import { Bytes } from '@cryptoeconomicslab/primitives';
export interface PutBatchOperation {
    type: 'Put';
    key: Bytes;
    value: Bytes;
}
export interface DelBatchOperation {
    type: 'Del';
    key: Bytes;
}
export declare type BatchOperation = PutBatchOperation | DelBatchOperation;
export interface Iterator {
    next(): Promise<{
        key: Bytes;
        value: Bytes;
    } | null>;
}
export interface KeyValueStore {
    get(key: Bytes): Promise<Bytes | null>;
    put(key: Bytes, value: Bytes): Promise<void>;
    del(key: Bytes): Promise<void>;
    batch(operations: BatchOperation[]): Promise<void>;
    iter(lowerBound: Bytes, lowerBoundExclusive?: boolean): Iterator;
    bucket(key: Bytes): Promise<KeyValueStore>;
    close(): Promise<void>;
    open(): Promise<void>;
}