Struct frame_election_provider_support::onchain::OnChainExecution

pub struct OnChainExecution<T: Config>(_);

Expand description

A simple on-chain implementation of the election provider trait.

This implements both ElectionProvider and InstantElectionProvider.

This type has some utilities to make it safe. Nonetheless, it should be used with utmost care. A thoughtful value must be set as Config::Bounds to ensure the size of the input is sensible.

Trait Implementations§

impl<T: Config> ElectionProvider for OnChainExecution<T>

fn ongoing() -> bool

Indicate if this election provider is currently ongoing an asynchronous election or not.

fn elect() -> Result<BoundedSupportsOf<Self>, Self::Error>

Performs the election. This should be implemented as a self-weighing function. The implementor should register its appropriate weight at the end of execution with the system pallet directly.

impl<T: Config> ElectionProviderBase for OnChainExecution<T>

type AccountId = <<T as Config>::System as Config>::AccountId

The account identifier type.

type BlockNumber = <<<<T as Config>::System as Config>::Block as HeaderProvider>::HeaderT as Header>::Number

The block number type.

type Error = Error

The error type that is returned by the provider.

type MaxWinners = <T as Config>::MaxWinners

The upper bound on election winners that can be returned. Read more

type DataProvider = <T as Config>::DataProvider

The data provider of the election.

fn desired_targets_checked() -> Result<u32>

checked call to Self::DataProvider::desired_targets() ensuring the value never exceeds Self::MaxWinners.

impl<T: Config> InstantElectionProvider for OnChainExecution<T>

fn instant_elect( forced_input_voters_bounds: DataProviderBounds, forced_input_targets_bounds: DataProviderBounds ) -> Result<BoundedSupportsOf<Self>, Self::Error>

Auto Trait Implementations§

impl<T> RefUnwindSafe for OnChainExecution<T>where T: RefUnwindSafe,

impl<T> Send for OnChainExecution<T>where T: Send,

impl<T> Sync for OnChainExecution<T>where T: Sync,

impl<T> Unpin for OnChainExecution<T>where T: Unpin,

impl<T> UnwindSafe for OnChainExecution<T>where T: UnwindSafe,

Blanket Implementations§

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CheckedConversion for T

fn checked_from<T>(t: T) -> Option<Self>where Self: TryFrom<T>,

Convert from a value of T into an equivalent instance of Option<Self>. Read more

fn checked_into<T>(self) -> Option<T>where Self: TryInto<T>,

Consume self to return Some equivalent value of Option<T>. Read more

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IsType<T> for T

fn from_ref(t: &T) -> &T

Cast reference.

fn into_ref(&self) -> &T

Cast reference.

fn from_mut(t: &mut T) -> &mut T

Cast mutable reference.

fn into_mut(&mut self) -> &mut T

Cast mutable reference.

impl<T, Outer> IsWrappedBy<Outer> for Twhere Outer: AsRef<T> + AsMut<T> + From<T>, T: From<Outer>,

fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

impl<T> Pointable for T

const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Same<T> for T

type Output = T

Should always be Self

impl<T> SaturatedConversion for T

fn saturated_from<T>(t: T) -> Selfwhere Self: UniqueSaturatedFrom<T>,

Convert from a value of T into an equivalent instance of Self. Read more

fn saturated_into<T>(self) -> Twhere Self: UniqueSaturatedInto<T>,

Consume self to return an equivalent value of T. Read more

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<S, T> UncheckedInto<T> for Swhere T: UncheckedFrom<S>,

fn unchecked_into(self) -> T

The counterpart to unchecked_from.

impl<T, S> UniqueSaturatedInto<T> for Swhere T: Bounded, S: TryInto<T>,

fn unique_saturated_into(self) -> T

Consume self to return an equivalent value of T.

impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

impl<T> JsonSchemaMaybe for T

impl<T> MaybeRefUnwindSafe for Twhere T: RefUnwindSafe,