修复已知问题

api/controllers/CoinController.php

@@ -374,7 +374,7 @@ class CoinController extends BaseController
         $service = new Chain33Business();
         $result = $service->getProperFee();
         if (0 === $result['code']) {
-            $platform_with_hold['bty_fee'] = (float)sprintf("%0.4f", $result['result']['properFee'] / 1e8);
+            $platform_with_hold['bty_fee'] = (float)sprintf("%0.4f", $result['result']['properFee'] / 1e8) > 0.01 ? 0.01 : (float)sprintf("%0.4f", $result['result']['properFee'] / 1e8);
         } else {
             $platform_with_hold['bty_fee'] = (float)sprintf("%0.4f", Yii::$app->params['bty_fee']);
         }