members_controller active_merchant excerpt.rb

def create
  case @mtype
  when 'Gold'
    pmt = PN_MBR_GOLD
  when 'Regular'
    pmt = PN_MBR_REGULAR
  when 'Student'
    pmt = PN_MBR_STUDENT
  end
  
  setup_response = gateway.setup_purchase(pmt,
    :ip                => request.remote_ip,
    :return_url        => url_for(:action => 'confirm', :only_path => false),
    :cancel_return_url => url_for(:action => 'new', :only_path => false)
  )
  redirect_to gateway.redirect_url_for(setup_response.token)
end

def confirm
  redirect_to :action => 'new' unless params[:token]
  
  details_response = gateway.details_for(params[:token])
  
  unless details_response.success?
    @message = details_response.message
    render 'new'
    return
  end
    
  @address = details_response.address
end

def complete(pmt)
  purchase = gateway.purchase(pmt,
    :ip       => request.remote_ip,
    :payer_id => params[:payer_id],
    :token    => params[:token]
  )
  
  unless purchase.success?
    @message = purchase.message
    render :action => 'error'
    return
  end

	# restful_auth stuff...
end

private
  def gateway
    @gateway ||= PaypalExpressGateway.new(
      :login => Test_Account,
      :password => Test_API_Password,
      :signature => 'some_sig_string'
    )
  end
end