An EVM-compatible blockchain shard that serves as Harmony’s primary network, offering 2-second finality, ultra-low fees, and Effective Proof-of-Stake security.
Harmony Shard 0 is the mainnet shard of the EVM-compatible Harmony blockchain (ONE), using Effective Proof-of-Stake and Fast BFT to deliver fast finality and low-cost transactions. It hosts most apps and bridges—covering DeFi, NFTs, and gaming—with ~2-second block times, typical gas price around 1 gwei (≈0.000021–0.0003 ONE per tx), and practical throughput in the tens to low hundreds TPS; activity is concentrated here for liquidity and routing.
Harmony Shard 0 stands out with ~2-second block times and deterministic finality via aggregated BLS/FBFT, while keeping fees at 1 gwei-level (fractions of a cent in ONE), compared to Ethereum’s ~12s blocks and higher gas. Its sharded L1 design and EVM compatibility provide headroom for parallel scaling, yet concentrating activity on Shard 0 standardizes liquidity, RPCs, and indexers, yielding dependable throughput in the tens–hundreds TPS for cost-sensitive DeFi, gaming, and NFT workloads.
Harmony Shard 0 uses ONE as the gas token for transaction fees. You can obtain ONE by bridging from other chains or purchasing using thirdweb Bridge.
To bridge ONE to Harmony Shard 0, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Harmony Shard 0 as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Harmony Shard 0 you can use thirdweb, which provides an easy way to build, monetize and scale your apps, games or agents. You can find detailed guides and documentation on https://portal.thirdweb.com to get started quickly.
To add Harmony Shard 0 to your wallet, you can connect your wallet and click on [Add to Wallet] button at the top of the page. Alternatively, you can add the network manually using the RPC URL and chain details and add it to your wallet's network settings.
To send ONE on Harmony Shard 0, ensure your wallet is connected to the Harmony Shard 0 network, enter the recipient's address, specify the amount of ONE to send, review the gas fee, and confirm the transaction in your wallet.