fix backwards compatibility in wallet import/export

lbry/extras/daemon/daemon.py

@@ -1346,9 +1346,9 @@ class Daemon(metaclass=JSONRPCServerType):
 
         """
         wallet = self.wallet_manager.get_wallet_or_default(wallet_id)
-        if password:
-            return wallet.pack(password).decode()
+        if password is None:
             return wallet.to_json()
+        return wallet.pack(password).decode()
 
     @requires("wallet")
     async def jsonrpc_wallet_import(self, data, password=None, wallet_id=None, blocking=False):

lbry/wallet/wallet.py

@@ -189,10 +189,10 @@ class Wallet:
               password: str, data: str) -> (List['Account'], List['Account']):
         assert not self.is_locked, "Cannot sync apply on a locked wallet."
         added_accounts, merged_accounts = [], []
-        if password:
-            decrypted_data = self.unpack(password, data)
-        else:
+        if password is None:
             decrypted_data = json.loads(data)
+        else:
+            decrypted_data = self.unpack(password, data)
         self.preferences.merge(decrypted_data.get('preferences', {}))
         for account_dict in decrypted_data['accounts']:
             ledger = manager.get_or_create_ledger(account_dict['ledger'])

tests/integration/blockchain/test_wallet_commands.py

@@ -501,3 +501,11 @@ class WalletEncryptionAndSynchronization(CommandTestCase):
         json_data["preferences"]["four"] = {"value": 4, "ts": 0}
         await daemon.jsonrpc_wallet_import(data=json.dumps(json_data), blocking=True)
         self.assertEqual(daemon.jsonrpc_preference_get("four"), {"four": 4})
+
+        # if password is empty string, export is encrypted
+        data = await daemon2.jsonrpc_wallet_export(password="")
+        self.assertNotEqual(data[0], "{")
+
+        # if password is empty string, import is decrypted
+        await daemon.jsonrpc_wallet_import(data, password="")
+