/**
 * Abstract class {BasePaymentProvider} is the base class for all payment providers.
 *
 * Payment providers are responsible for providing the concrete implementation of the
 * payment provider methods.
 *
 * This class provides the following methods that can be overridden by the concrete
 * implementation classes:
 *
 * - {initSDK}: Initializes the SDK for the payment provider.
 * - {initPaymentIntent}: Initializes the payment intent for the payment provider.
 * - {requestToken}: Requests a token from the payment provider.
 * - {requestPayment}: Requests a payment from the payment provider.
 *
 * @abstract
 * @category Payment Provider
 */
export declare abstract class BasePaymentProvider {
    /**
     * Initializes the SDK for the given payment provider.
     *
     * @protected
     * @return {boolean} True if the SDK was initialized successfully, false otherwise.
     */
    protected initSDK(): boolean;
}