CodeUpdated

Event v101 → current #2

Emitted when the runtime code is updated.

View events on chain

From Chain Metadata

`:code` was updated.

Triggers

Preconditions

  • Valid runtime upgrade authorized
  • New code is valid WASM

Effects

Postconditions

  • New runtime code in effect
  • Spec version typically incremented

Side Effects

  • All nodes must update to new runtime
  • May change behavior of existing calls

This event has no data fields.

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 CodeUpdated events
api.query.system.events((events) => {
  events
    .filter(({ event }) =>
      event.section === stringCamelCase("System") &&
      event.method === "CodeUpdated"
    )
    .forEach(({ event }) => {
      console.log("CodeUpdated:", event.data.toHuman());
    });
});

Runtime Info

Pallet Index
0
Event Index
2
First Version
v101
Current Version
v393
Back to System Events