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runtime: use babe as randomness source (#2504)

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* runtime: use babe as randomness source

* runtime: fix randomness api

* bridges: fix random_seed

* parachains: use mock TestRandomness from frame_support_test

* parachains: use mock TestRandomness from frame_support_test

* runtime: update randomness source in test-runtime

* runtime: remove unused import

* parachains: add todo to audit usage of randomness api

* "Update Substrate"

Co-authored-by: parity-processbot <>
This commit is contained in:
André Silva
2021-03-10 17:22:59 +00:00
committed by GitHub
parent 9331e06eda
commit b360360544
14 changed files with 201 additions and 179 deletions
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polkadot/runtime/common/src/paras_registrar.rs
+3 -10
View File
@@ -262,9 +262,10 @@ mod tests {
};
use frame_system::limits;
use frame_support::{
traits::{Randomness, OnInitialize, OnFinalize},
traits::{OnInitialize, OnFinalize},
assert_ok, assert_noop, parameter_types,
};
use frame_support_test::TestRandomness;
use keyring::Sr25519Keyring;
use runtime_parachains::{
initializer, configuration, inclusion, session_info, scheduler, dmp, ump, hrmp, shared,
@@ -511,16 +512,8 @@ mod tests {
impl session_info::Config for Test { }
pub struct TestRandomness;
impl Randomness<H256> for TestRandomness {
fn random(_subject: &[u8]) -> H256 {
Default::default()
}
}
impl initializer::Config for Test {
type Randomness = TestRandomness;
type Randomness = TestRandomness<Self>;
}
impl scheduler::Config for Test { }
polkadot/runtime/common/src/slots.rs
+3 -2
View File
@@ -54,7 +54,7 @@ pub trait Config: frame_system::Config {
type LeasePeriod: Get<Self::BlockNumber>;
/// Something that provides randomness in the runtime.
type Randomness: Randomness<Self::Hash>;
type Randomness: Randomness<Self::Hash, Self::BlockNumber>;
}
/// Parachain registration API.
@@ -582,7 +582,8 @@ impl<T: Config> Module<T> {
let ending_period = T::EndingPeriod::get();
if early_end + ending_period == now {
// Just ended!
let offset = T::BlockNumber::decode(&mut T::Randomness::random_seed().as_ref())
let (seed, _) = T::Randomness::random_seed();
let offset = T::BlockNumber::decode(&mut seed.as_ref())
.expect("secure hashes always bigger than block numbers; qed") % ending_period;
let res = <Winning<T>>::get(offset).unwrap_or_default();
let mut i = T::BlockNumber::zero();