Optimized initial blocks sync.

src/commons/constants.rs

@@ -40,6 +40,8 @@ pub const UI_REFRESH_DELAY_MS: u128 = 500;
 pub const LOG_REFRESH_DELAY_SEC: u64 = 60;
 
 pub const POLL_TIMEOUT: Option<Duration> = Some(Duration::from_millis(250));
+/// We start syncing blocks only when we got 8 and more connected nodes
+pub const MIN_CONNECTED_NODES_START_SYNC: usize = 8;
 pub const MAX_RECONNECTS: u32 = 5;
 pub const MAX_IDLE_SECONDS: u64 = 180;
 pub const MAX_NODES: usize = 15;