Staking

Calls

bond

Take the origin account as a stash and lock up value of its balance. controller will be the account that controls it.

value must be more than the minimum_balance specified by T::Currency.

The dispatch origin for this call must be Signed by the stash account.

Emits Bonded.

Namespace

api.tx.staking.bond

Type

function bond(
  controller: SeedPrimitivesSignatureAccountId20,
  value: Compact<u128>,
  payee: PalletStakingRewardDestination
)

bondExtra

Add some extra amount that have appeared in the stash free_balance into the balance up for staking.

The dispatch origin for this call must be Signed by the stash, not the controller.

Use this if there are additional funds in your stash account that you wish to bond. Unlike bond or unbond this function does not impose any limitation on the amount that can be added.

Emits Bonded.

Namespace

api.tx.staking.bondExtra

Type

function bondExtra(
  max_additional: Compact<u128>
)

cancelDeferredSlash

Cancel enactment of a deferred slash.

Can be called by the T::SlashCancelOrigin.

Parameters: era and indices of the slashes for that era to kill.

Namespace

api.tx.staking.cancelDeferredSlash

Type

function cancelDeferredSlash(
  era: u32,
  slash_indices: Vec<u32>
)

chill

Declare no desire to either validate or nominate.

Effects will be felt at the beginning of the next era.

The dispatch origin for this call must be Signed by the controller, not the stash.

Namespace

api.tx.staking.chill

Type

function chill(

)

chillOther

Declare a controller to stop participating as either a validator or nominator.

Effects will be felt at the beginning of the next era.

The dispatch origin for this call must be Signed, but can be called by anyone.

If the caller is the same as the controller being targeted, then no further checks are enforced, and this function behaves just like chill.

If the caller is different than the controller being targeted, the following conditions must be met:

controller must belong to a nominator who has become non-decodable,

Or:

A ChillThreshold must be set and checked which defines how close to the max nominators or validators we must reach before users can start chilling one-another.
A MaxNominatorCount and MaxValidatorCount must be set which is used to determine how close we are to the threshold.
A MinNominatorBond and MinValidatorBond must be set and checked, which determines if this is a person that should be chilled because they have not met the threshold bond required.

This can be helpful if bond requirements are updated, and we need to remove old users who do not satisfy these requirements.

Namespace

api.tx.staking.chillOther

Type

function chillOther(
  controller: SeedPrimitivesSignatureAccountId20
)

forceApplyMinCommission

Force a validator to have at least the minimum commission. This will not affect a validator who already has a commission greater than or equal to the minimum. Any account can call this.

Namespace

api.tx.staking.forceApplyMinCommission

Type

function forceApplyMinCommission(
  validator_stash: SeedPrimitivesSignatureAccountId20
)

forceNewEra

Force there to be a new era at the end of the next session. After this, it will be reset to normal (non-forced) behaviour.

The dispatch origin must be Root.

Warning: The election process starts multiple blocks before the end of the era. If this is called just before a new era is triggered, the election process may not have enough blocks to get a result.

Namespace

api.tx.staking.forceNewEra

Type

function forceNewEra(

)

forceNewEraAlways

Force there to be a new era at the end of sessions indefinitely.

The dispatch origin must be Root.

Namespace

api.tx.staking.forceNewEraAlways

Type

function forceNewEraAlways(

)

forceNoEras

Force there to be no new eras indefinitely.

The dispatch origin must be Root.

Warning: The election process starts multiple blocks before the end of the era. Thus the election process may be ongoing when this is called. In this case, the election will continue until the next era is triggered.

Namespace

api.tx.staking.forceNoEras

Type

function forceNoEras(

)

forceUnstake

Force a current staker to become completely unstaked, immediately.

The dispatch origin must be Root.

Namespace

api.tx.staking.forceUnstake

Type

function forceUnstake(
  stash: SeedPrimitivesSignatureAccountId20,
  num_slashing_spans: u32
)

increaseValidatorCount

Increments the ideal number of validators.

The dispatch origin must be Root.

Namespace

api.tx.staking.increaseValidatorCount

Type

function increaseValidatorCount(
  additional: Compact<u32>
)

kick

Remove the given nominations from the calling validator.

Effects will be felt at the beginning of the next era.

The dispatch origin for this call must be Signed by the controller, not the stash.

who: A list of nominator stash accounts who are nominating this validator which should no longer be nominating this validator.

