In this commit, we add the `source_nodes` table. It points to entries in
the `nodes` table. This table will store one entry per protocol version
that we are announcing a node_announcement on.
With this commit, we can run the TestSourceNode unit test against our
SQL backends.
In this commit we add the necessary SQL queries and then implement the
SQLStore's NodeUpdatesInHorizon method. This lets us run the
TestNodeUpdatesInHorizon unit tests against SQL backends.
In this commit, we add the various sqlc queries that we need in order
to implement the following V1Store methods:
- AddLightningNode
- FetchLightningNode
- HasLightningNode
- AddrsForNode
- DeleteLightningNode
- FetchNodeFeatures
These are implemented by SQLStore which then lets us use the SQLStore
backend for the following unit tests:
- TestNodeInsertionAndDeletion
- TestLightningNodePersistence
Here, we use the new options to initialise the reject and channel caches
for the SQLStore (as is done for the KVStore) and also the channel and
node batch schedulers.
In this commit, we implement the postgres and sqlite versions of the
NewTestDB function. We add the various build flags so that only one of
the three versions of this function can be active at a time.
We also introduce the SQLStore struct which is the SQL implementation of
the V1Store interface.
NOTE: it currently temporarily embeds the KVStore struct so that we can
implement the V1Store interface incrementally. For any method not
implemented, things will fall back to the KVStore. This is ONLY the
case for the time being while this struct is purely used in unit tests
only. Once all the methods have been implemented, the KVStore field will
be removed from the SQLStore struct.
