Network Fees
Rubicon order books are on-chain, all transactions require network fees (gas) that are paid in ETH. Gas fees on Optimism (opens in a new tab) are 50-100x cheaper than Ethereum Mainnet, you can monitor them on this public dashboard (opens in a new tab).
Trading Fees
Taker Fee: 0.01%
Paid by Swaps, Market Orders, and orders that take liquidity from the order book
Maker Fee: 0%
Limit Orders that make liquidity on the order book do not pay fees other than gas
Liquidity Pool Fees
Withdrawal Fee: 0.03%
A withdrawal fee is paid back into the pool, effectively rewarding remaining liquidity providers. Stops pool spam. (These are variable protocol parameters and could change)