implicitly serves to ACK
     all the changes that were included in the CommitSig message
     received before it.

The resulting change is a rather minor diff. However, with this state
machine it’s important to note that the order to sig/revoke messages
has been swapped. A proper exchange now looks like the following:
    * Alice -> Add, Add, Add
    * Alice -> Sig
    * Revoke <- Bob
    * Sig <- Bob
    * Alice -> Revoke

One other thing that’s worth noting is that with this state machine,
since what’s included in an update is implicit, both side may need to
at times send a new commitment update in the case of a concurrent state
transition initiated by both sides.

Finally, all counters/indexes have been made 64-bit integers in order
to properly match the spec.
2017-02-21 01:43:15 -08:00
Olaoluwa Osuntokun
6cf905088c
lnwallet: create new updateLog abstraction within channel state machine
This commit adds a new struct to the channel state machine: updateLog.
updateLog encapsulates the update log linked list itself, a series of
new counters we’ll need in order to switch to the spec’s state machine
and also the index into the log itself. This new struct serves to
simplify much of the logic surrounding the update log and also
elminates a bit of code duplication within the current state machine.

This commit only adds the new struct. The rest of the state machine
will be updated in a later commit to use the new log and its new
counters.
2017-02-21 01:43:13 -08:00
Olaoluwa Osuntokun
39f0300995
lnwallet: add godoc comments to a channel's updateTypes 2017-02-21 01:43:10 -08:00
Olaoluwa Osuntokun
a9416300e5
lnwallet: ensure that total satoshi sent/received aren't counted twice
This commit fixes a bug in the LightingChannel commitment state machine
which could occasionally result in the total number of satoshis sent or
received being counted twice if a redundant state transition were
initiated.

To fix this bug, we now only increment the number of satoshi
sent/recv’d iff it’s the first time the HTLC has been processed.
2017-02-21 01:43:07 -08:00
Olaoluwa Osuntokun
fb9bf054cc
lnwallet: cancel the spend notification when a channel's closeObserver exits
This commit ensures that when a channel’s closeObserver is signaled to
exit before a channel closure has been detected, then the resources
dedicated to the pending spend notification can be freed up.
2017-02-21 01:43:04 -08:00
Olaoluwa Osuntokun
384fe61e73
multi: fix go vet warnings throughout code base 2017-02-16 19:33:19 +08:00
Christopher Jämthagen
a2403d9c07 lnwallet: optimize PaymentDescriptor lookup on HTLC state transitions
rHashMap is used to store the PaymentDescriptor belonging to a received
HTLC's revocation hash. This improves the efficiency of looking up
PaymentDescriptors from their RHash whenever we want to settle or cancel
that HTLC.
2017-02-08 18:22:01 -08:00
Olaoluwa Osuntokun
1da054625b
lnwallet/btcwallet: fix bug in non-recognition of self-funds in chan force close
This commit fixes a bug which would cause the node on the _receiving_
side of a channel force close to be blind of their immediately funds
on-chain. The root of the issue was that within the btcwallet
implementation of the WalletController method ‘NewRawKey’, the wallet
wouldn’t request notifications for the new address, as the direct
function from the waddrmgr was used which skips registration of the new
address.

To fix, this, we now ensure that btcwallet will receive notifications
for keys used within the raw p2wkh commitment output. This ensures that
the wallet is aware of funds that are made available as a result of a
channel force closure by the channel counter party.
2017-02-07 20:01:19 -08:00
Olaoluwa Osuntokun
a9078562ac
lnwallet/btcwallet: fix bug in ordering of change vs regular addresses 2017-02-07 19:55:54 -08:00
Olaoluwa Osuntokun
a393362eb8
lnwallet: ensure CSV delay witness spend uses a minimal OP_IF
This commit fixes a slight scripting related issue as a result of
default policy in Bitcoin Core 0.13.1. With this version of Bitcoin
Core, nodes will now enforce a policy that ensures the first argument
of OP_IF is either an empty vector or a 0x01 value. Our current sent of
functions to generate the witness for the delay clause of the
commitment transaction instead uses a 0x00 value rather than an empty
byte vector.

With this commit we fix the issue by ensuring that we use an empty
vector rather an 0x00 for forcing the commitment delay script pathway.
2017-02-03 15:28:19 -08:00
Olaoluwa Osuntokun
62bcd59db4
lnwallet: add ability to cancel the channel's closeObserver
This commit adds the ability to cancel a channel’s internal
closeObserver goroutine by adding a new public facing Stop method.

