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So, lately i've been doing research about gas fees and how they work. I got the most part but there's something I don't yet understand.

The theory of gas fees in ETH is that whenever you do a transaction, the miner that includes the transaction in the block and creates it, gets the transaction fee as a reward. Great.

However, in DEXs like uniswap, it only says that it charges a 0.30% fee that goes to the liquidity providers. Does that mean that instead of going to the miners, the fee goes to the liquidity providers? Or is this 0.30% an additional fee on top of the miners fees? I can't find the answer anywhere. So if anyone knows how this works, i would really appreciate it.

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However, in DEXs like uniswap, it only says that it charges a 0.30% fee that goes to the liquidity providers.

You are mixing too separate concepts

  • Gas fee goes to Ethereum transaction miners for including your transaction in a block in Ethereum blockchain

  • Uniswap fee goes to the liquidity providers of Uniswap pair

You pay both when you swap at Uniswap or similar.

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    Thank you very much! I couldn't find this answer anywhere.
    – F_Bass
    Commented Apr 22, 2021 at 20:42
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I received from Uniswap customer service the following, as I was not able to swap or perform any action due to gas fees, despite the fact that I POSSESSED ETH in my wallet, hope it helps:

Thanks for reaching out to Uniswap Labs! I am happy to assist you with this.

You are receiving this message because you do not have enough of the network’s native token that is required to pay the network costs (gas fees).

You need enough of the native token on the correct network to pay for the network cost of the transaction.

For example, if you were trying to complete a transaction on the Arbitrum network, you would need to cover the network costs with Arbitrum-ETH.

Supported network’s native tokens: Ethereum's native coin: ETH Optimism L2's native coin: OP-ETH Arbitrum L2's native coin: ARB-ETH Polygon's native coin: MATIC BNB/BSC chain's native coin: BNB BASE's native coin: BASE-ETH Celo's (only web) native coin: CELO Avalanche's (only web) native coin: AVAX Blast’s (only web) native coin: BLAST-ETH

If you are in this situation, there are options for you: You can purchase more ETH/network's native coin using the buy crypto feature in the Uniswap Wallet (not available for BNB, BASE, CELO, AVAX networks) You can transfer more ETH/network native coin into your wallet from another exchange, wallet, etc. You can bridge tokens to the network you are swapping on to pay for the network costs

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