initial: bootstrap from BukidBountyApp base

app/Models/Subscription/SubscriptionInvoice.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models\Subscription;
+
+use Hyperf\DbConnection\Model\Model;
+use App\Models\User;
+
+class SubscriptionInvoice extends Model
+{
+    protected ?string $table = 'subscription_invoices';
+
+    public bool $incrementing = true;
+
+    protected array $fillable = [
+        'hashkey',
+        'subscription_id',
+        'user_id',
+        'amount',
+        'status',
+        'paid_at',
+        'payment_method',
+        'payment_reference',
+        'additional_details',
+        'created_by',
+        'updated_by',
+    ];
+
+    protected array $casts = [
+        'amount' => 'float',
+        'paid_at' => 'datetime',
+        'additional_details' => 'array',
+    ];
+
+    public function subscription()
+    {
+        return $this->belongsTo(Subscription::class, 'subscription_id');
+    }
+
+    public function user()
+    {
+        return $this->belongsTo(User::class, 'user_id');
+    }
+}