Commit Graph

833 Commits

Author SHA1 Message Date
Conner Fromknecht
12bbf28e65
htlcswitch: make handleBatchFwdErrors a pure function 2020-04-14 10:48:23 -07:00
Conner Fromknecht
f3051efeb3
htlcswitch/mailbox: block until mailbox shutdown
Fixes a bug where Stop() wouldn't actually wait for the mailbox to exit.
2020-04-14 10:48:06 -07:00
Conner Fromknecht
5b38ed0b3e
htlcswitch/link: correct link log statement 2020-04-14 10:47:47 -07:00
Conner Fromknecht
0f94b8dc62
multi: return input.Signature from SignOutputRaw 2020-04-10 14:27:35 -07:00
Conner Fromknecht
f50649d21b
htlcswitch/link: remove overflow queue
This commit removes the overflowQueue from the link. We do so in order
to promote better UX for senders, so that HTLCs are failed faster when
the commitment is full. This gives the sender the opportunity to try
another, more open path, rather than perceive the HTLC as being stuck.

At the same time, we remove the total number of active goroutines in lnd
by a factor of N where N is the number of active channels.
2020-04-07 13:20:36 -07:00
Conner Fromknecht
68d1753dcb
htlcswitch/test_utils: send htlcs before waiting for result
This commit is preparation for the test added in the subsequent commit.
We modify makeHoldPayment to return any failures direectly when trying
to add an HTLC to the switch. This lets us know that the HTLC was indeed
sent without failure when the method returns.
2020-04-07 11:56:22 -07:00
Conner Fromknecht
5a057de5c4
htlcswitch/mailbox: remove errors from AckPacket, Start, Stop
A following commits will move/modify callsites of AckPacket, Start, and
Stop, none of which use the return value and ultimately cause the linter
to complain. However, none of these in-memory operations can fail so we
just remove the returned errors altogether.
2020-04-07 11:55:54 -07:00
Conner Fromknecht
e86ddf6ae7
htlcswitch/link: remove unused isReProcess argument 2020-04-07 11:55:25 -07:00
Conner Fromknecht
759d7a122f
htlcswitch/test_utils: add missing return
This commit corrects a bug in the testing harness that could cause
more than one error to be returned on the error channel.
2020-04-07 11:54:56 -07:00
Conner Fromknecht
77041c131a
htlcswitch/switch_test: add t.Helper() to assertion 2020-04-07 11:54:02 -07:00
Conner Fromknecht
028345daea
htlcswithc/link_test: rm unused arg from generateHtlc
Linter started complaining.
2020-04-07 11:53:36 -07:00
Conner Fromknecht
2c3641e915
htlcswitch/link_test: fix preimage assertion
This flakes locally for me on darwin.
2020-04-07 11:53:15 -07:00
Conner Fromknecht
425b2c712f
htlcswitch/switch_test: increase checkHtlcEvents timeout
This flakes locally for me on darwin.
2020-04-07 11:52:50 -07:00
Conner Fromknecht
ec784db511
multi: remove returned error from WipeChannel
The linter complains about not checking the return value from
WipeChannel in certain places. Instead of checking we simply remove the
returned error because the in-memory modifications cannot fail.
2020-04-02 17:39:29 -07:00
nsa
966cd2112c multi: link notifies subscribers of ActiveLinkEvent, rpc ignores 2020-03-27 08:49:46 -04:00
Olaoluwa Osuntokun
31de32686e
Merge pull request #4107 from Crypt-iQ/switch_err_0220
htlcswitch: log fixes
2020-03-26 16:45:58 -07:00
nsa
8c0c53eac3 htlcswitch: only error in closeCircuit if the htlc was failed
This commit changes the switch to only log an error if update_fail_htlc
comes in and closeCircuit returns ErrUnknownCircuit. Rationale
being that only settles should hit this code path, anything else
is a result of a link flap and should be treated as an error.
2020-03-25 11:53:46 -04:00
nsa
4fe174ba4e htlcswitch: switch ackDownStreamPackets order with contract update call
This commit modifies updateCommitTx to error with ErrLinkShuttingDown
when we try to send a ContractUpdate on the htlcUpdates chan and the
link has closed the quit chan. It also changes the order of the call
to ackDownStreamPackets and contract update call for consistency since
the packets should be acknowledged before the link goes down.
2020-03-25 11:53:21 -04:00
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
Oliver Gugger
eb531d0449
htlcswitch: add causing error to log and err msg 2020-03-24 10:00:59 +01:00
Olaoluwa Osuntokun
4e68914e9d
htlcswitch: convert to use new kvdb abstraction 2020-03-18 19:34:55 -07:00
Johan T. Halseth
fd93c568ea
config+link: disable watchtower for anchors 2020-03-09 12:59:34 +01:00
Johan T. Halseth
5d5069c477
Merge pull request #3691 from halseth/link-bandwitch-amt-aware
lnwallet: Make available balance HTLC fee aware
2020-02-20 17:56:20 +01:00
carla
c0a4923dc1
htlcswitch: add htlc notifier test 2020-02-19 18:13:18 +02:00
carla
71fdd755b4
htlcswitch: notify local receive settles 2020-02-19 18:06:00 +02:00
carla
6bd0de257a
htlcswitch: notify incoming link failures
This commit adds link failure notifications for failures which occur
on our incoming link. These failures may be receives which we failed or
forwards which we could not parse.
2020-02-19 18:05:49 +02:00
carla
22d370aa51
htlcswitch: notify send forward failures and settles
Add notifications for local initiated sends settles and forwarding
failures. As with link failures, local send settles and forwarding
failures are reported directly to the router so must have their own
notification handling.
2020-02-19 18:05:45 +02:00
carla
79a890fa48
htlcswitch: notify outgoing link failures for local sends
Notify link failures for our own payments. Separate handling code is
required for local payment link failures because we do not pass these
failures back through the switch (like we do for link failures for
forwards), but rather send them straight back to the router. Our own
sends have the payment ID saved in the incoming htlc ID of the packet's
incoming circuit. This change replaces that value with for the sake
of consistent notifying of sends and receives from our node.
2020-02-19 18:05:12 +02:00
carla
937062b6d3
htlcswitch: refactor handleLocalDispatch
Split handleLocalDispatch into an extra handleLocalAddHTLC function so
we can easily notify an error should one occur adding the htlc.
2020-02-19 18:04:51 +02:00
carla
fc0ee06a99
htlcswitch: add notifications for forwards
This commit adds notifications for htlcs which are forwarded through
our node. Forwards are notified when the htlc is added on our ougoing
link, settles when we send a settle message to the downstream peer.
If a failure occurs, we check whether it occurred at our node, then
notify a link or forwarding failure accordingly.

