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Igor Matuszewski
028f3d2674
* Backport paritytech/substrate#7381 * Bring back genesis storage build in aura/timestamp To not change spec version, see https://github.com/paritytech/substrate/pull/7686#discussion_r540032743 * Backport paritytech/substrate#7238 * Backport paritytech/substrate#7395 * Bump impl_version * Fix UI tests and bump trybuild dep See https://github.com/rust-lang/rust/pull/73996 Backports: https://github.com/paritytech/substrate/pull/7764 https://github.com/paritytech/substrate/pull/7656 * Partially backport paritytech/substrate#7838 * Release frame-support with a dep compilation fix * Bump patch level for remaining crates This is done because at the time of writing cargo-unleash does not fully support partial workspace publishing and mixes both local and crates.io versions of the packages, leading to errors in the release check workflow. * Backport paritytech/substrate#7854 ...to fix compilation error when using futures-* v0.3.9. * Adding Changelog entry for patch release Co-authored-by: Bastian Köcher <git@kchr.de> Co-authored-by: Benjamin Kampmann <ben@parity.io>
Randomness Module
The Randomness Collective Flip module provides a random
function that generates low-influence random values based on the block hashes from the previous
81 blocks. Low-influence randomness can be useful when defending against relatively weak
adversaries. Using this pallet as a randomness source is advisable primarily in low-security
situations like testing.
Public Functions
See the Module struct for details of publicly available functions.
Usage
Prerequisites
Import the Randomness Collective Flip module and derive your module's configuration trait from the system trait.
Example - Get random seed for the current block
use frame_support::{decl_module, dispatch, traits::Randomness};
pub trait Config: frame_system::Config {}
decl_module! {
pub struct Module<T: Config> for enum Call where origin: T::Origin {
#[weight = 0]
pub fn random_module_example(origin) -> dispatch::DispatchResult {
let _random_value = <pallet_randomness_collective_flip::Module<T>>::random(&b"my context"[..]);
Ok(())
}
}
}
License: Apache-2.0