Tutorial

Follow the steps in this tutorial to add Google Pay to your Android application and configure it to accept payment cards.

Step 1: Define your payment configuration
Step 2: Create a PaymentsClient instance
Step 3: Determine readiness to pay with the Google Pay API
Step 4: Add a Google Pay payment button
Step 5: Create a PaymentDataRequest object
Step 6: Initiate the payment process with Google Pay
Put it all together

Step 1: Define your payment configuration

Configure your Google Pay API version

Declare the version of the Google Pay API that your application uses. The major and minor versions affect the fields expected in each passed object and are included in the response.

Create a base request object that contains properties that are present in all other request objects.

Kotlin

private val baseRequest = JSONObject()
    .put("apiVersion", 2)
    .put("apiVersionMinor", 0)PaymentsUtil.kt

Java

private static JSONObject getBaseRequest() throws JSONException {
  return new JSONObject()
      .put("apiVersion", 2)
      .put("apiVersionMinor", 0);
}PaymentsUtil.java

Request a payment token for your payment provider

Google encrypts information about a payer's selected card for secure processing by a payment provider.

Kotlin

private fun gatewayTokenizationSpecification(): JSONObject {
    return JSONObject().apply {
        put("type", "PAYMENT_GATEWAY")
        put("parameters", JSONObject(mapOf(
                "gateway" to "example",
                "gatewayMerchantId" to "exampleGatewayMerchantId")))
    }
}

Java

private static JSONObject getGatewayTokenizationSpecification() throws JSONException {
  return new JSONObject()
      .put("type", "PAYMENT_GATEWAY")
      .put("parameters", new JSONObject()
          .put("gateway", "example")
          .put("gatewayMerchantId", "exampleGatewayMerchantId")
      );
}PaymentsUtil.java

Tip: example is a valid gateway name in the TEST environment. If you want to try out the API, you can leave the code sample as-is. When you use the example gateway, the API doesn't return card data capable of a transaction, but the user flow looks the same.

Replace example and exampleGatewayMerchantId with the appropriate values for your payment provider. Use the following table to find the specific gateway and gatewayMerchantId values for your payment provider:

