From b5de7b78bc7ae42840ba8516bb2cca199139ef35 Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Mon, 2 Feb 2026 00:14:10 +0900
Subject: [PATCH] prevent panic on AUTH challenge tag (nil or len<2)

---
 helpers.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/helpers.go b/helpers.go
index 69affa5..1e27dc3 100644
--- a/helpers.go
+++ b/helpers.go
@@ -261,7 +261,7 @@ func connectToSingleRelay(
 			for range 5 {
 				if err := relay.Auth(ctx, func(ctx context.Context, authEvent *nostr.Event) error {
 					challengeTag := authEvent.Tags.Find("challenge")
-					if challengeTag[1] == "" {
+					if challengeTag == nil || len(challengeTag) < 2 || challengeTag[1] == "" {
 						return fmt.Errorf("auth not received yet *****") // what a giant hack
 					}
 					return preAuthSigner(ctx, c, logthis, authEvent)