let api = Bittrex(apikey: "api key", secretkey: "secret key")
api.getMarkets() { (response) in
    switch response{
        case .success(let data):
            print(data)
        case .failed(let err):
            print(err)
    }
}

api.getBalance(currency: 'BTC') { (response) in
    switch response{
        case .success(let data):
            print(data)
        case .failed(let err):
            print(err)
    }
}

    public func getMarkets()
    public func getCurrencies()
    public func getTicker()
    public func getMarketSummaries()
    public func getMarketSummary(market: String)
    public func getOrderBook(market: String)
    public func getMarketHistory(market: String)

    public func buyLimit(market: String, quantity: String, rate: String)
    public func sellLimit(market: String, quantity: String, rate: String)
    public func cancelBuySell(uuid: String)
    public func getOpenOrders(market: String)

    public func getBalances()
    public func getBalance(currency: String)
    public func getDepositAddress(currency: String)
    public func withdraw(currency: String, quantity: String, address: String)
    public func getOrder(uuid: String)
    public func getOrderHistory(uuid: String)
    public func getWithdrawalHistory(currency: String)
    public func getDepositHistory(currency: String)