Macauley Peterson

<div id="highlights-block_62bdd4b2a6493" class="highlights">
 <ul>
 <li>The hard fork pushed back the so-called “difficulty bomb,” which had been gradually slowing Ethereum block production, improving performance in the short term</li>
 <li>The Merge has not been scheduled, but the new timing of the difficulty bomb points to when Ethereum core developers think it will take effect</li>
 </ul>
 
</div>



Ethereum’s scheduled Grey Glacier hard fork went into effect on Thursday at 6:54 am ET — <a href="https://etherscan.io/block/15050000" target="_blank" rel="noreferrer noopener">Block 15050000</a> to be precise — and caused no problems, according to Ethereum client developer <a href="https://nethermind.io/" target="_blank" rel="noreferrer noopener">Nethermind</a> and the Ethereum Foundation’s <a href="https://twitter.com/TimBeiko/status/1542463390475423745" target="_blank" rel="noreferrer noopener">Tim Beiko</a>.&nbsp;



The sole purpose of the fork was to postpone the so-called <a href="https://ethereum.org/en/glossary/#difficulty-bomb" target="_blank" rel="noreferrer noopener">difficulty bomb</a> by about three months. That remains the most likely time frame for the hotly anticipated <a href="https://cms.blockworks.co/shadow-forks-and-testnets-the-ethereum-merge-approaches/" target="_blank" rel="noreferrer noopener">Merge with the proof-of-stake Beacon Chain</a>. A hard <a href="https://www.blockworksresearch.com/glossary/?search=fork" target="_blank" rel="noreferrer noopener">fork</a> is a software upgrade that splits a blockchain in two, with all network participants coordinating around the new chain.



Learn More: <a href="https://cms.blockworks.co/the-investors-guide-to-the-ethereum-merge/">The Investor&#8217;s Guide to the Ethereum Merge</a> 



The difficulty bomb doesn’t “go off” all at once, but it gradually forces an “exponential increase in proof-of-work difficulty setting designed to motivate the transition [from proof-of-work] to proof-of-stake,” according to ethereum.org. In essence, it deliberately increases the time it takes to make a new block of transactions, slowing down the network. As a result, miners have no incentive to continue mining the proof-of-work chain as it gradually grinds to a halt.



A prior hard fork, in December 2021, postponed the difficulty bomb until June, when the Ethereum community previously hoped to execute The Merge. So the Ethereum network was in fact slowing down; block production times had increased from the usual 12-14 seconds to 16 seconds in recent weeks.



The new network upgrade pushes back the bomb — also known as the Ice Age — by 700,000 Ethereum blocks, or around 100 days’ time, restoring the status quo.



The upgrade passed by so smoothly, it was barely mentioned during Thursday’s <a href="https://youtu.be/Fid8hTxkRHM?t=1177" target="_blank" rel="noreferrer noopener">Ethereum Core Developers Meeting</a> to discuss The Merge.



“Grey Glacier went fine, by the way,” Marius van der Wijden said during the call, noting that only a small fraction of Ethereum nodes had not upgraded in time.



Shortly before the hard fork, Ethereum passed another milestone, <a href="https://watchtheburn.com/" target="_blank" rel="noreferrer noopener">burning 2.5 million ETH</a>, thanks to <a href="https://cms.blockworks.co/?s=eip+1559" target="_blank" rel="noreferrer noopener">EIP-1559</a>, an upgrade activated in August 2021. That represents over $2.5 billion in value, which offsets some of the ETH issuance through proof-of-work. After The Merge ether issuance is expected to drop by as much as 90%.



If it doesn’t get postponed again, the new difficulty bomb will start to take effect in October, giving developers a clear target by when to deliver The Merge upgrade and execute the historic transition to a proof-of-stake regime.



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