Note that this change also adds forward event notifications for sends
which are initiated by our node because the handling code for adding
a htlc which originates from our node is the same as that for handling
forwards. Htlcs for our locally initiated sends have our internal pid
set in the incoming htlcs id field, so we extract this value and notify
with a zero htlc id to be consistent with receives (which have zero
outgoing circuits). Subsequent settles or failures are not noitfied
for local sends in this commit, and will be handled in a follow up.
2020-02-19 18:03:22 +02:00
carla
b70080a267
htlcswitch: failAddPacket with full packet information
This commit sets more fields on the htlcPacket created to fail adding
a htlc packet to the switch for notification purposes. This new data is
copied by value from the original packet. The packet is then failed
back to the peer that forwarded us the packet, which is handled by
handledownstream packet. The values added to the packet are not used
in the handling of a failed packet.
2020-02-19 17:51:53 +02:00
carla
abf780bf03
multi: add htlcNotifier interface to switch and link
In this commit, a htlcNotifier interface is added to allow for easy
unit testing. Instances of the HtlcNotifier are added to the server,
switch and link.
2020-02-19 17:50:28 +02:00
carla
2074820d85
htlcswitch: add htlcnotifier
This commit adds a HTLCNotifier to htlcswitch which HTLC events
will be piped through to provide clients with subscriptions to
HTLC level events.

The event types added are forward events (which occur for sends
from and forwards through our node), forward failues (when a
send or forward fails down the line), settles for forwards or
receives to our node and link failures which occur when a htlc
is failed at our node (which may occur for a send, receive or
foreward).
2020-02-19 17:50:19 +02:00
Johan T. Halseth
9ff79ae595
lnwallet/channel: account for HTLC fee when reporting available balance 2020-02-19 12:27:42 +01:00
Johan T. Halseth
5e89d5b6c2
link+lnwallet: move bandwidth channel reserve validation into channel
Since we want to handle the edge case where paying the HTLC fee would
take the initiator below the reserve, we move the subtraction of the
reserve into availableBalance where this calculation will be performed.
2020-02-19 12:27:42 +01:00
Olaoluwa Osuntokun
fce472e820
Merge pull request #3876 from breez/allow-timeouted-initiated-htlc
contractcourt: keep channels with timed-out initiated htlcs.
2020-02-17 14:08:44 -08:00
Roei Erez
0407b37fce contractcourt+switch: keep channels with timed-out initiated htlcs.
This commit enables the user to specify he is not interested in
automatically close channels with pending payments that their
corresponding htlcs have timed-out.
By requiring a configurable grace period uptime of our node
before closing such channels, we give a chance to the other node to
properly cancel the htlc and avoid unnecessary on-chain transaction.
In mobile it is very important for the user experience as otherwise
channels will be force closed more frequently.
2020-02-16 09:08:03 +02:00
carla
1ad395ec3f
htlcswitch: add failure details to incoming failures
This commit adds LinkErrors with failure details to htlcs which fail on
our incoming link. This change is made with the intention of notifying
detailed htlc failure reasons in sendHTLCError. The FailureDetail
interface is implemented on FailureResolutionResults so that they can
directly be used to enrich LinkErrors. sendHtlcError is updated to
take a LinkError in preparation for the addition of a htlcnotifier
which will notify the detail of the error.
2020-02-06 19:43:39 +02:00
carla
74e0d545fe
htlcswitch: add linkError field to htlcpacket
This commit adds a linkError field to track the value of failures
which occur at our node. This field is set when local payments or
multi hop htlcs fail in the switch or on our outgoing link. This
addition is required for the addition of a htlc notifier which will
notify these failures in handleDownstreamPacket.

