graph/db: move gossip versions up one layer

Update some of the node related graph CRUD methods to take a version
rather than hardcoding them in the SQLStore layer. Move the version up
one layer instead. This will make it easier to make it configurable
later on.

graph/db/interfaces.go

@@ -31,7 +31,14 @@ type NodeTraverser interface {
 // Store represents the main interface for the channel graph database for all
 // channels and nodes gossiped via the V1 gossip protocol as defined in BOLT 7.
 type Store interface { //nolint:interfacebloat
-	NodeTraverser
+	// ForEachNodeDirectedChannel calls the callback for every channel of
+	// the given node.
+	ForEachNodeDirectedChannel(nodePub route.Vertex,
+		cb func(channel *DirectedChannel) error, reset func()) error
+
+	// FetchNodeFeatures returns the features of the given node.
+	FetchNodeFeatures(v lnwire.GossipVersion,
+		nodePub route.Vertex) (*lnwire.FeatureVector, error)
 
 	// AddNode adds a vertex/node to the graph database. If the
 	// node is not in the database from before, this will add a new,
@@ -45,7 +52,7 @@ type Store interface { //nolint:interfacebloat
 	// AddrsForNode returns all known addresses for the target node public
 	// key that the graph DB is aware of. The returned boolean indicates if
 	// the given node is unknown to the graph DB or not.
-	AddrsForNode(ctx context.Context,
+	AddrsForNode(ctx context.Context, v lnwire.GossipVersion,
 		nodePub *btcec.PublicKey) (bool, []net.Addr, error)
 
 	// ForEachSourceNodeChannel iterates through all channels of the source
@@ -100,11 +107,13 @@ type Store interface { //nolint:interfacebloat
 
 	// LookupAlias attempts to return the alias as advertised by the target
 	// node.
-	LookupAlias(ctx context.Context, pub *btcec.PublicKey) (string, error)
+	LookupAlias(ctx context.Context, v lnwire.GossipVersion,
+		pub *btcec.PublicKey) (string, error)
 
 	// DeleteNode starts a new database transaction to remove a
 	// vertex/node from the database according to the node's public key.
-	DeleteNode(ctx context.Context, nodePub route.Vertex) error
+	DeleteNode(ctx context.Context, v lnwire.GossipVersion,
+		nodePub route.Vertex) error
 
 	// NodeUpdatesInHorizon returns all the known lightning node which have
 	// an update timestamp within the passed range. This method can be used
@@ -116,8 +125,8 @@ type Store interface { //nolint:interfacebloat
 	// FetchNode attempts to look up a target node by its identity
 	// public key. If the node isn't found in the database, then
 	// ErrGraphNodeNotFound is returned.
-	FetchNode(ctx context.Context, nodePub route.Vertex) (*models.Node,
-		error)
+	FetchNode(ctx context.Context, v lnwire.GossipVersion,
+		nodePub route.Vertex) (*models.Node, error)
 
 	// HasV1Node determines if the graph has a vertex identified by
 	// the target node identity public key in the V1 graph. If the node
@@ -131,7 +140,8 @@ type Store interface { //nolint:interfacebloat
 
 	// HasNode determines if the graph has a vertex identified by
 	// the target node identity public key.
-	HasNode(ctx context.Context, nodePub [33]byte) (bool, error)
+	HasNode(ctx context.Context, v lnwire.GossipVersion,
+		nodePub [33]byte) (bool, error)
 
 	// IsPublicNode is a helper method that determines whether the node with
 	// the given public key is seen as a public node in the graph from the
@@ -334,7 +344,8 @@ type Store interface { //nolint:interfacebloat
 	// treated as the center node within a star-graph. This method may be
 	// used to kick off a path finding algorithm in order to explore the
 	// reachability of another node based off the source node.
-	SourceNode(ctx context.Context) (*models.Node, error)
+	SourceNode(ctx context.Context, v lnwire.GossipVersion) (*models.Node,
+		error)
 
 	// SetSourceNode sets the source node within the graph database. The
 	// source node is to be used as the center of a star-graph within path