require 'ib-api'
# connect with default parameters 
ib =  IB::Connection.new 

# define a contract to deal with
the_stock =  IB::Stock.new symbol: 'TAP'

# order 100 shares for 35 $ 
limit_order = IB::Order.new  limit_price: 35, order_type: 'LMT',  total_quantity: 100, action: :buy
ib.send_message :PlaceOrder,
        :order => limit_order,
        :contract => the_stock,
        :local_id => ib.next_local_id

# wait until the orderstate message returned
ib.wait_for :OrderStatus

# print the Orderstatus
puts ib.recieved[:OrderStatus].to_human

# => ["<OrderState: Submitted #17/1528367295 from 2000 filled 0.0/100.0 at 0.0/0.0 why_held >"]

ib =  IB::Connection.new do |tws|
      # Subscribe to TWS alerts/errors and order-related messages
	tws.subscribe(:Alert, :OpenOrder, :OrderStatus, :OpenOrderEnd) { |msg| puts msg.to_human }
     end

        # first define actions
	a = ib.subscribe(:Alert, :ContractData ) do |msg| 
		case msg
		when Messages::Incoming::Alert
			if msg.code == 200   # No security found 
				# do someting
			end
		when Messages::Incoming::ContractData  # security returned
			# do something
	
		end  # case
	end
        # perform request
        ib.send_message :RequestContractData, :contract => #{some contract}
         
        # wait until the :ContractDataEnd message returned
        ib.wait_for :ContractDataEnd
         
        ib.unsubscribe a    # release subscriptions