Additional async rewrite

lib/Promises.js

@@ -0,0 +1,20 @@
+class Promises {
+    static createTimeout(timeoutMs, timeoutMsg) {
+        let cancel = null;
+        const wrapped = new Promise((res, rej) => {
+            const timeout = setTimeout(
+                () => {
+                    rej(new Error(timeoutMsg + " - Timed out after " + timeoutMs + "ms"));
+                },
+                timeoutMs
+            );
+            cancel = () => {
+                clearTimeout(timeout);
+            };
+        });
+        wrapped.cancel = cancel;
+        return wrapped;
+    }
+}
+
+module.exports = Promises;