ladill-hosting/app/Models/HostingBillingInvoice.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;

class HostingBillingInvoice extends Model
{
    use HasFactory;

    public const TYPE_PLAN_CHANGE = 'plan_change';
    public const TYPE_EMAIL_ADDON = 'email_addon';
    public const TYPE_RENEWAL = 'renewal';

    public const STATUS_PENDING = 'pending';
    public const STATUS_PAID = 'paid';
    public const STATUS_CREDITED = 'credited';
    public const STATUS_WAIVED = 'waived';

    protected $fillable = [
        'user_id',
        'hosting_account_id',
        'hosting_plan_change_id',
        'invoice_type',
        'status',
        'currency',
        'subtotal_amount',
        'credit_amount',
        'total_amount',
        'description',
        'provider_reference',
        'paid_at',
        'line_items',
        'metadata',
    ];

    protected $casts = [
        'subtotal_amount' => 'decimal:2',
        'credit_amount' => 'decimal:2',
        'total_amount' => 'decimal:2',
        'paid_at' => 'datetime',
        'line_items' => 'array',
        'metadata' => 'array',
    ];

    public function user(): BelongsTo
    {
        return $this->belongsTo(User::class);
    }

    public function account(): BelongsTo
    {
        return $this->belongsTo(HostingAccount::class, 'hosting_account_id');
    }

    public function planChange(): BelongsTo
    {
        return $this->belongsTo(HostingPlanChange::class, 'hosting_plan_change_id');
    }
}