Gateway	Parameters and documents
accept.blue	"gateway": "acceptblue" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ACI	"gateway": "aciworldwide" "gatewayMerchantId": "`YOUR_ENTITY_ID`" Developer docs
ACpay	"gateway": "acpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Acquired.com	"gateway": "acquired" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Adyen	"gateway": "adyen" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" Developer docs
Airba Pay	"gateway": "airbapay"" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" Developer docs
Airvend	"gateway": "airvend" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Airwallex	"gateway": "airwallex" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" Developer docs
Akurateco	"gateway": "akuratecolab" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Alfa-Bank	"gateway": "alfabank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Algoritma	"gateway": "algoritma" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Allinpay	"gateway": "allinpayintl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
AllPayments	"gateway": "allpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
alticepay	"gateway": "alticepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Anedot	"gateway": "anedot" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ApcoPay	"gateway": "apcopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
APPEX	"gateway": "epos" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
AsiaBill	"gateway": "asiabill" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Assist	"gateway": "assist" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Assist Belarus	"gateway": "belassist" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Assist Kazakhstan	"gateway": "assistkz" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Aurus	"gateway": "auruspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Axerve	"gateway": "gestpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Bank 131	"gateway": "bank131" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Bank Vostok	"gateway": "bankvostok" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Barclaycard	"gateway": "barclayssmartpayadvance" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Barion	"gateway": "barion" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
BCC.KZ	"gateway": "bccpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
bePaid	"gateway": "ecomcharge" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Bereke Bank	"gateway": "berekepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Billing Systems	"gateway": "billingsystems" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Bizzon	"gateway": "bizzon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Blocks	"gateway": "blocks" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Bluefin	"gateway": "bluefin" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Blue Media	"gateway": "bluemedia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
BlueSnap	"gateway": "bluesnap" "gatewayMerchantId": "`YOUR_shopToken`" Developer docs
BPC	"gateway": "bpcpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
BR-DGE	"gateway": "comcarde" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Braintree	"gateway": "braintree" "braintree:apiVersion": "v1" "braintree:sdkVersion": "braintree.client.`VERSION`" "braintree:merchantId": "`YOUR_BRAINTREE_MERCHANT_ID`" "braintree:clientKey": "`YOUR_BRAINTREE_TOKENIZATION_KEY`" Developer docs
Braspag	"gateway": "cielo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
BridgerPay	"gateway": "bridgerpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Buya	"gateway": "buya" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CardCom	"gateway": "cardcom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CardConnect	"gateway": "cardconnect" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cardknox	"gateway": "cardknox" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cardstream	"gateway": "crst" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cashflows	"gateway": "cashflowsgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cathay United Bank	"gateway": "cathaybk" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cecabank	"gateway": "cecabank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Celerispay	"gateway": "celerispay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CentralPay	"gateway": "centralpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Chargehive	"gateway": "chargehive" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CharityEngine	"gateway": "charityengine" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Chase Merchant Services	"gateway": "chase" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Checkout.com	"gateway": "checkoutltd" "gatewayMerchantId": "`YOUR_PUBLIC_KEY`" Developer docs
CityPay	"gateway": "citypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cloud9 Payment Gateway (C9PG)	"gateway": "c9pg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CloudPayments	"gateway": "cloudpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Computop	"gateway": "computop" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ConcordPay	"gateway": "concordpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Connectum	"gateway": "connectum" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ConnexPay	"gateway": "connexpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Corefy	"gateway": "paycoreio" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Corvus Pay	"gateway": "corvuspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Credorax	"gateway": "credorax" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CrossPay	"gateway": "crosspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CSG Forte	"gateway": "csgforte" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CTBC Bank	"gateway": "ctbcbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
CURO Payments	"gateway": "curopayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Cybersource	"gateway": "cybersource" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
danube.pay	"gateway": "danubepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Datacap Systems, Inc.	"gateway": "datatrans" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Datatrans	"gateway": "datatrans" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
DECTA	"gateway": "decta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs
Deutsche Bank AG	"gateway": "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs
Deutsche Bank – Merchant Solutions	"gateway": "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
DG Financial Technology, Inc.	"gateway": "veritrans" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Digital Finance	"gateway": "digitalfinance" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
dLocal	"gateway": "dlocal" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
DNA Payments	"gateway": "dnapayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Dojo	"gateway": "dojo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Dotpay	"gateway": "dotpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
e-SiTef - Software Express	"gateway": "softwareexpress" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
easycard	"gateway": "easycard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
EasyPay	"gateway": "easypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
EBANX	"gateway": "ebanx" "gatewayMerchantId": "`YOUR_PUBLIC_INTEGRATION_KEY`" Developer docs
eCard	"gateway": "ecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ECOMMPAY	"gateway": "ecommpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Ecopaynet	"gateway": "ecopaynet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ECPay	"gateway": "ecpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
eGHL	"gateway": "eghl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Elavon (Converge)	"gateway": "convergepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Emerchantpay	"gateway": "emerchantpay" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
emspay	"gateway": "emsonline" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Encoded	"gateway": "encoded" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
EpicPay	"gateway": "epicpay" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Espago	"gateway": "espago" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
EveryPay	"gateway": "everypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
EVONET	"gateway": "cardinfolink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Evopay	"gateway": "evopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Evo Payment Gateway	"gateway": "evopaymentgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
exactly.com	"gateway": "exactly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Exact Payments	"gateway": "exactpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fat Zebra	"gateway": "fatzebra" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fenige	"gateway": "fenige" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fibonatix	"gateway": "fibonatixparagon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Financial Line	"gateway": "finline" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Finanso UA	"gateway": "finansoua" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
FINEXUS	"gateway": "finexus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Finix	"gateway": "finix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
First American by Deluxe	"gateway": "firstpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
FIS Biller Solutions	"gateway": "fisglobalbsp" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fiserv	"gateway": "fiserv" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fluid Pay	"gateway": "fluidpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
FM Finance LTD	"gateway": "fmfinanceltd" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ForteBank	"gateway": "fortebank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Freedom Finance Bank	"gateway": "axayscom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
FreedomPay	"gateway": "freedompay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
FreedomPay.Money	"gateway": "payboxmoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Freepay	"gateway": "freepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Frontstream	"gateway": "frontstreampayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Fung Payments	"gateway": "fungpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GBPayments	"gateway": "gbpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
geidea	"gateway": "geidea" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GETTRX	"gateway": "globalelectronictechnology" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Global One Pay	"gateway": "globalonepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Global Payments	"gateway": "globalpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GMO Payment Gateway	"gateway": "gmopg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GoDaddy Payments	"gateway": "godaddypayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Good Idea Technologies	"gateway": "git" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GoPay	"gateway": "gopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
GP Webpay	"gateway": "gpwebpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Gravity Payments	"gateway": "gravitypayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Gr4vy	"gateway": "gr4vy" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Halyk Bank	"gateway": "halykbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Helcim	"gateway": "helcim" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
HIPS	"gateway": "hips" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
HiTrust	"gateway": "hitrustpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Hyp	"gateway": "hyp" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
icard	"gateway": "icardwallet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
iKhokha	"gateway": "ikhokha" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
IMOJE	"gateway": "imoje" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Impaya	"gateway": "impayarus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
InPlat	"gateway": "inplat" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
InstaMed	"gateway": "instamed" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
IntellectMoney	"gateway": "intellectmoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Interactive Transaction Solutions	"gateway": "interactivets" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Interswitch Payment Gallery	"gateway": "interswitch" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Intervale	"gateway": "intervale" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ioka fintech	"gateway": "ioka" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
iPay88	"gateway": "ipay88" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
iQmetrix	"gateway": "iqmetrixpaymentservicesgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
IXOPAY	"gateway": "ixopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
JetPay	"gateway": "jetpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
JudoPay	"gateway": "judopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Kassa	"gateway": "kassacom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
kassa24pay	"gateway": "kassa24pay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Kineox	"gateway": "kineox" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Klix by Citadele	"gateway": "klix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
LHV Pank	"gateway": "lhvpank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Liberty	"gateway": "liberty" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Life Pay	"gateway": "lifepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Limepay	"gateway": "limepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
LiqPay	"gateway": "liqpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Littlepay	"gateway": "littlepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
LogPay	"gateway": "logpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Loyale	"gateway": "loyale" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
lynck	"gateway": "lynck" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Lyra	"gateway": "lyra" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Magnetiq Bank	"gateway": "magnetiq" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
maib	"gateway": "maibecomm" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Mandarin	"gateway": "mandarin" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Market Pay	"gateway": "marketpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Mastercard Payment Gateway Services	"gateway": "mpgs" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MerchantE	"gateway": "merchante" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Merchant Warrior	"gateway": "merchantwarrior" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Minsait Payments Systems	"gateway": "minsaitpaymentsgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MITEC	"gateway": "mitecmx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MIXPLAT	"gateway": "mixplat" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MOBI.Money	"gateway": "mobimoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Modulbank	"gateway": "modulbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Molpay	"gateway": "molpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Mondido	"gateway": "mondido" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Monei	"gateway": "monei" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Moneris	"gateway": "moneris" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Moneta	"gateway": "moneta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
Monext	"gateway": "monext" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Money.Mail.Ru	"gateway": "moneymailru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MPay	"gateway": "managepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
mstartipg	"gateway": "mstartipg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Multicarta	"gateway": "mulitcarta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MultiSafepay	"gateway": "multisafepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Mundipagg	"gateway": "mundipagg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MyCheck	"gateway": "mycheck" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MyChoice2Pay	"gateway": "mychoice2pay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MyFatoorah	"gateway": "myfatoorah" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
MyPay	"gateway": "mypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
myPOS	"gateway": "mypos" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
N&TS Group	"gateway": "netsgroup" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
NCCC	"gateway": "nccc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Neon Pay	"gateway": "neonpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Netopia	"gateway": "netopia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Netvalve	"gateway": "netvalve" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Newebpay (formerly STPath, Pay2Go)	"gateway": "newebpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Newtech	"gateway": "newtechmobile" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Nexi	"gateway": "nexi" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
NMI	"gateway": "gatewayservices" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
noon payments	"gateway": "noonpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Noqoody Pay	"gateway": "noqoodypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Novalnet	"gateway": "novalnet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
NTT DATA	"gateway": "nttdatahk" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Nuvei	"gateway": "nuvei" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Oceanpayment	"gateway": "oceanpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Omise	"gateway": "omise" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
One Inc	"gateway": "oneinc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Onelya	"gateway": "onelya" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" Developer docs
Onerway	"gateway": "ronghan" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" Developer docs
OneVision Limited	"gateway": "onevision" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" Developer docs
OnPay	"gateway": "onpayio" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Opayo by Elavon	"gateway": "opayoelavon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Oschadbank	"gateway": "oschadbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
pagarme	"gateway": "pagarme" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PagBank	"gateway": "pagbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PagBrasil	"gateway": "pagbrasil" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PagSeguro	"gateway": "pagsegurointernational" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PAY2M	"gateway": "pay2m" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payarc	"gateway": "payarc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pay.com	"gateway": "paycom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PAYCOMET	"gateway": "paycomet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paydock	"gateway": "paydock" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayEase	"gateway": "payeasenet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayFabric	"gateway": "payfabric" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayFacto	"gateway": "payfacto" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
paygent	"gateway": "paygent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payhub	"gateway": "payhub" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayLane	"gateway": "paylane" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payler	"gateway": "payler" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayLink®	"gateway": "paylink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payload	"gateway": "payload" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymark	"gateway": "paymark" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayMaster	"gateway": "paymaster" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payment Fusion	"gateway": "paymentfusion" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymentvision	"gateway": "paymentvision" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymentwall	"gateway": "paymentwall" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymo	"gateway": "paymo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymob	"gateway": "gpaymob" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paymtech	"gateway": "paymtech" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayNearMe	"gateway": "paynearme" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payneteasy	"gateway": "payneteasy" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pay.nl	"gateway": "paynl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paynopain	"gateway": "paynopain" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayOne	"gateway": "payone" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayOnline	"gateway": "payonline" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payoo	"gateway": "payoo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayPlus	"gateway": "payplus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payrails	"gateway": "payrails" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payrexx	"gateway": "payrexx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayRiff	"gateway": "payriff" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payrix	"gateway": "payrix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paysafe	"gateway": "paysafe" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payscout	"gateway": "payscout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paysend Business	"gateway": "paysend" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paysoft	"gateway": "paysoft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pay360	"gateway": "pay360" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayTech Ukraine	"gateway": "paytech" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paythru	"gateway": "paythru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payture	"gateway": "payture" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayU	"gateway": "payu" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayU LATAM	"gateway": "payulatam" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PAYUNi	"gateway": "payuni" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayU Romania	"gateway": "payuro" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PayU Russia	"gateway": "payuru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Payway	"gateway": "payway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Paywiser	"gateway": "paywiser" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pelecard	"gateway": "pelecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pikassa	"gateway": "pikassa" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PingPong	"gateway": "pingpongx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pin Payments	"gateway": "pinpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Planet	"gateway": "cccpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PlanetPay	"gateway": "itcardpaymentservice" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Plategka.com	"gateway": "plategkacom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Platon	"gateway": "platon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Pomelo	"gateway": "pomelopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Portmone	"gateway": "portmonecom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Primer	"gateway": "primer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Procard	"gateway": "procard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
ProcessOut	"gateway": "processout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Przelewy24	"gateway": "przelewy24" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PSCB	"gateway": "pscbru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
PXP Financial	"gateway": "pxpfinancial" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Qenta Payment CEE	"gateway": "qenta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
QIWI	"gateway": "qiwi" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Qualpay	"gateway": "qualpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
QuickPay	"gateway": "quickpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Qvalent	"gateway": "qvalent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Radial	"gateway": "radial" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Rapyd	"gateway": "rapyd" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
RBK.money	"gateway": "rbkmoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Rebail Capital	"gateway": "rebailcapital" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Rebilly	"gateway": "Rebilly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Recurly	"gateway": "recurly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Reddot	"gateway": "reddotpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Rede	"gateway": "rede" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Redsys	"gateway": "redsys" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Reepay	"gateway": "reepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
RocketGate	"gateway": "rocketgate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Russian Standard Bank	"gateway": "rsb" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Ryft	"gateway": "ryft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Saferpay	"gateway": "worldlinesaferpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Safexpay	"gateway": "safexpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Sberbank	"gateway": "sberbank" "gatewayMerchantId": "`YOUR_ORGANIZATION_NAME`" Developer docs
SEB Baltic	"gateway": "sebbaltic" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Sense Bank	"gateway": "sensebank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
SensePass	"gateway": "sensepass" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Shift4	"gateway": "shift4payments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Shiji Group	"gateway": "shijipaymentsolutions" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
SH Start High	"gateway": "shstartpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
simbasoft	"gateway": "simbasoft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Sipay	"gateway": "sipay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Softbank Payment Service	"gateway": "sbps" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Solid	"gateway": "solid" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Sony Payment Services	"gateway": "sonypaymentservices" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Splitit	"gateway": "splitit" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Spreedly	"gateway": "spreedly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Square	"gateway": "square" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
SredaPay	"gateway": "sredapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Stancer	"gateway": "stancer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Stripe	"gateway": "stripe" "stripe:version": "2018-10-31" "stripe:publishableKey": "`YOUR_PUBLIC_STRIPE_KEY`" Developer docs
Suntech	"gateway": "esafe" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Svea Bank	"gateway": "svea" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Swedbank Baltic	"gateway": "swedbankbaltic" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Swedbank Pay	"gateway": "payexswedbankpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TabaPay	"gateway": "tabapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TapPay (Cherri Tech)	"gateway": "tappay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TapPayments	"gateway": "tappayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
tarlanpayments	"gateway": "tarlanpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TAS Link	"gateway": "taslink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tatra banka (CardPay)	"gateway": "tatrabanka" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
TEKO	"gateway": "teko" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
theMAP	"gateway": "themap" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Till Payments	"gateway": "tillpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tinkoff	"gateway": "tinkoff" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TPay	"gateway": "tpaycom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TPay.com	"gateway": "tpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Transact Campus	"gateway": "transactcampus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Transaction Services Network	"gateway": "tns" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Transpayrent	"gateway": "transpayrent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tranzila	"gateway": "tranzila" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tranzzo	"gateway": "tranzzo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tribe Payments	"gateway": "tribepayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Truevo	"gateway": "truevo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
TrustPay	"gateway": "trustpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Trust Payments	"gateway": "trustpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Tuna	"gateway": "tuna" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
2can&ibox	"gateway": "twocan" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
UAPAY	"gateway": "uapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
UBRR	"gateway": "ubrrpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Ukrcardpay	"gateway": "ukrcardpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
UkrGasBank Pay	"gateway": "ukrgasbankpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Unibank OJSC	"gateway": "unibankcheckout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
unitedfinancialcorporation	"gateway": "unitedfinancialcorporation" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Uniteller	"gateway": "uniteller" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Unitpay	"gateway": "unitpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Unlimint	"gateway": "unlimint" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Unzer	"gateway": "unzer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Unzer Austria	"gateway": "unzeraustria" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
UPC	"gateway": "upc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Upgate	"gateway": "upgate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
USAePay	"gateway": "usaepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
UseePay	"gateway": "useepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Valitor	"gateway": "valitor" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Vantiv	"gateway": "vantiv" "vantiv:merchantPayPageId": "`YOUR_PAY_PAGE_ID`" "vantiv:merchantOrderId": "`YOUR_ORDER_ID`" "vantiv:merchantTransactionId": "`YOUR_TRANSACTION_ID`" "vantiv:merchantReportGroup": "*web" Developer docs
Verestro	"gateway": "verestro" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Very Good Security	"gateway": "verygoodsecurity" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Vindicia	"gateway": "vindicia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Viva Wallet	"gateway": "vivawallet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
VTEX	"gateway": "vtex" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Walletdoc	"gateway": "walletdoc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Walletto	"gateway": "walletto" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WayForPay	"gateway": "wayforpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WEAT	"gateway": "weatpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WhenThen	"gateway": "whenthen" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Windcave	"gateway": "windcave" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Wirebank	"gateway": "wirebank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Wirecard	"gateway": "wirecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WOOPPAY	"gateway": "wooppay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WooshPay	"gateway": "swooshtransfer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldline (GlobalCollect)	"gateway": "globalcollect" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldline - Ingenico (WL Online Checkout)	"gateway": "worldlineingenicoogone" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldline Nordics (Worldline Online Checkout)	"gateway": "worldlineonlinecheckout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldline Sips	"gateway": "wlsips" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldnet	"gateway": "worldnet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Worldpay	"gateway": "worldpay" "gatewayMerchantId": "`YOUR_WORLDPAY_MERCHANT_ID`" Developer docs
Wpay	"gateway": "wpayaus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
WSPay	"gateway": "wspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
XPATE	"gateway": "xpate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
xpay	"gateway": "xpaycomua" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
YIĞIM Payment System	"gateway": "yigim" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" No developer docs available
ЮKassa (YooKassa)	"gateway": "yoomoney" "gatewayMerchantId": "`YOUR_SHOP_ID`" Developer docs
Z-credit	"gateway": "zcredit" "gatewayMerchantId": "`YOUR_SHOP_ID`" Developer docs
ZEN.com	"gateway": "zen" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Zest	"gateway": "zestpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs
Zuora	"gateway": "zuora" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" Developer docs

