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

# Migration guide from v8 to v8.1 for Embedded Wallets PnP iOS SDK

## Overview[​](#overview "Direct link to Overview")

This migration guide provides steps for upgrading from version 8(v8) to version 8.1(v8.1) of the Embedded Wallets PnP iOS SDK. The guide outlines significant changes and enhancements, including the removal of `chainConfig` parameter from `W3AInitParams`, and addition of `chainConfig` parameter in `launchWalletServices` method.

## Changes in detail[​](#changes-in-detail "Direct link to Changes in detail")

### `chainConfig` parameter changes[​](#chainconfig-parameter-changes "Direct link to chainconfig-parameter-changes")

From v8.1, the `chainConfig` parameter is removed from `W3AInitParams` and added to `launchWalletServices` method. This change ensures, developers can open the Wallet Services with their choice of chain on runtime.

#### Before (v8)[​](#before-v8 "Direct link to Before (v8)")

Usage

```
do {
  var chainConfig = ChainConfig(
    chainNamespace: ChainNamespace.eip155,
    chainId: "0x1",
    rpcTarget: "https://mainnet.infura.io/v3/${key}",
    ticker: "ETH"
  )

  val web3Auth = await Web3Auth(.init(
    clientId: clientID,
    network: network,
    buildEnv: buildEnv,
    chainConfig: chainConfig
  ))

  try await web3Auth?.launchWalletServices(
    W3ALoginParams(loginProvider: .GOOGLE),
  )
} catch {
  // Handle error
}

```

#### After (v8.1)[​](#after-v81 "Direct link to After (v8.1)")

Usage

```
do {
  var chainConfig = ChainConfig(
    chainNamespace: ChainNamespace.eip155,
    chainId: "0x1",
    rpcTarget: "https://mainnet.infura.io/v3/${key}",
    ticker: "ETH"
  )

  try await web3Auth?.launchWalletServices(
    W3ALoginParams(loginProvider: .GOOGLE),
    chainConfig: chainConfig
  )
} catch {
  // Handle error
}

```