Import resilience (#463)

README.md

@@ -9,6 +9,7 @@
   - [How to run](#how-to-run)
     - [Using the Specter Desktop app](#using-the-specter-desktop-app)
     - [Installing Specter from Pip](#installing-specter-from-pip)
+    - [Connect Specter to Bitcoin Core](#connect-specter-to-bitcoin-core)
   - [Detailed instructions](#detailed-instructions)
   - [Errors, doubts.. Read our FAQ!](#errors-doubts-read-our-faq)
   - [A few screenshots](#a-few-screenshots)

src/cryptoadvance/specter/controller.py

@@ -351,8 +351,12 @@ def general_settings():
                 as_attachment=True
             )
         elif action == "restore":
-            restore_devices = json.loads(request.form.get("restoredevices", "[]"))
-            restore_wallets = json.loads(request.form.get("restorewallets", "[]"))
+            restore_devices = []
+            restore_wallets = []
+            if request.form.get("restoredevices", ""):
+                restore_devices = json.loads(request.form.get("restoredevices", "[]"))
+            if request.form.get("restorewallets", ""):
+                restore_wallets = json.loads(request.form.get("restorewallets", "[]"))
             for device in restore_devices:
                 with fslock:
                     with open(