Add getter for node secret in ChannelManager

Author: valentinewallace

lightning/src/ln/channelmanager.rs

@@ -2504,6 +2504,11 @@ impl<Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref> ChannelMana
 		self.our_network_pubkey.clone()
 	}
 
+	/// Gets the node secret held by this ChannelManager
+	pub fn get_our_node_secret(&self) -> &SecretKey {
+		&self.our_network_key
+	}
+
 	/// Restores a single, given channel to normal operation after a
 	/// ChannelMonitorUpdateErr::TemporaryFailure was returned from a channel monitor update
 	/// operation.