<?php
 namespace App\Http\Requests\Admin; use Illuminate\Foundation\Http\FormRequest; class BillingCalculateTaxRequest extends FormRequest { public function authorize(): bool { return true; } public function rules(): array { return [ 'client_id' => ['nullable', 'exists:clients,id'], 'items' => ['required', 'array', 'min:1'], 'items.*.amount' => ['required', 'numeric', 'min:0'], 'items.*.product_type' => ['nullable', 'string'], ]; } } 