Struct polymesh_api::polymesh::api::staking::QueryApi

pub struct QueryApi<'api> { /* private fields */ }

Implementations

impl<'api> QueryApi<'api>

pub async fn history_depth(&self) -> Result<u32>

Number of eras to keep in history.

Information is kept for eras in [current_era - history_depth; current_era].

Must be more than the number of eras delayed by session otherwise. I.e. active era must always be in history. I.e. active_era > current_era - history_depth must be guaranteed.

pub async fn validator_count(&self) -> Result<u32>

The ideal number of staking participants.

pub async fn minimum_validator_count(&self) -> Result<u32>

Minimum number of staking participants before emergency conditions are imposed.

pub async fn invulnerables(&self) -> Result<Vec<AccountId>>

Any validators that may never be slashed or forcibly kicked. It’s a Vec since they’re easy to initialize and the performance hit is minimal (we expect no more than four invulnerables) and restricted to testnets.

pub async fn bonded(&self, key_0: AccountId) -> Result<Option<AccountId>>

Map from all locked “stash” accounts to the controller account.

pub async fn ledger(
    &self,
    key_0: AccountId
) -> Result<Option<StakingLedger<AccountId, u128>>>

Map from all (unlocked) “controller” accounts to the info regarding the staking.

pub async fn payee(
    &self,
    key_0: AccountId
) -> Result<RewardDestination<AccountId>>

Where the reward payment should be made. Keyed by stash.

pub async fn validators(&self, key_0: AccountId) -> Result<ValidatorPrefs>

The map from (wannabe) validator stash key to the preferences of that validator.

pub async fn nominators(
    &self,
    key_0: AccountId
) -> Result<Option<Nominations<AccountId>>>

The map from nominator stash key to the set of stash keys of all validators to nominate.

pub async fn current_era(&self) -> Result<Option<u32>>

The current era index.

This is the latest planned era, depending on how the Session pallet queues the validator set, it might be active or not.

pub async fn active_era(&self) -> Result<Option<ActiveEraInfo>>

The active era information, it holds index and start.

The active era is the era being currently rewarded. Validator set of this era must be equal to [SessionInterface::validators].

pub async fn eras_start_session_index(&self, key_0: u32) -> Result<Option<u32>>

The session index at which the era start for the last HISTORY_DEPTH eras.

Note: This tracks the starting session (i.e. session index when era start being active) for the eras in [CurrentEra - HISTORY_DEPTH, CurrentEra].

pub async fn eras_stakers(
    &self,
    key_0: u32,
    key_1: AccountId
) -> Result<Exposure<AccountId, u128>>

Exposure of validator at era.

This is keyed first by the era index to allow bulk deletion and then the stash account.

Is it removed after HISTORY_DEPTH eras. If stakers hasn’t been set or has been removed then empty exposure is returned.

pub async fn eras_stakers_clipped(
    &self,
    key_0: u32,
    key_1: AccountId
) -> Result<Exposure<AccountId, u128>>

Clipped Exposure of validator at era.

This is similar to [ErasStakers] but number of nominators exposed is reduced to the T::MaxNominatorRewardedPerValidator biggest stakers. (Note: the field total and own of the exposure remains unchanged). This is used to limit the i/o cost for the nominator payout.

This is keyed fist by the era index to allow bulk deletion and then the stash account.

Is it removed after HISTORY_DEPTH eras. If stakers hasn’t been set or has been removed then empty exposure is returned.

pub async fn eras_validator_prefs(
    &self,
    key_0: u32,
    key_1: AccountId
) -> Result<ValidatorPrefs>

Similar to ErasStakers, this holds the preferences of validators.

This is keyed first by the era index to allow bulk deletion and then the stash account.

Is it removed after HISTORY_DEPTH eras.

pub async fn eras_validator_reward(&self, key_0: u32) -> Result<Option<u128>>

The total validator era payout for the last HISTORY_DEPTH eras.

Eras that haven’t finished yet or has been removed doesn’t have reward.

pub async fn eras_reward_points(
    &self,
    key_0: u32
) -> Result<EraRewardPoints<AccountId>>

Rewards for the last HISTORY_DEPTH eras. If reward hasn’t been set or has been removed then 0 reward is returned.

pub async fn eras_total_stake(&self, key_0: u32) -> Result<u128>

The total amount staked for the last HISTORY_DEPTH eras. If total hasn’t been set or has been removed then 0 stake is returned.

pub async fn force_era(&self) -> Result<Forcing>

Mode of era forcing.

pub async fn slash_reward_fraction(&self) -> Result<Perbill>

The percentage of the slash that is distributed to reporters.

