Answers for "decimal value only validation in laravel"

laravel validation types for float

//For float, must use numeric validator

/**
  * Get the validation rules that apply to the request.
  *
  * @return array
 */
public function rules()
{
  return [
    'field' => 'numeric'
  ];
}

laravel validation digits

'last4digits' => 'digits:4'