onflow

Reference implementation of the Flow network in Go. Layer 1 proof-of-stake protocol built for consumer apps, AI Agents, and DeFi at scale

Cadence: the resource-oriented smart contract programming language of the Flow network. Capability-based security, type safety, and move semantics

The non-fungible token standard for the Flow network. Resource-oriented NFT contracts in Cadence, with built-in metadata views and royalties

Kitty Items: CryptoKitties Sample App

Flow is a Layer 1 proof-of-stake blockchain built for consumer applications, AI Agents, and DeFi at scale. Repo hub for the Flow network

FCL (Flow Client Library) in TypeScript and JavaScript. Connect Flow dApps to wallets, send transactions, and read on-chain data from the browser

Go SDK for the Flow network. Build backend services that send transactions, listen to events, and manage accounts on Flow

Flow CLI. Deploy contracts, run transactions, manage accounts, and run a local Flow emulator. The primary tool for building on Flow

The fungible token standard for the Flow network. Resource-oriented FT contracts in Cadence, with safe transfer and capability-based control

Flow Playground. Browser-based IDE for writing, compiling, and testing Cadence smart contracts directly in a browser

NFT Storefront V2. Cadence marketplace contract for the Flow network with royalties and cross-marketplace composability

Cadence core contracts of the Flow network. Staking, delegation, epochs, service account, and FLOW token. The protocol contracts of Flow

The Flow Emulator. Lightweight local Flow network for development and testing. Pair with Flow CLI and FCL for the full local dev loop

Freshmint. TypeScript toolkit for minting NFTs on the Flow network. Batch minting, metadata management, and IPFS pinning workflows

FCL Dev Wallet. Local-only Flow wallet for development against the Flow Emulator. Used alongside FCL and Flow CLI

VS Code extension for Cadence on the Flow network. Syntax highlighting, diagnostics, and language server for Cadence smart contracts

Flow Improvement Proposal (FLIP) Fest. Backlog of tasks for contributors to ship against Flow FLIPs and community bounties

Atree. Go library of scalable, persistent arrays and ordered maps used by the Cadence runtime on the Flow network

Flow Yield Vaults. Cadence contracts for automated DeFi vaults in Flow Credit Markets on the Flow network.

Decentralized lending and borrowing protocol on Flow. Token-agnostic Cadence smart contracts (FlowALPv0) operating over any FungibleToken.Vault, with DeFi Actions composability, position management, interest accrual, and health monitoring.

[DEPRECATED] On-chain registry of Flow NFT collections conforming to the NFT Metadata Standard, enabling dApps, wallets and marketplaces to discover interoperable collections. Replaced by fixes-world/token-list.

Developer tools for Cadence

A REST API to create and manage Flow accounts

An example Flow App to demonstrate walletless onboarding and promote composable, secure, and smooth UX for on-chain games without the need for a traditional backend.

Flow JVM SDK

Create a monster on Flow

Telegram integration quickstarts for the Flow network. Starter templates for Telegram mini-apps and bots with walletless onboarding for consumer distribution.

Flow SDK for Unity - build Unity games on the Flow blockchain

The home of the Cadence website

Flow Developer Portal. Discover the developer ecosystem and master the Flow blockchain