Current Value
128Relevant for: developers
The Big Picture
Contract storage keys have a maximum length. Very long keys would waste storage and slow lookups. Keep keys short and structured.
From Chain Metadata
The maximum allowable length in bytes for storage keys.
Use Cases
- Plan storage key naming
- Understand storage constraints
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 MaxStorageKeyLen constant
const value = api.consts[stringCamelCase("Contracts")][stringCamelCase("MaxStorageKeyLen")];
console.log("MaxStorageKeyLen:", value.toHuman());Type Information
- Type
- u32
- Byte Size
- 4 bytes
- Encoding
- fixed
- Raw Hex
- 0x80000000
Runtime Info
- Pallet
- Contracts
- First Version
- v334
- Latest Version
- v334
- Current Runtime
- v393