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With advancements in quantum computing, the migration of smart contracts to post-quantum cryptography (PQC) is essential to safeguard digital assets. The EU's Coordinated Implementation Roadmap sets a deployment window from 2026 to 2030, while the US aims for 2035.

Major blockchains, including Ethereum and Solana, depend on vulnerable algorithms like ECDSA. NIST suggests CRYSTALS-Dilithium, FALCON, and SPHINCS+ as alternatives. Developers should implement a hybrid signing model for backward compatibility and modify contracts to incorporate PQC signatures. Testing on testnets like QRL's Project Zond is recommended prior to mainnet deployment.