> For the complete documentation index, see [llms.txt](https://docs.o3.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.o3.app/guides/swap/how-do-i-cross-chain-in-o3-cross-chain-wallet.md).

# How do I cross chain in O3 cross-chain wallet?

Before you start, please make sure your O3 cross-chain wallet is updated to the latest version (1.2.0).

Go to the wallet and find  \[Swap].

#### Step 1: Select the source chain, cross-chain assets, enter the number of assets, and select the wallet address.

![](/files/9V5zKA2P8LNPDcMk8qeT)

{% hint style="info" %}
If you don't want to enter the quantity of cross-chain assets manually, you can choose from the quantity ratio menu provided at the bottom of the page.
{% endhint %}

#### Step 2: Select the target chain, the assets to be crossed, and the receiving address.

{% hint style="info" %}
O3 cross-chain wallet supports cross-chain exchange with ***different addresses*****,** i.e. the outgoing address and the receiving address can be different. So remember to backup the private keys of all addresses.
{% endhint %}

#### Step 3: Click \[RFQ] and double check the cross-chain information in the detail page. Click \[Confirm] after confirming it is correct.

![](/files/eQA5GU0RfDn90dBd1xl4)

If this is the first time your wallet address or token of your choice has engaged in cross-chain activity, you will need to "approve" and then click "confirm".

#### Step 4: Enter your wallet password to start cross chain transaction.

O3 cross-chain wallet ***supports biometric verification***, you can go to \[Detail] - \[Biometric Verification] on the wallet home page to enable Touch ID/ Face ID.

![](/files/hipUAOpmTuUyeIOY6cBh)

**Tip:** You will receive two message notifications from O3 cross-chain wallet after you initiate each cross-chain transaction, one notifying the network fee and the other informing the cross-chain success.