Scheduled

Event v133 → current #0

Emitted when a task is successfully scheduled for future execution.

View events on chain

Useful for: developersanalytics

The Big Picture

Confirmation that a call has been queued for future execution at the specified block.

Use Cases

Confirm task was scheduled
Track scheduled operations
Build scheduling dashboards

From Chain Metadata

Scheduled some task.

Triggers

Emitted by

schedule schedule_named schedule_after schedule_named_after

Preconditions

Schedule call succeeded
Agenda had capacity at target block

Effects

Storage Modified

Agenda Lookup

Postconditions

Task queued in Agenda storage
Will execute at specified block

Side Effects

Deposit may be reserved

Event Data

#	Name	Type	Description
0	when	u32	Block number when the task will execute
1	index	u32	Index of the task within the block's agenda

Code Examples

import { ApiPromise, WsProvider } from "@polkadot/api";
import { stringCamelCase } from "@polkadot/util";

const provider = new WsProvider("wss://entrypoint-finney.opentensor.ai:443");
const api = await ApiPromise.create({ provider });

// Subscribe to Scheduled events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("Scheduler") &&
      event.method === "Scheduled"
    )
    .forEach(({ event }) => {
      console.log("Scheduled:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index: 15
Event Index: 0
First Version: v133
Current Version: v393

Back to Scheduler Events