The passing of link error to failAddPacket removes the need for an
additional error field, because the link error's failure detail will
contain any additional metadata. In the places where the failure detail
does not cover all the metadata that was previously supplied by addr
err, the error is logged before calling failAddPacket so that this
change does not reduce the amount of information we log.
2020-02-06 19:43:29 +02:00
carla
9390d3bbfd
htlcswitch: replace outgoing failure with interface
Add a FailureDetail interface which allows us have different kinds of
failures for link errors. This interface will be used to cover failures
that occur when on invoice payment, because the errors have already
been enumerated in the invoices package.
2020-02-06 19:43:23 +02:00
carla
bdd9411bbd
htlcswitch: rename FailureDetail to OutgoingFailure
Rename FailureDetail in a separate commit so that a FailureDetail
interface can be introduced in the following commit.
OutgoingFailureOnionDecode is renamed to OutgoingFailureDecodeError
to specifically indicate that we could not decode the wire
failure that our payment experienced.
2020-02-06 19:43:14 +02:00
carla
2569b4d08a
multi: replace htlcResolution with an interface
This commit repalces the htlcResolution struct with an interface.
This interface is implemeted by failure, settle and accept resolution
structs. Only settles and fails are exported because the existing
code that handles htlc resolutions uses a nil resolution to indicate
that a htlc was accepted. The accept resolution is used internally
to report on the resolution result of the accepted htlc, but a nil
resolution is surfaced. Further refactoring of all the functions
that call NotifyExitHopHtlc to handle a htlc accept case (rather than
having a nil check) is required.
2020-02-06 19:41:36 +02:00
carla
a3478f1d99
htlcswitch: add CheckCircularForward to handlePacketForward
Add a CheckCircularForward function which detects packets which are
forwards over the same incoming and outgoing link, and errors if the
node is configured to disallow forwards of this nature. This check is
added to increase the cost of a liquidity lockup attack, because it
increases the length of the route required to lock up an individual
node's bandwidth. Since nodes are currently limited to 20 hops,
increasing the length of the route needed to lock up capital increases
the number of malicious payments an attacker will have to route, which
increases the capital requirement of the attack overall.
2020-01-30 10:13:40 +02:00
carla
c08377d303
htlcswitch/test: replace mock server delta with constant 2020-01-30 10:02:44 +02:00
carla
ec099bf5dd
htlcswitch: remove extramsg string from ForwardingError
Remove the extramsg field in ForwardingError because
it has been replaced with detailed link errors.
2020-01-14 15:23:11 +02:00
carla
f430fd50c5
htlcswitch: use LinkError for internal errors
Update the ChannelLink interface to specifically
return the LinkError struct. This error implements
the ClearTextError interface, so will be picked
up as a routing realted error by the router.

With LinkErrors implemented, the switch now
returns a LinkError for all failures on our
incoming/outgoing link and ForwardingError when
the failure occurs down the line.
2020-01-14 15:21:15 +02:00
carla
b5a2d75465
htlcswitch+routing: type check on ClearTextError
Update the type check used for checking local payment
failures to check on the ClearTextError interface rather
than on the ForwardingError type. This change prepares
for splitting payment errors up into Link and Forwarding
errors.
2020-01-14 15:07:42 +02:00
carla
6a83b06ab7
htlcswitch: add LinkError implementation of ClearTextError
This change introduces a LinkError implementation
of the ClearTextError interface. This error is intended
to represent failures which occur on our incoming and
outgoing link when sending, receiving and forwarding
htlcs. Paired with ForwardingError, which is represents
failures that did not occur at our node, this error
covers all non-opaque errors that the switch experiences.
2020-01-14 15:07:41 +02:00
carla
102f9b003f
htlcswitch: add ClearTextError interface
This commit adds a ClearTextError interface
which is implemented by non-opaque errors that
we know the underlying wire failure message for.
This interface is implemented by ForwardingErrors,
because we can fully decrypt the onion blob to
obtain the underlying failure reason. This interface
will also be implemented by errors which originate
at our node in following commits, because we know
the failure reason when we fail the htlc.

The lnwire interface is un-embedded in the
ForwardingError struct in favour of implementing
this interface. This change is made to protect
against accidental passing of a ForwardingError
to the wire, where the embedded FailureMessage
interface will present as wire failure but
will not serialize properly.
2020-01-14 15:07:41 +02:00
carla
6f0a342f92
htlcswitch: add ForwardingError constructor
Add a constructor for the creation of forwarding errors.
A special constructor is added for the case where we have
an unknown wire failure, and must set a nil failure message.
2020-01-14 15:07:29 +02:00
Johan T. Halseth
3711597fef
input: remove duplicate commit weight constant 2020-01-06 12:08:25 +01:00
Johan T. Halseth
5e3718a1b5
lnwallet: use channel type to derive keys
We abstract away how keys are generated for the different channel types
types (currently tweak(less)).

