text: """
  General constant string used in VN Trader.
  """
  
  from enum import Enum
  
  
  class Direction(Enum):
      """
      Direction of order/trade/position.
      """
      LONG = "多"
      SHORT = "空"
      NET = "净"
  
  
  class Offset(Enum):
      """
      Offset of order/trade.
      """
      NONE = ""
      OPEN = "开"
      CLOSE = "平"
      CLOSETODAY = "平今"
      CLOSEYESTERDAY = "平昨"
  
  
  class Status(Enum):
      """
      Order status.
      """
      SUBMITTING = "提交中"
      NOTTRADED = "未成交"
      PARTTRADED = "部分成交"
      ALLTRADED = "全部成交"
      CANCELLED = "已撤销"
      REJECTED = "拒单"
  
  
  class Product(Enum):
      """
      Product class.
      """
      EQUITY = "股票"
      FUTURES = "期货"
      OPTION = "期权"
      INDEX = "指数"
      FOREX = "外汇"
      SPOT = "现货"
      ETF = "ETF"
      BOND = "债券"
      WARRANT = "权证"
      SPREAD = "价差"
      FUND = "基金"
  
  
  class OrderType(Enum):
      """
      Order type.
      """
      LIMIT = "限价"
      MARKET = "市价"
      STOP = "STOP"
      FAK = "FAK"
      FOK = "FOK"
      RFQ = "询价"
  
  
  class OptionType(Enum):
      """
      Option type.
      """
      CALL = "看涨期权"
      PUT = "看跌期权"
  
  
  class Exchange(Enum):
      """
      Exchange.
      """
      # Chinese
      CFFEX = "CFFEX"         # China Financial Futures Exchange
      SHFE = "SHFE"           # Shanghai Futures Exchange
      CZCE = "CZCE"           # Zhengzhou Commodity Exchange
      DCE = "DCE"             # Dalian Commodity Exchange
      INE = "INE"             # Shanghai International Energy Exchange
      SSE = "SSE"             # Shanghai Stock Exchange
      SZSE = "SZSE"           # Shenzhen Stock Exchange
      SGE = "SGE"             # Shanghai Gold Exchange
      WXE = "WXE"             # Wuxi Steel Exchange
      CFETS = "CFETS"         # China Foreign Exchange Trade System
  
      # Global
      SMART = "SMART"         # Smart Router for US stocks
      NYSE = "NYSE"           # New York Stock Exchnage
      NASDAQ = "NASDAQ"       # Nasdaq Exchange
      ARCA = "ARCA"           # ARCA Exchange
      EDGEA = "EDGEA"         # Direct Edge Exchange
      ISLAND = "ISLAND"       # Nasdaq Island ECN
      BATS = "BATS"           # Bats Global Markets
      IEX = "IEX"             # The Investors Exchange
      NYMEX = "NYMEX"         # New York Mercantile Exchange
      COMEX = "COMEX"         # COMEX of CME
      GLOBEX = "GLOBEX"       # Globex of CME
      IDEALPRO = "IDEALPRO"   # Forex ECN of Interactive Brokers
      CME = "CME"             # Chicago Mercantile Exchange
      ICE = "ICE"             # Intercontinental Exchange
      SEHK = "SEHK"           # Stock Exchange of Hong Kong
      HKFE = "HKFE"           # Hong Kong Futures Exchange
      HKSE = "HKSE"           # Hong Kong Stock Exchange
      SGX = "SGX"             # Singapore Global Exchange
      CBOT = "CBT"            # Chicago Board of Trade
      CBOE = "CBOE"           # Chicago Board Options Exchange
      CFE = "CFE"             # CBOE Futures Exchange
      DME = "DME"             # Dubai Mercantile Exchange
      EUREX = "EUX"           # Eurex Exchange
      APEX = "APEX"           # Asia Pacific Exchange
      LME = "LME"             # London Metal Exchange
      BMD = "BMD"             # Bursa Malaysia Derivatives
      TOCOM = "TOCOM"         # Tokyo Commodity Exchange
      EUNX = "EUNX"           # Euronext Exchange
      KRX = "KRX"             # Korean Exchange
      OTC = "OTC"             # OTC Forex Broker
      IBKRATS = "IBKRATS"     # Paper Trading Exchange of IB
  
      # CryptoCurrency
      BITMEX = "BITMEX"
      OKEX = "OKEX"
      HUOBI = "HUOBI"
      BITFINEX = "BITFINEX"
      BINANCE = "BINANCE"
      BYBIT = "BYBIT"         # bybit.com
      COINBASE = "COINBASE"
      DERIBIT = "DERIBIT"
      GATEIO = "GATEIO"
      BITSTAMP = "BITSTAMP"
  
      # Special Function
      LOCAL = "LOCAL"         # For local generated data
  
  
  class Currency(Enum):
      """
      Currency.
      """
      USD = "USD"
      HKD = "HKD"
      CNY = "CNY"
  
  
  class Interval(Enum):
      """
      Interval of bar data.
      """
      MINUTE = "1m"
      #####################
      # fangyang add
      MINUTE_5 = "5m"
      MINUTE_15 = "15m"
      MINUTE_30 = "30m"
      #####################
      HOUR = "1h"
      DAILY = "d"
      WEEKLY = "w"
  