Refactor Loan Transaction to support auditable fields

fineract-provider/src/main/java/org/apache/fineract/infrastructure/core/service/DateUtils.java

@@ -20,6 +20,7 @@ package org.apache.fineract.infrastructure.core.service;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
@@ -73,6 +74,11 @@ public final class DateUtils {
         return LocalDateTime.now(zone).truncatedTo(ChronoUnit.SECONDS);
     }
 
+    public static OffsetDateTime getOffsetDateTimeOfTenant() {
+        final ZoneId zone = getDateTimeZoneOfTenant();
+        return OffsetDateTime.now(zone).truncatedTo(ChronoUnit.SECONDS);
+    }
+
     public static LocalDateTime getLocalDateTimeOfSystem() {
         return LocalDateTime.now(ZoneId.systemDefault()).truncatedTo(ChronoUnit.SECONDS);
     }

fineract-provider/src/main/java/org/apache/fineract/portfolio/collateralmanagement/data/LoanTransactionData.java

@@ -19,7 +19,7 @@
 package org.apache.fineract.portfolio.collateralmanagement.data;
 
 import java.math.BigDecimal;
-import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 
 public final class LoanTransactionData {
 
@@ -29,9 +29,9 @@ public final class LoanTransactionData {
 
     private final Long loanId;
 
-    private final LocalDateTime lastRepaymentDate;
+    private final OffsetDateTime lastRepaymentDate;
 
-    private LoanTransactionData(final Long loanId, final LocalDateTime lastRepaymentDate, final BigDecimal remainingAmount,
+    private LoanTransactionData(final Long loanId, final OffsetDateTime lastRepaymentDate, final BigDecimal remainingAmount,
             final BigDecimal lastRepayment) {
         this.lastRepayment = lastRepayment;
         this.lastRepaymentDate = lastRepaymentDate;
@@ -39,7 +39,7 @@ public final class LoanTransactionData {
         this.loanId = loanId;
     }
 
-    public static LoanTransactionData instance(final Long loanId, final LocalDateTime lastRepaymentDate, final BigDecimal remainingAmount,
+    public static LoanTransactionData instance(final Long loanId, final OffsetDateTime lastRepaymentDate, final BigDecimal remainingAmount,
             final BigDecimal lastRepayment) {
         return new LoanTransactionData(loanId, lastRepaymentDate, remainingAmount, lastRepayment);
     }

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/LoanTransaction.java

@@ -20,7 +20,7 @@ package org.apache.fineract.portfolio.loanaccount.domain;
 
 import java.math.BigDecimal;
 import java.time.LocalDate;
-import java.time.LocalDateTime;
+import java.time.OffsetDateTime;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashSet;
@@ -37,7 +37,7 @@ import javax.persistence.ManyToOne;
 import javax.persistence.OneToMany;
 import javax.persistence.Table;
 import javax.persistence.UniqueConstraint;
-import org.apache.fineract.infrastructure.core.domain.AbstractAuditableCustom;
+import org.apache.fineract.infrastructure.core.domain.AbstractAuditableWithUTCDateTimeCustom;
 import org.apache.fineract.infrastructure.core.service.DateUtils;
 import org.apache.fineract.organisation.monetary.data.CurrencyData;
 import org.apache.fineract.organisation.monetary.domain.MonetaryCurrency;
@@ -56,7 +56,7 @@ import org.apache.fineract.portfolio.paymentdetail.domain.PaymentDetail;
  */
 @Entity
 @Table(name = "m_loan_transaction", uniqueConstraints = { @UniqueConstraint(columnNames = { "external_id" }, name = "external_id_UNIQUE") })
-public class LoanTransaction extends AbstractAuditableCustom {
+public class LoanTransaction extends AbstractAuditableWithUTCDateTimeCustom {
 
     @ManyToOne(optional = false)
     @JoinColumn(name = "loan_id", nullable = false)
@@ -726,8 +726,8 @@ public class LoanTransaction extends AbstractAuditableCustom {
         this.manuallyAdjustedOrReversed = true;
     }
 
-    public LocalDateTime getCreatedDateTime() {
-        return (this.getCreatedDate().isPresent() ? this.getCreatedDate().get() : DateUtils.getLocalDateTimeOfTenant());
+    public OffsetDateTime getCreatedDateTime() {
+        return (this.getCreatedDate().isPresent() ? this.getCreatedDate().get() : DateUtils.getOffsetDateTimeOfTenant());
     }
 
     public boolean isLastTransaction(final LoanTransaction loanTransaction) {
@@ -808,6 +808,10 @@ public class LoanTransaction extends AbstractAuditableCustom {
         return this.loanCollateralManagementSet;
     }
 
