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# Solana Overview **Solana** is a high-performance, permissionless Layer 1 blockchain designed for fast, low-cost decentralized applications and cryptocurrency transactions. It stands out in the blockchain ecosystem for its unique approach to scalability and throughput. ## Core Technology Solana utilizes an innovative **Proof of History (PoH)** consensus mechanism combined with **Proof of Stake (PoS)**. This hybrid approach enables the network to process transactions with exceptional speed wh

A **soft fork** is a change to a blockchain’s protocol that tightens the rules governing valid blocks and transactions, but remains compatible with older software versions. ### How It Works - **Stricter Rules:** After a soft fork, some previously valid blocks or transactions become invalid under the new rules (e.g., a lower maximum block size or new script restrictions). - **Backward Compatibility:** Nodes that haven’t upgraded can still recognize and follow the new chain as long as they ignore