import { ISdkSettings } from './types';
export declare abstract class LeadBase {
    protected settings: ISdkSettings;
    constructor(settings: ISdkSettings);
    protected get ApiUrl(): string;
    private get storage();
    private get maxQueueSize();
    protected fetch(path: string, body: string): Promise<Response>;
    private enqueue;
    private getPendingRequests;
    private resync;
}