增加订单判断$order

app/Http/Controllers/Api/SharePayController.php

@@ -27,6 +27,9 @@ class SharePayController extends Controller
 		$openid = User::query()->where('id', $this->user_id)->value('openid'); //此处要用where，value()用find有BUG
 
 		$order = Order::query()->whereIn('status', [Status::UNPAID, Status::PAY_EARNEST])->find($order_id);
+		if (!$order) {
+			return $this->error('订单不存在或已支付');
+		}
 
 		$config = config('wechat.payment.default');
 		$config = array_merge($config, [