Scheduler¶

Calls¶

cancel¶

Cancel an anonymously scheduled task.

Attributes¶

Name	Type
when	`T::BlockNumber`
index	`u32`

Python¶

call = substrate.compose_call(
    'Scheduler', 'cancel', {'index': 'u32', 'when': 'u32'}
)

cancel_named¶

Cancel a named scheduled task.

Attributes¶

Name	Type
id	`Vec<u8>`

Python¶

call = substrate.compose_call(
    'Scheduler', 'cancel_named', {'id': 'Bytes'}
)

schedule¶

Anonymously schedule a task.

Attributes¶

Name	Type
when	`T::BlockNumber`
maybe_periodic	`Option<schedule::Period<T::BlockNumber>>`
priority	`schedule::Priority`
call	`Box<CallOrHashOf<T>>`

Python¶

call = substrate.compose_call(
    'Scheduler', 'schedule', {
    'call': {
        'Hash': '[u8; 32]',
        'Value': 'Call',
    },
    'maybe_periodic': (
        None,
        ('u32', 'u32'),
    ),
    'priority': 'u8',
    'when': 'u32',
}
)

schedule_after¶

Anonymously schedule a task after a delay.

# <weight> Same as [schedule]. # </weight>

Attributes¶

Name	Type
after	`T::BlockNumber`
maybe_periodic	`Option<schedule::Period<T::BlockNumber>>`
priority	`schedule::Priority`
call	`Box<CallOrHashOf<T>>`

Python¶

call = substrate.compose_call(
    'Scheduler', 'schedule_after', {
    'after': 'u32',
    'call': {
        'Hash': '[u8; 32]',
        'Value': 'Call',
    },
    'maybe_periodic': (
        None,
        ('u32', 'u32'),
    ),
    'priority': 'u8',
}
)

schedule_named¶

Schedule a named task.

Attributes¶

Name	Type
id	`Vec<u8>`
when	`T::BlockNumber`
maybe_periodic	`Option<schedule::Period<T::BlockNumber>>`
priority	`schedule::Priority`
call	`Box<CallOrHashOf<T>>`

Python¶

call = substrate.compose_call(
    'Scheduler', 'schedule_named', {
    'call': {
        'Hash': '[u8; 32]',
        'Value': 'Call',
    },
    'id': 'Bytes',
    'maybe_periodic': (
        None,
        ('u32', 'u32'),
    ),
    'priority': 'u8',
    'when': 'u32',
}
)

schedule_named_after¶

Schedule a named task after a delay.

# <weight> Same as schedule_named. # </weight>

Attributes¶

Name	Type
id	`Vec<u8>`
after	`T::BlockNumber`
maybe_periodic	`Option<schedule::Period<T::BlockNumber>>`
priority	`schedule::Priority`
call	`Box<CallOrHashOf<T>>`

Python¶

call = substrate.compose_call(
    'Scheduler', 'schedule_named_after', {
    'after': 'u32',
    'call': {
        'Hash': '[u8; 32]',
        'Value': 'Call',
    },
    'id': 'Bytes',
    'maybe_periodic': (
        None,
        ('u32', 'u32'),
    ),
    'priority': 'u8',
}
)

Events¶

CallLookupFailed¶

The call for the provided hash was not found so the task has been aborted.

Attributes¶

Name	Type	Composition
task	`TaskAddress<T::BlockNumber>`	`('u32', 'u32')`
id	`Option<Vec<u8>>`	`(None, 'Bytes')`
error	`LookupError`	`('Unknown', 'BadFormat')`

Canceled¶

Canceled some task.

Attributes¶

Name	Type	Composition
when	`T::BlockNumber`	`u32`
index	`u32`	`u32`

Dispatched¶

Dispatched some task.

Attributes¶

Name	Type	Composition
task	`TaskAddress<T::BlockNumber>`	`('u32', 'u32')`
id	`Option<Vec<u8>>`	`(None, 'Bytes')`
result	`DispatchResult`	`{'Ok': (), 'Err': {'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')}}`

Scheduled¶

Scheduled some task.

Attributes¶

Name	Type	Composition
when	`T::BlockNumber`	`u32`
index	`u32`	`u32`

Storage functions¶

Agenda¶

Items to be executed, indexed by the block number that they should be executed on.

Python¶

result = substrate.query(
    'Scheduler', 'Agenda', ['u32']
)

Return value¶

[
    (
        None,
        {
            'call': {'Hash': '[u8; 32]', 'Value': 'Call'},
            'maybe_id': (None, 'Bytes'),
            'maybe_periodic': (None, ('u32', 'u32')),
            'origin': {
                None: None,
                'Council': {
                    'Member': 'AccountId',
                    'Members': ('u32', 'u32'),
                    '_Phantom': None,
                },
                'TechnicalCommittee': {
                    'Member': 'AccountId',
                    'Members': ('u32', 'u32'),
                    '_Phantom': None,
                },
                'Void': (),
                'system': {'None': None, 'Root': None, 'Signed': 'AccountId'},
            },
            'priority': 'u8',
        },
    ),
]

Lookup¶

Lookup from identity to the block number and index of the task.

Python¶

result = substrate.query(
    'Scheduler', 'Lookup', ['Bytes']
)

Return value¶

('u32', 'u32')

Constants¶

MaxScheduledPerBlock¶

The maximum number of scheduled calls in the queue for a single block. Not strictly enforced, but used for weight estimation.

Value¶

Python¶

constant = substrate.get_constant('Scheduler', 'MaxScheduledPerBlock')

MaximumWeight¶

The maximum weight that may be scheduled per block for any dispatchables of less priority than schedule::HARD_DEADLINE.

Value¶

1600000000000

Python¶

constant = substrate.get_constant('Scheduler', 'MaximumWeight')

Errors¶

FailedToSchedule¶

Failed to schedule a call

NotFound¶

Cannot find the scheduled call.

RescheduleNoChange¶

Reschedule failed because it does not change scheduled time.

TargetBlockNumberInPast¶

Given target block number is in the past.