Merge 788a08f710 into bd40f1946a

composer.json

@@ -10,7 +10,7 @@
         }
     ],
     "require": {
-        "guzzlehttp/guzzle": "^6.3|^7.0",
+        "guzzlehttp/guzzle": "^7.0",
         "PHP": "^7.1",
         "kornrunner/keccak": "~1.0",
         "phpseclib/phpseclib": "~2.0.11",

src/Contract.php

@@ -587,6 +587,8 @@ class Contract
             $method = array_splice($arguments, 0, 1)[0];
             $callback = array_pop($arguments);
 
+            $arguments = is_array($arguments[0]) ? $arguments[0] : $arguments;
+            
             if (!is_string($method)) {
                 throw new InvalidArgumentException('Please make sure the method is string.');
             }