Example

val theme = getCheckoutTheme()

// Builder class is used to construct an object passed to the SDK initializing function
val builder = Checkout
  .Builder(merchantId!!, sessionId, apiKey!!, amount!!)
  .displaySettings(displaySettings)
  .formsOfPayments(formsOfPayment)
  .theme(theme)
  .logger(Checkout.Logger.INFO)
  .build()


// Actual `init` function calling, returning a `Fragment` object  
checkoutFragment = Checkout.init(
  context = this @CheckoutSampleActivity,
  builder = builder,
  transactionResultCallback = object: Checkout.TransactionResultCallback {
    override fun onTransactionResult(result: TransactionResult) {
      showResultDialog(result)
    }
  }
)