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Architecture · hard

5. Cairo Components & Modularity

Reusable, composable contract logic.

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Components in Cairo are reusable modules (similar to Solidity multiple inheritance / OpenZeppelin extensions) that embed storage, events, and logic into contracts.

cairo
#[starknet::component]
mod OwnableComponent { ... }

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1. What is a Component in Starknet Cairo?
A reusable on-chain module providing storage, logic, and events that contracts can embedA front-end UI buttonA validator clientA database server

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