Additionally, we now make passing a ChainNotifier interface completely
optional. If the ChainNotifier isn’t passed in as a constructor, then
the closeObserver goroutine will never be launched. This new feature
lets the caller ensure that only a single closeObsever for any given
channels exists.
2017-02-02 17:11:03 -08:00
Olaoluwa Osuntokun
f4b403679b
lnwallet: remove BlockChainIO as a dependency to LightningChannel
This commit removes the BlockChainIO interface as a dependency to the
LightningChannel struct as the interface is no longer used within the
operation of the LightningChannel.
2017-02-02 17:05:40 -08:00
Olaoluwa Osuntokun
de70175be6
lnwallet+funding: properly propagate NewLightningChannel errors
This commit ensures that we now properly handle and propagate errors
that arise when attempting to create a new channel after the funding
transaction is believed to be confirmed.

A previous edge case would arise when a user attempted to create a new
channel, but their corresponding btcd node wasn’t yet fully synced.
2017-01-22 15:06:41 -08:00
Trevin Hofmann
40c7bac3aa multi: fix a variety of typos throughout the repo 2017-01-17 17:02:56 -08:00
Olaoluwa Osuntokun
e60f40b845
lnwallet: fix bug with funding channels with 50/50 balances
This commit fixes a prior bug in the wallet triggered by the creation
of a channel using the single funder workflow, but pushing exactly
*half* of the channel over to the other side. The prior logic to
determine who the initiator would result in a disagreement over who
created the channel initially. This wouldn’t manifest until the channel
was attempted to be closed cooperatively. As both side disagreed about
who created the channel they would apply the closing fee to different
outputs, thereby creating mismatched closing transaction. The signature
would fail to validate as the closer will create a different
transaction from that of the responder.

This commit fixes the issue by properly detecting who initially created
the channel.
2017-01-16 20:28:38 -08:00
Olaoluwa Osuntokun
55f89be10f
lnwallet+lnd: ensure curve parameters are set to avoid panics
This commit fixes a bug introduced by the past attempt to Make Logging
Great Again. Since we unset the curve parameters when reading/writing
the messages, if we have a lingering reference that’s active elsewhere
in the daemon, then we’ll modify that reference. To fix this, we now
explicitly set the Curve parameters in two areas.

A similar commit has been pushed to lightning-onion.
2017-01-14 19:44:37 -08:00
Olaoluwa Osuntokun
ae72475612
lnwallet: create channel close summary when commitment broadcast detected
This commit modifies the closeObserver goroutine to ensure that a close
summary has been inserted into the database before signalling any
observers that a unilateral channel closure was detected. This fixes a
slight bug where a peer would force close a channel, but we wouldn’t
properly detect that and clean up the channel state if had a failed
cooperative channel closure.
2017-01-14 18:01:28 -08:00
Olaoluwa Osuntokun
c451258fd2
lnwallet: properly detect initiator cooperative close in closeObserver
This commit modifies the logic of the closeObserver slightly to not
incorrectly mark the broadcast of the commitment transaction triggered
by a cooperative channel closure as an unprompted broadcast.
2017-01-12 18:30:07 -08:00
Trevin Hofmann
a13ac90d46 multi: add link to LICENSE in README license badges (#100) 2017-01-12 16:31:08 -08:00
Christopher Jämthagen
95888613d0 multi: minor fixes for README's 2017-01-11 15:50:22 -08:00
Olaoluwa Osuntokun
4ccdad0d66
multi: add README's for all sub-packages 2017-01-10 15:02:37 -08:00
Olaoluwa Osuntokun
285ba711a1
lnwallet: add support for the push-during-funding workflow
This commit adds support to the wallet’s internal funding workflow for
pushing a certain amount of BTC to the responder’s side for a single
funder workflow as part of the first commitment.
2017-01-09 18:58:07 -08:00
Olaoluwa Osuntokun
c9dbaa1403
lnwallet: include r-hash of canceled htlc in log entry for cancel
This commit modifies the logic around adding cancel entries to the
update log for the commitment state machine slightly by also including
the r-hash of the HTLC that’s been cancelled in the entry for the
cancellation. With this change, we can accurately track which HTLC is
being cancelled within outer sub-systems.
2017-01-07 21:22:01 -08:00
Olaoluwa Osuntokun
9bb5a45f89
lnwallet: the canceller of an HTLC targets by payment hash not index
This commit alters the new HTLC cancellation logic to instead allow the
canceller of an HTLC to cancel the HTLC by the payment hash rather than
the index of the HTLC.
2017-01-07 21:20:57 -08:00
Olaoluwa Osuntokun
fd0c0574e6
lnwallet: add send/recv of HTLC cancellations to state machine
This commit adds the ability to send/recv HTLC cancellation to the
commitment state machine. Previously this feature had been
unimplemented within the state machine, with only adds/settles working.

