Headless SDK (Enrollment Android)

The Yuno Headless SDK for Android provides a flexible, UI-free solution for enrolling payment methods and tokenizing cards.

This SDK offers complete control over the payment method enrollment process, making it ideal for merchants who:

• Need full control over the UI and user experience
• Want to implement custom enrollment flows
• Require advanced integration capabilities

The Headless SDK includes core features like:

• Card tokenization
• Secure payment method enrollment
• Direct API access
• Custom error handling

For merchants requiring a pre-built UI solution or simpler integration, consider using our other SDK implementations:

• Full SDK
• Lite SDK

Requirements

Before starting the Yuno Android SDK integration, make sure your project meets the technical requirements. In addition, ensure the following prerequisites are in place:

• You must have an active Yuno account
• To perform the integration, you'll need your Yuno API credentials:
  • account_id
  • public-api-key
  • private-secret-key

You can obtain these credentials from the Developers section of the Yuno dashboard. They are required to:

• Create a customer, which is required before enrolling payment methods
• Create a customer_session, which initializes the enrollment flow

Step 1: Create a customer

Before enrolling payment methods, you need to create a customer using the Create Customer endpoint.

Prerequisites:

• Active Yuno account
• API credentials

Required for:

• Identifying the person enrolling the payment method
• Enabling saved payment method functionality
• Tracking enrollment history
• Store the customer ID securely; you'll need it for the next step.

Step 2: Create a customer session

Create a new customer_session using the Create Customer Session endpoint.

Prerequisites:

• Customer ID from Step 1
• API credentials

Required actions:

• Include the customer ID in the request
• Store the returned customer_session ID
• Generate a new customer_session for each payment method enrollment.

Step 3: Add the SDK to your project

Prerequisites:

• Android project setup
• Gradle configuration access

1. Add the repository source:

maven { url "https://yunopayments.jfrog.io/artifactory/snapshots-libs-release" }

2. Add the SDK dependency:

dependencies {
    implementation 'com.yuno.payments:android-sdk:{last_version}'
}

Step 4: Initialize Headless SDK with the public key

First, retrieve your public API keys from the Yuno dashboard.

If you haven't implemented a custom application, create one. In the onCreate() method of your application class, call the initialize function (Yuno.initialize) as shown in the example below:

class CustomApplication : Application() {
  override fun onCreate() {
    super.onCreate()
    Yuno.initialize(
      this,
      "your api key",
      config: YunoConfig, // This is a data class to use custom configs in the SDK.
    )
  }
}

Step 5: Create a customer session

To start the enrollment process, you need to:

1. Create a customer using the Create Customer endpoint. The response will include the customer id.

2. Create a customer session using:

   • The customer id from step 1
   • The Create Customer Session endpoint

The endpoint response will provide the customer_session value required for enrollment.

Step 6: Create an enrollment payment method object

To set up the Headless SDK integration for enrollment, you need to create an enrollment payment method object using the Enroll Payment Method endpoint. When creating this object, specify which payment method type your customer can enroll in. Currently, the Headless SDK only supports the CARD payment method type.

Step 7: Start the enrollment process

To start the enrollment process, use the apiClientEnroll function. This function requires configuration parameters that define how the enrollment will be processed. The following table describes the required parameters.

The following code block presents an example of the parameter configuration.

override fun onCreate(savedInstanceState: Bundle?) {
	val apiClientEnroll = Yuno.apiClientEnroll(
    // country can be one of the following: https://docs.y.uno/docs/country-coverage-yuno-sdk
  	country_code = "CO",
    
		// The customer_session created in https://docs.y.uno/reference/create-customer-session
    customerSession = "eec6578e-ac2f-40a0-8065-25b5957f6dd3",

    context = this ->  it´s the context of your activity 
  )
 }

Step 8: Generate a vaulted token

After collecting all required customer information, create a vaulted_token using the apiClientEnroll.continueEnrollment function. Since this is an asynchronous function, use a try/catch block to handle any errors that may occur. The following example demonstrates how to create a vaulted_token:

/**
 * Create Token
 * This function will trigger an error if there is missing data.
 * You can catch this error using a try/catch block.
 */
apiClientEnroll.continueEnrollment( 
 collectedData = EnrollmentCollectedData(
   	// The customer_session created in https://docs.y.uno/reference/create-customer-session
    customerSession = "customer_session",
   	// The necessary info to use the payment method structure
    paymentMethod = EnrollmentMethod(
           type = "CARD",
           card = CardData(
               save = true,
               detail = Detail(
                   expirationMonth = 11,
                   expirationYear = 55,
                   number = "4111111111111111",
                   securityCode = "123",
                   holderName = "Firstname Lastname",
                 	// Use `CardType.DEBIT` or `CardType.CREDIT` for the card type.
                   type = CardType.DEBIT
               ),
           customer = Customer(
             	 // You can check the object here: https://docs.y.uno/reference/the-customer-object
            	 // You create the customer using the following endpoint: https://docs.y.uno/reference/create-customer
               id = "id",
               merchantCustomerId = "merchant_customer_id",
               firstName = "firstName",
             	  email = "[email protected]",
               country = "CO",
               document = Document(
                   documentType = "PAS",
                   documentNumber = "PAS12312"
               ),
             phone = Phone(
                   number = "321123321123",
                   country_code = "57"
               )
            )
      )
   ),
  context = this
 )

The apiClientEnroll.continueEnrollment function returns an Observable type that extends LiveData. You can observe the response as a standard LiveData with type SingleLiveEvent<Map<String, Any?>>. This LiveData emits only once and returns a Map containing the complete response. Below is an example response from calling apiClientEnroll.continueEnrollment:

{
  "vaulted_token": "9104911d-5df9-429e-8488-ad41abea1a4b",
  "status": "SUCCEEDED",
  "customer": {
    "session": "eec6578e-ac2f-40a0-8065-25b5957f6dd3"
  }
}

The code block below presents an example of observing the response:

apiClientPayment.continueEnrollment(data, context).observe(context) { response ->
   val status = response["status"] as String?
   val vauldtedtoken = response["vaulted_token"] as String?
}