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added example which can be iframed and does postMessage() to parent
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| <!DOCTYPE html> | ||
| <!-- | ||
| 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. | ||
| --> | ||
|
|
||
| <html> | ||
| <head> | ||
| <meta charset="utf-8"> | ||
| <meta name="viewport" content="width=device-width, initial-scale=1"> | ||
| <title>Basic Example</title> | ||
| </head> | ||
| <body> | ||
| <div id="container"></div> | ||
| <p>Result from the iframe (postMessage()):</p> | ||
| <div id="result"></div> | ||
| <script async | ||
| src="https://pay.google.com/gp/p/js/pay.js" | ||
| onload="onGooglePayLoaded()"></script> | ||
| <script> | ||
| /** | ||
| * Define the version of the Google Pay API referenced when creating your | ||
| * configuration | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#PaymentDataRequest|apiVersion in PaymentDataRequest} | ||
| */ | ||
| const baseRequest = { | ||
| apiVersion: 2, | ||
| apiVersionMinor: 0 | ||
| }; | ||
|
|
||
| /** | ||
| * Card networks supported by your site and your gateway | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#CardParameters|CardParameters} | ||
| * @todo confirm card networks supported by your site and gateway | ||
| */ | ||
| const allowedCardNetworks = ["AMEX", "DISCOVER", "INTERAC", "JCB", "MASTERCARD", "VISA"]; | ||
|
|
||
| /** | ||
| * Card authentication methods supported by your site and your gateway | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#CardParameters|CardParameters} | ||
| * @todo confirm your processor supports Android device tokens for your | ||
| * supported card networks | ||
| */ | ||
| const allowedCardAuthMethods = ["PAN_ONLY", "CRYPTOGRAM_3DS"]; | ||
|
|
||
| /** | ||
| * Identify your gateway and your site's gateway merchant identifier | ||
| * | ||
| * The Google Pay API response will return an encrypted payment method capable | ||
| * of being charged by a supported gateway after payer authorization | ||
| * | ||
| * @todo check with your gateway on the parameters to pass | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#gateway|PaymentMethodTokenizationSpecification} | ||
| */ | ||
| const tokenizationSpecification = { | ||
| type: 'PAYMENT_GATEWAY', | ||
| parameters: { | ||
| 'gateway': 'example', | ||
| 'gatewayMerchantId': 'exampleGatewayMerchantId' | ||
| } | ||
| }; | ||
|
|
||
| /** | ||
| * Describe your site's support for the CARD payment method and its required | ||
| * fields | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#CardParameters|CardParameters} | ||
| */ | ||
| const baseCardPaymentMethod = { | ||
| type: 'CARD', | ||
| parameters: { | ||
| allowedAuthMethods: allowedCardAuthMethods, | ||
| allowedCardNetworks: allowedCardNetworks | ||
| } | ||
| }; | ||
|
|
||
| /** | ||
| * Describe your site's support for the CARD payment method including optional | ||
| * fields | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#CardParameters|CardParameters} | ||
| */ | ||
| const cardPaymentMethod = Object.assign( | ||
| {}, | ||
| baseCardPaymentMethod, | ||
| { | ||
| tokenizationSpecification: tokenizationSpecification | ||
| } | ||
| ); | ||
|
|
||
| /** | ||
| * An initialized google.payments.api.PaymentsClient object or null if not yet set | ||
| * | ||
| * @see {@link getGooglePaymentsClient} | ||
| */ | ||
| let paymentsClient = null; | ||
|
|
||
| /** | ||
| * Configure your site's support for payment methods supported by the Google Pay | ||
| * API. | ||
| * | ||
| * Each member of allowedPaymentMethods should contain only the required fields, | ||
| * allowing reuse of this base request when determining a viewer's ability | ||
| * to pay and later requesting a supported payment method | ||
| * | ||
| * @returns {object} Google Pay API version, payment methods supported by the site | ||
| */ | ||
| function getGoogleIsReadyToPayRequest() { | ||
| return Object.assign( | ||
| {}, | ||
| baseRequest, | ||
| { | ||
| allowedPaymentMethods: [baseCardPaymentMethod] | ||
| } | ||
| ); | ||
| } | ||
|
|
||
| /** | ||
| * Configure support for the Google Pay API | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#PaymentDataRequest|PaymentDataRequest} | ||
| * @returns {object} PaymentDataRequest fields | ||
| */ | ||
| function getGooglePaymentDataRequest() { | ||
| const paymentDataRequest = Object.assign({}, baseRequest); | ||
| paymentDataRequest.allowedPaymentMethods = [cardPaymentMethod]; | ||
| paymentDataRequest.transactionInfo = getGoogleTransactionInfo(); | ||
| paymentDataRequest.merchantInfo = { | ||
| // @todo a merchant ID is available for a production environment after approval by Google | ||
