import { EkycConfig, OcrRequest, OcrResponse, LivenessRequest, LivenessResponse, FaceMatchRequest, FaceMatchResponse, EkycFlowInput, EkycFlowResult } from "./types";
/**
 * EkycService – Main class of the eKYC SDK.
 *
 * Uses the **Singleton pattern** to ensure only one instance
 * exists throughout the entire application.
 *
 * @example
 * ```typescript
 * // Initialize the SDK
 * const ekyc = EkycService.getInstance({
 *   baseUrl: 'https://ekyc-api.example.com/api/ekyc',
 *   apiKey: 'your-api-key',
 *   timeout: 30000,
 * });
 *
 * // Run the full eKYC flow
 * const result = await ekyc.startEkycFlow({
 *   documentFront: frontImageBlob,
 *   documentBack: backImageBlob,
 *   selfieImage: selfieBlob,
 * });
 *
 * console.log(result.isVerified); // true/false
 * ```
 */
export declare class EkycService {
    private static instance;
    private readonly config;
    private readonly ocrService;
    private readonly livenessService;
    private readonly faceMatchService;
    private constructor();
    /**
     * Get the singleton instance of EkycService.
     * If no instance exists, a new one will be created with the provided config.
     *
     * @param config - SDK configuration (required on first call)
     * @returns The singleton instance of EkycService
     * @throws {EkycError} When called for the first time without config
     */
    static getInstance(config?: EkycConfig): EkycService;
    /**
     * Reset the singleton instance (useful for testing or reconfiguration).
     */
    static resetInstance(): void;
    private validateConfig;
    /**
     * Extract information from ID card images (CMND/CCCD).
     * Accepts Blob, File, or base64 string inputs.
     */
    performOcr(request: OcrRequest): Promise<OcrResponse>;
    /**
     * Verify liveness from a selfie image.
     * Accepts Blob, File, or base64 string input.
     */
    checkLiveness(request: LivenessRequest): Promise<LivenessResponse>;
    /**
     * Compare a selfie with a document photo for identity verification.
     * Accepts Blob, File, or base64 string inputs.
     */
    matchFaces(request: FaceMatchRequest): Promise<FaceMatchResponse>;
    /**
     * Orchestrate the full eKYC flow: OCR → Liveness → Face Match.
     *
     * Flow:
     * 1. **OCR**: Extract document information from front/back images
     * 2. **Liveness**: Verify the selfie is from a live person
     * 3. **Face Match**: Compare the selfie with the document photo
     *
     * The flow will stop early if liveness check fails (not a live person).
     *
     * @param input - Input data for the entire flow
     * @returns Combined result including all steps + verification status
     * @throws {EkycError} When any step fails
     */
    startEkycFlow(input: EkycFlowInput): Promise<EkycFlowResult>;
}
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