bd-short-message-platform/app/middleware/utils/packageItem.js

// 判断十六进制数据的长度，若长度不满足条件，则在左侧补0，直至长度满足条件
module.exports = (length, data) => {
    let item = data.toString(16);
    for (let i = 0; i < (length * 2) - data.toString(16).length; i++) {
        item = '0' + item;
    }
    return item;
};