we're sending Envelope and transmitting Arc<Envelope>, since we're wrapping the Envelope in an Arc to transmit it, we (probably) don't need to wrap the Event in an Arc too

src/event/mod.rs

@@ -14,7 +14,7 @@ pub enum Event {
 
 pub struct Envelope {
     pub from: Option<String>,
-    pub event: Arc<Event>,
+    pub event: Event,
     pub to: Vec<String>
 }
 
@@ -22,7 +22,7 @@ impl Envelope {
     pub fn new (event: Event) -> Envelope {
         Envelope {
             from: None,
-            event: Arc::new(event),
+            event: event,
             to: vec![]
         }
     }