Gateio Open Close Contract

const ccxt = require ('../../ccxt');


const exchange = new ccxt.gateio ({
   'apiKey': 'YOUR_API_KEY',
   'secret': 'YOUR_SECRET',
   'options': {
       'defaultType': 'swap',
       'marginMode': 'cross'
   },
})


;(async () => {

   // exchange.setSandboxMode (true)
   
   const markets = await exchange.loadMarkets ()

   // exchange.verbose = true // uncomment for debugging purposes if necessary

   // Example: creating and closing a contract
   let symbol = 'LTC/USDT:USDT'
   let type = 'market'
   let side = 'buy'
   let amount = 1
   let price = undefined

   try {
       // fetching current balance
       const balance = await exchange.fetchBalance()
       console.log(balance)

       // placing an order / opening contract position
       const order = await exchange.createOrder (symbol, type, side, amount, price)
       console.log (order)

       // closing it by issuing an oposite contract 
       // and therefore close our previous position
       side = 'sell'
       type = 'market'
       reduce_only = true
       params = {'reduce_only': reduce_only}
       const opositeOrder = await exchange.createOrder (symbol, type, side, amount, price, params)
       console.log (opositeOrder)
   } catch (e) {
       console.log (e.constructor.name, e.message)
   }
}) ()