import type { ResolvedPayWayConfig } from '../config.js';
import type { HttpClient } from '../utils/http.js';
import type { PurchaseParams, PurchaseResponse } from '../types/checkout.js';
/**
 * Purchase API - handles payment transactions
 */
export declare class PurchaseAPI {
    private config;
    private http;
    constructor(config: ResolvedPayWayConfig, http: HttpClient);
    /**
     * Create a purchase transaction
     *
     * Response type depends on payment_option:
     * - HTML string for: cards, abapay_khqr, alipay, wechat, google_pay, or undefined
     * - JSON object for: abapay_khqr_deeplink (contains qr_string, abapay_deeplink, checkout_qr_url)
     *
     * @param params - Purchase parameters
     * @returns HTML string (checkout page) or JSON object (deeplink data)
     *
     * @example HTML Response (default)
     * ```typescript
     * const checkoutHtml = await client.purchase.create({
     *   amount: 10.00,
     *   tran_id: 'ORDER-123',
     *   email: 'customer@example.com',
     *   return_url: 'https://yoursite.com/payment/callback'
     * });
     *
     * return new Response(checkoutHtml, {
     *   headers: { 'Content-Type': 'text/html' }
     * });
     * ```
     *
     * @example JSON Response (abapay_khqr_deeplink)
     * ```typescript
     * const deeplinkData = await client.purchase.create({
     *   amount: 10.00,
     *   tran_id: 'ORDER-123',
     *   payment_option: 'abapay_khqr_deeplink',
     *   email: 'customer@example.com'
     * });
     *
     * // Returns: { qr_string, abapay_deeplink, checkout_qr_url }
     * return Response.json(deeplinkData);
     * ```
     */
    create(params: PurchaseParams): Promise<PurchaseResponse>;
    /**
     * Build hash string for purchase endpoint
     * Field order based on ABA PayWay documentation
     */
    private buildPurchaseHashString;
}
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