@ethereumjs/util / MapDB
| Name | Type |
|---|---|
TKey |
extends Uint8Array | string | number |
TValue |
extends Uint8Array | string | DBObject |
DB<TKey,TValue>
• new MapDB<TKey, TValue>(database?)
| Name | Type |
|---|---|
TKey |
extends string | number | Uint8Array |
TValue |
extends string | Uint8Array | DBObject |
| Name | Type |
|---|---|
database? |
Map<TKey, TValue> |
• _database: Map<TKey, TValue>
▸ batch(opStack): Promise<void>
Performs a batch operation on db.
| Name | Type | Description |
|---|---|---|
opStack |
BatchDBOp<TKey, TValue>[] |
A stack of levelup operations |
Promise<void>
▸ del(key): Promise<void>
Removes a raw value in the underlying db.
| Name | Type |
|---|---|
key |
TKey |
Promise<void>
▸ get(key): Promise<undefined | TValue>
Retrieves a raw value from db.
| Name | Type |
|---|---|
key |
TKey |
Promise<undefined | TValue>
A Promise that resolves to Uint8Array if a value is found or undefined if no value is found.
▸ open(): Promise<void>
Opens the database -- if applicable
Promise<void>
▸ put(key, val): Promise<void>
Writes a value directly to db.
| Name | Type | Description |
|---|---|---|
key |
TKey |
The key as a TValue |
val |
TValue |
- |
Promise<void>
▸ shallowCopy(): DB<TKey, TValue>
Note that the returned shallow copy will share the underlying database with the original
DB<TKey, TValue>
DB