Struct pallet_collator_selection::pallet::Pallet

pub struct Pallet<T>(_);

The pallet implementing the on-chain logic.

Implementations

impl<T: Config> Pallet<T>

pub fn set_invulnerables(
    origin: OriginFor<T>,
    new: Vec<T::AccountId>
) -> DispatchResultWithPostInfo

Set the list of invulnerable (fixed) collators.

pub fn set_desired_candidates(
    origin: OriginFor<T>,
    max: u32
) -> DispatchResultWithPostInfo

Set the ideal number of collators (not including the invulnerables). If lowering this number, then the number of running collators could be higher than this figure. Aside from that edge case, there should be no other way to have more collators than the desired number.

pub fn set_candidacy_bond(
    origin: OriginFor<T>,
    bond: <<T as Config>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance
) -> DispatchResultWithPostInfo

Set the candidacy bond amount.

pub fn register_as_candidate(origin: OriginFor<T>) -> DispatchResultWithPostInfo

Register this account as a collator candidate. The account must (a) already have registered session keys and (b) be able to reserve the CandidacyBond.

This call is not available to Invulnerable collators.

pub fn leave_intent(origin: OriginFor<T>) -> DispatchResultWithPostInfo

Deregister origin as a collator candidate. Note that the collator can only leave on session change. The CandidacyBond will be unreserved immediately.

This call will fail if the total number of candidates would drop below MinCandidates.

This call is not available to Invulnerable collators.

impl<T: Config> Pallet<T>

pub fn account_id() -> T::AccountId

Get a unique, inaccessible account id from the PotId.

pub fn assemble_collators(
    candidates: BoundedVec<T::AccountId, T::MaxCandidates>
) -> Vec<T::AccountId>

Assemble the current set of candidates and invulnerables into the next collator set.

This is done on the fly, as frequent as we are told to do so, as the session manager.

pub fn kick_stale_candidates(
    candidates: BoundedVec<CandidateInfo<T::AccountId, <<T as Config>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance>, T::MaxCandidates>
) -> BoundedVec<T::AccountId, T::MaxCandidates>

Kicks out candidates that did not produce a block in the kick threshold and refund their deposits.

impl<T: Config> Pallet<T>

pub fn invulnerables() -> BoundedVec<T::AccountId, T::MaxInvulnerables>

The invulnerable, fixed collators.

impl<T: Config> Pallet<T>

pub fn candidates(
) -> BoundedVec<CandidateInfo<T::AccountId, <<T as Config>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance>, T::MaxCandidates>

The (community, limited) collation candidates.

impl<T: Config> Pallet<T>

pub fn last_authored_block<KArg>(k: KArg) -> T::BlockNumberwhere
    KArg: EncodeLike<T::AccountId>,

Last block authored by collator.

impl<T: Config> Pallet<T>

pub fn desired_candidates() -> u32

Desired number of candidates.

This should ideally always be less than Config::MaxCandidates for weights to be correct.

impl<T: Config> Pallet<T>

pub fn candidacy_bond(
) -> <<T as Config>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance

Fixed amount to deposit to become a collator.

When a collator calls leave_intent they immediately receive the deposit back.

Trait Implementations

impl<T> Benchmarking for Pallet<T>where
    T: Config + Config + Config + Config,

fn benchmarks(extra: bool) -> Vec<BenchmarkMetadata>

Get the benchmarks available for this pallet. Generally there is one benchmark per extrinsic, so these are sometimes just called “extrinsics”.

fn run_benchmark(
    extrinsic: &[u8],
    c: &[(BenchmarkParameter, u32)],
    whitelist: &[TrackedStorageKey],
    verify: bool,
    internal_repeats: u32
) -> Result<Vec<BenchmarkResult>, BenchmarkError>

Run the benchmarks for this pallet.

impl<T: Config> Callable<T> for Pallet<T>

type Call = Call<T>

impl<T> Clone for Pallet<T>

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Pallet<T>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Config + Config> EventHandler<<T as Config>::AccountId, <T as Config>::BlockNumber> for Pallet<T>

Keep track of number of authored blocks per authority, uncles are counted as well since they’re a valid proof of being online.

fn note_author(author: T::AccountId)

Note that the given account ID is the author of the current block.

fn note_uncle(_author: T::AccountId, _age: T::BlockNumber)

Note that the given account ID authored the given uncle, and how many blocks older than the current block it is (age >= 0, so siblings are allowed)

impl<T: Config> GetStorageVersion for Pallet<T>

fn current_storage_version() -> StorageVersion

Returns the current storage version as supported by the pallet.

