export declare const paymentHelper: {
    registerPaymentHandler<T extends import("./payment-helper").PaymentType>(type: T, handler: import("./payment-helper").PaymentHandler<T>): void;
    invokePayment<T extends import("./payment-helper").PaymentType>(type: T, ...args: Parameters<import("./payment-helper").PaymentHandler<T>>): Promise<any>;
};