Intention is that more of the logic that is unique for each commitment
type lives in commitment.go, making the channel state machine oblivious
to the keys and outputs being created on the commitment tx for a given
channel state.
2020-01-06 12:08:05 +01:00
carla
e0c86f1e71
htlcswitch+invoices: fail mpp timeouts with FailMPPTimeout
This commit adds a getResolutionFailure function
which returns an appropriate wire failure based
on the outcome of a htlc resolution. It also updates
 the MissionControlStore test to ensure that lnd
can handle failures which occur due to mpp timeout.
2019-12-20 13:02:02 +02:00
carla
d2e395d5f2
multi: replace errInvoiceNotFound with resolution result
This commit moves handling of invoice not found
errors into NotifyExitHopHtlc and exposes a
resolution result to the calling functions. The
intention of this change is to make calling
functions as naive of the invoice registry's
mechanics as possible.

When NotifyExitHopHtlc is called and an invoice
is not found, calling functions can take action
based on the HtlcResolution's InvoiceNotFound
outcome rather than having to add a special error
check on every call to handle the error.
2019-12-20 13:01:15 +02:00
carla
7b5dda0417
invoices: add resolution result to htlcResolution
This commit adds the resolution result obtained
while updating an invoice in the registry to
htlcResolution. The field can be used by calling
functions to determine the outcome of the
update and act appropriately.
2019-12-20 13:00:53 +02:00
carla
ebfbc48973
link+contractcourt: rename processHodlEvent to processHtlcResolution 2019-12-20 12:59:56 +02:00
carla
2c1eb17192
mutli: rename HodlEvent to HtlcResolution
This commit renames HodlEvent to HtlcResolution
to better reflect the fact that the struct is
only used for htlc settles and cancels, and that
it is not specifically used for hodl invoices.
2019-12-20 12:58:07 +02:00
Andras Banki-Horvath
44f13d1d60 invoices: adding InvoiceExpryWatcher to cancel expired invoices
This commit adds InvoiceExpryWatcher which is a separate class that
receives new invoices (and existing ones upon restart) from InvoiceRegistry
and actively watches their expiry. When an invoice is expired
InvoiceExpiryWatcher will call into InvoiceRegistry to cancel the
invoice and by that notify all subscribers about the state change.
2019-12-13 17:03:08 +01:00
Joost Jager
8b5bb0ac63
record: move CustomRecordSet 2019-12-12 00:12:19 +01:00
Joost Jager
499f2b16cf
invoices: add RegistryConfig struct 2019-12-11 16:08:07 +01:00
Joost Jager
ddb98fcc41
multi: distinguish between htlc in and out constraints 2019-12-11 00:16:57 +01:00
carla
94d3eb60a4
multi: Use user provided close address for cooperative closes
This commit is adapted from @Bluetegu's original
pull request #1462.

This commit reads an optional address to pay funds out to
from a user iniitiated close channel address. If the channel
already has a shutdown script set, the request will fail if
an address is provided. Otherwise, the cooperative close will
pay out to the address provided.
2019-12-10 09:13:01 +02:00
Joost Jager
37258c414c
hop: store custom records from payload 2019-12-10 06:54:22 +01:00
Joost Jager
cbe213fd0c
tlv: expose unknown values 2019-12-10 06:54:20 +01:00
Olaoluwa Osuntokun
06e8d1c5ca
htlcswitch: fix inconsistency between attribute name and godoc comment 2019-12-04 15:10:39 -08:00
Joost Jager
352334d470
lnrpc: re-enable custom records
This commit also renames the rpc field for consistency. As it wasn't
functional and the id doesn't change, this isn't considered a breaking
change.
2019-12-04 13:27:33 +01:00
Conner Fromknecht
3b253e05f6
multi: restructure invoice Terms field
This commit restructures an invoice's ContractTerms to better encompass
the restrictions placed on settling. For instance, the final ctlv delta
and invoice expiry are moved from the main invoice body (where
additional metadata is stored). Additionally, it moves the State field
outside of the terms since it is rather metadata about the invoice
instead of any terms offered to the sender in the payment request.
2019-11-22 02:25:02 -08:00
Conner Fromknecht
4c872c438b
channeldb: complete migration 12 for TLV invoices 2019-11-22 02:24:28 -08:00
Johan T. Halseth
d4d8b03d5b
Merge pull request #3705 from joostjager/payment-fail-log
routing+htlcswitch: improve failed payment logging
2019-11-15 10:41:48 +01:00
Olaoluwa Osuntokun
e2e94c3b6e
Merge pull request #3701 from joostjager/isolate-odd-even
tlv+hop: contain odd/even logic in payload parsing
2019-11-12 21:03:52 -08:00
Joost Jager
78ecc3d24b
htlcswitch/hop: always accept even custom tlv records
This commit prepares for sending and receiving of application-specific
custom tlv fields.
2019-11-12 16:18:27 +01:00
Joost Jager
048971b40b
tlv+hop: contain odd/even logic in payload parsing
Tlv is used more widely in lnd than just for the onion payload. This
commit isolated the protocol-specific odd/even logic, so that tlv can be
used freely elsewhere. An example of this use is db serialization.
2019-11-12 16:18:25 +01:00
Joost Jager
0d7119a8ca
cnct: parse onion for resolvers
With the introduction of additional payload fields for mpp, it becomes
a necessity to have their values available in the on-chain resolution
flow. The incoming contest resolver notifies the invoice registry of the
arrival of a payment and needs to supply all parameters for the registry
to validate the htlc.
2019-11-12 15:01:39 +01:00
Joost Jager
53076880f1
htlcswitch: report failure source index for forwarding errors 2019-11-12 14:13:29 +01:00
Joost Jager
de33010e90
htlcswitch/test: do not string match error 2019-11-12 14:13:25 +01:00
Joost Jager
b222b6e625
Merge pull request #3685 from cfromknecht/flat-features
flat features
2019-11-09 11:43:45 +01:00
Conner Fromknecht
16318c5a41
multi: merge local+global features from remote peer 2019-11-08 05:31:47 -08:00
Joost Jager
0b5afa64f3
htlcswitch: remove logCommitTick
Replace logCommitTick as a way to deal with revocation window exhaustion
by retrying to update the commit tx when the remote revocation is
received.

