daemon: implements post office

kordophone/src/api/mod.rs

@@ -15,10 +15,11 @@ pub mod event_socket;
 pub use event_socket::EventSocket;
 
 use self::http_client::Credentials;
+use std::fmt::Debug;
 
 #[async_trait]
 pub trait APIInterface {
-    type Error;
+    type Error: Debug;
 
     // (GET) /version
     async fn get_version(&mut self) -> Result<String, Self::Error>;
@@ -38,7 +39,7 @@ pub trait APIInterface {
     // (POST) /sendMessage
     async fn send_message(
         &mut self, 
-        outgoing_message: OutgoingMessage,
+        outgoing_message: &OutgoingMessage,
     ) -> Result<Message, Self::Error>;
 
     // (POST) /authenticate