From f4b0e4433e50567e4cecd34f4a57d0349a27596e Mon Sep 17 00:00:00 2001
From: brobert <borja@brobert.net>
Date: Sat, 20 Sep 2025 18:48:25 +0200
Subject: [PATCH] fix: priorizar participantAlt para sender JID en grupos

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>
---
 src/server.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/server.ts b/src/server.ts
index b6c75bb..ffc44aa 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -233,8 +233,10 @@ export class WebhookServer {
 			return;
 		}
 
-		// Compute sender JID based on chat type
-		const senderRaw = isGroupId(remoteJid) ? participant : remoteJid;
+		// Compute sender JID based on chat type (prefer participantAlt when available due to Baileys change)
+		const senderRaw = isGroupId(remoteJid)
+			? (data.key.participantAlt || participant)
+			: remoteJid;
 
 		// Normalize sender ID for consistency and validation
 		const normalizedSenderId = normalizeWhatsAppId(senderRaw);