I realised that checkpointing our (message) processing is similar to using cheat codes in Super Frog and similar old games.We need to recover and use the code to get where we were. Of course, sometimes that means going through the half of the level again, but well, better than from the beginning.I also shared with you implementation based on the PostgreSQL how to do it, and how checkpointing can also help in a generic idempotence check (with caution) and to detect noisy neighbours (with understanding).