Major refactoring

- separation between Wallet and key management (Keystore)
 - simplification of wallet classes
 - remove support for multiple accounts in the same wallet
 - add support for OP_RETURN to Trezor plugin
 - split multi-accounts wallets for backward compatibility

plugins/hw_wallet/plugin.py

@@ -37,8 +37,8 @@ class HW_PluginBase(BasePlugin):
 
     def __init__(self, parent, config, name):
         BasePlugin.__init__(self, parent, config, name)
-        self.device = self.wallet_class.device
-        self.wallet_class.plugin = self
+        self.device = self.keystore_class.device
+        self.keystore_class.plugin = self
 
     def is_enabled(self):
         return self.libraries_available
@@ -48,33 +48,6 @@ class HW_PluginBase(BasePlugin):
 
     @hook
     def close_wallet(self, wallet):
-        if isinstance(wallet, self.wallet_class):
+        if isinstance(wallet.get_keystore(), self.keystore_class):
             self.device_manager().unpair_wallet(wallet)
 
-    def on_restore_wallet(self, wallet, wizard):
-        assert isinstance(wallet, self.wallet_class)
-        msg = _("Enter the seed for your %s wallet:" % self.device)
-        f = lambda x: wizard.run('on_restore_seed', x)
-        wizard.enter_seed_dialog(run_next=f, title=_('Restore hardware wallet'), message=msg, is_valid=self.is_valid_seed)
-
-    def on_restore_seed(self, wallet, wizard, seed):
-        f = lambda x: wizard.run('on_restore_passphrase', seed, x)
-        wizard.request_passphrase(self.device, run_next=f)
-
-    def on_restore_passphrase(self, wallet, wizard, seed, passphrase):
-        f = lambda x: wizard.run('on_restore_password', seed, passphrase, x)
-        wizard.request_password(run_next=f)
-
-    def on_restore_password(self, wallet, wizard, seed, passphrase, password):
-        # Restored wallets are not hardware wallets
-        wallet_class = self.wallet_class.restore_wallet_class
-        wallet.storage.put('wallet_type', wallet_class.wallet_type)
-        wallet = wallet_class(wallet.storage)
-        wallet.add_seed(seed, password)
-        wallet.add_xprv_from_seed(seed, 'x/', password, passphrase)
-        wallet.create_hd_account(password)
-        wizard.create_addresses()
-
-    @staticmethod
-    def is_valid_seed(seed):
-        return True