Feature/load keys on run (#220)

* Mixnode keys loaded in run command

* Client keys loaded in run command

* Removed unused imports

mixnode/src/node/mod.rs

@@ -12,14 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use crate::config::persistence::pathfinder::MixNodePathfinder;
 use crate::config::Config;
 use crate::node::packet_processing::PacketProcessor;
 use crypto::encryption;
 use directory_client::presence::Topology;
 use futures::channel::mpsc;
 use log::*;
-use pemstore::pemstore::PemStore;
 use std::net::SocketAddr;
 use tokio::runtime::Runtime;
 use topology::NymTopology;
@@ -38,20 +36,7 @@ pub struct MixNode {
 }
 
 impl MixNode {
-    fn load_sphinx_keys(config_file: &Config) -> encryption::KeyPair {
-        let sphinx_keypair = PemStore::new(MixNodePathfinder::new_from_config(&config_file))
-            .read_encryption()
-            .expect("Failed to read stored sphinx key files");
-        println!(
-            "Public key: {}\n",
-            sphinx_keypair.public_key().to_base58_string()
-        );
-        sphinx_keypair
-    }
-
-    pub fn new(config: Config) -> Self {
-        let sphinx_keypair = Self::load_sphinx_keys(&config);
-
+    pub fn new(config: Config, sphinx_keypair: encryption::KeyPair) -> Self {
         MixNode {
             runtime: Runtime::new().unwrap(),
             config,