From baf5ab4b4bef057d793dc6d67170d2078761793f Mon Sep 17 00:00:00 2001
From: Panayiotis Savva <psavva@gmail.com>
Date: Mon, 18 Mar 2024 17:13:53 +0200
Subject: [PATCH] Update InitialBlockDownloadState.cs

---
 src/Blockcore/Base/InitialBlockDownloadState.cs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/Blockcore/Base/InitialBlockDownloadState.cs b/src/Blockcore/Base/InitialBlockDownloadState.cs
index 7a54f6aaa..6f7c0a6e2 100644
--- a/src/Blockcore/Base/InitialBlockDownloadState.cs
+++ b/src/Blockcore/Base/InitialBlockDownloadState.cs
@@ -55,6 +55,13 @@ public InitialBlockDownloadState(IChainState chainState, Network network, Consen
         /// <inheritdoc />
         public bool IsInitialBlockDownload()
         {
+            // The HTTP server starts up before the blockchain database is loaded, this means ConsensusTip can at startup be null. Simply
+            // return IBD as true if ConsensusTip is null.
+            if (this.chainState.ConsensusTip == null)
+            {
+                return true;
+            }
+            
             if (this.lastCheckpointHeight > this.chainState.ConsensusTip.Height)
                 return true;
 
@@ -67,4 +74,4 @@ public bool IsInitialBlockDownload()
             return false;
         }
     }
-}
\ No newline at end of file
+}