ruby on rails 3 - How to use BN Code with Paypal Express Recurring gem -

i have integrated express checkout recurring payment paypal using https://github.com/fnando/paypal-recurring gem in rails3 project. got request add bn code provided paypal referral program.

i checked gem again not found parameter pass bn code. can have idea how pass bn code given gem? there 'reference' parameter not bn per checked in detail.

i referred https://www.paypal-marketing.com/emarketing/partner/na/portal/integrate_bn_codes.html#ec not helped much.

please give inputs if has idea given gem.

thanks,

give shot, i'm guessing go in application config

activemerchant::billing::paypalgateway.application_id = "your bn here" activemerchant::billing::paypalexpressgateway.application_id = "your bn here also" 

see more here: https://github.com/activemerchant/active_merchant/issues/888#issuecomment-130787898