module ActiveMerchant::Billing::CreditCardMethods

Convenience methods that can be included into a custom Credit Card object, such as an ActiveRecord based Credit Card object.

Constants

CARD_COMPANIES

Public Class Methods

included(base) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 20
def self.included(base)
  base.extend(ClassMethods)
end

Public Instance Methods

card_verification_value_length(brand) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 53
def card_verification_value_length(brand)
  brand == 'american_express' ? 4 : 3
end
valid_card_verification_value?(cvv, brand) click to toggle source

Credit card providers have 3 digit verification values This isn't standardised, these are called various names such as CVC, CVV, CID, CSC and more See: en.wikipedia.org/wiki/Card_security_code American Express is the exception with 4 digits

Below are links from the card providers with their requirements visa: usa.visa.com/personal/security/3-digit-security-code.jsp master: www.mastercard.com/ca/merchant/en/getstarted/Anatomy_MasterCard.html jcb: www.jcbcard.com/security/info.html diners_club: www.dinersclub.com/assets/DinersClub_card_ID_features.pdf discover: www.discover.com/credit-cards/help-center/glossary.html american_express: online.americanexpress.com/myca/fuidfyp/us/action?request_type=un_fuid&Face=en_US

# File lib/active_merchant/billing/credit_card_methods.rb, line 49
def valid_card_verification_value?(cvv, brand)
  cvv.to_s =~ /^\d{#{card_verification_value_length(brand)}}$/
end
valid_expiry_year?(year) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 28
def valid_expiry_year?(year)
  (Time.now.year..Time.now.year + 20).include?(year.to_i)
end
valid_issue_number?(number) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 57
def valid_issue_number?(number)
  (number.to_s =~ /^\d{1,2}$/)
end
valid_month?(month) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 24
def valid_month?(month)
  (1..12).include?(month.to_i)
end
valid_start_year?(year) click to toggle source
# File lib/active_merchant/billing/credit_card_methods.rb, line 32
def valid_start_year?(year)
  ((year.to_s =~ /^\d{4}$/) && (year.to_i > 1987))
end