From 74c784c62dbfc7406b2e73ac6981b65ef614c75a Mon Sep 17 00:00:00 2001
From: Maciej Hirsz <1096222+maciejhirsz@users.noreply.github.com>
Date: Mon, 13 May 2019 13:18:24 +0200
Subject: [PATCH] fix: Crash when accessing network state for nodes that don't
 have it. (#144)

* fix: Crash when accessing network state for nodes that don't have it.
---
 packages/backend/src/index.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/packages/backend/src/index.ts b/packages/backend/src/index.ts
index ea61a4b..4d14245 100644
--- a/packages/backend/src/index.ts
+++ b/packages/backend/src/index.ts
@@ -62,9 +62,12 @@ http.createServer((request, response) => {
       const nodeList = Array.from(chain.nodeList());
       const nodeId = Number(strNodeId);
       const node = nodeList.filter((node) => node.id == nodeId)[0];
-      if (node) {
+      if (node && typeof node.networkState === 'string') {
         response.writeHead(200, {"Content-Type": "application/json"});
         response.write(node.networkState);
+      } else {
+        response.writeHead(404, {"Content-Type": "text/plain"});
+        response.write("Node has disconnected or has not submitted its network state yet");
       }
     }
   }