Optimism has announced a post-quantum roadmap for its Superchain. According to Foresight News, the plan includes phasing out ECDSA-based external accounts (EOA) on the OP mainnet and Superchain within ten years, contingent upon governance approval. All ECDSA EOAs will need to delegate private key management to post-quantum smart contract accounts. Once the transition period ends, OP Stack chains will gradually eliminate transactions using original ECDSA signatures for EOAs. The OP Stack chains will follow a unified roadmap to ensure upgrades are synchronized across the entire Superchain network.