/// <reference types="googlepay" />
/**
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

interface ReadyToPayChangeResponse {
    isButtonVisible: boolean;
    isReadyToPay: boolean;
    paymentMethodPresent?: boolean;
}

/**
 * Custom element for the Google Pay button
 */
declare class GooglePayButton extends HTMLElement {
    private manager;
    private static _observedAttributes;
    paymentRequest: google.payments.api.PaymentDataRequest;
    environment: google.payments.api.Environment;
    existingPaymentMethodRequired: boolean;
    buttonColor?: google.payments.api.ButtonColor;
    buttonType?: google.payments.api.ButtonType;
    buttonRadius?: number;
    buttonSizeMode?: google.payments.api.ButtonSizeMode;
    buttonLocale?: string;
    buttonBorderType?: google.payments.api.ButtonBorderType;
    onPaymentDataChanged?: google.payments.api.PaymentDataChangedHandler;
    onPaymentAuthorized?: google.payments.api.PaymentAuthorizedHandler;
    onReadyToPayChange?: (result: ReadyToPayChangeResponse) => void;
    onLoadPaymentData?: (paymentData: google.payments.api.PaymentData) => void;
    onCancel?: (reason: google.payments.api.PaymentsError) => void;
    onError?: (error: Error | google.payments.api.PaymentsError) => void;
    onClick?: (event: Event) => void;
    get isReadyToPay(): boolean | undefined;
    private assertRequiredProperty;
    /**
     * Throws an error.
     *
     * Used for testing purposes so that the method can be spied on.
     */
    private throwError;
    static get observedAttributes(): string[];
    /**
     * Registers an attribute to be observed.
     *
     * @param name Attribute name to observe.
     * @internal
     */
    addObservedAttribute(name: string): void;
    private dispatch;
    private initializeButton;
    connectedCallback(): Promise<void>;
    disconnectedCallback(): void;
    attributeChangedCallback(name: string): Promise<void>;
    notifyPropertyChanged(property: string): Promise<void>;
}
interface GooglePayButton {
    addEventListener(type: 'loadpaymentdata', listener: (event: CustomEvent<google.payments.api.PaymentData>) => void): void;
    addEventListener(type: 'error', listener: (event: ErrorEvent) => void): void;
    addEventListener(type: 'cancel', listener: (event: CustomEvent<google.payments.api.PaymentsError>) => void): void;
    addEventListener(type: 'readytopaychange', listener: (event: CustomEvent<boolean>) => void): void;
    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
    removeEventListener(type: 'loadpaymentdata', listener: (event: CustomEvent<google.payments.api.PaymentData>) => void): void;
    removeEventListener(type: 'error', listener: (event: ErrorEvent) => void): void;
    removeEventListener(type: 'cancel', listener: (event: CustomEvent<google.payments.api.PaymentsError>) => void): void;
    removeEventListener(type: 'readytopaychange', listener: (event: CustomEvent<boolean>) => void): void;
    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
}

export { ReadyToPayChangeResponse, GooglePayButton as default };