LastRuntimeUpgrade

Storage Plain v101 → current

Information about the last runtime upgrade.

Explore chain

Queried by: validatorsdevelopersanalytics

The Big Picture

Records when and what the last runtime upgrade was.

Use Cases

Check current runtime version
Verify upgrade history

From Chain Metadata

Stores the `spec_version` and `spec_name` of when the last runtime upgrade happened.

Purpose & Usage

Purpose

Track spec version and name of current runtime.

Common Query Patterns

Single value query

Stored Value

LastRuntimeUpgradeInfo

value (LastRuntimeUpgradeInfo)

Relationships

Modified By

apply_authorized_upgrade set_code set_code_without_checks

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 });

// Query LastRuntimeUpgrade storage (no keys - plain value)
const result = await api.query
  [stringCamelCase("System")]
  [stringCamelCase("LastRuntimeUpgrade")]();
console.log("LastRuntimeUpgrade:", result.toHuman());

Runtime Info

Pallet: System
Storage Kind: Plain
First Version: v101
Current Version: v393

Back to System Storage