/**
 * Hash Generation Utilities
 */
/**
 * Generate current timestamp in PayWay format (YYYYMMDDHHmmss)
 * @returns UTC timestamp string
 * @example
 * const timestamp = generateReqTime();
 * console.log(timestamp); // "20250213084236"
 */
export declare function generateReqTime(): string;
/**
 * Generate unique transaction ID
 * @returns Transaction ID based on current timestamp in milliseconds
 * @example
 * const tranId = generateTransactionId();
 * console.log(tranId); // "1739427769300"
 */
export declare function generateTransactionId(): string;
/**
 * Generate HMAC SHA-512 hash
 * @param data - Data to hash
 * @param apiKey - API key for HMAC
 * @returns Base64 encoded hash
 * @throws {Error} If API key is not provided
 * @example
 * const hash = generateHash("20250213084236ec00000217394277693", "your-api-key");
 */
export declare function generateHash(data: string, apiKey: string): string;
/**
 * Generate hash for purchase request
 * Concatenates all fields in the specific order required by PayWay API
 *
 * @param params - Purchase request parameters
 * @param apiKey - API key for HMAC
 * @returns Base64 encoded hash
 */
export declare function generatePurchaseHash(params: {
    req_time: string;
    merchant_id: string;
    tran_id: string;
    amount: number | string;
    items?: string;
    shipping?: number | string;
    firstname?: string;
    lastname?: string;
    email?: string;
    phone?: string;
    type?: string;
    payment_option?: string;
    return_url?: string;
    cancel_url?: string;
    continue_success_url?: string;
    return_deeplink?: string;
    currency?: string;
    custom_fields?: string;
    return_params?: string;
    payout?: string;
    lifetime?: number | string;
    additional_params?: string;
    google_pay_token?: string;
    skip_success_page?: number | string;
}, apiKey: string): string;
/**
 * Generate hash for QR request
 * According to PayWay API documentation, the hash should include these fields in order:
 * req_time, merchant_id, tran_id, amount, items, firstname, lastname, email, phone,
 * purchase_type, payment_option, callback_url, return_deeplink, currency, custom_fields,
 * return_params, payout, lifetime, qr_image_template
 *
 * @param params - QR request parameters
 * @param apiKey - API key for HMAC
 * @returns Base64 encoded hash
 */
export declare function generateQRHash(params: {
    req_time: string;
    merchant_id: string;
    tran_id: string;
    amount: number | string;
    items?: string;
    first_name?: string;
    last_name?: string;
    email?: string;
    phone?: string;
    purchase_type?: string;
    payment_option: string;
    callback_url?: string;
    return_deeplink?: string;
    currency?: string;
    custom_fields?: string;
    return_params?: string;
    payout?: string;
    lifetime: number | string;
    qr_image_template: string;
}, apiKey: string): string;
/**
 * Generate hash for token purchase request
 * Hash includes: req_time, merchant_id, tran_id, amount, items, shipping, ctid, pwt,
 * firstname, lastname, email, phone, type, return_url, currency, custom_fields,
 * return_params, payout
 *
 * @param params - Token purchase request parameters
 * @param apiKey - API key for HMAC
 * @returns Base64 encoded hash
 */
export declare function generateTokenPurchaseHash(params: {
    req_time: string;
    merchant_id: string;
    tran_id: string;
    amount: number | string;
    items?: string;
    shipping?: number | string;
    ctid?: string | null;
    pwt?: string | null;
    firstname?: string;
    lastname?: string;
    email?: string;
    phone?: string;
    type?: string;
    return_url?: string;
    currency?: string;
    custom_fields?: string;
    return_params?: string;
    payout?: string;
}, apiKey: string): string;