Commit Graph

218 Commits

Author SHA1 Message Date
eugene
9d0d5bdfaf
channeldb: AdvanceCommitChainTail clarification comment 2021-04-21 17:42:53 -04:00
eugene
bb84f0ebc8
multi: store KeyLocator in OpenChannel, use ECDH
This commit adds a RevocationKeyLocator field to the OpenChannel
struct so that the SCB derivation doesn't have to brute-force the
sha chain root key and match the public key. ECDH derivation is now
used to derive the key instead of regular private key derivation a
la DerivePrivKey. The legacy can still be used to recover old
channels.
2021-03-05 12:49:18 -05:00
eugene
986e69c81b
channeldb: add KeyLocator Record 2021-03-05 12:49:16 -05:00
Johan T. Halseth
db66fef6cc
channeldb+htlcswitch: write wire messages using length prefix
In this commit, we modify the way we write wire messages across the
entire database. We'll now ensure that we always write wire messages
with a length prefix. We update the `codec.go` file to always write a 2
byte length prefix, this affects the way we write the `CommitDiff` and
`LogUpdates` struct to disk, and the network results bucket in the
switch as it includes a wire message.
2021-02-24 17:15:27 +01:00
Johan T. Halseth
90d36dbdd4
channeldb: rename Encode/Decode to serializeLogUpdate/deserializeLogUpdate
To more easily use different version of it post-/pre-migration, we
rename the method and make it take the LogUpdate as an argument.
2021-02-24 14:34:57 +01:00
eugene
9b09895bde
channeldb+lnwallet: lastWasRevokeKey to store last sent rev/sig 2021-02-03 16:43:04 -05:00
Johan T. Halseth
d5cd9861d2
channeldb+lnwallet: define zero-fee channel type 2020-12-15 10:13:07 +01:00
eugene
204b6c51cf
channeldb: MigrateOutpointIndex, store indexStatus in outpoint index
Adds an outpoint index that stores a tlv stream. Currently the stream
only contains the outpoint's indexStatus. This should cut down on
big bbolt transactions in several places throughout the codebase.
2020-12-10 17:37:59 -08:00
Johan T. Halseth
743ea7be74
contractcourt/chain_watcher: handleKnownRemoteState
Similar to what we did for the local state handling, we extract handling
all known remote states we can act on (breach, current, pending state)
into its own method.

Since we want to handle the case where we lost state (both in case of
local and remote close) last, we don't rely on the remote state number
to check which commit we are looking at, but match on TXIDs directly.
2020-12-03 08:01:08 +01:00
Andras Banki-Horvath
d89f51d1d0
multi: add reset closure to kvdb.Update
Similarly as with kvdb.View this commits adds a reset closure to the
kvdb.Update call in order to be able to reset external state if the
underlying db backend needs to retry the transaction.
2020-11-05 17:57:12 +01:00
Andras Banki-Horvath
2a358327f4
multi: add reset closure to kvdb.View
This commit adds a reset() closure to the kvdb.View function which will
be called before each retry (including the first) of the view
transaction. The reset() closure can be used to reset external state
(eg slices or maps) where the view closure puts intermediate results.
2020-11-05 17:57:12 +01:00
Johan T. Halseth
517fcd691a
channeldb: correct anchor comment 2020-09-11 11:10:58 +02:00
eugene
62e19185f1 htlcswitch+channeldb: single tx for removing fwdpkgs
This commit changes RemoveFwdPkg to RemoveFwdPkgs so that a single
tx is used instead of N where N is the number of fwd pkgs to remove.
2020-08-31 20:52:51 -04:00
nsa
e4188ba9c2 channeldb+lnwallet: store updates the peer should sign under new key
This fixes a long-standing force close bug. When we receive a
revocation, store the updates that the remote should sign next under
a new database key. Previously, these were not persisted which would
lead to force closure.
2020-07-29 19:03:44 -04:00
nsa
2149157d49 channeldb: filter out unsigned acked updates in AdvanceCommitChainTail
This commit moves the deletion of all updates under the unsigned
acked updates key from AppendRemoteCommitChain to
AdvanceCommitChainTail. This is done because if we went down after
signing for these updates but before receiving a revocation, we would
incorrectly reject their commitment signature:

