Implement setup, wipe, restore, and backup for Keepkey

Setup, wipe, and restore are supported, so implement those.

Backing up is not supported, so just raise an error for that

hwilib/devices/keepkey.py

@@ -1,6 +1,6 @@
 # KeepKey interaction script
 
-from ..hwwclient import HardwareWalletClient
+from ..hwwclient import HardwareWalletClient, UnavailableActionError
 from keepkeylib.transport_hid import HidTransport
 from keepkeylib.client import KeepKeyClient as KeepKey
 from keepkeylib import tools
@@ -11,6 +11,7 @@ from ..serializations import ser_uint256, uint256_from_str
 
 import binascii
 import json
+import os
 
 KEEPKEY_VENDOR_ID = 0x2B24
 KEEPKEY_DEVICE_ID = 0x0001
@@ -60,6 +61,9 @@ class KeepkeyClient(HardwareWalletClient):
         if not self.client:
             raise IOError("no Device")
 
+        self.password = password
+        os.environ['PASSPHRASE'] = password
+
     # Must return a dict with the xpub
     # Retrieves the public key at the specified BIP 32 derivation path
     def get_pubkey_at_path(self, path):
@@ -181,19 +185,24 @@ class KeepkeyClient(HardwareWalletClient):
 
     # Setup a new device
     def setup_device(self, label='', passphrase=''):
-        raise NotImplementedError('The KeepKey does not currently implement setup')
+        if self.client.features.initialized:
+            raise DeviceAlreadyInitError('Device is already initialized. Use wipe first and try again')
+        self.client.reset_device(False, 256, bool(self.password), True, label, 'english')
+        return {'success': True}
 
     # Wipe this device
     def wipe_device(self):
-        raise NotImplementedError('The KeepKey does not currently implement wipe')
+        self.client.wipe_device()
+        return {'success': True}
 
     # Restore device from mnemonic or xprv
     def restore_device(self, label=''):
-        raise NotImplementedError('The Keepkey does not implement device restoring')
+        self.client.recovery_device(False, 24, bool(self.password), True, label, 'english')
+        return {'success': True}
 
     # Begin backup process
     def backup_device(self, label='', passphrase=''):
-        raise NotImplementedError('The Keepkey does not implement this method')
+        raise UnavailableActionError('The Keepkey does not support creating a backup via software')
 
     # Close the device
     def close(self):