import { TransactionStartOptions } from "./interfaces/TransactionStart";
import { StartResult } from "./interfaces/StartResult";
import { TransactionResult } from "./interfaces/TransactionResult";
import { InvoiceData } from "./interfaces/InvoiceData";
export declare class PaynlError extends Error {
}
/**
 *
 * Contains the configurations for transactions.
 */
export declare class Paynl {
    private apiToken;
    private serviceId;
    private hostname;
    private verbose;
    constructor(config: {
        apiToken: string;
        serviceId: string;
        verbose?: boolean;
    });
    /**
     * Generate the url of the API to call
     */
    private getUrl;
    /**
     * Checks if the result is an error (there are many ways the api can return an error)
     */
    private isError;
    private objectToQueryString;
    /**
     * Do a post request on the API.
     */
    private post;
    startTransaction(options: TransactionStartOptions): Promise<StartResult>;
    getTransaction(transactionId: string): Promise<TransactionResult>;
    getTransactionDetails(transactionId: string): Promise<any>;
    addInvoice(invoiceData: InvoiceData): Promise<{
        referenceId: string;
    }>;
    /**
     * Request all the available payment methods and settings of the current merchant / service
     */
    getService(): Promise<any>;
}