Method getCryptoCryptoPrice

rate/rate.ts:392–415

(crypto1: string, crypto2: string)

      const price = await this.fetchBinancePrice(`${crypto1}${crypto2}`);
      return { price, lastUpdated: new Date() };
    } catch {}

    try {
      const price = await this.fetchBinancePrice(`${crypto2}${crypto1}`);
      return { price: 1 / price, lastUpdated: new Date() };
    } catch {}

    // 2. 通过稳定币桥接
    const bridges = ['USDT', 'BUSD', 'USDC'];
    for (const bridge of bridges) {
      try {
        const price1 = await this.fetchBinancePrice(`${crypto1}${bridge}`);
        const price2 = await this.fetchBinancePrice(`${crypto2}${bridge}`);
        return { price: price1 / price2, lastUpdated: new Date() };
      } catch {}
    }

    throw new Error(`无法找到 ${crypto1} 和 ${crypto2} 之间的交易对`);
  }

  // 加密货币对法币
  private async getCryptoFiatPrice(crypto: string, fiat: string): Promise<{ price: number, lastUpdated: Date }> {
    const bridges = ['USDT', 'BUSD', 'USDC'];
    let lastError: string = '';
    
    for (const bridge of bridges) {
      try {