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impl Randomness trait for Babe and remove unused RandomBeacon trait (#4886)

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* impl Randomness trait for Babe and remove unused RandomBeacon trait

* bump runtime version
This commit is contained in:
Robert Habermeier
2020-02-11 11:07:14 +01:00
committed by GitHub
parent 0d45d12e3f
commit ea69238d03
4 changed files with 14 additions and 23 deletions
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substrate/frame/support/src/traits.rs
+4 -1
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@@ -767,7 +767,10 @@ pub trait Randomness<Output> {
/// Get a "random" value
///
/// Being a deterministic blockchain, real randomness is difficult to come by. This gives you
/// something that approximates it. `subject` is a context identifier and allows you to get a
/// 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"[..])`.
fn random(subject: &[u8]) -> Output;