Split into file-per-class

utils.js

@@ -0,0 +1,8 @@
+function randStr32() {
+  let num = Math.floor(Math.random() * Math.pow(2, 32));
+  return num.toString(16).padStart(8, '0');
+}
+
+function randStr64() {
+  return randStr32() + randStr32();
+}