diff --git a/src/transaction/TraceItem.tsx b/src/transaction/TraceItem.tsx
index 3b6b9ef..4de951a 100644
--- a/src/transaction/TraceItem.tsx
+++ b/src/transaction/TraceItem.tsx
@@ -42,7 +42,7 @@ const TraceItem: React.FC<TraceItemProps> = ({ t, txData, last }) => {
             className={`font-bold ${
               t.type === "STATICCALL"
                 ? "text-red-700"
-                : t.type === "DELEGATECALL"
+                : t.type === "DELEGATECALL" || t.type === "CALLCODE"
                 ? "text-gray-400"
                 : "text-blue-900"
             }`}
diff --git a/src/useErigonHooks.ts b/src/useErigonHooks.ts
index 62b2449..dc7de4e 100644
--- a/src/useErigonHooks.ts
+++ b/src/useErigonHooks.ts
@@ -341,7 +341,10 @@ export const useTraceTransaction = (
       for (let i = 0; i < results.length; i++) {
         results[i].from = provider.formatter.address(results[i].from);
         results[i].to = provider.formatter.address(results[i].to);
-        results[i].value = provider.formatter.bigNumber(results[i].value);
+        results[i].value =
+          results[i].value === null
+            ? null
+            : provider.formatter.bigNumber(results[i].value);
       }
 
       // Build trace tree