Staking¶

Calls¶

add_permissioned_validator¶

Scale up the ideal number of validators by a factor upto maximum of ElectionProviderBase::MaxWinners.

The dispatch origin must be Root.

## Complexity Same as [Self::set_validator_count].

Attributes¶

Name	Type
identity	`IdentityId`
intended_count	`Option<u32>`

Python¶

call = substrate.compose_call(
    'Staking', 'add_permissioned_validator', {
    'identity': '[u8; 32]',
    'intended_count': (None, 'u32'),
}
)

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. ## Complexity - Independent of the arguments. Moderate complexity. - O(1). - Three extra DB entries.

NOTE: Two of the storage writes (Self::bonded, Self::payee) are never cleaned unless the origin falls below existential deposit and gets removed as dust.

Attributes¶

Name	Type
controller	`AccountIdLookupOf<T>`
value	`BalanceOf<T>`
payee	`RewardDestination<T::AccountId>`

Python¶

call = substrate.compose_call(
    'Staking', 'bond', {
    'controller': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': 'u32',
        'Raw': 'Bytes',
    },
    'payee': {
        'Account': 'AccountId',
        'Controller': None,
        'Staked': None,
        'Stash': None,
    },
    'value': 'u128',
}
)

bond_extra¶

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.

## Complexity - Independent of the arguments. Insignificant complexity. - O(1).

Attributes¶

Name	Type
max_additional	`BalanceOf<T>`

Python¶

call = substrate.compose_call(
    'Staking', 'bond_extra', {'max_additional': 'u128'}
)

cancel_deferred_slash¶

Cancel enactment of a deferred slash.

Can be called by the T::AdminOrigin.

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

Attributes¶

Name	Type
era	`EraIndex`
slash_indices	`Vec<u32>`

Python¶

call = substrate.compose_call(
    'Staking', 'cancel_deferred_slash', {
    'era': 'u32',
    'slash_indices': ['u32'],
}
)

change_slashing_allowed_for¶

Switch slashing status on the basis of given SlashingSwitch. Can only be called by root.

# Arguments * origin - AccountId of root. * slashing_switch - Switch used to set the targets for s

Attributes¶

Name	Type
slashing_switch	`SlashingSwitch`

Python¶

call = substrate.compose_call(
    'Staking', 'change_slashing_allowed_for', {
    'slashing_switch': (
        'Validator',
        'ValidatorAndNominator',
        'None',
    ),
}
)

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.

## Complexity - Independent of the arguments. Insignificant complexity. - Contains one read. - Writes are limited to the origin account key.

Attributes¶

No attributes

Python¶

call = substrate.compose_call(
    'Staking', 'chill', {}
)

chill_from_governance¶

GC forcefully chills a validator. Effects will be felt at the beginning of the next era. And, it can be only called when [EraElectionStatus] is Closed.

# Arguments * origin which must be a GC. * identity must be permissioned to run operator/validator nodes. * stash_keys contains the secondary keys of the permissioned identity

# Errors * BadOrigin The origin was not a GC member. * CallNotAllowed The call is not allowed at the given time due to restrictions of election period. * NotExists Permissioned validator doesn't exist. * NotStash Not a stash account for the permissioned i

Attributes¶

Name	Type
identity	`IdentityId`
stash_keys	`Vec<T::AccountId>`

Python¶

call = substrate.compose_call(
    'Staking', 'chill_from_governance', {
    'identity': '[u8; 32]',
    'stash_keys': ['AccountId'],
}
)

force_new_era¶

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.

## Complexity - No arguments. - Weight: O(1)

Attributes¶

No attributes

Python¶

call = substrate.compose_call(
    'Staking', 'force_new_era', {}
)

force_new_era_always¶

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

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.

Attributes¶

No attributes

Python¶

call = substrate.compose_call(
    'Staking', 'force_new_era_always', {}
)

force_no_eras¶

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.

## Complexity - No arguments. - Weight: O(1)

Attributes¶

No attributes

Python¶

call = substrate.compose_call(
    'Staking', 'force_no_eras', {}
)

force_unstake¶

Force a current staker to become completely unstaked, immediately.

The dispatch origin must be Root.

Attributes¶

Name	Type
stash	`T::AccountId`
num_slashing_spans	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'force_unstake', {
    'num_slashing_spans': 'u32',
    'stash': 'AccountId',
}
)

increase_validator_count¶

Increments the ideal number of validators upto maximum of ElectionProviderBase::MaxWinners.