The rest of the slashed value is handled by the Slash.

pub async fn canceled_slash_payout(&self) -> Result<u128>

The amount of currency given to reporters of a slash event which was canceled by extraordinary circumstances (e.g. governance).

pub async fn unapplied_slashes(
    &self,
    key_0: u32
) -> Result<Vec<UnappliedSlash<AccountId, u128>>>

All unapplied slashes that are queued for later.

pub async fn bonded_eras(&self) -> Result<Vec<(u32, u32)>>

A mapping from still-bonded eras to the first session index of that era.

Must contains information for eras for the range: [active_era - bounding_duration; active_era]

pub async fn validator_slash_in_era(
    &self,
    key_0: u32,
    key_1: AccountId
) -> Result<Option<(Perbill, u128)>>

All slashing events on validators, mapped by era to the highest slash proportion and slash value of the era.

pub async fn nominator_slash_in_era(
    &self,
    key_0: u32,
    key_1: AccountId
) -> Result<Option<u128>>

All slashing events on nominators, mapped by era to the highest slash value of the era.

pub async fn slashing_spans(
    &self,
    key_0: AccountId
) -> Result<Option<SlashingSpans>>

Slashing spans for stash accounts.

pub async fn span_slash(
    &self,
    key_0: (AccountId, u32)
) -> Result<SpanRecord<u128>>

Records information about the maximum slash of a stash within a slashing span, as well as how much reward has been paid out.

pub async fn earliest_unapplied_slash(&self) -> Result<Option<u32>>

The earliest era for which we have a pending, unapplied slash.

pub async fn offending_validators(&self) -> Result<Vec<(u32, bool)>>

Indices of validators that have offended in the active era and whether they are currently disabled.

This value should be a superset of disabled validators since not all offences lead to the validator being disabled (if there was no slash). This is needed to track the percentage of validators that have offended in the current era, ensuring a new era is forced if OffendingValidatorsThreshold is reached. The vec is always kept sorted so that we can find whether a given validator has previously offended using binary search. It gets cleared when the era ends.

pub async fn snapshot_validators(&self) -> Result<Option<Vec<AccountId>>>

Snapshot of validators at the beginning of the current election window. This should only have a value when [EraElectionStatus] == ElectionStatus::Open(_).

pub async fn snapshot_nominators(&self) -> Result<Option<Vec<AccountId>>>

Snapshot of nominators at the beginning of the current election window. This should only have a value when [EraElectionStatus] == ElectionStatus::Open(_).

pub async fn queued_elected(
    &self
) -> Result<Option<ElectionResult<AccountId, u128>>>

The next validator set. At the end of an era, if this is available (potentially from the result of an offchain worker), it is immediately used. Otherwise, the on-chain election is executed.

pub async fn queued_score(&self) -> Result<Option<ElectionScore>>

The score of the current [QueuedElected].

pub async fn era_election_status(&self) -> Result<ElectionStatus<u32>>

Flag to control the execution of the offchain election. When Open(_), we accept solutions to be submitted.

pub async fn is_current_session_final(&self) -> Result<bool>

True if the current planned session is final. Note that this does not take era forcing into account.

pub async fn permissioned_identity(
    &self,
    key_0: IdentityId
) -> Result<Option<PermissionedIdentityPrefs>>

Entities that are allowed to run operator/validator nodes.

pub async fn validator_commission_cap(&self) -> Result<Perbill>

Every validator has commission that should be in the range [0, Cap].

pub async fn minimum_bond_threshold(&self) -> Result<u128>

The minimum amount with which a validator can bond.

pub async fn slashing_allowed_for(&self) -> Result<SlashingSwitch>

pub async fn storage_version(&self) -> Result<Releases>

True if network has been upgraded to this version. Storage version of the pallet.

This is set to v6.0.1 for new networks.

Trait Implementations

impl<'api> Clone for QueryApi<'api>

fn clone(&self) -> QueryApi<'api>

Returns a copy of the value.

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

Performs copy-assignment from source.