# Cross chain DEX How-to

## How to Use the LiFi Cross-Chain DEX Widget on TheStandard.io

This guide will walk you through the process of using the LiFi cross-chain DEX widget on app.thestandard.io/dex. We'll use the example of exchanging SUSHI on Ethereum for WETH on Arbitrum.

### Step 1: Access the Exchange Interface

Navigate to <https://app.thestandard.io/dex>. You'll see an interface similar to Image 1, with options to select the tokens you want to exchange.

### Step 2: Select the Source Token (From)

* Click on the "From" field .

<div align="left"><figure><img src="/files/aQNQS8icMKIvhgQXIcnz" alt="" width="343"><figcaption></figcaption></figure></div>

* You'll see a list of popular tokens and chains.

<div align="left"><figure><img src="/files/uNCDS1QWjCU3WerL0kNx" alt="" width="343"><figcaption></figcaption></figure></div>

* Scroll down or use the search bar to find the token you want to send.
* Click on the token you want to send (In the image examples we are choosing SUSHI on Ethereum  to select it as your source token.

### Step 3: Select the Destination Token (To)

* After selecting your token, the interface will update.

<div align="left"><figure><img src="/files/jnkubNOZPSrrYC2OnzsZ" alt="" width="343"><figcaption></figcaption></figure></div>

* Click on the "To" field.
* You'll see another list of tokens and chains.

<div align="left"><figure><img src="/files/wUpkxTJ8Yhl1ewCipzZO" alt="" width="343"><figcaption></figcaption></figure></div>

* Find and select The token that you want to arrive on the Arbitrum network.
* We are going to WETH.
* So in this example we are sending SUSHI on ETH and WETH will arrive on Arbitrum.&#x20;

### Step 4: Enter the Amount to Exchange

* In the "Send" field, enter the amount of SUSHI you want to exchange (Image 5).
* The interface will automatically calculate the amount of WETH you'll receive.

<div align="left"><figure><img src="/files/FIMhIE0fQTf8vFaBUm75" alt="" width="343"><figcaption></figcaption></figure></div>

### Step 5: Review Exchange Details

* The widget will display the best return for your exchange.
* You'll see the exchange rate, estimated gas fees, and transaction time.
* If you don't have enough funds, a warning will appear (as shown in Image 5).

### Step 6: Initiate the Exchange

* If you're satisfied with the exchange details and have sufficient funds, click the "Review bridge" button.
* You'll be prompted to confirm the transaction in your connected wallet.

### Step 7: Confirm the Transaction

* In your wallet (e.g., MetaMask), review the transaction details.
* Confirm the transaction and pay the associated gas fees.

### Step 8: Wait for Completion

* The widget will show the progress of your transaction.
* Cross-chain transactions may take several minutes to complete.
* Once finished, you'll receive your WETH on the Arbitrum network.

### Important Notes:

* Always double-check the token symbols and networks before confirming a transaction.
* Cross-chain transactions may incur higher fees due to the complexity of bridging assets between networks.
* Market conditions can change rapidly, so the final amount received may differ slightly from the initial estimate.
* Ensure you have enough ETH in your wallet to cover gas fees on both networks.


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