Commit Graph

11 Commits

Author SHA1 Message Date
Wilmer Paulino
aa7c2e6d47
autopilot: add OnChannelPendingOpen state update 2018-08-16 20:22:40 -07:00
Wilmer Paulino
956acdfa14
autopilot/agent_test: pass in agent's quit chan to heuristic
In this commit, we alter our mock heuristic to also take in a quit chan.
It's possible that at the end of a test the agent is blocked on a
NeedMoreChans/Select call as their mock implementations use channels. To
prevent this, we use the agent's quit chan so that the heuristic can
safely exit once the agent does.
2018-08-16 20:19:33 -07:00
Wilmer Paulino
454b549c7e
autopilot+pilot: refactor connection logic out of OpenChannel
In this commit, we refactor the existing connection logic outside of the
ChanController's OpenChannel method. We do this as previously it was
possible for peers to stall us while attempting to connect to them. In
order to remedy this, we now attempt to connect the peer before tracking
them in our set of pending opens.
2018-08-16 20:17:03 -07:00
Wilmer Paulino
89325a13b7
autopilot+config: support opening private channels with autopilot agent 2018-08-10 20:45:59 -07:00
Olaoluwa Osuntokun
6f60f139f4 multi: switch over import paths from roasbeef/* to btcsuite/* 2018-07-13 17:05:39 -07:00
Olaoluwa Osuntokun
ce2d5a2156
autopilot: limit the number of outstanding channel open goroutines
In this commit, we fix an existing bug that would at times cause us to
spiral out of control and potentially created thousands of outbound
connections. Our fix is simple: limit the total number of outstanding
channel establishment attempts. Without this limit, we have no way to
bound the number of active goroutines.

Fixes #772.
2018-03-10 16:53:02 -08:00
Olaoluwa Osuntokun
9f52372cd2
autopilot: modify interfaces to specify *exactly* how many chans to open
In this commit, we fix a regression introduced by a recent change which
would allow the agent to detect a channel as failed, and blacklist the
node, promising faster convergence with the ideal state of the
heuristic.

The source of this bug is that we would use the set of blacklisted
nodes in order to compute how many additional channels we should open.
If 10 failures happened, then we would think that we had opened up 10
channels, and stop much earlier than we actually should.

To fix this, while ensuring we don’t retry to failed peers, the
NeedMoreChans method will now return *how* anymore channels to open,
and the Select method will take in how many channels it should try to
open *exactly*.
2018-02-08 20:08:18 -08:00
Olaoluwa Osuntokun
cb48a5827a
autopilot: update API usage to account for recent channeldb changes 2018-02-06 20:14:32 -08:00
Simon Horlick
a43d7d3532 autopilot: Make autopilot aware of channel open failures 2018-01-27 18:35:31 -08:00
Olaoluwa Osuntokun
711b695a2f
autopilot: add tracking of pending channel state
This commit adds tracking of the pending channels state within the
autopilot.Agent. This fixes a class of bugs which was discovered during
the latest test net block storm wherein the Agent would attempt to
repeatedly attach to the same node due to rapid closure of other
channels.

In this commit we fix this issue by ensuring that we always factor in
the pending channel state when querying the heuristic w.r.t if we need
more channels, and if so to which nodes should be attached to.
2017-08-15 18:23:58 -07:00
Olaoluwa Osuntokun
306c4aef8e
autopilot: "Look ma no hands!", introducing autopilot mode
This commit introduces the initial implementation of the autopilot
mode. Autopilot is new mode within lnd that enables automatic channel
management. This means that if enabled lnd will attempt to
automatically manage channels according to a set of heuristic defined
within the main configuration for autopilot.Agent instance.

The autopilot.Agent implements a simple closed control loop. It takes
in external signals such as wallet balance updates, new open channel,
and channels that are now closed the updates its internal state. With
each external trigger it will consult the registered
AttachmentHeuristic to decide: if it needs to open any more channels,
and if so how much it should use to open the channels, ultimately
returning a set of recommended AttachmentDirectives. The
autopilot.Agent loop will then take those attempt to establish
connection, and go back in waiting for a new external signal.

With this first implementation the default heuristic is the
ConstrainedPrefAttachment implementation of AttachmentHeuristic. Given
a min and max channel size, a limit on the number of channels, and the
percentage of wallet funds to allocate to channels, it will attempt to
execute a heuristic drive by the Barabási–Albert model model in order
to attempt to drive the global graph towards a scale free topology.

This is commit implements a foundational layer for future simulations,
optimization, and additional heuristics.
2017-08-10 21:14:55 -07:00