The PAYMENT_GATEWAY tokenization type is the most common merchant implementation of the card payment method in the Google Pay API. If your payment provider isn't supported, you might be able to accept Google Pay by a DIRECT integration. For more information, see the Direct tokenization documentation.

Define supported payment card networks

Define the card networks that your application accepts.

Kotlin

private val allowedCardNetworks = JSONArray(listOf(
        "AMEX",
        "DISCOVER",
        "INTERAC",
        "JCB",
        "MASTERCARD",
        "VISA"))

Java

private static JSONArray getAllowedCardNetworks() {
  return new JSONArray()
      .put("AMEX")
      .put("DISCOVER")
      .put("INTERAC")
      .put("JCB")
      .put("MASTERCARD")
      .put("VISA");
}

The Google Pay API might return cards on file from your account (PAN_ONLY) or a device token on an Android-powered device authenticated with a 3-D Secure cryptogram (CRYPTOGRAM_3DS). You can configure the API to return the methods that your application supports.

Before you set allowedCardAuthMethods, confirm with your payment processor and acquirer on whether device tokens (CRYPTOGRAM_3DS) are supported in your region.

Kotlin

private val allowedCardAuthMethods = JSONArray(listOf(
        "PAN_ONLY",
        "CRYPTOGRAM_3DS"))

Java

private static JSONArray getAllowedCardAuthMethods() {
  return new JSONArray()
      .put("PAN_ONLY")
      .put("CRYPTOGRAM_3DS");
}

For more information, see the reference documentation for the CardParameters object. For Android device tokens support, check with your gateway or processor for the card networks supported.

Describe your allowed payment methods

In order to describe your application's support for the CARD payment method, combine your supported authentication methods and card networks.

Kotlin

private fun baseCardPaymentMethod(): JSONObject =
    JSONObject()
        .put("type", "CARD")
        .put(
            "parameters", JSONObject()
                .put("allowedAuthMethods", allowedCardAuthMethods)
                .put("allowedCardNetworks", allowedCardNetworks)
                .put("billingAddressRequired", true)
                .put(
                    "billingAddressParameters", JSONObject()
                        .put("format", "FULL")
                )
        )PaymentsUtil.kt

Java

private static JSONObject getBaseCardPaymentMethod() throws JSONException {
  return new JSONObject()
      .put("type", "CARD")
      .put("parameters", new JSONObject()
          .put("allowedAuthMethods", getAllowedCardAuthMethods())
          .put("allowedCardNetworks", getAllowedCardNetworks())
          .put("billingAddressRequired", true)
          .put("billingAddressParameters", new JSONObject()
              .put("format", "FULL")
          )
      );
}PaymentsUtil.java

Note: CARD is the only supported payment method.

Extend your configuration with information about how to tokenize the payment method.

Kotlin

private val cardPaymentMethod: JSONObject = baseCardPaymentMethod()
    .put("tokenizationSpecification", gatewayTokenizationSpecification)PaymentsUtil.kt

Java

private static JSONObject getCardPaymentMethod() throws JSONException {
  return getBaseCardPaymentMethod()
      .put("tokenizationSpecification", getGatewayTokenizationSpecification());
}PaymentsUtil.java

For more information, see the reference documentation for the CardParameters object.

Step 2: Create a PaymentsClient instance

Create a PaymentsClient instance to interact with the Google Pay API.

Kotlin

fun createPaymentsClient(context: Context): PaymentsClient {
    val walletOptions = Wallet.WalletOptions.Builder()
        .setEnvironment(Constants.PAYMENTS_ENVIRONMENT)
        .build()

    return Wallet.getPaymentsClient(context, walletOptions)
}PaymentsUtil.kt

Java

public static PaymentsClient createPaymentsClient(Context context) {
  Wallet.WalletOptions walletOptions =
      new Wallet.WalletOptions.Builder().setEnvironment(Constants.PAYMENTS_ENVIRONMENT).build();
  return Wallet.getPaymentsClient(context, walletOptions);
}PaymentsUtil.java

Step 3: Determine readiness to pay with the Google Pay API

Add your allowed payment methods to your base request object with the following code snippet:

Kotlin

fun isReadyToPayRequest(): JSONObject? =
    try {
        baseRequest
            .put("allowedPaymentMethods", JSONArray().put(baseCardPaymentMethod()))
    } catch (e: JSONException) {
        null
    }PaymentsUtil.kt

Java

public static JSONObject getIsReadyToPayRequest() {
  try {
    return getBaseRequest()
        .put("allowedPaymentMethods", new JSONArray().put(getBaseCardPaymentMethod()));
  } catch (JSONException e) {
    return null;
  }
}PaymentsUtil.java

Before you display the Google Pay button, call the isReadyToPay API to determine if the user can make payments with the Google Pay API. For a full list of configuration properties, see the IsReadyToPayRequest JSON object documentation.

Kotlin

private fun possiblyShowGooglePayButton() {

    val isReadyToPayJson = PaymentsUtil.isReadyToPayRequest() ?: return
    val request = IsReadyToPayRequest.fromJson(isReadyToPayJson.toString()) ?: return

    // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
    // OnCompleteListener to be triggered when the result of the call is known.
    val task = paymentsClient.isReadyToPay(request)
    task.addOnCompleteListener { completedTask ->
        try {
            completedTask.getResult(ApiException::class.java)?.let(::setGooglePayAvailable)
        } catch (exception: ApiException) {
            // Process error
            Log.w("isReadyToPay failed", exception)
        }
    }
}CheckoutActivity.kt

Kotlin
(coroutines)

private suspend fun fetchCanUseGooglePay(): Boolean {
    val request = IsReadyToPayRequest.fromJson(PaymentsUtil.isReadyToPayRequest().toString())
    return paymentsClient.isReadyToPay(request).await()
}CheckoutViewModel.kt

Java

private void possiblyShowGooglePayButton() {

  final Optional<JSONObject> isReadyToPayJson = PaymentsUtil.getIsReadyToPayRequest();
  if (!isReadyToPayJson.isPresent()) {
    return;
  }

  // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
  // OnCompleteListener to be triggered when the result of the call is known.
  IsReadyToPayRequest request = IsReadyToPayRequest.fromJson(isReadyToPayJson.get().toString());
  Task<Boolean> task = paymentsClient.isReadyToPay(request);
  task.addOnCompleteListener(this,
      new OnCompleteListener<Boolean>() {
        @Override
        public void onComplete(@NonNull Task<Boolean> task) {
          if (task.isSuccessful()) {
            setGooglePayAvailable(task.getResult());
          } else {
            Log.w("isReadyToPay failed", task.getException());
          }
        }
      });
}CheckoutActivity.java

Step 4: Add a Google Pay payment button

Add a Google Pay payment button to your app to encourage shoppers to check out with payment methods that are supported by the Google Pay API and your app, see PayButton API.

For more information about available button types, colors, and display requirements, see the ButtonOptions reference.

Add the PayButton layout to your application's checkout layout:

Kotlin
(Compose)

PayButton(
    modifier = Modifier
        .testTag("payButton")
        .fillMaxWidth(),
    onClick = onGooglePayButtonClick,
    allowedPaymentMethods = PaymentsUtil.allowedPaymentMethods.toString()CheckoutLayout.kt

XML

<com.google.android.gms.wallet.button.PayButton
        android:id="@+id/googlePayButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"/>">activity_checkout.xml

Note: To use the Jetpack Compose element, add the com.google.pay.button:compose-pay-button library to the list of dependencies in your Gradle build file. For more information, see compose-pay-button.

If you are adding the Google Pay button using XML...