The dispatch origin must be Root.

## Complexity Same as [Self::set_validator_count].

Attributes¶

Name	Type
additional	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'increase_validator_count', {'additional': 'u32'}
)

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.

## Complexity - The transaction's complexity is proportional to the size of targets (N) which is capped at CompactAssignments::LIMIT (T::MaxNominations). - Both the reads and writes follow a similar pattern.

Attributes¶

Name	Type
targets	`Vec<AccountIdLookupOf<T>>`

Python¶

call = substrate.compose_call(
    'Staking', 'nominate', {
    'targets': [
        {
            'Address20': '[u8; 20]',
            'Address32': '[u8; 32]',
            'Id': 'AccountId',
            'Index': 'u32',
            'Raw': 'Bytes',
        },
    ],
}
)

payout_stakers¶

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.

## Complexity - At most O(MaxNominatorRewardedPerValidator).

Attributes¶

Name	Type
validator_stash	`T::AccountId`
era	`EraIndex`

Python¶

call = substrate.compose_call(
    'Staking', 'payout_stakers', {
    'era': 'u32',
    'validator_stash': 'AccountId',
}
)

payout_stakers_by_system¶

Attributes¶

Name	Type
validator_stash	`T::AccountId`
era	`EraIndex`

Python¶

call = substrate.compose_call(
    'Staking', 'payout_stakers_by_system', {
    'era': 'u32',
    'validator_stash': 'AccountId',
}
)

reap_stash¶

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.
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.

Attributes¶

Name	Type
stash	`T::AccountId`
num_slashing_spans	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'reap_stash', {
    'num_slashing_spans': 'u32',
    'stash': 'AccountId',
}
)

rebond¶

Rebond a portion of the stash scheduled to be unlocked.

The dispatch origin must be signed by the controller.

## Complexity - Time complexity: O(L), where L is unlocking chunks - Bounded by MaxUnlockingChunks.

Attributes¶

Name	Type
value	`BalanceOf<T>`

Python¶

call = substrate.compose_call(
    'Staking', 'rebond', {'value': 'u128'}
)

remove_permissioned_validator¶

Remove an identity from the pool of (wannabe) validator identities. Effects are known in the next session. Staking module checks PermissionedIdentity to ensure validators have completed KYB compliance

# Arguments * origin Required origin for removing a potential validator. * identity Validator's IdentityId.

Attributes¶

Name	Type
identity	`IdentityId`

Python¶

call = substrate.compose_call(
    'Staking', 'remove_permissioned_validator', {'identity': '[u8; 32]'}
)

scale_validator_count¶

Scale up the ideal number of validators by a factor upto maximum of ElectionProviderBase::MaxWinners.

The dispatch origin must be Root.

## Complexity Same as [Self::set_validator_count].

Attributes¶

Name	Type
factor	`Percent`

Python¶

call = substrate.compose_call(
    'Staking', 'scale_validator_count', {'factor': 'u8'}
)

set_commission_cap¶

Changes commission rate which applies to all validators. Only Governance committee is allowed to change this value.

# Arguments * new_cap the new commission cap.

Attributes¶

Name	Type
new_cap	`Perbill`

Python¶

call = substrate.compose_call(
    'Staking', 'set_commission_cap', {'new_cap': 'u32'}
)

set_controller¶

(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.

## Complexity O(1) - Independent of the arguments. Insignificant complexity. - Contains a limited number of reads. - Writes are limited to the origin account key.

Attributes¶

Name	Type
controller	`AccountIdLookupOf<T>`

Python¶

call = substrate.compose_call(
    'Staking', 'set_controller', {
    'controller': {
        'Address20': '[u8; 20]',
        'Address32': '[u8; 32]',
        'Id': 'AccountId',
        'Index': 'u32',
        'Raw': 'Bytes',
    },
}
)

set_history_depth¶

Rebond a portion of the stash scheduled to be unlocked.

The dispatch origin must be signed by the controller.

## Complexity - Time complexity: O(L), where L is unlocking chunks - Bounded by MaxUnlockingChunks.

Attributes¶

Name	Type
new_history_depth	`EraIndex`
era_items_deleted	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'set_history_depth', {
    'era_items_deleted': 'u32',
    'new_history_depth': 'u32',
}
)

set_invulnerables¶

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

The dispatch origin must be Root.

