Optimism releases Superchain's quantum-resistant roadmap: ECDSA and EOA will be phased out within 10 years.

Optimism has released its quantum-resistant roadmap for Superchain, the core of which is announcing the phase-out of External Ownership Accounts (EOAs) based on ECDSA signatures over the next decade. Specifically, by January 2036, EOA transactions using ECDSA signatures on the Optimism mainnet and Superchain will be deprecated, and all such accounts will be required to delegate their key management to smart contract accounts that support post-quantum signatures.