https://blog.cloudflare.com/cloudflare-onion-service
>an onion service’s point of view each individual Tor connection, or circuit, has a unique but ephemeral number associated to it
>Using this circuit number, onion services can distinguish individual circuits and terminate those that seem to behave maliciously.
Как этот ephemeral number получить? Я так понимаю это аналог X-I2P-Dest? В хедерах нету.