StatusFor

Storage Re-added Map v133 → v150, v151 → current

Status of a preimage by hash (deprecated).

Explore chain

Queried by: validatorsdevelopers

The Big Picture

Legacy status tracking for preimages.

Use Cases

Check if preimage exists

From Chain Metadata

The request status of a given hash.

Purpose & Usage

Purpose

Track preimage availability.

Common Query Patterns

Query by hash

Query Keys

#	Name	Type	Description
1	key1	H256	key1 (H256)

Stored Value

OldRequestStatus

value (OldRequestStatus)

Relationships

Modified By

ensure_updated note_preimage request_preimage unnote_preimage unrequest_preimage

Related Events

Cleared Noted Requested

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 StatusFor storage
const key1 = 0 as any /* H256 */;

const result = await api.query
  [stringCamelCase("Preimage")]
  [stringCamelCase("StatusFor")](
  key1
);

console.log("StatusFor:", result.toHuman());

Version History

Version:

v133 block 1,404,224 Added

v151 block 3,157,274 Re-added Current

Runtime Info

Pallet: Preimage
Storage Kind: Map
First Version: v133
Current Version: v393

Back to Preimage Storage