MPTransactionProvider* transactionProvider = [MPMpos transactionProviderForMode::<TEST or LIVE, loaded from your backend:< merchantIdentifier::<MerchantIdentifier loaded from your backend:< merchantSecretKey::<MerchantSecretKey loaded from your backend:< ];
final TransactionProvider transactionProvider = Mpos.createTransactionProvider(this, <TEST or LIVE, loaded from your backend>, <MerchantIdentifier loaded from your backend>, <MerchantSecretKey loaded from your backend>);