Basic implementation of payment methods

app/Models/PaymentMethod.php

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+<?php
+
+namespace App\Models;
+
+use App\Scopes\CommonModel;
+use Illuminate\Database\Eloquent\Concerns\HasUuids;
+
+/**
+ * @property string $id
+ * @property string $slug
+ */
+class PaymentMethod extends CommonModel
+{
+    use HasUuids;
+
+    public $incrementing = false;
+    protected $keyType = 'string';
+
+    public const string PAYMENT_ACCOUNT_TRANSACTION = 'PAYMENT_ACCOUNT_TRANSACTION';
+    public const string PAYMENT_NOT_DEFINED = 'PAYMENT_NOT_DEFINED';
+
+    public const array DEFAULTS = [
+        self::PAYMENT_ACCOUNT_TRANSACTION => ['name' => 'Überweisung auf Veranstaltungskonto', 'description' => null],
+        self::PAYMENT_NOT_DEFINED => ['name' => 'Sonstiges (Barzahlung, Zahlung vor Ort)', 'description' => null],
+    ];
+
+    protected $fillable = [
+        'slug',
+    ];
+}