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What Is Harmony (ONE)?

Updated: Jul 12, 2022

Harmony is a layer-1 blockchain using sharding and Effective Proof of Stake to achieve scalability, security, and decentralization. The network was launched in 2019 and features trustless cross-chain bridges and four shards, which process transactions in parallel. Effective Proof of Stake encourages decentralization of validators, and sharding shares the network's load among validators, delegators, and users.

Its native token ONE is used for transaction fees, governance, and staking. You can purchase ONE on Binance with a credit or debit card or trade it for another cryptocurrency. Once purchased, you can store ONE on EVM-compatible wallets like MetaMask and Binance Chain Wallet.


Exploring different altcoin projects can be a good idea if you're looking for new opportunities or crypto use cases. You might have already noticed the Harmony network or heard about it in the crypto media. To help you understand more about the project, we've outlined its background, key points, and some ways you can get involved.

What is the Harmony blockchain?

Harmony is an Effective Proof of Stake (EPoS) blockchain founded in 2018 by Stephen Tse with a mainnet launch in 2019. Like most post-Ethereum networks, it claims to solve the blockchain trilemma of decentralization, scalability, and security. Harmony's answer to the problem is sharding and its Effective Proof of Stake consensus mechanism.

Another key Harmony platform feature is its Cross-Chain Finance model. The popularity of cross-chain and multi-chain capabilities has increased dramatically, and Harmony caters to this. The blockchain offers bridging services between BNB Smart Chain (BNB), Ethereum (ETH), Bitcoin (BTC), and other networks. Harmony completed its 2019 IEO via Binance Launchpad. Harmony's main vision for scaling Web3 relies on zero-knowledge proofs and Decentralized Autonomous Organizations (DAOs). How does sharding in Harmony work?

One of Harmony's keys to providing security, scalability, and decentralization is sharding. The Harmony sharding splits the network into four sections that work in parallel. Users can choose the shard they want, which distributes the network's workload. Validation, transactions, block creation, and staking are all done separately on each shard. Sharding is beneficial for Harmony because:

1. A validator doesn't need to maintain a full copy of the entire blockchain's transaction history. 2. Validators are randomly assigned to shards to prevent hostile shard takeovers. After every Epoch, validators will likely move to a new shard, and leaders rotate. Harmony currently has a limit of 250 validators slots per shard known as BLS Keys. If needed, the number of shards and validators can increase to meet network demand in the future. Shard 0 is the Beacon Chain and acts as an information relay between shards 1, 2, and 3. No matter the shard used, transaction times will be roughly two seconds.

Currently, most activity takes place on the Beacon Chain. Full cross-shard implementation isn't yet fully developed but is on the roadmap. In the future, cross-shard communication will allow for smart contracts to operate across shards by transmitting messages between nodes directly. How does Effective Proof of Stake work?

Effective Proof of Stake (EPoS) is similar to the standard Proof of Stake (PoS) validator and delegator model. Validators stake ONE (Harmony's native token) to run a node and possibly process transactions through an election process. Delegators stake their ONE behind a validator in return for a percentage of future block rewards and transaction fees. Once elected and assigned a shard, the validator creates blocks and shares its rewards with delegators. EPoS’s reward distribution is what makes it different. Most PoS systems consolidate rewards and power behind a small number of validators. The more you stake, the more you earn and validate. In contrast, EPoS reduces rewards and penalizes validators who stake too much in a single node. Nodes with smaller stakes actually receive more favorable rewards in relation to their size, encouraging large validators to decentralize. This system also helps avoid single points of failure.

Besides offering a secure method for validating transactions, EPoS provides low gas fees. This makes it an attractive alternative to Ethereum's high gas fees or Bitcoin's scalability issues with Proof of Work (PoW). What is ONE?

The Harmony protocol's native token ONE is used for: 1. Paying network transaction fees. 2. Staking as a delegator or validator in return for block rewards. 3. Taking part in Harmony's open governance mechanism. Harmony provides a constant reward to validators of 441 million ONE annually. Transaction fees are burned with an end goal of creating a net-zero state, offsetting the ONE provided for block rewards. Closing thoughts

Whether you're an investor, DeFi DApp user, or staker, Harmony has a solid ecosystem to explore and get involved with. Even at its current roadmap stage, there’s a lot to use and discover. With more cross-shard capabilities coming in the future, make sure to keep up to date with Harmony’s progress on their website.

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