Merkle Patricia Trie
Structure de données hybride dans Ethereum combinant arbres de Merkle et Patricia tries.
Combine un arbre de Merkle (pour l'intégrité) et un Patricia Trie (pour les recherches). Permet à Ethereum de stocker l'état global (soldes, code) de manière inviolable. Chaque en-tête de bloc contient le hachage racine.
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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❓ Questions fréquentes
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.
📚 Sources
2. Ethereum