public function name(): string
{
	return 'Director Allowance'
}

public function type(): string;
{
	return \CleaniqueCoders\Payslip\Payslip::EARNING; // for earning
	// return \CleaniqueCoders\Payslip\Payslip::DEDUCTION; // for deduction
}

public function contribution()
{
	return 1000; // do your logic to get the amount of contribution
}

// implement CleaniqueCoders\Payslip\Contracts\Employee interface
$employee = new \App\Models\Employee();
$salary   = new \CleaniqueCoders\Payslip\Salary();

// Earnings
// Implement CleaniqueCoders\Payslip\Contracts\Contribution interface
$basic_salary = new \App\Processors\Payslip\Earnings\BasicSalary();
$basic_salary->setAmount(5000);
$salary->addEarnings($basic_salary);

// Implement CleaniqueCoders\Payslip\Contracts\Contribution interface
$travel_allowance = new \App\Processors\Payslip\Earnings\TravelAllowance();
$travel_allowance->setAmount(500);
$salary->addEarnings($travel_allowance);

// @todo Deductions

// Payslip accept CleaniqueCoders\Payslip\Contracts\Employee contracts and
// CleaniqueCoders\Payslip\Salary object in the constructor
$payslip = new \CleaniqueCoders\Payslip\Payslip($employee, $salary);
$payslip
    ->setYear(2018)
    ->setMonth(10)
    ->setPayday('2018-10-28')
    ->handle();

$summary = $payslip->getSummary();