From 8765657975d6da64ccef6f7331311e8cc8804d0f Mon Sep 17 00:00:00 2001
From: sc0Vu <alk03073135@gmail.com>
Date: Wed, 3 Jan 2018 15:18:45 +0800
Subject: [PATCH] CallValidator.

---
 src/Validators/CallValidator.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Validators/CallValidator.php b/src/Validators/CallValidator.php
index f7a83e4..aed5f6c 100644
--- a/src/Validators/CallValidator.php
+++ b/src/Validators/CallValidator.php
@@ -29,7 +29,7 @@ class CallValidator
         if (!is_array($value)) {
             return false;
         }
-        if (isset($value['from']) && AddressValidator::validate($value['from']) === false) {
+        if (isset($value['from']) && AddressValidator::validate($value['from']) === false && $value['from'] !== '') {
             return false;
         }
         if (!isset($value['to'])) {