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more clear randomness API for BABE (#8180)

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* more clear randomness API for BABE

* babe: move randomness utilities to its own file

* node: use babe::RandomnessFromOneEpochAgo in random_seed implementation

* frame-support: annotate randomness trait with block number

* pallet-randomness-collective-flip: fix for new randomness trait

* pallet-society: fix randomness usage

* pallet-lottery: fix randomness usage

* pallet-contracts: fix randomness usage

* pallet-babe: fix randomness usage

we need to track when the current and previous epoch started so that we
know the block number by each existing on-chain was known

* node: fix random_seed

* node-template: fix random_seed

* frame-support: extend docs

* babe: add test for epoch starting block number tracking

* babe: fix epoch randomness docs

* frame: add todos for dealing with randomness api changes

Co-authored-by: André Silva <andrerfosilva@gmail.com>
This commit is contained in:
Robert Habermeier
2021-03-10 10:31:49 -06:00
committed by GitHub
parent f3d4355a20
commit e2960c383e
18 changed files with 286 additions and 78 deletions
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substrate/frame/contracts/src/exec.rs
+3 -1
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@@ -740,7 +740,9 @@ where
}
fn random(&self, subject: &[u8]) -> SeedOf<T> {
T::Randomness::random(subject)
// TODO: change API to expose randomness freshness
// https://github.com/paritytech/substrate/issues/8297
T::Randomness::random(subject).0
}
fn now(&self) -> &MomentOf<T> {