From d85f7ac6bbcccbc83012d85fdf25635e57c5f15b Mon Sep 17 00:00:00 2001
From: Pavol Rusnak <stick@gk2.sk>
Date: Tue, 27 Feb 2018 15:37:08 +0100
Subject: [PATCH] PassphraseAck.passphrase is now optional

---
 protob/messages.proto | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/protob/messages.proto b/protob/messages.proto
index efa88cca1..174e2d444 100644
--- a/protob/messages.proto
+++ b/protob/messages.proto
@@ -275,7 +275,7 @@ message PassphraseRequest {
  * @prev PassphraseRequest
  */
 message PassphraseAck {
-	required string passphrase = 1;
+	optional string passphrase = 1;
 	optional bytes state = 2;		// assumed device state, throw error if set and different
 }