useChainId
Hook for getting current chain ID.
Import
ts
import { useChainId } from 'wagmi'
Usage
tsx
import { useChainId } from 'wagmi'
function App() {
const chainId = useChainId()
}
ts
import { http, createConfig } from 'wagmi'
import { mainnet, sepolia } from 'wagmi/chains'
export const config = createConfig({
chains: [mainnet, sepolia],
transports: {
[mainnet.id]: http(),
[sepolia.id]: http(),
},
})
Parameters
ts
import { type UseChainIdParameters } from 'wagmi'
config
Config | undefined
Config
to use instead of retrieving from the from nearest WagmiProvider
.
tsx
import { useChainId } from 'wagmi'
import { config } from './config'
function App() {
const chainId = useChainId({
config,
})
}
ts
import { http, createConfig } from 'wagmi'
import { mainnet, sepolia } from 'wagmi/chains'
export const config = createConfig({
chains: [mainnet, sepolia],
transports: {
[mainnet.id]: http(),
[sepolia.id]: http(),
},
})
Return Type
ts
import { type UseChainIdReturnType } from 'wagmi'
number
Current chain ID from config.state.chainId
.
INFO
Only returns chain IDs for chains configured via createConfig
's chains
parameter.
If the active connection chainId
is not from a chain included in your Wagmi Config
, useChainId
will return the last configured chain ID.