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)

Default Value

None (absent keys return no value)

Optional storage: querying a key that has never been written returns no value (None) — do not assume a zero default.

Relationships

Modified By

apply_authorized_upgrade set_code set_code_without_checks

Code Examples

import { createClient, Binary } from "polkadot-api";
import { getWsProvider } from "polkadot-api/ws";
import { sub } from "@polkadot-api/descriptors"; // generated by: npx papi add sub -w wss://entrypoint-finney.opentensor.ai:443

const client = createClient(getWsProvider("wss://entrypoint-finney.opentensor.ai:443"));
const api = client.getTypedApi(sub);

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

Runtime Info

Pallet: System
Storage Kind: Plain
First Version: v101
Current Version: v472

Back to System Storage