Made a full refactoring of synchronization primitives between settings, keystore, blockchain and miner.

src/context.rs

@@ -0,0 +1,50 @@
+use crate::{Keystore, Blockchain};
+use std::collections::HashMap;
+
+pub struct Context {
+    pub(crate) settings: Settings,
+    pub(crate) keystore: Keystore,
+    pub(crate) blockchain: Blockchain,
+}
+
+impl Context {
+    /// Creating an essential context to work with
+    pub fn new(settings: Settings, keystore: Keystore, blockchain: Blockchain) -> Context {
+        Context { settings, keystore, blockchain }
+    }
+
+    /// Load keystore and return Context
+    pub fn load_keystore<S: Into<String>>(mut self, name: S, password: S) -> Context {
+        let filename = &name.into();
+        match Keystore::from_file(filename, &password.into()) {
+            None => {
+                println!("Error loading keystore '{}'!", filename);
+            },
+            Some(keystore) => {
+                self.keystore = keystore;
+            },
+        }
+        self
+    }
+
+    pub fn get_keystore(&self) -> Keystore {
+        self.keystore.clone()
+    }
+
+    pub fn set_keystore(&mut self, keystore: Keystore) {
+        self.keystore = keystore;
+    }
+}
+
+pub struct Settings {
+    pub chain_id: u32,
+    pub version: u32,
+    salts: HashMap<String, String>
+}
+
+impl Settings {
+    /// TODO parse settings
+    pub fn new<S: Into<String>>(chain_id: u32, version: u32, settings: S) -> Settings {
+        Settings { chain_id, version, salts: HashMap::new() }
+    }
+}