    # File lib/active_merchant/billing/gateways/payflow/payflow_common_api.rb, line 4
          def self.included(base)
            base.default_currency = 'USD'

            base.class_inheritable_accessor :partner

            # Set the default partner to PayPal
            base.partner = 'PayPal'

            base.supported_countries = ['US', 'CA', 'SG', 'AU']

            base.class_inheritable_accessor :timeout
            base.timeout = 60

            # Enable safe retry of failed connections
            # Payflow is safe to retry because retried transactions use the same
            # X-VPS-Request-ID header. If a transaction is detected as a duplicate
            # only the original transaction data will be used by Payflow, and the
            # subsequent Responses will have a :duplicate parameter set in the params
            # hash.
            base.retry_safe = true
          end