update

api/controllers/CoinController.php

@@ -129,8 +129,8 @@ class CoinController extends BaseController
             throw new Exception('8', '币种不存在');
         }
         $result        = (array)$miner_fee->getAttributes();
-        $result['min'] = (float)$result['min'];
-        $result['max'] = (float)$result['max'];
+        $result['min'] = number_format($result['min'],6);
+        $result['max'] = number_format($result['max'],6);
         return $result;
     }