> For the complete documentation index, see [llms.txt](https://guide-v1.elyfi.world/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guide-v1.elyfi.world/prerequisites/how-to-bridge-elfi-btw-ethereum-and-bsc.md).

# How to bridge ELFI btw Ethereum and BSC

This guide explains how to transfer\* ELFI tokens between networks(BSC and Ethereum). The ‘Portal Token Bridge’ provided by Wormhole is used for token transfer between networks.

* You should pay a network usage fee, so please prepare enough coins (ETH, BNB, etc.) to be used in each network.
* This guide also explains how to move ELFI tokens from Ethereum to BSC. In the opposite case, the process is similar, so please refer to this.

\*To be precise, when using the Token Bridge, the existing token is locked in the smart contract provided by the Wormhole Protocol, and a new Wrapped Token is minted on the target chain. In this guide, this series of processes will be referred to as ‘transfer’ for convenience.

### **Disclaimers**

The use of Portal Token Bridge is at the user's own discretion, and the user is responsible for any losses that may occur as a result. Therefore, we recommend that you use the Portal Token Bridge after familiarizing yourself with it.

This guide also uses the MetaMask Chrome extension. For other wallets, the method of using Portal Token Bridge may be different.

For more information on Wormhole and Portal Token Bridge, please refer [**here**](https://docs.wormholenetwork.com/wormhole/).

### **Step-by-step instructions**

1\. First, go to the ‘Portal Token Bridge’ site through the link below.

* Portal Token Bridge: <https://portalbridge.com/#/transfer>

![](/files/Ym4hUR64s9SHDT1tPzBq)

2\. Please select Source Chain\* and Target Chain\*\*.

\*Source chain: the network with the target token

\*\*Target chain: the network you want to transfer tokens to

![](/files/02BOfnmT2UeCezsruFDx)

3\. Please connect the Source chain wallet\*.

\*Source Chain Wallet: The wallet with the target token

![](/files/jas62q3dfwIJRAYILdLC)

4\. Click the ‘SELECT A TOKEN’ button to activate the pop-up window.

![](/files/3cP94lCckCW5jIGu1aYt)

5\. Enter the ELFI token address in the ‘Search name or paste address’ input box.

* ELFI (on Ethereum) address: **0x4dA34f8264CB33A5c9F17081B9EF5Ff6091116f4**
* When transferring ELFI tokens from BSC to Ethereum, you must enter the ELFI address on BSC after changing the source chain and target chain.
  * ELFI(on BSC) address: **0x6C619006043EaB742355395690c7b42d3411E8c0**

![](/files/TXv0CEOnzXCQMHztB2RT)

6\. Please make sure the token is selected correctly. Then, enter the amount of ELFI tokens you want to transfer to BSC in the Amount input filed and click the ‘NEXT’ button.

![](/files/6U0kA1C5zKupxPyZ7Asz)

7\. If you click the NEXT button earlier, a metamask pop-up window will appear asking you to change the network to the target chain. Click ‘Switch network’.

![](/files/jnUTq7NX5AmLA7ZkYswx)

8\. In case of using metamask extension, the wallet is automatically connected during wallet connection process of ‘2. Target’. After checking the target network, token information, and receiving wallet address, click the ‘NEXT’ button.

![](/files/M5zM46qaK4ZPbL7lZBvD)

9\. If you click the ‘NEXT’ button before, a metamask pop-up window will appear asking you to change the network to the source chain. Click ‘Switch network’.

![](/files/X1qfjKb9SEU3Uh9K6FYX)

10\. Click the ‘APPROVE n Token’ button to activate the metamask pop-up window.

![](/files/ddIVYX7BBeddWtEh8IwV)

11\. Click the Confirm button in the Metamask pop-up window.

![](/files/ZAcd8tSYswAKQNiBGLYg)

12\. Click the ‘TRANSFER’ button to launch the pop-up window.

![](/files/j5IkZ0bgiWUv2XXScgt9)

13\. After checking the contents in the pop-up window that has been executed, click the ‘CONFIRM’ button.

![](/files/j9WN11jlDQsT337Vi0Ip)

14\. In the activated metamask, click the Confirm button.

![](/files/erQ0crXzbu6cYWGdPcTY)

15\. When transaction processing is complete, a metamask pop-up window will appear requesting to change the network to the target chain. Click ‘Switch network’.

![](/files/lfWesc7oGG9rDLuqmZ4o)

16\. If you change the network, the REDEEM button becomes active. Click the button to activate MetaMask.

![](/files/6CefqxqiEOTnAOACTMfK)

17\. Click the Confirm button in the Metamask pop-up window.

![](/files/ylYCXe1wTyw6dxXRevN4)

18\. If the transaction is successfully processed, you will see ELFI tokens in your wallet.

![](/files/1Cf8rN9irVtp1IxZmq1O)


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