Consultar MDF-e não encerrados

use Suot\Fiscal\Core\Exception\InfrastructureException;
use Suot\Fiscal\Core\Result\RetryMode;
use Suot\Fiscal\Core\ValueObject\Uf;

try {
    $result = $mdfe->nonClosed()
        ->forOperation('ot-123-mdfe-non-closed')
        ->inHomologation()
        ->issuerUf(new Uf('RS'))
        ->emitterCnpj($cnpj)
        ->handle();
} catch (InfrastructureException $e) {
    $failure = $e->toFailure('non_closed');
    // Host: alertar; filar retry conforme $failure->retryPolicy
    throw $e;
}

if ($result->isSuccessful()) {
    // Host: listar chaves abertas; bloquear emissão se a placa/UF conflitar; orientar encerramento
}

if (! $result->isSuccessful()) {
    $failure = $result->failure();
    $policy = $result->retryPolicy();
    match ($policy?->mode) {
        RetryMode::AfterDelay, RetryMode::Immediate => /* filar nova consulta */,
        RetryMode::Never, null => /* tratar falha definitiva */,
        default => /* seguir recoveryGuide */,
    };
}