Ethereum's latest hard fork, London, went live today with several changes meant to prepare the cryptocurrency for long-term success. But one change in particular could drastically reduce the profitability of Ethereum mining in the process.
Ethereum Improvement Proposal (EIP) 1559 makes several changes to ETH transactions that favor cryptocurrency users over miners. The first is the introduction of an algorithmically determined base fee that is burned—which means it's permanently removed from circulation—when the transaction is completed.
The base fee introduced by EIP 1559 can be supplemented by a priority fee that a transaction can offer as incentive to miners for inclusion in their blocks. Transactions can also set a maximum fee, however, which means they only pay the priority fee if it doesn't exceed the amount they're willing to spend. (The base fee is always paid.) Here's how the authors of EIP 1559 explained the purpose of the proposal:
"This ensures that only ETH can ever be used to pay for transactions on Ethereum, cementing the economic value of ETH within the Ethereum platform and reducing risks associated with miner extractable value (MEV). Additionally, this burn counterbalances Ethereum inflation while still giving the block reward and priority fee to miners. Finally, ensuring the miner of a block does not receive the base fee is important because it removes miner incentive to manipulate the fee in order to extract more fees from users."
You can see the burning of ETH start at block 12,965,000, but as that was the first block after the switch, only 0.03 ETH was burned. More interesting is the running total, which you can see at the top of the Etherscan.io blocks list. At the time of writing, just under 900 blocks after the London fork went live, about 760 ETH has already been burned—aka, destroyed. That's over $2,000,000 worth of cryptocurrency, if you're wondering.
We did some quick calculations as well, to see how the London fork was affecting mining rewards. Prior to the fork, looking at 100 blocks (12,964,992 through 12,964,893), the average block reward was 2.581 ETH. After the fork, looking at another set of 100 blocks (12,965,779 through 12,965,680), the average reward dropped to 2.234 ETH. That's 'only' a 0.347 ETH difference, but it's still about 15% less profits for miners in the long run. It's also about $280,000 per hour in potential shared profits that will no longer be available.
