Definition ∞ An arbitrary call function permits a smart contract to execute any specified function on another contract. This capability provides extensive flexibility for contract interaction and system upgrades. However, if not implemented with stringent security checks, it presents a significant vector for unauthorized operations. Malicious actors could exploit such a function to drain funds or alter protocol logic.
Context ∞ Arbitrary call functions are a key topic in smart contract security audits, particularly concerning upgradeable proxy patterns and decentralized finance protocols. The ongoing debate involves balancing functional extensibility with the inherent security implications of granting broad execution powers. Future advancements focus on formal verification and stricter permissioning layers to limit potential abuse.