import { Sources, Update } from './scuttlebutt.interface';
export declare abstract class AsyncModelStoreBase {
    abstract init(): Promise<void>;
    abstract get(key: string): Promise<Update | undefined>;
    abstract set(key: string, clock: Update): Promise<void>;
    abstract history(sources: Sources, isAccepted?: (update: Update) => boolean | Promise<boolean>): Promise<Update[]>;
    abstract keys(): Promise<string[]>;
    abstract toJSON(): Promise<Record<string, any>>;
}