question

The Secure Payments application will offer tenders to the customer, but it offers customer facing tenders, not merchant facing tenders. Most of the existing tenders (cash, check, etc.) are merchant facing tenders. So if you wanted to offer your own tender type in Secure Payments, you could do that*. It however does not offer the standard merchant-facing tenders to the customer.

The main flows today are setup to allow the merchant to choose the tender. We do not currently provide a customer-facing screen that will have all of the tender options available in the merchant facing flows.

If you wish to initiate a merchant-facing payment flow, you can either do this,

Start the Payments application. You must provide the order ID for an existing order (that you've created or has been created by some other application).

Intent payIntent = new Intent(Intents.ACTION_CLOVER_PAY);
payIntent.putExtra(Intents.EXTRA_ORDER_ID, orderId);
payIntent.putExtra(Intents.EXTRA_TRANSACTION_TYPE, Intents.TRANSACTION_TYPE_PAYMENT);

startActivityForResult(payIntent, requestCode);

Or, start the Sale app with a given amount.

Intent payIntent = new Intent(Intents.ACTION_MANUAL_PAY);
payIntent.putExtra(Intents.EXTRA_AMOUNT, amount);

startActivityForResult(payIntent, requestCode);