From cc818d9099bc747247250b614f1d61f83b236f3f Mon Sep 17 00:00:00 2001
From: Hocuri <hocuri@gmx.de>
Date: Tue, 21 Apr 2026 14:51:30 +0200
Subject: [PATCH] Document that Param::Arg4 is also used for resent messages

---
 src/param.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/param.rs b/src/param.rs
index dfd48d31f..087bba93e 100644
--- a/src/param.rs
+++ b/src/param.rs
@@ -136,6 +136,10 @@ pub enum Param {
     /// For "MemberAddedToGroup" and "MemberRemovedFromGroup",
     /// this is the fingerprint added to / removed from the group.
     ///
+    /// For messages resent when adding a new member to a broadcast channel,
+    /// this is the fingerprint of the added member;
+    /// the message must only be sent to this one member then.
+    ///
     /// For call messages, this is the end timsetamp.
     Arg4 = b'H',