fn on_chain_storage_version() -> StorageVersion

Returns the on-chain storage version of the pallet as stored in the storage.

impl<T: Config> Hooks<<T as Config>::BlockNumber> for Pallet<T>

fn on_finalize(_n: BlockNumber)

The block is being finalized. Implement to have something happen.

fn on_idle(_n: BlockNumber, _remaining_weight: Weight) -> Weight

This will be run when the block is being finalized (before on_finalize). Implement to have something happen using the remaining weight. Will not fire if the remaining weight is 0. Return the weight used, the hook will subtract it from current weight used and pass the result to the next on_idle hook if it exists.

fn on_initialize(_n: BlockNumber) -> Weight

The block is being initialized. Implement to have something happen.

fn on_runtime_upgrade() -> Weight

Perform a module upgrade.

fn try_state(_n: BlockNumber) -> Result<(), &'static str>

Execute the sanity checks of this pallet, per block.

fn pre_upgrade() -> Result<(), &'static str>

Execute some pre-checks prior to a runtime upgrade.

fn post_upgrade() -> Result<(), &'static str>

Execute some post-checks after a runtime upgrade.

fn offchain_worker(_n: BlockNumber)

Implementing this function on a module allows you to perform long-running tasks that make (by default) validators generate transactions that feed results of those long-running computations back on chain.

fn integrity_test()

Run integrity test.

impl<T: Config> IntegrityTest for Pallet<T>

fn integrity_test()

Run integrity test.

impl<T: Config> OffchainWorker<<T as Config>::BlockNumber> for Pallet<T>

fn offchain_worker(n: <T as Config>::BlockNumber)

This function is being called after every block import (when fully synced).

impl<T: Config> OnFinalize<<T as Config>::BlockNumber> for Pallet<T>

fn on_finalize(n: <T as Config>::BlockNumber)

The block is being finalized. Implement to have something happen.

impl<T: Config> OnGenesis for Pallet<T>

fn on_genesis()

Something that should happen at genesis.

impl<T: Config> OnIdle<<T as Config>::BlockNumber> for Pallet<T>

fn on_idle(n: <T as Config>::BlockNumber, remaining_weight: Weight) -> Weight

The block is being finalized. Implement to have something happen in case there is leftover weight. Check the passed remaining_weight to make sure it is high enough to allow for your pallet’s extra computation.

impl<T: Config> OnInitialize<<T as Config>::BlockNumber> for Pallet<T>

fn on_initialize(n: <T as Config>::BlockNumber) -> Weight

The block is being initialized. Implement to have something happen.

impl<T: Config> OnRuntimeUpgrade for Pallet<T>

fn on_runtime_upgrade() -> Weight

Perform a module upgrade.

fn pre_upgrade() -> Result<(), &'static str>

Execute some pre-checks prior to a runtime upgrade.

fn post_upgrade() -> Result<(), &'static str>

Execute some post-checks after a runtime upgrade.

impl<T: Config> PalletInfoAccess for Pallet<T>

fn index() -> usize

Index of the pallet as configured in the runtime.

fn name() -> &'static str

Name of the pallet as configured in the runtime.

fn module_name() -> &'static str

Name of the Rust module containing the pallet.

fn crate_version() -> CrateVersion

Version of the crate containing the pallet.

impl<T: Config> PalletsInfoAccess for Pallet<T>

fn count() -> usize

The number of pallets’ information that this type represents.

fn infos() -> Vec<PalletInfoData>

All of the pallets’ information that this type represents.

impl<T> PartialEq<Pallet<T>> for Pallet<T>

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Config> SessionManager<<T as Config>::AccountId> for Pallet<T>

Play the role of the session manager.

fn new_session(index: SessionIndex) -> Option<Vec<T::AccountId>>

Plan a new session, and optionally provide the new validator set.

fn start_session(_: SessionIndex)

Start an already planned session.

fn end_session(_: SessionIndex)

End the session.

fn new_session_genesis(new_index: u32) -> Option<Vec<ValidatorId, Global>>

Same as new_session, but it this should only be called at genesis.

impl<T: Config> StorageInfoTrait for Pallet<T>

fn storage_info() -> Vec<StorageInfo>

impl<T: Config> TryState<<T as Config>::BlockNumber> for Pallet<T>

fn try_state(
    n: <T as Config>::BlockNumber,
    _s: TryStateSelect
) -> Result<(), &'static str>

Execute the state checks.

impl<T> Eq for Pallet<T>