Returns the list of error codes. The following is the list of error codes mapped to their meanings which
would be provided back to the caller app. All these codes are mapped to
WPValidationErrorCodes
• 101 - Credit card number is empty.
• 102 - Invalid credit card number, numbers only and should be between 12 and 20 digits.
• 103 - Invalid credit card number, input doesn't verify Luhn check.
• 201 - Invalid security code, numbers only and should be between 3 and 4 digits.
• 301 - Expiry month is empty.
• 302 - Invalid expiry month; only numbers expected and in XX form (e.g. 09).
• 303 - Invalid expiry month, should range from 01 to 12.
• 304 - Expiry year is mandatory.
• 305 - Invalid expiry year, only numbers expected.
• 306 - Expiry date is not in the future.
• 401 - Card holder's name is empty.
• 402 - Card holder's name exceeds thirty characters.