Use wasm to decode stake account

explorer/src/components/common/LoadingCard.tsx

@@ -0,0 +1,12 @@
+import React from "react";
+
+export default function LoadingCard() {
+  return (
+    <div className="card">
+      <div className="card-body text-center">
+        <span className="spinner-grow spinner-grow-sm mr-2"></span>
+        Loading
+      </div>
+    </div>
+  );
+}