流支付很有意思:
https://blog.yfgeek.com/2021/01/24/%E8%B5%B0%E8%BF%9B%E6%B5%81%E5%BC%8F%E4%BB%98%E6%AC%BE%E7%9A%84%E4%B8%96%E7%95%8C%20Sablier%20%E6%BA%90%E7%A0%81%E8%A7%A3%E8%AF%BB/