Commit Graph

162 Commits

Author SHA1 Message Date
orbitalturtle
08750f180b multi: deprecate IncorrectHtlcAmount onion error
In this commit, we deprecate the `IncorrectHtlcAmount` onion error.
We'll still decode this error to use when retrying paths, but we'll no
longer send this ourselves. The `UnknownPaymentHash` error has been
amended to also include the value of the payment as well. This allows us
to worry about one less error.
2019-01-29 18:21:13 -08:00
Valentine Wallace
cced754659
routing/router: when applying onion failure channel update, set max htlc
In this commit, we ensure that when we update an edge
as a result of a ChannelUpdate being returned from an
onion failure, the max htlc portion of the channel update
is included in the edge update.
2019-01-22 08:42:29 +01:00
Valentine Wallace
15168c391e
discovery+routing: validate msg flags and max htlc in ChannelUpdates
In this commit, we alter the ValidateChannelUpdateAnn function in
ann_validation to validate a remote ChannelUpdate's message flags
and max HTLC field. If the message flag is set but the max HTLC
field is not set or vice versa, the ChannelUpdate fails validation.

Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-01-22 08:42:27 +01:00
Valentine Wallace
0fd6004958
multi: partition lnwire.ChanUpdateFlag into ChannelFlags and MessageFlags
In this commit:

* we partition lnwire.ChanUpdateFlag into two (ChanUpdateChanFlags and
ChanUpdateMsgFlags), from a uint16 to a pair of uint8's

* we rename the ChannelUpdate.Flags to ChannelFlags and add an
additional MessageFlags field, which will be used to indicate the
presence of the optional field HtlcMaximumMsat within the ChannelUpdate.

* we partition ChannelEdgePolicy.Flags into message and channel flags.
This change corresponds to the partitioning of the ChannelUpdate's Flags
field into MessageFlags and ChannelFlags.

Co-authored-by: Johan T. Halseth <johanth@gmail.com>
2019-01-22 08:42:26 +01:00
Conner Fromknecht
a5b22788bf
routing/router: avoid naked spew of channel policies 2019-01-09 23:54:41 -08:00
Johan T. Halseth
81fe6e73ed
router+graph: return ErrGraphNodesNotFound if no nodes to prune
Avoids creating a bucket unneccessarily.
2018-12-06 10:22:15 +01:00
Joost Jager
3ed16837e4
routing: prune channels unidirectional
In this commit we introduce pruning of channel edges instead of channels.
Channel failures apply to a single direction and it is unnecessarily
restricting to prune both directions.
2018-12-05 14:39:23 +01:00
Joost Jager
8b8e82a171
routing: remove route hop maps
Hop maps were used in a test to verify the population of the hop map
itself and further only in a single function (getFailedChannelID).
Rewrote that function and removed the hop maps completely.
2018-12-05 14:39:23 +01:00
Olaoluwa Osuntokun
5075394617
Merge pull request #1706 from joostjager/errorprocessing
routing: make routing retry behaviour consistent
2018-12-03 18:29:07 -08:00
Joost Jager
b6ce03e569
routing: make routing retry behaviour consistent
Fixes the following issues:
- If the channel update of FailFeeInsufficient contains an invalid channel
  update, it is not possible to properly add to the failed channels set.
- FailAmountBelowMinimum may apply a channel update, but does not retry.
- FailIncorrectCltvExpiry immediately prunes the vertex without
  trying one more time.

In this commit, the logic for all three policy related errors is
aligned.
2018-12-03 13:23:27 +01:00
Olaoluwa Osuntokun
1fd3aac925
multi: switch from bolt packge to bbolt package for all imports 2018-11-29 20:33:49 -08:00
Joost Jager
6ba1144528
routing: move failed channels map into payment session
This is a small preparatory step towards moving mission control logic
out of router and reusing the acquired routing result data.
2018-11-29 10:31:38 +01:00
Joost Jager
71037969b7
routing: remove pruneVertexFailure function 2018-11-29 10:31:38 +01:00
Joost Jager
aca136a91c
routing: remove unused pruneVertexFailure parameters 2018-11-29 10:31:38 +01:00
Joost Jager
dd7e2e9e04
routing: move logging into applyChannelUpdate
To remove code duplicated at all call sites to check err and log.
2018-11-29 10:31:38 +01:00
Wilmer Paulino
4f45e339f1
discovery+routing: add FetchLightningNode to ChannelGraphSource interface 2018-11-11 17:48:05 -08:00
Wilmer Paulino
18ecb31983
routing/router: extend ChannelGraphSource interface with IsPublicNode
method
2018-10-24 17:28:54 -07:00
Olaoluwa Osuntokun
fbd91feace
Merge pull request #1888 from joostjager/routestruct
lnrpc+routing: fix unmarshallRoute and simplify route structure
2018-10-23 17:07:23 -07:00
Joost Jager
1d97cf1229
htlcswitch+routing: implement expiry_too_far failure
In this commit we add a check to HtlcSatifiesPolicy to verify that the
time lock for the outgoing htlc that is requested in the onion packet
isn't too far in the future.

