What is Solana?
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 6 min
In short
Solana is a smart contract blockchain that launched in 2020. Parallel transaction processing gives it high throughput and low fees, and it hosts exchanges, NFTs and payment apps. It has also halted several times under load, particularly in its early years.
Key points
- Combines Proof of Stake with Proof of History, a way of ordering events in time
- Parallel execution keeps the cost per transaction low
- Hosts heavily used exchanges, NFT markets, memecoins and payment apps
- Suffered several network outages from load or bugs between 2021 and 2024
Definition
A Proof of Stake smart contract blockchain that pursues high throughput through parallel execution and pre-ordered timestamps.
Solana was a response to throughput limits. Most chains process transactions one at a time, so fees rise and confirmation slows as usage grows. Solana starts from the idea that unrelated transactions can run at the same time: every transaction declares up front which accounts it will read and write, so non-conflicting ones execute in parallel.
Its other distinctive piece is Proof of History. This is not a consensus algorithm but a clock: a continuous chain of hashes that lets anyone verify that one event came after another. Because ordering is settled in advance, validators spend less time agreeing on sequence. Consensus itself is Proof of Stake, with validators staking SOL to produce blocks.
In practice the network is used for order-book and automated-market-maker exchanges, NFT minting and trading, memecoins and payment apps. Low fees suit small payments and high-frequency activity, and there have been experiments with mobile devices and stablecoin transfers.
The flip side is that performance-first design places heavy hardware demands on validators. Bot-driven transaction floods have congested the network and stopped block production on several occasions. Client rewrites and fee-market changes followed, but the outage history is a documented fact worth knowing.
Watch out for
- · The network has halted more than once; while it is down, nothing can be sent or traded
- · Running a validator requires powerful hardware, raising the barrier compared with other PoS chains
- · Creating new tokens is trivial, so fraudulent tokens circulate widely
Frequently asked questions
Why are fees so low?
Each block handles a large number of transactions and they run in parallel. When demand concentrates on one application, however, priority fees for that application rise.