Attributes¶

Name	Type
invulnerables	`Vec<T::AccountId>`

Python¶

call = substrate.compose_call(
    'Staking', 'set_invulnerables', {'invulnerables': ['AccountId']}
)

set_min_bond_threshold¶

Changes commission rate which applies to all validators. Only Governance committee is allowed to change this value.

# Arguments * new_cap the new commission cap.

Attributes¶

Name	Type
new_value	`BalanceOf<T>`

Python¶

call = substrate.compose_call(
    'Staking', 'set_min_bond_threshold', {'new_value': 'u128'}
)

set_payee¶

(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.

## Complexity - O(1) - Independent of the arguments. Insignificant complexity. - Contains a limited number of reads. - Writes are limited to the origin account key.

Attributes¶

Name	Type
payee	`RewardDestination<T::AccountId>`

Python¶

call = substrate.compose_call(
    'Staking', 'set_payee', {
    'payee': {
        'Account': 'AccountId',
        'Controller': None,
        'Staked': None,
        'Stash': None,
    },
}
)

set_validator_count¶

Sets the ideal number of validators.

The dispatch origin must be Root.

## Complexity O(1)

Attributes¶

Name	Type
new	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'set_validator_count', {'new': 'u32'}
)

submit_election_solution¶

Submit an election result to the chain. If the solution:

is valid.
has a better score than a potentially existing solution on chain.

then, it will be put on chain.

A solution consists of two pieces of data:

winners: a flat vector of all the winners of the round.
assignments: the compact version of an assignment vector that encodes the edge weights.

Both of which may be computed using phragmen, or any other algorithm.

Additionally, the submitter must provide:

The score that they claim their solution has.

Both validators and nominators will be represented by indices in the solution. The indices should respect the corresponding types ([ValidatorIndex] and [NominatorIndex]). Moreover, they should be valid when used to index into [SnapshotValidators] and [SnapshotNominators]. Any invalid index will cause the solution to be rejected. These two storage items are set during the election window and may be used to determine the indices.

A solution is valid if:

It is submitted when [EraElectionStatus] is Open.
Its claimed score is equal to the score computed on-chain.
Presents the correct number of winners.
All indexes must be value according to the snapshot vectors. All edge values must also be correct and should not overflow the granularity of the ratio type (i.e. 256 or billion).
For each edge, all targets are actually nominated by the voter.
Has correct self-votes.

A solutions score is consisted of 3 parameters:

min { support.total } for each support of a winner. This value should be maximized.
sum { support.total } for each support of a winner. This value should be minimized.
sum { support.total^2 } for each support of a winner. This value should be minimized (to ensure less variance)

# <weight> The transaction is assumed to be the longest path, a better solution. - Initial solution is almost the same. - Worse solution is retraced in pre-dispatch-checks which sets its own weight. # </weight>

Attributes¶

Name	Type
winners	`Vec<ValidatorIndex>`
compact	`CompactAssignments`
score	`ElectionScore`
era	`EraIndex`
size	`ElectionSize`

Python¶

call = substrate.compose_call(
    'Staking', 'submit_election_solution', {
    'compact': {
        'votes1': [('u32', 'u16')],
        'votes10': [
            (
                'u32',
                "[('u16', 'u16'); 9]",
                'u16',
            ),
        ],
        'votes11': [
            (
                'u32',
                "[('u16', 'u16'); 10]",
                'u16',
            ),
        ],
        'votes12': [
            (
                'u32',
                "[('u16', 'u16'); 11]",
                'u16',
            ),
        ],
        'votes13': [
            (
                'u32',
                "[('u16', 'u16'); 12]",
                'u16',
            ),
        ],
        'votes14': [
            (
                'u32',
                "[('u16', 'u16'); 13]",
                'u16',
            ),
        ],
        'votes15': [
            (
                'u32',
                "[('u16', 'u16'); 14]",
                'u16',
            ),
        ],
        'votes16': [
            (
                'u32',
                "[('u16', 'u16'); 15]",
                'u16',
            ),
        ],
        'votes2': [
            ('u32', ('u16', 'u16'), 'u16'),
        ],
        'votes3': [
            (
                'u32',
                "[('u16', 'u16'); 2]",
                'u16',
            ),
        ],
        'votes4': [
            (
                'u32',
                "[('u16', 'u16'); 3]",
                'u16',
            ),
        ],
        'votes5': [
            (
                'u32',
                "[('u16', 'u16'); 4]",
                'u16',
            ),
        ],
        'votes6': [
            (
                'u32',
                "[('u16', 'u16'); 5]",
                'u16',
            ),
        ],
        'votes7': [
            (
                'u32',
                "[('u16', 'u16'); 6]",
                'u16',
            ),
        ],
        'votes8': [
            (
                'u32',
                "[('u16', 'u16'); 7]",
                'u16',
            ),
        ],
        'votes9': [
            (
                'u32',
                "[('u16', 'u16'); 8]",
                'u16',
            ),
        ],
    },
    'era': 'u32',
    'score': {
        'minimal_stake': 'u128',
        'sum_stake': 'u128',
        'sum_stake_squared': 'u128',
    },
    'size': {
        'nominators': 'u32',
        'validators': 'u16',
    },
    'winners': ['u16'],
}
)

