# File lib/active_merchant/billing/gateways/paypal/paypal_common_api.rb, line 63 def initialize(options = {}) requires!(options, :login, :password) @options = { :pem => pem_file, :signature => signature }.update(options) if @options[:pem].blank? && @options[:signature].blank? raise ArgumentError, "An API Certificate or API Signature is required to make requests to PayPal" end super end