Properly unwrap StateEvent state before calling handler

src/http/routing/SocketRouteBuilder.ts

@@ -93,7 +93,9 @@ export class SocketRouteBuilder {
      */
     async build(request: Request, ws: WebSocketBus): Promise<void> {
         await this.handlers.promiseMap(handler => {
-            ws.subscribe(handler.eventClass, handler.handler.apply(request))
+            ws.subscribe(handler.eventClass, (event: StateEvent<JSONState>) => {
+                return handler.handler.apply(request)(event.getState())
+            })
         })
 
         if ( this.connectionCallback ) {