Ethereum Staking Set for Quantum Leap
Ethereum developers have proposed a change to the staking deposit system that would allow for flexible validator key formats, including post-quantum keys. The proposal, outlined in pull request #12235, aims to support long-term staking adoption under Ethereum's post-quantum roadmap.
The current staking deposit contract expects public keys and signatures in fixed BLS12-381 formats, but the proposed change would add a scheme identifier and variable-length fields for the public key and credential metadata. This would enable future post-quantum validator keys to be admitted to the network.
The proposal defines three contract modes: disabled, BLS enabled, and BLS retired. Once the protocol-controlled system call activates the retired mode, new deposits using BLS formats would be rejected and could not be switched back on. Existing validators would not be migrated.