Harmony is a fast and secure blockchain for decentralized applications. Our production mainnet supports 4 shards of 1000 nodes, producing blocks in 5 seconds with finality.
Our Effective Proof-of-Stake (EPoS) reduces centralization while supporting stake delegation, reward compounding and double-sign slashing.
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 Random 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 5-second block time with view changes in production against adversarial or unavailable leaders.
Harmony Mainnet was launched in June 2019. Our network has produced 10M+ blocks with 20k+ 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 insurance, naturally leading to zero inflation when our network usage becomes high.
Horizon: the Harmony - Ethereum Bridge is live on Mainnet
Horizon is a digital asset bridge allowing users to move assets from Ethereum to Harmony. It is now live on mainnet and is the first piece of our cross-chain ecosystem.
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.
Community AMA on Vision and Roadmap
We host a community AMA to discuss our roadmap of building trustless bridges for broader access of users and assets across blockchains.
Bridges, Cross-Chain Roadmap & Band Integration, Sep Update
We launched the first version of the Ethereum-Harmony bridge to allow users to migrate assets from Ethereum.
Our team continues to grow our ecosystem with Sandbox and upgraded our mainnet for secure staking epoch transition.
Harmony Roadmap: Cross-Chain & Cross-Exchange Pools
We are building trustless bridges to Bitcoin, Ethereum and Binance chains for broader access of users and assets to decentralized finance.
Our product is a cross-chain exchange. Later we will be putting order books on chain for cross-exchange arbitrage and fiat cash-flow management.
Harmony $7M Grant: Cross-Border Finance & Zero-Knowledge Proofs
Our grants are to drive our platform’s mainnet utility, decentralized community, and cryptographic innovations — aligned with our 2020 roadmap on cross-border finance and auditable privacy.
We allocate 154.2M tokens per month for protocol and ecosystem development.
Harmony aims to build an open network of nodes operated and governed by a large community. This node community is called Pangaea.
Are we decentralized yet? There’s no consensus without participation. There are now 1,000 Harmony nodes – so far 320 of them run by the community – in line with thousands of Bitcoin and Ethereum nodes. Pangaea consists of volunteers and validators from more than 100 countries and most of them have never run a node before.
Token Swap, Stablecoins, HRC-721 for Branded Assets
Open Staking, BUSD Stablecoin, EPoS Mechanism
Ecosystem Grants, 5-Second Finality, DeFi Middlewares
Fiat Gateways, Staking Wallets, Ethereum Bridges
Light Clients, Trustless Bridges, Cross-Chain Uniswap
Decentralized Nodes, On-Chain Makers & Order Books
Cross-Chain Contract Calls, Cross-Exchange Arbitrage
On-Chain Governance, Fiat Liquidity Mining