Go to the Android activity and initialize the Google Pay button alongside other UI elements:

Kotlin

override fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)

  // Use view binding to access the UI elements
  layout = ActivityCheckoutBinding.inflate(layoutInflater)
  setContentView(layout.root)

  // Setup buttons
  googlePayButton = layout.googlePayButton
  googlePayButton.initialize(
      ButtonOptions.newBuilder()
          .setAllowedPaymentMethods(PaymentsUtil.allowedPaymentMethods.toString()).build()
  )
  googlePayButton.setOnClickListener { requestPayment() }

  // Check Google Pay availability
  model.canUseGooglePay.observe(this, Observer(::setGooglePayAvailable))
}

Java

private void initializeUi() {

  // Use view binding to access the UI elements
  ActivityCheckoutBinding layoutBinding = ActivityCheckoutBinding.inflate(getLayoutInflater());
  setContentView(layoutBinding.getRoot());

  // The Google Pay button is a layout file – take the root view
  googlePayButton = layoutBinding.googlePayButton;
  try {
    googlePayButton.initialize(
        ButtonOptions.newBuilder()
            .setAllowedPaymentMethods(PaymentsUtil.getAllowedPaymentMethods().toString()).build()
    );
    googlePayButton.setOnClickListener(this::requestPayment);
  } catch (JSONException e) {
    // Keep Google Pay button hidden (consider logging this to your app analytics service)
  }
}CheckoutActivity.java

Step 5: Create a PaymentDataRequest object

A PaymentDataRequest JSON object describes the information that you request from a payer in a Google Pay payment sheet. This includes information about the transaction price and the status of the provided price. For more information, see TransactionInfo JSON object documentation.

The following blocks add information about the merchant and the transaction to the PaymentDataRequest object needed to start the payment process with Google Pay.

Important: Merchants that process transactions in the European Economic Area (EEA) or any other countries that are subject to Strong Customer Authentication (SCA) must include the countryCode, totalPrice, and merchantName parameters to meet SCA requirements.

Kotlin

private fun getTransactionInfo(price: String): JSONObject =
    JSONObject()
        .put("totalPrice", price)
        .put("totalPriceStatus", "FINAL")
        .put("countryCode", Constants.COUNTRY_CODE)
        .put("currencyCode", Constants.CURRENCY_CODE)PaymentsUtil.kt

Java

private static JSONObject getTransactionInfo(String price) throws JSONException {
  return new JSONObject()
      .put("totalPrice", price)
      .put("totalPriceStatus", "FINAL")
      .put("countryCode", Constants.COUNTRY_CODE)
      .put("currencyCode", Constants.CURRENCY_CODE)
      .put("checkoutOption", "COMPLETE_IMMEDIATE_PURCHASE");
}PaymentsUtil.java

Kotlin

private val merchantInfo: JSONObject =
    JSONObject().put("merchantName", "Example Merchant")PaymentsUtil.kt

Java

private static JSONObject getMerchantInfo() throws JSONException {
  return new JSONObject().put("merchantName", "Example Merchant");
}PaymentsUtil.java

Assign your base request object to a new PaymentDataRequest JSON object. Then, add the payment methods supported by your application, such as any configuration of additional data expected in the response. Finally, add information about the transaction and the merchant who makes the request:

Kotlin

fun getPaymentDataRequest(priceCents: Long): JSONObject =
    baseRequest
        .put("allowedPaymentMethods", allowedPaymentMethods)
        .put("transactionInfo", getTransactionInfo(priceCents.centsToString()))
        .put("merchantInfo", merchantInfo)
        .put("shippingAddressRequired", true)
        .put(
            "shippingAddressParameters", JSONObject()
                .put("phoneNumberRequired", false)
                .put("allowedCountryCodes", JSONArray(listOf("US", "GB")))
        )PaymentsUtil.kt

Java

public static JSONObject getPaymentDataRequest(long priceCents) {
  try {
    final String price = PaymentsUtil.centsToString(priceCents);
    return PaymentsUtil.getBaseRequest()
        .put("allowedPaymentMethods", getAllowedPaymentMethods())
        .put("transactionInfo", getTransactionInfo(price))
        .put("merchantInfo", getMerchantInfo())
        .put("shippingAddressRequired", true)
        .put("shippingAddressParameters", new JSONObject()
            .put("phoneNumberRequired", false)
            .put("allowedCountryCodes", new JSONArray(Constants.SHIPPING_SUPPORTED_COUNTRIES))
        );

  } catch (JSONException e) {
    return null;
  }
}PaymentsUtil.java

The PaymentDataRequest object is a Parcelable that represents a payment data request. The PaymentDataRequest provides information that's necessary in order to support a payment.

For more information, see the PaymentDataRequest JSON object documentation.

Step 6: Initiate the payment process with Google Pay

To start the payment process, call the loadPaymentData request using the PaymentsClient object. This call returns a Task object with the result of the operation.

First, create the loadPaymentData task, using the request created in the previous step:

Kotlin

fun getLoadPaymentDataTask(priceCents: Long): Task<PaymentData> {
    val paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents)
    val request = PaymentDataRequest.fromJson(paymentDataRequestJson.toString())
    return paymentsClient.loadPaymentData(request)
}CheckoutViewModel.kt

Java

public Task<PaymentData> getLoadPaymentDataTask(final long priceCents) {
    JSONObject paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents);
    if (paymentDataRequestJson == null) {
        return null;
    }

    PaymentDataRequest request =
            PaymentDataRequest.fromJson(paymentDataRequestJson.toString());
    return paymentsClient.loadPaymentData(request);
} getLoadPaymentDataTask">CheckoutViewModel.java

To process the result, use one of the activity result contracts in the API. This example uses GetPaymentDataResult which yields an object with information about the operation in addition to the result itself:

Kotlin

private val paymentDataLauncher = registerForActivityResult(GetPaymentDataResult()) { taskResult ->
    when (taskResult.status.statusCode) {
        CommonStatusCodes.SUCCESS -> {
            taskResult.result!!.let {
                Log.i("Google Pay result:", it.toJson())
                model.setPaymentData(it)
            }
        }
        //CommonStatusCodes.CANCELED -> The user canceled
        //AutoResolveHelper.RESULT_ERROR -> The API returned an error (it.status: Status)
        //CommonStatusCodes.INTERNAL_ERROR -> Handle other unexpected errors
    }
}CheckoutActivity.kt

Java

private final ActivityResultLauncher<Task<PaymentData>> paymentDataLauncher =
    registerForActivityResult(new GetPaymentDataResult(), result -> {
      int statusCode = result.getStatus().getStatusCode();
      switch (statusCode) {
        case CommonStatusCodes.SUCCESS:
          handlePaymentSuccess(result.getResult());
          break;
        //case CommonStatusCodes.CANCELED: The user canceled
        case AutoResolveHelper.RESULT_ERROR:
          handleError(statusCode, result.getStatus().getStatusMessage());
          break;
        case CommonStatusCodes.INTERNAL_ERROR:
          handleError(statusCode, "Unexpected non API" +
              " exception when trying to deliver the task result to an activity!");
          break;
      }
    });> paymentDataLauncher">CheckoutActivity.java

Before presenting the user with a confirmation of their purchase, extract the payment token from the PaymentData result object, and use this token to create the payment transaction with your gateway.

For more information about the result object, see the PaymentData JSON object reference.

Now, use the activity result launcher and the task to show the Google Pay payment selector:

Kotlin

private fun requestPayment() {
    val task = model.getLoadPaymentDataTask(priceCents = 1000L)
    task.addOnCompleteListener(paymentDataLauncher::launch)
}CheckoutActivity.kt

Kotlin
(coroutines)

private suspend fun requestPayment() {
    val task = model.getLoadPaymentDataTask(priceCents = 1000L)
    paymentDataLauncher.launch(task.awaitTask())
}CheckoutActivity.kt

Java

public void requestPayment(View view) {
  // The price provided to the API should include taxes and shipping.
  final Task<PaymentData> task = model.getLoadPaymentDataTask(1000L);
  task.addOnCompleteListener(paymentDataLauncher::launch);
}CheckoutActivity.java

Put it all together

The following snippet shows a complete example for a properly configured project. For the project-level setup steps, see Configure your project.

Kotlin

Activity

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.activity

import android.os.Bundle
import android.util.Log
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.viewModels
import androidx.compose.runtime.getValue
import androidx.lifecycle.compose.collectAsStateWithLifecycle
import androidx.lifecycle.lifecycleScope
import com.google.android.gms.common.api.CommonStatusCodes
import com.google.android.gms.wallet.contract.TaskResultContracts.GetPaymentDataResult
import com.google.android.gms.samples.pay.R
import com.google.android.gms.samples.pay.ui.ProductScreen
import com.google.android.gms.samples.pay.viewmodel.CheckoutViewModel
import com.google.android.gms.samples.pay.viewmodel.PaymentUiState
import com.google.android.gms.samples.pay.viewmodel.awaitTask
import kotlinx.coroutines.launch

class CheckoutActivity : ComponentActivity() {

    private val paymentDataLauncher = registerForActivityResult(GetPaymentDataResult()) { taskResult ->
        when (taskResult.status.statusCode) {
            CommonStatusCodes.SUCCESS -> {
                taskResult.result!!.let {
                    Log.i("Google Pay result:", it.toJson())
                    model.setPaymentData(it)
                }
            }
            //CommonStatusCodes.CANCELED -> The user canceled
            //AutoResolveHelper.RESULT_ERROR -> The API returned an error (it.status: Status)
            //CommonStatusCodes.INTERNAL_ERROR -> Handle other unexpected errors
        }
    }

    private val model: CheckoutViewModel by viewModels()
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContent {
            val payState: PaymentUiState by model.paymentUiState.collectAsStateWithLifecycle()
            ProductScreen(
                title = "Men's Tech Shell Full-Zip",
                description = "A versatile full-zip that you can wear all day long and even...",
                price = "$50.20",
                image = R.drawable.ts_10_11019a,
                payUiState = payState,
                onGooglePayButtonClick = this::requestPayment,
            )
        }
    }

    private fun requestPayment() {
        val task = model.getLoadPaymentDataTask(priceCents = 1000L)
        task.addOnCompleteListener(paymentDataLauncher::launch)
    }
}CheckoutActivity.kt

