import type { AcmeHttpClient } from './acme.classes.http-client.js';
import type { IAcmeChallenge } from './acme.interfaces.js';
/**
 * ACME challenge operations - key authorization computation and challenge completion
 */
export declare class AcmeChallengeManager {
    private httpClient;
    private accountKeyPem;
    constructor(httpClient: AcmeHttpClient, accountKeyPem: string);
    /**
     * Compute the key authorization for a challenge.
     * For http-01: returns `token.thumbprint`
     * For dns-01: returns `base64url(sha256(token.thumbprint))`
     *
     * This is a synchronous, pure-crypto computation.
     */
    getKeyAuthorization(challenge: IAcmeChallenge): string;
    /**
     * Notify the ACME server to validate a challenge (POST {} to challenge URL)
     */
    complete(challenge: IAcmeChallenge): Promise<void>;
}