配置证书

app/AdminAgent/Extensions/Grid/AuditRefund.php

@@ -70,6 +70,8 @@ class AuditRefund extends RowAction
 				'mch_id' => '1606181693',
 				'key' => 'lfyyhyz8888888888888888888888888',
 				'notify_url' => route('wxpay_refund', $agent->id),
+				'cert_path' => env('WECHAT_CERT'),
+				'key_path' => env('WECHAT_KEY'),
 			]);
 			$app = Factory::payment($config);