Make serialized POD ids available (#350)

src/frontend/serialization.rs

@@ -27,6 +27,12 @@ pub struct SerializedSignedPod {
     data: serde_json::Value,
 }
 
+impl SerializedSignedPod {
+    pub fn id(&self) -> PodId {
+        self.id
+    }
+}
+
 #[derive(Serialize, Deserialize, JsonSchema, Debug, Clone, PartialEq)]
 #[serde(rename_all = "camelCase")]
 #[schemars(rename = "MainPod")]
@@ -39,6 +45,12 @@ pub struct SerializedMainPod {
     data: serde_json::Value,
 }
 
+impl SerializedMainPod {
+    pub fn id(&self) -> PodId {
+        self.id
+    }
+}
+
 impl From<SignedPod> for SerializedSignedPod {
     fn from(pod: SignedPod) -> Self {
         let (pod_type, pod_type_name_str) = pod.pod.pod_type();