Smart Contract Design

- Contract architecture: identify core contracts, interfaces, and libraries - Access control: OpenZeppelin AccessControl or custom multi-sig (Gnosis Safe) - Upgradeability: UUPS proxy pattern with upgrade governance, or immutable contracts - Events design: emit for every state change for efficient front-end and indexer consumption - Gas optimization: storage packing, calldata vs memory, unchecked blocks, assembly for hot paths - Emergency pause: Pausable pattern for incident response - Standards compliance: ERC-20 / ERC-721 / ERC-1155 / EIP-712 typed signing as applicable