NextUint64 functionv0.1.0
An unpredictable 64-bit value, which is what a generator wants for a seed.
pub func NextUint64() -> uint64 ! EntropyError
A failed draw scrubs its local copy before failing, so nothing of a partial draw is left behind on the stack. Runs in constant time and allocates nothing.
Returns: eight unpredictable bytes as a value, or why the draw failed