import { PortalTransactionRequest, PortalTransactionResponse, StatusCheckResponse } from "./types";
/**
 * Creates a new payment transaction via the Nass Portal.
 * Merchants can initiate transactions once authenticated. [cite: 11]
 * @param baseUrl The base URL for the Nass Payment Gateway API (Portal).
 * @param accessToken The access token obtained from authentication.
 * @param transactionDetails Details of the transaction to initiate.
 * @returns A Promise that resolves to the transaction response containing the redirection URL.
 * @throws {Error} If the transaction initiation fails.
 */
export declare function initiatePortalTransaction(baseUrl: string, accessToken: string, transactionDetails: PortalTransactionRequest): Promise<PortalTransactionResponse>;
/**
 * Checks the status of a transaction initiated via the Nass Portal.
 * Merchants can check the status of a transaction within 24 hours of its initiation. [cite: 23]
 * @param baseUrl The base URL for the Nass Payment Gateway API (Portal).
 * @param accessToken The access token obtained from authentication.
 * @param orderId The unique order identifier.
 * @returns A Promise that resolves to the transaction status response.
 * @throws {Error} If checking the status fails.
 */
export declare function checkPortalStatus(baseUrl: string, accessToken: string, orderId: string): Promise<StatusCheckResponse>;