submit_election_solution_unsigned¶

Unsigned version of submit_election_solution.

Note that this must pass the [ValidateUnsigned] check which only allows transactions from the local node to be included. In other words, only the block author can include a transaction in the block.

# <weight> See [submit_election_solution]. # </weight>

Attributes¶

Name	Type
winners	`Vec<ValidatorIndex>`
compact	`CompactAssignments`
score	`ElectionScore`
era	`EraIndex`
size	`ElectionSize`

Python¶

call = substrate.compose_call(
    'Staking', 'submit_election_solution_unsigned', {
    'compact': {
        'votes1': [('u32', 'u16')],
        'votes10': [
            (
                'u32',
                "[('u16', 'u16'); 9]",
                'u16',
            ),
        ],
        'votes11': [
            (
                'u32',
                "[('u16', 'u16'); 10]",
                'u16',
            ),
        ],
        'votes12': [
            (
                'u32',
                "[('u16', 'u16'); 11]",
                'u16',
            ),
        ],
        'votes13': [
            (
                'u32',
                "[('u16', 'u16'); 12]",
                'u16',
            ),
        ],
        'votes14': [
            (
                'u32',
                "[('u16', 'u16'); 13]",
                'u16',
            ),
        ],
        'votes15': [
            (
                'u32',
                "[('u16', 'u16'); 14]",
                'u16',
            ),
        ],
        'votes16': [
            (
                'u32',
                "[('u16', 'u16'); 15]",
                'u16',
            ),
        ],
        'votes2': [
            ('u32', ('u16', 'u16'), 'u16'),
        ],
        'votes3': [
            (
                'u32',
                "[('u16', 'u16'); 2]",
                'u16',
            ),
        ],
        'votes4': [
            (
                'u32',
                "[('u16', 'u16'); 3]",
                'u16',
            ),
        ],
        'votes5': [
            (
                'u32',
                "[('u16', 'u16'); 4]",
                'u16',
            ),
        ],
        'votes6': [
            (
                'u32',
                "[('u16', 'u16'); 5]",
                'u16',
            ),
        ],
        'votes7': [
            (
                'u32',
                "[('u16', 'u16'); 6]",
                'u16',
            ),
        ],
        'votes8': [
            (
                'u32',
                "[('u16', 'u16'); 7]",
                'u16',
            ),
        ],
        'votes9': [
            (
                'u32',
                "[('u16', 'u16'); 8]",
                'u16',
            ),
        ],
    },
    'era': 'u32',
    'score': {
        'minimal_stake': 'u128',
        'sum_stake': 'u128',
        'sum_stake_squared': 'u128',
    },
    'size': {
        'nominators': 'u32',
        'validators': 'u16',
    },
    'winners': ['u16'],
}
)

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. If there are no unlocking chunks slots available [Call::withdraw_unbonded] is called 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.

Attributes¶

Name	Type
value	`BalanceOf<T>`

Python¶

call = substrate.compose_call(
    'Staking', 'unbond', {'value': 'u128'}
)

update_permissioned_validator_intended_count¶

Update the intended validator count for a given DID.

# Arguments * origin which must be the required origin for adding a potential validator. * identity to add as a validator. * new_intended_count New value of intended co

Attributes¶

Name	Type
identity	`IdentityId`
new_intended_count	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'update_permissioned_validator_intended_count', {
    'identity': '[u8; 32]',
    'new_intended_count': 'u32',
}
)

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.

Attributes¶

Name	Type
prefs	`ValidatorPrefs`

Python¶

call = substrate.compose_call(
    'Staking', 'validate', {
    'prefs': {
        'blocked': 'bool',
        'commission': 'u32',
    },
}
)

validate_cdd_expiry_nominators¶

Validate the nominators CDD expiry time.

