Solana is a public blockchain for transferring value and running applications. Its native token, SOL, pays transaction fees and can be delegated to validators. A wallet signs transactions, validators execute their instructions and vote under Proof of Stake, while Proof of History supplies a cryptographically verifiable sequence for timing and ordering events. The design targets shared state, roughly 400-millisecond block times and very low base fees, but users still need to understand prioritization fees, storage rent and validator-dependent staking returns.
What is Solana?
Solana is a permissionless network whose ledger records ownership, balances and application state. Anyone can use a wallet to submit a signed transaction, operate a validator subject to the network’s requirements, or build an application that invokes Solana programs.
The network separates code from the data that code changes. Programs are smart-contract code compiled to Solana’s sBPF execution format; accounts hold the mutable state. This account-and-program model lets one transaction call several programs and update several accounts atomically, which is important for exchanges, lending markets, games and other composable applications.
SOL is the network’s native asset. It is used to pay transaction fees, and holders can delegate it to validators as stake. SOL’s market price, supply and staking return are separate questions from whether the network can execute a particular transaction.
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How a Solana transaction works
A transaction is a signed request to execute one or more instructions. The basic path is:
- Initiate an action in a wallet. You might enter a recipient and amount for a SOL transfer or approve an application action such as a token swap.
- The wallet builds a message. It identifies the accounts each instruction will read or write, includes the relevant program addresses and data, and attaches a recent blockhash.
- You sign the transaction. The signature authorizes the requested state changes. Never approve a transaction whose destination, spending authority or instructions you have not checked.
- The transaction is submitted to the network. Validators receive it, check the signatures and account permissions, and simulate or execute the instructions.
- Validators vote and record the result. The resulting account state is appended to the ledger through Solana’s Proof-of-Stake consensus process. Your wallet then displays the confirmed result.
A single transaction can contain multiple instructions. For example, an application interaction may create or verify an account, transfer tokens and update a market position in one atomic operation: either the transaction’s required instructions succeed together or the state changes are not committed.
Solana’s core building blocks
| Component | What it contains or does | Why it matters |
|---|---|---|
| Account | Lamports, data, an owner, an executable flag and a rent epoch, identified by a 32-byte address | Stores balances and mutable application state |
| Program | Stateless sBPF code | Defines the rules for validating and changing accounts |
| Instruction | A program address, an account list and instruction data | Requests one specific operation |
| Transaction | Signatures, a message, account addresses, a recent blockhash and compiled instructions | Bundles one or more authorized operations for atomic execution |
Because programs are stateless, an application supplies the accounts containing the state it needs. That explicit account list makes data dependencies visible to the runtime and allows unrelated work to be processed in parallel when their writable accounts do not conflict.
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What is Proof of History?
Proof of History (PoH) is a cryptographic timing and ordering mechanism, not a replacement for consensus. It produces a verifiable sequence that helps the network establish when events occurred relative to one another. Solana’s terminology documentation describes the property this way: “Like a VDF, a Proof of History can be verified in less time than it took to produce.”
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchIn practical terms, validators do not need to negotiate a fresh wall-clock timestamp for every event. A continuously generated, verifiable sequence gives them a common ordering reference. That reduces coordination overhead and helps Solana target approximately 400-millisecond block times, as stated in the network’s current DeFi documentation.
PoH does not decide which validator controls the network or make an invalid transaction valid. Signature checks, program execution and the vote-based consensus process still determine whether a proposed state transition is accepted.
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Is Solana Proof of Stake?
Yes. Solana uses Proof of Stake (PoS) for consensus. Validators process transactions, propose or receive blocks and vote on the ledger. SOL holders can delegate stake to a validator without giving that validator ownership of the delegated tokens. Stake weight raises the economic cost of changing consensus outcomes and influences which validators participate in voting and block production.
Delegation is not a risk-free savings product. Results depend on the network’s inflation, the total amount staked, the validator’s uptime and its commission. A validator can also experience operational or governance risks, so compare its commission, performance history and withdrawal process before delegating.
How much are Solana fees?
The base transaction fee is 5,000 lamports per signature, according to Solana Foundation fee documentation accessed in 2026. A transaction with multiple required signatures therefore has a base charge for each signature, rather than one universal charge regardless of signer count.