The rationale is that the revocation window always opens up because of a
revoke message that is received from the other party. It is therefore
not necessary to set a timer for this. The reception of the revoke
message is the trigger to send a new commit sig if necessary.
2019-11-06 09:21:33 +01:00
Joost Jager
ae67b1a4a4
htlcswitch/test: test revocation window exhaustion 2019-11-06 09:21:31 +01:00
Joost Jager
5078d662ef
htlcswitch: remove batch counter
Now that channel exposes the number of pending local updates, it is no
longer necessary to track the batch size separately in the link.
2019-11-06 09:21:29 +01:00
Joost Jager
2482d84d7d
htlcswitch: stop batch timer if there are no updates 2019-11-06 09:21:27 +01:00
Joost Jager
03b32d046a
htlcswitch+lnwallet: replace updateNeeded by check on channel itself
Instead of tracking local updates in a separate link variable, query
this state from the channel itself.

This commit also fixes the issue where the commit tx was not updated
anymore after a failed first attempt because the revocation window was
closed. Also those pending updates will be taken into account when the
remote party revokes.
2019-11-06 09:21:25 +01:00
Joost Jager
f59b4d62bf
htlcswitch: check for signature owed in link
Previously the channel method FullySynced was used to decide whether to
send a new commit sig message. However, it could happen that FullySynced
was false, but that we didn't owe a commitment signature. Instead we
were waiting on the other party to send us a signature. If that
happened, we'd send out an empty commit sig. This commit modifies the
condition that triggers a new commit sig and fixes this deviation from
the spec.
2019-11-06 09:21:23 +01:00
Joost Jager
64f4421d6c
htlcswitch/test: add test cases that triggers empty commit sig
Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-11-06 09:21:21 +01:00
Conner Fromknecht
014ea0abd0
htlcswitch/iterator: remove unused ExtraOnionBlob method 2019-11-04 15:10:50 -08:00
Conner Fromknecht
9e9b912d3a
multi: replace NotifyExitHopHtlc eob param with hop.Payload 2019-11-04 15:10:32 -08:00
Conner Fromknecht
70708e2e71
htlcswitch: return hop.Payload from HopIterator 2019-11-04 15:10:15 -08:00
Conner Fromknecht
4a6f5d8d3d
htlcswitch/hop/payload: parse option_mpp 2019-11-04 15:10:00 -08:00
Olaoluwa Osuntokun
acd8a6e302
Merge pull request #3470 from cfromknecht/invalid-onion-payload
htlcswitch+lnwire: invalid onion payload
2019-11-01 18:58:00 -07:00
Olaoluwa Osuntokun
4592f87033
Merge pull request #3653 from Roasbeef/external-funding-chainfees
chainfees: create new chainfees package extracting fees from lnwallet
2019-10-31 17:44:00 -07:00
Olaoluwa Osuntokun
777ed104a3
chainfee: create new chainfee package extracting fees from lnwallet
In this commit, we create a new chainfee package, that houses all fee
related functionality used within the codebase. The creation of this new
package furthers our long-term goal of extracting functionality from the
bloated `lnwallet` package into new distinct packages. Additionally,
this new packages resolves a class of import cycle that could arise if a
new package that was imported by something in `lnwallet` wanted to use
the existing fee related functions in the prior `lnwallet` package.
2019-10-31 16:41:57 -07:00
Olaoluwa Osuntokun
a73ee28e46
multi: convert the existing channeldb.ChannelType uint8 into a bit field
In this commit, we convert the existing `channeldb.ChannelType` type
into a _bit field_. This doesn't require us to change the current
serialization or interpretation or the type as it is, since all the
current defined values us a distinct bit. This PR lays the ground work
for any future changes that may introduce new channel types (like anchor
outputs), and also any changes that may modify the existing invariants
around channels (if we're the initiator, we always have the funding
transaction).
2019-10-31 16:34:37 -07:00
Conner Fromknecht
cba523ae30
htlcswitch/hop/payload: apply known constraints if required failure
This commit modifies the NewPayloadFromReader to apply known
presence/omission contraints in the event that the tlv parser returns an
unknown required type failure.