Without this check, anyone could force an unreasonably long time lock on
the forwarding node.
2018-10-15 08:51:08 +02:00
Joost Jager
a779004a18
lnrpc+routing: fix issues with missing data in unmarshallRoute
In this commit the dependency of unmarshallRoute on edge policies being
available is removed. Edge policies may be unknown and reported as nil.
SendToRoute does not need the policies, but it does need pubkeys of the
route hops. In this commit, unmarshallRoute is modified so that it
takes the pubkeys from edgeInfo instead of channelEdgePolicy.

In addition to this, the route structure is simplified. No more connection
to the database at that point. Fees are determined based on incoming and
outgoing amounts.
2018-10-13 22:59:23 +02:00
Joost Jager
a7fec827cc
routing: validate channel update in failure message 2018-09-11 20:12:09 +02:00
Conner Fromknecht
1e473b2364
routing/router: add assume chan valid 2018-09-03 20:15:12 -07:00
Johan T. Halseth
4b04e1afd1
routing: return ErrRejected if found in reject cache
We make sure to return an error other than ErrIgnored, as ErrIgnored is
expected to only be returned for updates where we already have the
necessary information in the database.

In case of a channel ID found in the rejectCache, there was a
possibility that we had rejected an invalid update for this channel
earlier, and when attempting to add the current update we wouldn't
distinguish the failure to add from an outdated/ignored update.
2018-08-23 07:40:40 +02:00
Johan T. Halseth
18e680f192
router: simplify edge outdated logic, return ErrOutdated if old. 2018-08-23 07:40:39 +02:00
Wilmer Paulino
6c903393e5 router+server: use first hop channel id rather than node key 2018-08-20 21:04:52 -07:00
Joost Jager
3e7473f4f0 routing: backward searching 2018-08-09 20:23:40 -07:00
Joost Jager
6c918a1806 channeldb: store unknown policies in database
The commit ensures that for every channel, there will always
be two entries in the edges bucket. If the policy from one or
both ends of the channel is unknown, it is marked as such.

This allows efficient lookup of incoming edges. This is
required for backwards payment path finding.
2018-08-09 20:23:40 -07:00
Olaoluwa Osuntokun
8c0a151cec
routing: update UTXO verification to use new interface, graph pruning too 2018-07-31 21:28:55 -07:00
Olaoluwa Osuntokun
a6c814010c
routing: exit gracefully if generateSphinxPacket is passed a nil set of hops 2018-07-30 13:41:06 -07:00
Olaoluwa Osuntokun
ef56f76200
routing: demote channel update logging to trace 2018-07-23 17:01:39 -07:00
Olaoluwa Osuntokun
2e75499787
channeldb+routing: move adding shell nodes into db txn of AddChannelEdge
In this commit, we fix a slight race condition that can occur when we go
to add a shell node for a node announcement, but then right afterwards,
a new block arrives that causes us to prune an unconnected node. To
ensure this doesn't happen, we now add shell nodes within the same db
transaction as AddChannelEdge. This ensures that the state is fully
consistent and shell nodes will be added atomically along with the new
channel edge.

As a result of this change, we no longer need to add shell nodes within
the ChannelRouter, as the database will take care of this operation as
it should.
2018-07-22 21:02:53 -07:00
Olaoluwa Osuntokun
f8cbe34e93
routing: prune nodes from the channel graph on start up 2018-07-21 19:52:26 -07:00
Olaoluwa Osuntokun
6f60f139f4 multi: switch over import paths from roasbeef/* to btcsuite/* 2018-07-13 17:05:39 -07:00
Olaoluwa Osuntokun
39c1f46f85
routing: new newLogClosure to delay spew evaluation until log print time
In this commit, we update the generateSphinxPacket to use newLogClosure
to delay the spew evaluation until log print time. Before this commit,
even if we weren't on the trace logging level, the spew call would
always be evaluated.
2018-06-30 17:14:28 -05:00
Wilmer Paulino
ddf8f2cb01
routing: allow specifying a fee limit during route construction 2018-06-12 18:14:48 -07:00
Wilmer Paulino
6a6de812ba
routing: denote a payment's fee limit in millisatoshis instead 2018-06-12 18:14:47 -07:00
Sebastian Delgado
6746609ec6
Add constant and percentage-based fee limits to payments
- Extend SendRequest and QueryRoutesRequest protos
- newRoute function takes fee limit and cuts off routes that exceed it
- queryRoutes, payInvoice and sendPayment commands take the feeLimit inputs and pass them down to newRoute
- When no feeLimit is included, don't enforce any feeLimits at all (by setting feeLimit to maxValue)
2018-06-12 18:14:43 -07:00
Olaoluwa Osuntokun
eb65b0cd5a
routing: check to see if pubkey is nil before logging in sendPayment
In this commit, we now need to check to see if the pubkey is nil as if
the user specified a set of manual routes, then the dest pubkey would be
empty.
2018-06-06 20:45:56 -07:00
Olaoluwa Osuntokun
0113035f6d
routing: add new NewPaymentSessionFromRoutes function instead of interface
In this commit, we modify the recent refactoring of the mission control
sub-system to overload the existing payment session, rather than create
a brand new one. This allows us to re-use more of the existing logic, and
also feedback into mission control the failures incurred by any user
selected routes.
2018-06-06 20:45:56 -07:00
t4sk
53eb396ae9 routing/router: add SendToRoute 2018-06-06 20:45:00 -07:00
maurycy
3be08e69cf multi: 64bit aligment of atomic vars on arm/x86-32 2018-06-04 20:02:34 -07:00
Olaoluwa Osuntokun
f494433cbf
routing+server: add new QueryBandwidth method to reduce outbound failures
In this commit, we introduce a new method to the channel router's config
struct: QueryBandwidth. This method allows the channel router to query
for the up-to-date available bandwidth of a particular link. In the case
that this link emanates from/to us, then we can query the switch to see
if the link is active (if not bandwidth is zero), and return the current
best estimate for the available bandwidth of the link. If the link,
isn't one of ours, then we can thread through the total maximal
capacity of the link.

