Queried by: validatorsdevelopers
The Big Picture
Part of block header. Links each block to its parent.
Use Cases
- Verify block lineage
From Chain Metadata
Hash of the previous block.
Purpose & Usage
Purpose
Link to parent block in chain.
Common Query Patterns
- Single value query
Stored Value
value (H256)
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 ParentHash storage (no keys - plain value)
const result = await api.query
[stringCamelCase("System")]
[stringCamelCase("ParentHash")]();
console.log("ParentHash:", result.toHuman());Runtime Info
- Pallet
- System
- Storage Kind
- Plain
- First Version
- v101
- Current Version
- v393