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We have a general question regarding gas fees and we would like to get a better understanding on how an Ethereum based gateway might work.

Let's take for example the implementation of Coinbase marketplace. Every time you are generating a new invoice, Coinbase allows you to pay it using a different Ethereum address. For example let's imagine that we have the following addresses:

In the end it allows you to withdraw the total of the amount using another wallet:

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How do they avoid fees, if they do of course, while moving the funds from the addresses where the payment was done to the main wallet address?

According to https://github.com/btcpayserver/btcpayserver/pull/1730 what we describe was the reason that they "removed" the Ethereum support from BTCPayserver as well.

Is the only solution to just create a single wallet for each "merchant" instead?

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  • Coinbase had a solution using smart contracts, see their blog blog.coinbase.com/…, but that was 3 years ago.
    – Ismael
    Apr 14, 2022 at 13:13
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    thanks a lot @Ismael! We will take a look!
    – glarkou
    Apr 15, 2022 at 7:58

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There's no way to avoid fees on Ethereum or other similar forks.

The minimum transaction gas use is 21000, that's also the gas cost of a basic value transfer transaction.

That's also true for the London fork, taken from Ethereum's blog -

Starting with the London network upgrade, every block has a base fee, the minimum price per unit of gas for inclusion in this block, calculated by the network based on demand for block space.

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