https://medium.com/@ettie83fritschhwa/%E6%9C%80%E7%AE%80%E4%BE%BF%E7%9A%84beam-airdrop%E7%A9%BA%E6%8A%95%E9%A2%86%E5%8F%96%E6%96%B9%E6%B3%95-0c24e406e0c4