If you want to learn more about the details of how path building to find a valid chain works, this post by Ryan Sleevi is pretty good: Path Building vs Path Verifying: The Chain of Pain | by Ryan Sleevi | Medium
If you want to learn more about the details of how path building to find a valid chain works, this post by Ryan Sleevi is pretty good: Path Building vs Path Verifying: The Chain of Pain | by Ryan Sleevi | Medium