Add type guards for ws order events and ws execution events

src/util/typeGuards.ts

@@ -2,7 +2,7 @@
  * Use type guards to narrow down types with minimal efforts.
  */
 
-import { WSOrderbookEventV5 } from '../types/websocket.events';
+import { WSAccountOrderEventV5, WSExecutionEventV5, WSOrderbookEventV5 } from '../types/websocket.events';
 
 /**
  * Type guard to detect a V5 orderbook event (delta & snapshots)
@@ -27,3 +27,43 @@ export function isWsOrderbookEventV5(
     event['topic'].startsWith('orderbook')
   );
 }
+
+/**
+ * Type guard to detect a V5 order event.
+ *
+ * @param event
+ * @returns
+ */
+export function isWsAccountOrderEventV5(
+  event: unknown,
+): event is WSAccountOrderEventV5 {
+  if (
+    typeof event !== 'object' ||
+    !event ||
+    typeof event['topic'] !== 'string'
+  ) {
+    return false;
+  }
+
+  return event['topic'] === 'order';
+}
+
+/**
+ * Type guard to detect a V5 execution event.
+ *
+ * @param event
+ * @returns
+ */
+export function isWsExecutionEventV5(
+  event: unknown,
+): event is WSExecutionEventV5 {
+  if (
+    typeof event !== 'object' ||
+    !event ||
+    typeof event['topic'] !== 'string'
+  ) {
+    return false;
+  }
+
+  return event['topic'] === 'execution';
+}