Scheduler

Calls

cancel

Cancel an anonymously scheduled task.

Namespace

api.tx.scheduler.cancel

Type

function cancel(
  when: u32,
  index: u32
)

cancelNamed

Cancel a named scheduled task.

Namespace

api.tx.scheduler.cancelNamed

Type

function cancelNamed(
  id: Bytes
)

schedule

Anonymously schedule a task.

Namespace

api.tx.scheduler.schedule

Type

function schedule(
  when: u32,
  maybe_periodic: Option<(u32,u32)>,
  priority: u8,
  call: FrameSupportScheduleMaybeHashed
)

scheduleAfter

Anonymously schedule a task after a delay.

Namespace

api.tx.scheduler.scheduleAfter

Type

function scheduleAfter(
  after: u32,
  maybe_periodic: Option<(u32,u32)>,
  priority: u8,
  call: FrameSupportScheduleMaybeHashed
)

scheduleNamed

Schedule a named task.

Namespace

api.tx.scheduler.scheduleNamed

Type

function scheduleNamed(
  id: Bytes,
  when: u32,
  maybe_periodic: Option<(u32,u32)>,
  priority: u8,
  call: FrameSupportScheduleMaybeHashed
)

scheduleNamedAfter

Schedule a named task after a delay.

Namespace

api.tx.scheduler.scheduleNamedAfter

Type

function scheduleNamedAfter(
  id: Bytes,
  after: u32,
  maybe_periodic: Option<(u32,u32)>,
  priority: u8,
  call: FrameSupportScheduleMaybeHashed
)

Storage

agenda

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

Namespace

api.query.scheduler.agenda

Type

function agenda(
  u32
): Vec<Option<PalletSchedulerScheduledV3>>

lookup

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

Namespace

api.query.scheduler.lookup

Type

function lookup(
  Bytes
): Option<(u32,u32)>

Events

CallLookupFailed

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

Namespace

api.events.scheduler.CallLookupFailed

Type

type CallLookupFailed = {
  task: (u32,u32),
  id: Option<Bytes>,
  error: FrameSupportScheduleLookupError
}

Canceled

Canceled some task.

Namespace

api.events.scheduler.Canceled

Type

type Canceled = {
  when: u32,
  index: u32
}

Dispatched

Dispatched some task.

Namespace

api.events.scheduler.Dispatched

Type

type Dispatched = {
  task: (u32,u32),
  id: Option<Bytes>,
  result: Result<Null, SpRuntimeDispatchError>
}

Scheduled

Scheduled some task.

Namespace

api.events.scheduler.Scheduled

Type

type Scheduled = {
  when: u32,
  index: u32
}

Errors

FailedToSchedule

Failed to schedule a call

Namespace

api.errors.scheduler.FailedToSchedule

NotFound

Cannot find the scheduled call.

Namespace

api.errors.scheduler.NotFound

RescheduleNoChange

Reschedule failed because it does not change scheduled time.

Namespace

api.errors.scheduler.RescheduleNoChange

TargetBlockNumberInPast

Given target block number is in the past.

Namespace

api.errors.scheduler.TargetBlockNumberInPast

Constants

maximumWeight

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

Namespace

api.consts.scheduler.maximumWeight

Type

type maximumWeight = WeightV1

maxScheduledPerBlock

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

Namespace

api.consts.scheduler.maxScheduledPerBlock

Type

type maxScheduledPerBlock = u32

Source: https://docs.therootnetwork.com/build/substrate/api-reference/runtime-pallets/scheduler · captured 2026-05-16 · part of TRN Docs source map