Как добавить в ЛК вывод необходимой суммы для открытия договора

import ru.bitel.bgbilling.common.BGMessageException;
 
import javax.jws.WebService;
import java.math.BigDecimal;
 
@WebService
public interface MyBGBillingService {
 
    BigDecimal getNpayDebetUnlockSumm(int contractId) throws BGMessageException;
 
}

import bitel.billing.server.admin.errorlog.AlarmSender;
import bitel.billing.server.admin.errorlog.bean.AlarmErrorMessage;
import bitel.billing.server.contract.bean.ContractManager;
import org.apache.log4j.Logger;
import ru.bitel.bgbilling.common.BGException;
import ru.bitel.bgbilling.common.BGMessageException;
import ru.bitel.bgbilling.kernel.container.service.server.AbstractService;
import ru.bitel.bgbilling.modules.npay.server.bean.DebetStatusManageConfig;
import ru.bitel.bgbilling.server.util.ModuleSetup;
import ru.bitel.bgbilling.server.util.ServerUtils;
 
import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;
import javax.jws.WebService;
import java.math.BigDecimal;
import java.sql.Connection;
 
@WebService(
        endpointInterface = "ru.xxx.MyBGBillingService"
)
public class MyBGBillingServiceImpl
        extends AbstractService implements MyBGBillingService {
 
    private final static Logger logger = Logger.getLogger(MyBGBillingServiceImpl.class);
    private final static int NPAY_MID = 3;
    private Connection con;
 
    public MyBGBillingServiceImpl() {
    }
 
    @PostConstruct
    protected void init() {
        this.con = this.getConnection();
    }
 
    @PreDestroy
    private void destroy() {
        if (con != null) {
            ServerUtils.commitConnection(this.con);
            ServerUtils.closeConnection(this.con);
        }
    }
 
    @Override
    public BigDecimal getNpayDebetUnlockSumm(int contractId) throws BGMessageException {
        BigDecimal result = null;
        try (ContractManager contractManager = new ContractManager(this.con)) {
            ModuleSetup moduleSetup = new ModuleSetup(this.con, NPAY_MID);
            DebetStatusManageConfig debetStatusManageConfig = new DebetStatusManageConfig(moduleSetup);
            result = debetStatusManageConfig.getSummaForUnlock(this.con, NPAY_MID, contractManager.getContractById(contractId));
        } catch (BGException e) {
            AlarmSender.sendAlarm(new AlarmErrorMessage("mybgbilling.getNpayDebetUnlockSumm", "Ошибка при получении суммы разблокировки в скрипте " + MyBGBillingServiceImpl.class, "Что-то случилось в наших лесах. Ошибка на договоре с id=" + contractId + " при получении суммы разблокировки\n" + e), System.currentTimeMillis());
        }
        return result;
    }
}

/standalone/deployments/MyBGBilling.war/WEB-INF/dyn

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ru.bitel.bgbilling.common.BGException;
import ru.bitel.mybgbilling.kernel.common.AbstractBean;
import ru.bitel.mybgbilling.kernel.common.inject.BGInject;
import ru.bitel.mybgbilling.kernel.common.inject.BGInjection;
import ru.ellco.bgbilling.kernel.scripts.mybgbilling.MyBGBillingService;
 
import javax.faces.bean.ViewScoped;
import javax.inject.Named;
import java.io.Serializable;
import java.math.BigDecimal;
 
@Named
@ViewScoped
@BGInjection
public class MyNPayBean extends AbstractBean implements Serializable {
 
    private static final Logger logger = LoggerFactory.getLogger(MyNPayBean.class);
 
    @BGInject
    private MyBGBillingService myBGBillingService;
 
    @Override
    protected void init() throws BGException {
        populate();
    }
 
    public void populate() throws BGException {
    }
 
    public BigDecimal getNpayDebetUnlockSumm() throws BGException {
        return this.myBGBillingService.getNpayDebetUnlockSumm(this.getContractId());
    }
}

/standalone/deployments/MyBGBilling.war/WEB-INF/dyn/ru/xxx/MyBGBillingService.java

dynservice:ru.xxx.MyBGBillingService=ru.xxx.MyBGBillingServiceImpl

<ui:fragment rendered="#{myNPayBean.getNpayDebetUnlockSumm() != null}">
   <tr>
      <td class="col-md-2">Сумма к пополнению:</td>
      <td><h:outputText value="#{myNPayBean.getNpayDebetUnlockSumm()}">
            <f:converter binding="#{currencyConverter}"/>
         </h:outputText>
      </td>
   </tr>
</ui:fragment>