代码如下：

wx.addCard({
  cardList: [{
    cardId: '******************',
    cardExt: '{"timestamp":"*************","nonce_str":"*************","signature":"*************","api_ticket:":"****************"}'
  }], // 需要添加的卡券列表
  success: function (res) {
    var cardList = res.cardList; // 添加的卡券列表信息
  }
});

addCard:fail