How does Solana work?

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Solana is a proof-of-stake blockchain designed around one big goal: high throughput at low cost. Here's how the pieces fit together.

The core design

Proof of History (PoH) — this is Solana's signature innovation. Instead of just ordering transactions with timestamps, each block's producer computes a hash chain where each hash depends on the previous one. That creates a verifiable, built-in "clock" so nodes can prove how much time passed between events without actually asking each other. It lets the network agree on the order of transactions extremely fast.

Single global state machine — unlike some ecosystems that split into shards or app-chains, Solana keeps all its state in one place and lets validators process transactions in parallel. It uses a transaction scheduler that identifies non-overlapping transactions and executes them concurrently across its CPU cores.

Proof of Stake consensus — block producers (validators) are chosen based on how much SOL they've staked, and they earn rewards for producing valid blocks. The PoH clock + gossip protocol lets the network finalize in a couple of seconds.

Why it's fast and cheap

No mempool — transactions are forwarded directly to the current leader, which cuts out a whole step that slower networks rely on.
Sealevel runtime — Solana's parallel smart-contract engine lets many transactions run simultaneously on hardware (which is why "time is money" and it prizes fast hardware/GPUs).
Result: block times around 400ms and fees that are typically fractions of a cent.

What it's known for

SOL — the native token used to pay fees and to stake.
SPL tokens — Solana's token standard (the equivalent of Ethereum's ERC-20), home to a massive meme-coin ecosystem (pump.fun, Raydium pools, etc.).
Rent model — accounts pay a one-time rent to keep data on-chain, refundable when you close the account.
Trade-offs — its single-state, high-throughput design means validators need beefy hardware, and the network has had occasional congestion/outage episodes during periods of extreme activity.

This is a general explanation, not a live check. If you'd like, I can pull up SOL's current price, market cap, and 24h movement from live market data, or look at a specific Solana project/token you have in mind.