Harmony is an open and fast blockchain. Our mainnet runs Ethereum applications with 2-second transaction finality and 100 times lower fees.
Harmony is your open platform for assets, collectibles, identity, governance. Our secure bridges offer cross-chain asset transfers with Ethereum, Binance and 3 other chains.
Harmony’s bridges can connect any Proof-of-Work and Proof-of-Stake chains. Our FlyClient architecture is 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.
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.
$1M Hackathon & DAO on Building Bridges
In this article, we share our strategy on our hackathon and DAO.
Harmony is building bridges to scale applications across Ethereum, Binance, Terra, Polkadot, Bitcoin and other chains.
Our key innovation is uniform scaling — Harmony’s sharding mainnet achieves 2-second transaction finality and over $100M cross-chain assets.
$13M Grants & Bounties on Cross-Chain NFT for Adoption
Harmony aims to boost consumer adoption by developing cross-chain NFT protocols, tools and services.
Here are $13M grants and bounties for building the platform, community, reputation, curation, financial, and markets of our NFT ecosystem.
We are funding projects with bounties, hackathons, investments, or full DAOs; we offer grants for launching a new product, porting an existing product from other chains, or marketing campaigns with cross-chain partners.
New Explorer, Sushi Full Stack, 2nd Birthday, August Update
SushiSwap is deploying their full suite of products and services on Harmony.
Hashkey will provide up to $10M USD in liquidity to Harmony’s growing DeFi ecosystem and investment in DeFi applications built within the Harmony ecosystem.
Upgrade to the Harmony Explorer went live this month.
We Made Cross-Chain DeFi Possible
Our AMA with Scott Melker, also known as The Wolf of All Streets on making cross-chain DeFi possible with Harmony's secure bridges with Ethereum, Binance and 3 other chains.
Tasty Trade: Bootstrapping in America
We talk with Tasty Trade, a financial network producing 8 hours of live programming every weekday, to discuss how we enable developers to build scalable cross-chain applications.
Live AMA with Crypto.com
We meet with Crypto.com for a live AMA to discuss scaling dApps. Crypto.com is a leading wallet with 10 million users in 90 supported countries.
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.
Ethereum Layer-2 Endpoints: Web3.js, MetaMask, Wallets
Trustless Bridge with Light Client Paper, Fast State Sync
Decentralized Voting Power, Binance Bridge, Domain Name
SushiSwap, NFT Marketplace, $10M Bounties & 10 DAOs
On-chain 1Wallet & DAO, Timeless Moment NFT
Cross-Chain API, $1M Hackathon, EthCC community
$300M Grants & DAOs, Cross-Chain NFT marketplace
Bitcoin/Polkadot Bridges, 1-Second Finality, fixed income