Trait frame_election_provider_support::NposSolver

pub trait NposSolver {
    type AccountId: IdentifierT;
    type Accuracy: PerThing128;
    type Error: Debug + PartialEq;

    fn solve(
        to_elect: usize,
        targets: Vec<Self::AccountId>,
        voters: Vec<(Self::AccountId, VoteWeight, impl IntoIterator<Item = Self::AccountId>)>
    ) -> Result<ElectionResult<Self::AccountId, Self::Accuracy>, Self::Error>;
    fn weight<T: WeightInfo>(
        voters: u32,
        targets: u32,
        vote_degree: u32
    ) -> Weight;
}

Something that can compute the result to an NPoS solution.

Required Associated Types

type AccountId: IdentifierT

The account identifier type of this solver.

type Accuracy: PerThing128

The accuracy of this solver. This will affect the accuracy of the output.

type Error: Debug + PartialEq

The error type of this implementation.

Required Methods

fn solve(
    to_elect: usize,
    targets: Vec<Self::AccountId>,
    voters: Vec<(Self::AccountId, VoteWeight, impl IntoIterator<Item = Self::AccountId>)>
) -> Result<ElectionResult<Self::AccountId, Self::Accuracy>, Self::Error>

Solve an NPoS solution with the given voters, targets, and select to_elect count of targets.

fn weight<T: WeightInfo>(voters: u32, targets: u32, vote_degree: u32) -> Weight

Measure the weight used in the calculation of the solver.

• voters is the number of voters.
• targets is the number of targets.
• vote_degree is the degree ie the maximum numbers of votes per voter.

Implementors

impl<AccountId: IdentifierT, Accuracy: PerThing128, Balancing: Get<Option<BalancingConfig>>> NposSolver for PhragMMS<AccountId, Accuracy, Balancing>

type AccountId = AccountId

type Accuracy = Accuracy

type Error = Error

impl<AccountId: IdentifierT, Accuracy: PerThing128, Balancing: Get<Option<BalancingConfig>>> NposSolver for SequentialPhragmen<AccountId, Accuracy, Balancing>

type AccountId = AccountId

type Accuracy = Accuracy

type Error = Error