I am facing a problem with authorize.net payment gateway method since we are aware that authorize.net has removed md5 and provided a signature Key field. Hence I have implemented the authorize.net patch also. When I have tested with a sandbox account its working fine but with Live credential account, it throws following exception.
[2019-04-10 20:32:48] main.CRITICAL: The transaction was declined because the response hash validation failed. {"exception":"[object] (Magento\\Framework\\Exception\\LocalizedException(code: 0): The transaction was declined because the response hash validation failed. at /vendor/magento/module-authorizenet/Model/Directpost.php:539)"} []
Below is the screenshot of Authorize.Net configuration setting.
If any buddy has the same issue. Please help me.