CurrentSetId

Storage Plain v101 → current

Monotonically increasing counter for GRANDPA authority set changes.

Queried by: validatorsdevelopersanalytics

The Big Picture

Every time the authority set changes, this counter increments. It's used to identify which set was active during any given period - essential for validating equivocation proofs which must reference the correct set.

Use Cases

Track how many authority set changes have occurred since genesis
Construct equivocation proofs (requires set ID)
Correlate events with specific authority sets

From Chain Metadata

The number of changes (both in terms of keys and underlying economic responsibilities) in the "set" of Grandpa validators from genesis.

Purpose & Usage

Purpose

Uniquely identifies each authority set for equivocation proof validation.

Common Query Patterns

Single value query

Stored Value

u64

Value in RAO (÷10⁹ for TAO)

RAO -> TAO (/ 10^9)

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

Runtime Info

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

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