From 6a00cf9942ab77943b05e880e1fea43ccf5488c4 Mon Sep 17 00:00:00 2001
From: Lex Berezhny <lex@damoti.com>
Date: Sun, 13 Jan 2019 22:44:46 -0500
Subject: [PATCH] mypy fixes

---
 torba/orchstr8/node.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/torba/orchstr8/node.py b/torba/orchstr8/node.py
index abe2009d9..b53aa7486 100644
--- a/torba/orchstr8/node.py
+++ b/torba/orchstr8/node.py
@@ -164,12 +164,14 @@ class WalletNode:
         })
         self.ledger = self.manager.ledgers[self.ledger_class]
         self.wallet = self.manager.default_wallet
-        if seed is None:
+        if seed is None and self.wallet is not None:
             self.wallet.generate_account(self.ledger)
-        else:
+        elif self.wallet is not None:
             self.ledger.account_class.from_dict(
                 self.ledger, self.wallet, {'seed': seed}
             )
+        else:
+            raise ValueError('Wallet is required.')
         self.account = self.wallet.default_account
         await self.manager.start()