ethereumjs-monorepo

@ethereumjs/mpt

@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)

common?

optional common: CommonInterface

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

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

db?

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

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

A database instance.

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)

root?

optional root: Uint8Array<ArrayBufferLike>

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

A Uint8Array for the root of a previously stored trie

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 keccak256 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.

useKeyHashingFunction?

optional useKeyHashingFunction: HashKeysFunction

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

Hash function used for hashing trie node and securing key.

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

useRootPersistence?

optional useRootPersistence: boolean

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

Store the root inside the database after every write operation

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