DIP Implementation

class PaymentService {
 
    private let _database: Database
    
    init(database: Database) {
        _database = database
    }
 
    func paymentIsValid() {
       // Implementation code
    }
    
    func openDatabase() {
       // Implementation code
    }
    
    func addNewPayment() {
       // Implementation code
    }
    
    func removePaymentByID() {
       // Implementation code
    }
    
    func updatePaymentByID() {
       // Implementation code
    }
}