Remove decrypt_message; no longer supported by Trezor or KeepKey

plugins/trezor/clientbase.py

@@ -230,7 +230,7 @@ class TrezorClientBase(GuiMixin, PrintError):
 
     @staticmethod
     def wrap_methods(cls):
-        for method in ['apply_settings', 'change_pin', 'decrypt_message',
+        for method in ['apply_settings', 'change_pin',
                        'get_address', 'get_public_node',
                        'load_device_by_mnemonic', 'load_device_by_xprv',
                        'recovery_device', 'reset_device', 'sign_message',

plugins/trezor/plugin.py

@@ -33,14 +33,7 @@ class TrezorCompatibleKeyStore(Hardware_KeyStore):
         return self.plugin.get_client(self, force_pair)
 
     def decrypt_message(self, sequence, message, password):
-        raise RuntimeError(_('Electrum and %s encryption and decryption are currently incompatible') % self.device)
-        client = self.get_client()
-        address_path = self.get_derivation() + "/%d/%d"%sequence
-        address_n = client.expand_path(address_path)
-        payload = base64.b64decode(message)
-        nonce, message, msg_hmac = payload[:33], payload[33:-8], payload[-8:]
-        result = client.decrypt_message(address_n, nonce, message, msg_hmac)
-        return result.message
+        raise RuntimeError(_('Encryption and decryption are not implemented by %s') % self.device)
 
     def sign_message(self, sequence, message, password):
         client = self.get_client()