# AddOnionResponse Decoded fields of an `ADD_ONION` success reply (control-spec.txt §3.27). ``` struct AddOnionResponse ``` ## Overview Tor emits `ServiceID=` on success, optionally followed by a `PrivateKey=:` line when the command was issued **without** the `DiscardPK` flag. This struct carries just those two fields; higher-level code wraps them into an [`OnionService`](/documentation/Tor/OnionService) value along with a creation timestamp. > Note: Conformance is `Sendable` + `Equatable`. > Important: ``doc://Tor/documentation/Tor/AddOnionResponse/privateKey`` is secret material. Never log or > serialise it unprotected — see ``doc://Tor/documentation/Tor/OnionService/privateKey`` for > storage guidance. ## Topics ### Fields [`serviceID`](/documentation/Tor/AddOnionResponse/serviceID) The v3 service ID (56-char base32, no `.onion` suffix). [`privateKey`](/documentation/Tor/AddOnionResponse/privateKey) The private key blob, or `nil` when `DiscardPK` was set. ### Creating [`init(serviceID:privateKey:)`](/documentation/Tor/AddOnionResponse/init(serviceID:privateKey:)) Memberwise initialiser. Typically invoked by [`parseAddOnionResponse(_:)`](/documentation/Tor/ControlProtocolParser/parseAddOnionResponse(_:)-rg89).