interface DnsChallengeClientOptions {
    signalEndpoint: string;
    nodeId: string;
    nodeToken: string;
}
export declare class DnsChallengeClient {
    private readonly endpoint;
    private readonly nodeId;
    private readonly nodeToken;
    constructor(options: DnsChallengeClientOptions);
    setChallenge(host: string, value: string): Promise<void>;
    removeChallenge(host: string, value?: string): Promise<void>;
    private postChallenge;
}
export {};