Description For Exception

When an exception occurs during the period of requesting API, it would return the following parameters generally; If your system receives this type of repoinse message, there is not need to veiry the signature; Below is the detail for each parameter's description.

Key	Key value
merchantId	the value of the merchantId
code	the value of the error code
status	ERROR
error	Error description
cause	The error's cause

{ "cause": "{\"requestId\":{\"message\":\"requestId.invalid\"}}", "code": "E1004016", "error": "方法参数无效", "merchantId": "G90009007", "status": "ERROR" }