Spitballing here but it seems you could even (re-)implement an Offset-based LN by using an alternative (non-PoW) blockchain underlying the channels. This alter

Spitballing here but it seems you could even (re-)implement an Offset-based LN by using an alternative (non-PoW) blockchain underlying the channels. This alternative blockchain would work for accounting purposes so it can be entirely local (i.e. each node has its own local blockchain).