Immutable Chain plans to migrate to OP Stack by mid-2027, reducing block time to 1 second

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Immutable Chain plans to migrate to the OP Stack by mid-2027, reducing block time to 1 second

BlockBeats news, November 6, according to official sources, Immutable announced plans to upgrade Immutable Chain from a customized Geth-based fork to an OP Stack-based blockchain by mid-2027, while preserving the existing state and Chain ID. After the upgrade, all accounts, balances, smart contracts, and authorization records will remain unchanged, and in the vast majority of cases no action will be required from users or developers. This upgrade will reduce block time from 2 seconds to 1 second and make Immutable Chain an Ethereum Rollup, supporting state-proof-based cross-chain bridging and Ethereum data availability. However, transaction costs will increase slightly, and native withdrawal times will be extended to approximately 7 days. The migration is expected to require a pause in block production for several hours, and advance notice will be given once the specific timing is confirmed.

Immutable stated that this migration will be based on state commitments published directly to Ethereum for verification, replacing the existing native bridging solution that relies on the Axelar cross-chain messaging network, and will introduce permissioned fault proofs and zero-knowledge validity proofs in phases. In addition, building on the OP Stack will also help enable faster adoption of protocol upgrades, EVM upgrades, and security patches. At the same time, Immutable plans to discontinue support for game development testing on the current Immutable testnet by the end of 2026, because the testnet lacks third-party integrations and struggles to meet the testing needs of complex game flows, and most games have already shifted to local chains or production chains for testing.

Original link https://m.theblockbeats.info/flash/375908

Key points

Immutable announced plans to upgrade Immutable Chain from a Geth-based custom fork to an OP Stack-based blockchain in mid-2027.
The upgrade plan will retain the existing state and Chain ID, with accounts, balances, smart contracts, and authorization records expected to remain unchanged.
After the upgrade, the block time is planned to be shortened from 2 seconds to 1 second, and Immutable Chain will become an Ethereum Rollup.
The migration is expected to require a pause in block production for several hours, with specific timing to be announced in advance once confirmed.
Transaction costs are expected to rise slightly, and native withdrawal times will be extended to approximately 7 days.
Immutable plans to discontinue support for game development testing on the current Immutable testnet by the end of 2026.

AI-assisted interpretation

The following is analysis, separate from reported facts. Verify important claims independently.

This is a network upgrade plan that has not yet been executed: Immutable Chain wants to replace its underlying technology while preserving existing account and contract data as much as possible. The upgrade may make block production faster, but users need to pay attention to costs, withdrawal times, and downtime during the migration.

Why it matters to readers

If the plan is implemented as expected, block times will be shortened, and state-proof-based cross-chain bridging and Ethereum data availability will be supported; however, users and developers may face higher transaction costs, longer withdrawal times, and brief downtime.

Users may not necessarily need to take action for the time being, but should pay attention to the officially announced migration date, downtime arrangements, as well as post-upgrade transaction costs and withdrawal times.

Risks and unknowns

The migration has not yet been carried out, and it remains unknown whether the plan can be completed on schedule.
The specific migration time and the duration of the suspension of block production have not yet been confirmed.
Whether transaction costs have risen only slightly and whether withdrawal times are approximately 7 days need to be verified through actual operation.
The final arrangements for the end of testnet support have not been further confirmed.

Immutable Chain plans to migrate to OP Stack by mid-2027, reducing block time to 1 second

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