src/Payment/API.php
public function close($tradeNo)
    {
        $params = [
            'out_trade_no' => $tradeNo,
        ];

        return $this->request($this->wrapApi(self::API_CLOSE), $params);
    }
public function close($tradeNo)
    {
        $params = [
            'out_trade_no' => $tradeNo,
        ];

        return $this->request($this->wrapApi(self::API_CLOSE), $params);
    }
Close order by out_trade_no.

@param $tradeNo

@return \EasyWeChat\Support\Collection