Queried by: developerswallets
The Big Picture
The chain ID is critical for Ethereum compatibility - it's included in transaction signatures to prevent replay attacks across different networks. Wallets need this to sign correctly.
Use Cases
- Configure wallet chain ID
- Validate transaction signatures
- Prevent replay attacks across chains
From Chain Metadata
The EVM chain ID.
Purpose & Usage
Purpose
Stores the chain ID used for Ethereum transaction signing.
Common Query Patterns
- Single value query
Stored Value
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 ChainId storage (no keys - plain value)
const result = await api.query
[stringCamelCase("EVMChainId")]
[stringCamelCase("ChainId")]();
console.log("ChainId:", result.toHuman());Runtime Info
- Pallet
- EVMChainId
- Storage Kind
- Plain
- First Version
- v210
- Current Version
- v393