Method getCryptoFiatPrice

rate/rate.ts:418–459

(crypto: string, fiat: string)

    
    for (const bridge of bridges) {
      try {
        console.log(`[RatePlugin] 尝试通过 ${bridge} 桥接: ${crypto} -> ${fiat}`);
        
        // 获取加密货币对稳定币价格
        const cryptoPrice = await this.fetchBinancePrice(`${crypto}${bridge}`);
        console.log(`[RatePlugin] ${crypto}${bridge} 价格: ${cryptoPrice}`);
        
        // 如果目标就是稳定币
        if (fiat.toUpperCase() === bridge) {
          return { price: cryptoPrice, lastUpdated: new Date() };
        }
        
        // 获取稳定币对法币汇率 (1 USDT = 1 USD)
        let bridgeForFiat = bridge.toLowerCase();
        if (bridge === 'USDT' || bridge === 'BUSD' || bridge === 'USDC') {
          bridgeForFiat = 'usd';
        }
        
        console.log(`[RatePlugin] 获取 ${bridgeForFiat} 到 ${fiat} 的汇率`);
        const fiatRates = await this.fetchFiatRates(bridgeForFiat);
        const fiatRate = fiatRates[fiat.toLowerCase()];
        
        if (fiatRate) {
          const finalPrice = cryptoPrice * fiatRate;
          console.log(`[RatePlugin] 最终价格: ${crypto} = ${finalPrice} ${fiat}`);
          return { price: finalPrice, lastUpdated: new Date() };
        } else {
          lastError = `无法获取 ${bridgeForFiat} 到 ${fiat} 的汇率`;
        }
      } catch (error: any) {
        lastError = `${bridge} 桥接失败: ${error.message}`;
        console.warn(`[RatePlugin] ${lastError}`);
      }
    }

    throw new Error(`无法获取 ${crypto} 对 ${fiat} 的价格。最后错误: ${lastError}`);
  }

  // 动态判断是否为法币（优先使用网络列表，失败则回退本地列表）
  private async isFiat(query: string): Promise<boolean> {
    const now = Date.now();
    // 强制刷新法币列表以确保 TRY 被正确识别
    if (!this.vsFiats || now - this.vsFiatsTs > 6 * 60 * 60 * 1000 || query.toLowerCase() === 'try') {
      // 1) CoinGecko vs_currencies
      try {