useNetwork – wagmi

Docs

Hooks

useNetwork

Hook for switching networks with a connector.

import { useNetwork } from 'wagmi'

Usage

Some wallet apps do not support programmatic network switching and switchNetwork will be undefined. For those situations, you can typically switch networks in the wallet app and wagmi will stay up-to-date.

import { useNetwork } from 'wagmi'

function App() {
  const {
    activeChain,
    chains,
    error,
    isLoading,
    pendingChainId,
    switchNetwork,
  } = useNetwork()

  return (
    <>
      {activeChain && <div>Connected to {activeChain.name}</div>}

      {chains.map((x) => (
        <button
          disabled={!switchNetwork || x.id === activeChain?.id}
          key={x.id}
          onClick={() => switchNetwork?.(x.id)}
        >
          {x.name}
          {isLoading && pendingChainId === x.id && ' (switching)'}
        </button>
      ))}

      <div>{error && error.message}</div>
    </>
  )
}

Return Value

{
  activeChain?: Chain & { unsupported: boolean }
  chains: Chain[]
  data?: Chain
  error?: Error
  isError: boolean
  isIdle: boolean
  isLoading: boolean
  isSuccess: boolean
  pendingChainId?: number
  switchNetwork?: (chainId?: number) => void
  switchNetworkAsync?: (chainId?: number) => Promise<Chain>
  status: 'idle' | 'error' | 'loading' | 'success'
  reset: () => void
}

Configuration

chainId (optional)

Chain id to switch to. Useful if you want to switch to a specific chain, instead of displaying a list.

import { useNetwork } from 'wagmi'

function App() {
  const network = useNetwork({
    chainId: 69,
  })
}

onError (optional)

Function to invoke when an error is thrown while attempting to switch network.

import { useNetwork } from 'wagmi'

function App() {
  const network = useNetwork({
    onError(error) {
      console.log('Error', error)
    },
  })
}

onMutate (optional)

Function fires before switch network function and is passed same variables switch network function would receive. Value returned from this function will be passed to both onError and onSettled functions in event of a switch network failure.

import { useNetwork } from 'wagmi'

function App() {
  const network = useNetwork({
    onMutate(args) {
      console.log('Mutate', args)
    },
  })
}

onSettled (optional)

Function to invoke when switch network is settled (either successfully switched, or an error has thrown).

import { useNetwork } from 'wagmi'

function App() {
  const network = useNetwork({
    onSettled(data, error) {
      console.log('Settled', { data, error })
    },
  })
}

onSuccess (optional)

Function to invoke when switch network is successful.

import { useNetwork } from 'wagmi'

function App() {
  const network = useNetwork({
    onSuccess(data) {
      console.log('Success', data)
    },
  })
}

useFeeData

useProvider