Sale with Merchant-Defined Data Details {#ttp-payment-txn-sale-merch-defined-data-details}
==========================================================================================

Use this information to process a sale with merchant-defined data details. This transaction includes required merchant-defined data details in the payment request.  
Follow these steps to process a sale with merchant-defined data details.

1. Create an `AdditionalDetails` object and set one or more merchant defined data fields.

   ```
   val mddDetails = AdditionalDetailsBuilder()
           .mddDetails(
               MddDetailsBuilder()
                   .field1("value1")
                   .field2("value2")
                   .field3("value3")
                   .field4("value4")
                   .field5("value5")
                   .field6("value6")
                   .field7("value7")
                   .field8("value8")
                   .field9("value9")
                   .field10("value10")
                   .field11("value11")
                   .field12("value12")
                   .field13("value13")
                   .field14("value14")
                   .field15("value15")
                   .field16("value16")
                   .field17("value17")
                   .field18("value18")
                   .field19("value19")
                   .field20("value20")
                   .build()
           )
           .build()
   ```
2. Create a `TransactionParameters` object and provide the required information for the payment.

3. Retrieve the `transactionIntent` variable from the `mposUi` object and use the `startActivity` method to initiate the transaction flow.

   ```
   val transactionParameters = TransactionParameters.Builder()
               .charge(BigDecimal("1.00"), Currency.EUR)
               .customIdentifier("yourReferenceForTheTransaction")
               .additionalDetails(mddDetails)
               .build()

   val transactionIntent = mposUi.createTransactionIntent(transactionParameters)
   startActivityForResult(transactionIntent, MposUi.REQUEST_CODE_PAYMENT)
   ```
4. After the transaction is complete and the Summary screen is dismissed, the `onActivityResult` method is triggered. This action returns information about the last transaction.

   ```
   override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?)
   {
       super.onActivityResult(requestCode, resultCode, data)

       if (requestCode == MposUi.REQUEST_CODE_PAYMENT) {
           when (resultCode) {
               // Result code from a successful transaction
               MposUi.RESULT_CODE_APPROVED -> {
                  val transactionIdentifier = data?.getStringExtra(MposUi.RESULT_EXTRA_TRANSACTION_IDENTIFIER)
                  Toast.makeText(findViewById(android.R.id.content),"Transaction approved!\nIdentifier: $transactionIdentifier", Toast.LENGTH_LONG).show()
               }
               // Result code from a declined, aborted or failed transaction
               MposUi.RESULT_CODE_FAILED -> {
                  Toast.makeText(findViewById(android.R.id.content), "Transaction was declined, aborted, or failed", Toast.LENGTH_LONG).show()
               }
           }
       }
   }
   ```
5. Get the full transaction object by retrieving the `latestTransaction` property from the `mposUi` object.

   ```
   val transactionObject = mposUi.latestTransaction
   ```