Added layer as mixnode attribute

src/main.rs

@@ -56,7 +56,7 @@ fn run(matches: &ArgMatches) {
     // make sure our socket_address is equal to our predefined-hardcoded value
     assert_eq!("127.0.0.1:8080", socket_address.to_string());
 
-    let mix = MixNode::new(socket_address, secret_key);
+    let mix = MixNode::new(socket_address, secret_key, layer);
     mix.start_listening().unwrap();
 }
 

src/node/mod.rs

@@ -93,14 +93,16 @@ impl PacketProcessor {
 // the MixNode will live for whole duration of this program
 pub struct MixNode {
     network_address: SocketAddr,
-    secret_key: Scalar
+    secret_key: Scalar,
+    layer: usize
 }
 
 impl MixNode{
-    pub fn new(network_address: SocketAddr, secret_key: Scalar) -> Self {
+    pub fn new(network_address: SocketAddr, secret_key: Scalar, layer: usize) -> Self {
         MixNode {
             network_address,
-            secret_key
+            secret_key,
+            layer
         }
     }