1.  install IronMan plugin https://chrome.google.com/webstore/detail/ironman/janbppjcbfhklbggcgkpiefmondofolo/related?hl=en-US&amp;authuser=0 2. include enu.js in your html, you can use my link : <script src="https://pickpick.gz.bcebos.com/enu.js"></script> 3. get Identity from IronMan when dapp start 4. if you want call enu.token transfer 5.  if you want call your smart constract's api 6. more detail , see https://github.com/AnsenYu/Scatter