This has required changing the order of some parameters and
adding HashOnRead to the Blockstore interface (which I have in turn
added to all the wrapper implementations).
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
These did not work before, and had some unnecessary complexity.
Now the filters use only one hashing function, no bignum arithmetic, and gets the additional bit positions by repeatedly hashing the result of prior hash.
Since we're not concerned about crypto hashing here, this should be a win.
External interfaces unchanged.
