STANDARD_ERROR_CODE_MAPPING = {
        # Bank error codes: https://support.payeezy.com/hc/en-us/articles/203730509-First-Data-Global-Gateway-e4-Bank-Response-Codes
        '201' => STANDARD_ERROR_CODE[:incorrect_number],
        '531' => STANDARD_ERROR_CODE[:invalid_cvc],
        '503' => STANDARD_ERROR_CODE[:invalid_cvc],