From dafb80ad7a76d2157c08d2348a0c236dcd39d7fb Mon Sep 17 00:00:00 2001
From: Roman Zeyde <roman.zeyde@gmail.com>
Date: Tue, 13 Mar 2018 16:50:46 +0200
Subject: [PATCH] trezor: don't retry on PIN/passphrase entry cancellation

---
 libagent/device/ui.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libagent/device/ui.py b/libagent/device/ui.py
index d73d91d..b3c502c 100644
--- a/libagent/device/ui.py
+++ b/libagent/device/ui.py
@@ -75,6 +75,10 @@ def write(p, line):
     p.stdin.flush()
 
 
+class UnexpectedError(Exception):
+    """Unexpected response."""
+
+
 def expect(p, prefixes):
     """Read a line and return it without required prefix."""
     resp = p.stdout.readline()
@@ -82,7 +86,7 @@ def expect(p, prefixes):
     for prefix in prefixes:
         if resp.startswith(prefix):
             return resp[len(prefix):]
-    raise ValueError('Unexpected response: {}'.format(resp))
+    raise UnexpectedError(resp)
 
 
 def interact(title, description, prompt, binary, options):