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<p><a href="https://x.com/Immutable" rel="noopener noreferrer nofollow">@Immutable</a> (<a href="https://x.com/search?q=%24IMX&amp;src=cashtag_click" rel="noopener noreferrer nofollow">$IMX</a>) plans to move Immutable Chain from its custom-built setup to the OP Stack, the open-source chain framework from <a href="https://x.com/Optimism" rel="noopener noreferrer nofollow">@Optimism</a> (<a href="https://x.com/search?q=%24OP&amp;src=cashtag_click" rel="noopener noreferrer nofollow">$OP</a>). The company is targeting the middle of 2027 for the switch. Block times will fall from two seconds to one.</p>
<p>Immutable Chain currently runs on a heavily modified fork of Go-Ethereum (Geth). <cite>The upgrade moves it to an OP Stack-based architecture by mid-2027</cite>, and <cite>the network will become a standard Ethereum Rollup</cite>. <cite>Immutable will also join the Optimism Superchain interoperability network.</cite></p>
<h2 id="what-changes-for-users-and-developers">What Changes for Users and Developers</h2>
<p>Immutable says the migration should be largely invisible to users. Accounts, balances and contracts will carry over automatically, and almost no one will need to act. <cite>Existing Chain IDs, user addresses, token balances, smart contract logic and on-chain authorization records are to be preserved.</cite></p>
<p>There are trade-offs. Transaction fees will rise slightly, and block production will pause for a few hours on switch day. <cite>Immutable says transactions will get slightly more expensive, and notes that gas on the chain is extremely cheap at present.</cite><cite>The company says it will announce the date well ahead of time once it is confirmed.</cite></p>
<p>The upgrade also changes how assets move between chains. <cite>Immutable Chain's native bridge currently runs on Axelar, an external cross-chain messaging network.</cite><cite>That relay setup will be replaced with Ethereum-native state commitments.</cite><cite>Immutable expects most bridging volume to keep going through faster liquidity bridges.</cite></p>
<h2 id="security-model-and-maintenance">Security Model and Maintenance</h2>
<p><cite>At launch, Immutable will use permissioned fault proofs, with zk-validity proofs to follow later.</cite><cite>The company says the OP Stack will also let it pick up protocol upgrades, EVM upgrades and security patches faster.</cite> Running on a shared framework should reduce the work of maintaining a bespoke client. <cite>Before the OP Stack, launching a layer-2 network meant forking Optimism's monolithic node software and maintaining a divergent codebase indefinitely, whereas the OP Stack splits each function into a module with a published interface.</cite></p>
<p>Immutable's chain has so far processed almost 250 million transactions across more than 18 million wallets, according to the company. The move adds to Optimism's growing roster of OP Stack networks. <cite>The OP Stack is the open-source framework that powers OP Mainnet and dozens of other chains.</cite></p>
<p>Immutable has previously consolidated its infrastructure. <cite>It merged Immutable X and Immutable zkEVM into a single Immutable chain</cite>, and the OP Stack move is the next step in that simplification.</p>
<h2 id="sources">Sources</h2>
<p><a href="https://egamers.io/immutable-chain-will-become-an-op-stack-rollup-on-ethereum-with-1-second-blocks-targeted-for-mid-2027/" rel="noopener noreferrer nofollow">EGamers: Immutable Chain Will Become an OP Stack Rollup on Ethereum</a></p>
<p><a href="https://www.techflowpost.com/en-US/article/35157" rel="noopener noreferrer nofollow">TechFlow: Immutable Announces Transition to Ethereum Rollup</a></p>
<p><a href="https://eco.com/support/en/articles/11779236-what-is-the-op-stack-architecture-and-superchain-explained" rel="noopener noreferrer nofollow">Eco: What Is the OP Stack? Architecture and Superchain Explained</a></p>
<p><a href="https://bsc.news/latest-news?utm_source=coinmarketcap&amp;utm_medium=feed" rel="noopener noreferrer nofollow">See more news on bsc.news</a></p>

Immutable Chain to Migrate to Optimism's OP Stack by Mid-2027, Halving Block Time to One Second

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