Note: Making this call only makes sense if you first set the validator preferences to block any further nominations.

Namespace

api.tx.staking.kick

Type

function kick(
  who: Vec<SeedPrimitivesSignatureAccountId20>
)

nominate

Declare the desire to nominate targets for the origin controller.

Effects will be felt at the beginning of the next era.

The dispatch origin for this call must be Signed by the controller, not the stash.

Namespace

api.tx.staking.nominate

Type

function nominate(
  targets: Vec<SeedPrimitivesSignatureAccountId20>
)

payoutStakers

Pay out all the stakers behind a single validator for a single era.

validator_stash is the stash account of the validator. Their nominators, up to T::MaxNominatorRewardedPerValidator, will also receive their rewards.
era may be any era between [current_era - history_depth; current_era].

The origin of this call must be Signed. Any account can call this function, even if it is not one of the stakers.

Namespace

api.tx.staking.payoutStakers

Type

function payoutStakers(
  validator_stash: SeedPrimitivesSignatureAccountId20,
  era: u32
)

reapStash

Remove all data structures concerning a staker/stash once it is at a state where it can be considered dust in the staking system. The requirements are:

the total_balance of the stash is below existential deposit. 2. or, the ledger.total of the stash is below existential deposit.

The former can happen in cases like a slash; the latter when a fully unbonded account is still receiving staking rewards in RewardDestination::Staked.

It can be called by anyone, as long as stash meets the above requirements.

Refunds the transaction fees upon successful execution.

Namespace

api.tx.staking.reapStash

Type

function reapStash(
  stash: SeedPrimitivesSignatureAccountId20,
  num_slashing_spans: u32
)

rebond

Rebond a portion of the stash scheduled to be unlocked.

The dispatch origin must be signed by the controller.

Namespace

api.tx.staking.rebond

Type

function rebond(
  value: Compact<u128>
)

scaleValidatorCount

Scale up the ideal number of validators by a factor.

The dispatch origin must be Root.

Namespace

api.tx.staking.scaleValidatorCount

Type

function scaleValidatorCount(
  factor: Percent
)

setController

(Re-)set the controller of a stash.

Effects will be felt instantly (as soon as this function is completed successfully).

The dispatch origin for this call must be Signed by the stash, not the controller.

Namespace

api.tx.staking.setController

Type

function setController(
  controller: SeedPrimitivesSignatureAccountId20
)

setInvulnerables

Set the validators who cannot be slashed (if any).

The dispatch origin must be Root.

Namespace

api.tx.staking.setInvulnerables

Type

function setInvulnerables(
  invulnerables: Vec<SeedPrimitivesSignatureAccountId20>
)

setPayee

(Re-)set the payment target for a controller.

Effects will be felt instantly (as soon as this function is completed successfully).

The dispatch origin for this call must be Signed by the controller, not the stash.

Namespace

api.tx.staking.setPayee

Type

function setPayee(
  payee: PalletStakingRewardDestination
)

setStakingConfigs

Update the various staking configurations .

min_nominator_bond: The minimum active bond needed to be a nominator.
min_validator_bond: The minimum active bond needed to be a validator.
max_nominator_count: The max number of users who can be a nominator at once. When set to None, no limit is enforced.
max_validator_count: The max number of users who can be a validator at once. When set to None, no limit is enforced.
chill_threshold: The ratio of max_nominator_count or max_validator_count which should be filled in order for the chill_other transaction to work.
min_commission: The minimum amount of commission that each validators must maintain. This is checked only upon calling validate. Existing validators are not affected.

RuntimeOrigin must be Root to call this function.

NOTE: Existing nominators and validators will not be affected by this update. to kick people under the new limits, chill_other should be called.

Namespace

api.tx.staking.setStakingConfigs

Type

function setStakingConfigs(
  min_nominator_bond: PalletStakingPalletConfigOpU128,
  min_validator_bond: PalletStakingPalletConfigOpU128,
  max_nominator_count: PalletStakingPalletConfigOpU32,
  max_validator_count: PalletStakingPalletConfigOpU32,
  chill_threshold: PalletStakingPalletConfigOpPercent,
  min_commission: PalletStakingPalletConfigOpPerbill
)

setValidatorCount

Sets the ideal number of validators.