Alice                Bob
      -----add----->
      -----sig----->
      <----rev------
      <----sig------
      -----rev----->
      <----fail-----
      <----sig------
      -----rev----->
      -----sig----->
      *reconnect*
      <----rev------
      <----add------
      x----sig------

It is also important to note that filtering is required when we
receive a revocation to ensure that we aren't erroneously deleting
remote updates. Take the following state transitions:

 Alice                Bob
       -----add----->
       -----sig----->
       <----rev------
       <----sig------
       -----rev----->
       -----add----->
       -----sig----->
       <----fail-----
       <----sig------
       -----rev-----> (alice stores updates here)
       <----rev------

In the above case, if Alice deleted all updates rather than filtering
when receiving the final revocation from Bob, then Alice would have
to force close the channel due to missing updates. Since Alice hasn't
signed for any of the unsigned acked updates, she should not filter any
of them out.
2020-07-27 15:41:48 -04:00
Wilmer Paulino
6075997ebc
multi: add relative thaw height interpretation
This is useful when we wish to have a channel frozen for a specific
amount of blocks after its confirmation. This could also be done with an
absolute thaw height, but it does not suit cases where a strict block
delta needs to be enforced, as it's not possible to know for certain
when a channel will be included in the chain. To work around this, we
add a relative interpretation of the field, where if its value is below
500,000, then it's interpreted as a relative height. This approach
allows us to prevent further database modifications to account for a
relative thaw height.
2020-07-02 12:05:49 -07:00
Conner Fromknecht
455ddfebdb
multi: rename: ReadBucket to RBucket 2020-05-26 18:21:08 -07:00
Conner Fromknecht
d0d2ca403d
multi: rename ReadTx to RTx 2020-05-26 18:20:37 -07:00
Conner Fromknecht
93089aaaf8
channeldb/channel: don't print ChanStatusDefault when it's not
This commit removes ChanStatusDefault from the list of
orderedChanStatusFlags since it is not flag. As with the prior commit,
the logic around these flags assumes everything in the list is a flag,
but ChanStatusDefault is not.

It turns out we properly special case that if the channel is in
ChanStatusDefault that we only return ChanStatusDefault. However, if any
of the bits are set we would always report ChanStatusDefault since
status&0 == 0. This fixed simply by removing ChanStatusDefault from the
list since we only need the list to express non-default status flags.
2020-04-10 16:11:44 -07:00
Conner Fromknecht
f71cc951fd
channeldb/channel: fix HasChanStatus for ChanStatusDefault
This commit resovles a lingering issue w/in the codebase wrt how the
ChannelStatus flags are defined. Currently ChannelStatus is improperly
used to define a bit field and the individual flags themselves. As a
result, HasChanStatus accepts queries on particular status (combinations
of flags) and individual flags themselves.

This is an issue because the way HasChanStatus computes whether the
channel has a particular status assumes the provided inputs are all
flags (or at least combinations of flags).

However, ChanStatusDefault is simply the absence of any other flag.
Hence, HasChanStatus will always return true when querying for
ChanStatusDefault because status&0 == 0 is always true.