With this change, there’s now now no concept of “timing” out HTLC’s,
only the cancellation of HTLC’s which may be triggered for various
reasons.
2017-01-07 21:20:51 -08:00
Olaoluwa Osuntokun
4e53cf8b49
lnwallet: correct error message in txn subscription test 2017-01-07 21:20:47 -08:00
Olaoluwa Osuntokun
5affed38fc
multi: update btcsuite API's to latest upstream changes
This commit makes a large number of minor changes concerning API usage
within the deamon to match the latest version on the upstream btcsuite
libraries.

The major changes are the switch from wire.ShaHash to chainhash.Hash,
and that wire.NewMsgTx() now takes a paramter indicating the version of
the transaction to be created.
2017-01-05 13:56:34 -08:00
Olaoluwa Osuntokun
5957725975
lnwallet: mine enough blocks to activate CSV+segwit in reservation tests 2017-01-05 13:20:37 -08:00
Olaoluwa Osuntokun
0585ed93be
lnwallet: use in-memory height within channel's closeObserver
This commit partially rectifies a quick hack that was previously thrown
in to address an issue discovered due to possible state inconsistencies
between an active channel object and the daemon’s breachAbrbiter.

A prior commit has modified the interaction between the peer and the
breachArbiter to eliminate the state in consistency. Therefore, we no
longer need to access the database to ensure that we’re observing the
latest channel state in order to correctly make a decision about
whether a broadcast commitment transaction is a breach or not.
2016-12-27 16:45:10 -08:00
Olaoluwa Osuntokun
473f298524
lnwallet/btcwallet: fix bug in GetUtxo for BlockChainIO implementation
This commit fixes an unnoticed bug within btcwallet’s implementation of
the BlockChainIO interface, specifically the GetUtxo method. In order
to maintain compatibility with Bitcoin Core’s gettxout method, btcd
doesn’t return an error if the targeted output is actually spent.

We weren’t properly detecting this, but we do now by creating a new
error which is returned in the case of a nil error but a nil return
value.
2016-12-27 16:44:27 -08:00
Olaoluwa Osuntokun
0313dcfc89
lnwallet: thread through tx conf details in ChannelReservation.DispatchChan()
This commit slightly modifies the channel reservation workflow to
expose the new information conerning the exact confirmation location of
the channel provided by the ChainNotifier. The DispatchChan() method of
the ChannelReservation now also returns the blockHeight and txIndex
where the transaction was ultimately confirmed. This information will
be needed by the fundingManager so it can properly generate the
authenticated channel announcement proofs.
2016-12-27 16:44:03 -08:00
Olaoluwa Osuntokun
4a0a657eb0
lnwallet/btcwallet: fix bug in implementation of GetUxo
This commit fixes a bug within the btcwallet implementation of the
BlockChainIO interface. The exact nature of the bug was a rounding
error that would only manifest if the value of the UTXO was below 1
BTC.

The tests within this package currently test channels with mostly whole
values of BTC, as a result the bug went unnoticed until now.

