tradingview 信号交易机器人 出错怎么解决

新手想用trading view信号自动交易币安btc永续合约，部署机器人后出现 ，错误 Ct 合约设置为空。求大神帮看一下怎么做。。 代码是复制的TradingViewWebHook信号执行策略（教学） /*

• 交互命令字符串格式 action:amount action: buy , sell , long , short , cover_long , cover_short, spk , bpk

• 交易所类型 eType变量取值: 0 spot , 1 futures

• TV文档链接 https://www.tradingview.com/pine-script-docs/en/v4/Quickstart_guide.html https://cn.tradingview.com/chart/8xfTuX7F/

• TV webhook 发送请求 https://www.fmz.cn/api/v1?access_key=xxx&secret_key=yyyy&method=CommandRobot&args=[186515,“action:amount”]

• 引用类库 引用数字货币交易类库 */

// 参数 // var IsMarketOrder = false // var QuotePrecision = 2 // var BasePrecision = 2

// 期货参数 // var Ct = “”

// 全局变量 var BUY = “buy” var SELL = “sell” var LONG = “long” var SHORT = “short” var COVER_LONG = “cover_long” var COVER_SHORT = “cover_short” var SPK = “spk” var BPK = “bpk”

function main() { // 清空日志，如不需要，可以删除 LogReset(1)

// 设置精度
exchange.SetPrecision(QuotePrecision, BasePrecision)

// 识别期货还是现货
var eType = 0
var eName = exchange.GetName()
var patt = /Futures_/
if (patt.test(eName)) {
    Log("添加的交易所为期货交易所：", eName, "#FF0000")
    eType = 1
    if (Ct == "") {
        throw "Ct 合约设置为空"
    } else {
    	Log(exchange.SetContractType(Ct), "设置合约：", Ct, "#FF0000")
    }
} else {
	Log("添加的交易所为现货交易所：", eName, "#32CD32")
}

var lastMsg = ""
var acc = _C(exchange.GetAccount)
while(true) {
    var cmd = GetCommand()
    if (cmd) {
        // 检测交互命令
        lastMsg = "命令:" + cmd + "时间:" + _D()
        var arr = cmd.split(":")
        if (arr.length != 2) {
            Log("cmd信息有误：", cmd, "#FF0000")
            continue
        }

        var action = arr[0]
        var amount = parseFloat(arr[1])

        if (eType == 0) {
            if (action == BUY) {               
                var buyInfo = IsMarketOrder ? exchange.Buy(-1, amount) : $.Buy(amount)
                Log("buyInfo:", buyInfo)
            } else if (action == SELL) {        
                var sellInfo = IsMarketOrder ? exchange.Sell(-1, amount) : $.Sell(amount)
                Log("sellInfo:", sellInfo)
            } else {
            	Log("现货交易所不支持！", "#FF0000")
            }
        } else if (eType == 1) {
        	var tradeInfo = null
        	var ticker = _C(exchange.GetTicker)
            if (action == LONG) {
            	exchange.SetDirection("buy")
                tradeInfo = IsMarketOrder ? exchange.Buy(-1, amount) : exchange.Buy(ticker.Sell, amount)
            } else if (action == SHORT) {        
                exchange.SetDirection("sell")
                tradeInfo = IsMarketOrder ? exchange.Sell(-1, amount) : exchange.Sell(ticker.Buy, amount)
            } else if (action == COVER_LONG) {        
                exchange.SetDirection("closebuy")
                tradeInfo = IsMarketOrder ? exchange.Sell(-1, amount) : exchange.Sell(ticker.Buy, amount)
            } else if (action == COVER_SHORT) {        
            	exchange.SetDirection("closesell")
            	tradeInfo = IsMarketOrder ? exchange.Buy(-1, amount) : exchange.Buy(ticker.Sell, amount)
            } else if (action == SPK) {   // 卖出平多仓，卖出开空仓
                exchange.SetDirection("closebuy")
                var tradeInfo1 = IsMarketOrder ? exchange.Sell(-1, amount) : exchange.Sell(ticker.Buy, amount)
                exchange.SetDirection("sell")
                var tradeInfo2 = IsMarketOrder ? exchange.Sell(-1, amount) : exchange.Sell(ticker.Buy, amount)
                tradeInfo = [tradeInfo1, tradeInfo2]
            } else if (action == BPK) {   // 买入平空仓，买入开多仓
                exchange.SetDirection("closesell")
                var tradeInfo1 = IsMarketOrder ? exchange.Buy(-1, amount) : exchange.Buy(ticker.Sell, amount)
                exchange.SetDirection("buy")
                var tradeInfo2 = IsMarketOrder ? exchange.Buy(-1, amount) : exchange.Buy(ticker.Sell, amount)
                tradeInfo = [tradeInfo1, tradeInfo2]
            } else {
            	Log("期货交易所不支持！", "#FF0000")
            }
            if (tradeInfo) {
                Log("tradeInfo:", tradeInfo)
            }
        } else {
        	throw "eType error, eType:" + eType
        }
        acc = _C(exchange.GetAccount)
    }
    var tbl = {
    	type : "table", 
    	title : "状态信息", 
    	cols : ["数据"], 
    	rows : []
    }
    tbl.rows.push([JSON.stringify(acc)])
    LogStatus(_D(), eName, "上次接收到的命令：", lastMsg, "\n", "`" + JSON.stringify(tbl) + "`")
	Sleep(1000)
}

}