/**
 * c15t backend implementation of the consent client interface.
 * This client makes HTTP requests to the c15t consent management backend.
 *

 */
import type { ConsentManagerInterface, IdentifyUserRequestBody, IdentifyUserResponse, InitResponse, SetConsentRequestBody, SetConsentResponse } from '../client-interface';
import type { FetchOptions, ResponseContext } from '../types';
import type { C15tInternalClientOptions } from './types';
/**
 * c15t backend implementation of the consent client interface.
 * Makes HTTP requests to the c15t consent management backend.
 *
 * @remarks
 * v2.0: Subject-centric API. Use setConsent for all consent operations.
 */
export declare class C15tClient implements ConsentManagerInterface {
    /**
     * Base URL for API requests (without trailing slash)
     * @internal
     */
    private backendURL;
    /**
     * Storage configuration for offline fallback
     * @internal
     */
    private readonly storageConfig?;
    /**
     * IAB configuration for offline/fallback mode
     * @internal
     */
    private readonly iabConfig?;
    /**
     * Default headers to include with all requests
     * @internal
     */
    private headers;
    /**
     * Custom fetch implementation (if provided)
     * @internal
     */
    private customFetch?;
    /**
     * CORS mode for fetch requests
     * @internal
     */
    private corsMode;
    /**
     * Global retry configuration for fetch requests.
     * @internal
     */
    private retryConfig;
    /**
     * Fetcher context for API requests
     * @internal
     */
    private fetcherContext;
    /**
     * Creates a new c15t client instance.
     *
     * @param options - Configuration options for the client
     */
    constructor(options: C15tInternalClientOptions);
    /**
     * Checks if a consent banner should be shown.
     * If the API request fails, falls back to offline mode behavior.
     */
    init(options?: FetchOptions<InitResponse>): Promise<ResponseContext<InitResponse>>;
    /**
     * Sets consent preferences for a subject.
     * If the API request fails, falls back to offline mode behavior.
     *
     * @remarks
     * v2.0: This calls POST /subjects with a client-generated subjectId.
     */
    setConsent(options?: FetchOptions<SetConsentResponse, SetConsentRequestBody>): Promise<ResponseContext<SetConsentResponse>>;
    /**
     * Links an external user ID to a subject via PATCH /subjects/:id.
     * Saves to storage first (optimistic), then makes API call with fallback.
     *
     * @remarks
     * v2.0: Maps to PATCH /subjects/:id endpoint.
     */
    identifyUser(options: FetchOptions<IdentifyUserResponse, IdentifyUserRequestBody>): Promise<ResponseContext<IdentifyUserResponse>>;
    /**
     * Makes a custom API request to any endpoint.
     */
    $fetch<ResponseType, BodyType = unknown, QueryType = unknown>(path: string, options?: FetchOptions<ResponseType, BodyType, QueryType>): Promise<ResponseContext<ResponseType>>;
    /**
     * Check for pending consent submissions on initialization
     * @internal
     */
    private checkPendingConsentSubmissions;
    /**
     * Process pending consent submissions
     * @internal
     */
    private processPendingConsentSubmissions;
    /**
     * Check for pending identify user submissions on initialization
     * @internal
     */
    private checkPendingIdentifySubmissions;
    /**
     * Process pending identify user submissions
     * @internal
     */
    private processPendingIdentifySubmissions;
}
export type { C15tInternalClientOptions } from './types';