<p>The Balance Service, allows to view transaction history, provides a dashboard for bank employees to monitor all customers bank transactions. The system also provides a statistical module for employees, which can report total and average (per account) transactions (deposits, withdrawals, outgoing and incoming payments) in a selected date range.</p>
<p>The Balance Service, allows to view current balance of an account and
transaction history of an account from some date range. It also provides bank
employees an ability to monitor all customers bank transactions.
The service also provides a statistical module (for employees), which can
report total and average (per account) transactions (deposits, withdrawals,
outgoing and incoming payments) in a selected date range.</p>
<p>This service is composed of classes as can be seen on the diagram,
in repository there are balances of accounts stored. Every balance class has
current balance stored in itself together with a list of transactions which
led to this balance. Transaction consist of amount of money, transaction type,
time when it was stored, and processID created by transaction processor service.
This service allows also creation of reports, which are computed from issued transactions.
Report class consists of six transactionStatistics classes, one for each type of
transaction and one for all transactions together. In this transactionStatistics
class, there is the total amount incoming/outgoing to/from account stored, with how many
times there was incoming/outgoing transaction.</p>