The dispatch origin must be Root.

Namespace

api.tx.staking.setValidatorCount

Type

function setValidatorCount(
  new: Compact<u32>
)

unbond

Schedule a portion of the stash to be unlocked ready for transfer out after the bond period ends. If this leaves an amount actively bonded less than T::Currency::minimum_balance(), then it is increased to the full amount.

The dispatch origin for this call must be Signed by the controller, not the stash.

Once the unlock period is done, you can call withdraw_unbonded to actually move the funds out of management ready for transfer.

No more than a limited number of unlocking chunks (see MaxUnlockingChunks) can co-exists at the same time. In that case, [Call::withdraw_unbonded] need to be called first to remove some of the chunks (if possible).

If a user encounters the InsufficientBond error when calling this extrinsic, they should call chill first in order to free up their bonded funds.

Emits Unbonded.

validate

Declare the desire to validate for the origin controller.

Effects will be felt at the beginning of the next era.

The dispatch origin for this call must be Signed by the controller, not the stash.

Namespace

api.tx.staking.validate

Type

function validate(
  prefs: PalletStakingValidatorPrefs
)

withdrawUnbonded

Remove any unlocked chunks from the unlocking queue from our management.

This essentially frees up that balance to be used by the stash account to do whatever it wants.

The dispatch origin for this call must be Signed by the controller.

Emits Withdrawn.

Storage

activeEra

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].

Namespace

api.query.staking.activeEra

Type

function activeEra(

): Option<PalletStakingActiveEraInfo>

bonded

Map from all locked "stash" accounts to the controller account.

Namespace

api.query.staking.bonded

Type

function bonded(
  SeedPrimitivesSignatureAccountId20
): Option<SeedPrimitivesSignatureAccountId20>

bondedEras

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]

Namespace

api.query.staking.bondedEras

Type

function bondedEras(

): Vec<(u32,u32)>

canceledSlashPayout

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

Namespace

api.query.staking.canceledSlashPayout

Type

function canceledSlashPayout(

): u128

chillThreshold

The threshold for when users can start calling chill_other for other validators / nominators. The threshold is compared to the actual number of validators / nominators (CountFor*) in the system compared to the configured max (Max*Count).

Namespace

api.query.staking.chillThreshold

Type

function chillThreshold(

): Option<Percent>

counterForNominators

Counter for the related counted storage map

Namespace

api.query.staking.counterForNominators

Type

function counterForNominators(

): u32

counterForValidators

Counter for the related counted storage map

Namespace

api.query.staking.counterForValidators

Type

function counterForValidators(

): u32

currentEra

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.

Namespace

api.query.staking.currentEra

Type

function currentEra(

): Option<u32>

currentPlannedSession

The last planned session scheduled by the session pallet.

This is basically in sync with the call to [pallet_session::SessionManager::new_session].

Namespace

api.query.staking.currentPlannedSession

Type

function currentPlannedSession(

): u32

erasRewardPoints

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

Namespace

api.query.staking.erasRewardPoints

Type

function erasRewardPoints(
  u32
): PalletStakingEraRewardPoints

erasStakers

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.

Namespace

api.query.staking.erasStakers

Type

function erasStakers(
  u32,
  SeedPrimitivesSignatureAccountId20
): PalletStakingExposure

erasStakersClipped

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.

Namespace

api.query.staking.erasStakersClipped

Type

function erasStakersClipped(
  u32,
  SeedPrimitivesSignatureAccountId20
): PalletStakingExposure

erasStartSessionIndex

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].

Namespace

api.query.staking.erasStartSessionIndex

Type

function erasStartSessionIndex(
  u32
): Option<u32>

erasTotalStake

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.

Namespace

api.query.staking.erasTotalStake

Type

function erasTotalStake(
  u32
): u128

erasValidatorPrefs

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.

Namespace

api.query.staking.erasValidatorPrefs

Type

function erasValidatorPrefs(
  u32,
  SeedPrimitivesSignatureAccountId20
): PalletStakingValidatorPrefs

erasValidatorReward

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.

Namespace

api.query.staking.erasValidatorReward

Type

function erasValidatorReward(
  u32
): Option<u128>

forceEra

Mode of era forcing.

Namespace

api.query.staking.forceEra

Type

function forceEra(

): PalletStakingForcing

invulnerables

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.

