Paypal Adaptive Payments Library for ActiveMerchant

Supports payments, preapprovals, refunds and currency conversions

Requirements:

  .Rails 3.0
  .Json
  .Builder
  .ActiveMerchant 1.9.x

to install

    git clone https://github.com/varsh/paypal_adaptive_gateway.git or download from https://github.com/varsh/paypal_adaptive_gateway
    cd <path to root of downloaded patch>
    rails <Path to active merchant library> ex: "C:\Ruby187\lib\ruby\gems\1.8\gems\activemerchant-1.9.1"
  
to use

  in application_controller.rb
  
    def gateway
      @gateway ||= PaypalAdaptivePaymentGateway.new(
       :login => 'your_email',
       :password => 'your_password',
       :signature => ' your_signature',
       :appid => 'your_app_id'
      )
    end
  
  In the payment process:
  
    #for chained payments
    def checkout
      recipients = [{:email => 'receiver_email',
                     :amount => some_amount,
                     :primary => true},
                    {:email => 'receiver_email',
                     :amount => recipient_amount,
                     :primary => false}
                     ]
      response = gateway.pay(
        :return_url => url_for(:action => 'action', :only_path => false),
        :cancel_url => url_for(:action => 'action', :only_path => false),
        :notify_url => url_for(:action => 'notify_action', :only_path => false),
        :receiver_list => recipients
      )
      redirect_to response.redirect_url_for
    end
    
    set the :primary flag to false for each recipient for a split payment

In the Refund  process:
    recipients = [{:email => params[:receiveremail_0],
                     :amount => params[:amount_0]}
                     ]

      response = gateway.refund(
        :return_url => "returnURL",
        :cancel_url => "cancelURL",
	  :pay_key=>params[:paykey],
        :receiver_list => recipients
      )
    
In the preapproval process:
response = gateway.preapprove_payment(
    :return_url => "returnURL",
    :cancel_url => "cancelURL",
    :senderEmail =>"email address of sender",
    :start_date =>"starting date",
    :end_date =>"ending date",
    :currency_code =>"currency code",
    :max_amount =>"maxTotalAmountOfAllPayments",
    :maxNumberOfPayments =>"maxNumberOfPayments"
      )

In the cancel preapproval process:
	response = gateway.cancel_preapproval(
	:preapproval_key =>"preapprovalkey"
      )
  to debug
  
    use either gateway.debug or response.debug this gives you the json response, the xml sent and the url it was posted to.