Commit Graph

5 Commits

Author SHA1 Message Date
Olaoluwa Osuntokun
e6d46f681b
discovery: if gossipSyncer is shutting down, don't filter messages 2018-06-04 17:18:54 -07:00
Olaoluwa Osuntokun
a9340d22c4 discovery: ensure stopping/starting a gossipSyncer is idempotent 2018-06-04 17:18:07 -07:00
Olaoluwa Osuntokun
994d9cf7e4
discovery: attempt to request the full chan ann for stray chan updates
In this commit, we extend the AuthenticatedGossiper to take advantage of
the new query features in the case that it gets a channel update w/o
first receiving the full channel announcement. If this happens, we'll
attempt to find a syncer that's fully synced, and request the channel
announcement from it.
2018-05-31 16:31:01 -07:00
Olaoluwa Osuntokun
6a6700e629
discovery: add new SyncState method to gossipSyncer
This new method allows outside callers to sample the current state of
the gossipSyncer in a concurrent-safe manner. In order to achieve this,
we now only modify the g.state variable atomically.
2018-05-31 16:31:00 -07:00
Olaoluwa Osuntokun
5789ef7c10
discovery: add new gossipSyncer struct to manage sync state for each peer
In this commit, introduce a new struct, the gossipSyncer. The role of
this struct is to encapsulate the state machine required to implement
the new gossip query range feature recently added to the spec. With this
change, each peer that knows of this new feature will have a new
goroutine that will be managed by the gossiper.

Once created and started, the gossipSyncer will start to progress
through each possible state, finally ending at the chansSynced stage. In
this stage, it has synchronized state with the remote peer, and is
simply awaiting any new messages from the gossiper to send directly to
the peer. Each message will only be sent if the remote peer actually has
a set update horizon, and the message isn't before or after that
horizon.

A set of unit tests has been added to ensure that two state machines
properly terminate and synchronize channel state.
2018-05-31 16:30:53 -07:00