Scaling Ethereum Applications
and Cross-Chain Finance

Open Markets for Assets & Collectibles

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.

Protocol Features

Platform Strengths

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.

Open Development

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.

Open Community

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.

Founding Team

Stephen Tse
Stephen Tse has been obsessed with protocols and compilers since high school.

He reverse-engineered ICQ and X11 protocols, coded in OCaml for more than 15 years, and graduated with a doctoral degree in security protocols and compiler verification from the University of Pennsylvania.
Rongjian Lan
Rongjian Lan was a search infrastructure engineer for Play Store at Google. He published over 10 academic papers on spatio-temporal querying and map-based visualization.

He started researching decentralized protocols and sharding in early 2017.
Sahil Dewan
Sahil Dewan is a graduate of Harvard Business School, where he served as president of the blockchain and cryptocurrency club.

He founded an ed-tech startup, and was also elected country president for AIESEC India, a youth leadership organization present in more than 125 countries.
Nick White
Nick White (now in the external team) holds bachelor’s and master’s degrees in electrical engineering from Stanford University. 

As a graduate teaching assistant at Stanford, he researched artificial intelligence and applied mathematics with Prof. Bernard Widrow.

Ecosystem and Partners


Cross-Chain Interoperability

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.

Bridge & Layer-2 Features

News and Progress

“Harmony recently raised $5 million through an IEO on Binance...the vetting was
far more rigorous than the ICO process, and showed how the industry was maturing.”
"Bringing forward the product from the testnet to the real world is the actual challenge; and Team Harmony definitely possesses the talent to implement their vision."
"Harmony’s core architecture and approach are the right ones to scale blockchain protocol (state sharding and peer to peer networking)"
"Blockchains provide a secure, immutable, and transparent tech infrastructure that allow payment services with extremely low transaction costs."

Milestones and Roadmap

Cross-Chain Uniswap & Whitepaper, 2-Second Finality

Coinbase Rosetta Integration, Gitcoin Hackathon

2021 Q1          

Ethereum Layer-2 Endpoints: Web3.js, MetaMask, Wallets

Trustless Bridge with Light Client, Fast State Sync

2021 Q2

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

Be The ONE and Stay in Touch

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