class PaymentRequest {
    final String transactionId;
    final float payment;
    boolean paid;
  }

  public PaymentService(PaymentDatabase db, Exception... exc) {
    super(db, exc);
  }

  /**
   * Public method which will receive request from {@link com.iluwatar.commander.Commander}.
   */

  public String receiveRequest(Object... parameters) throws DatabaseUnavailableException {<FILL_FUNCTION_BODY>

    //it could also be sending an userid, payment details here or something, not added here
    var id = generateId();
    var req = new PaymentRequest(id, (float) parameters[0]);
    return updateDb(req);
  
<methods>public transient abstract java.lang.String receiveRequest(java.lang.Object[]) throws com.iluwatar.commander.exceptions.DatabaseUnavailableException<variables>private static final java.lang.String ALL_CHARS,private static final java.security.SecureRandom RANDOM,private static final Hashtable<java.lang.String,java.lang.Boolean> USED_IDS,protected final non-sealed Database#RAW database,public ArrayList<java.lang.Exception> exceptionsList