The fix itself is trivial: convert to an int64 AFTER performing the
multiplication to convert to satoshis from Bitcoin.
2016-12-27 16:43:51 -08:00
Olaoluwa Osuntokun
4790ce96a8
lnwallet: public expose funding keys in channel state machine
This commit modifies the attributes of the LightningChannel struct to
publicly expose the funding keys used within the channel for the local
and remote party. Exposing these keys publicly will allow callers to
use the keys involved to generate authenticated channel advertisements
for the routing layer.
2016-12-27 16:43:34 -08:00
Olaoluwa Osuntokun
b49d2827a2
lnwallet/btcwallet: add compile-time interface assertions for Signer+BlockChainIO 2016-12-27 16:43:31 -08:00
Olaoluwa Osuntokun
782fc61dc1
lnwallet+lnrpc: convert GetCurrentHeight to GetBestBlock in BlockChainIO
This commit expands the data returned by the current GetCurrentHeight
to also return the current best block hash, expanding the method into
GetBestBlock. Additionally, the current best BlockHash is also now
displayed within the GetInfo RPC call.
2016-12-27 16:43:26 -08:00
Olaoluwa Osuntokun
597b4ee3d3
channeldb: Open is no longer dependant on a specific set of chain params 2016-12-27 16:43:19 -08:00
Olaoluwa Osuntokun
ddc1eb4c8a
lnwallet: correct comment for logging object 2016-12-27 16:43:07 -08:00
Andrey Samokhvalov
1119d75996
lnwallet: add additional BlockChainIO methods 2016-12-27 16:43:05 -08:00
Olaoluwa Osuntokun
e3e2ba342c
lnwallet: properly set nodeAddr during channel reservation init
This commit fixes a lingering bug within the channel funding
reservation workflow that caused the address of a channel counter-party
to not be written to disk, resulting in an error on start up. To fix
this, we now properly populate the node’s TCP address when initiating
the reservation.
2016-12-14 17:49:18 -08:00
Andrey Samokhvalov
d01f1b5ff4 fundingmanager+lnwallet: add HTLC dust limit logic 2016-12-13 11:01:57 -08:00
Andrey Samokhvalov
202fce5501 channeldb: add TheirDustLimit and OurDustLimit fields in OpenChannel 2016-12-13 11:01:57 -08:00
Andrey Samokhvalov
5a82240c6a lnwire+lnwallet+fundingmanager: general improvements 2016-12-13 11:01:57 -08:00
Olaoluwa Osuntokun
85defc3ec3
lnwallet: add new method IsSynced to the WalletController interface
This commit adds a new method to the WalletController interface:
IsSynced. The role of the function is to query the local wallet about
if it thinks it has fully synced to the tip of the current main chain.
This function can be useful within U.I’s to block off certain
functionality until the wallet is fully synced to the main chain.
2016-12-12 15:56:33 -08:00
Olaoluwa Osuntokun
e0c09a016b
lnwallet: use stored initiator bool to properly construct close tx
This commit modifies the channel closing logic to remove the hard coded
bools indicating which side is attempting the closure. With the recent
changes, the initiator must always pay the channel closure fees.

This information is recently stored on disk, therefore we can use the
boolean to ensure that the closure transaction is created properly no
matter who initiates the close.

This fixes a bug.
2016-12-07 22:39:33 -08:00
Olaoluwa Osuntokun
494fcec874
breacharbiter: introduce new sub-system to watch for breaches
This commit introduces a new sub-system into the daemon whose job it is
to vigilantly watch for any potential channel breaches throughout the
up-time of the daemon. The logic which was moved from the utxoNursery
in a prior commit now resides within the breachArbiter.

Upon start-up the breachArbiter will query the database for all active
channels, launching a goroutine for each channel in order to be able to
take action if a channel breach is detected. The breachArbiter is also
responsible for notifying the htlcSwitch about channel breaches in
order to black-list the breached linked during any multi-hop forwarding
decisions.
2016-11-28 19:44:09 -08:00
Andrey Samokhvalov
da3028e10c lnwallet: add HTLC count validation 2016-11-23 20:02:29 -06:00
Andrey Samokhvalov
391d5cd401 lnwallet: add commitment transaction estimation 2016-11-23 20:02:29 -06:00
Andrey Samokhvalov
5b9e4ae61e general: fix typos, rename variables, add comments 2016-11-23 20:02:29 -06:00
bryanvu
faf9daddf6 lnwallet: calculate channel's total satoshis sent and received
When HTLCs are settled, the channel’s TotalSatoshisSent and
TotalSatoshisReceived fields are updated.
2016-11-22 14:57:03 -06:00
Olaoluwa Osuntokun
cc63db0aee
lnwallet: add detection+handling of contract breaches in channel
This commit adds detection of contract breaches within the commitment
state-machine for a channel. A contract breach is defined as the event
wherein a channel counter-party broadcasts a previously revoked
commitment transaction. Such an event immediately closes a channel as
the funds are now in a state of dispute.

Once a breach is detected, a snapshot of the breached state is
retrieved from the database’s revocation log. This snapshot is then
used to generate the revocation leaf used within this particular state
along with all the other information ncessary to sweep ALL active funds
within the channel. This information is encapsulated within the
BreachRetribution struct which is sent over a new channel dedicated to
sending/receiving BreachRetributions.
2016-11-21 00:54:45 -06:00
Olaoluwa Osuntokun
188811cf05
lnwallet: populate the output index of an HTLC in ChannelDeltas
This commit modifies the logic within the state machine to properly
populate the new field of `OutputIndex` which the HTLC stored within a
channel delta.