Longer term we should should consider splitting these definitions into
flags and particular states, and change the way construct or operate on
them, but for now I've just special-cased this one value. Fortunately,
we don't query HasChannelStatus w/ ChanStatusDefault anywhere in the
codebase so we dodge a bullet here, but it'd be nice to have some
greater assurances moving forward.
2020-04-10 16:05:12 -07:00
Conner Fromknecht
9385b8cdc6
channeldb+lnwallet: move ActiveHtlcs calc to OpenChannel 2020-04-02 17:39:10 -07:00
nsa
f757bf48bd channeldb: use RemoteCommitment in NextLocalHtlcIndex
This commit changes the fallback in NextLocalHtlcIndex to
RemoteCommitment since the LocalHtlcIndex field lags behind
on the LocalCommitment. Without this bug fix, open circuits
would get prematurely trimmed, resulting in more erroneous
logs. A test case is included to check that the fix works.
2020-03-25 11:49:16 -04:00
Olaoluwa Osuntokun
421d73b72e
channeldb: add new frozen channel type bit and thaw height
In this commit, we add a new channel type bit: a frozen channel. A
frozen channel is one that can only be cooperatively closed by the
responder, but not the initiator. This channel type is useful for
certain classes of channel factory like protocols. We then add a new key
on the channel bucket level to store the height after which this
restriction no longer applies.
2020-03-23 16:56:48 -07:00
carla
41355756a1
channeldb: add balance at height lookup
Add a balance at height lookup function which can be used to
obtain local/remote balance at a given height. The current in memory
commits and revocation log are used to source this information.
2020-03-19 13:20:17 +02:00
Olaoluwa Osuntokun
a4e39906b1
build: silence new linter errors, tidy modules
The explicit `bbolt` dep is gone, as we depend on `kvdb`, which is
actually `walletdb`, which has its own module that defines the proper
`bbolt` version.
2020-03-18 19:35:29 -07:00
Olaoluwa Osuntokun
f0911765af
channeldb: convert to uniformly use new kvdb abstractions
In this commit, we migrate all the code in `channeldb` to only reference
the new `kvdb` package rather than `bbolt` directly.

In many instances, we need to add two version to fetch a bucket as both
read and write when needed. As an example, we add a new
`fetchChanBucketRw` function. This function is identical to
`fetchChanBucket`, but it will be used to fetch the main channel bucket
for all _write_ transactions. We need a new method as you can pass a
write transaction where a read is accepted, but not the other way around
due to the stronger typing of the new `kvdb` package.
2020-03-18 19:34:49 -07:00
Johan T. Halseth
af68ff1640
lnwallet: add anchor commitmenttype
With this commitment type, we'll add extra anchor outputs to the
commitment transaction if the anchor channel type is active.
2020-03-09 12:10:59 +01:00
Johan T. Halseth
b25f2fa94b
channeldb: define AnchorOutputsBit channel type 2020-03-09 12:10:58 +01:00
carla
11d975bd13
channeldb: save channel status on channel close
Add an optional channel status CloseChannel which will be stored on the
hitsorical channel which is persisted at channel close. This status is
used to set the close initiator for channels that do not complete the
funding flow or we abandon. In follow up commits, this status will be
used to record force and breach closes. The value is written to the
historical channel bucket for diplay over rpc.
2020-02-21 13:33:53 +02:00
carla
d3cb6ad869
channeldb: store close initiator status
This commit adds two new channel statuses which indicate the party that
initatited closing the channel. These statuses are set in conjunction
with the existing commit broadcast status so that we do not need to
migrate existing logic to handle multiple types of closes. This status
is set for locally initiated force closes in this commit because they
follow a similar pattern to cooparative closes, marking the commitment
broadcast then proceeding with tx broadcast. Remote force closes are
added in the following commit, as they are handled differently.
2020-02-21 13:33:49 +02:00
Joost Jager
1413995ab7
Merge pull request #3872 from joostjager/invalid-sig-fix
htlcswitch+lnwallet+channeldb: invalid sig fix
2020-01-23 21:08:07 +01:00
Joost Jager
82579400b3
lnwallet: restore unsigned acked remote updates
This commit updates the channel state machine to
persistently store remote updates that we have received a
signature for, but that we haven't yet included in a commit
signature of our own.

