Ask for a Tip on the Card Reader
On-Reader Tipping makes it really simple for your merchants to collect tips from their guests: At the beginning of each transaction, the guest is asked whether he wants to give a tip and then can enter the tip amount right on the card reader.
Ask for a Tip with the Pay Button
Create
MPTransactionProcessParameters
 and provide them to
createTransactionViewController
:

MPTransactionProcessParameters *pp = [MPTransactionProcessParameters parametersWithSteps:
                                                                          ^(id  _Nonnull steps)
                                                                          {
                                                                                  [steps addAskForTipStepWithSuggestedAmount:nil];
                                                                          }];

UIViewController *viewController =
        [ui createTransactionViewControllerWithTransactionParameters:tp
                                                                                           
processParameters
:pp
                                                                                                           completed:/*...*/];
Ask for a Tip with the mPOS SDK
Create
MPTransactionProcessParameters
 and provide them to
startTransactionWithParameters
:

MPTransactionProcessParameters *pp = [MPTransactionProcessParameters parametersWithSteps:
                                                                          ^(id  _Nonnull steps)
                                                                          {
                                                                                  [steps addAskForTipStepWithSuggestedAmount:nil];
                                                                          }];

MPTransactionProcess *process =
[transactionProvider startTransactionWithParameters:transactionParameters
                                                                accessoryParameters:accessoryParameters
                                                                  
processParameters
:pp
                                                                                 registered:/*...*/
                                                                          statusChanged:/*...*/
                                                                         actionRequired:/*...*/
                                                                                  completed:/*...*/];
Get the Tip Amount
After the transacton has been completed, you can access the included tip amount via the
details.includedTipAmount
 property of the
MPTransaction
 object that you receive as part of the
completed
 block:

NSLog(@"Included Tip: %@",transaction.details.includedTipAmount);
Ask for a Tip on the Card Reader
On-Reader Tipping makes it really easy for your merchants to collect tips from their guests: At the beginning of each transaction, the guest is asked whether he wants to give a tip and then can enter the tip amount right on the card reader.
Ask for a Tip with the PayButton
Create
TransactionProcessParameters
 and provide them to
createTransactionIntent
:

TransactionProcessParameters transactionProcessParameters = new TransactionProcessParameters.Builder()
                .addAskForTipStep()
                .build();

Intent intent = MposUi.getInitializedInstance().createTransactionIntent(params, 
transactionProcessParameters
);
startActivityForResult(intent, MposUi.REQUEST_CODE_PAYMENT);
Ask for a Tip with the mPOS SDK
Create
TransactionProcessParameters
 and provide them to
startTransaction
:

TransactionProcessParameters transactionProcessParameters = new TransactionProcessParameters.Builder()
                .addAskForTipStep()
                .build();

TransactionProcess paymentProcess = 
    transactionProvider.startTransaction(transactionParameters,
                                         accessoryParameters, 
                                         
transactionProcessParameters
, this);
Get the Tip Amount
You can access the included tip amount via the
getDetails().getIncludedTipAmount()
 method of the
Transaction
 object:

System.out.println("Included Tip: " + transaction.getDetails().getIncludedTipAmount());