+    public LocalDate getSubmittedOnDate() {
+        return submittedOnDate;
+    }
+
     // TODO missing hashCode(), equals(Object obj), but probably OK as long as
     // this is never stored in a Collection.
 }

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/service/LoanReadPlatformServiceImpl.java

@@ -676,8 +676,7 @@ public class LoanReadPlatformServiceImpl implements LoanReadPlatformService {
                     + " left join m_loan_arrears_aging la on la.loan_id = l.id" //
                     + " left join m_fund f on f.id = l.fund_id" //
                     + " left join m_staff s on s.id = l.loan_officer_id" //
-                    + " left join m_appuser sbu on sbu.id = l.submittedon_userid"
-                    + " left join m_appuser rbu on rbu.id = l.rejectedon_userid"
+                    + " left join m_appuser sbu on sbu.id = l.created_by" + " left join m_appuser rbu on rbu.id = l.rejectedon_userid"
                     + " left join m_appuser wbu on wbu.id = l.withdrawnon_userid"
                     + " left join m_appuser abu on abu.id = l.approvedon_userid"
                     + " left join m_appuser dbu on dbu.id = l.disbursedon_userid" + " left join m_appuser cbu on cbu.id = l.closedon_userid"

fineract-provider/src/main/java/org/apache/fineract/portfolio/loanaccount/service/LoanWritePlatformServiceJpaRepositoryImpl.java

@@ -23,7 +23,6 @@ import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import java.math.BigDecimal;
 import java.time.LocalDate;
-import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -3302,8 +3301,7 @@ public class LoanWritePlatformServiceJpaRepositoryImpl implements LoanWritePlatf
     private void validateTransactionsForTransfer(final Loan loan, final LocalDate transferDate) {
 
         for (LoanTransaction transaction : loan.getLoanTransactions()) {
-            if ((transaction.getTransactionDate().isEqual(transferDate)
-                    && transaction.getCreatedDateTime().isEqual(transferDate.atStartOfDay(ZoneId.systemDefault()).toLocalDateTime()))
+            if ((transaction.getTransactionDate().isEqual(transferDate) && transaction.getSubmittedOnDate().isEqual(transferDate))
                     || transaction.getTransactionDate().isAfter(transferDate)) {
                 throw new GeneralPlatformDomainRuleException(TransferApiConstants.transferClientLoanException,
                         TransferApiConstants.transferClientLoanExceptionMessage, transaction.getCreatedDateTime().toLocalDate(),

fineract-provider/src/main/java/org/apache/fineract/portfolio/transfer/api/TransferApiConstants.java

@@ -38,10 +38,10 @@ public final class TransferApiConstants {
     public static final String destinationOfficeIdParamName = "destinationOfficeId";
     public static final String note = "note";
     public static final String transferDate = "transferDate";
-    public static final String transferClientLoanException = "error.msg.caanot.transfer.client.as.loan.transaction.present.on.or.after.transfer.date";
-    public static final String transferClientLoanExceptionMessage = "error msg caanot transfer client as loan transaction present on or after transfer date";
-    public static final String transferClientSavingsException = "error.msg.caanot.transfer.client.as.savings.transaction.present.on.or.after.transfer.date";
-    public static final String transferClientSavingsExceptionMessage = "error msg caanot transfer client as savings transaction present on or after transfer date";
-    public static final String transferClientToSameOfficeException = "error.msg.cannot.transfer.clinet.as.selected.office.and.current.office.are.same";
-    public static final String transferClientToSameOfficeExceptionMessage = "error.msg.cannot.transfer.clinet.as.selected.office.and.current.office.are.same";
+    public static final String transferClientLoanException = "error.msg.cannot.transfer.client.as.loan.transaction.present.on.or.after.transfer.date";
+    public static final String transferClientLoanExceptionMessage = "error msg cannot transfer client as loan transaction present on or after transfer date";
+    public static final String transferClientSavingsException = "error.msg.cannot.transfer.client.as.savings.transaction.present.on.or.after.transfer.date";
+    public static final String transferClientSavingsExceptionMessage = "error msg cannot transfer client as savings transaction present on or after transfer date";
+    public static final String transferClientToSameOfficeException = "error.msg.cannot.transfer.client.as.selected.office.and.current.office.are.same";
+    public static final String transferClientToSameOfficeExceptionMessage = "error.msg.cannot.transfer.client.as.selected.office.and.current.office.are.same";
 }

fineract-provider/src/main/resources/db/changelog/tenant/parts/0019_refactor_loan_transaction.xml

