From 6953d870ae9f1bd9fb9fb695dce2545c24a0f391 Mon Sep 17 00:00:00 2001
From: utf-4096 <utf16+github@riseup.net>
Date: Wed, 12 Jul 2023 13:34:52 +0200
Subject: [PATCH] fix: throw an error when login() or logoff() is unexpected

---
 src/Client.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Client.js b/src/Client.js
index 9071703..ee73fef 100644
--- a/src/Client.js
+++ b/src/Client.js
@@ -55,6 +55,10 @@ export class Client extends EventEmitter {
     }
 
     login({ seed }) {
+        if (this.#ws && this.#ws.readyState === WebSocket.OPEN) {
+            throw new Error('already connected')
+        }
+
         const ws = new WebSocket(this.#gateway)
         this.#ws = ws
 
@@ -81,6 +85,10 @@ export class Client extends EventEmitter {
     }
 
     logoff() {
+        if (!this.#ws || this.#ws.readyState !== WebSocket.OPEN) {
+            throw new Error('not connected')
+        }
+
         this.#ws.close()
     }