Harmony is an open and fast blockchain. Our mainnet runs Ethereum applications with 2-second transaction finality and 100 times lower fees.
Harmony’s secure bridges offer cross-chain asset transfers with Ethereum, Binance and other chains.
Harmony serves as a platform for creators to connect with their community. Try our showcase below – an NFT marketplace with collectibles from hundreds of artists.
Harmony has transcended the blockchain trilemma by bringing the best research to production. Sharding is proven to scale blockchains without compromising security and decentralization.
We divide not only our network nodes but also the blockchain states into shards, scaling linearly in all three aspects of machines, transactions and storage.
To prevent single shard attacks, we must have a sufficiently large number of nodes per shard and cryptographic randomness to re-shard regularly. Each shard has 250 nodes for strong security guarantee against Byzantine behaviors. We use Verifiable Delay Function (VDF) for unbiasable and unpredictable shard membership.
Harmony has innovated on the battle-tested Practical Byzantine Fault Tolerance (PBFT) for fast consensus of block transactions. Our Fast BFT (FBFT) leads to low transaction fees and 1-block-time finality in Harmony Mainnet.
We use Boneh–Lynn–Shacham (BLS) constant-sized signatures to commit blocks in a single round of consensus messages. We achieve 2-second block time with view changes in production against adversarial or unavailable leaders.
Harmony Mainnet was launched in June 2019. Our network has produced 30M+ blocks with 450k+ transactions in publicly traded, native ONE tokens.
Harmony has designed a novel Proof-of-Stake (PoS) mechanism for network security and economics. Our Effective Proof-of-Stake (EPoS) reduces centralization and distributes rewards fairly to thousands of validators.
Our staking mechanism supports delegation and reward compounding. To support 100% uptime but fully open participation, EPoS slashes validators who double-sign and it penalizes elected but unavailable nodes.
Harmony Economics Model caps the annual issuance at 441 million tokens (about 3% rate in long term). Our model gives validators a simple and predictable return. All transaction fees are burnt to offset the issuance, naturally leading to zero inflation when our network usage becomes high.
Interoperability with On-Chain Bridges and Wallets
Harmony has been building a scalable blockchain for three years. In this talk, we share our vision of interoperability and our focus on adoption through on-chain wallets.
Harmony’s 2021 roadmap is “Scaling Cross-Chain Finance”. With our mainnet launched in 2019, we are now ready for scaling DeFi and NFT applications across Ethereum and other chains.
Harmony’s Strategy and Architecture
Harmony in 2021 will focus on adoption through developers and partners. We will continue to strengthen our network features, to lead industry in our cross-chain architecture, and to engage broad ecosystem to build with us.
There will be explosive growth and new applications this year in blockchains — Harmony is ready to be leading a part of this global fintech revolution.
Crazy.ONEs, DAOs and ONE Love Round 2, May Update
Crazy.ONE launched on May 11th. The community can now get a personalized subdomain that is both an NFT and can be linked to their ONE wallet.
The Validator DAO was announced. Elections for the initial DAO council took place and we are excited to welcome the winners to the DAO council.
Gitcoin ONE Love: Round 2 kicked off. with over $300,000 in rewards.
Roadmap on Interoperability at Ethereal Summit
Our talk at Ethereal Summit, covering roadmap on social wallets for adoption, and cross-chain NFTs with digital identity. We announced $10m Gitcoin bounties and 10 community DAO.
Cross-Chain Applications on Ethereum and Harmony
We share a tutorial on how to easily port a dApp from Ethereum to Harmony. We are fully compatible with Ethereum tools — Metamask, Web3.js, Ether.js, Truffle and Remix.
REIMAGINE 2021 - Community Growth in Blockchain
We sit down with MouseBelt at the REIMAGINE 2021 conference to talk about the importance of communities, Harmony's product-market fit, and building interoperable decentralized applications.
Cross-Chain Applications on Ethereum and Harmony
We share a tutorial on how to easily port a dApp from Ethereum to Harmony. We are full compatibility with Ethereum tools — Metamask, Web3.js, Ether.js, Truffle, Remix.
DeFi 101: Interoperability, Bitcoin, Ethereum, Top Tools & Teams
DeFi can appear a little intimidating to get started with. We've put together a series of films that will gently place you into the world of DeFi. It is up to you to take the leap of faith.
Harmony launches on Binance US feat. Simon Wan
Harmony ONE launches on Binance.US to users based in the United States. In this film, we celebrated great American pioneers and the progress of technology.
Harmony’s bridges can connect any Proof-of-Work and Proof-of-Stake chains. Our FlyClient architecture are fully trustless and highly gas-efficient. Currently, our bridges for Ethereum and Binance Smart Chain secure tens of millions cross-chain assets.
Developers simply change Chain ID and enjoy faster EVM executions identical at the bytecode level. They can use their familiar and standard Web3 tooling to easily migrate to Harmony.
What about users? They can continue to use MetaMask or Ledger — but now pay minimal fees. Any Ethereum wallets or portals can work on Harmony without code changes or new installs — we are fully compatible for both transaction messages and execution environments.
Cross-Chain Uniswap & Whitepaper, 2-Second Finality
Coinbase Rosetta Integration, Gitcoin Hackathon
Ethereum Layer-2 Endpoints: Web3.js, MetaMask, Wallets
Trustless Bridge with Light Client, Fast State Sync
Decentralized Voting Power, Binance Bridge, Domain Name
SushiSwap, NFT Marketplace, $10m Bounties & 10 DAO
On-chain Wallet, NFT as Digital Identity, Bitcoin Bridge
1-Second Finality, Cross-Chain API, On-Chain Governance