> For the complete documentation index, see [llms.txt](https://docs.extrafi.io/extra_finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.extrafi.io/extra_finance/bridge-extra.md).

# Bridge EXTRA

EXTRA Bridge is powered by [LayerZero's omnichain bridge](https://layerzero.network/) and EXTRA currently can be bridged between Optimism and Base networks.

**EXTRA Tokens**

<table><thead><tr><th width="156.33333333333331">Chain</th><th width="426">Token Address</th><th>Explorer</th></tr></thead><tbody><tr><td>Optimism</td><td>0x2dad3a13ef0c6366220f989157009e501e7938f8</td><td><a href="https://optimistic.etherscan.io/token/0x2dad3a13ef0c6366220f989157009e501e7938f8">Etherscan</a></td></tr><tr><td>Base</td><td>0x2dad3a13ef0c6366220f989157009e501e7938f8</td><td><a href="https://basescan.org/token/0x2dad3a13ef0c6366220f989157009e501e7938f8">Basescan</a></td></tr></tbody></table>

**To bridge EXTRA between Optimism and Base networks, simply follow the steps below:**

1. Visit the [EXTRA Bridge page](https://app.extrafi.io/bridge)
2. Connect to your Web3 wallet (such as [MetaMask](/extra_finance/getting-started/metamask.md). Please ensure that you have a sufficient amount of ETH to cover on-chain gas fees. These fees will be charged by the Optimism/Base chain. ExtraFi still maintains 0.00 gas for in-app transactions)
3. Choose the **Optimism** network if you'd like to bridge EXTRA from Optimism to Base (Or choose the **Base** network if you'd like to bridge EXTRA from Base to Optimism)

<figure><img src="/files/fXvS38yXwI8deC4hddAL" alt=""><figcaption></figcaption></figure>

4. Enter the amount of EXTRA to bridge&#x20;
5. Click on "**Bridge**" and approve in your wallet

   <figure><img src="/files/2tzWImwBdIMuFpCqeeTy" alt="" width="389"><figcaption></figcaption></figure>
6. Switch the network to **Base/Optimism** and you'll see the bridged EXTRA tokens

   <figure><img src="/files/QuYwuRLiX8KgcSVtxaVo" alt=""><figcaption></figcaption></figure>