import { Engine, Step } from './engine';
export declare class Verifier extends Engine<VerifyProgress> {
    private nodeVersion;
    private npmVersion;
    verify(packageName: string, version: string): Promise<boolean>;
    private registry;
    private checkout;
    private pack;
    private compare;
    private npmci;
}
export declare type VerifyProgress = {
    registry: Step;
    repo: Step;
    gitHead: Step;
    checkout: Step;
    install: Step;
    pack: Step;
    compare: Step;
};