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Applications can add an optional prioritization fee based on the compute units a transaction requests. During periods of demand, paying a priority fee can make a transaction more competitive for inclusion; it is not the same as the mandatory base fee.
| Charge or requirement | How it works | When it applies |
|---|---|---|
| Base fee | 5,000 lamports per signature | Every processed transaction, based on its signatures |
| Prioritization fee | Optional fee calculated from requested compute units | When a sender chooses to improve transaction priority |
| Rent | A storage deposit associated with account data | When creating and maintaining accounts; reclaimable when the account data is closed or released under Solana’s rules |
Wallets and applications may ask you to fund a new token or program-derived account. That amount is a storage deposit, not an additional network transaction fee. If the account is later closed correctly, the rent deposit can be returned to the account designated by the closing instruction.
What is SOL used for?
Paying for network activity
SOL pays the base fee and any prioritization fee attached to a transaction. You need enough SOL in the signing wallet for the fee even when the transaction primarily moves another asset, such as a token issued on Solana.
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SOL can be delegated to a validator. The validator participates in voting, while the delegator receives whatever rewards the protocol and validator economics produce after applicable commission. Solana’s published inflation schedule starts at 8% annually, decreases by 15% year over year and approaches a 1.5% long-term rate. Those are schedule parameters, not a promised personal yield; actual returns vary with the factors above.
Using applications
SOL is used directly in transfers and can also be exchanged for assets used by applications. A wallet may need SOL for fees when you trade, lend, borrow, mint digital art or interact with a game.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What can you do on Solana?
Solana’s shared global state and atomic transaction model support several categories of applications:
- Payments and transfers: send SOL or Solana-based tokens between accounts.
- Decentralized finance: use swaps, lending markets, oracles and perpetual markets without handing custody to a central intermediary.
- Digital art and collectibles: mint, trade and display on-chain assets.
- Games: record ownership, in-game items or actions that an application can verify.
- Financial services: compose multiple instructions so a trade, collateral update or settlement completes atomically.
The roughly 400-millisecond block-time figure and sub-cent-fee description come from Solana’s current DeFi documentation; they describe the network’s design and documented operating target, not a guarantee that every application or congested period will feel identical.
How Solana compares with another blockchain
There is no single “fastest” or “cheapest” answer that captures the relevant trade-offs. Evaluate a candidate network on the dimensions that affect your use case:
| Comparison axis | Questions to ask |
|---|---|
| Consensus and security | How are validators selected, how does stake or another resource secure the ledger, and what could reverse or censor a transaction? |
| Ordering and finality | How are transactions ordered, and what confirmation state does an application treat as final? |
| Fees | What is mandatory, what is optional, and are storage deposits or account-creation costs refundable? |
| Latency and capacity | What block or slot interval is documented, and how does the network behave when demand rises? |
| State and developer model | Are code and state separated, what data must a transaction declare, and which languages and tools are supported? |
| Decentralization | How many independent validators participate, what hardware is required, and how concentrated is stake? |
| Liquidity and applications | Can you access the assets, markets, wallets and services you actually need? |
| Operational history | What does the chain’s documented outage, congestion and recovery history imply for your risk tolerance? |
Solana’s distinctive case is the combination of PoH-assisted ordering, PoS voting, explicit accounts and programs, fast documented block times and low base fees. Whether that combination is preferable depends on the application’s liquidity, reliability requirements, security assumptions and user experience.
Quick Recap
A concrete example: swapping a token
- Your wallet connects to a decentralized-exchange program and displays the proposed swap instructions.
- The transaction lists the source token account, destination token account, market accounts and the program that will execute the swap.
- You review the amounts, slippage settings, account-creation prompts and fee estimate, then sign.
- Validators verify the signature and execute the instructions. If the required checks pass, the token balances and any newly created account state are updated atomically.
- Your wallet shows the confirmed transaction and the resulting balances. If the transaction is not included, check the blockhash, account balance, application status and any prioritization-fee setting before retrying; do not blindly sign a second request that could duplicate an action.
What Solana does not guarantee
- A low base fee does not mean every application interaction is free: priority fees and account storage deposits can apply.
- Proof of History does not replace Proof of Stake or validate application logic; it supplies timing and ordering evidence.
- Staking does not guarantee a fixed annual return. Inflation, total stake, validator commission and uptime change the result.
- A short documented block interval does not remove the need to assess congestion, validator concentration, application risk or the security of the wallet you use.
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