shipping-portal/app/Models/Receipt.php

<?php

namespace App\Models;

use Eloquent;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Database\Eloquent\Collection;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\HasOne;
use Spatie\Activitylog\Models\Activity;


/**
 * App\Models\Receipt
 *
 * @property-read Collection|Activity[] $activities
 * @property-read int|null $activities_count
 * @property-read Model|Eloquent $causer
 * @property-read Currency|null $currency
 * @property-read Currency|null $original_currency
 * @property-read Model|Eloquent $subject
 * @property-read Model|Eloquent $target
 * @property-read Transaction|null $transaction
 * @method static Builder|Receipt newModelQuery()
 * @method static Builder|Receipt newQuery()
 * @method static Builder|Receipt query()
 * @mixin Eloquent
 */
class Receipt extends AbstractModel
{
    protected $table = 'receipt';

    public function transaction(): HasOne
    {
        return $this->hasOne(Transaction::class, 'transaction_id', 'id');
    }

    public function currency(): HasOne
    {
        return $this->hasOne(Currency::class, 'currency_id', 'id');
    }

    public function original_currency(): HasOne
    {
        return $this->hasOne(Currency::class, 'original_currency_id', 'id');
    }

}