Now that the parser has been modified to finished parsing the stream to
obtain a proper parsed type set, we can accurately apply these higher
level validation checks. This overrides required type failures, such
that they are only returned if the sender properly abided by the
constraints on fields for which we know.

The unit tests are updated to create otherwise valid payloads that then
return unknown required type failures. In one case, a test which
previously returned an unknown required type failure is made to return
an included failure for the sid, indicating the unknown required type 0
is being overruled.
2019-10-30 21:21:10 -07:00
Conner Fromknecht
937b781276
htlcswitch/hop/payload: extend tests to required type failures 2019-10-30 21:20:49 -07:00
Conner Fromknecht
3455f7965d
htlcswitch/link: return InvalidOnionPayload failure
This commit modifies the link return an InvalidOnionPayload failure when
it cannot parse a TLV payload. The offset is left at zero, since its
unclear how useful it will be in practice and would require some
significant reworkings of the abstractions in the tlv package.

TODO: add unit tests. currently none of the test unit infrastructure is
setup to handle TLV payloads, so this would require implementing a
separate mock iterator for TLV payloads that also supports injecting
invalid payloads. Deferring this non-trival effor till a later date
2019-10-30 21:19:53 -07:00
Conner Fromknecht
3c91c3a8ff
htlcswitch/hop/payload: required failures with ErrInvalidPayload
This commit adds a hop.PayloadViolation enum which encompasses the cases
where the sender omits, includes, or requires a type that causes an
ErrInvalidPayload faiulre.

The existing Omitted bool is converted to this PayloadViolation, and
NewPayloadFromReader is updated to return such a failure with a
RequiredViolation when an unknown required type is detected.

The unit tests are updated to cover the three possible cases of
RequiredViolations, as well as included valid intermediate and final hop
tests.
2019-10-30 21:19:08 -07:00
Joost Jager
200be87212
htlcswitch: fix returned failure for insufficient balance
In the scenario where the requested channel does not have enough balance
and another channel towards the same node generates a different failure,
we erroneously returned UnknownNextPeer instead of the expected
TemporaryChannelFailure.

This commit rewrites the non-strict forwarding logic in the switch to
return the proper failure message. Part of this is moving the link
balance check inside the link.
2019-10-23 09:57:34 +02:00
Joost Jager
e1b7cfe2e5
htlcswitch/test: test additional forwarding scenarios 2019-10-23 09:57:32 +02:00
Joost Jager
4ea8927845
htlcswitch/test: add forward mock result 2019-10-23 09:57:30 +02:00
Joost Jager
cb85095ab0
htlcswitch/test: assert on replied failure message 2019-10-23 09:57:28 +02:00
Joost Jager
dcf7a8b871
htlcswitch/test: create genID function 2019-10-23 09:57:26 +02:00
Joost Jager
cf98e99001
htlcswitch: remove source hop check
This is already checked in EligibleToForward()
2019-10-23 09:57:24 +02:00
Joost Jager
5404348f51
htlcswitch: rename policy check functions 2019-10-23 09:57:22 +02:00
Joost Jager
566680defb
htlcswitch: extract failure message creation 2019-10-23 09:57:20 +02:00
Joost Jager
aa359160de
htlcswitch: return consistent failure message for internal error 2019-10-23 09:57:18 +02:00
Conner Fromknecht
dbc0e88584
Merge pull request #3564 from joostjager/htlcswitch-logging
build+htlcswitch+lnwallet: add prefix logger
2019-10-16 13:00:36 +02:00
Wilmer Paulino
4e1658a02f
htlcswitch: raise max cltv limit to 2016 blocks
The previous limit of 1008 proved to be low, given that almost 50% of
the network still advertises CLTV deltas of 144 blocks, possibly
resulting in routes with many hops failing.
2019-10-11 18:07:40 -04:00
Joost Jager
b58dbb2d70
multi: fix canceled spelling 2019-10-03 17:27:36 +02:00
Joost Jager
536dd47ce9
htlcswitch: log in lower case 2019-10-03 10:22:07 +02:00
Joost Jager
654b3cc718
htlcswitch: use prefix logger for remaining log statements in link 2019-10-03 10:22:05 +02:00
Joost Jager
03ed1b0aa3
htlcswitch: use prefix logger in link 2019-10-03 10:22:03 +02:00
Joost Jager
426ee28895
htlcswitch/test: move test functions into context 2019-09-26 15:11:23 +02:00
Joost Jager
23617bb9fd
htlcswitch/test: move test code 2019-09-26 15:11:21 +02:00
Olaoluwa Osuntokun
3f8526a0ca
peer+lnpeer: add new methods to expose local+global features for lnpeer interface 2019-09-25 18:26:01 -07:00
Olaoluwa Osuntokun
4b65aea306
watchtower+htlcswitch: update client tower logic to recognize safu commitments
In this commit, we update the tower+link logic to tag a commitment as
the new (tweakless) format if it applies. In order to do this, the
BackupTask method has gained an additional parameter to indicate the
type of commitment that we're attempting to upload. This new tweakless
bool is then threaded through all the way to back up task creation to
ensure that we make the proper input.Input.

