Blockchain

Blockchain

A blockchain is a shared ledger maintained by many independent computers (nodes). Transactions are bundled into blocks, and each block references the previous one cryptographically. This forms a chain that cannot be altered later without detection.

What defines a blockchain

• Decentralized: No single entity controls the ledger alone.
• Tamper-resistant: Later changes would invalidate all subsequent blocks.
• Transparent: Every transaction is publicly verifiable.

Solana as a blockchain

Solana is built for high throughput. Instead of numbering transactions one by one, Solana uses Proof of History as a cryptographic clock that records the order of events. This enables very short confirmation times and low fees.