If an account from a given set of address is nominating then check the CDD expiry time of it and if it is expired then the account should be unbonded and removed from the nominating process.

Attributes¶

Name	Type
targets	`Vec<T::AccountId>`

Python¶

call = substrate.compose_call(
    'Staking', 'validate_cdd_expiry_nominators', {'targets': ['AccountId']}
)

withdraw_unbonded¶

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.

Attributes¶

Name	Type
num_slashing_spans	`u32`

Python¶

call = substrate.compose_call(
    'Staking', 'withdraw_unbonded', {'num_slashing_spans': 'u32'}
)

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.

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`T::AccountId`	`AccountId`
None	`BalanceOf<T>`	`u128`

CommissionCapUpdated¶

When commission cap get updated. (old value, new value)

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`Perbill`	`u32`
None	`Perbill`	`u32`

EraPayout¶

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

Attributes¶

Name	Type	Composition
None	`EraIndex`	`u32`
None	`BalanceOf<T>`	`u128`
None	`BalanceOf<T>`	`u128`

InvalidatedNominators¶

Remove the nominators from the valid nominators when there CDD expired. Caller, Stash accountId of nominators

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`T::AccountId`	`AccountId`
None	`Vec<T::AccountId>`	`['AccountId']`

MinimumBondThresholdUpdated¶

Min bond threshold was updated (new value).

Attributes¶

Name	Type	Composition
None	`Option<IdentityId>`	`(None, '[u8; 32]')`
None	`BalanceOf<T>`	`u128`

Nominated¶

User has updated their nominations

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`T::AccountId`	`AccountId`
None	`Vec<T::AccountId>`	`['AccountId']`

OldSlashingReportDiscarded¶

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

Attributes¶

Name	Type	Composition
None	`SessionIndex`	`u32`

PermissionedIdentityAdded¶

An DID has issued a candidacy. See the transaction for who. GC identity , Validator's identity.

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`IdentityId`	`[u8; 32]`

PermissionedIdentityRemoved¶

The given member was removed. See the transaction for who. GC identity , Validator's identity.

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`IdentityId`	`[u8; 32]`

Reward¶

The nominator has been rewarded by this amount.

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`T::AccountId`	`AccountId`
None	`BalanceOf<T>`	`u128`

RewardPaymentSchedulingInterrupted¶

When scheduling of reward payments get interrupted.

Attributes¶

Name	Type	Composition
None	`T::AccountId`	`AccountId`
None	`EraIndex`	`u32`
None	`DispatchError`	`{'Other': None, 'CannotLookup': None, 'BadOrigin': None, 'Module': {'index': 'u8', 'error': '[u8; 4]'}, 'ConsumerRemaining': None, 'NoProviders': None, 'TooManyConsumers': None, 'Token': ('NoFunds', 'WouldDie', 'BelowMinimum', 'CannotCreate', 'UnknownAsset', 'Frozen', 'Unsupported'), 'Arithmetic': ('Underflow', 'Overflow', 'DivisionByZero'), 'Transactional': ('LimitReached', 'NoLayer'), 'Exhausted': None, 'Corruption': None, 'Unavailable': None}`

Slash¶

A staker (validator or nominator) has been slashed by the given amount.

Attributes¶

Name	Type	Composition
None	`T::AccountId`	`AccountId`
None	`BalanceOf<T>`	`u128`

SlashingAllowedForChanged¶

Update for whom balance get slashed.

Attributes¶

Name	Type	Composition
None	`SlashingSwitch`	`('Validator', 'ValidatorAndNominator', 'None')`

SolutionStored¶

A new solution for the upcoming election has been stored.

Attributes¶

Name	Type	Composition
None	`ElectionCompute`	`('OnChain', 'Signed', 'Unsigned')`

StakingElection¶

A new set of stakers was elected.

Attributes¶

Name	Type	Composition
None	`ElectionCompute`	`('OnChain', 'Signed', 'Unsigned')`

Unbonded¶

An account has unbonded this amount.

Attributes¶

Name	Type	Composition
None	`IdentityId`	`[u8; 32]`
None	`T::AccountId`	`AccountId`
None	`BalanceOf<T>`	`u128`

Withdrawn¶

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

Attributes¶

Name	Type	Composition
None	`T::AccountId`	`AccountId`
None	`BalanceOf<T>`	`u128`

Storage functions¶

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].

