fix(baileys): prevent healthy instances from being killed after stream:error 515

When WhatsApp sends stream:error code=515 (Connection Replaced), Baileys
handles the reconnect correctly and fires connection.update with state='open'.
However, WhatsApp then sends a 401 (loggedOut) to clean up the old session
slot, which Evolution API incorrectly treated as a real logout, killing the
newly-connected healthy instance.

The fix tracks when a stream:error 515 node arrives via the CB:stream:error
WebSocket event. If a loggedOut (401) close event fires within 30 seconds of
a 515, it is treated as a transient reconnect rather than a real logout.

Fixes #2498

Author: octo-patch

src/api/integrations/channel/whatsapp/whatsapp.baileys.service.ts

@@ -251,6 +251,7 @@ export class BaileysStartupService extends ChannelStartupService {
   private endSession = false;
   private logBaileys = this.configService.get<Log>('LOG').BAILEYS;
   private eventProcessingQueue: Promise<void> = Promise.resolve();
+  private _lastStream515At = 0;
 
   // Cache TTL constants (in seconds)
   private readonly MESSAGE_CACHE_TTL_SECONDS = 5 * 60; // 5 minutes - avoid duplicate message processing
@@ -426,7 +427,10 @@ export class BaileysStartupService extends ChannelStartupService {
     if (connection === 'close') {
       const statusCode = (lastDisconnect?.error as Boom)?.output?.statusCode;
       const codesToNotReconnect = [DisconnectReason.loggedOut, DisconnectReason.forbidden, 402, 406];
-      const shouldReconnect = !codesToNotReconnect.includes(statusCode);
+      const recentStream515 = Date.now() - this._lastStream515At < 30_000;
+      const shouldReconnect =
+        !codesToNotReconnect.includes(statusCode) ||
+        (statusCode === DisconnectReason.loggedOut && recentStream515);
       if (shouldReconnect) {
         await this.connectToWhatsapp(this.phoneNumber);
       } else {
@@ -715,6 +719,12 @@ export class BaileysStartupService extends ChannelStartupService {
       this.sendDataWebhook(Events.CALL, payload, true, ['websocket']);
     });
 
+    this.client.ws.on('CB:stream:error', (node: any) => {
+      if (node?.attrs?.code === '515') {
+        this._lastStream515At = Date.now();
+      }
+    });
+
     this.phoneNumber = number;
 
     return this.client;