Queried by: developersanalyticswallets
The Big Picture
The canonical chain height. Increments by 1 each block.
Use Cases
- Track chain progress
- Calculate time from blocks
From Chain Metadata
The current block number being processed. Set by `execute_block`.
Purpose & Usage
Purpose
Track chain height.
Common Query Patterns
- Single value query
Stored Value
value (u32)
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 Number storage (no keys - plain value)
const result = await api.query
[stringCamelCase("System")]
[stringCamelCase("Number")]();
console.log("Number:", result.toHuman());Runtime Info
- Pallet
- System
- Storage Kind
- Plain
- First Version
- v101
- Current Version
- v393