WeChat Pay Drop-in integration

Add WeChat Pay to an existing Drop-in integration.

WeChat Pay is supported from Android Drop-in version 3.5.0 and later. For more information, see release notes.

Our Android Drop-in renders WeChat Pay in your payment form, and triggers the app switch from your app to the WeChat app on the shopper's device.

Before you begin

This page explains how to add WeChat Pay to your existing Android Drop-in integration. The Android Drop-in integration works the same way for all payment methods. If you haven't done this integration yet, refer to our Drop-in integration guide.

Before starting your WeChat Pay in-app integration:

Make sure that you have set up your back end implementation, and added Drop-in to your payment form.
Add WeChat Pay in your test Customer Area.
Create a developer account on the WeChat Open Platform.
Register your mobile app with WeChat.

Show WeChat Pay in your payment form

Drop-in uses the countryCode and the amount.currency from your /paymentMethods request to show the available payment methods to your shopper.

To show WeChat Pay in your payment form, specify in your /paymentMethods request:

countryCode: Any supported country. For example, CN.
amount.currency: Any supported currency. For example, CNY.

WeChat Pay is only shown in the payment form if WeChat app is available in the shopper's device.

Make a payment

When the shopper proceeds to pay, Drop-in returns the paymentComponentData.paymentMethod.

Pass the paymentComponentData.paymentMethod to your server.

From your server, make a /payments request, specifying:

paymentMethod: The paymentComponentData.paymentMethod from your client app.

https://docs.adyen.com/payment-methods/wechat-pay/wechat-pay-in-app-payments/android-drop-in#wechat-payments

curl https://checkout-test.adyen.com/v66/payments \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
  "merchantAccount":"YOUR_MERCHANT_ACCOUNT",
  "reference":"YOUR_ORDER_NUMBER",
  "amount":{
    "currency":"CNY",
    "value":1000
  },
  "{hint:state.data.paymentMethod from onSubmit}paymentMethod{/hint}":{
    "type":"wechatpaySDK"
  }
}'

# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen::Client.new
adyen.api_key = "YOUR_X-API-KEY"
 
response = adyen.checkout.payments({
  :amount => {
    :currency => "CNY",
    :value => 1000
  },
  :reference => "YOUR_ORDER_NUMBER",
  :paymentMethod => {
    :type => "wechatpaySDK"
  },
  :merchantAccount => "YOUR_MERCHANT_ACCOUNT"
})

// Set YOUR_X-API-KEY with the API key from the Customer Area.
// Change to Environment.LIVE and add the Live URL prefix when you're ready to accept live payments.
    Client client = new Client("YOUR_X-API-KEY", Environment.TEST);
    Checkout checkout = new Checkout(client);

    PaymentsRequest paymentsRequest = new PaymentsRequest();

    String merchantAccount = "YOUR_MERCHANT_ACCOUNT";
    paymentsRequest.setMerchantAccount(merchantAccount);

    Amount amount = new Amount();
    amount.setCurrency("CNY");
    amount.setValue(15000L);
    paymentsRequest.setAmount(amount);

    DefaultPaymentMethodDetails paymentMethodDetails = new DefaultPaymentMethodDetails();
    paymentMethodDetails.setType("wechatpaySDK");
    paymentsRequest.setPaymentMethod(paymentMethodDetails);

    paymentsRequest.setReference("YOUR_ORDER_NUMBER");

    PaymentsResponse paymentsResponse = checkout.payments(paymentsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
$client = new \Adyen\Client();
$client->setXApiKey("YOUR_X-API-KEY");
$service = new \Adyen\Service\Checkout($client);

$params = array(
  "amount" => array(
    "currency" => "CNY",
    "value" => 1000
  ),
  "reference" => "YOUR_ORDER_NUMBER",
  "paymentMethod" => array(
    "type" => "wechatpaySDK"
  ),
  "merchantAccount" => "YOUR_MERCHANT_ACCOUNT"
);
$result = $service->payments($params);

#Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen.Adyen()
adyen.client.xapikey = 'YOUR_X-API-KEY'

result = adyen.checkout.payments({
   'amount': {
      'value': 1000,
      'currency': 'CNY'
   },
   'reference': 'YOUR_ORDER_NUMBER',
   'paymentMethod': {
      'type': 'wechatpaySDK'
   },
   'merchantAccount': 'YOUR_MERCHANT_ACCOUNT'
})

// Set your X-API-KEY with the API key from the Customer Area.
var client = new Client ("YOUR_X-API-KEY", Environment.Test);
var checkout = new Checkout(client);

var amount = new Model.Checkout.Amount("CNY", 1000);
var details = new Model.Checkout.DefaultPaymentMethodDetails{
  Type = "wechatpaySDK"
};
var paymentRequest = new Adyen.Model.Checkout.PaymentRequest
{
  Reference = "YOUR_ORDER_NUMBER",
  Amount = amount,
  MerchantAccount = "YOUR_MERCHANT_ACCOUNT",
  PaymentMethod = details
};

var paymentResponse = checkout.Payments(paymentsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
const {Client, Config, CheckoutAPI} = require('@adyen/api-library');
const config = new Config();
// Set your X-API-KEY with the API key from the Customer Area.
config.apiKey = '[API_KEY]';
config.merchantAccount = '[YOUR_MERCHANT_ACCOUNT]';
const client = new Client({ config });
client.setEnvironment("TEST");
const checkout = new CheckoutAPI(client);
checkout.payments({
    amount: { currency: "CNY", value: 1000 },
    paymentMethod: {
        type: 'wechatpaySDK'
    },
    reference: "YOUR_ORDER_NUMBER",
    merchantAccount: config.merchantAccount
}).then(res => res);

The /payments response includes an action object that contains information about the app switch.

Store the action.paymentData on your server, and pass the action object to your client app.

https://docs.adyen.com/payment-methods/wechat-pay/wechat-pay-in-app-payments/android-drop-in#-payments-response

/payments response

{
    "resultCode": "Pending",
    "action": {
        "{hint:Store this on your server}paymentData{/hint}": "Ab02b4c0!BQABAgAgx==...",
        "paymentMethodType": "wechatpaySDK",
        "type": "wechatpaySDK",
        "sdkData": {
            "appid": "wx3aed7fe146f6a57a",
            "noncestr": "cPY0e83ny4hWyf5O",
            "packageValue": "Sign=WXPay",
            "partnerid": "205287714",
            "prepayid": "wx015678064827111da2e4f0b11005864100",
            "sign": "169FD3F1E193446D90C45573EBDD4020",
            "timestamp": "1573033086"
        }
    },
    "details": [
        {
            "key": "resultCode",
            "type": "text"
        }
    ],
    ...
}

Check the payment result

Drop-in uses the action object to launch the WeChat app, where the shopper completes the payment, and is then redirected back to your app. When the shopper returns to your app, Drop-in provides the actionComponentData object.

From your server, make a /payments/details request containing:

details: The actionComponentData.details from Drop-in.
paymentData: The value from the /payments response.

https://docs.adyen.com/payment-methods/wechat-pay/wechat-pay-in-app-payments/android-drop-in#wechat-paymentdetails

curl https://checkout-test.adyen.com/v66/payments/details \
-H "x-API-key: YOUR_X-API-KEY" \
-H "content-type: application/json" \
-d '{
   "{hint:actionComponentData from app}details{/hint}": {
      "resultCode": "0"
   },
   "{hint:Value that you stored on your server}paymentData{/hint}":"Ab02b4c0!BQABAgAKspbjN8+5..."
}'

# Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen::Client.new
adyen.env = :test
adyen.api_key = "YOUR_X-API-KEY"

request = DROPIN_ACTION_COMPONENT_DATA
#  Data object passed from actionComponentData from the client app, parsed from JSON to a Hash.

response = adyen.checkout.payments.details(request)

# Check if further action is needed.
if response.body.has_key(:action)
   # Pass the action object to your frontend
   puts response.body[:action]
else
   # No further action needed, pass the resultCode to your frontend
   puts response.body[:resultCode]
end

// Set your X-API-KEY with the API key from the Customer Area.
Client client = new Client(xApiKey,Environment.TEST);

