From 60166dc815d94127162f50824087640fd3765160 Mon Sep 17 00:00:00 2001
From: zaphod534 <alessandro.celestino@gmail.com>
Date: Thu, 4 Nov 2021 15:34:51 +0100
Subject: [PATCH] fix: set notification type as one of defined notifications
 (#211)

---
 lib/pigeon.ex | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/pigeon.ex b/lib/pigeon.ex
index a02921ea..cf1ff2a4 100644
--- a/lib/pigeon.ex
+++ b/lib/pigeon.ex
@@ -53,7 +53,11 @@ defmodule Pigeon do
           | {module, atom}
           | {module, atom, [any]}
 
-  @type notification :: %{__meta__: Pigeon.Metadata.t()}
+  @type notification :: %{
+          :__struct__ => atom(),
+          :__meta__ => Pigeon.Metadata.t(),
+          optional(atom()) => any()
+        }
 
   @typedoc ~S"""
   Options for sending push notifications.