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

# wallet_switchEthereumChain

Requests that the wallet switches its active Ethereum chain. Specified by [EIP-3326](https://eips.ethereum.org/EIPS/eip-3326).

### Parameters

`Chain`(object)

Object containing the chain ID to switch to.

Chain properties▼

### Returns

This method returns `null` if the active chain is switched.

### Errors

| Code | Description                                                                      |
| ---- | -------------------------------------------------------------------------------- |
| 4902 | Unrecognized chain ID. Try adding the chain using wallet_addEthereumChain first. |

Example request

```
await provider.request({
  method: 'wallet_switchEthereumChain',
  params: [
    {
      chainId: '0x64',
    },
  ],
})

```

Example response

```
{
  "id": 1,
  "jsonrpc": "2.0",
  "result": null
}

```