feat(octez): implement serialize for endpoint

crates/octez/src/async/endpoint.rs

@@ -1,7 +1,6 @@
-#![allow(dead_code)]
-use std::fmt::{self, Display};
-
 use http::{uri::Scheme, Uri};
+use serde::Serialize;
+use std::fmt::{self, Display};
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct Endpoint {
@@ -32,6 +31,15 @@ impl Endpoint {
     }
 }
 
+impl Serialize for Endpoint {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(&self.to_string())
+    }
+}
+
 impl Default for Endpoint {
     fn default() -> Self {
         Self::localhost(80)
@@ -121,4 +129,13 @@ mod tests {
         let endpoint = Endpoint::localhost(8765);
         assert!(endpoint.to_string().contains("http://localhost:8765"));
     }
+
+    #[test]
+    fn serialize() {
+        let endpoint = Endpoint::localhost(8765);
+        assert_eq!(
+            serde_json::to_string(&endpoint).unwrap(),
+            "\"http://localhost:8765\""
+        )
+    }
 }