Stalled

Storage Plain v101 → current

Indicates GRANDPA has stalled with (delay, best_finalized_block).

Queried by: validatorsdevelopers

The Big Picture

When note_stalled is called, this storage records the stall. Contains the delay before forced change takes effect and the last finalized block. Presence indicates emergency recovery is in progress.

Use Cases

Check if finality is stalled
Monitor for consensus failures
Build alerting systems for finality issues

From Chain Metadata

`true` if we are currently stalled.

Purpose & Usage

Purpose

Records stall conditions for scheduled forced authority changes.

Common Query Patterns

Single value query (None if not stalled)

Stored Value

(u32, u32)

.0
delay — Delay (in blocks) for the GRANDPA stall: how long the protocol should wait before attempting recovery. Standard pallet_grandpa storage.
.1
best_finalized_block_number — Best finalized block number at the point of the stall — the reference block from which the delay is counted. Standard pallet_grandpa storage.

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

note_stalled

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 Stalled storage (no keys - plain value)
const result = await api.query.Grandpa.Stalled.getValue();
console.log("Stalled:", result);

Runtime Info

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

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