From 6cadb198644cf5e942187896c2e6bb3ecc9edc6e Mon Sep 17 00:00:00 2001
From: apoorvsadana <95699312+apoorvsadana@users.noreply.github.com>
Date: Thu, 21 Dec 2023 11:25:14 +0530
Subject: [PATCH] fix: skip serialization of continuation token if `None`
 (#530)

---
 starknet-core/src/types/mod.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/starknet-core/src/types/mod.rs b/starknet-core/src/types/mod.rs
index 3cef6596..0eac373d 100644
--- a/starknet-core/src/types/mod.rs
+++ b/starknet-core/src/types/mod.rs
@@ -106,7 +106,9 @@ pub struct EventsPage {
     /// Matching events
     pub events: Vec<EmittedEvent>,
     /// A pointer to the last element of the delivered page, use this token in a subsequent query to
-    /// obtain the next page
+    /// obtain the next page. If the value is `None`, don't add it to the response as clients might
+    /// use `contains_key` as a check for the last page.
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub continuation_token: Option<String>,
 }