/// <reference types="node" />
import { ReadAllStorage, ReadGetAllStorage, ReadMetadataStorage, ReadStorage } from '@neo-one/node-core-esnext-esm';
import { LevelUp } from 'levelup';
import { Observable } from 'rxjs';
declare type SerializeKey<Key> = (key: Key) => string;
export declare function createTryGet<Key, Value>({ get, }: {
    readonly get: (key: Key) => Promise<Value>;
}): (key: Key) => Promise<Value | undefined>;
export declare function createTryGetLatest<Key, Value>({ db, latestKey, deserializeResult, get, }: {
    readonly db: LevelUp;
    readonly latestKey: string;
    readonly deserializeResult: (latestResult: Buffer) => Key;
    readonly get: (key: Key) => Promise<Value>;
}): () => Promise<Value | undefined>;
export declare function createReadStorage<Key, Value>({ db, serializeKey, deserializeValue, }: {
    readonly db: LevelUp;
    readonly serializeKey: SerializeKey<Key>;
    readonly deserializeValue: (value: Buffer) => Value;
}): ReadStorage<Key, Value>;
export declare function createAll$<Value>({ db, minKey, maxKey, deserializeValue, }: {
    readonly db: LevelUp;
    readonly minKey: string;
    readonly maxKey: string;
    readonly deserializeValue: (value: Buffer) => Value;
}): Observable<Value>;
export declare function createReadAllStorage<Key, Value>({ db, serializeKey, minKey, maxKey, deserializeValue, }: {
    readonly db: LevelUp;
    readonly serializeKey: SerializeKey<Key>;
    readonly minKey: string;
    readonly maxKey: string;
    readonly deserializeValue: (value: Buffer) => Value;
}): ReadAllStorage<Key, Value>;
export declare function createReadGetAllStorage<Key, Keys, Value>({ db, serializeKey, getMinKey, getMaxKey, deserializeValue, }: {
    readonly db: LevelUp;
    readonly serializeKey: SerializeKey<Key>;
    readonly getMinKey: (keys: Keys) => string;
    readonly getMaxKey: (keys: Keys) => string;
    readonly deserializeValue: (value: Buffer) => Value;
}): ReadGetAllStorage<Key, Keys, Value>;
export declare function createTryGetMetadata<Value>({ get, }: {
    readonly get: () => Promise<Value>;
}): () => Promise<Value | undefined>;
export declare function createReadMetadataStorage<Value>({ db, key, deserializeValue, }: {
    readonly db: LevelUp;
    readonly key: string;
    readonly deserializeValue: (value: Buffer) => Value;
}): ReadMetadataStorage<Value>;
export {};