Merkle Patricia Trie
Hybrydowa struktura danych w Ethereum łącząca drzewa Merkle i Patricia tries.
Łączy drzewo Merkle (dla integralności) i Patricia Trie (dla wyszukiwania). Pozwala Ethereum przechowywać stan globalny (salda, kod) w sposób odporny na manipulacje. Każdy nagłówek bloku zawiera hash korzenia.
graph LR
Center["Merkle Patricia Trie"]:::main
Rel_ethereum["ethereum"]:::related -.-> Center
click Rel_ethereum "/terms/ethereum"
Rel_merkle_tree["merkle-tree"]:::related -.-> Center
click Rel_merkle_tree "/terms/merkle-tree"
Rel_data_structure["data-structure"]:::related -.-> Center
click Rel_data_structure "/terms/data-structure"
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classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
classDef related fill:#0f172a,stroke:#8b5cf6,stroke-dasharray: 5 5,color:#94a3b8,rx:5,ry:5;
linkStyle default stroke:#4b5563,stroke-width:2px;
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❓ Częste pytania
Why does Ethereum use this instead of a regular Merkle Tree?
Because Ethereum's state changes constantly, and a Patricia Trie is more efficient for updating and looking up specific keys.
Is this different from a Merkle Tree?
Yes, it's a hybrid. It adds the 'path' compression of Patricia Tries to standard Merkle Trees.
Where is it stored?
It is stored in Ethereum's LevelDB database, with the root hash included in every block header.
📚 Źródła
2. Ethereum