first commit

common/Billing/Invoices/Invoice.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Common\Billing\Invoices;
+
+use Common\Billing\Subscription;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Invoice extends Model
+{
+    protected $guarded = ['id'];
+
+    protected $casts = [
+        'id' => 'integer',
+        'subscription_id' => 'integer',
+        'paid' => 'boolean',
+    ];
+
+    const MODEL_TYPE = 'invoice';
+
+    public static function getModelTypeAttribute(): string
+    {
+        return self::MODEL_TYPE;
+    }
+
+    public function subscription(): BelongsTo
+    {
+        return $this->belongsTo(Subscription::class);
+    }
+}