Optional
Return the private component of a node key pair if it exists.
if the backend failed to retrieve the key due to an error
Retrieve private session key, regardless of whether it's an initial key or not.
The key pair id (typically the serial number)
The id of the node that owns the key
The id of the recipient, in case the key is bound to a recipient
UnknownKeyError when the key does not exist
PrivateKeyStoreError when the look-up could not be done
Return the public key of the latest, unbound session key pair for the specified nodeId.
nodeId
The public key if it exists or null otherwise
null
Return the private component of a node key pair if it exists.