Flow is a layer-1 blockchain built by Dapper Labs, the team behind CryptoKitties and NBA Top Shot, designed from the ground up to support mainstream NFT and gaming applications — with fast finality, low fees, and a programming model that lets developers build without worrying about gas optimization. Flow’s architecture splits the responsibilities of a typical blockchain node into four specialized roles (collection, consensus, execution, verification), allowing it to achieve throughput comparable to centralized systems without sharding. FLOW is used to pay transaction fees, stake on the network, and participate in governance. Flow became famous as the home of NBA Top Shot, which generated over $1 billion in trading volume and introduced millions of sports fans to NFTs.
How It Works
Flow’s multi-role architecture is its defining technical feature:
Four node types:
- Collection Nodes — Improve network connectivity and data availability by grouping transactions into “collections”
- Consensus Nodes — Determine the order and finality of collections (using HotStuff BFT protocol)
- “Execution Nodes — Compute the results of transactions (high hardware requirements, few nodes)
- Verification Nodes — Check execution node work (ensures correctness without requiring all nodes to execute all transactions)
Cadence smart contract language:
Flow uses Cadence, a resource-oriented programming language designed to prevent common NFT/DeFi bugs at the language level. Resources (like NFTs) can only exist in one place at a time, can’t be duplicated, and can’t be accidentally lost.
Account model:
Flow uses account-based storage (not UTXO) with accounts that have storage capacity bought with FLOW tokens.
Tokenomics
| Metric | Value |
|---|---|
| Token | FLOW |
| Max Supply | No hard cap |
| Distribution | Dapper Labs team, early investors, ecosystem fund |
| Staking Rewards | ~3-5% APY |
| Min Stake | Varies by node type |
Use Cases
- Transaction fees — All Flow transactions paid in FLOW
- Staking — Validators and delegators earn staking rewards
- NFT purchases — Base currency for Flow NFT marketplaces (NBA Top Shot, NFL All Day)
- DeFi — Emerging DeFi ecosystem on Flow
History
- Aug 2017 — Dapper Labs founded; CryptoKitties causes Ethereum congestion in Dec 2017
- 2018 — Dapper Labs begins designing separate blockchain for mainstream apps
- 2020 — Flow mainnet launches; FLOW token debut
- Feb 2021 — NBA Top Shot launches on Flow; massive public attention; $1B+ trading volume in months
- 2021 — Flow raises $250M+ from major VCs; NFL All Day, UFC Strike, and other sports licenses signed
- 2022 — Bear market; NFT volumes drop significantly; Flow ecosystem rebuilds with new protocols
- 2023-2024 — Flow 2.0 development; ecosystem expansion with new DeFi protocols and gaming projects
Common Misconceptions
“Flow is just for sports NFTs.” While sports NFTs (NBA Top Shot, NFL All Day) made Flow famous, the network hosts gaming projects, DeFi protocols, and general-purpose applications.
“Flow chose low decentralization over scalability.” Flow has fewer execution nodes than other L1s, but verification nodes provide a decentralized check on execution correctness. The trade-off is deliberate: consumer apps don’t need the same censorship resistance as financial protocols.