Hi Antoine,
>> "I also think resizing channels can be done fairly effectively
>off-chain
>with hierarchical channels [1] (and even better with hierarchical channels
>within timeout-trees)".
>Yes, transactional scaling of Lightning (i.e how many transfers can be
>performed off-chain per on-chain
I updated the draft BIP with a proposed reference implementation and a
link to an implementation of a caching strategy.
It shows that it's possible to achieve TXHASH in a way that after each
large tx element (scripts, annexes) has been hashed exactly once,
invocations of TXHASH have clear cons
