# Request signature

> Web3Auth React Native SDK - request | Embedded Wallets

The `request` method facilitates the use of templated transaction screens for signing transactions. This function returns a promise of the signature that can be used to broadcast the transaction.

Please check the list of [JSON RPC methods](https://docs.metamask.io/wallet/reference/json-rpc-api/), noting that the request method currently supports only the signing methods.

## Method

`request(chainConfig: ChainConfig, method: string, params: unknown[], path?: string): Promise<string>;`

## Parameters

| Arguments       | Description                                                                                                                                                                                            |
| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `chainConfig`   | Defines the chain to be used for signature.                                                                                                                                                            |
| `method`        | JSON RPC method name in `string`. Currently, the request method only supports the singing methods.                                                                                                     |
| `requestParams` | Parameters for the corresponding method. The parameters should be in the list and correct sequence. Take a look at [RPC methods](https://docs.metamask.io/wallet/reference/json-rpc-api) to know more. |

## Examples

### Personal sign

```tsx
const params = [
  {
    challenge: 'Hello World',
    address,
  },
  null,
]
const res = await web3auth.request(chainConfig, 'personal_sign', params)
```

### Personal sign shorthand

```tsx
const params = ['Hello World', address]
const res = await web3auth.request(chainConfig, 'personal_sign', params)
```

### Sign type 4

```tsx
const params = [
  address,
  {
    types: {
      EIP712Domain: [
        {
          name: 'name',
          type: 'string',
        },
        {
          name: 'version',
          type: 'string',
        },
        {
          name: 'chainId',
          type: 'uint256',
        },
        {
          name: 'verifyingContract',
          type: 'address',
        },
      ],
      Person: [
        {
          name: 'name',
          type: 'string',
        },
        {
          name: 'wallet',
          type: 'address',
        },
      ],
      Mail: [
        {
          name: 'from',
          type: 'Person',
        },
        {
          name: 'to',
          type: 'Person',
        },
        {
          name: 'contents',
          type: 'string',
        },
      ],
    },
    primaryType: 'Mail',
    domain: {
      name: 'Ether Mail',
      version: '1',
      chainId: 4,
      verifyingContract: '0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC',
    },
    message: {
      from: {
        name: 'Cow',
        wallet: '0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826',
      },
      to: {
        name: 'Bob',
        wallet: '0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB',
      },
      contents: 'Hello, Bob!',
    },
  },
]
const res = await web3auth.request(chainConfig, 'eth_signTypedData_v4', params)
```