* Add a feature flag (that doesn't do anything yet).
* Give `clear_fr` a stronger type to prevent mistakes and ensure the
right amount of memory gets cleared.
* Re-export the engine and related types from `lib.rs`.
* Simplify Poly multiplication, speed up interpolation.
Also add more `Mul` implementations.
* Postpone division: speed up interpolation some more.
* Speed up interpolation: re-use base polynomial.
This removes some unnecessary allocation and conversion by accepting
more primitive types and references as the index in threshold decryption
and signing, and as the argument to a polynomial.
This allows the caller to address nodes by ID instead of by index.
Also contains a few other minor changes that will be needed for
`DynamicHoneyBadger`.
This is a _synchronous_ key generation algorithm. We will use it in
`DynamicHoneyBadger`, on top of `HoneyBadger` to satisfy the synchrony
requirements.
It can also be used independently e.g. on top of a blockchain.
This adds a `Hash` implementation for public keys, commitments,
ciphertexts and signatures — types that might make sense to be included
in special transactions. The `DynamicHoneyBadger` implementation will
require some of them.
Andreas Fackler