Namespace

api.query.staking.invulnerables

Type

function invulnerables(

): Vec<SeedPrimitivesSignatureAccountId20>

ledger

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

Namespace

api.query.staking.ledger

Type

function ledger(
  SeedPrimitivesSignatureAccountId20
): Option<PalletStakingStakingLedger>

maxNominatorsCount

The maximum nominator count before we stop allowing new validators to join.

When this value is not set, no limits are enforced.

Namespace

api.query.staking.maxNominatorsCount

Type

function maxNominatorsCount(

): Option<u32>

maxValidatorsCount

The maximum validator count before we stop allowing new validators to join.

When this value is not set, no limits are enforced.

Namespace

api.query.staking.maxValidatorsCount

Type

function maxValidatorsCount(

): Option<u32>

minCommission

The minimum amount of commission that validators can set.

If set to 0, no limit exists.

Namespace

api.query.staking.minCommission

Type

function minCommission(

): Perbill

minimumValidatorCount

Minimum number of staking participants before emergency conditions are imposed.

Namespace

api.query.staking.minimumValidatorCount

Type

function minimumValidatorCount(

): u32

minNominatorBond

The minimum active bond to become and maintain the role of a nominator.

Namespace

api.query.staking.minNominatorBond

Type

function minNominatorBond(

): u128

minValidatorBond

The minimum active bond to become and maintain the role of a validator.

Namespace

api.query.staking.minValidatorBond

Type

function minValidatorBond(

): u128

nominators

The map from nominator stash key to their nomination preferences, namely the validators that they wish to support.

Note that the keys of this storage map might become non-decodable in case the [Config::MaxNominations] configuration is decreased. In this rare case, these nominators are still existent in storage, their key is correct and retrievable (i.e. contains_key indicates that they exist), but their value cannot be decoded. Therefore, the non-decodable nominators will effectively not-exist, until they re-submit their preferences such that it is within the bounds of the newly set Config::MaxNominations.

This implies that ::iter_keys().count() and ::iter().count() might return different values for this map. Moreover, the main ::count() is aligned with the former, namely the number of keys that exist.

Lastly, if any of the nominators become non-decodable, they can be chilled immediately via [Call::chill_other] dispatchable by anyone.

Namespace

api.query.staking.nominators

Type

function nominators(
  SeedPrimitivesSignatureAccountId20
): Option<PalletStakingNominations>

nominatorSlashInEra

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

Namespace

api.query.staking.nominatorSlashInEra

Type

function nominatorSlashInEra(
  u32,
  SeedPrimitivesSignatureAccountId20
): Option<u128>

offendingValidators

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.

Namespace

api.query.staking.offendingValidators

Type

function offendingValidators(

): Vec<(u32,bool)>

payee

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

Namespace

api.query.staking.payee

Type

function payee(
  SeedPrimitivesSignatureAccountId20
): PalletStakingRewardDestination

slashingSpans

Slashing spans for stash accounts.

Namespace

api.query.staking.slashingSpans

Type

function slashingSpans(
  SeedPrimitivesSignatureAccountId20
): Option<PalletStakingSlashingSlashingSpans>

slashRewardFraction

The percentage of the slash that is distributed to reporters.

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

Namespace

api.query.staking.slashRewardFraction

Type

function slashRewardFraction(

): Perbill

spanSlash

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

Namespace

api.query.staking.spanSlash

Type

function spanSlash(
  (SeedPrimitivesSignatureAccountId20,u32)
): PalletStakingSlashingSpanRecord

storageVersion

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

This is set to v7.0.0 for new networks.

Namespace

api.query.staking.storageVersion

Type

function storageVersion(

): PalletStakingReleases

unappliedSlashes

All unapplied slashes that are queued for later.

Namespace

api.query.staking.unappliedSlashes

Type

function unappliedSlashes(
  u32
): Vec<PalletStakingUnappliedSlash>

validatorCount

The ideal number of staking participants.

Namespace

api.query.staking.validatorCount

Type

function validatorCount(

): u32

validators

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

Namespace

api.query.staking.validators

Type

function validators(
  SeedPrimitivesSignatureAccountId20
): PalletStakingValidatorPrefs

validatorSlashInEra

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

Namespace

api.query.staking.validatorSlashInEra

Type

function validatorSlashInEra(
  u32,
  SeedPrimitivesSignatureAccountId20
): Option<(Perbill,u128)>

Events

Bonded

An account has bonded this amount. [stash, amount]

NOTE: This event is only emitted when funds are bonded via a dispatchable. Notably, it will not be emitted for staking rewards when they are added to stake.

