graph/db: add version parameter to IsPublicNode

diff --git a/graph/builder.go b/graph/builder.go
index 96a7582..1f3309c 100644
--- a/graph/builder.go
+++ b/graph/builder.go
@@ -1330,7 +1330,7 @@ func (b *Builder) IsStaleNode(ctx context.Context, node route.Vertex,
 //
 // NOTE: This method is part of the ChannelGraphSource interface.
 func (b *Builder) IsPublicNode(node route.Vertex) (bool, error) {
-	return b.cfg.Graph.IsPublicNode(node)
+	return b.v1Graph.IsPublicNode(node)
 }
 
 // IsKnownEdge returns true if the graph source already knows of the passed
diff --git a/graph/db/graph.go b/graph/db/graph.go
index 302813f..6c4b0a1 100644
--- a/graph/db/graph.go
+++ b/graph/db/graph.go
@@ -637,7 +637,7 @@ func (c *ChannelGraph) HasV1Node(ctx context.Context,
 
 // IsPublicNode determines whether the node is seen as public in the graph.
 func (c *ChannelGraph) IsPublicNode(pubKey [33]byte) (bool, error) {
-	return c.db.IsPublicNode(pubKey)
+	return c.db.IsPublicNode(lnwire.GossipVersion1, pubKey)
 }
 
 // ForEachChannel iterates through all channel edges stored within the graph.
@@ -861,6 +861,11 @@ func (c *VersionedGraph) DeleteChannelEdges(strictZombiePruning,
 	return err
 }
 
+// IsPublicNode determines whether the node is seen as public in the graph.
+func (c *VersionedGraph) IsPublicNode(pubKey [33]byte) (bool, error) {
+	return c.db.IsPublicNode(c.v, pubKey)
+}
+
 // MakeTestGraph creates a new instance of the ChannelGraph for testing
 // purposes. The backing Store implementation depends on the version of
 // NewTestDB included in the current build.
diff --git a/graph/db/graph_test.go b/graph/db/graph_test.go
index ed6a5f5..2f106dd 100644
--- a/graph/db/graph_test.go
+++ b/graph/db/graph_test.go
@@ -146,6 +146,10 @@ var versionedTests = []versionedTest{
 		name: "partial node",
 		test: testPartialNode,
 	},
+	{
+		name: "node is public",
+		test: testNodeIsPublic,
+	},
 }
 
 // TestVersionedDBs runs various tests against both v1 and v2 versioned
@@ -4125,9 +4129,9 @@ func nextBlockHeight() uint32 {
 	return updateBlock
 }
 
-// TestNodeIsPublic ensures that we properly detect nodes that are seen as
+// testNodeIsPublic ensures that we properly detect nodes that are seen as
 // public within the network graph.
-func TestNodeIsPublic(t *testing.T) {
+func testNodeIsPublic(t *testing.T, v lnwire.GossipVersion) {
 	t.Parallel()
 	ctx := t.Context()
 
@@ -4139,33 +4143,29 @@ func TestNodeIsPublic(t *testing.T) {
 	// We'll need to create a separate database and channel graph for each
 	// participant to replicate real-world scenarios (private edges being in
 	// some graphs but not others, etc.).
-	aliceGraph := MakeTestGraph(t)
-	aliceNode := createTestVertex(t, lnwire.GossipVersion1)
+	aliceGraph := NewVersionedGraph(MakeTestGraph(t), v)
+	aliceNode := createTestVertex(t, v)
 	err := aliceGraph.SetSourceNode(ctx, aliceNode)
 	require.NoError(t, err, "unable to set source node")
 
-	bobGraph := MakeTestGraph(t)
-	bobNode := createTestVertex(t, lnwire.GossipVersion1)
+	bobGraph := NewVersionedGraph(MakeTestGraph(t), v)
+	bobNode := createTestVertex(t, v)
 	err = bobGraph.SetSourceNode(ctx, bobNode)
 	require.NoError(t, err, "unable to set source node")
 
-	carolGraph := MakeTestGraph(t)
-	carolNode := createTestVertex(t, lnwire.GossipVersion1)
+	carolGraph := NewVersionedGraph(MakeTestGraph(t), v)
+	carolNode := createTestVertex(t, v)
 	err = carolGraph.SetSourceNode(ctx, carolNode)
 	require.NoError(t, err, "unable to set source node")
 
-	aliceBobEdge, _ := createEdge(
-		lnwire.GossipVersion1, 10, 0, 0, 0, aliceNode, bobNode,
-	)
-	bobCarolEdge, _ := createEdge(
-		lnwire.GossipVersion1, 10, 1, 0, 1, bobNode, carolNode,
-	)
+	aliceBobEdge, _ := createEdge(v, 10, 0, 0, 0, aliceNode, bobNode)
+	bobCarolEdge, _ := createEdge(v, 10, 1, 0, 1, bobNode, carolNode)
 
