ruchiD commented on code in PR #3367:
URL: https://github.com/apache/fineract/pull/3367#discussion_r1293071854


##########
fineract-loan/src/main/java/org/apache/fineract/portfolio/loanaccount/domain/Loan.java:
##########
@@ -2954,6 +2956,51 @@ private void handleDisbursementTransaction(final 
LocalDate disbursedOn, final Pa
 
     }
 
+    public void handleDownPayment(final BigDecimal disbursedAmount, final 
JsonCommand command,
+            final ScheduleGeneratorDTO scheduleGeneratorDTO) {
+        if (isAutoRepaymentForDownPaymentEnabled()) {
+            LocalDate disbursedOn = 
command.localDateValueOfParameterNamed(ACTUAL_DISBURSEMENT_DATE);
+            BigDecimal disbursedAmountPercentageForDownPayment = 
this.loanRepaymentScheduleDetail
+                    .getDisbursedAmountPercentageForDownPayment();
+            ExternalId externalId = ExternalId.empty();
+            if 
(TemporaryConfigurationServiceContainer.isExternalIdAutoGenerationEnabled()) {
+                externalId = ExternalId.generate();
+            }
+            Money downPaymentMoney = Money.of(getCurrency(), 
percentageOf(disbursedAmount, disbursedAmountPercentageForDownPayment));
+            LoanTransaction downPaymentTransaction = 
LoanTransaction.downPayment(getOffice(), downPaymentMoney, null, disbursedOn,
+                    externalId);
+            /**
+             * Currently mapping down payment transaction as repayment 
transaction to loan repayment schedule for
+             * consistency. Need to replace below logic for creating new 
installment for down payment and mapping.
+             */
+
+            LoanEvent event = LoanEvent.LOAN_REPAYMENT_OR_WAIVER;
+            validateRepaymentTypeAccountStatus(downPaymentTransaction, event);
+            HolidayDetailDTO holidayDetailDTO = 
scheduleGeneratorDTO.getHolidayDetailDTO();
+            
validateRepaymentDateIsOnHoliday(downPaymentTransaction.getTransactionDate(), 
holidayDetailDTO.isAllowTransactionsOnHoliday(),
+                    holidayDetailDTO.getHolidays());
+            
validateRepaymentDateIsOnNonWorkingDay(downPaymentTransaction.getTransactionDate(),
 holidayDetailDTO.getWorkingDays(),
+                    holidayDetailDTO.isAllowTransactionsOnNonWorkingDay());
+
+            
handleRepaymentOrRecoveryOrWaiverTransaction(downPaymentTransaction, 
loanLifecycleStateMachine, null, scheduleGeneratorDTO);
+        }
+    }
+
+    private BigDecimal percentageOf(final BigDecimal value, final BigDecimal 
percentage) {

Review Comment:
   Moved method to MathUtil as operation is performed on BigDecimal amount.
   @reluxa I checked amount saved in db for this example disbursedAmount = 
99.19, percentage is 19. Downpayment amount is saved as 18.85 as rounding of 
and numbers after decimal for amount are derived for currency settings. For 
this test number of digits to be considered after decimal for currency was set 
as 2.



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