diff --git a/wx/Recharge.php b/wx/Recharge.php
index 6c1ebdd..86855ce 100644
--- a/wx/Recharge.php
+++ b/wx/Recharge.php
@@ -71,10 +71,10 @@ class Recharge extends Miniprogarampage
 
 	/**
 	 * 'appId' => $result['appid'],
-	'nonceStr' => $result['nonce_str'],
-	'package' => 'prepay_id=' . $result['prepay_id'],
-	'signType' => 'MD5',
-	'timeStamp' => (string)time(),
+	 * 'nonceStr' => $result['nonce_str'],
+	 * 'package' => 'prepay_id=' . $result['prepay_id'],
+	 * 'signType' => 'MD5',
+	 * 'timeStamp' => (string)time(),
 	 * @param $prepay_id
 	 * @return array
 	 */
@@ -93,6 +93,22 @@ class Recharge extends Miniprogarampage
 		return $array;
 	}
 
+	/**
+	 * @param array $params
+	 * @return bool
+	 */
+	public function validation(array $params)
+	{
+		$sign = $params['sign'];
+		unset($params['sign']);
+
+		$nowSign = Help::sign($params, $this->config->getKey(), $sign['signType']);
+		if ($sign === $nowSign) {
+			return true;
+		}
+		return false;
+	}
+
 	/**
 	 * @return string
 	 */