With this change, in the future we’ll be able to quickly locate a
particular HTLC output in the scenario that the commitment transaction
has been broadcast on-chain and we need to sweep it. Allocating a few
extra bytes on-disk saves us from the guess-and-check logic+code
required otherwise.
2016-11-20 23:54:24 -06:00
Olaoluwa Osuntokun
2d884618aa
lnwallet: ensure all channel state machine methods are thread-safe
This commit adds some necessary locking to ensure that all updates to
the internal state of the commitment state machine are fully serial and
thread-safe. This change is required to ensure future actions w.r.t
taking action once a revoked commitment transaction has been broadcast
are not carried out while the channel’s state is being updated.
2016-11-20 23:33:27 -06:00
Olaoluwa Osuntokun
e942e70651
lnwallet: extend the SignDescriptor to include a PrivateTweak
This commit extends the SignDescriptor with a single attribute, the
‘PrivateTweak’. The duties of the Signer interface have also been
augmented to properly derive a private key using the specified tweak,
iff it’s non-nil.

As currently defined in order to generate the proper private key based
off of a PrivateTweak, the signer is to add the tweak value to the
private key for the specified public key. This generated value is to be
used for signing within the specified context.

This change paves the way for automatic revoked output sweeping with
signatures generated directly by the Signer interface, maintaining the
structure of the abstraction.

A test has been added at the interface level in order to excerise each
WalletController’s implementation of the key derivation as currently
defined.
2016-11-18 17:12:58 -08:00
Olaoluwa Osuntokun
c81e0a3ebb
lnwallet: convert CommitSpendRevoke+CommitSpendNoDelay to use Signer
This commit converts the rearming two commitment spend functions to use
the lnwallet.Signer interface directly rather than manually manage
private keys during the signing process. This commit is in preparation
for implementation of fully automated revoked uncooperative closure
detection and retribution.
2016-11-18 15:23:50 -08:00
Olaoluwa Osuntokun
22074eb737
lnwallet: integrate obfuscated state hints into funding workflow
This commit finalizes the implementation of #58 by integrating passing
around the obfuscate state hints into the funding workflow of the
wallet, and also the daemon’s funding manager.

In order to amend the tests, the functions to set and receive the state
hints are now publicly exported.
2016-11-16 12:54:39 -08:00
Olaoluwa Osuntokun
3010412bbc
lnwallet: set initiator and channel type during reservation creation 2016-11-16 12:51:27 -08:00
Olaoluwa Osuntokun
74122a0901
lnwallet: encode obfuscated state hints in the commitment tx
This commit modifies the channel state machine slightly to encode the
current state number using 30-bits of the sequence number within the
commitment transaction’s only input.

Such a modification reduces up the processing time required to punish
the counter party for breaching the contract established within the
channel by broadcasting an older revoked state.

This fixes #58 with a minor modification to what was originally
suggested.
2016-11-16 12:49:44 -08:00
Olaoluwa Osuntokun
fef927e276
lnwallet: correct good comments on state hint helper funcs 2016-11-14 18:37:20 -08:00
Olaoluwa Osuntokun
d43ef24ed3
lnwallet: add utility functions for obfuscated commitment state hints
This commit adds two utility functions along with corresponding tests
for adding obfuscated state number hints to each commitment
transaction.

Such a feature reduces the search time to recover the necessary
material to punish a counterpaty for broadcasting an invalid state from
O(N), to O(1), where N is the number of states in the channel’s
transcript. By encoding the obsfucated state number, either side is
able to quickly obtain the ncessary state to excerise “justice”.
2016-11-14 18:35:10 -08:00
Olaoluwa Osuntokun
6e01bb72b0
lnwallet+peer: minor typo fixes 2016-11-14 15:06:17 -08:00
Olaoluwa Osuntokun
4113260f9f
lnwallet: minor comment correction 2016-11-10 17:38:59 -08:00
Olaoluwa Osuntokun
81f7efe1e0
lnwallet+funding: include node net address in reservation workflow
This commit modifies the existing channel reservation workflow slightly
to thread through the IP address that we were able to reach the node
at, or the one which the node reached us via. Additionally, rather than
using OpenChannel.FullSync() at the end of the reservation workflow, we
now use OpenChannel.FullSyncWithAddr() in order to create the
relationship in the database between the channel, and the p2p node we
created the channel with.

All tests, as well as a portion of the fundingManager have been updated
accordingly,
2016-10-26 14:56:58 -07:00