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Harmony (ONE)

Harmony is an EVM-compatible, sharded Layer 1 blockchain, and ONE is its protocol-native asset used for transaction fees, staking and value transfer.

BitcoinToolkit separates CoinGecko aggregated ONE/USD data from the Binance Spot ONE/USDT market and explains ONE units, gas, account-based execution, sharding, EPoS and FBFT finality.

Snapshot:
CoinGecko - USD
Chart:
Binance Spot - ONE/USDT
Timezone:
UTC

Use this page as an educational network and market reference. It is not an executable exchange quote, validator instruction, price forecast or trading recommendation.

Check the ONE MarketUnderstand Harmony GasLearn EPoS & Sharding
Content ownership: BitcoinToolkit Editorial Team Technical references: Official Harmony protocol and developer documentation. Review approach: Technical explanations are checked against primary Harmony sources. Last content review: Data integration last tested:

Harmony Candlestick Chart

ONE/USDT · Binance Spot · UTC

Historical Only
Pair
ONE/USDT
Venue
Binance Spot
Market Type
Spot
Interval
1H
Timezone
UTC
Last Update
Aug 25, 2026 17:40:33 UTC
Interval
Range

Long ranges automatically use a compatible candle interval.

Historical Binance Spot candles are available. JavaScript is required for current-candle updates.

Recent OHLC and volume data
Time (UTC)Open (USDT)High (USDT)Low (USDT)Close (USDT)Volume (ONE)
Aug 25, 2026 17:00:00 UTC0.00 USDT0.00 USDT0.00 USDT0.00 USDT34,805,122.40 ONE
Aug 25, 2026 16:00:00 UTC0.00 USDT0.00 USDT0.00 USDT0.00 USDT27,106,537.50 ONE
Aug 25, 2026 15:00:00 UTC0.00 USDT0.00 USDT0.00 USDT0.00 USDT18,521,642.70 ONE
Aug 25, 2026 14:00:00 UTC0.00 USDT0.00 USDT0.00 USDT0.00 USDT35,300,224.30 ONE
Aug 25, 2026 13:00:00 UTC0.00 USDT0.00 USDT0.00 USDT0.00 USDT63,839,795.80 ONE

Market data: Binance Spot ONE/USDT

Charting library: TradingView Lightweight Charts

SymbolONE
NetworkHarmony
Network FamilyEVM Layer 1
Validator SelectionEffective Proof of Stake
ConsensusFast Byzantine Fault Tolerance
Fee AssetONE
Market PairONE/USDT

Harmony Network and ONE

Harmony is the sharded network, ONE is its protocol-native asset, and contract-token balances are maintained in smart-contract state.

Page subject

Harmony

Fee asset

Harmony (ONE): ONE pays transaction execution fees on Harmony.

Staking asset

Harmony (ONE): Validators and delegators use ONE in Harmony Effective Proof of Stake.

Market pair

ONE/USDT

Network family

EVM Layer 1

Network

Harmony is an EVM-compatible Layer 1 network that divides network, transaction and state processing across shards.

Role distinction

Native ONE belongs to protocol account state and pays network fees; contract-token balances belong to token-contract storage.

Harmony Accounts

Harmony uses account-based EVM state with balances, nonces, contract code and persistent contract storage.

Account-based state

Each shard maintains account state that changes when valid transactions execute.

Externally owned accounts

A private key controls an externally owned account and signs transactions.

Contract accounts

Contract accounts contain deployed EVM bytecode and execute when called.

Nonce

A sender nonce orders transactions and prevents replay on the applicable shard.

Balance

An account balance records native ONE available for transfers and gas fees.

Code execution

Harmony executes EVM-compatible bytecode against the state of the target shard.

Contract storage

Contracts maintain persistent storage after successful execution and block commitment.

ONE Units

One ONE equals 1,000,000,000 nano or 1,000,000,000,000,000,000 atto.

Unit assetONE
Native unitONE
Smallest unitatto
Fee quote unitnano
RPC unitatto
Conversion factor1 ONE = 10^18 atto; 1 nano = 10^9 atto
Decimal precision18 decimal places
Harmony (ONE)10^18 atto | 18 decimals
Nano (nano)10^9 atto | 9 decimals
Atto (atto)1 atto | 0 decimals

Wallets display ONE, fee interfaces may use nano, and raw Harmony values are represented in integer atto.

Harmony Gas and Fees

Harmony meters EVM-compatible computation in gas and charges the execution fee in native ONE.

Fee asset

ONE

Gas

Gas measures computation and storage work requested by a transaction.

Gas limit

The gas limit caps the work a transaction may consume.

