Method getUniversalPrice

rate/rate.ts:356–389

(symbol1: string, symbol2: string, type1: 'crypto' | 'fiat', type2: 'crypto' | 'fiat')

    // 情况1: 加密货币 -> 加密货币
    if (type1 === 'crypto' && type2 === 'crypto') {
      return await this.getCryptoCryptoPrice(s1, s2);
    }
    
    // 情况2: 加密货币 -> 法币
    if (type1 === 'crypto' && type2 === 'fiat') {
      return await this.getCryptoFiatPrice(s1, s2);
    }
    
    // 情况3: 法币 -> 加密货币
    if (type1 === 'fiat' && type2 === 'crypto') {
      try {
        const cryptoToFiat = await this.getCryptoFiatPrice(s2, s1);
        return { price: 1 / cryptoToFiat.price, lastUpdated: cryptoToFiat.lastUpdated };
      } catch (error) {
        throw new Error(`无法获取 ${s2} 对 ${s1} 的价格来计算反向汇率`);
      }
    }
    
    // 情况4: 法币 -> 法币
    if (type1 === 'fiat' && type2 === 'fiat') {
      const rates = await this.fetchFiatRates(s1.toLowerCase());
      const rate = rates[s2.toLowerCase()];
      if (!rate) throw new Error(`无法获取 ${s1} 到 ${s2} 的汇率`);
      return { price: rate, lastUpdated: new Date() };
    }

    throw new Error(`不支持的货币类型组合: ${type1} -> ${type2}`);
  }

  // 加密货币对加密货币
  private async getCryptoCryptoPrice(crypto1: string, crypto2: string): Promise<{ price: number, lastUpdated: Date }> {
    // 1. 直接交易对
    try {
      const price = await this.fetchBinancePrice(`${crypto1}${crypto2}`);
      return { price, lastUpdated: new Date() };
    } catch {}