@@ -22,11 +22,11 @@
 <databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-4.1.xsd">
-    <changeSet author="fineract" id="1" onValidationFail="MARK_RAN">
+    <changeSet author="fineract" id="1">
+        <validCheckSum>8:4500ffb68c695d72caba498deff75643</validCheckSum>
         <addColumn tableName="m_loan_transaction">
             <column name="createdby_id" type="BIGINT" valueComputed="appuser_id"/>
             <column name="lastmodifiedby_id" type="BIGINT"/>
-            <column name="lastmodified_date" type="DATETIME"/>
         </addColumn>
     </changeSet>
     <changeSet id="2" author="fineract">

integration-tests/src/test/java/org/apache/fineract/integrationtests/LoanTransactionAuditingIntegrationTest.java

@@ -0,0 +1,211 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.fineract.integrationtests;
+
+import static org.apache.fineract.infrastructure.core.domain.AuditableFieldsConstants.CREATED_BY;
+import static org.apache.fineract.infrastructure.core.domain.AuditableFieldsConstants.CREATED_DATE;
+import static org.apache.fineract.infrastructure.core.domain.AuditableFieldsConstants.LAST_MODIFIED_BY;
+import static org.apache.fineract.infrastructure.core.domain.AuditableFieldsConstants.LAST_MODIFIED_DATE;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import io.restassured.builder.RequestSpecBuilder;
+import io.restassured.builder.ResponseSpecBuilder;
+import io.restassured.http.ContentType;
+import io.restassured.specification.RequestSpecification;
+import io.restassured.specification.ResponseSpecification;
+import java.time.OffsetDateTime;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import org.apache.fineract.integrationtests.common.ClientHelper;
+import org.apache.fineract.integrationtests.common.Utils;
+import org.apache.fineract.integrationtests.common.accounting.Account;
+import org.apache.fineract.integrationtests.common.accounting.AccountHelper;
+import org.apache.fineract.integrationtests.common.loans.LoanApplicationTestBuilder;
+import org.apache.fineract.integrationtests.common.loans.LoanProductTestBuilder;
+import org.apache.fineract.integrationtests.common.loans.LoanStatusChecker;
+import org.apache.fineract.integrationtests.common.loans.LoanTransactionHelper;
+import org.apache.fineract.integrationtests.common.organisation.StaffHelper;
+import org.apache.fineract.integrationtests.useradministration.users.UserHelper;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class LoanTransactionAuditingIntegrationTest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(LoanTransactionAuditingIntegrationTest.class);
+    private ResponseSpecification responseSpec;
+    private RequestSpecification requestSpec;
+    private LoanTransactionHelper loanTransactionHelper;
+    private AccountHelper accountHelper;
+
+    @BeforeEach
+    public void setup() {
+        Utils.initializeRESTAssured();
+        this.requestSpec = new RequestSpecBuilder().setContentType(ContentType.JSON).build();
+        this.requestSpec.header("Authorization", "Basic " + Utils.loginIntoServerAndGetBase64EncodedAuthenticationKey());
+
+        this.responseSpec = new ResponseSpecBuilder().expectStatusCode(200).build();
+        this.loanTransactionHelper = new LoanTransactionHelper(this.requestSpec, this.responseSpec);
+        this.accountHelper = new AccountHelper(this.requestSpec, this.responseSpec);
+    }
+
+    @Test
+    public void checkAuditDates() throws InterruptedException {
+        final Integer staffId = StaffHelper.createStaff(this.requestSpec, this.responseSpec);
+        String username = Utils.randomNameGenerator("user", 8);
+        final Integer userId = (Integer) UserHelper.createUser(this.requestSpec, this.responseSpec, 1, staffId, username, "resourceId");
+
+        LOG.info("-------------------------Creating Client---------------------------");
+
+        final Integer clientID = ClientHelper.createClient(requestSpec, responseSpec);
+        ClientHelper.verifyClientCreatedOnServer(requestSpec, responseSpec, clientID);