 	// After creating all of our nodes and edges, we'll add them to each
 	// participant's graph.
 	nodes := []*models.Node{aliceNode, bobNode, carolNode}
 	edges := []*models.ChannelEdgeInfo{aliceBobEdge, bobCarolEdge}
-	graphs := []*ChannelGraph{aliceGraph, bobGraph, carolGraph}
+	graphs := []*VersionedGraph{aliceGraph, bobGraph, carolGraph}
 	for _, graph := range graphs {
 		for _, node := range nodes {
 			node.LastUpdate = nextUpdateTime()
@@ -4181,7 +4181,7 @@ func TestNodeIsPublic(t *testing.T) {
 	// checkNodes is a helper closure that will be used to assert that the
 	// given nodes are seen as public/private within the given graphs.
 	checkNodes := func(nodes []*models.Node,
-		graphs []*ChannelGraph, public bool) {
+		graphs []*VersionedGraph, public bool) {
 
 		t.Helper()
 
@@ -4212,7 +4212,7 @@ func TestNodeIsPublic(t *testing.T) {
 	}
 	checkNodes(
 		[]*models.Node{aliceNode},
-		[]*ChannelGraph{bobGraph, carolGraph},
+		[]*VersionedGraph{bobGraph, carolGraph},
 		false,
 	)
 
@@ -4240,7 +4240,7 @@ func TestNodeIsPublic(t *testing.T) {
 	// node from both Alice's and Carol's perspective.
 	checkNodes(
 		[]*models.Node{bobNode},
-		[]*ChannelGraph{aliceGraph, carolGraph},
+		[]*VersionedGraph{aliceGraph, carolGraph},
 		false,
 	)
 }
diff --git a/graph/db/interfaces.go b/graph/db/interfaces.go
index 24cfae9..5658fa5 100644
--- a/graph/db/interfaces.go
+++ b/graph/db/interfaces.go
@@ -146,7 +146,7 @@ type Store interface { //nolint:interfacebloat
 	// 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
 	// graph's source node's point of view.
-	IsPublicNode(pubKey [33]byte) (bool, error)
+	IsPublicNode(v lnwire.GossipVersion, pubKey [33]byte) (bool, error)
 
 	// GraphSession will provide the call-back with access to a
 	// NodeTraverser instance which can be used to perform queries against
diff --git a/graph/db/kv_store.go b/graph/db/kv_store.go
index 38b6c97..b3442bd 100644
--- a/graph/db/kv_store.go
+++ b/graph/db/kv_store.go
@@ -4005,7 +4005,13 @@ func (c *KVStore) FetchChannelEdgesByID(chanID uint64) (
 // 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 graph's
 // source node's point of view.
-func (c *KVStore) IsPublicNode(pubKey [33]byte) (bool, error) {
+func (c *KVStore) IsPublicNode(v lnwire.GossipVersion, pubKey [33]byte) (bool,
+	error) {
+
+	if v != lnwire.GossipVersion1 {
+		return false, ErrVersionNotSupportedForKVDB
+	}
+
 	var nodeIsPublic bool
 	err := kvdb.View(c.db, func(tx kvdb.RTx) error {
 		nodes := tx.ReadBucket(nodeBucket)
diff --git a/graph/db/sql_store.go b/graph/db/sql_store.go
index 18ab233..2f0b1c5 100644
--- a/graph/db/sql_store.go
+++ b/graph/db/sql_store.go
@@ -50,6 +50,7 @@ type SQLQueries interface {
 	ListNodesPaginated(ctx context.Context, arg sqlc.ListNodesPaginatedParams) ([]sqlc.GraphNode, error)
 	ListNodeIDsAndPubKeys(ctx context.Context, arg sqlc.ListNodeIDsAndPubKeysParams) ([]sqlc.ListNodeIDsAndPubKeysRow, error)
 	IsPublicV1Node(ctx context.Context, pubKey []byte) (bool, error)
+	IsPublicV2Node(ctx context.Context, pubKey []byte) (bool, error)
 	DeleteUnconnectedNodes(ctx context.Context) ([][]byte, error)
 	DeleteNodeByPubKey(ctx context.Context, arg sqlc.DeleteNodeByPubKeyParams) (sql.Result, error)
 	DeleteNode(ctx context.Context, id int64) error
@@ -2338,13 +2339,23 @@ func (s *SQLStore) ChannelID(chanPoint *wire.OutPoint) (uint64, error) {
 // source node's point of view.
 //
 // NOTE: part of the Store interface.
-func (s *SQLStore) IsPublicNode(pubKey [33]byte) (bool, error) {
+func (s *SQLStore) IsPublicNode(v lnwire.GossipVersion, pubKey [33]byte) (bool,
+	error) {
+
 	ctx := context.TODO()
+	if !isKnownGossipVersion(v) {
+		return false, fmt.Errorf("unsupported gossip version: %d", v)
+	}
 
 	var isPublic bool
 	err := s.db.ExecTx(ctx, sqldb.ReadTxOpt(), func(db SQLQueries) error {
 		var err error
-		isPublic, err = db.IsPublicV1Node(ctx, pubKey[:])
+		switch v {
+		case lnwire.GossipVersion1:
+			isPublic, err = db.IsPublicV1Node(ctx, pubKey[:])
+		case lnwire.GossipVersion2:
+			isPublic, err = db.IsPublicV2Node(ctx, pubKey[:])
+		}
 
 		return err
 	}, sqldb.NoOpReset)