Util

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.util

import android.content.Context
import com.google.android.gms.samples.pay.Constants
import com.google.android.gms.wallet.PaymentsClient
import com.google.android.gms.wallet.Wallet
import org.json.JSONArray
import org.json.JSONException
import org.json.JSONObject
import java.math.BigDecimal
import java.math.RoundingMode

/**
 * Contains helper static methods for dealing with the Payments API.
 *
 * Many of the parameters used in the code are optional and are set here merely to call out their
 * existence. Please consult the documentation to learn more and feel free to remove ones not
 * relevant to your implementation.
 */
object PaymentsUtil {
    val CENTS = BigDecimal(100)

    /**
     * Create a Google Pay API base request object with properties used in all requests.
     *
     * @return Google Pay API base request object.
     * @throws JSONException
     */
    private val baseRequest = JSONObject()
        .put("apiVersion", 2)
        .put("apiVersionMinor", 0)

    /**
     * Gateway Integration: Identify your gateway and your app'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 and modify them in Constants.java.
     *
     * @return Payment data tokenization for the CARD payment method.
     * @throws JSONException
     * See [PaymentMethodTokenizationSpecification](https://developers.google.com/pay/api/android/reference/object.PaymentMethodTokenizationSpecification)
     */
    private val gatewayTokenizationSpecification: JSONObject =
        JSONObject()
            .put("type", "PAYMENT_GATEWAY")
            .put("parameters", JSONObject(Constants.PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS))

    /**
     * Card networks supported by your app and your gateway.
     *
     *
     * TODO: Confirm card networks supported by your app and gateway & update in Constants.java.
     *
     * @return Allowed card networks
     * See [CardParameters](https://developers.google.com/pay/api/android/reference/object.CardParameters)
     */
    private val allowedCardNetworks = JSONArray(Constants.SUPPORTED_NETWORKS)

    /**
     * Card authentication methods supported by your app and your gateway.
     *
     *
     * TODO: Confirm your processor supports Android device tokens on your supported card networks
     * and make updates in Constants.java.
     *
     * @return Allowed card authentication methods.
     * See [CardParameters](https://developers.google.com/pay/api/android/reference/object.CardParameters)
     */
    private val allowedCardAuthMethods = JSONArray(Constants.SUPPORTED_METHODS)

    /**
     * Describe your app's support for the CARD payment method.
     *
     *
     * The provided properties are applicable to both an IsReadyToPayRequest and a
     * PaymentDataRequest.
     *
     * @return A CARD PaymentMethod object describing accepted cards.
     * @throws JSONException
     * See [PaymentMethod](https://developers.google.com/pay/api/android/reference/object.PaymentMethod)
     */
    // Optionally, you can add billing address/phone number associated with a CARD payment method.
    private fun baseCardPaymentMethod(): JSONObject =
        JSONObject()
            .put("type", "CARD")
            .put(
                "parameters", JSONObject()
                    .put("allowedAuthMethods", allowedCardAuthMethods)
                    .put("allowedCardNetworks", allowedCardNetworks)
                    .put("billingAddressRequired", true)
                    .put(
                        "billingAddressParameters", JSONObject()
                            .put("format", "FULL")
                    )
            )

    /**
     * Describe the expected returned payment data for the CARD payment method
     *
     * @return A CARD PaymentMethod describing accepted cards and optional fields.
     * @throws JSONException
     * See [PaymentMethod](https://developers.google.com/pay/api/android/reference/object.PaymentMethod)
     */
    private val cardPaymentMethod: JSONObject = baseCardPaymentMethod()
        .put("tokenizationSpecification", gatewayTokenizationSpecification)

    val allowedPaymentMethods: JSONArray = JSONArray().put(cardPaymentMethod)

    /**
     * An object describing accepted forms of payment by your app, used to determine a viewer's
     * readiness to pay.
     *
     * @return API version and payment methods supported by the app.
     * See [IsReadyToPayRequest](https://developers.google.com/pay/api/android/reference/object.IsReadyToPayRequest)
     */
    fun isReadyToPayRequest(): JSONObject? =
        try {
            baseRequest
                .put("allowedPaymentMethods", JSONArray().put(baseCardPaymentMethod()))
        } catch (e: JSONException) {
            null
        }

    /**
     * Information about the merchant requesting payment information
     *
     * @return Information about the merchant.
     * @throws JSONException
     * See [MerchantInfo](https://developers.google.com/pay/api/android/reference/object.MerchantInfo)
     */
    private val merchantInfo: JSONObject =
        JSONObject().put("merchantName", "Example Merchant")

    /**
     * Creates an instance of [PaymentsClient] for use in an [Context] using the
     * environment and theme set in [Constants].
     *
     * @param context from the caller activity.
     */
    fun createPaymentsClient(context: Context): PaymentsClient {
        val walletOptions = Wallet.WalletOptions.Builder()
            .setEnvironment(Constants.PAYMENTS_ENVIRONMENT)
            .build()

        return Wallet.getPaymentsClient(context, walletOptions)
    }

    /**
     * Provide Google Pay API with a payment amount, currency, and amount status.
     *
     * @return information about the requested payment.
     * @throws JSONException
     * See [TransactionInfo](https://developers.google.com/pay/api/android/reference/object.TransactionInfo)
     */
    private fun getTransactionInfo(price: String): JSONObject =
        JSONObject()
            .put("totalPrice", price)
            .put("totalPriceStatus", "FINAL")
            .put("countryCode", Constants.COUNTRY_CODE)
            .put("currencyCode", Constants.CURRENCY_CODE)

    /**
     * An object describing information requested in a Google Pay payment sheet
     *
     * @return Payment data expected by your app.
     * See [PaymentDataRequest](https://developers.google.com/pay/api/android/reference/object.PaymentDataRequest)
     */
    fun getPaymentDataRequest(priceCents: Long): JSONObject =
        baseRequest
            .put("allowedPaymentMethods", allowedPaymentMethods)
            .put("transactionInfo", getTransactionInfo(priceCents.centsToString()))
            .put("merchantInfo", merchantInfo)
            .put("shippingAddressRequired", true)
            .put(
                "shippingAddressParameters", JSONObject()
                    .put("phoneNumberRequired", false)
                    .put("allowedCountryCodes", JSONArray(listOf("US", "GB")))
            )
}

/**
 * Converts cents to a string format accepted by [PaymentsUtil.getPaymentDataRequest].
 */
fun Long.centsToString() = BigDecimal(this)
    .divide(PaymentsUtil.CENTS)
    .setScale(2, RoundingMode.HALF_EVEN)
    .toString()
PaymentsUtil.kt

View model

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.viewmodel

import android.app.Application
import android.util.Log
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.viewModelScope
import com.google.android.gms.common.api.ApiException
import com.google.android.gms.common.api.CommonStatusCodes
import com.google.android.gms.samples.pay.util.PaymentsUtil
import com.google.android.gms.tasks.CancellationTokenSource
import com.google.android.gms.tasks.Task
import com.google.android.gms.wallet.IsReadyToPayRequest
import com.google.android.gms.wallet.PaymentData
import com.google.android.gms.wallet.PaymentDataRequest
import com.google.android.gms.wallet.PaymentsClient
import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.StateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.flow.update
import kotlinx.coroutines.launch
import kotlinx.coroutines.suspendCancellableCoroutine
import kotlinx.coroutines.tasks.await
import org.json.JSONException
import org.json.JSONObject
import java.util.concurrent.Executor
import kotlin.coroutines.resume

class CheckoutViewModel(application: Application) : AndroidViewModel(application) {

    private val _paymentUiState: MutableStateFlow<PaymentUiState> =
        MutableStateFlow(PaymentUiState.NotStarted)
    val paymentUiState: StateFlow<PaymentUiState> = _paymentUiState.asStateFlow()

    // A client for interacting with the Google Pay API.
    private val paymentsClient: PaymentsClient = PaymentsUtil.createPaymentsClient(application)

    init {
        viewModelScope.launch {
            verifyGooglePayReadiness()
        }
    }

    /**
     * Determine the user's ability to pay with a payment method supported by your app and display
     * a Google Pay payment button.
    ) */
    private suspend fun verifyGooglePayReadiness() {
        val newUiState: PaymentUiState = try {
            if (fetchCanUseGooglePay()) {
                PaymentUiState.Available
            } else {
                PaymentUiState.Error(CommonStatusCodes.ERROR)
            }
        } catch (exception: ApiException) {
            PaymentUiState.Error(exception.statusCode, exception.message)
        }

        _paymentUiState.update { newUiState }
    }

    /**
     * Determine the user's ability to pay with a payment method supported by your app.
    ) */
    private suspend fun fetchCanUseGooglePay(): Boolean {
        val request = IsReadyToPayRequest.fromJson(PaymentsUtil.isReadyToPayRequest().toString())
        return paymentsClient.isReadyToPay(request).await()
    }

    /**
     * Creates a [Task] that starts the payment process with the transaction details included.
     *
     * @return a [Task] with the payment information.
     * @see [PaymentDataRequest](https://developers.google.com/android/reference/com/google/android/gms/wallet/PaymentsClient#loadPaymentData(com.google.android.gms.wallet.PaymentDataRequest)
    ) */
    fun getLoadPaymentDataTask(priceCents: Long): Task<PaymentData> {
        val paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents)
        val request = PaymentDataRequest.fromJson(paymentDataRequestJson.toString())
        return paymentsClient.loadPaymentData(request)
    }

