Welcome to the Flow Developer Docs

A detailed guide covering how to use the FCL (Flow Client Library) to build a serverless app that connects to Flow, using React!

Ready to jump right in? Use one of our quickstart projects: SvelteKit, NextJS, NuxtJS

The Kitty Items application is a full-featured NFT marketplace that demonstrates what a full-stack application can look like on Flow. It's designed to showcase the power of Cadence and Flow's client libraries.

The smart contracts that define the core functionality of the Flow protocol.

A demonstration (written in TypeScript) of a RESTful API that implements a simple custodial wallet service for the Flow blockchain.

The Flow CLI includes several commands to interact with Flow networks, such as querying account information, or sending transactions. It also includes the Flow Emulator.

The Flow Emulator is a lightweight tool that emulates the behaviour of the real Flow network. The emulator exposes a gRPC server that implements the Flow Access API, which is designed to have near feature parity with the real network API.

An extension for VSCode editor that integrates Cadence, the resource-oriented smart contract programming language of Flow, into Visual Studio Code. It provides features like syntax highlighting, type checking, code completion, etc.

An application that emulates Flow compatible wallets for use during local development. Click to view the project Github repository, or go to the Kitty Items project for instructions on how to use it while building your project.

FLIP Fest was conducted over 3 months with over 100 developers participating in working on issues for reward bounties provided by Flow! Check out tools, features & improvements,  and standards.

A non-exhaustive list of  Cadence contracts, scripts, transactions that exemplify best practices. These contracts are so-called foundational because they are standard interfaces that any FT or NFT contract will implement. They introduce commonly seen resources such as Vaults, Collections as well as standard events.

Learn more about Flow and Cadence by watching videos ...

Hello World on Flow
Resource Oriented Programming Paradigm
Series: Learn Cadence
Series: Build Flow apps
Flow's NFT Metadata Standard

Read articles covering Flow and Cadence ...

Get the Flow down (learning resources compilation)
Intro to Flow blockchain
Cadence at a glance
How Cadence and Flow will revolutionize smart contract programming
Taking your First Steps with Cadence
How to Create NFTs Like NBA Top Shot With Flow and IPFS
NFT School: How to build a Flow NFT pet store
Flow Zero to Jacob

A list of high-quality Cadence code to help you learn and implement your smart-contract ideas. Highlights include:

Mint an NFT
Set NFT metadata
Create an NFT marketplace
Purchase an NFT on a marketplace

A detailed guide covering how to start using the Cadence smart contract programming language. This guide also covers how to create scripts and transactions in Cadence to interact with Flow.

The language definition for Cadence, covering Cadence syntax. Complete and up-to-date with examples.

A collection of helpful best-practices for writing Cadence code, sourced from Flow contributions.

The Flow Playground is an interactive browser-based IDE for experimenting with Cadence code. It uses the Cadence language server for full type-checking and error reporting. The Playground is the fastest way to prototype your Cadence project and experiment with the language.