add: copy serviceType models file from exchange2.0.

app/Models/ServiceType.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Models;
+
+use App\Classes\ValueObjects\Constants\SegmentConstants;
+use App\Models\AbstractModel as Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+
+/**
+ * Class ServiceType
+ * @package App\Models
+ * @version February 16, 2021, 9:04 pm
+ *
+ * @property string name
+ */
+class ServiceType extends AbstractModel
+{
+
+    use SoftDeletes;
+
+
+    protected $table = 'service_types';
+
+
+
+    protected $dates = ['deleted_at'];
+
+
+
+    public $fillable = [
+        'name'
+    ];
+
+    /**
+     * The attributes that should be casted to native types.
+     *
+     * @var array
+     */
+    protected $casts = [
+        'name' => 'string'
+    ];
+
+    /**
+     * Validation rules
+     *
+     * @var array
+     */
+    public static $rules = [
+        'name' => 'required'
+    ];
+
+    /**
+     * @return hasMany
+     */
+    public function rates(): hasMany
+    {
+        return $this->hasMany(CurrencyRate::class, 'service_id');
+    }
+
+    /**
+     * @return hasMany
+     */
+    public function constants(): hasMany
+    {
+        return $this->hasMany(SegmentConstant::class, 'detail->id')
+            ->whereIn('reference', [SegmentConstants::SERVICE_TYPE, SegmentConstants::CUSTOM_SERVICE_TYPE]);
+    }
+}