ib-api

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
	q =  Queue.new    # Initialize as Queue
	request_id = nil  # declare variable
	a = ib.subscribe(:Alert, :ContractData, :ContractDataEnd ) do |msg| 
		case msg
		when Messages::Incoming::Alert
			q.close if msg.code == 200   # No security found 
		when Messages::Incoming::ContractData  # security returned
			q.push msg.contract if msg.request_id == request_id
	        when Messages::Incoming::ContractDataEnd
		       q.close if msg.request_id == request_id
		end  # case
	end
        # perform request
        request_id = ib.send_message :RequestContractData, :contract => Stock.new(symbol: 'T')
        
	while contract = q.pop 
	  puts contract.as_table 
	end
┌───────┬────────┬──────────┬──────────┬────────┬────────────┬───────────────┬───────┬────────┬──────────┐
│       │ symbol │ con_id   │ exchange │ expiry │ multiplier │ trading-class │ right │ strike │ currency │
╞═══════╪════════╪══════════╪══════════╪════════╪════════════╪═══════════════╪═══════╪════════╪══════════╡
│ Stock │ T      │ 37018770 │  SMART   │        │            │       T       │       │        │   USD    │
└───────┴────────┴──────────┴──────────┴────────┴────────────┴───────────────┴───────┴────────┴──────────┘
  
        ib.unsubscribe a    # release subscriptions