GetMeta

获取在生成策略注册码时写入的Meta值。

    
    
    
GetMeta()

示例

• 读取生成注册码时写入的Meta。

  • javascript
  • python
  • rust

  
      javascript
      
      
  function main() {
      var meta = GetMeta()
      Log("Meta", meta)
      // 输出：Meta level1（生成注册码时写入的值；没有设置时为null）
  }
  

  
      python
      
      
  def main():
      meta = GetMeta()
      Log("Meta", meta)
      # 输出：Meta level1（生成注册码时写入的值；没有设置时为null）
  

  
      rust
      
      
  fn main() {
      let meta = GetMeta();
      Log!("Meta", meta);
      // 输出：Meta level1（生成注册码时写入的值；没有设置时为null）
  }
  

• 应用场景范例：使用Meta限制策略可操作的资产数量。

  • javascript
  • python
  • rust

  
      javascript
      
      
  function main() {
      // 策略允许的计价币最大资产数值
      var maxBaseCurrency = null
  
      // 获取创建注册码时的元数据
      var level = GetMeta()
  
      // 检测Meta对应的条件
      if (level == "level1") {
          // -1为不限制
          maxBaseCurrency = -1
      } else if (level == "level2") {
          maxBaseCurrency = 10
      } else if (level == "level3") {
          maxBaseCurrency = 1
      } else {
          maxBaseCurrency = 0.5
      }
  
      while(1) {
          Sleep(1000)
          var ticker = exchange.GetTicker()
  
          // 检测资产数值
          var acc = exchange.GetAccount()
          if (maxBaseCurrency != -1 && maxBaseCurrency < acc.Stocks + acc.FrozenStocks) {
              // 停止执行策略交易逻辑
              LogStatus(_D(), "level:", level, "Position exceeds registration code limit, strategy trading logic will not execute!")
              continue
          }
  
          // 其它交易逻辑
  
          // 正常输出状态栏信息
          LogStatus(_D(), "level:", level, "Strategy running normally! ticker data:\n", ticker)
      }
  }
  

  
      python
      
      
  def main():
      maxBaseCurrency = None
      level = GetMeta()
  
      if level == "level1":
          maxBaseCurrency = -1
      elif level == "level2":
          maxBaseCurrency = 10
      elif level == "level3":
          maxBaseCurrency = 1
      else:
          maxBaseCurrency = 0.5
  
      while True:
          Sleep(1000)
          ticker = exchange.GetTicker()
          acc = exchange.GetAccount()
          if maxBaseCurrency != -1 and maxBaseCurrency < acc["Stocks"] + acc["FrozenStocks"]:
              LogStatus(_D(), "level:", level, "Position exceeds registration code limit, strategy trading logic will not execute!")
              continue
  
          # 其它交易逻辑
  
          # 正常输出状态栏信息
          LogStatus(_D(), "level:", level, "Strategy running normally! ticker data:\n", ticker)
  

  
      rust
      
      
  fn main() {
      // 策略允许的计价币最大资产数值
      let maxBaseCurrency;
  
      // 获取创建注册码时的元数据，Rust 的 GetMeta() 返回 JsonValue 类型
      let meta = GetMeta();
      let level = meta.as_str().unwrap_or("");
  
      // 检测Meta对应的条件
      if level == "level1" {
          // -1为不限制
          maxBaseCurrency = -1.0;
      } else if level == "level2" {
          maxBaseCurrency = 10.0;
      } else if level == "level3" {
          maxBaseCurrency = 1.0;
      } else {
          maxBaseCurrency = 0.5;
      }
  
      loop {
          Sleep(1000);
          let ticker = exchange.GetTicker(None).unwrap();
  
          // 检测资产数值
          let acc = exchange.GetAccount().unwrap();
          if maxBaseCurrency != -1.0 && maxBaseCurrency < acc.Stocks + acc.FrozenStocks {
              // 停止执行策略交易逻辑
              LogStatus!(_D(None), "level:", level, "Position exceeds registration code limit, strategy trading logic will not execute!");
              continue;
          }
  
          // 其它交易逻辑
  
          // 正常输出状态栏信息
          LogStatus!(_D(None), "level:", level, "Strategy running normally! ticker data:\n", ticker);
      }
  }
  

返回值

参考

备注

应用场景：需要对不同的策略租用者进行资金限制。生成注册码时设置的Meta值长度不能超过190个字符。GetMeta()函数仅支持实盘，在回测系统中不起作用。如果生成策略注册码时未设置元数据（Meta），GetMeta()函数将返回空值。