Checkout checkout = new Checkout(client);
PaymentsDetailsRequest paymentsDetailsRequest = new PaymentsDetailsRequest();
HashMap<String, String> details = new HashMap<>();
details.put("resultCode", "0");
paymentsDetailsRequest.setDetails(details);
paymentsDetailsRequest.setPaymentData("Ab02b4c0!BQABAgAKspbjN8+5...");
PaymentsResponse paymentsResponse = checkout.paymentsDetails(paymentsDetailsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
$client = new \Adyen\Client();
$client->setXApiKey("YOUR_X-API-KEY");
$service = new \Adyen\Service\Checkout($client);

$params = DROPIN_ACTION_COMPONENT_DATA;
//  Data object passed from actionComponentData from the client app, parsed from JSON to an array

$result = $service->paymentsDetails($params);

// Check if further action is needed
if (array_key_exists("action", $result){
   // Pass the action object to your frontend.
   // $result["action"]
}
else {
   // No further action needed, pass the resultCode to your front end
   // $result['resultCode']
}

#Set your X-API-KEY with the API key from the Customer Area.
adyen = Adyen.Adyen()
adyen.client.xapikey = 'YOUR_X-API-KEY'

request = DROPIN_ACTION_COMPONENT_DATA
#  Data object passed from actionComponentData from the client app, parsed from JSON to a dictionary

result = adyen.checkout.payments_details(request)

# Check if further action is needed.
if 'action' in result.message:
   # Pass the action object to your front end
   # result.message['action']
else:
   # No further action needed, pass the resultCode to your front end
   # result.message['resultCode']

// Set your X-API-KEY with the API key from the Customer Area.
var client = new Client ("YOUR_X-API-KEY", Environment.Test);
var checkout = new Checkout(client);
string paymentData = "Ab02b4c0!BQABAgAKspbjN8+5...";

var details = new Dictionary<string, string>
{
  { "resultCode", "0" }
};
var paymentsDetailsRequest = new Model.Checkout.PaymentsDetailsRequest(Details: details);
var paymentResponse = checkout.PaymentDetails(paymentsDetailsRequest);

// Set your X-API-KEY with the API key from the Customer Area.
const {Client, Config, CheckoutAPI} = require('@adyen/api-library');
const config = new Config();
// Set your X-API-KEY with the API key from the Customer Area.
config.apiKey = '[API_KEY]';
config.merchantAccount = '[YOUR_MERCHANT_ACCOUNT]';
const client = new Client({ config });
client.setEnvironment("TEST");
const checkout = new CheckoutAPI(client);
checkout.paymentsDetails({
     details: {DROPIN_ACTION_COMPONENT_DATA}  // Data object passed from the client app.
}).then(res => res);

Present the payment result

Use the resultCode that you received in the /payments/details response to present the payment result to your shopper.

The resultCode values you can receive for WeChat Pay are:

resultCode	Description	Action to take
Authorised	The payment was successful.	Inform the shopper that the payment has been successful. You will receive the funds in 2-3 days.
Cancelled	The shopper cancelled the payment while on the WeChat app.	Ask the shopper whether they want to continue with the order, or ask them to select a different payment method.
Error	There was an error when the payment was being processed.	Inform the shopper that there was an error processing their payment. The response contains a `refusalReason`, indicating the cause of the error.
Pending or Received	The payment order was successfully received.	Inform the shopper that you've received their order, and are waiting for the payment to clear. You will receive the final result of the payment in an AUTHORISATION notification. If successful, you will receive the funds in 2 days.
Refused	The payment was refused by the shopper's bank.	Ask the shopper to try the payment again using a different payment method.

Test and go live

WeChat Pay currently has no test platform. If you have a personal WeChat account you can test your integration by either:

Cancelling the transaction when you are asked to verify the payment (recommended).
Making live WeChat Pay payments with a low value.

You can check the status of a WeChat Pay payment in your Customer Area > Transactions > Payments.

Before you can accept live WeChat Pay payments, you need to submit a request for WeChat Pay in your live Customer Area.