We are working on adding Beacon Chain support to ethlambda, progressively implementing the needed functionality for post-quantum cryptography, and will actively contribute to Ethereum mainnet.
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Our entrance into Lean Ethereum was our way to help in Ethereum's transition to post-quantum cryptography. Because of the rapidly shrinking Q-day estimates, the post-quantum migration has become more urgent. We feel moving to the Beacon Chain is the logical next step.

Sep 30, 2026 · 2:33 PM UTC

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The idea is that ethlambda can run in either Lean mode or Beacon mode. To make that possible, we're building the client on a shared base and modularizing the differences. Over the upcoming forks, those differences will keep shrinking.
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The code and instructions on how to run are available in this branch: github.com/lambdaclass/ethla… We'll keep pushing the limits on post-quantum scalability, even during the transition from Beacon to Lean Chain.
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This branch is going to be merged into main soon, and future ethlambda releases will include the new Beacon Chain functionality.
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