fix command line interface for hardware wallets. fixes #3056

plugins/hw_wallet/__init__.py

@@ -1 +1,2 @@
 from .plugin import HW_PluginBase
+from .cmdline import CmdLineHandler

plugins/hw_wallet/cmdline.py

@@ -0,0 +1,39 @@
+from electrum.util import print_msg, print_error, raw_input
+
+class CmdLineHandler:
+
+    def get_passphrase(self, msg, confirm):
+        import getpass
+        print_msg(msg)
+        return getpass.getpass('')
+
+    def get_pin(self, msg):
+        t = { 'a':'7', 'b':'8', 'c':'9', 'd':'4', 'e':'5', 'f':'6', 'g':'1', 'h':'2', 'i':'3'}
+        print_msg(msg)
+        print_msg("a b c\nd e f\ng h i\n-----")
+        o = raw_input()
+        return ''.join(map(lambda x: t[x], o))
+
+    def prompt_auth(self, msg):
+        import getpass
+        print_msg(msg)
+        response = getpass.getpass('')
+        if len(response) == 0:
+            return None
+        return response
+
+    def yes_no_question(self, msg):
+        print_msg(msg)
+        return raw_input() in 'yY'
+
+    def stop(self):
+        pass
+
+    def show_message(self, msg, on_cancel):
+        print_msg(msg)
+
+    def update_status(self, b):
+        print_error('trezor status', b)
+
+    def finished(self):
+        pass