diff --git a/crates/sui-graphql-rpc/src/extensions/query_limits_checker.rs b/crates/sui-graphql-rpc/src/extensions/query_limits_checker.rs
index 6159cd8405c8b3..715241653542ba 100644
--- a/crates/sui-graphql-rpc/src/extensions/query_limits_checker.rs
+++ b/crates/sui-graphql-rpc/src/extensions/query_limits_checker.rs
@@ -23,9 +23,16 @@ use tokio::sync::Mutex;
 use tracing::info;
 use uuid::Uuid;
 
+pub(crate) const CONNECTION_FIELDS: [&str; 2] = ["edges", "nodes"];
+
 /// Extension factory for adding checks that the query is within configurable limits.
 pub(crate) struct QueryLimitsChecker;
 
+#[derive(Debug, Default)]
+struct QueryLimitsCheckerExt {
+    validation_result: Mutex<Option<ValidationRes>>,
+}
+
 /// Only display usage information if this header was in the request.
 pub(crate) struct ShowUsage;
 
@@ -39,13 +46,13 @@ struct ValidationRes {
     query_payload: u32,
 }
 
-#[derive(Debug, Default)]
-struct QueryLimitsCheckerExt {
-    validation_result: Mutex<Option<ValidationRes>>,
+#[derive(Debug)]
+struct ComponentCost {
+    pub input_nodes: u32,
+    pub output_nodes: u32,
+    pub depth: u32,
 }
 
-pub(crate) const CONNECTION_FIELDS: [&str; 2] = ["edges", "nodes"];
-
 impl ShowUsage {
     pub(crate) fn name() -> &'static HeaderName {
         &LIMITS_HEADER
@@ -60,25 +67,6 @@ impl ExtensionFactory for QueryLimitsChecker {
     }
 }
 
-#[derive(Debug)]
-struct ComponentCost {
-    pub input_nodes: u32,
-    pub output_nodes: u32,
-    pub depth: u32,
-}
-
-impl std::ops::Add for ComponentCost {
-    type Output = Self;
-
-    fn add(self, rhs: Self) -> Self::Output {
-        Self {
-            input_nodes: self.input_nodes + rhs.input_nodes,
-            output_nodes: self.output_nodes + rhs.output_nodes,
-            depth: self.depth + rhs.depth,
-        }
-    }
-}
-
 #[async_trait::async_trait]
 impl Extension for QueryLimitsCheckerExt {
     async fn request(&self, ctx: &ExtensionContext<'_>, next: NextRequest<'_>) -> Response {
@@ -210,6 +198,18 @@ impl Extension for QueryLimitsCheckerExt {
     }
 }
 
+impl std::ops::Add for ComponentCost {
+    type Output = Self;
+
+    fn add(self, rhs: Self) -> Self::Output {
+        Self {
+            input_nodes: self.input_nodes + rhs.input_nodes,
+            output_nodes: self.output_nodes + rhs.output_nodes,
+            depth: self.depth + rhs.depth,
+        }
+    }
+}
+
 /// Parse the selected fields in one operation and check if it conforms to configured limits.
 fn analyze_selection_set(
     limits: &Limits,