    /**
     * At this stage, the user has already seen a popup informing them an error occurred. Normally,
     * only logging is required.
     *
     * @param statusCode will hold the value of any constant from CommonStatusCode or one of the
     * WalletConstants.ERROR_CODE_* constants.
     * @see [
     * Wallet Constants Library](https://developers.google.com/android/reference/com/google/android/gms/wallet/WalletConstants.constant-summary)
     */
    private fun handleError(statusCode: Int, message: String?) {
        Log.e("Google Pay API error", "Error code: $statusCode, Message: $message")
    }

    fun setPaymentData(paymentData: PaymentData) {
        val payState = extractPaymentBillingName(paymentData)?.let {
            PaymentUiState.PaymentCompleted(payerName = it)
        } ?: PaymentUiState.Error(CommonStatusCodes.INTERNAL_ERROR)

        _paymentUiState.update { payState }
    }

    private fun extractPaymentBillingName(paymentData: PaymentData): String? {
        val paymentInformation = paymentData.toJson()

        try {
            // Token will be null if PaymentDataRequest was not constructed using fromJson(String).
            val paymentMethodData =
                JSONObject(paymentInformation).getJSONObject("paymentMethodData")
            val billingName = paymentMethodData.getJSONObject("info")
                .getJSONObject("billingAddress").getString("name")
            Log.d("BillingName", billingName)

            // Logging token string.
            Log.d(
                "Google Pay token", paymentMethodData
                    .getJSONObject("tokenizationData")
                    .getString("token")
            )

            return billingName
        } catch (error: JSONException) {
            Log.e("handlePaymentSuccess", "Error: $error")
        }

        return null
    }
}

abstract class PaymentUiState internal constructor() {
    object NotStarted : PaymentUiState()
    object Available : PaymentUiState()
    class PaymentCompleted(val payerName: String) : PaymentUiState()
    class Error(val code: Int, val message: String? = null) : PaymentUiState()
}

suspend fun <T> Task<T>.awaitTask(cancellationTokenSource: CancellationTokenSource? = null): Task<T> {
    return if (isComplete) this else suspendCancellableCoroutine { cont ->
        // Run the callback directly to avoid unnecessarily scheduling on the main thread.
        addOnCompleteListener(DirectExecutor, cont::resume)

        cancellationTokenSource?.let { cancellationSource ->
            cont.invokeOnCancellation { cancellationSource.cancel() }
        }
    }
}

/**
 * An [Executor] that just directly executes the [Runnable].
 */
private object DirectExecutor : Executor {
    override fun execute(r: Runnable) {
        r.run()
    }
}
CheckoutViewModel.kt

Constants

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay

import com.google.android.gms.wallet.WalletConstants

/**
 * This file contains several constants you must edit before proceeding.
 * Please take a look at PaymentsUtil.java to see where the constants are used and to potentially
 * remove ones not relevant to your integration.
 *
 *
 * Required changes:
 *
 *  1.  Update SUPPORTED_NETWORKS and SUPPORTED_METHODS if required (consult your processor if
 * unsure)
 *  1.  Update CURRENCY_CODE to the currency you use.
 *  1.  Update SHIPPING_SUPPORTED_COUNTRIES to list the countries where you currently ship. If this
 * is not applicable to your app, remove the relevant bits from PaymentsUtil.java.
 *  1.  If you're integrating with your `PAYMENT_GATEWAY`, update
 * PAYMENT_GATEWAY_TOKENIZATION_NAME and PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS per the
 * instructions they provided. You don't need to update DIRECT_TOKENIZATION_PUBLIC_KEY.
 *  1.  If you're using `DIRECT` integration, please edit protocol version and public key as
 * per the instructions.
 */
object Constants {
    /**
     * Changing this to ENVIRONMENT_PRODUCTION will make the API return chargeable card information.
     * Please refer to the documentation to read about the required steps needed to enable
     * ENVIRONMENT_PRODUCTION.
     *
     * @value #PAYMENTS_ENVIRONMENT
     */
    const val PAYMENTS_ENVIRONMENT = WalletConstants.ENVIRONMENT_TEST

    /**
     * The allowed networks to be requested from the API. If the user has cards from networks not
     * specified here in their account, these will not be offered for them to choose in the popup.
     *
     * @value #SUPPORTED_NETWORKS
     */
    val SUPPORTED_NETWORKS = listOf(
            "AMEX",
            "DISCOVER",
            "JCB",
            "MASTERCARD",
            "VISA")

    /**
     * The Google Pay API may return cards on file on Google.com (PAN_ONLY) and/or a device token on
     * an Android device authenticated with a 3-D Secure cryptogram (CRYPTOGRAM_3DS).
     *
     * @value #SUPPORTED_METHODS
     */
    val SUPPORTED_METHODS = listOf(
            "PAN_ONLY",
            "CRYPTOGRAM_3DS")

    /**
     * Required by the API, but not visible to the user.
     *
     * @value #COUNTRY_CODE Your local country
     */
    const val COUNTRY_CODE = "US"

    /**
     * Required by the API, but not visible to the user.
     *
     * @value #CURRENCY_CODE Your local currency
     */
    const val CURRENCY_CODE = "USD"

    /**
     * Supported countries for shipping (use ISO 3166-1 alpha-2 country codes). Relevant only when
     * requesting a shipping address.
     *
     * @value #SHIPPING_SUPPORTED_COUNTRIES
     */
    val SHIPPING_SUPPORTED_COUNTRIES = listOf("US", "GB")

    /**
     * The name of your payment processor/gateway. Please refer to their documentation for more
     * information.
     *
     * @value #PAYMENT_GATEWAY_TOKENIZATION_NAME
     */
    private const val PAYMENT_GATEWAY_TOKENIZATION_NAME = "example"

    /**
     * Custom parameters required by the processor/gateway.
     * In many cases, your processor / gateway will only require a gatewayMerchantId.
     * Please refer to your processor's documentation for more information. The number of parameters
     * required and their names vary depending on the processor.
     *
     * @value #PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS
     */
    val PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS = mapOf(
            "gateway" to PAYMENT_GATEWAY_TOKENIZATION_NAME,
            "gatewayMerchantId" to "exampleGatewayMerchantId"
    )

    /**
     * Only used for `DIRECT` tokenization. Can be removed when using `PAYMENT_GATEWAY`
     * tokenization.
     *
     * @value #DIRECT_TOKENIZATION_PUBLIC_KEY
     */
    const val DIRECT_TOKENIZATION_PUBLIC_KEY = "REPLACE_ME"

    /**
     * Parameters required for `DIRECT` tokenization.
     * Only used for `DIRECT` tokenization. Can be removed when using `PAYMENT_GATEWAY`
     * tokenization.
     *
     * @value #DIRECT_TOKENIZATION_PARAMETERS
     */
    val DIRECT_TOKENIZATION_PARAMETERS = mapOf(
            "protocolVersion" to "ECv1",
            "publicKey" to DIRECT_TOKENIZATION_PUBLIC_KEY
    )
}
Constants.kt

Java

Activity

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import androidx.activity.result.ActivityResultLauncher;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProvider;

import com.google.android.gms.common.api.CommonStatusCodes;
import com.google.android.gms.samples.pay.R;
import com.google.android.gms.samples.pay.databinding.ActivityCheckoutBinding;
import com.google.android.gms.samples.pay.util.PaymentsUtil;
import com.google.android.gms.samples.pay.viewmodel.CheckoutViewModel;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.wallet.AutoResolveHelper;
import com.google.android.gms.wallet.PaymentData;
import com.google.android.gms.wallet.button.ButtonOptions;
import com.google.android.gms.wallet.button.PayButton;
import com.google.android.gms.wallet.contract.TaskResultContracts.GetPaymentDataResult;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.Locale;

/**
 * Checkout implementation for the app
 */
public class CheckoutActivity extends AppCompatActivity {

  private CheckoutViewModel model;

  private PayButton googlePayButton;

  private final ActivityResultLauncher<Task<PaymentData>> paymentDataLauncher =
      registerForActivityResult(new GetPaymentDataResult(), result -> {
        int statusCode = result.getStatus().getStatusCode();
        switch (statusCode) {
          case CommonStatusCodes.SUCCESS:
            handlePaymentSuccess(result.getResult());
            break;
          //case CommonStatusCodes.CANCELED: The user canceled
          case AutoResolveHelper.RESULT_ERROR:
            handleError(statusCode, result.getStatus().getStatusMessage());
            break;
          case CommonStatusCodes.INTERNAL_ERROR:
            handleError(statusCode, "Unexpected non API" +
                " exception when trying to deliver the task result to an activity!");
            break;
        }
      });

  /**
   * Initialize the Google Pay API on creation of the activity
   *
   * @see Activity#onCreate(android.os.Bundle)
   */
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    initializeUi();

    // Check Google Pay availability
    model = new ViewModelProvider(this).get(CheckoutViewModel.class);
    model.canUseGooglePay.observe(this, this::setGooglePayAvailable);
  }

  private void initializeUi() {

    // Use view binding to access the UI elements
    ActivityCheckoutBinding layoutBinding = ActivityCheckoutBinding.inflate(getLayoutInflater());
    setContentView(layoutBinding.getRoot());

    // The Google Pay button is a layout file – take the root view
    googlePayButton = layoutBinding.googlePayButton;
    try {
      googlePayButton.initialize(
          ButtonOptions.newBuilder()
              .setAllowedPaymentMethods(PaymentsUtil.getAllowedPaymentMethods().toString()).build()
      );
      googlePayButton.setOnClickListener(this::requestPayment);
    } catch (JSONException e) {
      // Keep Google Pay button hidden (consider logging this to your app analytics service)
    }
  }

