The 2nd problem is how can I query the stability of all addresses generated by me with only one request to TronGrid? There are two strategies to build your own vanity address. The initial way is to do it oneself, which is probably one of the most protected way as https://thedeepdirectory.com/listings12790972/tron%E5%9C%B0%E5%9D%80%E7%94%9F%E6%88%90-options