Python¶

result = substrate.query(
    'Staking', 'ActiveEra', []
)

Return value¶

{'index': 'u32', 'start': (None, 'u64')}

Bonded¶

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

TWOX-NOTE: SAFE since AccountId is a secure hash.

Python¶

result = substrate.query(
    'Staking', 'Bonded', ['AccountId']
)

Return value¶

'AccountId'

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]

Python¶

result = substrate.query(
    'Staking', 'BondedEras', []
)

Return value¶

[('u32', 'u32')]

CanceledSlashPayout¶

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

Python¶

result = substrate.query(
    'Staking', 'CanceledSlashPayout', []
)

Return value¶

'u128'

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.

Python¶

result = substrate.query(
    'Staking', 'CurrentEra', []
)

Return value¶

'u32'

EarliestUnappliedSlash¶

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

Python¶

result = substrate.query(
    'Staking', 'EarliestUnappliedSlash', []
)

Return value¶

'u32'

EraElectionStatus¶

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

Python¶

result = substrate.query(
    'Staking', 'EraElectionStatus', []
)

Return value¶

{'Closed': None, 'Open': 'u32'}

ErasRewardPoints¶

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

Python¶

result = substrate.query(
    'Staking', 'ErasRewardPoints', ['u32']
)

Return value¶

{'individual': 'scale_info::591', 'total': 'u32'}

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.

Python¶

result = substrate.query(
    'Staking', 'ErasStakers', ['u32', 'AccountId']
)

Return value¶

{'others': [{'value': 'u128', 'who': 'AccountId'}], 'own': 'u128', 'total': 'u128'}

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.

Python¶

result = substrate.query(
    'Staking', 'ErasStakersClipped', ['u32', 'AccountId']
)

Return value¶

{'others': [{'value': 'u128', 'who': 'AccountId'}], 'own': 'u128', 'total': 'u128'}

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].

Python¶

result = substrate.query(
    'Staking', 'ErasStartSessionIndex', ['u32']
)

Return value¶

'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.

Python¶

result = substrate.query(
    'Staking', 'ErasTotalStake', ['u32']
)

Return value¶

'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.

Python¶

result = substrate.query(
    'Staking', 'ErasValidatorPrefs', ['u32', 'AccountId']
)

Return value¶

{'blocked': 'bool', 'commission': 'u32'}

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.

Python¶

result = substrate.query(
    'Staking', 'ErasValidatorReward', ['u32']
)

Return value¶

'u128'

ForceEra¶

Mode of era forcing.

Python¶

result = substrate.query(
    'Staking', 'ForceEra', []
)

Return value¶

('NotForcing', 'ForceNew', 'ForceNone', 'ForceAlways')

HistoryDepth¶

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.

Python¶

result = substrate.query(
    'Staking', 'HistoryDepth', []
)

Return value¶

'u32'

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.

Python¶

result = substrate.query(
    'Staking', 'Invulnerables', []
)

Return value¶

['AccountId']

IsCurrentSessionFinal¶

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

Python¶

result = substrate.query(
    'Staking', 'IsCurrentSessionFinal', []
)

Return value¶

'bool'

Ledger¶

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

Python¶

result = substrate.query(
    'Staking', 'Ledger', ['AccountId']
)

Return value¶

{
    'active': 'u128',
    'claimed_rewards': ['u32'],
    'stash': 'AccountId',
    'total': 'u128',
    'unlocking': [{'era': 'u32', 'value': 'u128'}],
}

MinimumBondThreshold¶

The minimum amount with which a validator can bond.

Python¶

result = substrate.query(
    'Staking', 'MinimumBondThreshold', []
)

Return value¶

'u128'

MinimumValidatorCount¶

Minimum number of staking participants before emergency conditions are imposed.

Python¶

result = substrate.query(
    'Staking', 'MinimumValidatorCount', []
)

Return value¶

'u32'

NominatorSlashInEra¶

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

Python¶

result = substrate.query(
    'Staking', 'NominatorSlashInEra', ['u32', 'AccountId']
)

Return value¶

'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.

TWOX-NOTE: SAFE since AccountId is a secure hash.

Python¶

result = substrate.query(
    'Staking', 'Nominators', ['AccountId']
)

Return value¶

{'submitted_in': 'u32', 'suppressed': 'bool', 'targets': ['AccountId']}

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.

