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omgnetwork / optimism

Monorepo implementing the Optimistic Ethereum protocol
https://optimism.io
MIT License
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Boba Network Bridge Fees Are Too Expensive #546

Open ericyoung142 opened 3 years ago

ericyoung142 commented 3 years ago

Used the Fast Bridge to L2 Boba Network, at the time Ethereum average 60 gwei price. It cost me 2 x $45 transactions, and unable to edit gas fees without transactions failing. Recently bridged from Ethereum to the Avalanche blockchain for <$10 total, similar gwei price. I have a faint understanding that L2's require more complex code that L1's, and maybe Avax is compromising security for a lower bridging costs. Still, the cost of your bridge would make anyone except for the ultra Boba bull balk. If there's anyway to decrease the complexity of these bridge contracts I think it would go a long way for mass adoption of the Boba Network.

CAPtheorem commented 3 years ago

Yes, contract complexity and gas optimizations are on our radar. Expect progress in this regard by the end of the month.

CAPtheorem commented 3 years ago

Update - here are some numbers.

At current (Unix time: 16331455) gas prices (72 Gwei), the costs to bridge to L2 were measured to be:

Classical Bridge 0.0032 ETH for approval, 0.0371 ETH to bridge = 0.0403 ETH total cost Fast Bridge 0.0025 ETH for approval, 0.0131 ETH to bridge = 0.0156 ETH total cost

Generally the Fast Bridge is about 1/2 the price of the classical deposit, despite the 0.1% fast swap fee which is paid out to the liquidity providers.

CAPtheorem commented 3 years ago

Here is a recent article on cost comparison of Arbitrum vs. Optimism for various bridging and transfer operations:

https://inf.news/en/tech/bc8c0fa2ea6e0e2f3fe8963205cc8a36.html