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State Compression · hard

90. State Compression & Concurrent Merkle Trees

Minting millions of NFTs for pennies.

1 min read2 questionsup to 50 XPtopic 90/100

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State compression writes data into a Concurrent Merkle Tree stored on-chain in an account. Changes are recorded in a changelog, and full leaf data is stored by off-chain indexers rather than expensive on-chain account storage.

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Check your understanding

1. How does Solana state compression drastically reduce storage costs?
Stores only the 32-byte Merkle root and changelog on-chain while offloading leaf data to indexersCompresses bytes with gzipDeletes old blocksStores data in RAM
2. What does the concurrency in Concurrent Merkle Trees allow?
Multiple transactions to update the tree in the same slot without root conflictsMulti-threaded miningEVM executionZero fees

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