cairo-contract-events

name: cairo-contract-events description: Explain Starknet contract events, event enums, and emitting events; use when a request involves defining or emitting events in Cairo.

Cairo Contract Events

Overview

Explain how to define events and emit them from Cairo contracts.

Quick Use

• Read references/contract-events.md before answering.
• Define an Event enum with #[event] and #[derive(starknet::Event)].
• Mark indexed fields with #[key].

Response Checklist

• Emit events with self.emit(Event::Variant(...)).
• Use struct variants to keep event fields clear and typed.
• Use #[key] for fields that should be indexed.

Example Requests

• "How do I emit an event from a contract?"
• "What does #[key] do on an event field?"
• "How do I define multiple event types?"