Just set the node's cert filepath as soon as we know it - that way we don't need to constantly pass it into middleware.

nucypher/crypto/powers.py

@@ -24,6 +24,7 @@ from umbral.keys import UmbralPublicKey, UmbralPrivateKey, UmbralKeyingMaterial
 
 from nucypher.keystore import keypairs
 from nucypher.keystore.keypairs import SigningKeypair, DecryptingKeypair
+from nucypher.utilities.decorators import validate_checksum_address
 
 
 class PowerUpError(TypeError):

nucypher/network/nodes.py

@@ -383,6 +383,7 @@ class Learner:
             raise RuntimeError
 
         if self.save_metadata:
+            node.certificate_filepath = certificate_filepath
             self.node_storage.store_node_metadata(node=node)
 
         self.log.info("Remembering {}, popping {} listeners.".format(node.checksum_public_address, len(listeners)))