diff --git a/chain/chain.go b/chain/chain.go
index 58f77cc..7fb6859 100644
--- a/chain/chain.go
+++ b/chain/chain.go
@@ -34,7 +34,7 @@ func (c *Chain) Route(network, address string) (r *Route) {
 			break
 		}
 
-		node := group.filter(address).Next()
+		node := group.FilterAddr(address).Next()
 		if node == nil {
 			return
 		}
diff --git a/chain/node.go b/chain/node.go
index a615f9b..957db27 100644
--- a/chain/node.go
+++ b/chain/node.go
@@ -41,6 +41,10 @@ func (g *NodeGroup) AddNode(node *Node) {
 	g.nodes = append(g.nodes, node)
 }
 
+func (g *NodeGroup) Nodes() []*Node {
+	return g.nodes
+}
+
 func (g *NodeGroup) WithSelector(selector Selector) *NodeGroup {
 	g.selector = selector
 	return g
@@ -51,7 +55,7 @@ func (g *NodeGroup) WithBypass(bypass bypass.Bypass) *NodeGroup {
 	return g
 }
 
-func (g *NodeGroup) filter(addr string) *NodeGroup {
+func (g *NodeGroup) FilterAddr(addr string) *NodeGroup {
 	var nodes []*Node
 	for _, node := range g.nodes {
 		if node.Bypass == nil || !node.Bypass.Contains(addr) {