feat(zksync_server): adding --only-verify-config flag

core/bin/zksync_server/src/main.rs

@@ -71,6 +71,11 @@ struct Cli {
     /// Now the node framework is used by default and this argument is left for backward compatibility.
     #[arg(long)]
     use_node_framework: bool,
+
+    /// Used for testing whether provided config is correct.
+    /// The node will not be started, only the config will be verified.
+    #[arg(long, conflicts_with = "genesis")]
+    only_verify_config: bool,
 }
 
 #[derive(Debug, Clone)]
@@ -165,6 +170,12 @@ fn main() -> anyhow::Result<()> {
         secrets,
     )?;
 
+    if opt.only_verify_config {
+        node.build(opt.components.0)?;
+        tracing::info!("Config verification is successful!");
+        return Ok(());
+    }
+
     let observability_guard = {
         // Observability initialization should be performed within tokio context.
         let _context_guard = node.runtime_handle().enter();