Python¶

result = substrate.query(
    'Staking', 'OffendingValidators', []
)

Return value¶

[('u32', 'bool')]

Payee¶

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

TWOX-NOTE: SAFE since AccountId is a secure hash.

Python¶

result = substrate.query(
    'Staking', 'Payee', ['AccountId']
)

Return value¶

{'Account': 'AccountId', 'Controller': None, 'Staked': None, 'Stash': None}

PermissionedIdentity¶

Entities that are allowed to run operator/validator nodes.

Python¶

result = substrate.query(
    'Staking', 'PermissionedIdentity', ['[u8; 32]']
)

Return value¶

{'intended_count': 'u32', 'running_count': 'u32'}

PolymeshStorageVersion¶

Python¶

result = substrate.query(
    'Staking', 'PolymeshStorageVersion', []
)

Return value¶

'u8'

QueuedElected¶

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.

Python¶

result = substrate.query(
    'Staking', 'QueuedElected', []
)

Return value¶

{
    'compute': ('OnChain', 'Signed', 'Unsigned'),
    'elected_stashes': ['AccountId'],
    'exposures': [
        (
            'AccountId',
            {'others': ['scale_info::121'], 'own': 'u128', 'total': 'u128'},
        ),
    ],
}

QueuedScore¶

The score of the current [QueuedElected].

Python¶

result = substrate.query(
    'Staking', 'QueuedScore', []
)

Return value¶

{'minimal_stake': 'u128', 'sum_stake': 'u128', 'sum_stake_squared': 'u128'}

SlashRewardFraction¶

The percentage of the slash that is distributed to reporters.

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

Python¶

result = substrate.query(
    'Staking', 'SlashRewardFraction', []
)

Return value¶

'u32'

SlashingAllowedFor¶

Python¶

result = substrate.query(
    'Staking', 'SlashingAllowedFor', []
)

Return value¶

('Validator', 'ValidatorAndNominator', 'None')

SlashingSpans¶

Slashing spans for stash accounts.

Python¶

result = substrate.query(
    'Staking', 'SlashingSpans', ['AccountId']
)

Return value¶

{
    'last_nonzero_slash': 'u32',
    'last_start': 'u32',
    'prior': ['u32'],
    'span_index': 'u32',
}

SnapshotNominators¶

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

Python¶

result = substrate.query(
    'Staking', 'SnapshotNominators', []
)

Return value¶

['AccountId']

SnapshotValidators¶

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

Python¶

result = substrate.query(
    'Staking', 'SnapshotValidators', []
)

Return value¶

['AccountId']

SpanSlash¶

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

Python¶

result = substrate.query(
    'Staking', 'SpanSlash', [('AccountId', 'u32')]
)

Return value¶

{'paid_out': 'u128', 'slashed': 'u128'}

UnappliedSlashes¶

All unapplied slashes that are queued for later.

Python¶

result = substrate.query(
    'Staking', 'UnappliedSlashes', ['u32']
)

Return value¶

[
    {
        'others': [('AccountId', 'u128')],
        'own': 'u128',
        'payout': 'u128',
        'reporters': ['AccountId'],
        'validator': 'AccountId',
    },
]

ValidatorCommissionCap¶

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

Python¶

result = substrate.query(
    'Staking', 'ValidatorCommissionCap', []
)

Return value¶

'u32'

ValidatorCount¶

The ideal number of active validators.

Python¶

result = substrate.query(
    'Staking', 'ValidatorCount', []
)

Return value¶

'u32'

ValidatorSlashInEra¶

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

Python¶

result = substrate.query(
    'Staking', 'ValidatorSlashInEra', ['u32', 'AccountId']
)

Return value¶

('u32', 'u128')

Validators¶

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

TWOX-NOTE: SAFE since AccountId is a secure hash.

Python¶

result = substrate.query(
    'Staking', 'Validators', ['AccountId']
)

Return value¶

{'blocked': 'bool', 'commission': 'u32'}

Constants¶

BondingDuration¶

Number of eras that staked funds must remain bonded for.]

Value¶

Python¶

constant = substrate.get_constant('Staking', 'BondingDuration')

ElectionLookahead¶

The number of blocks before the end of the era from which election submissions are allowed.

Setting this to zero will disable the offchain compute and only on-chain seq-phragmen will be used.

This is bounded by being within the last session. Hence, setting it to a value more than the length of a session will be pointless.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'ElectionLookahead')

FixedYearlyReward¶

Yearly total reward amount that gets distributed when fixed rewards kicks in.