+        LOG.info("-------------------------Creating Loan---------------------------");
+        final Account assetAccount = this.accountHelper.createAssetAccount();
+        final Account incomeAccount = this.accountHelper.createIncomeAccount();
+        final Account expenseAccount = this.accountHelper.createExpenseAccount();
+        final Account overpaymentAccount = this.accountHelper.createLiabilityAccount();
+
+        final Integer loanProductID = createLoanProduct("0", "0", LoanProductTestBuilder.DEFAULT_STRATEGY, "2", assetAccount, incomeAccount,
+                expenseAccount, overpaymentAccount);
+
+        final Integer loanID = applyForLoanApplicationWithPaymentStrategyAndPastMonth(clientID, loanProductID, Collections.emptyList(),
+                null, "10000", LoanApplicationTestBuilder.DEFAULT_STRATEGY, "10 July 2022");
+        Assertions.assertNotNull(loanID);
+        HashMap loanStatusHashMap = LoanStatusChecker.getStatusOfLoan(this.requestSpec, this.responseSpec, loanID);
+        LoanStatusChecker.verifyLoanIsPending(loanStatusHashMap);
+
+        LOG.info("-----------------------------------APPROVE LOAN-----------------------------------------");
+        loanStatusHashMap = this.loanTransactionHelper.approveLoan("11 July 2022", loanID);
+        LoanStatusChecker.verifyLoanIsApproved(loanStatusHashMap);
+        loanStatusHashMap = this.loanTransactionHelper.disburseLoan("11 July 2022", loanID, "10000");
+        LoanStatusChecker.verifyLoanIsActive(loanStatusHashMap);
+
+        OffsetDateTime now = OffsetDateTime.now(ZoneId.of("Asia/Kolkata"));
+        // Testing in minutes precision, but still need to take care around the end of the actual minute
+        if (now.getSecond() > 56) {
+            Thread.sleep(5000);
+            now = OffsetDateTime.now(ZoneId.of("Asia/Kolkata"));
+        }
+        HashMap repaymentDetails = this.loanTransactionHelper.makeRepayment("11 July 2022", 100.0f, loanID);
+        Integer transactionId = (Integer) repaymentDetails.get("resourceId");
+        HashMap auditFieldsResponse = LoanTransactionHelper.getLoanTransactionAuditFields(requestSpec, responseSpec, loanID, transactionId,
+                "");
+
+        OffsetDateTime createdDate = OffsetDateTime.parse((String) auditFieldsResponse.get(CREATED_DATE),
+                DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+
+        OffsetDateTime lastModifiedDate = OffsetDateTime.parse((String) auditFieldsResponse.get(LAST_MODIFIED_DATE),
+                DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+
+        LOG.info("-------------------------Check Audit dates---------------------------");
+        assertEquals(1, auditFieldsResponse.get(CREATED_BY));
+        assertEquals(now.getYear(), createdDate.getYear());
+        assertEquals(now.getMonth(), createdDate.getMonth());
+        assertEquals(now.getDayOfMonth(), createdDate.getDayOfMonth());
+        assertEquals(now.getHour(), createdDate.getHour());
+        assertEquals(now.getMinute(), createdDate.getMinute());
+
+        assertEquals(1, auditFieldsResponse.get(LAST_MODIFIED_BY));
+        assertEquals(now.getYear(), lastModifiedDate.getYear());
+        assertEquals(now.getMonth(), lastModifiedDate.getMonth());
+        assertEquals(now.getDayOfMonth(), lastModifiedDate.getDayOfMonth());
+        assertEquals(now.getHour(), lastModifiedDate.getHour());
+        assertEquals(now.getMinute(), lastModifiedDate.getMinute());
+
+        Thread.sleep(2000);
+
+        this.requestSpec = new RequestSpecBuilder().setContentType(ContentType.JSON).build();
+        this.requestSpec.header("Authorization",
+                "Basic " + Utils.loginIntoServerAndGetBase64EncodedAuthenticationKey(username, "password"));
+
+        this.loanTransactionHelper = new LoanTransactionHelper(this.requestSpec, this.responseSpec);
+        this.loanTransactionHelper.reverseRepayment(loanID, transactionId, "11 July 2022");
