public function rules(): array 	{ 		return [ 			'results' => ['required', 'array'], 			'results.*.to' => ['required', 'string', 'max:20'], 			'results.*.messageId' => ['required', 'string', 'max:50'], 			'results.*.smsCount' => ['required', 'integer', 'min:1'], 			'results.*.price.pricePerMessage' => ['required', 'numeric', 'min:0'], 			'results.*.price.currency' => ['required', 'string', 'max:3'], 			'results.*.status.groupName' => ['required', 'string', 'max:20'], 		]; 	}