Cairo for Solidity Developers Cairo is a Rust-inspired language that compiles to bytecode, which runs on the Cairo Virtual Machine. The Cairo virtual machine is a zero-knowledge virtual machine...

Components Part 2: OpenZeppelin ERC-20 Tutorial In Component Part 1, we learned how to create and use a component within a single file. We built a from scratch and integrated its storage, events, and...

Events in Starknet Events emit data from contract execution into the transaction receipt. The receipt holds metadata about what happened during the execution, which can be queried or indexed by...

Constructors in Cairo A constructor is a one-time-call function executed during contract deployment to initialize state variables, perform contract setup tasks, make cross-contract interactions and...

Access Control in Cairo Access control defines who can call specific functions or modify contract behavior. This article explains how Cairo implements access control using the macro. A Review of...

Cairo Components Part 1 Components in Cairo behave like abstract contracts in Solidity. They can define and work with storage, events, and functions, but they can’t be deployed on their own. The...

Introduction to the Cairo Language Cairo is a programming language designed for provable, verifiable computation, particularly within the context of zero-knowledge systems like Starknet, a Layer 2...

Structure of a Basic Contract This article shows how to build a deployable Cairo contract for Starknet. Starting from a simple sketch, we will gradually add features to build a working contract...

Cairo Storage Variable Types In Starknet, Contract Storage is the persistent memory where your smart contract's state lives. Unlike variables declared inside a function which disappear after...

Integers in Cairo Cairo doesn’t offer the full range of integer sizes found in Solidity. While Solidity provides integer types for every multiple of 8 bits up to 256, Cairo supports only the...