add:添加短链接服务

queue/logic/task/rateLogic.go

@@ -32,9 +32,17 @@ func (l *RateLogic) ProcessTask(ctx context.Context, _ *asynq.Task) error {
 		CurrencyUnit   string
 		CurrencySymbol string
 		AccessKey      string
+		FixedRate      float64
 	}{}
 	tool.SystemConfigSliceReflectToStruct(currency, &configs)
 
+	// Check if fixed rate is enabled (greater than 0)
+	if configs.FixedRate > 0 {
+		l.svcCtx.ExchangeRate = configs.FixedRate
+		logger.WithContext(ctx).Infof("[RateLogic] Use Fixed Exchange Rate: %f", configs.FixedRate)
+		return nil
+	}
+
 	// Skip conversion if no exchange rate API key configured
 	if configs.AccessKey == "" {
 		logger.Debugf("[RateLogic] skip exchange rate, no access key configured")