Value¶

140000000000000

Python¶

constant = substrate.get_constant('Staking', 'FixedYearlyReward')

MaxIterations¶

Maximum number of balancing iterations to run in the offchain submission.

If set to 0, balance_solution will not be executed at all.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MaxIterations')

MaxNominations¶

Maximum number of nominations per nominator.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MaxNominations')

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.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MaxNominatorRewardedPerValidator')

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.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MaxUnlockingChunks')

MaxValidatorPerIdentity¶

Maximum amount of validators that can run by an identity. It will be MaxValidatorPerIdentity * Self::validator_count().

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MaxValidatorPerIdentity')

MaxVariableInflationTotalIssuance¶

Maximum amount of total issuance after which fixed rewards kicks in.

Value¶

1000000000000000

Python¶

constant = substrate.get_constant('Staking', 'MaxVariableInflationTotalIssuance')

MinSolutionScoreBump¶

The threshold of improvement that should be provided for a new solution to be accepted.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MinSolutionScoreBump')

MinimumBond¶

Minimum bond amount.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'MinimumBond')

SessionsPerEra¶

Number of sessions per era.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'SessionsPerEra')

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.

Value¶

Python¶

constant = substrate.get_constant('Staking', 'SlashDeferDuration')

Errors¶

AlreadyBonded¶

Stash is already bonded.

AlreadyClaimed¶

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

AlreadyExists¶

Permissioned validator already exists.

AlreadyPaired¶

Controller is already paired.

BadState¶

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

BadTarget¶

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

BondTooSmall¶

When the amount to be bonded is less than MinimumBond

BoundNotMet¶

Some bound is not met.

CallNotAllowed¶

The call is not allowed at the given time due to restrictions of election period.

EmptyTargets¶

Targets cannot be empty.

FundedTarget¶

Attempting to target a stash that still has funds.

HitIntendedValidatorCount¶

Running validator count hit the intended count.

IncorrectSlashingSpans¶

Incorrect number of slashing spans provided.

InsufficientValue¶

Can not bond with value less than minimum balance.

IntendedCountIsExceedingConsensusLimit¶

When the intended number of validators to run is >= 2/3 of validator_count.

InvalidEraToReward¶

Invalid era to reward.

InvalidSlashIndex¶

Slash record index out of bounds.

InvalidValidatorCommission¶

Validator prefs are not in valid range.

InvalidValidatorIdentity¶

Given potential validator identity is invalid.

InvalidValidatorUnbondAmount¶

Validator should have minimum 50k POLYX bonded.

NoChange¶

Updates with same value.

NoMoreChunks¶

Can not schedule more unlock chunks.

NoUnlockChunk¶

Can not rebond without unlocking chunks.

NotController¶

Not a controller account.

NotExists¶

Permissioned validator not exists.

NotSortedAndUnique¶

Items are not sorted and unique.

NotStash¶

Not a stash account.

OffchainElectionBogusCompact¶

Error while building the assignment type from the compact. This can happen if an index is invalid, or if the weights overflow.

OffchainElectionBogusEdge¶

The submitted result has unknown edges that are not among the presented winners.

OffchainElectionBogusElectionSize¶

The election size is invalid.

OffchainElectionBogusNomination¶

One of the submitted nominators has an edge to which they have not voted on chain.

OffchainElectionBogusNominator¶

One of the submitted nominators is not an active nominator on chain.

OffchainElectionBogusScore¶

The claimed score does not match with the one computed from the data.

OffchainElectionBogusSelfVote¶

A self vote must only be originated from a validator to ONLY themselves.

OffchainElectionBogusWinner¶

One of the submitted winners is not an active candidate on chain (index is out of range in snapshot).

OffchainElectionBogusWinnerCount¶

Incorrect number of winners were presented.

OffchainElectionEarlySubmission¶

The submitted result is received out of the open window.

OffchainElectionSlashedNomination¶

One of the submitted nominators has an edge which is submitted before the last non-zero slash of the target.

OffchainElectionWeakSubmission¶

The submitted result is not as good as the one stored on chain.

SnapshotUnavailable¶

The snapshot data of the current window is missing.

StashIdentityDoesNotExist¶

Validator or nominator stash identity does not exist.

StashIdentityNotCDDed¶

Nominator stash was not CDDed.

StashIdentityNotPermissioned¶

Validator stash identity was not permissioned.

TooManyNominators¶

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

TooManyTargets¶

Too many nomination targets supplied.