🌱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:

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:

Direction	Fee
From Arbitrum to Base	max(deposit_ETH_amount * 0.12%, Minimum_protocol_fee * 2)
From Base to Arbitrum	max(deposit_ETH_amount * 0.42%, Minimum_protocol_fee * 7)

Bridge ETH between Arbitrum and Scroll:

Direction	Fee
From Arbitrum to Scroll	max(deposit_ETH_amount * 0.3%, Minimum_protocol_fee * scrollFactor)
From Scroll to Arbitrum	max(deposit_ETH_amount * 0.42%, Minimum_protocol_fee * 7)

Note: 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.

You can check current Ethereum gas price in etherscan website.

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

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):

High fee case:

Low fee case: