ethereumjs-monorepo

@ethereumjs/mpt

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@ethereumjs/mpt / MPTOpts

Interface: MPTOpts

Defined in: packages/mpt/src/types.ts:47

Properties

cacheSize?

optional cacheSize: number

Defined in: packages/mpt/src/types.ts:106

LRU cache for trie nodes to allow for faster node retrieval.

Default: 0 (deactivated)

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common?

optional common: CommonInterface

Defined in: packages/mpt/src/types.ts:111

@ethereumjs/common Common instance (an alternative to passing in a customHashingFunction)

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db?

optional db: DB<string, string | Uint8Array<ArrayBufferLike>>

Defined in: packages/mpt/src/types.ts:51

A database instance.

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keyPrefix?

optional keyPrefix: Uint8Array<ArrayBufferLike>

Defined in: packages/mpt/src/types.ts:83

Add a prefix to the trie node keys

(potential performance benefits if multiple tries are stored within the same DB, e.g. all storage tries being stored in the outer account state DB)

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root?

optional root: Uint8Array<ArrayBufferLike>

Defined in: packages/mpt/src/types.ts:56

A Uint8Array for the root of a previously stored trie

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useKeyHashing?

optional useKeyHashing: boolean

Defined in: packages/mpt/src/types.ts:70

Create as a secure MerklePatriciaTrie where the keys are automatically hashed using the keccak_256 hash function or alternatively the custom hash function provided. Default: false

This is the flavor of the MerklePatriciaTrie which is used in production Ethereum networks like Ethereum Mainnet.

Note: This functionality has been refactored along the v5 release and was before provided as a separate inherited class SecureTrie. Just replace with Trie instantiation with useKeyHashing set to true.

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useKeyHashingFunction?

optional useKeyHashingFunction: HashKeysFunction

Defined in: packages/mpt/src/types.ts:75

Hash function used for hashing trie node and securing key.

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useNodePruning?

optional useNodePruning: boolean

Defined in: packages/mpt/src/types.ts:99

Flag to prune the trie. When set to true, each time a value is overridden, unreachable nodes will be pruned (deleted) from the trie

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useRootPersistence?

optional useRootPersistence: boolean

Defined in: packages/mpt/src/types.ts:93

Store the root inside the database after every write operation

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valueEncoding?

optional valueEncoding: ValueEncoding

Defined in: packages/mpt/src/types.ts:88

ValueEncoding of the database (the values which are put/get in the db are of this type). Defaults to string