From 7016280d1c0c83f69893ff40946158a17b77059f Mon Sep 17 00:00:00 2001
From: Aditya Kulkarni <adityapk@gmail.com>
Date: Wed, 9 Oct 2019 15:04:53 -0700
Subject: [PATCH] Warn if server is behind

---
 src/lightclient.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/lightclient.rs b/src/lightclient.rs
index ea5fa71..d9d7295 100644
--- a/src/lightclient.rs
+++ b/src/lightclient.rs
@@ -569,6 +569,12 @@ impl LightClient {
             });
         let latest_block = latest_block_height.load(Ordering::SeqCst);
 
+        if latest_block < last_scanned_height {
+            let w = format!("Server's latest block({}) is behind ours({})", latest_block, last_scanned_height);
+            warn!("{}", w);
+            return w;
+        }
+
         info!("Latest block is {}", latest_block);
 
         // Get the end height to scan to.