# Migrate from the connect legacy SDK

{% hint style="info" %}
If you already have a connect license, **please contact us so that we update you to the new 4337 licensing model**.
{% endhint %}

The migration will allow you to use Safe 1.3.0 accounts created with Connect Legacy in the Connect 4337 SDK.

What will happen:

* The Safe account is migrated to version 1.4.1. 
* If the user was using a Passkey as signer, the [safeWebAuthnSharedSigner](https://github.com/safe-global/safe-modules/blob/main/modules/passkey/contracts/4337/SafeWebAuthnSharedSigner.sol) will be added as an owner and configured to work with the user's Passkey.

{% hint style="warning" %}
If you have multiple passkeys controlling the account, **only the passkey on the device you are doing the migration will be usable**. Other passkeys won't be working and should be removed.
{% endhint %}

This is the flow you are supposed to follow:

```typescript
import {
    createComethPaymasterClient,
    createLegacySafeSmartAccount,
    createSafeSmartAccount,
    createSmartAccountClient
} from "@cometh/connect-sdk-4337";
import { http, encodeFunctionData } from "viem;
import { gnosis } from "viem/chains";
import countContractAbi from "../contract/counterABI.json";


const apiKeyLegacy = process.env.NEXT_PUBLIC_COMETH_LEGACY_API_KEY;
const apiKey4337 = process.env.NEXT_PUBLIC_COMETH_4337_API_KEY;

const chain = gnosis;

const bundlerUrl = "https://bundler.cometh.io/"+CHAIN_ID+"?apikey="+COMETH_4337_API_KEY;
const paymasterUrl =  "https://paymaster.cometh.io/"+CHAIN_ID+"?apikey="+COMETH_4337_API_KEY;


// Step 1 -  This is the address of you safe using the connect legacy
const smartAccountAddress = LEGACY_ADDRESS

// Step 2 - Create the legacy ts object to available migration  
const legacyClient = await createLegacySafeSmartAccount({
    apiKeyLegacy,
    apiKey4337,
    chain,
    smartAccountAddress
})

// Step 3 - Migrate the safe 
await legacyClient.migrate()


// Your Safe is now migrated, you can use the 4337 SDK
// Create the new ts object to handle the upgraded safe
const updatedSmartAccount = await createSafeSmartAccount({
    apiKey,
    chain,
    smartAccountAddress,
});

const paymasterClient = await createComethPaymasterClient({
    transport: http(paymasterUrl),
    chain,
});

const smartAccountClient = createSmartAccountClient({
    account: smartAccount,
    chain,
    paymaster: paymasterClient,
    bundlerTransport: http(bundlerUrl),
    userOperation: {
        estimateFeesPerGas: async () => {
            return await paymasterClient.getUserOperationGasPrice();
        },
    },
})

const calldata = encodeFunctionData({
    abi: countContractAbi,
    functionName: "count
});

//You can send transaction witht the new sdk
const txHash = await smartAccountClient.sendTransaction({
    to: COUNTER_CONTRACT_ADDRESS,
    data: calldata
});

```

You can also check if the safe account has been migrated:

```typescript
const isTheAccountMigrated = await legacyClient.hasMigrated()
```