> For the complete documentation index, see [llms.txt](/llms.txt).

# useChain

Hook to read the currently active chain ID and chain namespace.

### Import

```tsx
import { useChain } from '@web3auth/modal/react'

```

### Usage

```tsx
import { CHAIN_NAMESPACES } from '@web3auth/modal'
import { useChain } from '@web3auth/modal/react'

function ActiveChain() {
  const { chainId, chainNamespace } = useChain()

  return (
    <div>
      <div>Chain ID: {chainId}</div>
      <div>Namespace: {chainNamespace}</div>
      {chainNamespace === CHAIN_NAMESPACES.SOLANA && <div>Solana chain is active</div>}
    </div>
  )
}

```

### Return type

```tsx
import { type IUseChain } from '@web3auth/modal/react'

```

#### `chainId`

`string | null`

Chain ID of the currently active chain.

#### `chainNamespace`

`ChainNamespaceType | null`

Chain namespace of the currently active chain (for example, `eip155` or `solana`).