From c0313e83111de2719f3b6eaaca2b3bf2b75a7d3f Mon Sep 17 00:00:00 2001
From: Kieran Prasch <kieran@nucypher.com>
Date: Mon, 21 Sep 2020 15:31:41 -0700
Subject: [PATCH] Handle invalid node cert during node validation

---
 nucypher/network/nodes.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/nucypher/network/nodes.py b/nucypher/network/nodes.py
index 3ff63155e..530aa615f 100644
--- a/nucypher/network/nodes.py
+++ b/nucypher/network/nodes.py
@@ -397,7 +397,10 @@ class Learner:
             stranger_certificate = node.certificate
 
             # Store node's certificate - It has been seen.
-            certificate_filepath = self.node_storage.store_node_certificate(certificate=stranger_certificate)
+            try:
+                certificate_filepath = self.node_storage.store_node_certificate(certificate=stranger_certificate)
+            except InvalidNodeCertificate:
+                return False  # that was easy
 
             # In some cases (seed nodes or other temp stored certs),
             # this will update the filepath from the temp location to this one.