Ответ
Код:
public class Constants
  public static final int QIWI_SUM_MIN = 100;
  public static final int QIWI_SUM_MAX = 5000;
  public static final String QIWI_COMMENT = "Пополнение счета по договору №{CONTRACT_TITLE}";
  public static final String QIWI_URL_GATE = "https://w.qiwi.ru/externalorder.action";
  public static final String QIWI_PAYMENT_COMMENT = "Оплата через платежный сервис QIWI [транзакция #{TRANSACTION_ID}]";
  public static final String KEY_QIWI_SUM_MIN = "qiwi.sum.min";
  public static final String KEY_QIWI_SUM_MAX = "qiwi.sum.max";
  public static final String KEY_QIWI_COMMENT = "qiwi.comment";
  public static final String KEY_QIWI_SHOP_ID = "qiwi.shop.id";
  public static final String KEY_QIWI_LOGIN = "qiwi.login";
  public static final String KEY_QIWI_PASSWORD = "qiwi.password";
  public static final String KEY_QIWI_URL_GATE = "qiwi.gate.url";
  public static final String KEY_QIWI_URL_FAIL = "qiwi.fail.url";
  public static final String KEY_QIWI_URL_SUCCESS = "qiwi.success.url";
  public static final String KEY_QIWI_PAYMENT_TYPE_ID = "qiwi.payment.type.id";
  public static final String KEY_QIWI_PAYMENT_COMMENT = "qiwi.payment.comment";
  public static final String KEY_QIWI_ADDITIONAL_IDENTIFY_KEY_PID = "qiwi.additional.identify.key.pid";
}