Introduction

The aim of this document is to assist you in initiating payment acceptance from your custom application running on the Nomba Android terminal. If you encounter any difficulties with this process, feel free to reach out for support.

Trigger payments - available since NombaX Application v1.6.2

This following code snippet serves as a foundation for triggering payment events on the Nomba terminal. Adjustments to the amount, transaction reference, and other parameters can be easily made based on specific application requirements.

const val PAYMENT_OPTION_INTENT = "com.nomba.pro.feature.payment_option.ACTION_VIEW"
const val AMOUNT_DATA = "amount"
const val MERCHANT_TX_REF = "merchantTxRef"
const val TXN_RESULT = "txnResultData"
const val RECEIPT_OPTIONS = "receiptOptions"
const val ARGS_PAYMENT_OPTION_STATE = "ARGS_PAYMENT_OPTION_STATE"
const val SDK_PAYMENT_OPTIONS = "SDK_PAYMENT_OPTIONS"

val resultString = mutableStateOf("")

//setup a launcher that would help launch the intent
var paymentOptionLauncher = registerForActivityResult(
    ActivityResultContracts
        .StartActivityForResult()
) { result ->
    val data: Intent? = result.data
    if (result.resultCode == Activity.RESULT_OK) {
        resultString.value = data?.getStringExtra(TXN_RESULT) ?: "null"
    }
}

//setup an intent to be triggered
val intent = Intent(PAYMENT_OPTION_INTENT)

//put the amount to be charged
intent.putExtra(AMOUNT_DATA, "300")

//tie a reference to the payment
intent.putExtra(MERCHANT_TX_REF, "1234567890")

//handle receipt medium
val receiptOptionsMap = hashMapOf(
    "print" to true,
    "sms" to false,
    "email" to false
)
val receiptOptionsString = Json.encodeToString(serializer<HashMap<String, Boolean>>(), receiptOptionsMap)
intent.putExtra(RECEIPT_OPTIONS, receiptOptionsString)

//add extras
intent.putExtra(ARGS_PAYMENT_OPTION_STATE, SDK_PAYMENT_OPTIONS)

//launch the intent
paymentOptionLauncher.launch(intent)

public static final String PAYMENT_OPTION_INTENT = "com.nomba.pro.feature.payment_option.ACTION_VIEW";
public static final String AMOUNT_DATA = "amount";
public static final String MERCHANT_TX_REF = "merchantTxRef";
public static final String TXN_RESULT = "txnResultData";
public static final String RECEIPT_OPTIONS = "receiptOptions";
public static final String ARGS_PAYMENT_OPTION_STATE = "ARGS_PAYMENT_OPTION_STATE";
public static final String SDK_PAYMENT_OPTIONS = "SDK_PAYMENT_OPTIONS";

// Assuming you have a mutable state variable similar to mutableStateOf in Java
private MutableLiveData<String> resultString = new MutableLiveData<>();

// Setup a launcher that would help launch the intent
ActivityResultLauncher<Intent> paymentOptionLauncher = registerForActivityResult(
        new ActivityResultContracts.StartActivityForResult(),
        result -> {
            Intent data = result.getData();
            if (result.getResultCode() == Activity.RESULT_OK) {
                resultString.setValue(data.getStringExtra(TXN_RESULT));
            }
        }
);

// Setup an intent to be triggered
Intent intent = new Intent(PAYMENT_OPTION_INTENT);

// Put the amount to be charged
intent.putExtra(AMOUNT_DATA, "300");

// Tie a reference to the payment
intent.putExtra(MERCHANT_TX_REF, "1234567890");

//handle receipt medium
HashMap<String, Boolean> receiptOptionsMap = new HashMap<>();
receiptOptionsMap.put("print", true);
receiptOptionsMap.put("sms", false);
receiptOptionsMap.put("email", false);

String receiptOptionsString = Json.encodeToString(serializer(HashMap.class, Boolean.class), receiptOptionsMap);
intent.putExtra(RECEIPT_OPTIONS, receiptOptionsString);

//add extras
intent.putExtra(ARGS_PAYMENT_OPTION_STATE, SDK_PAYMENT_OPTIONS);

// Launch the intent
paymentOptionLauncher.launch(intent);

Please ensure to pass the amount as kobo i.e. 200 will charge your customer NGN 2.00

Your resultString should look like;

{
    responseCode=00, responseCodeMeaning="Completed successfully", terminalId="2KUD2XFU", 
    rrn="240117080003", formattedAmountString="₦3.00", txnType="PURCHASE", dateTime="2024-01-17 8:00:03", 
    cardPan="559441******5882", stan="575780", expiryDate="2606", cardName="00002220", 
    merchantName="Etrack Systems", providerTid="2KUD2XFU", cardScheme="Debit Mastercard"
}

Please note that the following details will make reference to the kotlin code snippet

Constants

	Description
`PAYMENT_OPTION_INTENT`	Defines the action string for the intent, indicating the type of action to be performed.
`AMOUNT_DATA`	Represents the key for passing the amount to be charged during the payment process.
`MERCHANT_TX_REF`	Represents the key for tying a reference to the payment, often used for tracking and record-keeping.
`TXN_RESULT`	Represents the key for extracting transaction result data from the intent.

State Variable

	Description
`resultString`	A mutable state variable initialized as an empty string, which is intended to store the transaction result received from the launched intent.

Intent Setup

	Description
`val intent = Intent(PAYMENT_OPTION_INTENT)`	Creates an instance of Intent with the specified action `PAYMENT_OPTION_INTENT`.
`intent.putExtra(AMOUNT_DATA, "300")`	Adds extra data to the intent, including the amount to be charged `AMOUNT_DATA` and a reference to the payment `MERCHANT_TX_REF`.

Launching the intent

	Description
`paymentOptionLauncher.launch(intent)`	Initiates the intent, triggering the Android system to display the payment options to the user.

Result Handling

Inside the result callback, the code retrieves the transaction result from the received intent and updates the resultString variable.

Getting Started

Products

API Basics

Guides

Introduction

Constants

State Variable

Intent Setup

Launching the intent

Result Handling

​Constants

​State Variable

​Intent Setup

​Launching the intent

​Result Handling

Constants

State Variable

Intent Setup

Launching the intent

Result Handling