+
+        now = OffsetDateTime.now(ZoneId.of("Asia/Kolkata"));
+
+        auditFieldsResponse = LoanTransactionHelper.getLoanTransactionAuditFields(requestSpec, responseSpec, loanID, transactionId, "");
+
+        createdDate = OffsetDateTime.parse((String) auditFieldsResponse.get(CREATED_DATE), DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+
+        lastModifiedDate = OffsetDateTime.parse((String) auditFieldsResponse.get(LAST_MODIFIED_DATE),
+                DateTimeFormatter.ISO_OFFSET_DATE_TIME);
+
+        LOG.info("-------------------------Check Audit dates---------------------------");
+        assertEquals(1, auditFieldsResponse.get(CREATED_BY));
+        assertEquals(now.getYear(), createdDate.getYear());
+        assertEquals(now.getMonth(), createdDate.getMonth());
+        assertEquals(now.getDayOfMonth(), createdDate.getDayOfMonth());
+        assertEquals(now.getHour(), createdDate.getHour());
+        assertEquals(now.getMinute(), createdDate.getMinute());
+
+        now = OffsetDateTime.now(ZoneId.of("Asia/Kolkata"));
+
+        assertEquals(userId, auditFieldsResponse.get(LAST_MODIFIED_BY));
+        assertEquals(now.getYear(), lastModifiedDate.getYear());
+        assertEquals(now.getMonth(), lastModifiedDate.getMonth());
+        assertEquals(now.getDayOfMonth(), lastModifiedDate.getDayOfMonth());
+        assertEquals(now.getHour(), lastModifiedDate.getHour());
+        assertEquals(now.getMinute(), lastModifiedDate.getMinute());
+    }
+
+    private Integer applyForLoanApplicationWithPaymentStrategyAndPastMonth(final Integer clientID, final Integer loanProductID,
+            List<HashMap> charges, final String savingsId, String principal, final String repaymentStrategy, final String submittedOnDate) {
+        LOG.info("--------------------------------APPLYING FOR LOAN APPLICATION--------------------------------");
+
+        final String loanApplicationJSON = new LoanApplicationTestBuilder() //
+                .withPrincipal(principal) //
+                .withLoanTermFrequency("6") //
+                .withLoanTermFrequencyAsMonths() //
+                .withNumberOfRepayments("6") //
+                .withRepaymentEveryAfter("1") //
+                .withRepaymentFrequencyTypeAsMonths() //
+                .withInterestRatePerPeriod("2") //
+                .withAmortizationTypeAsEqualInstallments() //
+                .withInterestTypeAsFlatBalance() //
+                .withInterestCalculationPeriodTypeSameAsRepaymentPeriod() //
+                .withExpectedDisbursementDate(submittedOnDate) //
+                .withSubmittedOnDate(submittedOnDate) //
+                .withwithRepaymentStrategy(repaymentStrategy) //
+                .withCharges(charges).build(clientID.toString(), loanProductID.toString(), savingsId);
+        return this.loanTransactionHelper.getLoanId(loanApplicationJSON);
+    }
+
+    private Integer createLoanProduct(final String inMultiplesOf, final String digitsAfterDecimal, final String repaymentStrategy,
+            final String accountingRule, final Account... accounts) {
+        LOG.info("------------------------------CREATING NEW LOAN PRODUCT ---------------------------------------");
+        final String loanProductJSON = new LoanProductTestBuilder() //
+                .withPrincipal("10000000.00") //
+                .withNumberOfRepayments("24") //
+                .withRepaymentAfterEvery("1") //
+                .withRepaymentTypeAsMonth() //
+                .withinterestRatePerPeriod("2") //
+                .withInterestRateFrequencyTypeAsMonths() //
+                .withRepaymentStrategy(repaymentStrategy) //
+                .withAmortizationTypeAsEqualPrincipalPayment() //
+                .withInterestTypeAsDecliningBalance() //
+                .currencyDetails(digitsAfterDecimal, inMultiplesOf).withAccounting(accountingRule, accounts).build(null);
+        return this.loanTransactionHelper.getLoanProductId(loanProductJSON);
+    }
+
+}

