已解决代码参数代入即可：        $signData = [

            'offerId'      => $merchantConfig['offerId'],

            'buyQuantity'  => (int)bcmul($order['pay_price'], (string)100),

//            'buyQuantity'  => 1,

            'env'          => 0,

            'currencyType' => 'CNY',

            'outTradeNo'   => $order['order_no'],

            'attach'       => 'pay'

        ];

        $signDataStr = json_encode($signData);

        $orderParams = [

            'signData' => $signDataStr,

            'mode'     => 'short_series_coin', //代币直充

        ];

        $orderParams['paySig'] = hash_hmac('sha256', 'requestVirtualPayment&' . $signDataStr, $merchantConfig['appKey']);

        $orderParams['signature'] = hash_hmac('sha256', $signDataStr, $session['session_key']);