| 259 | if (k === 'rm') { |
| 260 | return 'myr'; |
| 261 | } |
| 262 | |
| 263 | // 检查法币别名 |
| 264 | for (const [code, info] of Object.entries(FIAT_CURRENCIES)) { |
| 265 | if (info.aliases?.includes(k)) { |
| 266 | return code; |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | // 检查加密货币别名 |
| 271 | for (const [code, info] of Object.entries(CRYPTO_CURRENCIES)) { |
| 272 | if (info.aliases?.includes(k)) { |
| 273 | return code; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | return k; |
| 278 | } |
| 279 | |
| 280 | // 获取法币汇率（带多源回退与5分钟缓存） |
| 281 | private async fetchFiatRates(base: string): Promise<Record<string, number>> { |
| 282 | const key = base.toLowerCase(); |
| 283 | const now = Date.now(); |
| 284 | const cached = this.fiatRatesCache[key]; |
| 285 | if (cached && now - cached.ts < 5 * 60 * 1000) return cached.rates; |
| 286 | const endpoints = [ |