feat: add countdown log till genesis

bin/ream/src/main.rs

@@ -90,6 +90,7 @@ use ream_validator_lean::{
     registry::load_validator_registry, service::ValidatorService as LeanValidatorService,
 };
 use ssz_types::VariableList;
+use tokio::time;
 use tokio::{
     sync::{broadcast, mpsc},
     time::Instant,
@@ -316,6 +317,10 @@ pub async fn run_lean_node(config: LeanNodeConfig, executor: ReamExecutor, ream_
         ream_rpc_lean::server::start(server_config, lean_chain_reader, network_state).await
     });
 
+    executor.spawn(async move {
+        countdown_for_genesis().await;
+    });
+
     tokio::select! {
         result = chain_future => {
             error!("Chain service has stopped unexpectedly: {result:?}");
@@ -703,6 +708,36 @@ pub async fn run_generate_private_key(config: GeneratePrivateKeyConfig) {
     process::exit(0);
 }
 
+// Countdown logs until the genesis timestamp reaches
+pub async fn countdown_for_genesis() {
+    loop {
+        let now = match SystemTime::now().duration_since(UNIX_EPOCH) {
+            Ok(now) => now.as_secs(),
+            // The chain is already past genesis, we don't need a countdown
+            Err(_) => break,
+        };
+
+        let remaining = lean_network_spec().genesis_time.saturating_sub(now);
+
+        if remaining == 0 {
+            info!("Genesis reached! Starting services...");
+            break;
+        }
+
+        // Format the remaining time for a cleaner log
+        let minutes = (remaining % 3600) / 60;
+        let seconds = remaining % 60;
+
+        info!(
+            "Waiting for genesis in {:02}:{:02} seconds",
+            minutes, seconds
+        );
+
+        // Sleep for 1 second before ticking again
+        time::sleep(Duration::from_secs(1)).await;
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use std::time::Duration;