  /**
   * If isReadyToPay returned {@code true}, show the button and hide the "checking" text.
   * Otherwise, notify the user that Google Pay is not available. Please adjust to fit in with
   * your current user flow. You are not required to explicitly let the user know if isReadyToPay
   * returns {@code false}.
   *
   * @param available isReadyToPay API response.
   */
  private void setGooglePayAvailable(boolean available) {
    if (available) {
      googlePayButton.setVisibility(View.VISIBLE);
    } else {
      Toast.makeText(this, R.string.google_pay_status_unavailable, Toast.LENGTH_LONG).show();
    }
  }

  public void requestPayment(View view) {
    // The price provided to the API should include taxes and shipping.
    final Task<PaymentData> task = model.getLoadPaymentDataTask(1000L);
    task.addOnCompleteListener(paymentDataLauncher::launch);
  }

  /**
   * PaymentData response object contains the payment information, as well as any additional
   * requested information, such as billing and shipping address.
   *
   * @param paymentData A response object returned by Google after a payer approves payment.
   * @see <a href="https://developers.google.com/pay/api/android/reference/
   * object#PaymentData">PaymentData</a>
   */
  private void handlePaymentSuccess(PaymentData paymentData) {
    final String paymentInfo = paymentData.toJson();

    try {
      JSONObject paymentMethodData = new JSONObject(paymentInfo).getJSONObject("paymentMethodData");
      // If the gateway is set to "example", no payment information is returned - instead, the
      // token will only consist of "examplePaymentMethodToken".

      final JSONObject info = paymentMethodData.getJSONObject("info");
      final String billingName = info.getJSONObject("billingAddress").getString("name");
      Toast.makeText(
          this, getString(R.string.payments_show_name, billingName),
          Toast.LENGTH_LONG).show();

      // Logging token string.
      Log.d("Google Pay token", paymentMethodData
          .getJSONObject("tokenizationData")
          .getString("token"));

      startActivity(new Intent(this, CheckoutSuccessActivity.class));

    } catch (JSONException e) {
      Log.e("handlePaymentSuccess", "Error: " + e);
    }
  }

  /**
   * At this stage, the user has already seen a popup informing them an error occurred. Normally,
   * only logging is required.
   *
   * @param statusCode holds the value of any constant from CommonStatusCode or one of the
   *                   WalletConstants.ERROR_CODE_* constants.
   * @see <a href="https://developers.google.com/android/reference/com/google/android/gms/wallet/
   * WalletConstants#constant-summary">Wallet Constants Library</a>
   */
  private void handleError(int statusCode, @Nullable String message) {
    Log.e("loadPaymentData failed",
        String.format(Locale.getDefault(), "Error code: %d, Message: %s", statusCode, message));
  }
}
CheckoutActivity.java

Success activity

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.activity;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.samples.pay.databinding.ActivityCheckoutSuccessBinding;

public class CheckoutSuccessActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    ActivityCheckoutSuccessBinding layoutBinding = ActivityCheckoutSuccessBinding.inflate(getLayoutInflater());
    setContentView(layoutBinding.getRoot());
  }
}CheckoutSuccessActivity.java

Util

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.util;

import android.content.Context;

import com.google.android.gms.samples.pay.Constants;
import com.google.android.gms.wallet.PaymentsClient;
import com.google.android.gms.wallet.Wallet;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.math.BigDecimal;
import java.math.RoundingMode;

/**
 * Contains helper static methods for dealing with the Payments API.
 *
 * <p>Many of the parameters used in the code are optional and are set here merely to call out their
 * existence. Please consult the documentation to learn more and feel free to remove ones not
 * relevant to your implementation.
 */
public class PaymentsUtil {

  public static final BigDecimal CENTS_IN_A_UNIT = new BigDecimal(100);

  /**
   * Create a Google Pay API base request object with properties used in all requests.
   *
   * @return Google Pay API base request object.
   * @throws JSONException if the object is malformed.
   */
  private static JSONObject getBaseRequest() throws JSONException {
    return new JSONObject()
        .put("apiVersion", 2)
        .put("apiVersionMinor", 0);
  }

  /**
   * Creates an instance of {@link PaymentsClient} for use in an {@link Context} using the
   * environment and theme set in {@link Constants}.
   *
   * @param context is the caller's context.
   */
  public static PaymentsClient createPaymentsClient(Context context) {
    Wallet.WalletOptions walletOptions =
        new Wallet.WalletOptions.Builder().setEnvironment(Constants.PAYMENTS_ENVIRONMENT).build();
    return Wallet.getPaymentsClient(context, walletOptions);
  }

  /**
   * Gateway Integration: Identify your gateway and your app's gateway merchant identifier.
   *
   * <p>The Google Pay API response will return an encrypted payment method capable of being charged
   * by a supported gateway after payer authorization.
   *
   * <p>TODO: Check with your gateway on the parameters to pass and modify them in Constants.java.
   *
   * @return Payment data tokenization for the CARD payment method.
   * @throws JSONException if the object is malformed.
   * @see <a href=
   * "https://developers.google.com/pay/api/android/reference/object#PaymentMethodTokenizationSpecification">PaymentMethodTokenizationSpecification</a>
   */
  private static JSONObject getGatewayTokenizationSpecification() throws JSONException {
    return new JSONObject()
        .put("type", "PAYMENT_GATEWAY")
        .put("parameters", new JSONObject()
            .put("gateway", "example")
            .put("gatewayMerchantId", "exampleGatewayMerchantId")
        );
  }

  /**
   * {@code DIRECT} Integration: Decrypt a response directly on your servers. This configuration has
   * additional data security requirements from Google and additional PCI DSS compliance complexity.
   *
   * <p>Please refer to the documentation for more information about {@code DIRECT} integration. The
   * type of integration you use depends on your payment processor.
   *
   * @return Payment data tokenization for the CARD payment method.
   * @throws JSONException if the object is malformed.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethodTokenizationSpecification">PaymentMethodTokenizationSpecification</a>
   */
  private static JSONObject getDirectTokenizationSpecification()
      throws JSONException, RuntimeException {
    return new JSONObject()
        .put("type", "DIRECT")
        .put("parameters", new JSONObject(Constants.DIRECT_TOKENIZATION_PARAMETERS));
  }

  /**
   * Card networks supported by your app and your gateway.
   *
   * <p>TODO: Confirm card networks supported by your app and gateway & update in Constants.java.
   *
   * @return Allowed card networks
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#CardParameters">CardParameters</a>
   */
  private static JSONArray getAllowedCardNetworks() {
    return new JSONArray(Constants.SUPPORTED_NETWORKS);
  }

  /**
   * Card authentication methods supported by your app and your gateway.
   *
   * <p>TODO: Confirm your processor supports Android device tokens on your supported card networks
   * and make updates in Constants.java.
   *
   * @return Allowed card authentication methods.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#CardParameters">CardParameters</a>
   */
  private static JSONArray getAllowedCardAuthMethods() {
    return new JSONArray(Constants.SUPPORTED_METHODS);
  }

  /**
   * Describe your app's support for the CARD payment method.
   *
   * <p>The provided properties are applicable to both an IsReadyToPayRequest and a
   * PaymentDataRequest.
   *
   * @return A CARD PaymentMethod object describing accepted cards.
   * @throws JSONException if the object is malformed.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethod">PaymentMethod</a>
   */
  private static JSONObject getBaseCardPaymentMethod() throws JSONException {
    return new JSONObject()
        .put("type", "CARD")
        .put("parameters", new JSONObject()
            .put("allowedAuthMethods", getAllowedCardAuthMethods())
            .put("allowedCardNetworks", getAllowedCardNetworks())
            .put("billingAddressRequired", true)
            .put("billingAddressParameters", new JSONObject()
                .put("format", "FULL")
            )
        );
  }

  /**
   * Describe the expected returned payment data for the CARD payment method
   *
   * @return A CARD PaymentMethod describing accepted cards and optional fields.
   * @throws JSONException if the object is malformed.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethod">PaymentMethod</a>
   */
  private static JSONObject getCardPaymentMethod() throws JSONException {
    return getBaseCardPaymentMethod()
        .put("tokenizationSpecification", getGatewayTokenizationSpecification());
  }

  /**
   * Return a collection of payment methods allowed to complete the operation with Google Pay.
   *
   * @return A JSONArray object with the list of payment methods.
   * @throws JSONException if the JSON object is malformed.
   */
  public static JSONArray getAllowedPaymentMethods() throws JSONException {
    return new JSONArray().put(getCardPaymentMethod());
  }

  /**
   * An object describing accepted forms of payment by your app, used to determine a viewer's
   * readiness to pay.
   *
   * @return API version and payment methods supported by the app.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#IsReadyToPayRequest">IsReadyToPayRequest</a>
   */
  public static JSONObject getIsReadyToPayRequest() {
    try {
      return getBaseRequest()
          .put("allowedPaymentMethods", new JSONArray().put(getBaseCardPaymentMethod()));
    } catch (JSONException e) {
      return null;
    }
  }

  /**
   * Provide Google Pay API with a payment amount, currency, and amount status.
   *
   * @return information about the requested payment.
   * @throws JSONException if the object is malformed.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#TransactionInfo">TransactionInfo</a>
   */
  private static JSONObject getTransactionInfo(String price) throws JSONException {
    return new JSONObject()
        .put("totalPrice", price)
        .put("totalPriceStatus", "FINAL")
        .put("countryCode", Constants.COUNTRY_CODE)
        .put("currencyCode", Constants.CURRENCY_CODE)
        .put("checkoutOption", "COMPLETE_IMMEDIATE_PURCHASE");
  }

  /**
   * Information about the merchant requesting payment information
   *
   * @return Information about the merchant.
   * @throws JSONException if the object is malformed.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#MerchantInfo">MerchantInfo</a>
   */
  private static JSONObject getMerchantInfo() throws JSONException {
    return new JSONObject().put("merchantName", "Example Merchant");
  }

