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

# Launch Wallet Services

The `launchWalletServices` method launches a WebView which allows you to use the prebuilt wallet UI services. The method takes `ChainConfig` as the required input. Wallet Services is currently only available for EVM chains.

note

Access to Wallet Services is gated. You can use this feature in `sapphire_devnet` at no cost. The minimum [pricing plan](https://web3auth.io/pricing.html) to use this feature in a production environment is the **Scale Plan**.

![Wallet Services](/img/embedded-wallets/wallet-services/mobile-wallet-services.png) 

## Parameters[​](#parameters "Direct link to Parameters")

- Table
- Class

| Parameter         | Description                                                                                                               |
| ----------------- | ------------------------------------------------------------------------------------------------------------------------- |
| chainNamespace    | Custom configuration for your preferred blockchain. As of now only EVM supported. Default value is ChainNamespace.eip155. |
| decimals?         | Number of decimals for the currency ticker. Default value is 18, and accepts Int as value.                                |
| blockExplorerUrl? | Blockchain's explorer URL. (for example, https://etherscan.io)                                                            |
| chainId           | The chain ID of the selected blockchain String.                                                                           |
| displayName?      | Display Name for the chain.                                                                                               |
| logo?             | Logo for the selected chainNamespace and chainId.                                                                         |
| rpcTarget         | RPC Target URL for the selected chainNamespace and chainId.                                                               |
| ticker?           | Default currency ticker of the network (for example, ETH).                                                                |
| tickerName?       | Name for currency ticker (for example, Ethereum).                                                                         |

```
public struct ChainConfig: Codable {
    public init(chainNamespace: ChainNamespace = ChainNamespace.eip155, decimals: Int? = 18, blockExplorerUrl: String? = nil, chainId: String, displayName: String? = nil, logo: String? = nil, rpcTarget: String, ticker: String? = nil, tickerName: String? = nil) {
        self.chainNamespace = chainNamespace
        self.decimals = decimals
        self.blockExplorerUrl = blockExplorerUrl
        self.chainId = chainId
        self.displayName = displayName
        self.logo = logo
        self.rpcTarget = rpcTarget
        self.ticker = ticker
        self.tickerName = tickerName
    }
}


```

## Usage[​](#usage "Direct link to Usage")

```
do {
  try await web3Auth!.launchWalletServices(
    chainConfig: ChainConfig(
      chainId: "0xaa36a7",
      rpcTarget: "https://eth-sepolia.public.blastapi.io"
    )
   )
} catch {
  print(error.localizedDescription)
  // Handle error
}

```