integration-tests/src/test/java/org/apache/fineract/integrationtests/common/loans/LoanTransactionHelper.java

@@ -63,6 +63,7 @@ public class LoanTransactionHelper {
     private static final String WRITE_OFF_LOAN_COMMAND = "writeoff";
     private static final String WAIVE_INTEREST_COMMAND = "waiveinterest";
     private static final String MAKE_REPAYMENT_COMMAND = "repayment";
+    private static final String UNDO = "undo";
     private static final String CREDIT_BALANCE_REFUND_COMMAND = "creditBalanceRefund";
     private static final String WITHDRAW_LOAN_APPLICATION_COMMAND = "withdrawnByApplicant";
     private static final String RECOVER_FROM_GUARANTORS_COMMAND = "recoverGuarantees";
@@ -360,6 +361,10 @@ public class LoanTransactionHelper {
                 getRepaymentBodyAsJSON(date, amountToBePaid), "");
     }
 
+    public HashMap reverseRepayment(final Integer loanId, final Integer transactionId, String date) {
+        return (HashMap) performLoanTransaction(createLoanTransactionURL(UNDO, loanId, transactionId), getUndoJsonBody(date), "");
+    }
+
     public HashMap makeRepaymentWithPDC(final String date, final Float amountToBePaid, final Integer loanID, final Integer paymentType) {
         return (HashMap) performLoanTransaction(createLoanTransactionURL(MAKE_REPAYMENT_COMMAND, loanID),
                 getRepaymentWithPDCBodyAsJSON(date, amountToBePaid, paymentType), "");
@@ -554,6 +559,15 @@ public class LoanTransactionHelper {
         return new Gson().toJson(map);
     }
 
+    private String getUndoJsonBody(String date) {
+        final HashMap<String, String> map = new HashMap<>();
+        map.put("transactionDate", date);
+        map.put("transactionAmount", "0");
+        map.put("dateFormat", "dd MMMM yyyy");
+        map.put("locale", "en");
+        return new Gson().toJson(map);
+    }
+
     private String getRepaymentWithPDCBodyAsJSON(final String transactionDate, final Float transactionAmount, final Integer paymentTypeId) {
         final HashMap<String, String> map = new HashMap<>();
         map.put("locale", "en");
@@ -708,6 +722,11 @@ public class LoanTransactionHelper {
         return "/fineract-provider/api/v1/loans/" + loanID + "/transactions?command=" + command + "&" + Utils.TENANT_IDENTIFIER;
     }
 
+    private String createLoanTransactionURL(final String command, final Integer loanID, final Integer transactionId) {
+        return "/fineract-provider/api/v1/loans/" + loanID + "/transactions/" + transactionId + "?command=" + command + "&"
+                + Utils.TENANT_IDENTIFIER;
+    }
+
     private String createGlimAccountURL(final String command, final Integer glimID) {
         return "/fineract-provider/api/v1/loans/glimAccount/" + glimID + "?command=" + command + "&" + Utils.TENANT_IDENTIFIER;
     }
@@ -950,4 +969,20 @@ public class LoanTransactionHelper {
         return Utils.performServerOutputTemplateLocationGet(requestSpec, responseSpec,
                 "/fineract-provider/api/v1/imports/getOutputTemplateLocation" + "?" + Utils.TENANT_IDENTIFIER, importDocumentId);
     }
+
+    public static HashMap<String, Object> getLoanAuditFields(final RequestSpecification requestSpec,
+            final ResponseSpecification responseSpec, final Integer loanId, final String jsonReturn) {
+        final String GET_LOAN_URL = "/fineract-provider/api/v1/internal/loan/" + loanId + "/audit?" + Utils.TENANT_IDENTIFIER;
+        LOG.info("---------------------------------GET A LOAN ENTITY AUDIT FIELDS---------------------------------------------");
+        return Utils.performServerGet(requestSpec, responseSpec, GET_LOAN_URL, jsonReturn);
+    }
+
+    public static HashMap<String, Object> getLoanTransactionAuditFields(final RequestSpecification requestSpec,
+            final ResponseSpecification responseSpec, final Integer loanId, final Integer transactionId, final String jsonReturn) {
+        final String GET_LOAN_TRANSACTION_URL = "/fineract-provider/api/v1/internal/loan/" + loanId + "/transaction/" + transactionId
+                + "/audit?" + Utils.TENANT_IDENTIFIER;
+        LOG.info(
+                "---------------------------------GET A LOAN TRANSACTION ENTITY AUDIT FIELDS---------------------------------------------");
+        return Utils.performServerGet(requestSpec, responseSpec, GET_LOAN_TRANSACTION_URL, jsonReturn);
+    }
 }