Gas used

Gas used records the work consumed by execution.

Gas price

The gas price states the amount of ONE-denominated atto offered per gas unit.

Execution cost

Execution cost equals gas used multiplied by gas price and is paid in ONE.

Harmony Transactions

A Harmony transaction is created for a shard, signed, validated, propagated, executed, included in a block and finalized through FBFT.

  1. Transaction creationThe sender sets the shard, recipient, value, data, nonce and gas parameters.
  2. SigningThe sender signs the transaction with the account private key.
  3. Nonce validationNodes validate the signature, nonce, balance, shard fields and transaction rules.
  4. BroadcastThe signed transaction is submitted to a Harmony RPC endpoint for the selected shard.
  5. Node propagationValid transactions propagate among nodes serving the shard.
  6. ExecutionThe EVM applies the transaction against shard state and meters gas.
  7. Receipt generationExecution produces a receipt containing status, gas usage and logs.
  8. Block inclusionA shard committee leader proposes a block containing accepted transactions.
  9. Finality stateMore than two-thirds of committee voting power signs the block through FBFT before it is committed.

Harmony Smart Contracts

Harmony supports EVM-compatible contracts while adding shard-aware transaction behavior.

Contract accounts

Contract accounts contain deployed bytecode and have no private signing key.

Bytecode execution

Compiled EVM bytecode executes under Harmony shard and gas rules.

Storage

Contracts read and update persistent state in the shard where they execute.

Contract calls

Calls can transfer native ONE and pass encoded input to contract functions.

Token contracts

Token contracts maintain balances and allowances independently from native ONE.

Native asset and token roles

Native ONE pays protocol gas; contract tokens cannot automatically replace ONE as the fee asset.

Harmony EPoS, FBFT and Finality

Harmony uses Effective Proof of Stake to elect shard committees and Fast Byzantine Fault Tolerance to commit blocks after a supermajority vote.

Consensus model

Harmony combines Effective Proof of Stake validator election with shard-level Fast Byzantine Fault Tolerance consensus.

Validator model

Elected validator BLS keys are assigned to shard committees with voting power derived from effective stake.

Block proposal

A committee leader proposes a block and coordinates announce, prepare and commit phases.

Attestations

Committee validators verify and sign the block hash using BLS signatures during prepare and commit phases.

Finality model

A block is committed after signatures representing more than two-thirds of committee voting power are collected in the FBFT commit process.

Application limitation

Applications should use the current shard RPC result and cross-shard receipt status rather than assuming every cross-shard action completes in one local block.

How This Page Was Checked

Technical terminology and market-source labels are checked against primary documentation.

  • Harmony EPoS, sharding and FBFT terminology is checked against official documentation.
  • Protocol and market-data sources are reviewed separately.
  • ONE units and gas roles are checked against Harmony technical documentation.

Market Data Methodology

The snapshot is CoinGecko aggregated USD data. The chart is Binance Spot ONE/USDT data. Provider coverage and quote currencies differ, so displayed values can differ.

Market Snapshot Source
CoinGecko aggregated market data (USD)
Candlestick Source
Binance Spot market data
Pair
ONE/USDT
Venue
Binance Spot
Market Type
Spot
Timezone
UTC
Cache
Snapshot cache is approximately 60 seconds; historical candle cache varies by interval.
Failure Handling
Verified cache is labeled Cached or Delayed. Missing values remain unavailable.
Snapshot Status
Delayed
Chart Status
Historical Only
Report Issue
Report a market-data problem →

Known Limitations

Technical Sources

Protocol claims use official Harmony documentation. Market data retains separate provider attribution.

Harmony protocol and developer references

  1. 1Harmony Consensus
  2. 2Harmony Effective Proof of Stake
  3. 3Harmony Transactions
  4. 4Harmony Sharding
  5. 5Harmony Tokenomics and ONE Units
  6. 6What Is Harmony

Market data references

Harmony FAQ

Answers to common questions about Harmony, ONE, gas, sharding, EPoS and FBFT finality.

What is Harmony?

Harmony is an EVM-compatible Layer 1 network that shards network, transaction and state processing.

What is ONE used for?

ONE is Harmony's native asset for transaction fees, staking, delegation and value transfer.

How are Harmony gas fees paid?

Harmony meters EVM execution in gas and charges the resulting fee in native ONE.

What are atto and nano?

Atto is the smallest ONE unit and nano equals one billion atto.

How does Harmony finality work?

Harmony shard committees use FBFT and commit a block after more than two-thirds of voting power signs it.

Editorial Information

Verified technical content, reviewed sources and update history.

Published
Last Review
Data Verification
Sources
Official documentation