If all channels were hashed as tho transmit was off, then a separate hash with merkle tree is supplied for those channels that are transmitting, we can avoid changing the hash at all in the next block, when the channels are zeroed.
Proofs for interblocks can then be much simpler, as they need only prove the transmitting channels. They also would always be different, which would mask information about neighbouring channels transmission states, which can be deduced from a merkle of the channels themselves.
If all channels were hashed as tho transmit was off, then a separate hash with merkle tree is supplied for those channels that are transmitting, we can avoid changing the hash at all in the next block, when the channels are zeroed.
Proofs for interblocks can then be much simpler, as they need only prove the transmitting channels. They also would always be different, which would mask information about neighbouring channels transmission states, which can be deduced from a merkle of the channels themselves.