graph/db+autopilot: remove NodeRTx FetchNode method

In this commit, we remove the need for the NodeRTx interface to have the
FetchNode method on it.

graph/db/interfaces.go

@@ -25,12 +25,6 @@ type NodeRTx interface {
 	// the same transaction used to fetch the node.
 	ForEachChannel(func(*models.ChannelEdgeInfo, *models.ChannelEdgePolicy,
 		*models.ChannelEdgePolicy) error) error
-
-	// FetchNode fetches the node with the given pub key under the same
-	// transaction used to fetch the current node. The returned node is also
-	// a NodeRTx and any operations on that NodeRTx will also be done under
-	// the same transaction.
-	FetchNode(node route.Vertex) (NodeRTx, error)
 }
 
 // NodeTraverser is an abstract read only interface that provides information

graph/db/kv_store.go

@@ -4902,20 +4902,6 @@ func (c *chanGraphNodeTx) Node() *models.LightningNode {
 	return c.node
 }
 
-// FetchNode fetches the node with the given pub key under the same transaction
-// used to fetch the current node. The returned node is also a NodeRTx and any
-// operations on that NodeRTx will also be done under the same transaction.
-//
-// NOTE: This is a part of the NodeRTx interface.
-func (c *chanGraphNodeTx) FetchNode(nodePub route.Vertex) (NodeRTx, error) {
-	node, err := c.db.FetchLightningNodeTx(c.tx, nodePub)
-	if err != nil {
-		return nil, err
-	}
-
-	return newChanGraphNodeTx(c.tx, c.db, node), nil
-}
-
 // ForEachChannel can be used to iterate over the node's channels under
 // the same transaction used to fetch the node.
 //

graph/db/sql_store.go

@@ -865,23 +865,6 @@ func (s *sqlGraphNodeTx) ForEachChannel(cb func(*models.ChannelEdgeInfo,
 	return forEachNodeChannel(ctx, s.db, s.cfg, s.id, cb)
 }
 
-// FetchNode fetches the node with the given pub key under the same transaction
-// used to fetch the current node. The returned node is also a NodeRTx and any
-// operations on that NodeRTx will also be done under the same transaction.
-//
-// NOTE: This is a part of the NodeRTx interface.
-func (s *sqlGraphNodeTx) FetchNode(nodePub route.Vertex) (NodeRTx, error) {
-	ctx := context.TODO()
-
-	id, node, err := getNodeByPubKey(ctx, s.db, nodePub)
-	if err != nil {
-		return nil, fmt.Errorf("unable to fetch V1 node(%x): %w",
-			nodePub, err)
-	}
-
-	return newSQLGraphNodeTx(s.db, s.cfg, id, node), nil
-}
-
 // ForEachNodeDirectedChannel iterates through all channels of a given node,
 // executing the passed callback on the directed edge representing the channel
 // and its incoming policy. If the callback returns an error, then the iteration