public async getSymbols() {
    const symbols = this.exchangeConnection.symbols
    if (symbols) return symbols

    await this.exchangeConnection.loadMarkets()
    return this.exchangeConnection.symbols
  }

 microseconds(): number {
     return this._exchange.microseconds();
 }

 const fn = () => this.exchangeConnection.cancelOrder(orderId)

 fetchOrderStatus(id: string, market: string): Promise<string> {
     return this._exchange.fetchOrderStatus(id, market);
 }

 public priceToPrecision(symbol: string, amount: number) {
   return Number(this.exchangeConnection.priceToPrecision(symbol, amount))
 }

 checkRequiredCredentials(): void {
     this._exchange.checkRequiredCredentials();
 }

 initRestRateLimiter(): void {
     this._exchange.initRestRateLimiter();
 }

 nonce(): number {
     return this._exchange.nonce();
 }