6 mins
(25 blocks)
(25 blocks)
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.
The Defiant: What's up with $YFI and yEarn?
yEarn.finance or $YFI was the big story of the week in DeFi as it soared from $0 to over $2300 in 24 hours. Is this just a bubble or is there something more substantial going on?
Harmony + BUSD – Payment Solutions for Cross-Border Finance
Adding Binance’s USD stablecoin is the first major step towards our vision of enabling cross-border finance on Harmony.
The Blockchain Trilemma: Explained (with balloons)
The Blockchain Trilemma has been elevated to the level of the Holy Grail in recent years as projects compete to 'solve' the problem.
5-Second Finality, BUSD & Rupiah Token, July Update
We achieved 5-second transaction finality on mainnet. Our team launched the official Harmony 1wallet with HRC20 support.
Our team is building cross-chain bridges for Binance and Rupiah stablecoins. We also published 3 DeFi videos with Cami Russo at Defiant News.
Ethereum 3.0? “Scaling Cryptography in Blockchain”
Ready for Ethereum 3.0? Our CEO presents cryptography already in use on blockchain mainnets.
We survey the latest usage metrics, competitive landscape and why cryptography is the 1000x magic for building open platforms.
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.
Binance IEO, Quidd Acquisition, Shanghai Keynote
1000-Node Mainnet, Effective
PoS, 3000 Pangaea Community
2020 Q1 & Q2
Token Swap, Stablecoins, HRC-721 for Branded Assets
Open Staking, BUSD Stablecoin, EPoS Mechanism
2020 Q3
Ecosystem Grants, 3-Second Finality, DeFi Middlewares
Fiat Gateways, Staking Wallets, Ethereum Bridges
Auditable Privacy, Cross-Border Finance
100% Decentralized Nodes, Community Governance
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