https://github.com/AElfProject/aelf-block-api/blob/6ddb8256b0ad76d96816e6551a3f63e0ba3edac1/app/service/token.js#L61-L64 --- ###### This issue was generated by [todo](https://todo.jasonet.co) based on a `TODO` comment in 6ddb8256b0ad76d96816e6551a3f63e0ba3edac1. It's been assigned to @hzz780 because they committed the code.