> ## Documentation Index
> Fetch the complete documentation index at: https://docs.portalhq.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Cross-device sessions

> Use wallet provisioning to enable your users to create multiple signing shares across their devices.

Once users successfully back up their wallets, they can generate a new set of signing shares irrespective of the SDK in use. Furthermore, both the new and old sets of signing shares can be used simultaneously, thanks to **`portal.provisionWallet`**. This provisioning relies on the user already having a successful set of backup shares.

While provisioning, the wallet fetches the encryption key from the user's cloud storage provider to decrypt the encrypted client backup share. Note that our SDK handles the decryption; you only need to supply the encrypted client backup share.

For wallet provisioning support, consult [the recovery documentation](./recover-a-wallet) to establish the necessary **`/backup/fetch`** webhook. Also, ensure the user has successfully completed the backup process.

Here's how to implement **`portal.provisionWallet`**:

```tsx theme={null}
import axios from 'axios'
import { BackupMethods } from '@portal-hq/web'

const ProvisionButton: FC = () => {
  const handleProvision = async () => {
    // Get the existing encrypted client backup share from your API.
    const { data: backupShare } = await axios.get('/clients/[clientId]/backup')
    const backupMethod = BackupMethods.gdrive // Use the backupMethod that was used by the client when they backed up their wallet.
    const backupConfig = {}

    // Get a new signing share from running provisionWallet.
    await portal.provisionWallet(backupShare, backupMethod, backupConfig)
  }

  return (
    <button onClick={handleProvision}>Provision your wallet</button>
  )
}

 export default ProvisionButton
```

And that's it! You're now equipped to support multiple sessions across different devices for your users.