import type { PaymentProviderService } from '../core';
import type { ILiquidPaymentConfig, ILiquidPaymentError, ILiquidPaymentToken, IPaymentElementEventMap } from '../interfaces';
/**
 * The PaymentService class provides methods for interacting with payment functionality.
 */
export declare class PaymentService {
    private paymentProvider;
    constructor(paymentProvider: PaymentProviderService);
    /**
     * Injects a payment element using the provided configuration.
     *
     * @param config - The configuration object to be used for injecting the payment element.
     * @returns A Promise that resolves when the payment element has been successfully injected.
     * @throws If a failure occurs while injecting the payment element.
     */
    mount(config: ILiquidPaymentConfig): Promise<void>;
    /**
     * Generates a payment token.
     *
     * @return {Promise<ILiquidPaymentToken | ILiquidPaymentError>} - A promise that resolves to either a payment token or an error.
     */
    generateToken(): Promise<ILiquidPaymentToken | ILiquidPaymentError>;
    /**
     * Subscribes a handler function to a specific event type in the payment element.
     *
     * @param eventType - The type of event to subscribe to. Must be one of the keys in IPaymentElementEventMap.
     * @param handler - The handler function to be called when the specified event occurs.
     * @return void
     */
    subscribe<K extends keyof IPaymentElementEventMap>(eventType: K, handler: (event: IPaymentElementEventMap[K]) => void): void;
    /**
     * Unsubscribes a handler function from a specific event type for the payment element.
     *
     * @param eventType - The event type to unsubscribe from.
     * @param handler - Optional. The handler function to unsubscribe. If provided, only the specific handler will be unsubscribed. If not provided, all handlers for the event type will be unsubscribed.
     * @return void
     */
    unsubscribe<K extends keyof IPaymentElementEventMap>(eventType: K, handler?: (event: IPaymentElementEventMap[K]) => void): void;
    /**
     * Collapses the payment element if it has been initialized.
     * Throws an error if the payment element has not been initialized.
     *
     * @return {void}
     * @throws {Error} Will throw an error if the payment element has not been initialized.
     */
    collapse: () => void;
    /**
     * Unmounts the payment element from the DOM.
     * Throws an error if the payment element has not been initialized.
     *
     * @return {void}
     * @throws {Error} Will throw an error if the payment element has not been initialized.
     */
    unmount: () => void;
    /**
     * Destroys the payment element if it has been initialized.
     *
     * @return {void} No return value.
     * @throws {Error} Will throw an error if the payment element has not been initialized.
     */
    destroy: () => void;
}