Namespace

api.events.staking.Bonded

Type

type Bonded = {
  stash: SeedPrimitivesSignatureAccountId20,
  amount: u128
}

Chilled

An account has stopped participating as either a validator or nominator.

Namespace

api.events.staking.Chilled

Type

type Chilled = {
  stash: SeedPrimitivesSignatureAccountId20
}

EraPaid

The era payout has been set; the first balance is the validator-payout; the second is the remainder from the maximum amount of reward.

Namespace

api.events.staking.EraPaid

Type

type EraPaid = {
  era_index: u32,
  validator_payout: u128,
  remainder: u128
}

Kicked

A nominator has been kicked from a validator.

Namespace

api.events.staking.Kicked

Type

type Kicked = {
  nominator: SeedPrimitivesSignatureAccountId20,
  stash: SeedPrimitivesSignatureAccountId20
}

OldSlashingReportDiscarded

An old slashing report from a prior era was discarded because it could not be processed.

Namespace

api.events.staking.OldSlashingReportDiscarded

Type

type OldSlashingReportDiscarded = {
  session_index: u32
}

PayoutStarted

The stakers' rewards are getting paid.

Namespace

api.events.staking.PayoutStarted

Type

type PayoutStarted = {
  era_index: u32,
  validator_stash: SeedPrimitivesSignatureAccountId20
}

Rewarded

The nominator has been rewarded by this amount.

Namespace

api.events.staking.Rewarded

Type

type Rewarded = {
  stash: SeedPrimitivesSignatureAccountId20,
  amount: u128
}

Slashed

One staker (and potentially its nominators) has been slashed by the given amount.

Namespace

api.events.staking.Slashed

Type

type Slashed = {
  staker: SeedPrimitivesSignatureAccountId20,
  amount: u128
}

StakersElected

A new set of stakers was elected.

Namespace

api.events.staking.StakersElected

Type

type StakersElected = {

}

StakingElectionFailed

The election failed. No new era is planned.

Namespace

api.events.staking.StakingElectionFailed

Type

type StakingElectionFailed = {

}

Unbonded

An account has unbonded this amount.

Namespace

api.events.staking.Unbonded

Type

type Unbonded = {
  stash: SeedPrimitivesSignatureAccountId20,
  amount: u128
}

ValidatorPrefsSet

A validator has set their preferences.

Namespace

api.events.staking.ValidatorPrefsSet

Type

type ValidatorPrefsSet = {
  stash: SeedPrimitivesSignatureAccountId20,
  prefs: PalletStakingValidatorPrefs
}

Withdrawn

An account has called withdraw_unbonded and removed unbonding chunks worth Balance from the unlocking queue.

Namespace

api.events.staking.Withdrawn

Type

type Withdrawn = {
  stash: SeedPrimitivesSignatureAccountId20,
  amount: u128
}

Errors

AlreadyBonded

Stash is already bonded.

Namespace

api.errors.staking.AlreadyBonded

AlreadyClaimed

Rewards for this era have already been claimed for this validator.

Namespace

api.errors.staking.AlreadyClaimed

AlreadyPaired

Controller is already paired.

Namespace

api.errors.staking.AlreadyPaired

BadState

Internal state has become somehow corrupted and the operation cannot continue.

Namespace

api.errors.staking.BadState

BadTarget

A nomination target was supplied that was blocked or otherwise not a validator.

Namespace

api.errors.staking.BadTarget

BoundNotMet

Some bound is not met.

Namespace

api.errors.staking.BoundNotMet

CannotChillOther

The user has enough bond and thus cannot be chilled forcefully by an external person.

Namespace

api.errors.staking.CannotChillOther

CommissionTooLow

Commission is too low. Must be at least MinCommission.

Namespace

api.errors.staking.CommissionTooLow

DuplicateIndex

Duplicate index.

Namespace

api.errors.staking.DuplicateIndex

EmptyTargets

Targets cannot be empty.

Namespace

api.errors.staking.EmptyTargets

FundedTarget

Attempting to target a stash that still has funds.

