what's Kleidi?

Kleidi is an institutional-grade, self-custodial smart contract wallet for Ethereum and EVM chains, tailored for protocol treasuries, high-net-worth individuals, and institutions holding significant crypto assets. It prioritizes security by introducing timelocks as a fundamental primitive: every outbound transaction incurs a configurable delay (e.g., 24 hours) between signing and execution, providing a critical window for review, verification, or cancellation by the user or guardians. This mitigates prevalent threats like phishing, address poisoning, coercion, fat-finger errors, and silent drains without intermediaries or trusted third parties. Complementing timelocks, Kleidi employs a multi-layered defense architecture including policy engines to enforce user-defined rules (e.g., blocking approvals to unverified contracts or cross-chain errors), guardian systems for intervention, and on-chain calldata storage for transparency. Built on formally verified smart contracts audited by leading firms with zero critical issues, it extends DeFi governance timelock precedents (e.g., Aave, Compound) to personal custody, integrating with multisigs and hardware wallets while preserving atomicity on approved paths.