Participant mangement

app/Providers/MissingPaymentProvider.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Providers;
+
+use App\ValueObjects\Amount;
+
+class MissingPaymentProvider {
+    public static function calculateMissingPayment(Amount $amountPaid, Amount $amountToPay) : Amount {
+        $workingAmount = clone($amountToPay);
+
+
+        $workingAmount->subtractAmount($amountPaid);
+        return $workingAmount;
+    }
+}