Not receiving paypal notifications through active merchant - ruby-on-rails

Question

I was working on an app in which I need to work with ipn, but it seems it does not work well.
I am trying to get the notification in success action and have specified the correct url in paypal sandbox.
def success
topup = current_user.topups.last
logger.debug "topup -------->"
logger.debug topup.amount.to_i
# raise request
details = EXPRESS_GATEWAY.details_for(topup.express_token)
logger.debug "details ------->"
logger.debug details.payer_id
# raise params[:payer_id]
response = EXPRESS_GATEWAY.purchase(topup.price_in_cents,{
:ip => request.remote_ip,
:token => topup.express_token,
:payer_id => details.payer_id
})
logger.debug "Response starts here --------->"
logger.debug response
if response.success?
amount = topup.amount.to_i
current_user.credits = current_user.credits.to_i + amount
current_user.save!
flash[:success] = "Thank you for the top up"
# #account_history = current_user.account_histories.build
# #account_history.update_attribute(:type => "Top Up", :details => "", :amount => amount, :user_id => current_user.id)
redirect_to current_user
notify = Paypal::Notification.new request.raw_post
logger.info "Notifying --------->"
logger.info notify
logger.info notify.status
logger.info "Notifying 2 --------->"
logger.info notify.acknowledge
logger.debug notify.status
if notify.acknowledge
logger.debug "Notifying --------->"
logger.debug notify.mc_gross
logger.debug notify.txn_id
end
else
redirect_to root_url
end
end
notify.acknowledge does not return anything (it is blank)

Answer 1

After banging my head for quite some time I was able to solve the issue. Posting my solution just in case anyone is stuck in the similar situation :-
One important thing is that IPN sends post data to the IPN listener so make sure you have a route defined for this.
I also had a before_filter :authenticate_user! , because of which I was getting html code 401. Had to skip before filter for notify action.
def pay_with_account
topup = Topup.find(params[:id])
response = EXPRESS_GATEWAY.setup_purchase(topup.price_in_cents,{
:ip => request.remote_ip,
:currency_code => 'GBP',
:return_url => topups_success_url(topup),
:notify_url => topups_notify_url(topup),
:cancel_return_url => topups_cancel_url(topup),
# :allow_guest_checkout => true,
:items => [{:name => "Topup", :quantity => 1,:description => "Top up my account", :amount => topup.price_in_cents}]
})
topup.update_attribute :express_token, response.token
redirect_to EXPRESS_GATEWAY.redirect_url_for(response.token)
end
This is the return url :-
def success
topup = current_user.topups.last
details = EXPRESS_GATEWAY.details_for(topup.express_token)
response = EXPRESS_GATEWAY.purchase(topup.price_in_cents,{
:ip => request.remote_ip,
:currency_code => 'GBP',
:token => topup.express_token,
:payer_id => details.payer_id
})
if response.success?
amount = topup.amount.to_i
current_user.credits = current_user.credits.to_i + amount
current_user.save!
redirect_to user_payments_path(current_user)
flash[:success] = "Your transaction was successfully completed"
else
flash[:error] = "Your transaction could not be compelted"
redirect_to user_payments_path(current_user)
end
end
This is the notify url :-
def notify
notify = Paypal::Notification.new(request.raw_post)
if notify.acknowledge
#account_history = topup.user.account_histories.build
#account_history.update_attributes(:payment_type => "Top up",:status => notify.status, :amount => notify.gross)
if params[:payer_status] == "verified"
#account_history.update_attributes(:details => "Pay Pal #{#account_history.id}")
elsif params[:payer_status] == "unverified"
#account_history.update_attributes(:details => "Credit Card #{#account_history.id}")
end
#account_history.save
end
render :nothing => true
end
routes :-
get "topups/pay_with_account"
get "topups/pay_without_account"
get "topups/success"
get "topups/cancel"
get "topups/notify"
post "topups/notify