in service/src/main/java/org/apache/fineract/cn/deposit/service/internal/service/TransactionService.java [261:282]
private AccountWrapper validateAndGetAccount(@NotNull TransactionRequestData request, String accountId, TransactionTypeEnum txnType) {
//TODO: error handling
Account account = ledgerManager.findAccount(accountId);
validateAccount(request.getAmount(), account);
ProductInstanceEntity instance = productInstanceRepository.findByAccountIdentifier(accountId).orElseThrow(
() -> ServiceException.notFound("Account {0} not found", accountId)
);
ProductDefinition productDefinition = productDefinitionService.findProductDefinition(instance.getProductDefinition().getIdentifier()).get();
Currency currency = productDefinition.getCurrency();
if (!currency.getCode().equals(request.getAmount().getCurrency()))
throw new UnsupportedOperationException();
request.normalizeAmounts(currency);
Double withdrawableBalance = getWithdrawableBalance(account, productDefinition);
if (txnType == TransactionTypeEnum.WITHDRAWAL && withdrawableBalance < request.getAmount().getAmount().doubleValue())
throw new UnsupportedOperationException();
return new AccountWrapper(account, instance, productDefinition, withdrawableBalance);
}