  /**
   * An object describing information requested in a Google Pay payment sheet
   *
   * @return Payment data expected by your app.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentDataRequest">PaymentDataRequest</a>
   */
  public static JSONObject getPaymentDataRequest(long priceCents) {
    try {
      final String price = PaymentsUtil.centsToString(priceCents);
      return PaymentsUtil.getBaseRequest()
          .put("allowedPaymentMethods", getAllowedPaymentMethods())
          .put("transactionInfo", getTransactionInfo(price))
          .put("merchantInfo", getMerchantInfo())
          .put("shippingAddressRequired", true)
          .put("shippingAddressParameters", new JSONObject()
              .put("phoneNumberRequired", false)
              .put("allowedCountryCodes", new JSONArray(Constants.SHIPPING_SUPPORTED_COUNTRIES))
          );

    } catch (JSONException e) {
      return null;
    }
  }

  /**
   * Converts cents to a string format accepted by {@link PaymentsUtil#getPaymentDataRequest}.
   *
   * @param cents value of the price in cents.
   */
  public static String centsToString(long cents) {
    return new BigDecimal(cents)
        .divide(CENTS_IN_A_UNIT, RoundingMode.HALF_EVEN)
        .setScale(2, RoundingMode.HALF_EVEN)
        .toString();
  }
}
PaymentsUtil.java

View model

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay.viewmodel;

import android.app.Application;
import android.util.Log;

import androidx.annotation.NonNull;
import androidx.lifecycle.AndroidViewModel;
import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;

import com.google.android.gms.samples.pay.util.PaymentsUtil;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.wallet.IsReadyToPayRequest;
import com.google.android.gms.wallet.PaymentData;
import com.google.android.gms.wallet.PaymentDataRequest;
import com.google.android.gms.wallet.PaymentsClient;

import org.json.JSONObject;

public class CheckoutViewModel extends AndroidViewModel {

    // A client for interacting with the Google Pay API.
    private final PaymentsClient paymentsClient;

    // LiveData with the result of whether the user can pay using Google Pay
    private final MutableLiveData<Boolean> _canUseGooglePay = new MutableLiveData<>();

    public CheckoutViewModel(@NonNull Application application) {
        super(application);
        paymentsClient = PaymentsUtil.createPaymentsClient(application);

        fetchCanUseGooglePay();
    }

    public final LiveData<Boolean> canUseGooglePay = _canUseGooglePay;

    /**
     * Determine the user's ability to pay with a payment method supported by your app and display
     * a Google Pay payment button.
     */
    private void fetchCanUseGooglePay() {
        final JSONObject isReadyToPayJson = PaymentsUtil.getIsReadyToPayRequest();
        if (isReadyToPayJson == null) {
            _canUseGooglePay.setValue(false);
            return;
        }

        // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
        // OnCompleteListener to be triggered when the result of the call is known.
        IsReadyToPayRequest request = IsReadyToPayRequest.fromJson(isReadyToPayJson.toString());
        Task<Boolean> task = paymentsClient.isReadyToPay(request);
        task.addOnCompleteListener(
                completedTask -> {
                    if (completedTask.isSuccessful()) {
                        _canUseGooglePay.setValue(completedTask.getResult());
                    } else {
                        Log.w("isReadyToPay failed", completedTask.getException());
                        _canUseGooglePay.setValue(false);
                    }
                });
    }

    /**
     * Creates a Task that starts the payment process with the transaction details included.
     *
     * @param priceCents the price to show on the payment sheet.
     * @return a Task with the payment information.
     */
    public Task<PaymentData> getLoadPaymentDataTask(final long priceCents) {
        JSONObject paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents);
        if (paymentDataRequestJson == null) {
            return null;
        }

        PaymentDataRequest request =
                PaymentDataRequest.fromJson(paymentDataRequestJson.toString());
        return paymentsClient.loadPaymentData(request);
    }
}CheckoutViewModel.java

Constants

/*
 * Copyright 2024 Google Inc.
 *
 * 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.
 */

package com.google.android.gms.samples.pay;

import com.google.android.gms.wallet.WalletConstants;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

/**
 * This file contains several constants you must edit before proceeding.
 * Please take a look at PaymentsUtil.java to see where the constants are used and to potentially
 * remove ones not relevant to your integration.
 *
 * <p>Required changes:
 * <ol>
 * <li> Update SUPPORTED_NETWORKS and SUPPORTED_METHODS if required (consult your processor if
 *      unsure)
 * <li> Update CURRENCY_CODE to the currency you use.
 * <li> Update SHIPPING_SUPPORTED_COUNTRIES to list the countries where you currently ship. If this
 *      is not applicable to your app, remove the relevant bits from PaymentsUtil.java.
 * <li> If you're integrating with your {@code PAYMENT_GATEWAY}, update
 *      PAYMENT_GATEWAY_TOKENIZATION_NAME and PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS per the
 *      instructions they provided. You don't need to update DIRECT_TOKENIZATION_PUBLIC_KEY.
 * <li> If you're using {@code DIRECT} integration, please edit protocol version and public key as
 *      per the instructions.
 */
public class Constants {

  /**
   * Changing this to ENVIRONMENT_PRODUCTION will make the API return chargeable card information.
   * Please refer to the documentation to read about the required steps needed to enable
   * ENVIRONMENT_PRODUCTION.
   *
   * @value #PAYMENTS_ENVIRONMENT
   */
  public static final int PAYMENTS_ENVIRONMENT = WalletConstants.ENVIRONMENT_TEST;

  /**
   * The allowed networks to be requested from the API. If the user has cards from networks not
   * specified here in their account, these will not be offered for them to choose in the popup.
   *
   * @value #SUPPORTED_NETWORKS
   */
  public static final List<String> SUPPORTED_NETWORKS = Arrays.asList(
      "AMEX",
      "DISCOVER",
      "JCB",
      "MASTERCARD",
      "VISA");

  /**
   * The Google Pay API may return cards on file on Google.com (PAN_ONLY) and/or a device token on
   * an Android device authenticated with a 3-D Secure cryptogram (CRYPTOGRAM_3DS).
   *
   * @value #SUPPORTED_METHODS
   */
  public static final List<String> SUPPORTED_METHODS = Arrays.asList(
      "PAN_ONLY",
      "CRYPTOGRAM_3DS");

  /**
   * Required by the API, but not visible to the user.
   *
   * @value #COUNTRY_CODE Your local country
   */
  public static final String COUNTRY_CODE = "US";

  /**
   * Required by the API, but not visible to the user.
   *
   * @value #CURRENCY_CODE Your local currency
   */
  public static final String CURRENCY_CODE = "USD";

  /**
   * Supported countries for shipping (use ISO 3166-1 alpha-2 country codes). Relevant only when
   * requesting a shipping address.
   *
   * @value #SHIPPING_SUPPORTED_COUNTRIES
   */
  public static final List<String> SHIPPING_SUPPORTED_COUNTRIES = Arrays.asList("US", "GB");

  /**
   * The name of your payment processor/gateway. Please refer to their documentation for more
   * information.
   *
   * @value #PAYMENT_GATEWAY_TOKENIZATION_NAME
   */
  public static final String PAYMENT_GATEWAY_TOKENIZATION_NAME = "example";

  /**
   * Custom parameters required by the processor/gateway.
   * In many cases, your processor / gateway will only require a gatewayMerchantId.
   * Please refer to your processor's documentation for more information. The number of parameters
   * required and their names vary depending on the processor.
   *
   * @value #PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS
   */
  public static final HashMap<String, String> PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS =
      new HashMap<String, String>() {{
        put("gateway", PAYMENT_GATEWAY_TOKENIZATION_NAME);
        put("gatewayMerchantId", "exampleGatewayMerchantId");
        // Your processor may require additional parameters.
      }};

  /**
   * Only used for {@code DIRECT} tokenization. Can be removed when using {@code PAYMENT_GATEWAY}
   * tokenization.
   *
   * @value #DIRECT_TOKENIZATION_PUBLIC_KEY
   */
  public static final String DIRECT_TOKENIZATION_PUBLIC_KEY = "REPLACE_ME";

  /**
   * Parameters required for {@code DIRECT} tokenization.
   * Only used for {@code DIRECT} tokenization. Can be removed when using {@code PAYMENT_GATEWAY}
   * tokenization.
   *
   * @value #DIRECT_TOKENIZATION_PARAMETERS
   */
  public static final HashMap<String, String> DIRECT_TOKENIZATION_PARAMETERS =
      new HashMap<String, String>() {{
        put("protocolVersion", "ECv2");
        put("publicKey", DIRECT_TOKENIZATION_PUBLIC_KEY);
      }};
}
Constants.java

Tutorial

Step 1: Define your payment configuration

Configure your Google Pay API version

Kotlin

Java

Request a payment token for your payment provider

Kotlin

Java

Define supported payment card networks

Kotlin

Java

Kotlin

Java

Describe your allowed payment methods

Kotlin

Java

Kotlin

Java

Step 2: Create a PaymentsClient instance

Kotlin

Java

Step 3: Determine readiness to pay with the Google Pay API

Kotlin

Java

Kotlin

Kotlin(coroutines)

Java

Step 4: Add a Google Pay payment button

Kotlin(Compose)

XML

If you are adding the Google Pay button using XML...

Kotlin

Java

Step 5: Create a PaymentDataRequest object

Kotlin

Java

Kotlin

Java

Kotlin

Java

Step 6: Initiate the payment process with Google Pay

Kotlin

Java

Kotlin

Java

Kotlin

Kotlin(coroutines)

Java

Put it all together

Kotlin

Activity

Util

View model

Constants

Java

Activity

Success activity

Util

View model

Constants

Kotlin
(coroutines)

Kotlin
(Compose)

Kotlin
(coroutines)