Previously those updates were only stored in memory and
dropped across restarts. This lead to the production of
an invalid signature and channel force closure. The remote
party expects us to include those updates.
2020-01-15 13:09:35 +01:00
Joost Jager
2d37d341a1
channeldb: extract log update serialization
Extract functionality to methods as a preparation for serializing remote
log updates.
2020-01-15 12:37:24 +01:00
Joost Jager
ea892fce17
channeldb: update UpdateCommitment description
This method is only used to update the local commitment transaction.
Updated comment accordingly.
2020-01-15 12:37:22 +01:00
Johan T. Halseth
2c46640dd0
channeldb+lnwallet: note that balance is after subtracting commit fee
It was incorrectly stated that the commitment balance was before
subctracting the commit fee, which led to some confusion.
2020-01-06 11:42:02 +01:00
Joost Jager
2ce22d912b
Merge pull request #3763 from joostjager/close-later
cnct: keep open channel data after channel commitment tx confirms
2019-12-17 16:00:20 +01:00
Conner Fromknecht
f3398c0c0e
Merge pull request #3789 from cfromknecht/coop-close-rpc-status
republish force and coop closes on startup
2019-12-05 10:35:53 -08:00
Joost Jager
00ef493aa0
channeldb: keep open channel data in historical channel bucket 2019-12-05 09:19:39 +01:00
Conner Fromknecht
46990c412c
channeldb/channel: allow storing empty closes
This is preparation for the subsequent commit, allowing us to fix a race
condition in the integration test assertions.
2019-12-04 14:25:29 -08:00
Conner Fromknecht
1c0dc98a7c
channeldb: differentiate force vs coop close 2019-12-04 14:25:28 -08:00
carla
77222d8b69
channeldb: Add upfront shutdown script to OpenChannel
This commit adds fields for upfront shutdown scripts set
by the local and remote peer to the OpenChannel struct.
These values are optional, so they are added with their
own keys in the chanBucket in the DB.
2019-12-03 11:38:29 +02:00
Olaoluwa Osuntokun
6753a02439
channeldb: add new NoFundingTxBit modifier to ChannelType
In this commit, we add a new bit to the existing ChannelType bitfield.
If this bit is set, then it signals that we have the funding transaction
stored on disk. A future change will enable lnd to have the funding
transaction be constructed externally, allowing for things like funding
from a hardware wallet, or a channel created as a sub-branch within an
existing channel factory.
2019-12-02 17:11:16 -06:00
Olaoluwa Osuntokun
5bdb0d3d66
channeldb+lntest: code style fixes 2019-11-27 15:21:28 -06:00
Roei Erez
8b3dd9415e channeldb: refresh channel state within RefreshShortChanID
Refresh channel memory state whenever the short channel id is refreshed.
This is to make the in-memory channel consistent with the disk data.

Fixes #3765.
2019-11-27 15:10:00 -06:00
Olaoluwa Osuntokun
a73ee28e46
multi: convert the existing channeldb.ChannelType uint8 into a bit field
In this commit, we convert the existing `channeldb.ChannelType` type
into a _bit field_. This doesn't require us to change the current
serialization or interpretation or the type as it is, since all the
current defined values us a distinct bit. This PR lays the ground work
for any future changes that may introduce new channel types (like anchor
outputs), and also any changes that may modify the existing invariants
around channels (if we're the initiator, we always have the funding
transaction).
2019-10-31 16:34:37 -07:00
Olaoluwa Osuntokun
b399203e71
lnwallet: update channel state machine to be aware of tweakless commits
In this commit, we update the channel state machine to be aware of
tweakless commits. In several areas, we'll now check the channel's type
to see if it's `SingleFunderTweakless`. If so, then we'll opt to use the
remote party's non-delay based point directly in the script, skipping
any additional cryptographic operations. Along the way we move the
`validateCommitmentSanity` method to be defined _before_ it's used as is
cutomary within the codebase.

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

We also update the signing+verification tests to also test that we're
able to properly generate a valid witness for the new tweakless
commitment format.
2019-09-25 18:25:43 -07:00
Olaoluwa Osuntokun
21133e1856
channeldb: define new channel type, SingleFunderTweakless
In this commit, we define a new channel type: SingleFunderTweakless.
We'll use this channel type to denote channels with commitments that
don't tweak the remote party's key in their non-delay output.
2019-09-25 18:25:40 -07:00
Johan T. Halseth
2a6ad6e634
channeldb+lnwallet: don't pass isRestoredChan to ChanSyncMsg
Since we have access to the internal state of the channel, we can
instead get it directly instead of passing it in as a parameter.
2019-09-25 14:04:44 +02:00
Johan T. Halseth
ac0e9b6016
channeldb/channel: add BroadcastedCommitment 2019-09-25 14:04:43 +02:00
Johan T. Halseth
02b2787e44
multi: make MarkCommitmentBroadcasted take closeTx 2019-09-25 14:04:43 +02:00