In order to implement this, the missionControl struct will now query the
switch upon creation to obtain a fresh bandwidth snapshot. We take care
to do this in a distinct db transaction in order to now introduced a
circular waiting condition between the mutexes in bolt, and the channel
state machine.

The aim of this change is to reduce the number of unnecessary failures
during HTLC payment routing as we'll now skip any links that are
inactive, or just don't have enough bandwidth for the payment. Nodes
that have several hundred channels (all of which in various states of
activity and available bandwidth) should see a nice gain from this w.r.t
payment latency.
2018-05-14 16:23:54 -07:00
Conner Fromknecht
eaa8cdf916
routing/router: improve validation barrier shutdown
This commit improves the shutdown of the router's
pending validation tasks, by ensuring the pending
tasks exit early if the validation barrier
receives a shutdown request.

Currently, any goroutines blocked by WaitForDependants
will continue execution after a shutdown is signaled.
This may lead to unnexpected behavior as the relation
between updates is no longer upheld. It also has the
side effect of slowing down shutdown, since we
continue to process the remaining updates.

To remedy this, WaitForDependants now returns an error
that signals if a shutdown was requested. The blocked
goroutines can exit early upon seeing this error,
without also signaling completion of their task to
the dependent tasks, which should will now properly
wait to read the validation barrier's quit signal.
2018-05-08 16:32:08 -07:00
Olaoluwa Osuntokun
bd9f1b597e
routing: prune edges instead of vertexes in response to an FailUnknownNextPeer error
In this commit we fix an lingering bug in the Mission Control logic we
execute in response to the FailUnknownNextPeer error. Historically, we
would treat this as the _next_ node not being online. As a result, we
would then prune away the vertex from the current reachable graph all
together. It was recently realized, that this would at times be a bit
_tooo_ aggressive if the channel we attempt to route over was faulty,
down, or the incoming node had connectivity issues with the outgoing
node.

In light of this realization, we'll now instead only prune the _edge_
that we attempted to route over. This ensures that we'll continue to
explore the possible edges. Additionally, this guards us against failure
modes where nodes report FailUnknownNextPeer to other nodes in an
attempt to more closely control our retry logic.

This change is a stop gap on the path to a more intelligent set of
autopilot heuristics.

Fixes #1114.
2018-04-23 17:51:02 -07:00
Wilmer Paulino
7965247db1
routing: add additionalEdges field to a missionControl's paymentSession
In this commit, we introduce the ability for payment sessions to store
an additional set of edges that can be used to assist a payment in
successfully reaching its destination.
2018-04-20 04:01:31 -04:00
Wilmer Paulino
5ddee85479
routing: prevent logging the public key params within the routing hints 2018-04-20 04:01:30 -04:00
Wilmer Paulino
1e5659e5f4
routing: introduce routing hints to lightning payments
In this commit, we add a new field of routing hints to payments over the
Lightning Network. These routing hints can later be used within the path
finding algorithm in order to craft a path that will reach the
destination succesfully.
2018-04-20 04:01:29 -04:00
Dimitris Tsapakidis
4009f7f874 multi: fix typos in comments 2018-04-17 19:03:27 -07:00
practicalswift
663c396235 multi: fix a-vs-an typos 2018-04-17 19:02:04 -07:00
Olaoluwa Osuntokun
a6ffe999c6
routing: prune vertex, not ege after repeated FeeInsufficientErrors
In this commit, we modify the way we handle FeeInsufficientErrors to
more aggressively route around nodes that repeatedly return the same
error to us. This will ensure we skip older nodes on the network which
are running a buggier older version of lnd. Eventually most nodes will
upgrade to this new version, making this change less needed.

We also update the existing test to properly use a multi-hop route to
ensure that we route around the offending node.
2018-04-06 14:52:02 -07:00