DebtSimplifier

simplifyDebt(map<> balances);

string groupId;

string name;

vector<User> members;

map<> expenses;

map<> balances;

addMember(User&);

removeMember(User&);

notify();

updateGroupBal(fromId, toId, amt);

addExpense();

settlePayment(from, to, amt);

simplifyDebt();

string userId;

string name;

string email;

map<string,double> balances;

update(msg);

updateBal(otherId, amt);

Observer

update(msg);

Splitwise

map<> users;

map<> groups;

map<> expenses;

settleIndividualPayment()<?>

addIndividualExpense()<?>

Expense

string id;

string desc;

double amt;

string paidUserId;

vector<Split> splits;

string groupId;

SplitFactory

getSplitStrat(StrategyType t);

<<Model>>

Split

string userId;

string amount;

calcSplit(double totalAmt, vector<> userIds, vector<> values);

calcSplit();

calcSplit();

calcSplit();

SplitType

EQUAL,

EXACT,

PERCENTAGE