Process an Offline Sale {#pax-aio-pymnt-txn-offline-sale}
=========================================================

Use this information to process an offline sale. This transaction is also called a *deferred authorization* or *store-and-forward* transaction.
Offline sales can be performed only on terminals that have successfully processed at least one online transaction.  
When internet connectivity is unavailable, an offline sale enables you to capture transaction details locally. These stored transactions must be submitted for authorization when connectivity is restored. For more information, see [Submit an Offline Transactions Batch for Authorization](/docs/cybs/en-us/pax-all-in-one/integration/all/na/pax-all-in-one/pax-aio-payment-txn-intro/pax-aio-pymnt-txn-offline-intro/pax-aio-pymnt-txn-offline-submit-batch-auth.md "").
Only process offline sales when required. The recommendation is to process online sale transactions whenever possible. For more information, see [Sale](/docs/cybs/en-us/pax-all-in-one/integration/all/na/pax-all-in-one/pax-aio-payment-txn-intro/pax-aio-payment-txn-sale-task.md "").  
Follow these steps to process an offline sale.

1. Create a `TransactionParameters` object and provide the required information for the payment.

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

   ```
   // Use this to configure the maximum amount per offline transaction and maximum amount for an offline batch.
   // MposUI.offlineModule.offlineTransactionConfiguration = OfflineTransactionConfiguration(
   //            maximumAmountPerTransaction = BigDecimal("100.00"),
   //            maximumTotalAmountForBatch = BigDecimal("1000.00")
   //        )


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

   val transactionIntent = mposUi.offlineModule.createTransactionIntent(transactionParameters)
   startActivityForResult(transactionIntent, MposUi.REQUEST_CODE_PAYMENT)
   ```
3. 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()
               }
           }
       }
   }
   ```