| // See {@link https://developers.google.com/pay/api/web/guides/test-and-deploy/integration-checklist|Integration checklist} | ||
| // merchantId: '01234567890123456789', | ||
| merchantName: 'Example Merchant' | ||
| }; | ||
| return paymentDataRequest; | ||
| } | ||
|
|
||
| /** | ||
| * Return an active PaymentsClient or initialize | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/client#PaymentsClient|PaymentsClient constructor} | ||
| * @returns {google.payments.api.PaymentsClient} Google Pay API client | ||
| */ | ||
| function getGooglePaymentsClient() { | ||
| if ( paymentsClient === null ) { | ||
| paymentsClient = new google.payments.api.PaymentsClient({environment: 'TEST'}); | ||
| } | ||
| return paymentsClient; | ||
| } | ||
|
|
||
| /** | ||
| * Initialize Google PaymentsClient after Google-hosted JavaScript has loaded | ||
| * | ||
| * Display a Google Pay payment button after confirmation of the viewer's | ||
| * ability to pay. | ||
| */ | ||
| function onGooglePayLoaded() { | ||
| const paymentsClient = getGooglePaymentsClient(); | ||
| paymentsClient.isReadyToPay(getGoogleIsReadyToPayRequest()) | ||
| .then(function(response) { | ||
| if (response.result) { | ||
| addGooglePayButton(); | ||
| // @todo prefetch payment data to improve performance after confirming site functionality | ||
| // prefetchGooglePaymentData(); | ||
| } | ||
| }) | ||
| .catch(function(err) { | ||
| // show error in developer console for debugging | ||
| console.error(err); | ||
| }); | ||
| } | ||
|
|
||
| /** | ||
| * Add a Google Pay purchase button alongside an existing checkout button | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#ButtonOptions|Button options} | ||
| * @see {@link https://developers.google.com/pay/api/web/guides/brand-guidelines|Google Pay brand guidelines} | ||
| */ | ||
| function addGooglePayButton() { | ||
| const paymentsClient = getGooglePaymentsClient(); | ||
| const button = | ||
| paymentsClient.createButton({onClick: onGooglePaymentButtonClicked}); | ||
| document.getElementById('container').appendChild(button); | ||
| } | ||
|
|
||
| /** | ||
| * Provide Google Pay API with a payment amount, currency, and amount status | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/request-objects#TransactionInfo|TransactionInfo} | ||
| * @returns {object} transaction info, suitable for use as transactionInfo property of PaymentDataRequest | ||
| */ | ||
| function getGoogleTransactionInfo() { | ||
| return { | ||
| countryCode: 'US', | ||
| currencyCode: 'USD', | ||
| totalPriceStatus: 'FINAL', | ||
| // set to cart total | ||
| totalPrice: '1.00' | ||
| }; | ||
| } | ||
|
|
||
| /** | ||
| * Prefetch payment data to improve performance | ||
| * | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/client#prefetchPaymentData|prefetchPaymentData()} | ||
| */ | ||
| function prefetchGooglePaymentData() { | ||
| const paymentDataRequest = getGooglePaymentDataRequest(); | ||
| // transactionInfo must be set but does not affect cache | ||
| paymentDataRequest.transactionInfo = { | ||
| totalPriceStatus: 'NOT_CURRENTLY_KNOWN', | ||
| currencyCode: 'USD' | ||
| }; | ||
| const paymentsClient = getGooglePaymentsClient(); | ||
| paymentsClient.prefetchPaymentData(paymentDataRequest); | ||
| } | ||
|
|
||
| /** | ||
| * Show Google Pay payment sheet when Google Pay payment button is clicked | ||
| */ | ||
| function onGooglePaymentButtonClicked() { | ||
| const paymentDataRequest = getGooglePaymentDataRequest(); | ||
| paymentDataRequest.transactionInfo = getGoogleTransactionInfo(); | ||
|
|
||
| const paymentsClient = getGooglePaymentsClient(); | ||
| paymentsClient.loadPaymentData(paymentDataRequest) | ||
| .then(function(paymentData) { | ||
| // handle the response | ||
| processPayment(paymentData); | ||
| }) | ||
| .catch(function(err) { | ||
| // show error in developer console for debugging | ||
| console.error(err); | ||
| }); | ||
| } | ||
|
|
||
| /** | ||
| * Process payment data returned by the Google Pay API | ||
| * | ||
| * @param {object} paymentData response from Google Pay API after user approves payment | ||
| * @see {@link https://developers.google.com/pay/api/web/reference/response-objects#PaymentData|PaymentData object reference} | ||
| */ | ||
| function processPayment(paymentData) { | ||
| console.log(paymentData); | ||
| window.postMessage("Success with card: " + paymentData.paymentMethodData.description, "https://dmengelt.github.io"); | ||
| // show returned data in developer console for debugging | ||
| // @todo pass payment token to your gateway to process payment | ||
| paymentToken = paymentData.paymentMethodData.tokenizationData.token; | ||
| } | ||
| </script> | ||
| </body> | ||
| </html> |