Finally, we've added a new test case for each existing test case to test
each case w/ and w/o the tweakless modifier.
2019-09-25 18:25:55 -07:00
Olaoluwa Osuntokun
0b62126067
multi: update funding workflow to be aware of new tweakless commits
In this commit, we update the funding workflow to be aware of the new
channel type that doesn't tweak the remote party's output within the
non-delay script on their commitment transaction. To do this, we now
allow the caller of `InnitChannelReservation` to signal if they want the
old or new (tweakless) commitment style.

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

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

We also update the signing+verification tests to also test that we're
able to properly generate a valid witness for the new tweakless
commitment format.
2019-09-25 18:25:43 -07:00
Johan T. Halseth
2d194c9672
htlcswitch/link: remove chan sync delay
Earlier this delay was needed to increase the likelihood that the DLP
scanario was successfully completed. Since we would risk the connection
being torn down, and the link exit, we could end up with the remote
marking the channel borked, but not finishing the force close.

With the previous set of commits, we should now trigger the force close
before we merk the channel borked, which should ensure we'll resume the
orocess on next restart/connect.
2019-09-25 14:04:44 +02:00
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
9423fadf56
htlcswitch/link: don't mark channel borked on force close scanarios
Instead of marking the channel Borked in cases where we want to force
close it, we immediately let the peer fail the link. The channel state
will instead be updated by the channel arbitrator, which will transition
to StateBroadcastCommit, marking the channel borked, then marking the
commitment tx broadcasted right before publishing the force close tx. We
do this to avoid the case where we would mark it Borked, but go down
before being able to publish the closing tx.

Storing the force close tx ensures it will be re-published on startup.
2019-09-25 14:04:44 +02:00
Johan T. Halseth
6e361d04cf
lnwallet+link: move marking channel states to link
Instead of marking the database state when processing the channel
reestablishment message, we wait for the result of this processing to
arrive in the link, and mark it accordingly in the database here.

We do this move the logic determining whether we should force close the
channel or not, and what state to mark it in the DB, to the same place,
as these need to be consistent.
2019-09-25 14:04:43 +02:00
Johan T. Halseth
f40f4620f7
lnwallet/channel: make ErrCommitSyncLocalDataLoss type
This commit converts the ErrCommitSyncLocalDataLoss error into a struct,
that also holds the received last unrevoked commit point from the remote
party.
2019-09-25 14:04:43 +02:00
Johan T. Halseth
eb1b84c0b4
channeldb+lnwallet: make ChanSyncMsg method on OpenChannel 2019-09-25 14:04:42 +02:00
Olaoluwa Osuntokun
9b1ecbd3fa
Merge pull request #2485 from halseth/error-codes-dont-send
[lnwire+funding] Don't send ErrorCode on wire
2019-09-23 17:50:27 -07:00
Valentine Wallace
9a52cb6dab
multi: update internals to support updating max htlc
In this commit, we update the router and link to support users
updating the max HTLC policy for their channels. By updating these internal
systems before updating the RPC server and lncli, we protect users from
being shown an option that doesn't actually work.
2019-09-23 13:07:10 +02:00
Joost Jager
c80feeb4b3
routing+discovery: extract local channel manager
The policy update logic that resided part in the gossiper and
part in the rpc server is extracted into its own object.

This prepares for additional validation logic to be added for policy
updates that would otherwise make the gossiper heavier.

It is also a small first step towards separation of our own channel data
from the rest of the graph.
2019-09-23 13:07:08 +02:00
Johan T. Halseth
33fe09482b
lnwire+multi: define Error() for lnwire.Error
To make lnwire.Error actually satisfy the error interface, define the
Error method directly.
2019-09-20 10:55:21 +02:00
Conner Fromknecht
3276bf2960
htlcswitch/link: remove channel reestablish deadline
Now that the link will remain ineligible until it receives
channel_reestablish from the remote peer, we can remove the channel
reestablish timeout entirely.
2019-09-19 12:47:08 -07:00
Conner Fromknecht
9d6ee2ebd9
htlcswitch/link: restrict EligibleToForward to wait for reestablish
This commit modifies the link's EligibleToForward() method only return
true once the peers have successfully exchanged channel reestablish
messages. This is a preliminary step to increasing the reestablish
timeout, ensuring the switch won't try to forward over links while
we're waiting for the remote peer to resume the connection.
2019-09-19 12:46:56 -07:00
Conner Fromknecht
6dca07577d
multi: move active/inactive ntfns from switch to link
Since we will now wait to deliver the event after channel reestablish,
notifying when the link is added to the switch will no longer be
sufficient. Later, we will add receiving reestablish as an additional
requirement for EligibleToForward returning true.

