# grantPermissions

Request permissions from a wallet to perform actions on behalf of a user.

[Read more.](https://eips.ethereum.org/EIPS/eip-7715)

:::warning[Warning]
This is an experimental action that is not supported in most wallets. It is recommended to have a fallback mechanism if using this in production.
:::

## Usage

:::code-group
```ts twoslash [example.ts]
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({ // [!code focus:99]
  account,
  expiry: 1716846083638,
  permissions: [
    {
      type: 'native-token-transfer',
      data: {
        ticker: 'ETH',
      },
      policies: [
        {
          type: 'token-allowance',
          data: {
            allowance: parseEther('1'),
          },
        },
      ],
    },
  ],
})
```

```ts twoslash [config.ts] filename="config.ts"
import 'viem/window'
// ---cut---
import { createWalletClient, custom } from 'viem'
import { mainnet } from 'viem/chains'
import { erc7715Actions } from 'viem/experimental'

export const walletClient = createWalletClient({
  chain: mainnet,
  transport: custom(window.ethereum!),
}).extend(erc7715Actions())

export const [account] = await walletClient.getAddresses()
```
:::

## Returns

`GrantPermissionsReturnType`

Response from the wallet after issuing permissions.

## Parameters

### account

* **Type:** `Account | Address | undefined`

The Account to scope the permissions to.

```ts twoslash
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({
  account, // [!code focus]
  expiry: 1716846083638,
  permissions: [
    {
      type: 'native-token-transfer',
      data: {
        ticker: 'ETH',
      },
      policies: [
        {
          type: 'token-allowance',
          data: {
            allowance: parseEther('1'),
          },
        },
      ],
    },
  ],
})
```

### expiry

* **Type:** `number`

The timestamp (in seconds) when the permissions will expire.

```ts twoslash
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({
  account,
  expiry: 1716846083638, // [!code focus]
  permissions: [
    {
      type: 'native-token-transfer',
      data: {
        ticker: 'ETH',
      },
      policies: [
        {
          type: 'token-allowance',
          data: {
            allowance: parseEther('1'),
          },
        },
      ],
    },
  ],
})
```

### permissions

* **Type:** `Permission[]`

Set of Permissions & Policies to grant to the user.

```ts twoslash
// @noErrors
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({
  account,
  expiry: 1716846083638,
  permissions: [ // [!code focus:19]
    {
      type: 'native-token-transfer',
      data: {
        ticker: 'ETH',
      },
      policies: [
        {
          type: 'token-allowance',
          data: {
            allowance: parseEther('1'),
          },
        },
      ],
    },
    { 
      type: '  
//           ^| 
    } 
  ], 
})
```

:::tip
The `type` property is constrained to the canonical set of [Permission & Policy types as
defined in ERC-7715](https://github.com/pedrouid/ERCs/blob/19c16341c57f6ac8770cb778d60845dcf30f6a40/ERCS/erc-7715.md#permissions), however, consumers can utilize a `custom` property on `type` as an escape hatch to use custom Permission or Policy types:

```ts twoslash
// @noErrors
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({
  account,
  expiry: 1716846083638,
  permissions: [
    { 
      type: { custom: 'example' }, // [!code focus]
      data: {
        value: '0xdeadbeef',
      }
    } 
  ], 
})
```
:::

### signer

* **Type:** `Signer | undefined`

Custom signer type to scope the permissions to.

```ts twoslash
import { parseEther } from 'viem'
import { account, walletClient } from './config'
 
const result = await walletClient.grantPermissions({
  expiry: 1716846083638,
  permissions: [ 
    { 
      type: 'native-token-limit', 
      data: { 
        amount: parseEther('0.5'), 
      }, 
      required: true, 
    }, 
  ], 
  signer: { // [!code focus]
    type: 'key', // [!code focus]
    data: { // [!code focus]
      id: '...' // [!code focus]
    } // [!code focus]
  } // [!code focus]
})
```