Cairo Contract Functions

Overview

Guide how to define contract entry points and control ABI exposure in Cairo.

Quick Use

• Read references/contract-functions.md before answering.
• Use #[starknet::interface] with #[abi(embed_v0)] for standard ABI definitions.
• Use self: ContractState for view, ref self: ContractState for state-mutating entry points.

Response Checklist

• Mark constructors with #[constructor] and L1 handlers with #[l1_handler].
• Use #[external(v0)] for public entry points if using per-item ABI.
• Explain that view functions are not enforced by the protocol.

Example Requests

• "How do I define a view function vs external function?"
• "Where do I put a constructor in a Cairo contract?"
• "How do I expose a function in the ABI?"