The inactive ntfn is also moved, to ensure that we don't fire inactive
notifications if no corresponding active notification was sent.
2019-09-19 12:46:44 -07:00
Joost Jager
f60e4b1e14
lnwire+htlcswitch: report height for invalid payment details failure
Extends the invalid payment details failure with the new accept height
field. This allows sender to distinguish between a genuine invalid
details situation and a delay caused by intermediate nodes.
2019-09-16 10:10:20 +02:00
Joost Jager
4e140213f9
htlcswitch+invoices: circuit key based hodl notifications
This commit modifies hodl htlc notification from invoice registry from a
single notification per hash to distinct notifications per htlc. This
prepares for htlc-specific information (accept height) to be added to the
notification.
2019-09-16 10:10:14 +02:00
Conner Fromknecht
72c5d11a1c
Merge pull request #3502 from joostjager/err-returns
multi: fix dropped errors
2019-09-13 11:24:04 -07:00
Joost Jager
1e0ed1e52f
multi: fix dropped errors 2019-09-13 09:50:38 +02:00
Lars Lehtonen
3b29ecb921 routing: Fix dropped errors in tests.
lnd: Fix dropped errors in tests.

contractcourt: Fix dropped errors in tests.

htlcswitch: Fix dropped errors in tests.

invoices: Fix dropped error in tests.

lnwallet: Fix dropped errors in tests.

macaroons: Fix dropped error in tests.
2019-09-13 06:28:05 +00:00
Conner Fromknecht
2c3ce2a183
Merge pull request #3484 from joostjager/fix-hop-log
htlcswitch/hop: fix logging
2019-09-11 13:37:43 -07:00
Joost Jager
3d7de2ad39
multi: remove dead code 2019-09-10 17:21:59 +02:00
Valentine Wallace
8ce7f82da0 discovery+switch: apply zero forwarding policy updates in-memory as well as on disk
In this commit, we fix a bug where if a user updates a forwarding policy to be
zero, the update will be applied to the policy correctly on-disk, but not
in-memory.

We solve this issue by having the gossiper return the list of on-disk updated
policies and passing these policies to the switch, so the switch can assume
that zero-valued fields are intentional and not just uninitialized.
2019-09-09 23:39:44 -07:00
Olaoluwa Osuntokun
2cf10ada0f
Merge pull request #3465 from cfromknecht/tlv-parsed-types
tlv+htlcswitch: validate presence/omission of parsed onion payload types
2019-09-09 05:42:03 -07:00
Joost Jager
3a2ca434fe htlcswitch/hop: fix logging
Logging for the hop package is controlled via the parent htlcswitch
package. Unfortunately the parent package only controlled the
initialization, but didn't enable the logger when the log level came
in from the main lnd package.
2019-09-09 13:52:35 +02:00
Conner Fromknecht
6015567927
htlcswitch/iterator: validate presence/omission of payload types
From BOLT 04:

The writer:
 - MUST include amt_to_forward and outgoing_cltv_value for every node.
 - MUST include short_channel_id for every non-final node.
 - MUST NOT include short_channel_id for the final node.
2019-09-05 09:32:03 -07:00
Conner Fromknecht
aefec9b10f
tlv: return parsed types from DecodeWithParsedTypes
This commit adds an additional return value to
Stream.DecodeWithParsedTypes, which returns the set of types that were
encountered during decoding. The set will contain all known types that
were decoded, as well as unknown odd types that were ignored.

The rationale for the return value (rather than an internal member) is
so that the stream remains stateless.

This return value can be used by callers during decoding to make
assertions as to whether specific types were included in the stream.
This is need, for example, when parsing onion payloads where certain
fields must be included/omitted depending on the hop type.

The original Decode method would incur the additional performance hit of
needing to track the parsed types, so we can selectively enable this
functionality when a decoder requires it by using a helper which
conditionally tracks the parsed types.
2019-09-05 09:30:37 -07:00
Joost Jager
e54b24289f
htlcswitch: move hop iterator into htlcswitch/hop package
Prepares for onion blob decoding outside of htlcswitch.
2019-09-05 15:30:31 +02:00
Conner Fromknecht
138b0798f5
htlcswitch/iterator: use hop.Payload constructors 2019-09-05 01:35:24 -07:00
Conner Fromknecht
378e0558c5
htlcswitch/hop: move hop.Exit and hop.Source to hop pkg 2019-09-05 01:35:23 -07:00
Conner Fromknecht
fc0e4be4d8
htlcswitch+hop: move ForwardingInfo to hop.ForwaringInfo 2019-09-05 01:35:23 -07:00
Conner Fromknecht
83d2112e8b
htlcswitch/hop: move NetworkHop to hop.Network 2019-09-05 01:35:20 -07:00
Olaoluwa Osuntokun
866867a4b0
Merge pull request #3401 from wpaulino/channel-initiator-max-fee
htlcswitch: avoid proposing fee updates exceeding max fee allowed
2019-09-04 20:38:52 -07:00
Olaoluwa Osuntokun
00682584aa
Merge pull request #3441 from cfromknecht/truncated-sid
htlcswitch+routing: omit next_hop_id in final hop payload
2019-09-04 19:55:38 -07:00
Olaoluwa Osuntokun
7eca7b02a6
Merge pull request #3390 from joostjager/invoice-circuits
channeldb+cnct+invoices: track invoice htlcs
2019-09-04 19:51:37 -07:00