> For the complete documentation index, see [llms.txt](https://doc.okok.network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.okok.network/product-guides/protocol-fees.md).

# Protocol Fees

Health Partnership

As you may know, to complete every bridge transaction, fund liquidity are indispensable in both chains; beside that, in target chain, sending ETH to your wallet also need gas fees(about 0.00004\~0.0006 ETH). So, To keep this game going, some protocol fee is a must.

| Ethereum gas price                      | Minimum protocol fee |
| --------------------------------------- | -------------------- |
| Ethereum gas price <=25 Gwei            | 0.00008 ETH          |
| 25 Gwei < Ethereum gas price <= 35 Gwei | 0.00012 ETH          |
| 35 Gwei < Ethereum gas price <= 45 Gwei | 0.00016 ETH          |
| 45 Gwei < Ethereum gas price            | 0.00020 ETH          |

For example:

&#x20;  Protocol fee = max(deposit\_ETH\_amount \* 0.06%, Minimum protocol fee of current Ethereum gas price)

* 1 ETH \* 0.06% = 0.0006 ETH protocol fee;
* Given that current Ethereum gas price is 30 Gwei, so minimum protocol fee is 0.00012 ETH, assuming deposited 0.1 ETH, then 0.1 ETH \* 0.06% = 0.00006 ETH, as 0.00006 ETH less than 0.00012 ETH, then charge protocol fee 0.00012 ETH.

## Bridge ETH between Arbitrum and Base:

<table><thead><tr><th width="220">Direction</th><th>Fee</th></tr></thead><tbody><tr><td>From Arbitrum to Base</td><td>max(deposit_ETH_amount * 0.12%, Minimum_protocol_fee * 2)</td></tr><tr><td>From Base to Arbitrum</td><td>max(deposit_ETH_amount * 0.42%, Minimum_protocol_fee * 7)</td></tr></tbody></table>

## Bridge ETH between Arbitrum and Scroll:

<table><thead><tr><th width="223">Direction</th><th>Fee</th></tr></thead><tbody><tr><td>From Arbitrum to Scroll</td><td>max(deposit_ETH_amount * 0.3%, Minimum_protocol_fee * scrollFactor)</td></tr><tr><td>From Scroll to Arbitrum</td><td>max(deposit_ETH_amount * 0.42%, Minimum_protocol_fee * 7)</td></tr></tbody></table>

<mark style="color:red;">**Note:**</mark> scrollFactor can be  6\~18 based on scroll's gas price. Scroll network's gas price is very very high when there are lot of transactions waiting to be processed.In normal, scrollFactor is 6.

{% hint style="success" %}
You can check current Ethereum gas price in [etherscan website](https://etherscan.io/chart/gasprice).

At some hours, Ethereum gas price is pretty high, we recommend you bridge your ETH in other low gas price hours.
{% endhint %}

{% hint style="info" %}
Arbitrum, Base and Scroll are L2 chains, how does bridge fee related to Ethereum gas price?

Currently, transaction fee in both Arbitrum and Base/Scroll are dominated by Ethereum gas price, check the following two examples (only difference is Ethereum gas price):
{% endhint %}

### [High fee case](https://basescan.org/tx/0xd39b6fb8b84f50e8489b5a1cbe1a0db02425e699de75ade932764171784b0708):

<figure><img src="https://3974871827-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrHfVBkSZrvTZsS6Kgusa%2Fuploads%2FoXMHdpyn9fZSbdnIFoBw%2Fhigh_fee.png?alt=media&amp;token=f28b050b-1b41-4c75-9577-c5b8db9d753a" alt=""><figcaption></figcaption></figure>

### [Low fee case](/product-guides/technical-support.md):

<figure><img src="https://3974871827-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrHfVBkSZrvTZsS6Kgusa%2Fuploads%2F0kQQSi3fUkt64gUiTWAT%2Flow_fee.png?alt=media&amp;token=bdff2413-b1f6-429b-8091-07c9c4459bdf" alt=""><figcaption></figcaption></figure>