Trait frame_support::traits::Randomness [−][src]
Required methods
fn random(subject: &[u8]) -> Output
[src]
Get a “random” value
Being a deterministic blockchain, real randomness is difficult to come by. This gives you something that approximates it. At best, this will be randomness which was hard to predict a long time ago, but that has become easy to predict recently.
subject
is a context identifier and allows you to get a
different result to other callers of this function; use it like
random(&b"my context"[..])
.
Provided methods
fn random_seed() -> Output
[src]
Get the basic random seed.
In general you won’t want to use this, but rather Self::random
which allows you to give a
subject for the random result and whose value will be independently low-influence random
from any other such seeds.