Namespace

api.errors.staking.FundedTarget

IncorrectHistoryDepth

Incorrect previous history depth input provided.

Namespace

api.errors.staking.IncorrectHistoryDepth

IncorrectSlashingSpans

Incorrect number of slashing spans provided.

Namespace

api.errors.staking.IncorrectSlashingSpans

InsufficientBond

Cannot have a validator or nominator role, with value less than the minimum defined by governance (see MinValidatorBond and MinNominatorBond). If unbonding is the intention, chill first to remove one's role as validator/nominator.

Namespace

api.errors.staking.InsufficientBond

InvalidEraToReward

Invalid era to reward.

Namespace

api.errors.staking.InvalidEraToReward

InvalidNumberOfNominations

Invalid number of nominations.

Namespace

api.errors.staking.InvalidNumberOfNominations

InvalidSlashIndex

Slash record index out of bounds.

Namespace

api.errors.staking.InvalidSlashIndex

NoMoreChunks

Can not schedule more unlock chunks.

Namespace

api.errors.staking.NoMoreChunks

NotController

Not a controller account.

Namespace

api.errors.staking.NotController

NotSortedAndUnique

Items are not sorted and unique.

Namespace

api.errors.staking.NotSortedAndUnique

NotStash

Not a stash account.

Namespace

api.errors.staking.NotStash

NoUnlockChunk

Can not rebond without unlocking chunks.

Namespace

api.errors.staking.NoUnlockChunk

TooManyNominators

There are too many nominators in the system. Governance needs to adjust the staking settings to keep things safe for the runtime.

Namespace

api.errors.staking.TooManyNominators

TooManyTargets

Too many nomination targets supplied.

Namespace

api.errors.staking.TooManyTargets

TooManyValidators

There are too many validators in the system. Governance needs to adjust the staking settings to keep things safe for the runtime.

Namespace

api.errors.staking.TooManyValidators

Constants

bondingDuration

Number of eras that staked funds must remain bonded for.

Namespace

api.consts.staking.bondingDuration

Type

type bondingDuration = u32

historyDepth

Number of eras to keep in history.

Following information is kept for eras in [current_era - HistoryDepth, current_era]: ErasStakers, ErasStakersClipped, ErasValidatorPrefs, ErasValidatorReward, ErasRewardPoints, ErasTotalStake, ErasStartSessionIndex, StakingLedger.claimed_rewards.

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

If migrating an existing pallet from storage value to config value, this should be set to same value or greater as in storage.

Note: HistoryDepth is used as the upper bound for the BoundedVec item StakingLedger.claimed_rewards. Setting this value lower than the existing value can lead to inconsistencies in the StakingLedger and will need to be handled properly in a migration. The test reducing_history_depth_abrupt shows this effect.

Namespace

api.consts.staking.historyDepth

Type

type historyDepth = u32

maxNominations

Maximum number of nominations per nominator.

Namespace

api.consts.staking.maxNominations

Type

type maxNominations = u32

maxNominatorRewardedPerValidator

The maximum number of nominators rewarded for each validator.

For each validator only the $MaxNominatorRewardedPerValidator biggest stakers can claim their reward. This used to limit the i/o cost for the nominator payout.

Namespace

api.consts.staking.maxNominatorRewardedPerValidator

Type

type maxNominatorRewardedPerValidator = u32

maxUnlockingChunks

The maximum number of unlocking chunks a [StakingLedger] can have. Effectively determines how many unique eras a staker may be unbonding in.

Note: MaxUnlockingChunks is used as the upper bound for the BoundedVec item StakingLedger.unlocking. Setting this value lower than the existing value can lead to inconsistencies in the StakingLedger and will need to be handled properly in a runtime migration. The test reducing_max_unlocking_chunks_abrupt shows this effect.

Namespace

api.consts.staking.maxUnlockingChunks

Type

type maxUnlockingChunks = u32

sessionsPerEra

Number of sessions per era.

Namespace

api.consts.staking.sessionsPerEra

Type

type sessionsPerEra = u32

slashDeferDuration

Number of eras that slashes are deferred by, after computation.

This should be less than the bonding duration. Set to 0 if slashes should be applied immediately, without opportunity for intervention.

Namespace

api.consts.staking.slashDeferDuration

Type

type slashDeferDuration = u32

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Last updated 4 months ago