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Migrate pallet-randomness-collective-flip to pallet attribute macro (#9061)

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* migrate pallet-randomness-collective-flip to pallet attribute macro

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* fix some nits

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* remove some spacing things

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* remove space

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

* use tabs

Signed-off-by: koushiro <koushiro.cqx@gmail.com>
This commit is contained in:
Qinxuan Chen
2021-06-14 19:00:32 +08:00
committed by GitHub
parent c2f13a03a8
commit 6b33a79831
6 changed files with 66 additions and 36 deletions
Download Patch File Download Diff File Expand all files Collapse all files
substrate/frame/randomness-collective-flip/Cargo.toml
+4 -4
View File
@@ -16,23 +16,23 @@ targets = ["x86_64-unknown-linux-gnu"]
safe-mix = { version = "1.0", default-features = false }
codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = ["derive"] }
sp-runtime = { version = "3.0.0", default-features = false, path = "../../primitives/runtime" }
sp-std = { version = "3.0.0", default-features = false, path = "../../primitives/std" }
frame-support = { version = "3.0.0", default-features = false, path = "../support" }
frame-system = { version = "3.0.0", default-features = false, path = "../system" }
sp-std = { version = "3.0.0", default-features = false, path = "../../primitives/std" }
[dev-dependencies]
sp-core = { version = "3.0.0", path = "../../primitives/core" }
sp-io = { version = "3.0.0", path = "../../primitives/io" }
serde = { version = "1.0.101" }
[features]
default = ["std"]
std = [
"safe-mix/std",
"frame-system/std",
"codec/std",
"frame-support/std",
"sp-runtime/std",
"sp-std/std",
"frame-system/std",
"frame-support/std",
]
try-runtime = ["frame-support/try-runtime"]
substrate/frame/randomness-collective-flip/src/lib.rs
+57 -31
View File
@@ -37,33 +37,41 @@
//! ### Example - Get random seed for the current block
//!
//! ```
//! use frame_support::{decl_module, dispatch, traits::Randomness};
//! use frame_support::traits::Randomness;
//!
//! pub trait Config: frame_system::Config {}
//! #[frame_support::pallet]
//! pub mod pallet {
//! use frame_support::pallet_prelude::*;
//! use frame_system::pallet_prelude::*;
//! use super::*;
//!
//! 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(())
//! }
//! }
//! #[pallet::pallet]
//! #[pallet::generate_store(pub(super) trait Store)]
//! pub struct Pallet<T>(_);
//!
//! #[pallet::config]
//! pub trait Config: frame_system::Config + pallet_randomness_collective_flip::Config {}
//!
//! #[pallet::call]
//! impl<T: Config> Pallet<T> {
//! #[pallet::weight(0)]
//! pub fn random_module_example(origin: OriginFor<T>) -> DispatchResult {
//! let _random_value = <pallet_randomness_collective_flip::Pallet<T>>::random(&b"my context"[..]);
//! Ok(())
//! }
//! }
//! }
//! # fn main() { }
//! ```
#![cfg_attr(not(feature = "std"), no_std)]
use safe_mix::TripletMix;
use codec::Encode;
use sp_std::{prelude::*, convert::TryInto};
use sp_runtime::traits::{Hash, Saturating};
use frame_support::{
decl_module, decl_storage, traits::Randomness,
weights::Weight
};
use safe_mix::TripletMix;
use codec::Encode;
use frame_system::Config;
use frame_support::traits::Randomness;
const RANDOM_MATERIAL_LEN: u32 = 81;
@@ -73,8 +81,23 @@ fn block_number_to_index<T: Config>(block_number: T::BlockNumber) -> usize {
index.try_into().ok().expect("Something % 81 is always smaller than usize; qed")
}
decl_module! {
pub struct Module<T: Config> for enum Call where origin: T::Origin {
pub use pallet::*;
#[frame_support::pallet]
pub mod pallet {
use frame_support::pallet_prelude::*;
use frame_system::pallet_prelude::*;
use super::*;
#[pallet::pallet]
#[pallet::generate_store(pub(super) trait Store)]
pub struct Pallet<T>(_);
#[pallet::config]
pub trait Config: frame_system::Config {}
#[pallet::hooks]
impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
fn on_initialize(block_number: T::BlockNumber) -> Weight {
let parent_hash = <frame_system::Pallet<T>>::parent_hash();
@@ -85,21 +108,20 @@ decl_module! {
values[index] = parent_hash;
});
0
T::DbWeight::get().reads_writes(1, 1)
}
}
/// Series of block headers from the last 81 blocks that acts as random seed material. This
/// is arranged as a ring buffer with `block_number % 81` being the index into the `Vec` of
/// the oldest hash.
#[pallet::storage]
#[pallet::getter(fn random_material)]
pub(super) type RandomMaterial<T: Config> =
StorageValue<_, Vec<T::Hash>, ValueQuery>;
}
decl_storage! {
trait Store for Module<T: Config> as RandomnessCollectiveFlip {
/// Series of block headers from the last 81 blocks that acts as random seed material. This
/// is arranged as a ring buffer with `block_number % 81` being the index into the `Vec` of
/// the oldest hash.
RandomMaterial get(fn random_material): Vec<T::Hash>;
}
}
impl<T: Config> Randomness<T::Hash, T::BlockNumber> for Module<T> {
impl<T: Config> Randomness<T::Hash, T::BlockNumber> for Pallet<T> {
/// This randomness uses a low-influence function, drawing upon the block hashes from the
/// previous 81 blocks. Its result for any given subject will be known far in advance by anyone
/// observing the chain. Any block producer has significant influence over their block hashes
@@ -140,13 +162,15 @@ impl<T: Config> Randomness<T::Hash, T::BlockNumber> for Module<T> {
mod tests {
use crate as pallet_randomness_collective_flip;
use super::*;
use sp_core::H256;
use sp_runtime::{
testing::Header,
traits::{BlakeTwo256, Header as _, IdentityLookup},
};
use frame_system::limits;
use frame_support::{parameter_types, traits::{Randomness, OnInitialize}};
use frame_system::limits;
type UncheckedExtrinsic = frame_system::mocking::MockUncheckedExtrinsic<Test>;
type Block = frame_system::mocking::MockBlock<Test>;
@@ -196,6 +220,8 @@ mod tests {
type OnSetCode = ();
}
impl pallet_randomness_collective_flip::Config for Test {}
fn new_test_ext() -> sp_io::TestExternalities {
let t = frame_system::GenesisConfig::default().build_storage::<Test>().unwrap();
t.into()